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Academic literature on the topic 'Ichthyoplankton'

Author: Grafiati

Published: 4 June 2021

Last updated: 9 June 2025

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Journal articles on the topic "Ichthyoplankton"

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Li, Shuofu, Jianguo He, and Zhigang Lai. "The Interannual Variations of Summer Ichthyoplankton in the Pearl River Estuary as a Response to Climate Change." Journal of Marine Science and Engineering 11, no. 1 (January 13, 2023): 209. http://dx.doi.org/10.3390/jmse11010209.

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The impacts of climate change on ichthyoplankton have barely been examined in the Pearl River estuary (PRE). Using the fish larvae and eggs caught in the estuary in the summer from 2003 to 2018 (except for the years 2004 and 2008), the spatial and temporal variations in ichthyoplankton’s abundance, species composition, and community structure were examined and linked to the variability of the climate system. A positive/negative correlation was found between the abundance and taxonomic diversity of the fish larvae and the monthly Oceanic Niño Index. However, the variation in larval fish’s species diversity was in phase with climate change, while the variation in larval fish’s abundance had a 3-month lag behind the climate variability. The different phases of the correlations reflect a progressive change in the ichthyoplankton dynamics under the influence of climate. Furthermore, during the period of the study, the regional climate underwent an obvious transition from a “cold” to a “warm” state in the early 2010s. Associated with that, it was found that both the abundance and species composition of the ichthyoplankton exhibit a significant change around that time, particularly for the fish larvae. A further examination of the ichthyoplankton’s horizontal distributions suggests that the assemblage of ichthyoplankton in the PRE is sensitive to the La Niña conditions. This leads to an overall reduction in ichthyoplankton’s abundance and less seaward spreading of the assemblage, implying the possible impact of climate change on river discharge and then the estuarine environment.

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Reynalte-Tataje, David Augusto, Keshiyu Nakatani, Rodrigo Fernandes, Angelo Antônio Agostinho, and Andréa Bialetzki. "Temporal distribution of ichthyoplankton in the Ivinhema River (Mato Grosso do Sul State/ Brazil): influence of environmental variables." Neotropical Ichthyology 9, no. 2 (June 10, 2011): 427–36. http://dx.doi.org/10.1590/s1679-62252011005000017.

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Information on ichthyoplankton is an important tool in determining reproduction periods that - if associated to environmental variables - allows for inferences about the factors that regulate their intensity, beginning, and ending. In this context, this study aims to establish (i) ichthyoplankton composition; (ii) temporal variations in the overall density of eggs and larvae and among the most important taxa; and (iii) the influence of some abiotic and biotic variables on these organisms' abundance. Ichthyoplankton sampling was undertaken during the period between April 2005 and March 2006 at the Ivinhema River, upper Paraná River basin (MS/Brazil). Differences in the ichthyoplankton's temporal variation were evaluated using unifactorial ANOVAs. Principal Component Analysis and Pearson's correlation were used for the relationships between eggs and larvae densities and environmental variables. A total of 3,341 eggs and 2,896 larvae were captured during the period studied, and most of them were medium-sized and large species that carried out some type of reproductive migration. The highest densities of eggs and larvae occurred during the months of spring and summer, except for those of Bryconamericus stramineus, which was most abundant during the winter. The density of ichthyoplankton was most positively correlated with the water's outflow and temperature. However, Plagioscion squamosissimus was positively related to the increase in pH and in zooplanktonic organisms, while B. stramineus was inversely correlated with water outflow and temperature. The study concludes that spawning is most intense in the spring and summer, especially between November and January, and is related to the greatest values of water temperature and outflow. Nevertheless, the response and reproductive intensity in relation to the environmental variables vary according to the species.

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Zhang, Hui, Weiwei Xian, and Shude Liu. "Autumn ichthyoplankton assemblage in the Yangtze Estuary shaped by environmental factors." PeerJ 4 (April 19, 2016): e1922. http://dx.doi.org/10.7717/peerj.1922.

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This study investigated the response of the ichthyoplankton community to environmental changes in the Yangtze Estuary using canonical correspondence analysis. Ichthyoplankton community and environmental data were recorded during the autumns of 1998, 2000, 2002, 2003, 2004, 2007 and 2009. Among the ichthyoplankton, the dominant larval and juvenile families were the Engraulidae, Gobiidae and Salangidae, and the most common eggs were fromTrichiurus lepturus. The ichthyoplankton was identified via canonical correspondence analysis to three assemblages: an estuary assemblage dominated byChaeturichthys stigmatias, a coastal assemblage dominated byEngraulis japonicusandStolephorus commersonii, and an offshore assemblage dominated byTrichiurus lepturus. Regarding environmental factors in the Yangtze Estuary, suspended matter and surface seawater salinity were the main factors influencing the distributions of the different assemblages, while sediment from the Yangtze River during the rainy season and chlorophyllawere the principle drivers of the annual variances in the distribution of ichthyoplankton assemblages. Our aims in this study were to provide detailed characterizations of the ichthyoplankton assemblage in the autumns of seven years, examine the long-term dynamics of autumn ichthyoplankton assemblages, and evaluate the influence of environmental factors on the spatial distribution and inter-annual variations of ichthyoplankton assemblages associated with the Yangtze Estuary.

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Mukhametov, I. N., O. N. Mukhametova, and V. N. Chastikov. "The spring ichthyoplankton of pacific water off northern Kuril Islands." Trudy VNIRO 190 (December 28, 2022): 62–78. http://dx.doi.org/10.36038/2307-3497-2022-190-62-78.

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The aim of the work is assesment of the species composition and spatial distribution of spring ichthyoplankton in area off northern Kuril Islands.Material and methods. It is based on the data of ichthyoplankton sampling in 2011, 2015 and 2016 yrs, trawl surveys in 2011 and 2015, and hydrological surveys in 2015 and 2016 yrs. Maps of the fish distribution at various stages of ontogenesis were made. Cluster analysis was used to identify the structure of ichthyoplankton in the 2015 collections.Novelty. For the first time, data on ichthyoplankton collected by the SakhNIRO in the 2010s near the northern Kuril Islands are presented. The ichthyoplankton complexes of the spring 2015 are identified and their spatial location is shown.Results. Eggs and larvae of 26 fish species were identified in ichthyoplankton collection, 86 species of teleosts were noted in trawl catches. The dominant components of ichthyoplankton were the walleye pollock eggs Gadus chalcogrammus, the larvae of the Pacific sand lance Ammodytes hexapterus and the larvae of sculpins gen. Gymnocanthus. Most species abundant in ichthyoplankton were among the most significant in trawl catches. The maximum abundance of ichthyoplankton, more than 600 ind./m2, in the area of the Northern Kuril occurred at the beginning of May. The structure of ichthyoplankton in April-May of 2015–2016 was quite similar, at the level of 60–70%.Practical significance. Knowledge of the main spawning areas of commercial fish and the places of development of their early stages is an important component for making decisions on the rational use of biological resources.

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Dempsey, C. H. "Ichthyoplankton entrainment." Journal of Fish Biology 33, sa (December 1988): 93–102. http://dx.doi.org/10.1111/j.1095-8649.1988.tb05563.x.

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Basova, Marina, Svetlana Krasheninnikova, and Vincenzo Parrino. "Intra-Decadal (2012–2021) Dynamics of Spatial Ichthyoplankton Distribution in Sevastopol Bay (Black Sea) Affected by Hydrometeorological Factors." Animals 12, no. 23 (November 28, 2022): 3317. http://dx.doi.org/10.3390/ani12233317.

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High mortality of fish in the early stages of ontogenesis requires the detection of factors affecting it and is an extremely important problem. For this reason, we tried to consider the influence of some hydrometeorological factors on the intra-decadal dynamics and spatial distribution of ichthyoplankton abundance in Sevastopol Bay. To this end, we analyzed ichthyoplankton samples collected in 2012–2021 in Sevastopol Bay, and the four districts were identified. The ichthyoplankton distribution by areas was associated with the peculiarities of the pollution distribution. The maximum numbers in eggs (34.7 ± 7.5 ind. m−2) and larvae (10.0 ± 2.4 ind. m−2) were recorded in July–August. For the first time, a positive effect of temperature and repeatability of north and northeast winds on the ichthyoplankton number during the summer spawning in all identified areas of Sevastopol Bay using principal component analysis (PCA) was reported. In the southern region, positive influence of temperature and northerly winds on the ichthyoplankton abundance was confirmed by ANOVA (p = 0.02), and Pearson’s correlation analysis revealed significant correlations between these parameters on inter-annual scale (r > 0.5). In the eastern area, the discharge of rivers is an additional factor affecting the abundance of ichthyoplankton, while in the western and central areas, these factors were the wind characteristics caused by the orography peculiarities. The pollution spread in Sevastopol Bay is also largely due to the wind regime. The importance of comprehensive monitoring studies using intra-decadal data on ichthyoplankton is emphasized.

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Dos Santos, Elizângela Alves, Ana Carla Asfora El-Deir, and Jacqueline Santos Silva Cavalcanti. "Microplastics vs. ichthyoplankton: effects of this interaction in controlled and estuarine environments." STUDIES IN ENVIRONMENTAL AND ANIMAL SCIENCES 3, no. 1 (March 15, 2022): 84–102. http://dx.doi.org/10.54020/seasv3n1-006.

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This literature review exploring the relationship between microplastics and ichthyoplankton was conducted in the main databases available online, considering the period from 2007 to 2021. Sixty articles were found reporting the presence of microplastics in estuarine environments (71.7%), and ingestion by ichthyoplankton in estuarine environments (16.6%) and under experimental conditions (11.7%). The most abundant microplastic found in natural environments was fiber (55%). Environments with densities between 17.5 and 4100 particles/m³ exhibited greater possibilities of ingestion of these particles by ichthyoplankton, the smaller the microplastic particle (63 μm-0.5 mm) the greater the probability (95%) of being ingested by ichthyoplankton (>2.56 mm). Danio rerio (zebrafish) was the species commonly used to assess the effects caused by the interaction between microplastics and ichthyoplankton under experimental conditions. The effects frequently reported were: increased heart rates (25%); growth inhibition (25%); interference in larvae’s swimming speed (53.4%); and inflammation in various organs (e.g., liver, intestine) (50%).

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Silva, Patrícia Alves da, David Augusto Reynalte-Tataje, and Evoy Zaniboni-Filho. "Identification of fish nursery areas in a free tributary of an impoundment region, upper Uruguay River, Brazil." Neotropical Ichthyology 10, no. 2 (June 28, 2012): 425–38. http://dx.doi.org/10.1590/s1679-62252012005000012.

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This study aims to determine the importance of different environments of the Ligeiro River (upper Uruguay River, Brazil) in fish reproduction. For this purpose, three environments (sampling sites) were selected: rapids, a pool, and the mouth of the Ligeiro River. Ichthyoplankton, zooplankton, and benthos were sampled six times per month from September, 2006 to March, 2007. Zooplankton and ichthyoplankton samples were collected early in the evening with plankton nets (64 µm and 500 µm, respectively). Benthos samples were also collected early in the evening with a Van Veen dredge. Local abiotic variables (temperature, dissolved oxygen, pH, electrical conductivity, water speed, alkalinity, water hardness, and water transparency) were measured simultaneously with the biotic data sampling and were complemented by regional variables (water flow and precipitation). A total of 43,475 eggs and 2,269 larvae were captured. Of these larvae, 80.1% were in the pre-flexion and larval yolk stages. Digestive tract content showed that the greatest degree of repletion among the larvae in more advanced phases occurred in the pool environment. Water speed was the main characteristic used to differentiate the river's rapids and mouth from the pool. The abundance of zooplankton and benthos was not related to the distribution of densities among the different components of the ichthyoplankton. A greater abundance of eggs and larvae with yolk was found in the rapids and river mouth. Ordination analyses showed a connection between the advanced stage larvae and the pool environment. In conclusion, the rapids and river mouth of the Ligeiro River's are important locations for fish reproduction, particularly in regard to spawning and drifting of the ichthyoplankton's initial stages, whereas the pool represents a nursery place for larval growth.

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Ma, Yihong, Chongliang Zhang, Ying Xue, Yupeng Ji, Yiping Ren, and Binduo Xu. "Effects of Sampling Design on Population Abundance Estimation of Ichthyoplankton in Coastal Waters." Fishes 10, no. 2 (January 22, 2025): 39. https://doi.org/10.3390/fishes10020039.

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The abundance, spatial distribution of and dynamic changes in ichthyoplankton species affect the recruitment and fish population dynamics, which are fundamental for stock assessment and fisheries management. An evaluation of alternative sampling designs needs to be carried out to determine the optimal scheme that is cost-effective in collecting high-quality ichthyoplankton data. A simulation study was conducted to evaluate the performances and consistency of six potential sampling designs for an ichthyoplankton survey in the coastal waters of the central and southern Yellow Sea. Relative estimation error (REE) and relative bias (RB) were used to measure the performances in estimating the population abundances of five target ichthyoplankton species in different sampling designs. In general, the two systematic sampling (SYS) designs had high precision and accuracy estimation and remained stable over years for estimating the population abundance of ichthyoplankton species compared with the other four sampling designs. SYS did not result in the overestimation or underestimation of the mean population abundance. Most sampling designs showed relatively high accuracy in abundance estimation when sample sizes were higher than medium levels. This study could improve the performances of sampling designs of ichthyoplankton surveys and provide a reference for the further optimization of sampling designs.

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Jiang, Rijin, James Leonard Lusana, and Yongjiu Chen. "High-Throughput DNA Metabarcoding as an Approach for Ichthyoplankton Survey in Oujiang River Estuary, China." Diversity 14, no. 12 (December 14, 2022): 1111. http://dx.doi.org/10.3390/d14121111.

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High-throughput DNA metabarcoding of mitochondrial 12S rRNA and Cyt b gene sequences was coupled with a morphology-based identification tool to assess ichthyoplankton community structure in Oujiang River Estuary, China. The performances of 12S and Cyt b barcoding markers were compared in terms of taxonomic resolution, detection and coverage, and their suitability was established for use as a quick and powerful ichthyoplankton assessment tool. A total of 30,138 ichthyoplankton (2462 eggs and 27,676 larvae) samples were collected from April to August 2015 and identified to 145 taxa belonging to 57 families and 105 genera. June and July were the main spawning months. Ichthyoplankton were more abundant around Lingkun and Qidu Islands and the upper parts of Oujiang River Estuary. The 12S gene marker presented higher species coverage and detection rate than Cyt b. DNA metabarcoding exhibited more representative species identification power than morphology. The findings reported in this study provided a key attempt towards the development of time-efficient and cost-effective ichthyoplankton identification and assessment tool.

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Dissertations / Theses on the topic "Ichthyoplankton"

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Suntsov, andrei V. "New Data on Ichthyoplankton of the SouthWestern Pacific." W&M ScholarWorks, 1997. https://scholarworks.wm.edu/etd/1539617727.

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Álvarez, Ellacuría Itziar. "Multiscale environmental-ichthyoplankton assemblages relationships in the Balearic Sea." Doctoral thesis, Universitat de les Illes Balears, 2015. http://hdl.handle.net/10803/378037.

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Understanding the early life stages of fishes and the processes influencing their survival has been at the heart of the fisheries oceanography since the beginning of the 20th century. By focusing on spatial and temporal patterns in the ichthyoplankton (those early stages whose horizontal location is largely determined by currents), it is possible to gain some understanding of interrelationships among environmental conditions, fish spawning phase and dispersal/survival dynamics of the planktonic stages of fish. The different physical and/or biological processes controlling Larval Fish Assemblages (LFAs) variability (abundances, composition and distribution) act at very different space and time scales. Sampling the sea at the appropriate frequency and at adequate time and space scales is required to evaluate those mechanisms. These studies are insufficiently developed in the Balearic Archipelago, a hotspot for biodiversity located in an extremely dynamic area of the Mediterranean. With this premise in mind, the main objective of the thesis was to deepen in the knowledge of LFA dynamics in the Balearic Sea (NW Mediterranean) at different spatio-temporal scales. Four different approaches were addressed. At a sub-seasonal temporal scale, the influence of coastal environmental conditions during the shift from winter-spring to summer on fish larvae assemblages in a temperate area was evaluated. Larval fish assemblages were sampled fortnightly at three stations located in coastal waters off southern Mallorca from March to August 2007, covering the main spawning period for the resident coastal fish in this region. The larval fish assemblage showed clear seasonality with higher specific abundance but lower diversity in the spring, probably linked to a spatial (at the vertical scale) shift in the energy flow, which may trigger the summer spawning of many bottom-dwelling species. At the submesoscale domain, the factors that may regulate the previously suggested high levels of larval self-recruitment were explored in Cabrera National Park (CNP), an insular Marine Protected Area (MPA) located off southern Mallorca. Our study attributes the regulation of larval arrival to the MPA to a combination of retention by topographically generated circulation patterns around the island and shelf break frontal dynamics. Also at scales smaller than the mesoscale, we examined fish larval distribution drivers in Palma Bay, a large (~20 Km) wind-driven microtidal bay in the southern coast of Mallorca. Distributions and abundances of fish larvae in the Bay were analyzed and interpreted in the context of the observed circulation patterns, adult habitat distribution and spawning traits. Acoustic Doppler Current Profiler (ADCP) observations showed the presence of retentive flow patterns in the middle of the Bay enhancing local larval accumulation and self-recruitment. A multivariate approach based on Redundancy Analysis (RDA) revealed differences between the larval fish assemblages in the Bay, constituted by small pelagic and benthopelagic families (Gobiidae, Chromis chromis and Serranus hepatus) and offshore larvae, mostly from meso and large pelagic fish. These larval fish assemblages were structured according to depth variations and zooplankton abundance, and remained relatively unmixed because of the circulation patterns in the mouth of the Bay that uncouple its dynamics from alongshelf circulation. At mesoscale level, we investigated the effect of two hydrographic scenarios, representing well-known contrasting examples of the early summer mesoscale dynamics in the archipelago, on the summer larval fish assemblages during two cruises in 2004 and 2005. While depth was the most important variable in explaining the assemblage structure and diversity observed under both scenarios, indicators of mesoscale activity (dynamic height, geostrophic velocity) contributed significantly to understanding the dynamics of the larval fish community. The larval assemblage dynamics are discussed in terms of species-specific and extrinsic factors, including future consequences of potential changes in these environmental scenarios. The main results of this thesis are put together in context in a general discussion section and shortcomings and future directions are explored.<br>Desde principios del siglo veinte, el estudio de los estadios tempranos de los peces y de los procesos que influyen en su supervivencia forma parte de la oceanografía pesquera. La investigación de los patrones temporales y espaciales del ictiopláncton hace posible entender las relaciones entre las condiciones del ambiente, la fase reproductiva de los adultos y la dinámica de supervivencia y retención de los estadios planctónicos de los peces. Los diferentes procesos físicos y/o biológicos que controlan la variabilidad (abundancia, composición y distribución) en las comunidades de larvas de peces (a partir de aquí LFA, del inglés Larval Fish Assemblage) actúan a escalas espaciales y temporales muy diferentes. Se hace necesario por tanto muestrear en el mar con la frecuencia apropiada y a la escala espacio-temporal adecuada para evaluar esos mecanismos. Este tipo de estudios son escasos en el archipiélago Balear, punto de interés de la biodiversidad y situado en un área del Mediterráneo extremadamente dinámica. Teniendo todo lo anterior en cuenta, el principal objetivo de la tesis fue profundizar en el conocimiento de la dinámica de las LFA en el Mar Balear, a diferentes escalas espacio-temporales. Se realizaron cuatro aproximaciones diferentes. A escala temporal, se evaluó la influencia de las condiciones ambientales costeras durante la transición primavera temprana-verano sobre las LFAs. Se realizaron muestreos quincenales entre marzo y agosto (cubriendo el pico de puesta de la mayoría de las especies de la zona) en tres estaciones de la zona costera del sur de Mallorca. Las LFAs reflejaron claramente la estacionalidad de la zona con una alta abundancia de especies pero bajas densidades de larvas en primavera, probablemente relacionada con la transición espacial (en el plano vertical) del flujo de energía que seguramente desencadena la puesta estival de muchas de las especies cercanas al fondo. A una escala menor que mesoescala, se estudiaron los factores que regulan los altos niveles de auto reclutamiento previamente sugeridos para el Parque Nacional de Cabrera. Nuestro estudio atribuye la regulación de la llegada de larvas al área a una combinación de retención por los patrones de circulación generados por la topografía alrededor de Mallorca y la dinámica asociada a un frente de plataforma. También a escala inferior a la mesoescala, examinamos los agentes responsables de la distribución de LFAs en la bahía de Palma en la costa sur de Mallorca. Se analizaron e interpretaron la abundancia y distribución horizontal de las larvas de peces en la bahía en el contexto de los patrones de circulación observados, el hábitat de los adultos y las estrategias de puesta. Mediante observaciones de un perfilador de corrientes mediante Doppler, se describió la presencia de patrones retentivos de circulación en el medio de la bahía que favorecen la acumulación de larvas locales y el auto reclutamiento. Una aproximación multivariante basada en el análisis de redundancia (RDA) reveló diferencias entre la comunidad de la bahía formada por familias bentopelágicas y de pequeños pelágicos y una LFA de especies más lejanas a la costa, principalmente mesopelágicos y grandes pelágicos. Esas comunidades estaban estructuradas según variaciones en profundidad de abundancia de zooplancton y permanecían relativamente separadas debido a que los patrones de circulación a la entrada de la bahía separan su dinámica interna de la circulación en la plataforma. A nivel de mesoescala investigamos mediante dos campañas en años consecutivos el efecto que ejercen dos escenarios hidrográficos (que representan ejemplos de escenarios muy contrastados entre sí característicos de la dinámica de mesosescala en verano en el archipiélago) sobre las LFAs estivales en la zona. Bajo ambos escenarios, la profundidad resultó ser la variable que mejor explicaba la estructura de la comunidad y su diversidad. Aun así, los indicadores de actividad mesoescalar (altura dinámica, velocidad geostrófica) contribuyeron de manera significativa a entender la dinámica de las LFAs. Los principales resultados de esta tesis se tratan como conjunto en una discusión general final donde también se comentan las limitaciones y se exploran las posibilidades de futuro.<br>Des de principis del segle vint, l’estudi dels estadis primerencs dels peixos i dels processos que influeixen en la seva supervivència forma part de l’oceanografia pesquera. La recerca dels patrons temporals i espacials del ictioplàncton fa possible entendre les relacions entre les condicions de l’ambient, la fase reproductiva dels adults i la dinàmica de supervivència i retenció dels estadis planctònics dels peixos. Els diferents processos físics i biològics que controlen la variabilitat (abundància, composició i distribució) en les comunitats de larves de peixos (d’aquí endavant LFA, de l’anglès larval Fish Assemblage) actuen a escales espacials i temporals molt diferents. Es fa necessari per tant mostrejar la mar amb la freqüència adient i a la escala espaitemporal adequada per avaluar aquests mecanismes. Aquest tipus d’estudi son escassos a les Illes Balears, punt d’interès de la biodiversitat i situades a un àrea de la Mediterrània extremadament dinàmica. Amb tot lo anterior en ment, l’objectiu principal d’aquesta tesi va ser augmentar el coneixement de la dinàmica de les LFA a la Mar Balear, a diferents escales espai-temporals. Es varen realitzar quatre aproximacions diferents. A l’escala temporal, es va avaluar la influencia de les condicions ambientals costaneres durant la transició primavera-estiu sobre les LFAs. Es varen realitzar mostreigs quinzenals de març a agost (pic de posta de la majoria de les especies de la zona) a tres estacions costaneres del sud de Mallorca. Les LFAs varen reflectir clarament la estacionalitat de la zona amb una alta abundància d’espècies però amb baixes densitats de larves a la primavera amb molta probabilitat relacionada amb la transició espacial (dins del pla vertical) del flux d’energia que segurament desencadena la posta estival de moltes especies properes al fons. A una escala menor que la mesoescala, es varen estudiar els factors que regulen els alts nivells de auto reclutament prèviament suggerits per el Parc Nacional de Cabrera. El nostre estudi atribueix la regulació de l’arribada de larves al àrea a una combinació de retenció pels patrons de circulació generats per la topografia al voltant de Mallorca i la dinàmica associada a un front de plataforma. També a escala inferior a mesoescala, vàrem examinar els agents responsables de la distribució del LFA a la badia de Palma a la costa sud de Mallorca. Es varen analitzar i interpretar la abundància i distribució horitzontal de les larves de peixos a la badia en el context dels patrons de circulació observats, l’habitat dels adults i les estratègies de posta. Mitjançant observacions amb un perfilador de corrents Doppler es va descriure la presencia de patrons retentius de circulació al mig de la badia que afavoreixen la acumulació de larves locals i el auto reclutament. Una aproximació multivariant basada en l’anàlisi de redundàncies (RDA) va revelar diferencies entre la comunitat de la badia formada per famílies bentopelàgiques i de petits pelàgics i una LFA d’espècies mes allunyades de costa, principalment mesopelàgics i grans pelàgics. Aquestes comunitats estaven estructurades segons variacions en profunditat de abundància de zooplàncton i romanien relativament separades degut a que els patrons de circulació a l’entrada de la badia separen la seva dinàmica interna de la circulació a la plataforma. A nivell de mesoescala vàrem investigar mitjançant dues campanyes a anys consecutius l’efecte que exerceixen dos escenaris hidrogràfics (que representen exemples d’escenaris molt contrastats l’un de l’altre característics de la dinàmica de mesoscale a l’estiu a l’arxipèlag) sobre les LFAs estiuenques a la zona. Sota ambdós escenaris, la fondària va resultar ésser la variable que millor explicava l’estructura de la comunitat i la seva diversitat. Tot i això, els indicadors d’activitat mesoscalar (alçada dinàmica i velocitat geostrofica) varen contribuir se manera significativa a entendre la dinàmica de les LFAs. Els principals resultat d’aquesta tesi es tracten com a conjunt a una discussió general final on també es comenten les limitacions i s’exploren les possibilitats de futur.

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Situ, Yingyi. "Ichthyoplankton assemblage at Cape d'Aguilar seasonal variability and family composition /." Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/hkuto/record/B38993387.

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Situ, Yingyi, and 司徒穎宜. "Ichthyoplankton assemblage at Cape d'Aguilar: seasonal variability and family composition." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B38993387.

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Omar, Othman Abdu Hashim. "Abundance and distribution of Ichthyoplankton in the Firth of Forth, Scotland." Thesis, Heriot-Watt University, 1988. http://hdl.handle.net/10399/963.

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Kruger, Michelle. "Spatio-temporal dynamics of ichthyoplankton in the Kowie estuary, South Africa." Thesis, Rhodes University, 2010. http://hdl.handle.net/10962/d1005164.

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Ichthyoplankton dynamics in the permanently open Kowie Estuary, in the warm temperate region of South Africa was investigated. The composition, abundance, distribution and seasonality of larval fishes were studied over a two year period between 2004 and 2006. Additionally, tidal exchange of ichthyoplankton and the use of frontal zones in the mouth region of the estuary were also explored between 2008 and 2009. Temporal and spatial trends in occurrence of larval fishes within the estuary and associated marina were obtained from data collected seasonally using boat-based plankton netting at 14 sampling stations along the length of the estuary. A total of 11 128 larval fishes were collected, representing 23 families and 38 taxa. Clupeidae and Gobiidae were the dominant fish families, contributing 47.0 % and 24.7 % respectively to the total catch. Estuarine resident species dominated the overall catch (91 %). A notable absence of older stage larvae and early juveniles characterised the artificial channels of the marina and estuary mouth region. This was attributed to the absence of a shallow, marginal water habitat typical of successful estuarine nursery areas. Tidal exchange of larval fishes was investigated in the Kowie Estuary using a new technique. A set of drifting light traps were set repetitively on the ebb and flood tide every second night for two consecutive 14 day periods during the peak estuarine recruitment period. A total of 553 larval fishes were caught during the study, representing nine families and 26 species. Blenniidae and Clupeidae dominated the catches. Family and species occurrence changed with tide state. Species richness (d) and diversity (H’) varied with tide and was highest on flood tides. Estuary-dependent species, such as Omobranchus woodii were more dominant on flood tides, whilst larvae of marine-spawned species, such as Sardinops sagax, were dominant on the ebb tide. Light trap catches yielded a different composition in terms of development stage / size and species, when compared to towed net studies. Towed plankton nets were again used to study the shear fronts that characterise the mouth region of the canalised Kowie Estuary. It was hypothesised that the convergence zone of the front provides feeding opportunities for ichthyoplankton. Ichthyoplankton, zooplankton and phytoplankton was collected from within and immediately outside of the convergence zone during frontal conditions. Species specific distribution trends emerged from this study. Postflexion larvae and early juvenile stages of the estuary dependent Mugilidae were only present in the foam line of the convergence zones. Some known predators of ichthyoplankton were also present in slightly higher numbers in the convergence zone (isopods) while other predators such as mysid shrimps, chaetognaths and cnidarians were more abundant out of the convergence zone. It appears that these zones may provide access to temporary food patches in the lower estuary but will be accompanied by a trade-off with increased isopod predators. The Kowie Estuary is a heavily impacted system and lack of adequate freshwater supply; artificial channelling and pollution ultimately have a negative impact of the success of this system as a nursery area. Rehabilitation of marginal areas in the lower estuary and marina is suggested as remedial action to re-establish the integrity of the nursery function this system could offer.

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Goodman, Benjamin Joseph. "Ichthyoplankton density and Shovelnose sturgeon spawning in relation to varying discharge treatments." Thesis, Montana State University, 2009. http://etd.lib.montana.edu/etd/2009/goodman/GoodmanB0809.pdf.

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Many lotic fish species use natural patterns of variation in discharge and water temperature as spawning cues and these natural patterns are often altered by river regulation. The effects of spring discharge and water temperature variation on the spawning of shovelnose sturgeon Scaphirhynchus platorynchus and other fishes in the upper Missouri River have not been well documented. In 2006, 2007, and 2008, I had the unique opportunity to study the effects of experimental discharge levels on ichthyoplankton density in the lower Marias River, a regulated tributary to the upper Missouri River. The objective of this study was to evaluate the effects of contrasting discharge treatments and water temperature variation on spatial and temporal variation in spawning of shovelnose sturgeon (and other species sampled as bycatch) as measured by embryonic and larval fish density in the lower Marias River. Ichthyoplankton was sampled about every four days in June and July of 2006, 2007, and 2008. Overall larval fish density was greater in 2006 than in 2007, and increased density was associated with increased discharge in 2006. In 2006, shovelnose sturgeon spawning occurred in the Marias River in conjunction with the ascending, peak (134 m 3/s), and descending portions of the spring hydrograph and water temperatures from 16 oC to 19 oC. No evidence of sturgeon spawning was documented in the lower Marias River in 2007 when peak discharge remained low (9 m 3/s to 14 m 3/s) despite the occurrence of water temperatures suitable for shovelnose sturgeon embryo development. In 2008, shovelnose sturgeon spawning occurred in conjunction with the peak (118 m 3/s) and descending portions of the spring hydrograph, and during a prolonged period of increased discharge (28 m 3/s to 39 m 3/s), coupled with water temperatures from 11 oC to 23 oC in the lower Marias River. These data suggest that discharge must reach a threshold level (28 m 3/s), and should be coupled with water temperatures suitable (12 oC to 24 oC) or optimal (16 oC to 20 oC) for shovelnose sturgeon embryo development, to provide a spawning cue to shovelnose sturgeon in the lower Marias River.

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Marko, Lisa Marie. "Ichthyoplankton of the Lower Columbia River Estuary in relation to environmental variables." Online access for everyone, 2008. http://www.dissertations.wsu.edu/Thesis/Summer2008/l_marko_073108.pdf.

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Richardson, David Earl. "Physical and Biological Characteristics of Billfish Spawning Habitat in the Straits of Florida." Scholarly Repository, 2008. http://scholarlyrepository.miami.edu/oa_dissertations/26.

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The objective of this dissertation was to examine sailfish (Istiophorus platypterus) and blue marlin (Makaira nigricans) spawning in the Straits of Florida, with a specific focus on 1) the physical and biological characteristics of the spawning environment, and 2) the role of the region within the broader spawning patterns of these two species. In order to accomplish these objectives, two years of monthly ichthyoplankton collections and physical measurements across the Straits of Florida were combined with a finer-scale Lagrangian study. Additionally, a molecular species-identification methodology was developed that was both high-throughput and suitable for use with a broad taxonomic range of species. An initial analysis considered the diversity, assemblages and associated habitat of the larvae of large and medium size pelagic species. In total 36 species and 14,295 individuals were collected during this study, with the highest diversity occurring during the summer, and in the western frontal region of the Florida Current. Sailfish were included in an assemblage with Auxis rochei, A. thazard and Euthynnus alleterattus, all species found in highest abundance during the summer along the western edge of the Straits of Florida. Blue marlin grouped most closely with Thunnus atlanticus, Ruvettus pretiosus and Lampris guttatus, all summer spawners, whose larvae tended to occur further offshore. The primary environmental factors associated with these assemblages were SST (highest summer-early fall), day-length (highest early summer), thermocline depth (shallowest on the Florida side) and fluorescence (highest on the Florida side). A Lagrangian sampling effort was then used to more specifically evaluate the role of frontal zones in sailfish spawning. The results of this sampling indicated that the highest levels of sailfish spawning occurred in a frontal zone associated with the formation of a submesoscale frontal eddy. This spawning resulted in the first-feeding larvae occupying an area rich in prey items. Given the small spatial-scale of the front, and the distribution of the eggs of adult prey items, the results of this work would suggest that sailfish are actively targeting features for spawning that are favorable to the growth and survival of their larvae. Finally the relative importance of the Straits of Florida as a spawning ground was evaluated by calculating the annual egg production of both sailfish and blue marlin within this region. In total it was estimated that 2.1% of western Atlantic sailfish spawning and 1.6% of Atlantic wide blue marlin spawning occurs in the SF. Pop-up satellite tags deployed on sailfish at the start of the spawning season revealed their short residency times in the SF, suggesting that a large (≈10%) transient portion of the sailfish population is responsible for the SF egg production. These results indicate that the SF is a migratory bottleneck for sailfish. In conclusion the results of this study indicate that a hierarchy of physical and biological processes influence the distribution of billfish spawning in space and time. The results provide insights into the movement patterns and life history strategies of these species, and ultimately may aid in the development of the spatially explicit ecosystem based management approaches that are currently being advocated.

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Hawes, Steven Maxwell. "Modelling reef fish connectivity: Investigating the biological mechanisms that influence connectivity patterns." Thesis, The University of Sydney, 2018. http://hdl.handle.net/2123/19662.

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Biophysical dispersal models (BDMs) — a hydrodynamic model coupled with a biological model — lend themselves to inferring potential connectivity patterns, as experimental studies using current methods are inherently difficult over extended spatial and temporal scales. This thesis explored the biological processes that affect the connectivity patterns of ichthyoplankton using four related data chapters. The first data chapter, a meta-analysis of connectivity studies using BDMs, investigated both trends and consequences of modelling choices on derived connectivity patterns. The results of this meta-analysis provide a useful framework on parameter choice for future consideration of connectivity studies. The second data chapter is an experiment measuring the ontogenetic vertical migration of reef fish off the coast of south-eastern Australia. The ichthyoplankton sampled demonstrated deeper migration with both increasing ontogenetic stage and length. The third data chapter is a theoretical modelling chapter that investigated the effect of different swimming and migration behaviours and differences in the parameterisation and implementation of vertical migration in a BDM. The fourth data chapter synthesised the results from the previous three data chapters and explored the predicted connectivity patterns of an endemic and threatened Australian reef fish, the black cod (Epinephelus daemelii) using a BDM. E. daemelii larvae showed strong connections to both the natal and proximate regions. Within the context of the current marine protected area (MPA) network of NSW, strong settlement regions had only moderate or no no-take areas. The results of this thesis increase our understanding of the influence of behaviour on the dispersal patterns of marine larvae along the east Australian coast.

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Books on the topic "Ichthyoplankton"

1

Mier, Kathryn L. Comparisons of Soviet and United States ichthyoplankton sampling. Seattle, WA (7600 Sand Point Way NE, Seattle 98115-0070): Alaska Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration, 1994.

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Mier, Kathryn L. Comparisons of Soviet and United States ichthyoplankton sampling. [Seattle, Wash.]: Alaska Fisheries Science Center, National Marine Fisheries Service, U.S. Dept. of Commerce, 1994.

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W, Derrah C., O'Connell Victoria M, and Alaska Fisheries Science Center (U.S.), eds. Ichthyoplankton in the eastern Gulf of Alaska, May 1990. [Seattle, Wash.]: U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, National Marine Fisheries Service, Alaska Fisheries Science Center, 1997.

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R, Dunn Jean, ed. Ichthyoplankton of the continental shelf near Kodiak Island, Alaska. Seattle, WA: U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, National Marine Fisheries Service, 1985.

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1972-, Taylor N., Plaice and Cod Egg Survey., Planning Group on North Sea Cod and Plaice Egg Surveys in the North Sea., and International Council for the Exploration of the Sea., eds. Results of the spring 2004 North Sea ichthyoplankton surveys: The distribution of fish eggs and larvae from the international ichthyoplankton survey. Copenhagen, Denmark: International Council for the Exploration of the Sea, 2007.

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Boehlert, George W. Ichthyoplankton vertical distributions near Oahu, Hawaii, 1985-1986: Data report. [La Jolla, Calif.]: U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, National Marine Fisheries Service, Southwest Fisheries Science Center, 1996.

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Tamoikine, M. Y. Ichthyoplankton study in Guinean and Senegalese coastal and estuarine waters. Paris: Unesco, 1994.

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T, Ozawa, ed. Studies on the oceanic ichthyoplankton in the Western North Pacific. Fukuoka-shi, Japan: Kyushu University Press, 1986.

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Southeast Fisheries Center (U.S.). Beaufort Laboratory, ed. Abundance and distribution of ichthyoplankton in Florida Bay and adjacent waters. Homestead, Fla: Everglades National Park, South Florida Research Center, 1987.

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E, Robbins Roger, ed. Ichthyoplankton adjacent to live-bottom habitats in Onslow Bay, North Carolina. Seattle, Wash: U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, National Marine Fisheries Service, Scientific Publications Office, 1998.

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Book chapters on the topic "Ichthyoplankton"

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Able, Kenneth W. "Ichthyoplankton." In Encyclopedia of Estuaries, 360. Dordrecht: Springer Netherlands, 2015. http://dx.doi.org/10.1007/978-94-017-8801-4_289.

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Scherer, Michael D. "The Ichthyoplankton of Cape Cod Bay." In Lecture Notes on Coastal and Estuarine Studies, 151–90. New York, Inc.: Springer-Verlag, 2013. http://dx.doi.org/10.1029/ln011p0151.

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Mandić, Milica, Ines Peraš, Slađana Gvozdenović, Branislav Gloginja, and Barbara Zorica. "Summer Assemblage of Ichthyoplankton in South-Eastern Adriatic Sea." In The Handbook of Environmental Chemistry, 129–51. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/698_2020_708.

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Acha, Eduardo M., Martin D. Ehrlich, José H. Muelbert, Marcelo Pájaro, Daniel Bruno, Laura Machinandiarena, and Mariana Cadaveira. "Ichthyoplankton Associated to the Frontal Regions of the Southwestern Atlantic." In Plankton Ecology of the Southwestern Atlantic, 219–46. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-77869-3_11.

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Mandić, Milica, Ana Pešić, Mirko Đurović, Aleksandar Joksimović, and Slobodan Regner. "Composition and Distribution of Ichthyoplankton in the Boka Kotorska Bay." In The Handbook of Environmental Chemistry, 295–312. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/698_2016_28.

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Cepeda, Georgina D., Martín D. Ehrlich, Carla M. Derisio, Ayelén Severo, Laura Machinandiarena, Mariana Cadaveira, Paola Betti, Marina Do Souto, Carolina Pantano, and E. Marcelo Acha. "Zooplanktonic Crustacea and Ichthyoplankton of the Patagonian Shelf-Break Front." In Aquatic Ecology Series, 73–96. Cham: Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-71190-9_4.

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de Lafontaine, Yves. "Ichthyoplankton communities in the St. Lawrence Estuary: Composition and dynamics." In Coastal and Estuarine Studies, 321–43. Washington, D. C.: American Geophysical Union, 1990. http://dx.doi.org/10.1029/ce039p0321.

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Lafontaine, Yves. "Ichthyoplankton Communities in the St. Lawrence Estuary: Composition and Dynamics." In Oceanography of a Large-Scale Estuarine System, 321–43. New York, NY: Springer New York, 1990. http://dx.doi.org/10.1007/978-1-4615-7534-4_14.

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de A.Silva, Michel, Daniela Queiroz Trevisan, David N. Prata, Elineide E. Marques, Marcelo Lisboa, and Monica Prata. "Exploring an Ichthyoplankton Database from a Freshwater Reservoir in Legal Amazon." In Advanced Data Mining and Applications, 384–95. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-53917-6_34.

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Hubold, G. "Seasonal Patterns of Ichthyoplankton Distribution and Abundance in the Southern Weddell Sea." In Antarctic Ecosystems, 149–58. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-84074-6_15.

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Conference papers on the topic "Ichthyoplankton"

1

Tsechpenakis, G., C. Guigand, and R. K. Cowen. "Image Analysis Techniques to Accompany a new In Situ Ichthyoplankton Imaging System." In OCEANS 2007 - Europe. IEEE, 2007. http://dx.doi.org/10.1109/oceanse.2007.4302271.

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Ahsan, Quamrul, Alan F. Blumberg, Dennis Dunning, Honghai Li, Imali D. Kaluarachchi, Doug Heimbuch, and Dennis Logan. "Predicting Entrainment of Ichthyoplankton at a Power Plant Intake on the East River, NY." In World Water and Environmental Resources Congress 2003. Reston, VA: American Society of Civil Engineers, 2003. http://dx.doi.org/10.1061/40685(2003)227.

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Reports on the topic "Ichthyoplankton"

1

de Boois, I. J., and C. J. G. van Damme. Factsheet: Research surveys ichthyoplankton Atlantic (Survey_plankton_Atlantic). Stichting Wageningen Research, Centrum voor Visserijonderzoek (CVO), 2023. http://dx.doi.org/10.18174/634034.

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de Boois, I. J., and C. J. G. van Damme. Factsheet: Research surveys ichthyoplankton North Sea (Survey_plankton_NorthSea). Stichting Wageningen Research, Centrum voor Visserijonderzoek (CVO), 2023. http://dx.doi.org/10.18174/634035.

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Paller, M. H., R. C. Tuckfield, and W. M. Starkel. Statistical methods for detecting ichthyoplankton density patterns that influence entrainment mortality. Office of Scientific and Technical Information (OSTI), December 1995. http://dx.doi.org/10.2172/221923.

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Paller, M. Ichthyoplankton entrainment study at the SRS Savannah River water intakes for Westinghouse Savannah River Company. Office of Scientific and Technical Information (OSTI), March 1992. http://dx.doi.org/10.2172/7177198.

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Paller, M. Ichthyoplankton entrainment study at the SRS Savannah River water intakes for Westinghouse Savannah River Company. Final report. Office of Scientific and Technical Information (OSTI), March 1992. http://dx.doi.org/10.2172/10186395.

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Listmann, Luisa. Bachelor MARSYS education cruise in the Baltic Sea, Cruise No. AL608, 1st of March 2024 to 10th of March 2024, Kiel (Germany) - MARSYS. GEOMAR Helmholtz Centre for Ocean Research Kiel, Germany, 2024. http://dx.doi.org/10.3289/cr_al608.

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This cruise was planned as a teaching cruise for bachelor students of the Institute of Marine Ecosystem and Fisheries Sciences (IMF) to learn the most commonly used scientific methods, gears and working procedures of fisheries science and biological oceanography on board of a research vessel. One objective was to investigate the distribution patterns of certain fish species such as cod, whiting, sprat and herring in the Kiel Bight, Mecklenburg Bight with a focus on juvenile gadeid species. Another objective were zooplankton and hydrological surveys for which plankton stations were sampled along the cruise track to gain insights into the spatial distribution of zoo- and ichthyoplankton. All necessary educational content could be taught. The rest of the analysis was partly done in the form of Bachelor or Master theses as well as in the courses taught at IMF. (Alkor-Berichte ; AL608)

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Paller, M. H. The influence of Savannah River discharge and changing SRS cooling water requirements on the potential entrainment of ichthyoplankton at the SRS Savannah River intakes. Office of Scientific and Technical Information (OSTI), August 1992. http://dx.doi.org/10.2172/6723881.

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Paller, M. H. The influence of Savannah River discharge and changing SRS cooling water requirements on the potential entrainment of ichthyoplankton at the SRS Savannah River intakes. Office of Scientific and Technical Information (OSTI), August 1992. http://dx.doi.org/10.2172/10124177.

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Listmann, Luisa. Bachelor MARSYS education cruise in the Baltic Sea, Cruise No. AL598, 27th of July 2023 to 6 th of August 2023, Kiel (Germany) - MARSYS. IMF Institute for Marine Ecosystem and Fishery Science, Hamburg, 2023. http://dx.doi.org/10.3289/cr_al598.

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This cruise was planned as a teaching cruise for bachelor students of the Institute of Marine Ecosystem and Fisheries Sciences (IMF) to learn the most commonly used scientific methods, gears and working procedures of fisheries science and biological oceanography on board of a research vessel. One objective was to investigate the distribution patterns of certain fish species such as cod, whiting, sprat and herring in the Kiel Bight, Mecklenburg Bight with a focus on juvenile gadeid species. Another objective were zooplankton and hydrological surveys for which plankton stations were sampled along the cruise track to gain insights into the spatial distribution of zoo- and ichthyoplankton. All necessary educational content could be taught including on board qualitative assessement of zooplankton distribution both in the Arkona and Mecklenburg Basin. The rest of the analysis will be partly done in the form of Bachelor or Master theses as well as in the context of doctoral theses. (Alkor-Berichte, AL598)

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Listmann, Luisa, Steffen Funk, and Richard Klinger. Bachelor MARSYS education cruise in the Baltic Sea, Cruise No. AL569, 2nd of March 2022-6th of March 2022, Kiel (Germany) - MARSYS. IFM Institute for Marine Ecosystem and Fishery Science, Hamburg, 2022. http://dx.doi.org/10.3289/cr_al569.

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This cruise was planned as a teaching cruise for bachelor students of the Institute of Marine Ecosystem and Fisheries Sciences (IMF) to learn the most commonly used scientific methods, gears and working procedures of fisheries science and biological oceanography on board of a research vessel. The main scientific objective was to investigate the distribution patterns of certain fish species such as cod, whiting, sprat and herring in the Kiel Bight, Mecklenburg Bight, Arkona and Born- holm Basin. Besides fisheries and hydrological surveys, plankton stations were sampled along the cruise track to gain insights into the spatial distribution of zoo- and ichthyoplankton, as well as fish eggs. All necessary educational content could be taught and despite unforeseen Covid 19 conditions and the resulting changes in the cruise program, some sample and data material could be col-lected. The analysis of the data will be partly done in the form of module theses as well as in the context of doctoral theses. (Alkor-Berichte, AL569)

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