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Artykuły w czasopismach na temat "Sac-spawning"

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Walker, Mary K., Philip M. Cook, Allan R. Batterman, et al. "Translocation of 2,3,7,8-Tetrachlorodibenzo-p-dioxin from Adult Female Lake Trout (Salvelinus namaycush) to Oocytes: Effects on Early Life Stage Development and Sac Fry Survival." Canadian Journal of Fisheries and Aquatic Sciences 51, no. 6 (1994): 1410–19. http://dx.doi.org/10.1139/f94-141.

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There were no signs of overt toxicity in sexually mature female lake trout (Salvelinus namaycush) exposed to either a control or a 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD)-containing diet for 11 wk prior to spawning. At spawning the maternally derived egg TCDD concentrations were 42 ± 4 and 43 ± 6% of the maternal skeletal muscle TCDD concentration on a lipid and wet weight basis, respectively. Egg TCDD concentrations of 233–387 pg TCDD/g egg (wet weight) resulted in nonviable oocytes, while concentrations of 50–152 pg/g resulted in a dose-related increase in sac fry mortality associated wit
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Hinrichsen, H.-H., K. Hüssy, and B. Huwer. "Spatio-temporal variability in western Baltic cod early life stage survival mediated by egg buoyancy, hydrography and hydrodynamics." ICES Journal of Marine Science 69, no. 10 (2012): 1744–52. http://dx.doi.org/10.1093/icesjms/fss137.

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Abstract Hinrichsen, H-H., Hüssy, K., and Huwer, B. 2012. Spatio-temporal variability in western Baltic cod early life stage survival mediated by egg buoyancy, hydrography and hydrodynamics. – ICES Journal of Marine Science, 69: 1744–1752. To disentangle the effects of different drivers on recruitment variability of marine fish, a spatially and temporally explicit understanding of both the spawning stock size and the early life stage dynamics is required. The objectives of this study are to assess the transport of western Baltic cod early life stages as well as the variability in environmental
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Hinrichsen, Hans-Harald, Christoph Petereit, Anders Nissling, Isa Wallin, Didzis Ustups, and Ann-Britt Florin. "Survival and dispersal variability of pelagic eggs and yolk-sac larvae of central and eastern baltic flounder (Platichthys flesus): application of biophysical models." ICES Journal of Marine Science 74, no. 1 (2016): 41–55. http://dx.doi.org/10.1093/icesjms/fsw163.

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A hydrodynamic model coupled with a Lagrangian particle tracking technique was utilized to simulate spatially and temporally resolved long-term environmentally related (i) size of habitat suitable for reproduction, (ii) egg/yolk-sac larval survival, (iii) separation of causes of mortality, and (iv) connectivity between spawning areas of Baltic flounder with pelagic eggs. Information on reproduction habitat requirements and mortality sources were obtained from field or laboratory studies. In our modelling study we only quantified physical processes generating heterogeneity in spatial distributi
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Beer, W. Nicholas, and James J. Anderson. "Effect of spawning day and temperature on salmon emergence: interpretations of a growth model for Methow River chinook." Canadian Journal of Fisheries and Aquatic Sciences 58, no. 5 (2001): 943–49. http://dx.doi.org/10.1139/f01-049.

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A mechanistic temperature-dependent model for preemergent growth coupled with spawning and river temperature data is used to evaluate early life history strategies for chinook salmon (Oncorhynchus tshawytscha) in the Methow River, Washington, U.S.A. Since the model provides a predictable coupling between time of spawning and fry emergence, it helps explain the spatial and temporal patterns observed for the sympatric stocks. The model suggests that progeny of August-spawning chinook in upper river habitats emerge at button-up (no visible yolk sac) over a wide range of days in the early spring.
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Roney, Nancy E., Rebekah A. Oomen, Halvor Knutsen, Esben M. Olsen, and Jeffrey A. Hutchings. "Temporal variability in offspring quality and individual reproductive output in a broadcast-spawning marine fish." ICES Journal of Marine Science 75, no. 4 (2017): 1353–61. http://dx.doi.org/10.1093/icesjms/fsx232.

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Abstract The protracted spawning period of broadcast-spawning marine fishes has potential to generate considerable variability in metrics of individual reproductive output. We undertook a temporally detailed genetic study of larvae produced by Atlantic cod (Gadus morhua) from two spatially proximate populations spawning under controlled semi-natural conditions over 94 days. Based on daily samples of larvae (n = 4489 in total), we document fine-scaled temporal changes in, and correlates of, offspring phenotype and reproductive output (egg batches produced or fertilized). Larval length and stand
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Koski, Marja, Rasmus Swalethorp, Sanne Kjellerup, and Torkel Gissel Nielsen. "The mystery of Microsetella: combination of sac- and broadcast-spawning in an Arctic fjord." Journal of Plankton Research 36, no. 1 (2014): 259–64. https://doi.org/10.1093/plankt/fbt117.

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Different life-history stages of the pelagic harpacticoid <em>Microsetella norvegica</em> were sampled in a Greenland fjord, to investigate how this slowly growing species can achieve high abundances at low temperatures. We expected low but continuous reproduction coupled with a low mortality, but observed the opposite: a short reproductive period with high estimated weight-specific egg production and egg mortality, and indication of a life-history strategy combining the advantages of egg carrying with egg production rates independent of temperature.
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Landaeta, Mauricio F., Guillermo A. Herrera, Milton Pedraza, Claudia A. Bustos, and Leonardo R. Castro. "Reproductive tactics and larval development of bigeye flounder, Hippoglossina macrops, off central Chile." Journal of the Marine Biological Association of the United Kingdom 86, no. 5 (2006): 1253–64. http://dx.doi.org/10.1017/s0025315406014263.

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Through a series of ichthyoplankton surveys carried out off central Chile, we characterize the offshore spawning and coastal nursery ground of the bigeye flounder Hippoglossina macrops. Eggs were collected in higher abundances over the continental shelf during late winter, over the shelf-break in mid spring, and at the continental slope in late summer, showing a seasonal depth gradient in spawning. No significant spawning was detected nearshore (less than 8 km offshore). Field data suggest a longitudinal progression from offshore to onshore of larval stages from preflexion to transformation st
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Usvyatsov, Sima, Jeffrey Picka, Ryan Scott Hardy, Travis Dawson Shepherd, James Watmough, and Matthew Kenneth Litvak. "Modeling the timing of spawning and hatching of shortnose sturgeon, Acipenser brevirostrum, in the Saint John River, New Brunswick, Canada." Canadian Journal of Fisheries and Aquatic Sciences 69, no. 8 (2012): 1316–28. http://dx.doi.org/10.1139/f2012-062.

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Timing of spawning and hatching of shortnose sturgeon, Acipenser brevirostrum , in the Saint John River, New Brunswick, Canada, was estimated using inverse prediction. We examined egg incubation periods at 5, 9, and 13 °C to back-calculate spawning dates. No larvae hatched at 5 °C. At 9 and 13 °C, hatching began after 18 and 8 days post fertilization, respectively. Lengths of yolk-sac larvae reared in the laboratory at 13–21 °C were used to develop a temperature-mediated Gompertz growth model. The inverted Gompertz model, predicting larval age from larval size and water temperature, was applie
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Rollinson, Njal, and Jeffrey A. Hutchings. "Why does egg size of salmonids increase with the mean size of population spawning gravels?" Canadian Journal of Fisheries and Aquatic Sciences 68, no. 8 (2011): 1307–15. http://dx.doi.org/10.1139/f2011-069.

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Population mean egg size of salmonids increases with the mean size of gravels in which a population spawns. A long-standing hypothesis is that large larvae cannot navigate small-gravel interstices, so mothers must decrease per-offspring investment when spawning gravels are small. We manipulated the size of incubation gravels and egg size of Atlantic salmon (Salmo salar) to test whether size-related entombment of larvae occurs. We find little evidence of size-related entombment, but we find evidence that gravel size does not affect all larval sizes equally. Larger larvae emerge from small grave
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Alcántar-Vázquez, Juan Pablo, Hugo Skyol Pliego-Cortés, Silvie Dumas, Renato Peña-Martínez, Martín Rosales-Velázquez, and Pablo Pintos-Terán. "Effects of a luteinizing hormone-releasing hormone analogue (LHRHa) on the reproductive performance of spotted sand bass Paralabrax maculatofasciatus (Percoidei: Serranidae)." Latin American Journal of Aquatic Research 44, no. 3 (2017): 487–96. http://dx.doi.org/10.3856/vol44-issue3-fulltext-7.

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Hormonal induction of spotted sand bass Paralabrax maculatofasciatus, was investigated in order to induce and synchronize spawning. Three experiments were conducted using wild fish captured in the Gulf of California: 1) LHRHa (luteinizing hormone-releasing hormone analogue) induced spawning with concentrations of 25, 50, 100 µg kg-1 and saline solution, 2) Effects of LHRHa on motility and sperm density, and 3) Induction and incubation of spawns obtained using LHRHa. In experiments 2 and 3 using concentrations of 12.5, 25, 50 µg kg-1 and saline solution. In experiment 1, a higher spawning ratio
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Książki na temat "Sac-spawning"

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Day, Dwane E. Changes in the natural mortality rate of the S.E. Strait of Georgia sac roe spawning stock, 1976-1985. Washington Dept. of Fisheries, 1987.

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Części książek na temat "Sac-spawning"

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"Biology, Management, and Protection of North American Sturgeon." In Biology, Management, and Protection of North American Sturgeon, edited by Michael J. Parsley, Paul J. Anders, Allen I. Miller, Lance G. Beckman, and George T. McCabe. American Fisheries Society, 2002. http://dx.doi.org/10.47886/9781888569360.ch5.

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&lt;em&gt;Abstract.&lt;/em&gt;—Recovery or maintenance of sturgeon populations through natural production in perturbed rivers requires adequate knowledge of the abiotic and biotic factors that influence spawning and cause mortality of embryonic, larval, and juvenile life stages. Although it is known that year-class strength of white sturgeon &lt;em&gt;Acipenser transmontanus&lt;/em&gt; is determined within 2–3 months after spawning, little is known about specific causes of mortality to early life stages during this period. Initial spawning success is critical in the development of a strong yea
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"Early Life Stage Mortality Syndrome in Fishes of the Great Lakes and Baltic Sea." In Early Life Stage Mortality Syndrome in Fishes of the Great Lakes and Baltic Sea, edited by Patric Amcoff, Hans Börjeson, Johan Lindeberg, and Leif Norrgren. American Fisheries Society, 1998. http://dx.doi.org/10.47886/9781888569087.ch9.

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&lt;em&gt;Abstract&lt;/em&gt;.—Since 1974, feral Baltic salmon &lt;em&gt;Salmo salar &lt;/em&gt;populations have suffered from yolk sac fry mortality caused by the M74 syndrome. This syndrome affects yolk sac fry originating from specific females, and the mortality in affected family groups is usually 100%. Since 1990–1991, disturbances in the behavior of spawning migrating Baltic salmon have been observed. This study found a strong correlation between wiggling behavior in adult female Baltic salmon and the development of M74 in their offspring. Moreover, the ovarian thiamine concentrations in
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Miller, Charles B. "Reproduction." In Oar Feet and Opal Teeth. Oxford University PressNew York, 2023. http://dx.doi.org/10.1093/oso/9780197637326.003.0011.

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Abstract Female copepods do not spawn massively once then die, like squid or salmon. When mature and mated, they spawn numerous times. Amounts, rates, and longevity of egg production have been observed for many species under varied conditions of temperature and food availability. Two strategies dominate: free release of numerous eggs into the water vs. carrying fewer eggs to hatching of in membrane sacs secreted at the genital opening. Sac spawning provides the protection of the predator escape capacity of the female towing her eggs. Roughly three-times more eggs are required and provided by f
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"Early Life Stage Mortality Syndrome in Fishes of the Great Lakes and Baltic Sea." In Early Life Stage Mortality Syndrome in Fishes of the Great Lakes and Baltic Sea, edited by Annette Pettersson and Åke Lignell. American Fisheries Society, 1998. http://dx.doi.org/10.47886/9781888569087.ch4.

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&lt;em&gt;Abstract&lt;/em&gt;.—The carotenoid levels in Baltic salmon &lt;em&gt;Salmo salar &lt;/em&gt;appear to have decreased as the incidence of the M74 syndrome has increased during the last 20 years. Our preliminary investigations suggested a relationship between a low level of the carotenoid astaxanthin in yolk sac fry of Baltic salmon and elevated mortality attributable to M74. The objective of this study was to further detail this relationship during the spawning seasons of 1994 and 1995 in salmon taken from hatcheries on the Baltic Sea, the Swedish west coast, and Lake Vänern. Total c
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"Early Life Stage Mortality Syndrome in Fishes of the Great Lakes and Baltic Sea." In Early Life Stage Mortality Syndrome in Fishes of the Great Lakes and Baltic Sea, edited by Dale C. Honeyfield, Kofi Fynn-Aikins, John D. Fitzsimons, and Jennifer A. Mota. American Fisheries Society, 1998. http://dx.doi.org/10.47886/9781888569087.ch18.

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&lt;em&gt;Abstract&lt;/em&gt;.—Dietary amprolium, a thiamine antagonist, was fed to lake trout &lt;em&gt;Salvelinus namaycush &lt;/em&gt;broodstock from April to October before spawning to determine its effect on egg and tissue concentrations of thiamine, thiamine monophosphate, and thiamine pyrophosphate. The thiamine concentration of eggs from fish fed no amprolium was 61.8 nmol/g, whereas the concentration of thiamine in fish fed 0.05 and 0.10% amprolium was 4.02 and 1.71 nmol/g (&lt;EM&gt;P &lt;/EM&gt;&lt; 0.01), respectively. In lake trout fed 0.10% amprolium beginning in August, egg free
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"Early Life History of Fishes in the San Francisco Estuary and Watershed." In Early Life History of Fishes in the San Francisco Estuary and Watershed, edited by Randall C. Mager, Serge I. Doroshov, Joel P. Van Eenennaam, and Randall L. Brown. American Fisheries Society, 2004. http://dx.doi.org/10.47886/9781888569599.ch11.

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&lt;em&gt;Abstract.&lt;/em&gt;—Delta smelt &lt;em&gt;Hypomesus transpacificus &lt;/em&gt;juveniles caught in the Sacramento–San Joaquin Delta were reared in the laboratory to full sexual maturity, and embryos were obtained by in vitro fertilization and natural spawning in tanks. Duration of embryo development to hatching was 11–13 d at 14.8–16.0°C, with a development rate similar to other &lt;em&gt;Hypomesus&lt;/em&gt;. Newly hatched larvae were 5.1–5.7 mm total length and resorbed the yolk sac within 6 d and lipid globule within 10 d. Exogenous feeding on rotifers started 5–6 d posthatch. Del
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Kültz, Dietmar. "Anadromous fishes." In A Primer of Ecological Aquaculture. Oxford University PressOxford, 2022. http://dx.doi.org/10.1093/oso/9780198850229.003.0014.

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Abstract Anadromous fishes hatch and develop in freshwater (FW) and migrate to seawater where they spend most of their life before returning to FW for spawning. In contrast to trout, most salmon are anadromous. Atlantic salmon (Salmo salar) dominates aquaculture of anadromous fishes and is produced mainly in its native distribution range. Most Pacific salmon are produced in the Southern hemisphere, outside their native distribution range. Salmon aquaculture consists of a FW hatchery phase and a seawater grow-out phase. These different culture phases are required for all anadromous species. The
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"Paddlefish Management, Propagation, and Conservation in the 21st Century." In Paddlefish Management, Propagation, and Conservation in the 21st Century, edited by CECIL A. JENNINGS and STEVEN J. ZIGLER. American Fisheries Society, 2009. http://dx.doi.org/10.47886/9781934874127.ch1.

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&lt;em&gt;Abstract&lt;/em&gt;.—Paddlefish &lt;em&gt;Polyodon spathula &lt;/em&gt;are among the largest and longest lived of the freshwater fishes (e.g., more than 2.2 m long; 72 kg; 30 years old) and can be distinguished by the presence of a large mouth and a long, paddle-shaped snout. Smooth skin, small eyes, a large, tapering operculum flap, bluish- gray to black coloration dorsally, and a deeply forked heterocercal caudal fin all serve to distinguish paddlefish from other species. Paddlefish become sexually mature and spawn at a later age than many other freshwater fishes; males mature at a
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