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1
Hoolihan, John P. "Biology of Arabian Gulf sailfish". Connect to this title online, 2005. http://www.library.unsw.edu.au/%7Ethesis/adt-NUN/public/adt-NUN20050607.184544/.
Testo completo
2
Hoolihan, John Paul Jr School of Biological Earth & Environmental Sciences UNSW. "Biology of Arabian Gulf sailfish". Awarded by:University of New South Wales. School of Biological, Earth and Environmental Sciences, 2005. http://handle.unsw.edu.au/1959.4/20755.
Testo completoAbstract (sommario):
Biological and life history characteristics for a previously unstudied population of sailfish, Istiophorus platypterus, in the Arabian Gulf were investigated. Notable findings include temporal-spatial migration patterns for a genetically isolated population that is threatened by overexploitation. Conventional tagging resulted in 2053 releases and 114 recaptures (5.55%) inside the Gulf. Linear displacement ranged from 2.5 to 697 km, while days at liberty ranged from 17 to 818 days. Dead recoveries in Iranian gillnets account for 88.6% of recaptures. Modeling analyses produced a best estimate of annual survival probability (S) at 0.375 (slope = -0.101, SE = 0.324). Fifteen pop-up satellite archival tags were deployed on sailfish during 2001 - 2002 to track temporal and spatial movements. Extensive data from four tags showed 83.7% of time-at-depth was spent above 10 m with no significant difference (P < 0.05) in diel preference. Depth ranged from 0.0 m to 61.0 m, while temperature ranged from 19.7 ??C to 30.1 ??C. Small-scale movements of eight sailfish were measured using ultrasonic tracking for periods ranging from 3:33 to 53:06 hours. Track distances ranged from 5.5 to 78.5 km, while linear displacement ranged from 4.6 to 37.0 km. Average speed ranged from 0.29 to 0.75 m s-1. Vertical distributions showed 84.3% of time was spent above 10 m depth, even though water temperature showed negligible variation with depth. Mitochondrial DNA comparison of 147 sailfish produced 39 composite haplotypes using eight restriction enzymes. Significant differences occurred in the frequency between population groups inside and outside the Gulf (amova 34.8%, P < 0.01; FST = 0.356), along with evidence of restricted migration between them (average number of migrants, Nm = 0.903). Nine year classes (0-8) were determined from aging analysis of fin spines. Females (n = 50) ranged from 0 to 8 years, while males (n = 34) ranged from 0 to 6 years. Von Bertalanffy growth function indicated rapid growth during the first two years, after which males stabilized and females continued growing to a greater maximum mean length and weight. A comparison of allometric growth between sexes indicated no significant difference between length and other morphometric characters (P ranged 0.135 ??? 0.980).
3
Bangma, Jessica. "Contemporary population structure and historical demography of sailfish (Istiophorus platypterus) in the Atlantic Ocean". [College Station, Tex. : Texas A&M University, 2006. http://hdl.handle.net/1969.1/ETD-TAMU-1876.
Testo completo
4
McDowell, Jan Renee. "Genetic stock structure of the sailfish, Istiophorus platypterus, based on nuclear and mitochondrial DNA". W&M ScholarWorks, 2002. https://scholarworks.wm.edu/etd/1539616769.
Testo completoAbstract (sommario):
The results of life history studies involving the sailfish, Istiophorus platypterus, from the Atlantic, Pacific, and Indian oceans were reviewed. Results of studies agree on several aspects of sailfish biology; sailfish exhibit opportunistic feeding behavior, follow the 28??C isotherm, spawn in summer mature at approximately age 3, and are the least migratory of the billfishes. However, results are in conflict concerning sex ratio and whether sailfish are single or multiple spawners. Although many researchers have reported that sailfish are sexually dimorphic, their fragile otoliths make them difficult to age, aging studies have not been validated, and sexual dimorphism has not been adequately separated from differences in age at first maturity. Life history studies are further compromised because identification of early life history stages is difficult and effect of genetically distinct stocks on these studies is unknown. Molecular markers representing a range of genetic resolution were used to investigate the genetic stock structure of the sailfish within and between oceans and to discriminate sailfish from other istiophorid billfishes. to investigate the genetic basis of stock structure, a 1700 by region of mitochondria) DNA which included the control region, was surveyed with five restriction endonucleases and representative individuals were sequenced. In addition, five nuclear microsatellite loci were assayed. Approximately 647 sailfish were collected from throughout the species' range over a six-year period from the Atlantic, Pacific, and Indian Oceans. Both mitochondrial and nuclear markers found that Atlantic, eastern Pacific, and Indo-west Pacific sailfish represent distinct genetic stocks. In addition, mitochondrial data revealed the presence of diverse clades, which were probably formed during Pleistocene glaciation. Independent molecular markers based on mitochondrial and nuclear DNA were developed to provide positive identification of istiophorid and xiphiid billfishes. Both classes of markers are based on amplification of short segments (<1.7 kb) of DNA and subsequent digestion with informative restriction endonucleases. ND4 and MN32-2, the selected markers, allow unambiguous specific identification, although it was not possible to differentiate white marlin and striped marlin. The resulting keys provide two independent means for the forensic identification of fillets and for specific identification of early life history stages.
5
Wor, Lima Catarina. "Evaluating the Impact of Stock Structure Uncertainty in Stock Assessments of Sailfish in the Atlantic Ocean". W&M ScholarWorks, 2012. https://scholarworks.wm.edu/etd/1539617923.
Testo completo
6
Martins, Osvandre Alves. "Sailfish-SRA : uma arquitetura de referência de software para suporte ao compartilhamento de informações na tomada de decisões colaborativas em aeroportos". Instituto Tecnológico de Aeronáutica, 2011. http://www.bd.bibl.ita.br/tde_busca/arquivo.php?codArquivo=1910.
Testo completoAbstract (sommario):
Sistemas grandes, complexos e críticos, como os Sistemas de Gerenciamento de Tráfego Aéreo, apresentam-se cada vez mais intensivos em software, justificando a importância e a necessidade de se garantir a qualidade deste elemento considerado chave. Projetos de arquiteturas de software contribuem para a obtenção de índices de qualidade mais elevados, incorrem em ganhos de produtividade e propiciam a redução de custos associados ao seu ciclo de vida. Arquiteturas de Referência consideram Padrões Arquiteturais e Modelos de Referência para proverem orientações ao projeto de sistemas em um domínio ou famílias de produtos, possibilitando elaborações a partir de bases e estágios mais avançados. A principal contribuição deste trabalho refere-se à Sailfish - Software Reference Architecture (Sailfish-SRA), uma Arquitetura de Referência destinada a auxiliar a elaboração de soluções em software para o suporte ao compartilhamento de informações, quando do projeto de ferramentas para apoio aos processos de conceitos operacionais, baseado na filosofia de Tomada de Decisão Colaborativa e aplicável ao contexto de aeroportos. Sua concepção considerou padrões e modelos relacionados aos conceitos de Sistema de Sistemas e Software como Serviço, procurando manter o alinhamento com os objetivos de programas atuais de modernização dos Sistemas de Gerenciamento de Tráfego Aéreo, principalmente, com o conceito de Sistema Amplo de Gerenciamento de Informações. Este conceito, conhecido em Inglês como System Wide Information Management (SWIM), encontra-se em fase de implementação e tem demandado uma série de desafios, às comunidades científicas; e tecnológicas, quanto a forma como os diversos sistemas deste domínio serão integrados no futuro. Além de conceitos relacionados à elaboração de arquiteturas e à integração de sistemas de software, as primeiras partes deste trabalho apresentam os principais conceitos operacionais sobre a Tomada de Decisões Colaborativas em Aeroportos e as suas necessidades comuns quanto ao compartilhamento de informações Apresentam-se, também, os resultados de uma investigação sobre modelos e padrões aplicáveis à implementação do conceito de SWIM. Constitui-se, então, um conjunto de direcionadores para a Arquitetura de Referência cuja descrição é concluída por meio da apresentação de visões que conformam com pontos de vista especificados. Apresentam-se e discutem-se, também, os resultados de uma análise qualitativa da Sailfish-SRA, realizada com base em seus elementos descritivos e com o intuito de indicar o nível de conformidade e alinhamento com os seus direcionadores e com Atributos de Qualidade esperados em soluções de suporte ao compartilhamento de informações nos Sistemas de Gerenciamento de Tráfego Aéreo planejados para as próximas décadas.
7
Nguyen, Anh Khoa. "Návrh rozvoje internacionalizační strategie strategie podniku". Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2015. http://www.nusl.cz/ntk/nusl-234348.
Testo completoAbstract (sommario):
Diplomová práce je zaměřená na návrh nejvhodnější podnikové strategie pro vstup Jolly na Český trh chytrých zařízení. Rozbor teorie internacionalizace a internacionalizačních podnikových strategií je důležitým podkladem pro analýzu procesu vstupu Jolly. Na konci se zaměření přesune na návrh přijatelné strategie pro vstup a činnost na trhu.
8
Nee, Amanda. "Undersökning av alternativ för virtualisering av Android på SailfishOS". Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-254397.
Testo completoAbstract (sommario):
This report documents the result of an attempt to port the virtual android environment Anbox to the smart phone operating system SailfishOS. The purpose of the project is to see if such a solution can make SailfishOS and similar operating systems useful in a society that indirectly requires you to be able to run Android or iOS applications on your phone. The result of the project makes a number of short comings clear in the SailfishOs platform which hindered an actual attempt to evaluate the compatibility between Anbox and SailfishOS.Denna rapport redovisar resultatet från ett försök att portera den virtuella androidmiljön Anbox till det telefoninriktade operativsystemet SailfishOS. Detta görs för att uppskatta om en sådan lösning kan få SailfishOS och liknande operativsystem användbara i dagligt bruk i dagens samhälle som har ett indirekt krav på att man ska kunna köra Android eller iOS appar. Resultatet visar på begränsningar som SailfishOS-plattformen har idag vilket hindrade en ordentligt granskning av kompatibiliteten mellan Anbox och SailfishOS att genomföras.
9
Marecaux, Emily N. "Effects of potassium permanganate on the sailfin molly, Poecilia latipinna, at varying salinity levels". [Gainesville, Fla.] : University of Florida, 2006. http://purl.fcla.edu/fcla/etd/UFE0013398.
Testo completo
10
Bornhoeft, Sarah C. "Influence of Experimental Sheet Flow on Aquatic Foods Webs of the Central Everglades". FIU Digital Commons, 2016. http://digitalcommons.fiu.edu/etd/2562.
Testo completoAbstract (sommario):
Establishing historical water velocities is a goal of Everglades restoration because of their role maintaining landscape topographic relief. However, flows may also change the trophic state of marshes by phosphorus loading. I used fatty acid (FA) and stoichiometric data to quantify how increased sheet flow altered the relative heterotrophic and autotrophic contributions to aquatic consumers in a field experiment that introduced flowing water to an Everglades marsh in November, 2014. Algal taxonomic composition was different between pre-flow and flow sampling, marked by increases in the nutrient exploiting Mougeotia species (green algae) during flow sampling. Dietary tracer FAs in consumers reflected changes in algal resources, including an increase in green algae-derived and a decrease in bacteria-derived FAs. These food web responses indicate that establishing historic water velocity in degraded wetlands can shift the origins of organic matter from a more detrital to more algal supported web.
11
Hankison, Shala J. "The role of natural and sexual selection in the origin and maintenance of divergence within and between the Mexican sailfin mollies, Poecilia velifera and P. petenensis". Connect to this title online, 2006. http://etd.lib.clemson.edu/documents/1171042685/.
Testo completo
12
Gierszewski, Stefanie [Verfasser], e Klaudia [Gutachter] Witte. "Virtual fish for real science - Investigating the role of public information content for mate-choice copying in the sailfin molly (Poecilia latipinna) using live fish and computer-animated fish stimuli / Stefanie Gierszewski ; Gutachter: Klaudia Witte". Siegen : Universitätsbibliothek der Universität Siegen, 2020. http://d-nb.info/1216332231/34.
Testo completo
13
ShangChi, Lin, e 林上奇. "Sailfish Imagination-Creative Concepts and the Analysis of Lin ShangChi". Thesis, 2011. http://ndltd.ncl.edu.tw/handle/83jdh8.
Testo completoAbstract (sommario):
碩士國立臺東大學
美術產業碩士學位在職進修專班
99
The east coast of Taiwan is next to the Pacific Ocean. Every year the Kuroshio Current, which is the world’s second largest ocean current, flows through the sea east of Taiwan. Plenty of migratory fish follow the Kuroshio Current and migrate northward, which brings people abundant valuable marine resources in east Taiwan. One of the most important species that come from the marine resources of Kuroshio Current is sailfish. Therefore, sailfish is a kind of specialty in east Taiwan fisheries. An artist’s idea originates from daily life. The author of this thesis has lived in Taitung for nine consecutive years. As the knowledge of east Taiwan increases, the energy and passion of art creation rise just like a gushing fountain. Accordingly, it is an excellent opportunity to record the special topic of east marine sailfish, by means of artistic creation. From the review of art history, the pursuits of visual art changes from time to time. At the very beginning, people stressed the basic elements of shape, space and color, and then steadily added new elements such as perspective, hues, composition and text, etc. After the development of Impressionism, people started to seek the essence of art. In modern times, the spirit of Simple Aesthetics just matches the desire, hence Simple Aesthetics began to spread. Recently, people have tried to combine eastern imagination together with Simple Aesthetics because the significance of Asian Art increases gradually. This not only becomes a type of design principle, but also can be applied to practical daily life. Consequently, how to combine the materials of existing cultures with the trends of the future will be a potential topic to study. In this thesis, the creation of art work originates from the concept of “Sailfish Imagination” and is expressed by using the technique of acrylic paint. Through painting we hope to render the imagination of sailfish and marine cultures, moreover, to discuss the relationship between human and nature.
14
Simms, Jeffrey R. "Early life ecology of sailfish, Istiophorus platypterus, in the northern Gulf of Mexico". 2009. http://hdl.handle.net/1969.1/ETD-TAMU-2009-05-774.
Testo completoAbstract (sommario):
Sailfish, Istiophorus platypterus, are commonly taken by the recreational and
commercial fisheries in the Gulf of Mexico (Gulf) and larvae are frequently reported in
the region, indicating the Gulf's potential role as spawning and/or nursery ground of
sailfish. Five ichthyoplankton surveys were conducted in shelf and slope waters of the
northern Gulf during the summers of 2005 (May, July, September) and 2006 (June,
August). Surveys were conducted off the Texas and Louisiana coasts from 27 - 28N
and 88 - 94W. During the two year study, 2,426 sailfish larvae were collected, ranging
in size from 2.0 - 24.3 mm standard length (SL). Sailfish larvae were collected in 45.0%
of collections with a peak density ranging of 51.5 larvae per 1000 m-2 of water sampled,
and the highest larval abundances were observed within frontal features of the Loop
Current. Sagittal otoliths were extracted from 1,236 larvae, and otolith microstructure
analysis indicated sailfish ranged in age from 5 - 25 days post-hatch. Hatch-date
distributions indicated fish were from early May to mid September spawning and/or
hatching events. Instantaneous growth coefficients (g) ranged from 0.113 to 0.127 with
intra- and inter-annual variations in growth observed. Growth coefficients correspond to
a 10.7 - 11.9% increase in length per day. Instantaneous daily mortality rates (Z) were estimated from regressions of the decline in loge-transformed abundance on age and
ranged from 20.4% to 29.2% per day suggesting large losses during the early life
interval. Instantaneous weight-specific growth coefficients (G) ranged from 41.5% to
45.9% per day and were indexed to daily mortality to assess intra- and inter-annual
variation in recruitment potential. Recruitment indices > 1.0 were observed during all
surveys, suggesting cohort biomass was increasing and that conditions were favorable
for growth, survival and recruitment. The results of this study indicate that the northern
Gulf represents viable spawning and nursery habitat of sailfish and the sustainability of
Atlantic sailfish populations may be linked to spawning in the Gulf.
15
CHEN, CHIAU-RU, e 陳巧儒. "Antibacterial and Preservative Efficacy in Sailfish by Using Vacuum Package and Allyl Isothiocyanate". Thesis, 2013. http://ndltd.ncl.edu.tw/handle/51602235457222057159.
Testo completoAbstract (sommario):
碩士國立高雄海洋科技大學
水產食品科學研究所
101
Histamine poisoning is usually associated with fishes such as tuna or sailfish. Because those fishes contain high levels of free histidine which can be converted by a decarboxylase produced by bacteria. Therefore, inhibiting the growth or enzymatic activities of histamine producing bacteria (HPB) is a critical procedure to prevent histamine poisoning. Japanese horseradish (wasabi) is a popular spice in Taiwan and its major volatile compound, allyl isothiocyanate (AIT), has been reported to possess a high antibacterial activity. Currently, vacuum-packing is the most common method to extend the shelf life of fishery products. However, a single preservation method such as applying AIT or vacuum packing is insufficient. The antibacterial and preservative efficacy of the combination of vacuum packaging and gaseous AIT in sailfish was evaluated. In the study, sailfish samples were inoculated with histamine producing bacteria, Raoultella ornithinolytica, then treated with different concentrations of gaseous AIT (329.08, 459.46 or 516.70 mg / L air) at 4°C for 24 hr. The sailfish samples were vacuum or non-vacuum packed, then stored at 15°C, 25°C or 4-25-4°C. The samples without vacuum package no AIT treatment were served as the control group. Levels of total aerobic counts, histamine-producing bacteria, total volatile basic nitrogen (TVBN) and biogenic amines were analyzed daily. Significantly lower counts of total aerobic and histamine producing bacteria was found in the AIT treated samples than the samples without AIT treatment (p<0.05) within the group without vacuum packaging. However, bacterial counts were not significantly reduced within the group with vacuum packaging. In addition, similar results were obtained for TVBN. TVBN values reduced correlated with the increasing AIT concentrations in the unvacuum packed group but not in the vacuum packed group. In the unvacuum packed group, histamine amount reduced significantly with AIT treatment (p<0.05) and the reduction is correlated with AIT concentrations. In the vacuum packed group, AIT treatment also showed an inhibitory effect against histamine production. Comparing the control, the vacuum packaged samples showed significantly lower histamine production than unvacuum packaged samples (p<0.05).
16
Hsieh, Ping-Feng, e 謝秉峯. "Marine environmental effects on the spatio-temporal distribution of sailfish in the Atlantic Ocean". Thesis, 2016. http://ndltd.ncl.edu.tw/handle/ajj74j.
Testo completoAbstract (sommario):
碩士國立臺灣海洋大學
環境生物與漁業科學學系
105
Sailfish (Istiophorus platypterus), caught in the commercial tuna longline and recreational fisheries, is an important apex predator in marine ecosystems. However, the spatial and temporal distributions of Atlantic sailfish may be impacted by marine environmental factors, leading to possible shifts in the distribution of the fishing ground. Generalized additive models (GAMs) were applied in this study to analyze the influence of chlorophyll-a concentration (CHL), sea surface height (SSH), mixing layer depth (MLD), sea surface temperature (SST), and sea surface salinity (SSS) on the catch rates and habitat distribution of Atlantic sailfish with data collected from the Taiwanese tuna longline fleet. All environment factors considered in the models were statistically significant and sea surface temperature was the primary factor that affects the distribution of sailfish. The hotspot of habitat distribution was between 20°N-20°S in the Atlantic Ocean. The results of this study could be used to predict the habitat distribution of Atlantic sailfish and provide useful scientific information for fisheries management, if needed, to potentially reduce the sailfish bycatch in tuna longline and purse seine fisheries.
17
Chen, Hung, e 陳鋐. "Stock assessment of sailfish(Istiophorus platypterus) in the Indian Ocean using data-limited methods". Thesis, 2016. http://ndltd.ncl.edu.tw/handle/26144160796377936832.
Testo completoAbstract (sommario):
碩士國立臺灣海洋大學
環境生物與漁業科學學系
104
Sailfish (Istiophorus platypterus) is a highly migratory fish that inhabits tropical and subtropical Atlantic, Pacific and Indian Oceans. In the Indian Ocean, sailfish is mainly caught by gillnet and longline fleets of the countries around the Arabian Sea. Catches increased sharply since the 1990s and the average catch exceeded 29,000 tones in recent years. Due to lack of biological information and effort for sailfish in the Indian Ocean, this study adopts Catch-MSY method and Depletion-Based Stock Reduction Analysis, which need only history catch and prior distribution of life history parameters and stock parameters, to conduct the assessment for sailfish in the Indian Ocean. The results of both methods indicate that catches and fishing mortality substantially increased and biomass decreased gradually since the 1990s. Currently, the stock status is not overfished. However, fishing mortality obtained from Catch-MSY method is at a high level, while, fishing mortality obtained from DB-SRA is still below FMSY. Comparing to Catch-MSY method, the estimates of DB-SRA are more robust and DB-SRA can incorporate more biological and stock parameters. However, the results of this study indicate that the model estimations of DB-SRA are influenced by the assumption of depletion. To further understand the population dynamics of sailfish in the Indian Ocean, improvements in data collection and quality of fishery statistics and are necessary. In addition, biological studies of sailfish in the Indian Ocean should be enhanced simultaneously.
18
Tsai, Chung-Nan, e 蔡政南. "Trophic Size-structure and Feeding Ecology of Sailfish, Istiophorus platypterus, in Eastern Taiwan Waters". Thesis, 2014. http://ndltd.ncl.edu.tw/handle/90575804482892397807.
Testo completoAbstract (sommario):
博士國立臺灣大學
海洋研究所
102
Fishery stock assessment and management used to focus on single species method. FAO promoted the ecosystem-based fishery management (EBFM) for the sustainability of living aquatic resources. EBFM need to be taken into account with trophic structure and flows of biomass through species interactions. In present study, nitrogen and carbon stable isotopes analyses were applied to investigate the trophic structure of sailfish. A total of 263 sailfish muscle samples were examined. The δ15N values for sailfish ranged from 7.51 to 14.19 &;#8240; (mean=12.06&;#8240; ± 1.16) and the δ13C values ranged from -22.04 to -15.48 &;#8240; (mean=-17.62&;#8240; ± 1.10). The δ15N values were positively related to body length, while δ13C were negatively related to body length. The results revealed the different size class of sailfish occupied different trophic position of pelagic ecosystem. We postulate that the factors which influence on trophic position of sailfish between young and adult were food sources, habitats and migratory pattern. Stable isotope ratios of a consumer are related to those of its prey. Stable isotope mixing model was used to estimate diet composition of consumer by mass balance equation. In this study, stable isotope mixing model was applied by carbon and nitrogen stable isotopes of sailfish to estimate the food sources of their prey. The sailfish were segregated by juveniles (<140cm, LJFL), maturing stage (141-180cm, LJFL) and adults (>181cm, LJFL) from previous research. The most important preys for juvenile sailfish were Bramidae (15.90%), Mene maculata (11.04%) and Clupeidae (9.62%). Therefore, adult sailfish feed on Trichiurus lepturus (32.63%), followed by Katsuwonus pelamis (15.82%) and Priacanthus macracanthus (11.30%). In spite of the apparent high prey diversity of diet composition for sailfish, they feed mainly on epipelagic species in the waters off eastern Taiwan. Food web is an important element in pelagic ecosystem to transport nutrients and energy flow between consumers and prey. In order to investigate the role of sailfish and to explore the function and structure of pelagic ecosystem in eastern Taiwan waters, we applied Ecopath with Ecosim model inferred from stable isotope analysis, stomach content analysis and fisheries statistical data to perform pelagic trophic model of eastern Taiwan. The results reveal that the trophic level of the functional groups varied from 1.0 to 4.52. Marine mammals and shark are occupied top trophic level. Total ecosystem throughput is 3054.43 t/km2/yr. Sum of all production, sum of all consumption and sum of all respiratory flows are 1787.29, 824.89 and 528.62 t/km2/yr, respectively. Total primary production to total respiration ratio is 3.13. Connectance Index (CI) and System Omnivory Index (SOI) are 0.47 and 0.25, respectively. In this study, we preliminary established pelagic trophic model in eastern Taiwan and the results can provide scientific references for ecosystem-based fisheries management. Ecosim model was applied to predict biomass trajectories of each functional groups in next 50 years. The predicted biomass trends indicate that if we maintain current fishing efforts in eastern Taiwan will reduce most of biomass of top predators in the future (e.g. Marine mammals, tuna, billfish and shark). The results show current fishing efforts in eastern Taiwan is still high, we suggest the fish stock need to be monitored and fishing efforts should be further reduced.
19
Chiang, Wei-Chuan, e 江偉全. "Population dynamics and stock assessment of sailfish (Istiophorus platypterus)in waters off eastern Taiwan". Thesis, 2004. http://ndltd.ncl.edu.tw/handle/97567047578403142498.
Testo completoAbstract (sommario):
博士國立臺灣大學
海洋研究所
92
Age-growth and reproductive biology of sailfish were studied and the results were applied to yield per recruit (Y/R) and spawning stock biomass per recruit (SSB/R) analysis to assess the current stock of sailfish in the waters off eastern Taiwan. Length and weight data were collected monthly from a total of 6,279 sailfish (1,927 females and 4,352 males) landed in Shinkang Fish Market during July 1998 to December 2002. The fish sizes ranged from 78 to 239 cm LJFL (lower jaw fork length) or 1 to 60 kg RW (round weight). The proportion of females increased with fish size and reached 100% at fish size larger than 227 cm or 46 kg. Age and growth were examined by counting growth rings on cross sections of the fourth spine of the first dorsal fin of 1,135 (436 female and 699 male) sailfish. Significant differences were found in length-at-age and estimated growth parameters between sexes. Females grew faster and reached larger sizes than males. The generalized von Bertalanffy growth parameters estimated for females were the following: asymptotic length (L∞) = 343.8 cm, growth coefficient (K) = 0.011 yr-1, age at zero length (t0) = –0.468yr, and the fitted fourth parameter (m) = –1.639. The growth parameters estimated for males were the following: asymptotic length (L∞) = 294.0 cm, growth coefficient (K) = 0.023 yr-1, age at zero length (t0) = –0.704 yr, and the fitted fourth parameter (m) = –1.288. Monthly variations in gonadosomatic index of 528 sailfish and histological examination on the 391 gonad tissue provided the basis to define the different stages of maturity. This information indicated that the sailfish spawned from April to September. Length at 50% maturity was 166.376 cm and 151.556 cm, respectively for females and males. Sailfish are a multiple spawning species, the spawning frequency was 1.89 days, batch fecundity equaled 0.2–2.48 million eggs. The relationship between batch fecundity in millions (BF) and weight (kg) or length (cm) was: BF = 2.03×10-3 RW1.936 (r 2 = 0.714; n = 18) and BF = 5.46×10-15 LJFL6.283 (r 2 = 0.667). Via age-length transformation and catch curve analysis, total mortality rate (Z) was estimated as 0.56 and 0.58 yr-1, and the natural mortality rate (M) was 0.26 and 0.27 yr-1 respectively for females and males as obtained using Pauly’s empirical equation. The effects of different levels of M (0.20, 0.26, 0.30, 0.35 yr-1 for females and 0.20, 0.27, 0.30, 0.35 yr-1 for males), fishing mortality (F, 0–1.0 yr-1) and age at first capture (tc, 1–10 yr) on Y/R and SSB/R of sailfish were evaluated. The results showed that at the current tc of 5 yr and the current M of 0.26 yr-1 for females and 0.27 yr-1 for males, the current F values were below F0.1 for both sexes. SSB/R was 14.90 kg and spawning potential ratio (SPR) was 38.6 %. The sailfish in the waters off eastern Taiwan appear to be moderately exploited. However, in view of the recent rapid increase in fishing effort, it is evident that the stock condition and developments in the fishery still need to be monitored.
20
Guang-Rung, Hu, e 胡光榮. "Effects of four different drying methods on the quality of dried sailfish, Istiophorus platypterus". Thesis, 2007. http://ndltd.ncl.edu.tw/handle/33944407716698990642.
Testo completoAbstract (sommario):
碩士國立屏東科技大學
熱帶農業暨國際合作系所
95
This study was to investigate the effects of four different drying methods on the qualities of dried products of sailfish、Istiophorus platypterus、caught on the eastern coast of Taiwan. The methods used included smoking, sun drying、hot-air、and cold-air drying. Sensory related properties、including water activity (Aw)、sensory evaluation and color values (L、a and b) were monitored during the 3-month storage. AW of all the products dried by the four different methods was significantly different during the storage period. Results of the analysis of L value showed no significant difference among the four drying methods. However、a and b values increased with the increase of time. In the product prepared by sun drying、oxidative stabilities、including peroxide value (POV)、acid value (AV) and thiobarbituric acid value (TBA) were determined during the 3-months storage. The results showed that POV、 AV and TBA values in the sun dried product incresed with the increase of the storage time up to 3 months. However、there was no signifirant change in the three values in the smoked products throughout the storage.
21
Hsu, Hsiang-Jung, e 許向戎. "Stock assessment of sailfish（Istiophorus platypterus）in waters off eastern Taiwan using gear-specific Separable Virtual Population Analysis". Thesis, 2009. http://ndltd.ncl.edu.tw/handle/66573080396285005629.
Testo completoAbstract (sommario):
碩士國立臺灣海洋大學
環境生物與漁業科學學系
98
Sailfish (Istiophorus platypterus) is an important commercial species in waters off eastern Taiwan. It is known to be sexually dimorphic and is exploited by various fishing gears. In this study, therefore, the gear-specific Separable Virtual Population Analysis was constructed for evaluating the fishing exploitation and population status of this stock. In addition, the Monte Carlo simulation was used to evaluate the impact of observation errors associated with catch-at-weight and sex-ratio data on the model estimations. The results of this study indicated that the biomass gradually decreased since 2005 due to slightly increased fishing mortality. However, the estimates of fishing mortality in 2008 were only about 28-41% and 19-30% of those in 2000 for female and male respectively, biomass in 2008 were about 1.01-1.75 folds and 1.24-2.31 folds of those in 2000 for female and male respectively, and spawning biomass in 2008 was about 2.28-3.33 folds of that in 2000. The sailfish in the waters off eastern Taiwan appear to be moderately exploited. The results of simulation analysis indicated that incorporating observation errors in catch-at-weight would lead to obvious impact on model estimations, especially for females. The impact of error in sex ratio was relatively mirror and increasing the sample size of sex ratio data can improve the precision of the model estimations. Keywords: sailfish, waters off eastern Taiwan, gear-specific Separable Virtual Population Analysis, Monte Carlo simulation.
22
Tai, Ching-Hsuan, e 戴靖萱. "Development of abundance index for sailfish based on data from the Taiwanese tuna longline fishery in the Atlantic Ocean". Thesis, 2017. http://ndltd.ncl.edu.tw/handle/8ep3bx.
Testo completoAbstract (sommario):
碩士國立臺灣海洋大學
環境生物與漁業科學學系
105
Sailfish and spearfish are widely distributed in the Atlantic Ocean. Catch records of these two species were combined due to as non-target species in the Taiwanese tuna longline fishery in the Atlantic Ocean. However, there is a need to separate catch data of sailfish and spearfish into two species for assessment of Atlantic sailfish. Logbook data of the Taiwanese tuna longline fishery were collected in this study from 2009 to 2015, including year, month, attitude, longitude, fishing effort and catch of sailfish. We compared various methods to estimate catch ratios of sailfish in this fishery and different approaches to standardize CPUE (Catch per unit of effort) for the species, in order to develop an abundance index of Atlantic sailfish for 1968-2015. Results showed that GAMs (Generalized Additive Models) are the most appropriate methods used to estimate the catch ratio of sailfish in the fishery and that the delta-lognormal approach can deal well with large amount of zero catch data for sailfish. Standardized CPUE showed that sailfish abundance substantially decreased from the late 1960s to the 1970s and remained relatively stable thereafter. Given that the Atlantic sailfish might be overfished and large uncertainty in the assessment results, long-term series of abundance index should be developed to be used as basic input data for stock assessment to understand current stock status and the variation. Results from this study could be used to provide scientific-based suggestions for fishery management.
23
Zhang, Sheng Xiong, e 張勝雄. "Studies on the relationship between biogenic amines and hygienic quality in the meat of marlin and sailfish sold in markets". Thesis, 1996. http://ndltd.ncl.edu.tw/handle/64600972782900454390.
Testo completo
24
Li, Pei-Cheng, e 李沛承. "Antibacterial and preservative effects of the gelatin film incorporating with the Thyme essential oil and modified atmosphere packaging (MAP) on sailfish fillet". Thesis, 2015. http://ndltd.ncl.edu.tw/handle/35583741744544471083.
Testo completoAbstract (sommario):
碩士國立高雄海洋科技大學
水產食品科學研究所
103
Sea food is an excellent nutrition source but has a short shelf life. Many packaging techniques and anti-bacteria material have been invented such as vacuum, modified atmosphere packaging (MAP), edible films, and plant ethereal oil which were proved to be effective. Therefore, this research combined these three techniques. Thyme essential oil was added into the membrane made with gelatin and sodium methyl cellulose (final concentration, 10%). Marline fish samples were wrapped with this membrane then packaged into regular air, vacuum, 100% nitrogen, or 100% carbon dioxide (CO2). In addition, the marline sample wrapped with the membrane without essential oil and stored under regular air was used as a control. All samples were stored at 4°C or15°C and analyzed at every two days for microbiological (total mesophilic, psychrophilic, anaerobic counts), physic-chemical characteristics (pH, total volatile basic nitrogen- TVBN, water losing, and water holding capacity). The most effective inhibition to the microbial growth was obtained from CO2 treatment. Comparing with the control, the CO2 packages reduced the 2.4, 2.5, 2.7 log CFU/g at on day 15 at 4°C, respectively, and 2.6, 0.7, 1.1 log CFU/g on day 7 at 5°C, respectively. There was no significant difference for pH values between treatments (p>0.05), though the pH values in CO2 packages were lower due to the dissolving of CO2 into fish meat. TVBN values were retarded by CO2 treatment at 4°C after day 5 (p<0.05) but no significant difference was observed at 15°C. There was no significant difference for water losing and holding capacity between treatments (p>0.05). Based on the results, marline fish wrapped with membrane with thyme essential oil and stored in CO2 packages showed the highest inhibition to microbial growth ability not to other physic-chemical characteristics.
25
Stewart, Audrey Julia. "Experience and mate choice in sailfin mollies (Poecilia latipinna)". Thesis, 2014. http://hdl.handle.net/2152/25977.
Testo completoAbstract (sommario):
Learning and experience shape mate preferences in many species. My thesis investigates the role of experience on mating behavior of male and female sailfin mollies (Poecilia latipinna). In the first chapter I explore whether adult experience influences male sailfin molly mate preference for their sexual parasite, the Amazon molly (Poecilia formosa), and whether experience could account for reproductive character displacement (RCD) of male mate preference in this species. Sailfin males from sympatric populations show a stronger preference for conspecific females over Amazon mollies than do males from allopatric populations. I exposed males from sympatric and allopatric populations to either a sailfin female or an Amazon prior to a mating trial with an Amazon. For the allopatric population, males with recent experience with an Amazon directed fewer mating behaviors towards an Amazon during mating trials than did males with recent experience with a sailfin. Males from the sympatric population, however, performed the same amount of mating behaviors towards an Amazon regardless of experience. Thus adult experience influences mating preferences and suggests that experience may play a role in RCD in this species. In the second chapter I investigate whether a learned sensory bias could influence female mate preferences. Sensory biases that influence mate preferences can arise through selection on the sensory system in foraging and predator detection domains. I tested whether a learned preference originating outside of the mating domain, specifically a color-based food preference, can be transferred to a color-based preference for a male trait. I trained female sailfin mollies to associate either green or blue with food and then tested their preference for animated male sailfins featuring either a blue or green spot. I found that females did not prefer the male with the same color spot to which they had been conditioned. I discuss the problem of learned preference transfer and suggest directions for future research into the role of learning in sensory bias.text
26
Tsai, Hsien-Liang, e 蔡賢良. "Studies on Biology of Invasive Sailfin Catfish (Pterygoplichthys sp.) in Taiwan". Thesis, 2011. http://ndltd.ncl.edu.tw/handle/64662028458711921879.
Testo completoAbstract (sommario):
碩士國立嘉義大學
水生生物科學系研究所
99
Loricariidae fish are very popular fish species on ornamental fish market in recent years, which commonly known as the scavengers was introduced in Taiwan for aquarium cleaning during 1980s. But inappropriate release and abandonment, it was now established in Taiwan with stable groups. Lacking of comprehensive information, the scientific name were divergent, and the species is still not sure. In this study, the sailfin catfishes were investigated by traditional identification and phylogenetic analyze. We also examine their feeding habits and niche overlap between sympatric species, to explore the species problem and threatening to native species. Character examinations showed that there were no significant differences between the sailfin catfish collected from Jingmei river of Taipei, Toucian river of Hsinchu, Bajhang river of Chiayi, and Kao-Ping river of Pingtung. They could be Pterygoplichthys disjunctivus with all spots on abdomen coalescing to form vermiculations or P. pardalis with spots on abdomen mostly discrete, usually no more than five spots coalescing to form short vermiculations by key identification. However, the results of phylogenetic analyze showed they were classified in the same group on phylogenetic tree, and their genetic distances were less than 1%. So we conjectured that the sailfin catfish in Taiwan could be a single species with several introductions. Results of feeding ecology showed that filament algae, organic detritus and chironomidae represented the most important items on the diet of this species. Their diets are such alike in different months, length, and areas. However, the niche overlap index between Pterygoplichthys sp. and indigenous Acrossocheilus paradoxus, Zacco pachycephalus, Candidia barbatus was 0.80, 0.70, and 0.89. Due to their highly competition on food resources, the invasive sailfin catfish may cause damaging effects to the stream ecosystem and native fish populations.
27
Chang, Yao-Lin, e 張曜麟. "Factors Affect Distribution of Total and Organic Mercury Concentrations in Marlins and Sailfishes in Southern Taiwan". Thesis, 2006. http://ndltd.ncl.edu.tw/handle/98526505747379212577.
Testo completoAbstract (sommario):
碩士國立高雄師範大學
生物科學研究所
94
Numerous studies have shown that high levels of mercury are harmful to both humans and wildlife. The concentration of mercury has been determined in four species of marlins for a survey of the bioaccumulatable contaminant. Samples were prepared using standard digestion procedures and analyzed by flameless atomic absorption. Seventy samples were collected from Southern China Sea. Among the four species analyzed, three species illustrated concentration level of total mercury higher than the recommended food safety criteria by World Health Organization. Concentrations of total and organic mercury were correlation in liver and muscle of marlins. It was observed that concentration level of mercury was related to fish length. Among the muscle tissue, organic mercury ranged from 77.67 to 88.78% of total mercury content in marlins. It was believed that demethylation of organic mercury in liver resulting lower organic mercury - total mercury ratio (i.e., 33.77% to 53.28% ). Comparison of muscle mercury content was made for marlins, tunas, and salmons. Species with higher trophic level will have higer tendency of mercury accumulation. Also concentration level of organic and total mercury were correlated to length of fish. Based upon the mercury concentration in marlins, daily consumption of marlins was estimated for the health concerns.
28
吳筱萍. "Population characteristics、reproduction cycle and feeding habit of Many-rayed Sailfin Sucker Catfish( Pterygoplichthys multiradiatus )". Thesis, 2002. http://ndltd.ncl.edu.tw/handle/28269572283705250240.
Testo completoAbstract (sommario):
碩士國立高雄師範大學
生物科學研究所
90
The objectives of this study were to evaluate the population expanding potential of an exotic fish species, many-rayed sailfin sucker catfish (Pterygoplichthys multiradiatus), and its impact on endemic lotic organisms in Taiwan. I investigate the population characteristics, reproductive cycle, and feeding content from December 1999 to November 2000. During the study period, 537 individuals were collected. The standard length of collected individuals ranged from 12.5 to 43.7 cm, with an average of 28.64 cm. Most of them with a standard length distributed between 30 and 35 cm. Female present a longer body length than male. Body weight and standard length were positively correlated. However, the variations of external color pattern and morphological differences between opposite sexes were unable to clearly distinguished by the 13 body measurements. The reproduction season of P. multriradiatus in Taiwan extended from April to September, at least for six months. However, few individuals were still able to reproduce in October to March. The minimum standard length for a mature female is appropriately on 25 cm. For that standard length greater than 31 cm, at least half of individuals were equipped with mature egg. The female to male ratio in collected individual were almost 2.5 to 1, the value was even higher during the reproduction season. A positive correlation was found between the intestine weight and body weight, thus the intestine is recognized as the major digestion organ. No significant difference was identified for the water content and organic content of intestine between the individuals of large and small body sizes. Therefore, the food composition of this species did not vary significantly from young to adult, mainly composed by bottom soil and benthic algae. According to the characteristics of population structure, reproduction cycle, and feeding habit of P. multriradiatus from the mid- and downstream region of Kao-Ping River, the population of this species will expand and invade into the upstream section. In addition, a negative impact is predicted on those endemic fish species of periphyton feeders and bottom spawners.
29
Yang, Wen-Kai, e 楊文凱. "Species identification, larval growth, and strategies for salinity adaptation of the sailfin molly from the coast of Lin-Yuan, Kaohsiung". Thesis, 2005. http://ndltd.ncl.edu.tw/handle/39806750908325818148.
Testo completoAbstract (sommario):
碩士國立中興大學
生命科學系
93
Sailfin molly, an exotic fish in Taiwan, is an euryhaline teleost which can survive in either freshwater or seawater environments. Because the mollies are aquarium fish, they have a few variations in appearance. In order to achieve accuracy of the experiment, we performed measuring morphometric characters and contrasting the sequences of mitochondrial NADH dehydrogenase subunit 2 (NADH2) to identify species. The results indicated that the sailfin molly is the most similar with Poecilia latipinna. Sailfin molly is ovoviviparous fish, and it can reproduce in fresh water and seawater in laboratory. To test the salinity tolerance, the adult sailfin molly can be transferred directly from freshwater (FW) to brackish water (BW, 15 ‰) or from seawater (SW, 35 ‰) to FW without mortality. Also, the FW group was transferred to SW without mortality when transferred to BW for 24 hrs prior to SW. On the other hand, the larvae born in BW or SW can be transferred directly to FW without mortality, but those born in FW were found over 50 % mortality in 24 hrs after transfer to SW. Water contents, body length, and body weight of larvae of transferred groups did not reveal significant difference compared to control groups. Plasma analyses showed that the osmolality, [Cl-], and [glucose] correlated positively with environmental salinity; but [Na+] as well as the muscle water contents (MWC) did not show significant difference among experimental groups. The Na+, K+-ATPase (NKA) activity of gills of FW and BW groups are significantly lower than the SW group, and the number of Na+, K+-ATPase immunoreactive (NKIR) cells of BW group is less than the SW group. The results revealed that: (1) the sailfin molly from Lin-Yuan, Kaohsiung is Poecilia latipinna; (2) in larvae or adult, the SW group have wider salinity tolerance than the FW group; (3) the analyses of MWC and plasma showed the effective osmoregulatory mechanism for osmoregulatory balance in different salinities; (4) the lowest NKA activity in the FW and BW groups indicates sailfin molly inhabiting in FW and BW (15 ‰) needs less ionic regulation by NKA.
30
Gibelli, Julie. "Liens entre la personnalité, la plasticité comportementale et la cognition : expériences chez le Diamant mandarin (Taeniopygia guttata) et le Molly voile (Poecilia latipinna)". Thèse, 2018. http://hdl.handle.net/1866/21775.
Testo completo