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Academic literature on the topic 'Fish Mortality'

Author: Grafiati

Published: 4 June 2021

Last updated: 17 February 2022

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Journal articles on the topic "Fish Mortality"

1

Ellis, Tim, Iain Berrill, Jeff Lines, James F. Turnbull, and Toby G. Knowles. "Mortality and fish welfare." Fish Physiology and Biochemistry 38, no. 1 (September 16, 2011): 189–99. http://dx.doi.org/10.1007/s10695-011-9547-3.

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Suprayitno, Eddy. "THE INFLUENCE OF FISH MORTALITY ON THE FRESHNESS OF FISH." International Journal of Research -GRANTHAALAYAH 6, no. 2 (February 28, 2018): 80–85. http://dx.doi.org/10.29121/granthaalayah.v6.i2.2018.1547.

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Fish is one of the freshly prepared high-protein foodstuffs. Fish protein needs by the body to speed up the digestion process by the similar function as human proteins. Protein has a function as growth, regulatory and former energy. Moreover, fish is the perishable product which is easy to spoil and cause decreasing quality. One of the factors that the caused the decreasing quality of fish is death method. Where fish that the long process of decay death proved more rapid than the fish that quickly intervening died calmly. This research was conducted to investigate the effect of fish mortality on the old phase of deterioration in fish quality. The method was used in this experiment was Completely Randomized Design (CRD) with 6 treatments rooms is left alone, the medulla oblongata stabbed, beaten hard objects, broken spine, given freshwater ice, and smeared with kluwak. The result showed that there was no significant effect (P> 0.05) on the phase of deterioration of fish quality. Which is the longest phase of fish deterioration in the treatment of fish stabbed medulla oblongata with an average value of 2137.8 minutes.

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Hedström, Per, David Bystedt, Jan Karlsson, Folmer Bokma, and Pär Byström. "Brownification increases winter mortality in fish." Oecologia 183, no. 2 (December 3, 2016): 587–95. http://dx.doi.org/10.1007/s00442-016-3779-y.

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FOTIS (Γ. ΦΩΤΗΣ), G., and I. KIRKOUDIS (Ι. ΚΥΡΚΟΥΔΗΣ). "Clostrìdìum botulinum - A cause of fish mortality." Journal of the Hellenic Veterinary Medical Society 52, no. 1 (January 31, 2018): 65. http://dx.doi.org/10.12681/jhvms.15409.

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Clostridium botulinum type E proliferates in dead aquatic animals and sediments and it is distributed by water currents and infected fish. Botulism is a disease with great significance for both aquacultured fish and humans. The existing data about the subject are very few, and the aim of the present paper is to warn fish farmers and pathologists about the possibility of outbreaks in Greece.

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JANCIN, BRUCE. "Fish Oil Cuts Heart Failure Morbidity, Mortality." Internal Medicine News 41, no. 19 (October 2008): 36. http://dx.doi.org/10.1016/s1097-8690(08)71105-3.

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Auld, Garry. "Fish consumption and cardiovascular mortality in Canada." Journal of Nutrition Education 21, no. 1 (February 1989): 10. http://dx.doi.org/10.1016/s0022-3182(89)80229-8.

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TARAZONA, J. V., MaJ MUŃOZ, J. A. ORTIZ, MaO NUNÉZ, and J. A. CAMARGO. "Fish mortality due to acute ammonia exposure." Aquaculture Research 18, no. 2 (April 1987): 167–72. http://dx.doi.org/10.1111/j.1365-2109.1987.tb00135.x.

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Nandan, S. Bijoy, and P. K. Abdul Azis. "Fish Mortality from Anoxia and Sulphide Pollutions." Journal of Human Ecology 6, no. 2 (May 1995): 97–104. http://dx.doi.org/10.1080/09709274.1995.11907139.

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Craig, J. F. "Aging in fish." Canadian Journal of Zoology 63, no. 1 (January 1, 1985): 1–8. http://dx.doi.org/10.1139/z85-001.

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Theories on aging are well advanced but empirical data lag far behind them mainly because few fish populations are unexploited and are allowed to reach old age. There is more evidence supporting the theory of genetic aging controlled by a biological clock than aging by random damage, but the two are probably interconnected. Growth and natural mortality are closely correlated between and within species and populations. Fast growth and early maturity curtail the life-span; slow growth and late maturity have the reverse effect. There appears to be a trade-off between reproductive effort and longevity to ensure the production of the maximum number of progeny over the life-span of the mature adults. This trade-off is influenced by a feedback system dependent on reproductive success. Genetic control of growth and thus mortality is not well understood and is obscured by environmental factors. Anatomical and physiological changes with age are similar to those of mammals and include the appearance of malignant tumors. Changes in growth and natural mortality have an important influence on yield and recruitment in fisheries. The understanding of aging processes lies in an improved knowledge of bioenergetic processes and the environmental factors that control them.

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Septiyawati, Septiyawati, Muhammad Fauzi, and Deni Efizon. "Analisis dinamika populasi ikan selar kuning (Selaroides leptolepis) dalam upaya pengelolaan sumberdaya ikan pelagis kecil di perairan Bintan, Provinsi Kepulauan Riau." Depik 9, no. 3 (October 9, 2020): 428–34. http://dx.doi.org/10.13170/depik.9.3.17351.

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This raw fish is used as fisheries products such as salted fish, grilled fish, fishmeal and surimi. This study aims to analyze mortality and recruitment of yellowstipe scad (Selaroides leptolepis) and the information about management of small pelagic fisheries resources in Bintan Waters. This research was carried out in February-June 2019 at the Barek Motor Fish Landing Area (TPI) with fishing areas in Bintan waters. The number of fish studied was 2.550 with a length of 102-215 mm and a weight of 15-102 gr. The highest recruitment peak occurred in Mei of 18.11% and June of 19.48%. The highest and lowest condition factors are 0.83 and 1.09. The total mortality rate (Z) of yellow strait fish is 4.61 per year with a natural mortality rate (M) of 1.66 per year and the capture mortality rate of 2.95 per year so that the exploitation rate is 0.63. The death of yellowstipe scade in the Bintan Sea most of the caused by fishing activities (F) of 2.95 per year.Keywords:Yellowstipe scad Bintan WatersRecrutmentCondition factorsMortalityABSTRAKIkan selar kuning merupakan salah satu jenis ikan ekonomis penting. Ikan ini banyak dimanfaatkan sebagai bahan baku produk olahan perikanan seperti ikan asin, ikan bakar, pindang, tepung ikan dan surimi. Penelitian ini bertujuan untuk menganalisis, mortalitas dan rekrutmen ikan selar kuning (Selaroides leptolepis) dan informasi tentang pengelolaan sumberdaya ikan pelagis kecil di Perairan Bintan. Penelitian ini telah dilaksanakan bulan Februari-Juni 2019 di Tempat Pendaratan Ikan (TPI) Barek Motor dengan wilayah penangkapan di perairan Bintan. Jumlah ikan yang diteliti 2.550 ekor dengan panjang 102-215 mm dan berat 15-102 gr. Puncak rekrutmen tertinggi terjadi bulan Mei sebesar 18,11% dan Juni sebesar 19,48%,. Nilai tertinggi dan terendah faktor kondisi yaitu 0,82 dan 1,09. Laju mortalitas total (Z) ikan selar kuning 4,61 per tahun dengan laju mortalitas alami (M) 1,66 per tahun dan laju mortalitas penangkapan 2,95 per tahun sehingga diperoleh laju eksploitasi 0,63. Kematian ikan selar kuning di laut Bintan sebagian besar diakibatkan oleh aktivitas penangkapan (F) sebesar 2,95 per tahun.Kata kunci:Ikan selar kuning Perairan Bintan Rekrutmen Faktor kondisi Mortalitas

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Dissertations / Theses on the topic "Fish Mortality"

1

Wang, Man-ping. "Fish consumption and mortality in Hong Kong Chinese : the lifestyle and mortality study (LIMOR) /." View the Table of Contents & Abstract, 2007. http://sunzi.lib.hku.hk/hkuto/record/B38588432.

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Soares, Silvia. "Fish farm health evaluation : interpretation of site mortality records." Thesis, University of Stirling, 2012. http://hdl.handle.net/1893/9268.

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In aquaculture worldwide, diseases are a significant constraint to economic expansion. The Scottish salmonid industry has experienced many cycles of development, with episodes of little or negative profitability caused by excess of production, and times of crisis due to different disease problems. In Scotland, the early implementation of regulation largely contributed to the control of infectious disease outbreaks. The recent Chilean outbreak of infectious salmon anaemia (ISA) illustrated the threats and the impacts of disease in the aquaculture industry and the importance of implementing good regulation and husbandry practices to reduce the impact of the spread of infectious disease. Databases of site production data have an important role to play in the investigation and understanding of diseases. They store valuable data collected during the time of production, which are essential for the identification of potential health and production problems during the production cycle of farmed fish. Mortality records are one of the most important sources of information on a farm, especially if it includes the cause of death as deformities, predators and diseases. Any deviation from the expected levels of mortality may indicate production problems, infectious diseases, or inadequate welfare. The investigation of increased rates of mortality must include examining farm records, determining the influence of death rate on production and the potential risk factors of diseases in a farm. This project demonstrated the importance of mortality records for setting industry standards of “expected” mortality losses and for investigating the value of recorded mortalities as a tool for aiding in surveillance and control of infectious diseases. It also aimed to determine the utility of reported mortality in supporting and assisting management-strategy decisions at the farm and industry level. In this project, we developed a baseline benchmark curve for expected mortality losses for Atlantic salmon in seawater. This novel approach constitutes a first attempt to establish a baseline curve for normal mortality, which allows detection of potential production problems based on deviations of mortality from the baseline curve of normal mortality. The results of this study also indicated that mortality levels may vary across production cycles, which can again be identified by using the baseline. We found that site was the factor with the highest contribution to variance in mortality. This site-to-site variation in mortality may have resulted from epidemics and environmental incidents, or other local event/effects. Temperature, and/or geographical area were also characteristics that contribute to variation in mortality. The regulator, Marine Scotland Science, with the backing and support of the salmonid industry has suggested potential mortality thresholds as an indicator of presence of infectious diseases, which could be used as alerts for inspection by the official authority. In this study, high mortality rates on fish farms were investigated as an indicator of the presence of infectious disease. The analysis was performed using several analytical approaches: receiver operating characteristic (ROC) curve analysis, measures of sensitivity and specificity, and bootstrap methods. The study was performed by splitting the production cycle into small fish with mean weight below 750 g and large fish with mean weight over 750 g. In the small fish, the results did not suggest reported mortality as a strong indicator of the presence of infectious disease, which may be caused by the lack of records of infectious disease at this stage of the production cycle. In the larger fish, high mortality rates were found to be a strong potential indicator of the presence of infectious diseases, including the suggested mortality threshold. In a survey, the role of traditional diagnosis in the prevention and control of disease outbreaks was assessed. For that, key informant interviews were performed with open questions to the health or farm manager of several trout and Atlantic salmon farms and we also used the diagnostic reports of the Veterinary Diagnostic Services (VDS) from Stirling University to triangulate the data. We showed that disease diagnoses are of great importance for disease identification and control of actual diseases. Farmer’s experience was also indicated as essential in the identification of the first signs of disease, which was principally through the daily monitoring of fish. This study suggested that disease diagnosis starts at the farm level with the daily monitoring of fish and the records of different parameters by the farmer, including mortality. Those records were showed to be vital to identify problems within the production. This thesis illustrated a novel approach to investigate and interpret recorded mortality at the farm level. The results presented in this thesis indicated reported mortality as a vital on-farm tool for identification of diseases and production problems. This thesis suggested priority areas where further investigation is required.

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Wang, Man-ping, and 王文炳. "Fish consumption and mortality in Hong Kong Chinese: the lifestyle and mortality study (LIMOR)." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B39724621.

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Ellis, Timothy Roberts. "Production and mortality of early life stages of flatfishes." Thesis, University of Liverpool, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.386805.

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Plankton sampling established the presence of a plaice spawning ground off the west coast of the Isle of Man in the Irish Sea. The total production of stage I plaice eggs from this spawning ground in 1993 was estimated at 7.6 x 101 • Theoretically this spawning ground could supply the local nurseries with plaice larvae. Spawning was most intense in March, before the peak in the plankton bloom in the Irish Sea. Predation on plaice eggs by clupeids was studied in March in an area of high plaice egg density to the east of the Isle of Man. Fish eggs formed the bulk of the stomach contents of sprat and herring due to the lack of alternative zooplankton food at this time of year. The later developmental stages of plaice eggs were more vulnerable to predation. This was thought to be due to the increase in pigmentation with embryonic development increasing the contrast between the egg and the water to predators that detect prey visually. Sprat and herring >80 mm showed a strong selection for plaice eggs over smaller pelagic fish eggs. However, the large eggs of plaice had a refuge in size from predation by sprat <80 mm. Smaller clupeids were feeding more actively than larger clupeids, as indicated by stomach fullness and the total number of fish eggs in stomachs. Stomach content data was combined with published biomass estimates and the daily instantaneous mortality rate of plaice eggs due to predation was estimated at 0.023 for sprat and 0.001 for herring. Sprat were therefore an important predator of plaice eggs in the Irish sea, whereas herring seemed of limited significance. Predation by fishes on O-group flatfishes was studied on a Scottish nursery ground by stomach content analysis. Fish predation was shown to be a significant source of mortality and I-group grey gurnards and gadoids were the major predators. Flounder suffered higher predation rates than plaice or dab due to the smaller size at settlement. Predation on plaice and dab was size-selective, concentrated on the smaller individuals. Smaller flatfishes were vulnerable to a greater size range and greater taxonomic range of predators. Predation by O-group cod on O-group dab was limited by the sizes of predator and prey. It was hypothesised that the times of recruitment of flatfishes and their predators to nurseries, and relative growth rates, would affect predation and hence mortality. The handling time of O-group flatfishes by O-group cod in laboratory experiments was positively related to flatfish size and negatively related to cod size. The handling time of plaice was longer than for dab of a similar size due to the difference in body shape. Profitability of flatfishes (wet weight gained per unit handling time) decreased monotonically with flatfish size over the range of prey and predator sizes used. It was therefore predicted that when O-group cod forage in the field the smallest O-group flatfishes would be the most profitable and would be behaviourally selected for. However, the selection of prey by cod was suggested to be determined by both behavioural and physical processes. There was evidence that behavioural selection of prey occurred at the ingestion stage of feeding. The current evidence for density-dependent processes in the juvenile stage of plaice was reviewed. Both the data in support of, and the processes thought to cause, density-dependent mortality in the juvenile phase were equivocal. It was hypothesised that density-dependent mortality occurs in the early egg stages of plaice and evidence, and the rationale for a potential predatory process resulting in such mortality, were presented.

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Alhossaini, Mohsen S. M. H. "Growth and mortality of 0-group plaice, Pleuronectes platessa L., using otolith microstructure." Thesis, Bangor University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.352946.

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Breen, Michael. "Investigating the mortality of fish escaping from towed fishing gears - a critical analysis." Thesis, University of Aberdeen, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.493592.

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Studies investigating the survival of fish escaping from towed fishing gears have demonstrated a significant mortality. The aim of this thesis was to address criticisms of these studies and establish whether the estimates of escape mortality were biased. This critical analysis focused on the work by Fisheries Research Services, as they were considered to have developed benchmark techniques in this field.

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Williamson, Craig W. "Tournament-associated mortality and the effects of culling in Wisconsin black bass (Micropterus spp.) tournaments /." Link to full text, 2007. http://epapers.uwsp.edu/thesis/2007/williamson.pdf.

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Thesis (M.S.)--University of Wisconsin--Stevens Point, 2007.
Submitted in partial fulfillment of the requirements of the degree Master of Science in Natural Resources, College of Natural Resources. Includes bibliographical references (leaves 75-81).

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Adams, Michael J. "Experimental analysis of tadpole mortality factors : effects of bullfrogs and exotic fish in the Puget Lowlands, Washington /." Thesis, Connect to this title online; UW restricted, 1997. http://hdl.handle.net/1773/5507.

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Subasinghe, R. P. "Studies on the effects of environmental factors and selected pathogens on morbidity and mortality of hatchery reared Oreochromis mossambicus (Peters) eggs and fry." Thesis, University of Stirling, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375402.

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Sclafani, Matthew. "The role of osmoregulation and nutrition as determinants of buoyancy and short-term mortality of marine fish larvae." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0033/NQ64664.pdf.

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Books on the topic "Fish Mortality"

1

Suuronen, Petri. Mortality of fish escaping trawl gears. Rome, Italy: Food and Agriculture Organization of the United Nations, 2005.

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Ruggles, C. P. Fish passage mortality in a tube turbine. Halifax, N.S: Dept. of Fisheries and Oceans, Biological Sciences Branch, 1989.

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Stuby, Lisa Ann. Mortality of sheefish captured and released on sport fishing gear in the Kobuk River, 1997. Anchorage: Alaska Dept. of Fish and Game, Division of Sport Fish, Research and Technical Services, 1998.

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4

Guðmundsson, Guðmundur. Time series models of fishing mortality rates. Reykjavík: Science Institute, University of Iceland, 1987.

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5

Brodziak, Jon K. T. Estimating natural mortality in stock asssessment applications: August 11-13, 2009, Alaska Fisheries Science Center, Seattle, WA. Silver Spring, MD: Office of Science and Technology, F/ST, National Marine Fisheries Service, NOAA, 2011.

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Guillen, George. Klamath River fish die-off, September 2002: Causative factors of mortality. Arcata, Calif: U.S. Fish and Wildlife Service, Arcata Fish and Wildlife Office, 2003.

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Guillen, George. Klamath River fish die-off, September 2002: Report on estimate of mortality. Arcata, Calif: U.S. Fish and Wildlife Service, Arcata Fish and Wildlife Office, 2003.

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8

Harding, Roger D. Evaluation of short-term handling and tagging mortality of cutthroat trout at Florence Lake, southeast Alaska, 1998. Anchorage: Alaska Dept. of Fish and Game, Division of Sport Fish, 1999.

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Anderson, Jon D. Results of the South Puget Sound coho test fishery, 1985-1990. [Olympia, Wash.]: State of Washington, Dept. of Fisheries, 1992.

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Harding, Roger D. Evaluation of short-term handling and tagging mortality of cutthroat trout at Florence Lake, southeast Alaska, 1998. Anchorage: Alaska Dept. of Fish and Game, Division of Sport Fish, 1999.

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Book chapters on the topic "Fish Mortality"

1

Ellis, Tim, Iain Berrill, Jeff Lines, James F. Turnbull, and Toby G. Knowles. "Mortality and fish welfare." In Current Views on Fish Welfare, 189–99. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-5383-9_12.

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Beverton, Raymond J. H., and Sidney J. Holt. "Natural Mortality." In On the Dynamics of Exploited Fish Populations, 67–75. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-2106-4_7.

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Beverton, Raymond J. H., and Sidney J. Holt. "Fishing Mortality and Effort." In On the Dynamics of Exploited Fish Populations, 75–96. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-2106-4_8.

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Beverton, Raymond J. H., and Sidney J. Holt. "Separate Estimation of Fishing and Natural Mortality Coefficients." In On the Dynamics of Exploited Fish Populations, 183–244. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-2106-4_14.

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Melnychuk, Michael C., David W. Welch, Carl J. Walters, and Villy Christensen. "Riverine and early ocean migration and mortality patterns of juvenile steelhead trout (Oncorhynchus mykiss) from the Cheakamus River, British Columbia." In Developments in Fish Telemetry, 55–65. Dordrecht: Springer Netherlands, 2007. http://dx.doi.org/10.1007/978-1-4020-6237-7_7.

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Beverton, Raymond J. H., and Sidney J. Holt. "Estimation of the Total Mortality Coefficient (F + M), and the Maximum Age, tλ." In On the Dynamics of Exploited Fish Populations, 178–83. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-2106-4_13.

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Puybareau, Élodie, Marc Léonard, and Hugues Talbot. "An Automated Assay for the Evaluation of Mortality in Fish Embryo." In Lecture Notes in Computer Science, 110–21. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-18720-4_10.

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Vanni, Michael J., Chris Luecke, James F. Kitchell, and John J. Magnuson. "Effects of planktivorous fish mass mortality on the plankton community of Lake Mendota, Wisconsin: implications for biomanipulation." In Biomanipulation Tool for Water Management, 329–36. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-017-0924-8_27.

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Marçalo, Ana, Mike Breen, Maria Tenningen, Iñigo Onandia, Luis Arregi, and Jorge M. S. Gonçalves. "Mitigating Slipping-Related Mortality from Purse Seine Fisheries for Small Pelagic Fish: Case Studies from European Atlantic Waters." In The European Landing Obligation, 297–318. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-03308-8_15.

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Beverton, R. J. H., and S. J. Holt. "A Review of the Lifespans and Mortality Rates of Fish in Nature, and Their Relation to Growth and Other Physiological Characteristics." In Ciba Foundation Symposium - The Lifespan of Animals (Colloquia on Ageing, Vol. 5), 142–80. Chichester, UK: John Wiley & Sons, Ltd, 2008. http://dx.doi.org/10.1002/9780470715253.ch10.

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Conference papers on the topic "Fish Mortality"

1

van Esch, Bart. "Injury and Mortality to Fish Passing Through Pumping Stations." In ASME-JSME-KSME 2011 Joint Fluids Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajk2011-06015.

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An unwanted side effect of pumping stations is that fish suffer from injury and mortality when passing through the pumps and that fish migration is hampered. In recent years, the development of so-called “fish-friendly pumping stations” is becoming a hot topic among European governmental institutions and pump manufacturers. In the Netherlands, many field studies have been conducted over the last decade, to assess the chances of survival for fish passing through pumps. However, a clear correlation between observed injury or mortality and (for example) flow rate, shaft speed or pump type could not be established. This paper presents a new analysis of the above mentioned field studies. It makes use of American studies on the biological criteria for fish injury, the most important of which are pressure changes, shear forces, and mechanical injury. A blade strike model was adapted to fish passing through centrifugal pumps of radial, mixed-flow, and axial type. It reveals the relation between fish injury and the type of pump, its size, shaft speed, and pressure head. The results correlate well with experiments. The flow through a typical mixed-flow pump is calculated using CFD. The results show that pressure fluctuations and shear forces are not likely to add to fish mortality. The paper concludes with guidelines for the design and selection of “fish-friendly pumps” in pumping stations.

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Gomes, Chandima, Munir Ahmed, and Diana Zele. "Lightning related fish mortality: Case study From Bangladesh." In 2012 International Conference on Lightning Protection (ICLP). IEEE, 2012. http://dx.doi.org/10.1109/iclp.2012.6344259.

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Ishimatsu, Atsushi, Masahiro Hayashi, Takashi Kikkawa, and Jun Kita. "Effects of CO2 Ocean Sequestration on Marine Fish." In 25th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/omae2006-92198.

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Ocean sequestration of CO2 has been proposed as a possible measure to retard the increasing rate of the atmospheric CO2 concentration. Since some negative impacts on marine animals and ecosystems are likely to ensue, we must carefully investigate biological effects of ocean CO2 sequestration before embarking on this mitigation practice. Considering the expected depths for CO2 ocean sequestration (> 1,000 m), it is desirable to use deep-sea animals for the experimental assessment of CO2 ocean sequestration. In addition, experimental protocols preferably mimic environmental conditions at the releasing site: CO2 concentrations vary due to mixing with surrounding seawater at low temperatures (0–2 °C) and under high pressures. This paper describes our recent experiments to elucidate the effects of high CO2 on marine fishes. A deep-sea fish Careproctus trachysoma (habitat depth 400–800 m) can be captured alive and be used for in vivo CO2 exposure experiments. 100% mortality occurred when the fish was exposed to seawater equilibrated with a gas mixture containing 3% CO2 conditions at 2 °C within 48 h, whereas mortality was never observed when shallow-water fishes (Mustelus manazo, Paralichthys olivaceus and Seriola quinqueradiata) were tested under the same CO2 conditions but at higher temperatures (17–20 °C). It is currently not clear whether this difference in mortality is due to often presumed high susceptibility of deep-sea organisms to environmental perturbations. Subsequent experiments demonstrated that low water temperature accelerates mortality by CO2 exposure. Thus, half lethal time decreased from 105h to only 5 h when water temperature was decreased from 26 °C to 20 °C (CO2 8.5%, Sillago parvisquamis). Therefore, the high CO2 susceptibility of C. trachysoma could be solely due to low water temperature. Temporally varying CO2 conditions resulted in markedly different mortality patterns when compare with mortality recorded under constant CO2 conditions. Step-wise increases in ambient CO2 resulted in much lower mortalities than under one-step increases to the same CO2 levels. Further, a sudden drop of CO2 from 9–10% CO2 to air level (0.038%) killed all the surviving fish within a few minutes.

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Inoue, Kojiro, Reagan Septory, Hatim Albasri, and Masaaki Wada. "Mass Mortality Risk Prediction and Fish Loss Simulation in Mariculture." In Global Oceans 2020: Singapore - U.S. Gulf Coast. IEEE, 2020. http://dx.doi.org/10.1109/ieeeconf38699.2020.9389204.

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VREEKEN, J., and M. R. HARDEMAN. "FISH AND PLATELETS." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1643404.

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The effect of two different amounts of a fish oil, corresponding to 0.75 g (2.5 mmol) and 1.5 g (5 mmol) of eicosapentaenoic acid respectively, added in a cross-over design to the normal diet of 16 healthy male volunteers, was studied. Of the various parameters investigated, the most important appeared to be a new test: “Transient Aggregation Resistance” (TAR) of platelets, a phenomenon which, due to its short half life, is hardly measured when platelet aggregation is studied according to the classic method (see M.R.Hardeman, TAR determination, this congress). Under the influence of fish oil, the half life of TAR was found significantly prolonged. This prolongation, however, was not related to the amount of fish oil used. A highly significant decrease of triglycerides was found, the effect being most pronounced in subjects with triglycerides starting values >1.0 uM. This decrease was related to the amount of fish oil used. These.results may cast light on controversies found in literature concerning the effect of fish oil on platelet aggregation . They can also help to clarify controversies about the effect of fish consumption on cardiac mortality.

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Simonsen, T., Å. Vårtun, V. Lyngmo, and A. Nordθy. "CORNARY HEART DISEASE, DIET, SERUM LIPIDS, PLATELET FUNCTION AND PLATELET FATTY ACIDS IN TWO POPULATIONS WITH A HIGH AND A LOW INTAKE OF DIETARY FISH." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1643806.

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In the coastal areas of Northern Norway the intake of fish is by tradition high whereas in the inland area it is low. We have examined the mortality of CHD in the period 1975-84 in a coastal community (C) and an inland community (I). In addition we have examined 30 healthy male subjects aged 30-year, selected by random in the two communities. The examination included a dietary survey based on registration and weighing of all dietary items for one week, blood pressure, serum lipids, primary bleeding time, platelet aggregation induced by collagen and fatty acid composition of platelet total phospholipids.The age-adjusted mortality of CHD was significantly higher for age groups 30-70 year in C whereas the opposite was found above 70 years of age. The mean intake of fish per day was 134 g (0.9 g eicosapentaenoic acid-EPA) in C and 53 g (0.25 g EPA) in I. Serum triglycerides was higher in C (p<0.05) whereas totalcholesterol was similar. The primary bleeding time was not different in the two areas. Significantly lower concentrations of collagen was needed to induce 30 and 60% aggregation in platelet rich plasma in C than in I. No significant differences in the content of eicosapentaenoicacid (EPA) was observed in platelet total phospholipid fatty acids. This study has not confirmed that a high intake of fish as a singledietary variant, is associated with a low mortality of CHD. The lack of changes in plasma lipids, platelet fatty acid composition between representative groups from the two populationsindicate that other factors mask the possible beneficial effects of a high fish diet. Furthermore, the daily intake of large amounts of lean fish give only a very moderate increase in dietary intake of EPA.

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Rulifson, R., and M. Dadswell. "Mortality of Fish Passing through Tidal, Low-head Hydropower Turbines and Possible Mitigation Strategies." In OCEANS '87. IEEE, 1987. http://dx.doi.org/10.1109/oceans.1987.1160676.

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Hulson, P. J. F., S. E. Miller, S. C. Dressel, T. J. Quinn II, and K. Van Kirk. "Time-dependent Parameterization of Natural Mortality, Maturity, and Fishing Selectivity: A Case Study Using the Pacific Decadal Oscillation for Pacific Herring (Clupea pallasii) in Sitka Sound, Alaska." In Impacts of a Changing Environment on the Dynamics of High-latitude Fish and Fisheries. Alaska Sea Grant, University of Alaska Fairbanks, 2018. http://dx.doi.org/10.4027/icedhlff.2018.03.

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Javaheri, Amir, Meghna Babbar-Sebens, and Julie D. Alexander. "A Hydrodynamic and Water Quality Model of the Lower Klamath River, California, for the Management of Fish Mortality." In World Environmental and Water Resources Congress 2016. Reston, VA: American Society of Civil Engineers, 2016. http://dx.doi.org/10.1061/9780784479858.051.

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Krakers, L. A., N. P. Kruyt, and H. A. Rutjes. "Full-Scale Validation of a Comprehensive Criterion to Predict Fish-Friendliness of Pumps." In ASME/JSME/KSME 2015 Joint Fluids Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/ajkfluids2015-16450.

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Many pumping stations in drainage & irrigation applications are currently equipped with conventional (not fish friendly designed) pumps. Field tests have been performed [1] for several pump types of a certain size at certain pumping conditions to assess survival rates of fish passing through pumps. In order to compare different pump types of different sizes at different pumping conditions, a general criterion is required. Testing of fish friendliness of pumps is expensive and involves animal tests with living fish for which permits are required. Therefore, pump manufacturers prefer to perform fish friendliness tests for a single pump size. In order to convert such results to other pump sizes, a scaling law is desired. Van Esch [2, 3] made a first attempt to address scaling principles for fish friendliness of pumps. In the current study a general criterion is described to predict fish friendliness of pumps by means of models of mortality rates of fish passing through pumps. The criterion is validated with literature data [1–3] and experimental full-scale test data from the newly developed fish-friendly axial flow concrete volute pump by Flowserve with an impeller diameter of 850 mm. The full-scale tests involved a total of 1800 roach, perch and eel deployed over 7 pumping conditions, including 3 different heads and 5 different rotational speeds. The fish-friendliness criterion includes different aspects that together predict the survival rate of fish passing through pumps. The first and most important contributor is the impeller, which can have an axial, mixed or radial flow design. The criterion involves the leading edge shape of the blades. Secondly, the diffuser or volute is considered, which provides a strike probability with diffuser vanes or volute tongue(s). In case the gap between the trailing edge of the impeller vanes and the leading edge of the diffuser vanes or volute tongue(s) is small relative to the fish size, there is the possibility of a “scissor” effect. Research in the USA for fish friendliness of hydropower turbines [4–7] showed that shear velocity and pressure drops can be of importance. Also cavitation (involves pressure drop & vapor bubble implosions), recirculation and turbulence can influence survival rates. At this stage these flow effects are roughly captured using the pump performance curve. This way, extensive CFD calculations to evaluate detailed flow effects can be avoided. For open impellers, the gap between the impeller vanes and wear ring is included in the criterion. In addition, fish species-dependent effects are taken into account, since fish vary widely in their internal and external building plan. For instance salmonid, percid and cyprinid fish respond differently to the same pump design than for example eel. Sharp edges and rough surfaces (for example caused by cavitation, erosion or corrosion) can also be harmful to fish but are not included at this stage.

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Reports on the topic "Fish Mortality"

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Schram, Edward, and Pieke Molenaar. Direct mortality among demersal fish and benthic organisms in the wake of pulse trawling. IJmuiden: Wageningen Marine Research, 2019. http://dx.doi.org/10.18174/504087.

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Schram, Edward, Pieke Molenaar, and Susan de Koning. Direct mortality among demersal fish and benthic organisms in the wake of pulse trawling. IJmuiden: Wageningen Marine Research, 2021. http://dx.doi.org/10.18174/541793.

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Bevelhimer, Mark S., Brenda M. Pracheil, Allison M. Fortner, and Kendra L. Deck. An Overview of Experimental Efforts to Understand the Mechanisms of Fish Injury and Mortality Caused by Hydropower Turbine Blade Strike. Office of Scientific and Technical Information (OSTI), December 2017. http://dx.doi.org/10.2172/1425338.

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