Thematische Bibliographien / Freshwater fish

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Auswahl der wissenschaftlichen Literatur zum Thema „Freshwater fish“

Autor: Grafiati

Veröffentlicht am 4. Juni 2021

Zuletzt aktualisiert am 1. Juni 2024

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Zeitschriftenartikel zum Thema "Freshwater fish"

Haryani, GS. „Migratory freshwater fish in Indonesia: Threats and conservation efforts“. IOP Conference Series: Earth and Environmental Science 1062, Nr. 1 (01.07.2022): 012001. http://dx.doi.org/10.1088/1755-1315/1062/1/012001.

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Abstract The process of fish migration is one of the most important biological aspects of the life of certain fish species, including fish species that live in freshwaters. In Indonesia’s freshwaters, several types of fish migrate to fulfill parts of their life cycle, such as Anguilla spp., Tor spp., and Rasbora spp., which have economic and ecological values. Fish habitats and migration routes can be affected by many cause changes, including dam constructions, other infrastructure constructions, drainage of wetlands, and floodplain disconnection. Other threats to migratory freshwater fish are overfishing and pollution. In Indonesia, most migratory freshwater fish threats were obstructions to free-flowing rivers, such as dams, and the exploitation of adult fish that migrate for spawning. Some management approaches should conserve and sustain the use of migratory freshwater fish.

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Greenhalgh, M. „FRESHWATER FISH“. Journal of Fish Biology 56, Nr. 6 (Juni 2000): 1565. http://dx.doi.org/10.1006/jfbi.2000.1247.

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Ekinadose Orose, Edafe Odioko und Okechukwu Kenneth Wokeh. „Catalogue of Some Saltwater and Freshwater Fish Species of the Niger Delta Region of Nigeria“. World Journal of Advanced Research and Reviews 9, Nr. 3 (30.03.2021): 056–84. http://dx.doi.org/10.30574/wjarr.2021.9.3.0075.

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The study was done to review some saltwater and freshwater fish species in the Niger Delta region of Nigeria. The Niger Delta is one of the most prominent regions in Nigeria, endowed with several water bodies that are distributed as freshwater like rivers, lakes, streams and creeks. These freshwater ecosystems in the region, are abundantly endowed with fish species such as Clarias gariepinus, Pila ovate, Labeo coubie, Synodontis budgetti and Synodontis eupterus. Apart from the freshwaters, the region also has vast marine ecosystem with abundance of fish species such as Elops lacerta, Mugil cephalus, Thais coronata, Periophthalmus papilio, Tympanotonus fuscatus, and Sardinella maderensis. Unfortunately, many of these fish species are endangered due to constant pollution in the Niger delta regional coastal environment. As a result, it is important to document some available freshwater and marine water fish species which will serve as a reference material for both academics and research institutions, should any of the fish species go into extinction.

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Jahan, Khatunar. „Freshwater Fish Cultivation“. Journal Siplieria Sciences 1, Nr. 2 (24.12.2020): 25–29. http://dx.doi.org/10.48173/jss.v1i2.61.

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This paper aimed to finding out about Freshwater Fish Cultivation. The research method used is descriptive method, namely the method of explaining a problem. In addition, the method used in this study is an explanatory method, namely a method that explains what, how are the results of the research itself far. There are several things that we must pay attention to when harvesting the results, including the tools used to collect the results, the methods used for harvesting the results and how to store the results. The tools used to collect fish are many ways including: hook, nets, Pecak, Anco, Bubu, Kere, and so on and it can also be done by drying the pond water as a whole, this is usually used for harvesting as a whole.

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Burkhead, Noel M. „Freshwater fish distribution“. Journal of the North American Benthological Society 21, Nr. 4 (Dezember 2002): 729–31. http://dx.doi.org/10.2307/1468443.

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Ross, Stephen T. „Freshwater Fish Distribution“. Transactions of the American Fisheries Society 132, Nr. 2 (März 2003): 406. http://dx.doi.org/10.1577/1548-8659(2003)132<0406a:>2.0.co;2.

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Burr, Brooks M. „FRESHWATER FISH DISTRIBUTION“. Copeia 2002, Nr. 4 (Dezember 2002): 1171–73. http://dx.doi.org/10.1643/0045-8511(2002)002[1171:]2.0.co;2.

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Harvey, Jonathan. „Freshwater fish distribution“. Freshwater Biology 53, Nr. 10 (Oktober 2008): 2130. http://dx.doi.org/10.1111/j.1365-2427.2008.02021.x.

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Bury, Gwendolynn W., Rebecca Flitcroft, Mark D. Nelson, Ivan Arismendi und Evan B. Brooks. „Forest-Associated Fishes of the Conterminous United States“. Water 13, Nr. 18 (15.09.2021): 2528. http://dx.doi.org/10.3390/w13182528.

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Freshwaters are important, interconnected, and imperiled. Aquatic ecosystems, including freshwater fishes, are closely tied to the terrestrial ecosystems they are embedded within, yet available spatially explicit datasets have been underutilized to determine associations between freshwater fishes and forested areas. Here, we determined the spatial co-occurrence between freshwater fish distributions and forests within 2129 watersheds of the conterminous United States. We identified 21% of freshwater fishes as associated with forested areas, and 2% as strictly present only in highly forested areas (75–100% forested). The northern coasts and southeast regions, both heavily forested, showed the largest numbers of forest-associated fishes in highly forested areas and fish species richness. Fish associated with low-forested areas occurred in the southwest and central plains. Imperiled fishes were relatively evenly distributed among percent forest categories, which was distinctly different from patterns for all fishes. The identification of forest-associated fishes provides insights regarding species-specific landscape contexts. Determining these large-scale patterns of freshwater biodiversity is necessary for conservation planning at regional levels, especially in highly impacted freshwater ecosystems.

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Gumelar, Tommy, und Indra Bakti. „Digitalisasi Alat Ukur Ph Air Pada Budi Daya Ikan Air Tawar“. Jurnal Teknologi Informasi (JUTECH) 2, Nr. 2 (17.07.2021): 72–81. http://dx.doi.org/10.32546/jutech.v2i2.1658.

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The high market demand for freshwater fish needs, because it has become a daily commodity for Indonesian people from upper economic circles or low incomes, the need for freshwater fish is very high. The delicious taste of meat and the vitamins contained in freshwater fish are very good for the human body, therefore aquatic fish cultivators are developing to meet market needs. Various efforts were made to meet the market demand for freshwater fish, starting from increasing the number of ponds, improving fish feed to meet protein needs and paying attention to the pH of freshwater ponds. The use of digitalization of freshwater pH measurements is applied to facilitate control of the tolerance level of freshwater fish.

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Dissertationen zum Thema "Freshwater fish"

Henriksson, Anna. „Biotic resistance in freshwater fish communities“. Doctoral thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-110251.

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Invasions of non-native species cause problems in ecosystems worldwide, and despite the extensive effort that has been put into research about invasions, we still lack a good understanding for why some, but not other, communities resist these invasions. In this doctoral thesis I test hypotheses on biotic resistance using a large dataset of more than 1000 both failed and successful introductions of freshwater fish into Swedish lakes. We have found that the classic species richness hypothesis is a poor descriptor of introduction success because it fails to acknowledge that resident species contribute to the resistance in different ways. We developed a new measure of biotic resistance, the weighted species richness, which takes into account that the resident species contributes to the resistance with different strength and sign. Further, we correlated performance traits of species in their role as an invader and as a resident species to predict how the biotic resistance of these communities would develop over time. We found a positive correlation between performance traits: Some species have high introduction success, they make a large contribution to the resistance, and they cause extinctions when introduced but do not go extinct themselves when other species establishes, whereas other species are weak performers in these respects. Thus, the biotic resistance of these communities should grow stronger as non-native species accumulates. These results give us clues about what type of communities that should be most sensitive to further invasions, i.e., communities harboring species weak performers. My results show that the biotic resistance of communities is an important factor in determining invasibility of a community. They also show that methods for quantifying resistance must take into account how interactions are structured in nature. What determine the biotic resistance of a community is the type of interactions that the resident species have with the invader and not the species richness of the community.

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Carden, Kerilynn M. „Macrophytes as fish habitat : the role of macrophyte morphology and bed complexity in fish species distributions /“. Link to abstract, 2002. http://epapers.uwsp.edu/abstracts/2002/Carden.pdf.

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Lee, Ching-man. „Epidemiology of laribacter hongkongensis in freshwater fish /“. View the Table of Contents & Abstract, 2005. http://sunzi.lib.hku.hk/hkuto/record/B3149447X.

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Olden, Julian David. „Predictive models for freshwater fish community composition“. Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0021/MQ54206.pdf.

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Lee, Ching-man, und 李靜敏. „Epidemiology of laribacter hongkongensis in freshwater fish“. Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2005. http://hub.hku.hk/bib/B45010213.

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Benejam, Vidal Lluís. „Fish as ecological indicators in Mediterranean freshwater ecosystems“. Doctoral thesis, Universitat de Girona, 2008. http://hdl.handle.net/10803/7873.

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L'objectiu d'aquesta tesi és contribuir a l'ús dels peixos continentals com a indicadors de l'estat ecològic a la conca Mediterrània. En el primer treball es va detectar que encara que tots els índex biològics estaven correlacionats significativament, els peixos integren i expressen els estressos de manera i a una escala diferents, aportant una informació complementària als altres índexs. Al segon article es van estudiar els cabals de sis conques catalanes. S'ha mostrat que els règims hídrics estan alterats amb una tendència a la disminució del cabal i del nivell dels aqüífers. S'ha detectat quatre mètriques de peixos que es troben significativament afectades en zones més castigades per manca d'aigua degut a l'activitat humana. Es discuteix la necessitat de conèixer en profunditat el règim hídric de cada conca abans d'utilitzar els índex biològics. Al tercer article es va detectar que la composició d'espècies capturades va variar significativament al llarg del buidat amb un augment de l'alburn (A. alburnus) a les aigües pelàgiques durant els dies de pitjor qualitat de l'aigua, confirmant que l'alburn és més tolerant a la mala qualitat de l'aigua que la madrilleta vera (R. rutilus) i suggereix el seu potencial com a bioindicador. La condició d'aquestes dues espècies va canviar significativament al llarg del buidat de manera molt estreta amb la qualitat de l'aigua. Al quart capítol es va estudiar la biologia dels peixos d'un embassament altament contaminat (Flix). El percentatge de DELT anomalies i la presència de paràsits externs era major en la zona impactada que als punts de control i els valors més alts de pes eviscerat i pes del fetge estaven als punts de control. Les respostes van ser diferents per cada espècie i la carpa va ser la que va mostrar més clarament els impactes.
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The aim of this thesis is to contribute to the use of freshwater fish as ecological indicators in the Mediterranean basin. In the first article we found that although most biological indices were correlated, fish reflected different ecological aspects due to their particular features. In the second article the stream flow regimes of six Mediterranean basins were studied. A decrease of streamflow and aquifer levels was detected, despite no observed decrease of rainfall precipitation. Of the thirty metrics tested to detect sites impacted by water abstraction, we detected four significant fish metrics. Furthermore, the role of biotic indices when the river is artificially dry is discussed. In the third article we found that species composition in the pelagic zone varied significantly during the drawdown with higher proportion of bleak (A. alburnus) during the days of worst water quality, confirming that bleak is more tolerant than roach (R. rutilus) to poor water quality. The weight-length relationship of roach and bleak also varied significantly during the drawdown with close relationship between water quality and fish condition. In the fourth article the condition and fecundity of freshwater fishes were assessed in a highly polluted reservoir (Flix reservoir). We have shown significant increases of DELT anomalies and ectoparasite prevalences and decreases in condition and fecundity of several freshwater fish at the impacted area. The responses to the pollutants were species-specific and common carp was the species that showed more markedly the effects.

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Shaw, Benjamin John. „The ecotoxicology of engineered nanoparticles to freshwater fish“. Thesis, University of Plymouth, 2011. http://hdl.handle.net/10026.1/565.

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The use of nanoscale materials is growing exponentially, but there are also concerns about the environmental hazard to aquatic biota. Metal-containing engineered nanoparticles (NPs) are an important group of these new materials, and whilst there are undoubtedly a plethora of beneficial uses for these NPs, it is essential that an appropriate risk assessment is carried out in order to protect the environment and human health, with the consumption of contaminated fish a distinct possibility. The current study aimed to assess the bioavailability, uptake and toxicological effects of two metal-NPs (TiO2 NPs and Cu-NPs) to fish from both dietary and waterborne exposure routes and where appropriate compare them to their bulk counterpart. Whole body system effects were assessed along with the influences of the life stage of exposed fish and abiotic factors on toxicity. A technique to improve the quantification of Ti from TiO2 NPs in fish tissue was also developed. Effects from exposure to dietary TiO2 NPs manifested similarly to traditional dietary metal exposure, with no reduction in growth, but some sublethal affects. Exposure to waterborne Cu-NPs showed that rainbow trout were more acutely sensitive to CuSO4 than the NPs, but that despite limited uptake several body systems were affected (most notably ionoregulation). Larvae were more sensitive to CuSO4 than Cu-NPs, but no differences were seen with embryos, whilst larvae were more sensitive than embryos. Abiotic factors did have an effect on acute Cu-NP toxicity, though not always in a predictable manner, with some effects more pronounced than with CuSO4. Overall, it appears that metal-NPs are not as acutely toxic as their bulk counterparts, but sublethal effects, were routinely observed. As TiO2 NPs appear more toxic than its bulk counterpart, current legislation governing safe environmental limits may have to be adjusted, though the situation with Cu-NPs isn’t as clear and further investigation is required. However, the risk of human exposure via the consumption of NP contaminated fish fillets is extremely low.

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Brydges, Nichola M. „Cognition in freshwater fish : effects of the environment“. Thesis, University of Edinburgh, 2008. http://hdl.handle.net/1842/2388.

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For animals that live in a reasonably variable environment the capacity for learning and memory allow them to adapt to the changes they experience. Ecological factors that vary between habitats can affect a range of learning behaviours. Less attention has been directed at how this variation may affect memory processes, or how different ecological variables might interact when shaping cognition and behaviour. Therefore one aim of this thesis was to investigate how different ecological variables shape memory abilities and to test whether those same variables affect other related behaviours such as learning. In order to test this, I selected natural populations of a temperate freshwater fish, the three-spined stickleback (Gasterosteus aculeatus) from pond and river habitats that were proposed to differ in predation pressure, and assayed their learning, memory and other behavioural traits. Pond and river populations differed in their memory and orientation behaviour. An interaction between pond/river habitat and predation pressure affected learning rate, and a similar interaction affected temperament behaviours. Two further studies were conducted to address how captive rearing environments and typical handling procedures affect behaviour in different species. Rearing environment affected memory, but not learning or temperament behaviours in three-spined sticklebacks. Handling caused stress responses in three-spined sticklebacks, Panamanian bishops (Brachyraphis episcopi) and Rainbow trout (Oncorhynchus mykiss), but handling with a water filled scoop compared to a traditional dip-net decreased these responses in three-spined sticklebacks and Panamanian bishops, and also affected behaviour in Panamanian bishops. The results presented in this thesis suggest that ecological variables play a substantial role in shaping learning, memory and other behavioural traits in fish, and highlight the utility of behavioural assays in answering welfare-based questions.

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Hartikainen, Hanna-Leena. „Freshwater bryozoan abundence, eutrophication and salmonid fish disease“. Thesis, University of Reading, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.493801.

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This research investigates the links between nutrient enrichment, bryozoan abundance and the development of myxozoan parasites in bryozoans. It was found that bryozoan abundances are elevated in nutrient-rich rivers, demonstrating the potential bio-indicator value of bryozoans and predicting increased bryozoan abundances with increased planktonic productivity when space is not limiting. A comprehensive set of laboratory microcosm studies showed also that experimental nutrient enrichment increased growth rates and statoblast production in Fredericella sultana, corroborating the results from field surveys.

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Calta, M. „Early development and gill function in freshwater fish“. Thesis, University of Nottingham, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.307766.

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Bücher zum Thema "Freshwater fish"

Dwight, Kuhn, Hrsg. Freshwater fish. Detroit: Thomson/Gale, 2005.

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Binns, Tristan Boyer. Freshwater fish. Oxford: Heinemann Library, 2007.

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Housby, Trevor. Freshwater fish. London: Grange Books, 1995.

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Freshwater fish. Vero Beach, FL: Rourke Publishing, 2012.

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Greenhalgh, Malcolm. Freshwater fish. London: Mitchell Beazley, 1999.

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Binns, Tristan Boyer. Freshwater fish. Chicago, Ill: Heinemann Library, 2006.

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Cihař, Jiří. Freshwater fish. Leicester: Harvey's Bookshop Ltd. in cooperation with Arcturus Publishing Limited, 1994.

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Housby, Trevor Raymond Laurence. Freshwater fish. London: Grange Books, 1995.

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Ngesa, Odhiambo. Freshwater fish farming. Nairobi: (s.n.), 1990.

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Fliger, James. Freshwater fish carving. West Chester, Pa: Schiffer Pub., 1989.

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Buchteile zum Thema "Freshwater fish"

Skonberg, Denise, und Thomas E. Rippen. „Freshwater Fish“. In The Seafood Industry, 161–71. Oxford, UK: Wiley-Blackwell, 2012. http://dx.doi.org/10.1002/9781118229491.ch14.

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Rippen, Thomas E. „Freshwater Fish“. In The Seafood Industry, 182–93. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4615-2041-2_11.

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Rodger, Robin W. A. „Freshwater Finfish“. In Fish Facts, 97–125. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4684-6506-8_2.

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Bandyopadhyay, Biplab Kumar. „Fish Health Management“. In Freshwater Aquaculture, 282–327. London: CRC Press, 2022. http://dx.doi.org/10.1201/9781003300335-6.

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Haddad, Vidal, Carla Lima und Mônica Lopes-Ferreira. „Venomous Marine Fish: Osteichthyes (Bony Fish)“. In Marine and Freshwater Toxins, 427–43. Dordrecht: Springer Netherlands, 2016. http://dx.doi.org/10.1007/978-94-007-6419-4_10.

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Junior, Vidal Haddad, Carla Lima und Mônica Lopes-Ferreira. „Venomous Marine Fish: Osteichthyes (Bony Fish)“. In Marine and Freshwater Toxins, 1–14. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-6650-1_10-1.

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Haddad, Vidal, Carla Lima und Mônica Lopes-Ferreira. „Venomous Freshwater Fish: Catfish and Freshwater Stingrays“. In Marine and Freshwater Toxins, 445–51. Dordrecht: Springer Netherlands, 2016. http://dx.doi.org/10.1007/978-94-007-6419-4_11.

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Haddad, Vidal, Carla Lima und Mônica Lopes Ferreira. „Venomous Freshwater Fish: Catfish and Freshwater Stingrays“. In Marine and Freshwater Toxins, 1–5. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-6650-1_11-1.

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Haddad, Vidal, Carla Lima und Mônica Lopes-Ferreira. „Venomous Marine Fish: Evolution of the Venoms – Chondrichthyes (Cartilaginous Fish)“. In Marine and Freshwater Toxins, 421–26. Dordrecht: Springer Netherlands, 2016. http://dx.doi.org/10.1007/978-94-007-6419-4_9.

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Haddad, Vidal, Carla Lima und Mônica Lopes-Ferreira. „Venomous Marine Fish: Evolution of the Venoms. Chondrichthyes (Cartilaginous Fish)“. In Marine and Freshwater Toxins, 1–5. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-6650-1_9-1.

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Konferenzberichte zum Thema "Freshwater fish"

Hu, Jiaxin, Ziwang Wang, Xixi Li, Xueqing Li und Dekui He. „Construction of Chinese Freshwater Fish Information Database“. In 2021 IEEE 9th International Conference on Bioinformatics and Computational Biology (ICBCB). IEEE, 2021. http://dx.doi.org/10.1109/icbcb52223.2021.9459237.

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Yu, Zhang, Zhang Kewei und Hu Zhigang. „Research on head orientation equipment of freshwater fish“. In EBIMCS 2020: 2020 3rd International Conference on E-Business, Information Management and Computer Science. New York, NY, USA: ACM, 2020. http://dx.doi.org/10.1145/3453187.3453381.

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„Phylogenetic Relationships of Freshwater Fish in Vietnamese Mekong“. In International Conference on Biological, Environment and Food Engineering. International Institute of Chemical, Biological & Environmental Engineering, 2015. http://dx.doi.org/10.15242/iicbe.c0515014.

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Jun, Zhang, Li XiaoYu, Wang Wei, Zhou Zhu, Zhou Wei und Xiao Wu. „Determination Freshwater Fish Freshness with Gas Sensor Array“. In 2009 WRI World Congress on Computer Science and Information Engineering. IEEE, 2009. http://dx.doi.org/10.1109/csie.2009.330.

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W.G.A., Udeshika, Jathunarachchi R.T., Nawagamuwa N.G.K., Sangeeth L.S., Lokesha Prasadhini Weerasinghe und Gaya Thamali Dassanayake. „Smart System for Freshwater Pisciculture(Ornamental Fish Farming)“. In 2023 14th International Conference on Computing Communication and Networking Technologies (ICCCNT). IEEE, 2023. http://dx.doi.org/10.1109/icccnt56998.2023.10307267.

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A.V., Shokurova, Anishchenko O. V., Kashinskaya E.N. und Solovyev M.M. „THE ELEMENTAL COMPOSITION OF BILE OF SOME MARINE AND FRESHWATER FISH SPECIES AND ITS POSSIBLE PRACTICAL APPLICATION IN AQUACULTURE“. In II INTERNATIONAL SCIENTIFIC AND PRACTICAL CONFERENCE "DEVELOPMENT AND MODERN PROBLEMS OF AQUACULTURE" ("AQUACULTURE 2022" CONFERENCE). DSTU-Print, 2022. http://dx.doi.org/10.23947/aquaculture.2022.29-31.

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The elemental composition of the bile of 429 fish individuals of 21 species of freshwater and marine fish has studied. Macroelements (Ca, K, Mg, Na, P, S), regardless of the diets and habitat of fish, were in the highest concentrations if compare to other elements. However, it is possible to note some differences in the concentrations of such macronutrients as K and Na between marine and freshwater species. Cu, Li and Sr were found in the bile of all studied freshwater species, while bile form marine species has always contained elements such as As, Cu, Li, Se and Sr. At the same time, Bi, Cd, Mo and Tl were absent in most species of both freshwater and marine fishes. Statistical analysis has revealed that such factors as “feeding habits”, “habit”, “season” and “year" had a significant effect on the elemental composition of fish bile. The obtained data of the elemental composition of bile are applicable to the creation of selective artificial nutrient media and species-specific feeds.

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Curto, Manuel, Ana Veríssimo, Filipe Ribeiro, Carlos D. Santos, Sissel Jentoft, Judite Alves und Hugo F. Gante. „Application of eDNA Metagenomics to Describe Freshwater Fish Communities“. In SIBIC 2022. Basel Switzerland: MDPI, 2022. http://dx.doi.org/10.3390/blsf2022013027.

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Wang, Yingjie, Zhigang Hu, Zihan Tu, Zijian Xu, Shangmusi Ma, Yan Chen und Ming Ma. „Freshwater fish shape detection method based on machine vision“. In 2nd International Conference on Signal Image Processing and Communication (ICSIPC 2022), herausgegeben von Deqiang Cheng und Omer Deperlioglu. SPIE, 2022. http://dx.doi.org/10.1117/12.2643512.

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Collares-Pereira, Maria João, Maria Judite Alves, Filipe Ribeiro, Isabel M. Domingos, Pedro Raposo de Almeida, Luís Moreira da Costa, Hugo F. Gante et al. „A First Guide to Freshwater and Diadromous Fish in Portugal“. In SIBIC 2022. Basel Switzerland: MDPI, 2022. http://dx.doi.org/10.3390/blsf2022013142.

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Zhang, Xiaorui, Hongming Chen, Longqing Zhang und Qian Chen. „Research on Freshwater Fish Recognition Based on Improved Random Forest“. In 2023 International Conference on Intelligent Management and Software Engineering (IMSE). IEEE, 2023. http://dx.doi.org/10.1109/imse61332.2023.00023.

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Berichte der Organisationen zum Thema "Freshwater fish"

Vasileva, V. T., T. V. Sleptsova, N. A. Matveev und S. M. Timofeev. BIOLOGICAL VALUE OF FRESHWATER FILLET FATS FISH RIVER YAKUTIA. СФНЦА РАН, 2018. http://dx.doi.org/10.18411/156453-18.

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Bennett, Oliver. Freshwater habitat restoration. Parliamentary Office of Science and Technology, Januar 2024. http://dx.doi.org/10.58248/pn709.

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Freshwater habitats, such as rivers and wetlands, provide major benefits to society through services such as flood risk reduction and drinking water. However, many of these habitats are in a poor condition. They have been damaged by a range of human activities including physical modification and pollution. For example, an estimated 90% of wetlands have been lost over the last century. Restoration of freshwater habitats can be achieved by addressing the causes of degradation and by enhancing or extending habitats. There is good evidence on the benefits of some forms of restoration. For example, restoration can deliver effective flood defence and restore fish populations. However, certain restoration measures are less well-studied. There are numerous national and international targets for the restoration of freshwater habitats. These include a commitment to improving at least 75% of waters to close to their natural state as soon as practicable by 2042. However, some stakeholders believe that these commitments will not be met under current plans in England. There have been calls for various actions including: increased and long-term funding to deliver larger-scale projects changes to policy and legislation to deliver more joined-up decision making and to include small water bodies and headwaters further prevention of degradation, including better enforcement of existing legislation the removal of barriers to nature-based solutions Policy in this area is devolved. For England, the UK Government published a Plan for Water in 2023 that contained new actions to help improve the condition of freshwater habitats. The Office for Environmental Protection will publish an assessment of the Government’s approach in 2024.

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Poston, T. M., und D. C. Klopfer. Literature review of the concentration ratios of selected radionuclides in freshwater and marine fish. Office of Scientific and Technical Information (OSTI), September 1986. http://dx.doi.org/10.2172/5000198.

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Cada, Glenn F., Mark S. Bevelhimer, Allison M. Fortner, Kristina P. Riemer und Peter E. Schweizer. Laboratory Studies of the Effects of Static and Variable Magnetic Fields on Freshwater Fish. Office of Scientific and Technical Information (OSTI), April 2012. http://dx.doi.org/10.2172/1038484.

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Guram, M. S. Development of critical life stage assays: Teratogenic effects of SRS effluent components on freshwater fish, gambusia. Office of Scientific and Technical Information (OSTI), November 1990. http://dx.doi.org/10.2172/6225646.

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Hoy, Michael D. Herons and Egrets. U.S. Department of Agriculture, Animal and Plant Health Inspection Service, August 2017. http://dx.doi.org/10.32747/2017.7208742.ws.

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Herons and egrets commonly cause damage at aquaculture facilities and recreational fishing waters where fish are held at high densities. Fish-eating birds also can have an impact on intensively managed sport fisheries. Damage occurs when herons and egrets feed on fish purchased and released for recreational sport fishing activities. Values of these fish can be quite high given the intensity of management activities and the direct relationship of fishery quality to property value. Herons and egrets are freshwater or coastal birds of the family Ardeidae. Herons and egrets discussed in this section are all piscivorous. They are opportunistic feeders, however, and will consume small amphibians, insects, and reptiles. Due to these food preferences, herons and egrets are attracted to shallow lakes and human-made impoundments. Native bird species are covered under the Migratory Bird Treaty Act (MBTA) and given federal protection. Depredation permits can be obtained through the U.S. Fish and Wildlife Service. In addition, individual states may require their own permits for legal take of these bird species.

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Cnaani, Avner, Gordon Grau, Darren Lerner und Sheenan Harpaz. Gastrointestinal osmoregulatory activity in Tilapia and its effects on growth, an opportunity for fish diet developments. United States Department of Agriculture, Juli 2014. http://dx.doi.org/10.32747/2014.7594393.bard.

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Fish living in freshwater and seawater environments experience constant osmotic pressure between their internal body and the surrounding water. Regulation of ion and water balance under these conditions is highly energetic demanding, and eventually, affects the fish growth. While the role of the gills in osmoregulation was extensively studied, the osmoregulatory activity of the gastrointestinal tract is less known. In this study we characterized the tilapia intestine as a multifunctional organ, having a role in both nutrition and in ion regulation. We studied the pituitary endocrine regulation of intestinal salinity adaptation, the salinity-dependent physiological activity along different intestinal sections, and specific genes that are linking nutrient absorption with ion and acid-base regulation. The results of this study indicate that different intestinal sections developed various specific activities. Their endocrine regulation is now better understood, a large data-set of salinity dependent gene transcript was developed, as well as new tools and methods to study new aspects of intestinal physiology.

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Bartolino, Valerio, Birgit Koehler und Lena Bergström, Hrsg. Climate effects on fish in Sweden : Species-Climate Information Sheets for 32 key taxa in marine and coastal waters. Department of Aquatic Resources, Swedish University of Agricultural Sciences, 2023. http://dx.doi.org/10.54612/a.4lmlt1tq5j.

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The purpose of this publication is to summarize the state of knowledge on the effects of environmental variability and climate change for individual species and stocks based on literature review, giving species-climate information for 32 key taxa in Swedish marine and coastal waters. The report is written in English. The extent and scale of recent changes in climate due to global warming is unprecedented and causes increasing effects on ecosystems. In oceans, ongoing warming leads to, for example, increased water temperatures, decreased ice cover and effects on hydrology and water circulation patterns that can in turn influence salinity. The environmental alterations affect species distribution, biology, and hence also the delivery of marine ecosystem services and human well-being. The results of this review on the effects of environmental variability and climate change on marine taxa are presented as species-climate information sheets designed in a user-friendly format aimed to enhance accessibility for professionals spanning different fields and roles, including e.g. scientific experts, NGOs affiliates and managers. The species-climate information sheets presented here cover 32 key taxa selected among the economically and ecologically most important coastal and marine fish and crustacean species in Swedish waters. The species-wise evaluations show that climate change leads to a wide range of effects on fish, reflecting variations in their biology and physiological tolerances. The review also highlights important data and knowledge gaps for each species and life stage. Despite the high variability and prevailing uncertainties, some general patterns appeared. On a general level, most fish species in Swedish marine and coastal waters are not expected to benefit from climate change, and many risks are identified to their potential for recruitment, growth and development. Boreal, marine and cold-adapted species would be disadvantaged at Swedish latitudes. However, fish of freshwater origin adapted to warmer temperature regimes could benefit to some extent in the Baltic Sea under a warming climate. Freshwater fish could also be benefitted under further decreasing salinity in the surface water in the Baltic Sea. The resulting effects on species will not only depend on the physiological responses, but also on how the feeding conditions for fish, prey availability, the quality of essential fish habitats and many other factors will develop. A wide range of ecological factors decisive for the development of fish communities are also affected by climate change but have not been explored here, where we focused on the direct effects of warming. The sensitivity and resilience of the fish species to climate change will also depend on their present and future health and biological status. Populations exposed to prolonged and intense fishing exploitation, or affected by environmental deterioration will most likely have a lower capacity to cope with climate change effects over time. For both the Baltic Sea and the North Sea, it is important to ensure continued work to update and improve the species-climate information sheets as results from new research become available. It can also be expected that new important and relevant biological information and improved climate scenarios will emerge continuously. Continued work is therefore important to update and refine the species-climate information sheets, help filling in currently identified knowledge gaps, and extend to other species not included here. Moreover, there is need to integrate this type of species-level information into analyses of the effects of climate change at the level of communities and ecosystems to support timely mitigation and adaptation responses to the challenges of the climate change.

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Winter, H. V., A. B. Griffioen, L. A. J. Nagelkerke, M. Valkenaars, M. Kooiman, N. Dijkstra und P. G. M. Heuts. Regional connectivity and movements of freshwater fish in the Langbroekerwetering, a weir-regulated water system with De Wit fishways : A LIFE-IP study using PIT telemetry. IJmuiden: Wageningen Marine Research, 2022. http://dx.doi.org/10.18174/575905.

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Guram, M. S., und B. Boatwright. Development of critical life stage assays: Teratogenic effects of ash basin effluent components on freshwater fish, gambusia affinis and daphnia: Progress report, 21 May 1988--1 June 1989. Office of Scientific and Technical Information (OSTI), April 1989. http://dx.doi.org/10.2172/6022244.

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