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Journal articles on the topic 'Sac-spawning'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

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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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 (2013): 259–64. http://dx.doi.org/10.1093/plankt/fbt117.

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Maslova, Irina V., and Daria A. Rogashevskaya. "New Data on Spawning Site and Group Egg Laying of <i>Onychodactylus fischeri</i> (Boulenger, 1886) (the Southern Sikhote-Alin Range, Russia)." Russian Journal of Herpetology 30, no. 6 (2023): 477–92. http://dx.doi.org/10.30906/1026-2296-2023-30-6-477-492.

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At the end of May, a permanent spawning site of Onychodactylus fischeri was first discovered in the gravel-stony layer under the bottom of a small river valley in the upward flows of subsurface alluvial waters (upper reaches of the Pravaya Sokolovka River, the Sikhote-Alin Range, Chuguevka rayon, Primorsky Krai). This place was located at an altitude of 650 m a.s.l. in mixed coniferous-broad-leaved forest in a narrow river valley. The primary spawning site lay beneath the bottom of a small water body that was two meters away from the main river course. The water in the breeding ground was slig

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Gómez-Gutiérrez, Jaime. "Hatching mechanism and accelerated hatching of the eggs of a sac-spawning euphausiid Nematoscelis difficilis." Journal of Plankton Research 25, no. 11 (2003): 1397–411. http://dx.doi.org/10.1093/plankt/fbg095.

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Alvarez, Paula, Dorleta Garcia, and Unai Cotano. "Investigating the Applicability of Ichthyoplanktonic Indices in Better Understanding the Dynamics of the Northern Stock of the Population of Atlantic Hake Merluccius merluccius (L.)." Fishes 8, no. 1 (2023): 50. http://dx.doi.org/10.3390/fishes8010050.

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Abundance indices are essential data for the application of stock assessment models to obtain fish abundance estimates. Abundance indices have usually been derived from fishery-dependent data, yet the increase in fisheries-independent surveys is now offering new opportunities for these calculations. In this study, we explored the usefulness of ichthyoplankton indices derived from scientific surveys in estimating spawning biomass. In addition, we also investigated whether the strength of the year–class of the commercial cohort of Atlantic hake, as a determinant, could be defined at an early lif

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Gómez-Gutiérrez, J. "HATCHING MECHANISMS AND DEATH OF EUPHAUSIID EMBRYOS DURING HATCHING PROCESS: EVIDENCES FOR EVOLUTIONARY REVERSAL OF THE FREE-LIVING NAUPLIUS." CICIMAR Oceánides 21, no. 1-2 (2006): 63. http://dx.doi.org/10.37543/oceanides.v21i1-2.26.

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This essay attempts to summarize and hypothetically reconstruct the original condition for there productive strategy and hatching mechanisms of the family Euphausiidae (Order Euphausiacea). Comparison is made of the hatching mechanisms and hatching success rates among five broad cast-spawning ( Euphausia pacifica, Euphausia eximia, Euphausia distinguenda, Thysanoes saspinifera, and Thysanoessa inspinata) and two sac-spawning euphausiid species ( Nematoscelis difficilis and Nyctiphanes simplex) collected from the Oregon coast, Bahía Magdalena (west coast of Baja California peninsula), and Gulf

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Gómez-Gutiérrez, J. "HATCHING MECHANISMS AND DEATH OF EUPHAUSIID EMBRYOS DURING HATCHING PROCESS: EVIDENCES FOR EVOLUTIONARY REVERSAL OF THE FREE-LIVING NAUPLIUS." CICIMAR Oceánides 21, no. 1-2 (2006): 63. http://dx.doi.org/10.37543/oceanides.v21i1-2.26.

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This essay attempts to summarize and hypothetically reconstruct the original condition for there productive strategy and hatching mechanisms of the family Euphausiidae (Order Euphausiacea). Comparison is made of the hatching mechanisms and hatching success rates among five broad cast-spawning ( Euphausia pacifica, Euphausia eximia, Euphausia distinguenda, Thysanoes saspinifera, and Thysanoessa inspinata) and two sac-spawning euphausiid species ( Nematoscelis difficilis and Nyctiphanes simplex) collected from the Oregon coast, Bahía Magdalena (west coast of Baja California peninsula), and Gulf

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Futagawa, Masatoshi, Jessica Pizarro, German Bueno, and Juan Pablo Díaz. "Early development of the Peruvian rock seabass Paralabrax humeralis (Teleostei: Serranidae): morphological description of the embryonic and yolk-sac larval stages." Latin American Journal of Aquatic Research 49, no. 3 (2021): 520–25. http://dx.doi.org/10.3856/vol49-issue3-fulltext-2631.

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Describe the embryonic development of Paralabrax humeralis (Peruvian rock seabass) and the present morphology of its eggs and yolk-sac larvae using the eggs spawned by P. humeralis broodstock in captivity. The spawning occurred naturally and spontaneously in early November 2018. The egg is pelagic and round, with a diameter of 0.98 ± 0.02 mm, an oil globule, and a diameter of 0.2 ± 0.02 mm. Embryonic development started with meroblastic cleavage, reaching the first cleavage stage at 0.4 h post-fertilization (HPF), and reached 64 cells at 2.2 HPF. Blastula period, 128 cells to 30% epiboly, end

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NAWANG, SITI UMEY SYAHIRAH MAT, CHING FUI FUI, and SHIGEHARU SENOO. "BIOLOGICAL DEVELOPMENT AND GROWTH OF AMUR CATFISH, Silurus asotus REARED UNDER CONTROLLED TROPICAL CONDITION." Malaysian Applied Biology 49, no. 5 (2020): 11–23. http://dx.doi.org/10.55230/mabjournal.v49i5.1633.

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This study was conducted to investigate the biological development and growth of the Amur catfish, Silurus asotuss at the early larval stage. The eggs and larvae were obtained via the artificial spawning technique. The findings showed that the eggs of the Amur catfish hatched 27 hr after fertilization (hAF) under temperature conditions of 26.9 ± 1.3°C. The newly hatched larvae (4.71 ± 0.87 mm) had a large green yolk sac (0.99 ± 0.02 mm3), unpigmented eyes, undeveloped mouth, and closed anus with one pair of developed maxillary barbels. At the 30 hAH (7.01 ± 0.41 mm), the yolk sac continued to

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Tumpa, Israt Jahan, Md Saddam Hossain, Md Nagim Uddin, and Zakir Hossain. "Spawning and developmental biology of endangered Pabdah catfish, Ompok pabda (Hamilton, 1822)." Asian Journal of Medical and Biological Research 6, no. 3 (2020): 449–59. http://dx.doi.org/10.3329/ajmbr.v6i3.49793.

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Pabdah catfish, Ompokpabdawas collected from the Old Brahmaputra river and successfully induced to breed by injecting pituitary gland extract to evaluate spawning performances and developmental stages under a photo microscope from February 2018 to August 2018. In this study, absolute fecundity of the O. pabdafemales varied from 6,676 to 20,410 eggs per fish. The GSI value of male and female was lower during September and gradually attained its maximum level in June with the highest average value 6.75±0.2 and 1.053±0.2 in female and male, respectively. The average fertilization and hatching rat

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Taylor, David L., and Donald J. Danila. "Predation on winter flounder (Pseudopleuronectes americanus) eggs by the sand shrimp (Crangon septemspinosa)." Canadian Journal of Fisheries and Aquatic Sciences 62, no. 7 (2005): 1611–25. http://dx.doi.org/10.1139/f05-047.

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This study estimated rates of sand shrimp (Crangon septemspinosa) predation on winter flounder (Pseudopleuronectes americanus) eggs and examined the effect of temperature on density-dependent mortality of early-stage flounder. In laboratory experiments, shrimp feeding rates on flounder eggs were positively correlated with temperature and shrimp size. Immunological assays of shrimp stomach contents indicated that 7.2% of shrimp collected from the Niantic River (Connecticut) had flounder eggs in their stomachs. Incidence of egg predation was highest in February (20%) and decreased continuously i

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Domínguez-Petit, Rosario, Patrick Ouellet, and Yvan Lambert. "Reproductive strategy, egg characteristics and embryonic development of Greenland halibut (Reinhardtius hippoglossoides)." ICES Journal of Marine Science 70, no. 2 (2012): 342–51. http://dx.doi.org/10.1093/icesjms/fss180.

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Abstract Domínguez-Petit, R., Ouellet, P., and Lambert, Y. 2013. Reproductive strategy, egg characteristics and embryonic development of Greenland halibut (Reinhardtius hippoglossoides). – ICES Journal of Marine Science, 70: 342–351. Despite the commercial importance of Greenland halibut (GH), important gaps exist in our knowledge of the reproductive and early life stage biology for this species. The present study examined through laboratory experiments the spawning strategy, realized fecundity, egg characteristics, biochemical composition, and embryonic development of GH. The results confirme

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Alonso-Fernández, Alexandre, Alba Ruth Vergara, and Fran Saborido-Rey. "Embryonic development and spawning pattern of Trisopterus luscus (Teleostei: Gadidae) under controlled conditions." Journal of the Marine Biological Association of the United Kingdom 91, no. 6 (2010): 1281–87. http://dx.doi.org/10.1017/s0025315410000147.

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Knowledge on early ontogeny of Trisopterus luscus is scarce and incomplete. This paper describes the first successful attempt ever at achieving the natural spawning in captivity for this species. The reproductive specimens used for this study were obtained in the Ría de Vigo in September 2008 and subsequently transported to the facilities of the Institute of Marine Research (CSIC). The spawning frequency was variable among females, 1.8–4.6 days, but no size-dependent trend was determined. The average batch size, i.e. the number of eggs released per batch, has proven significantly dependent on

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Nguyen, Thi Kim Lien, Thi Thuy Hang Truong, Hoang Lai Lam, Hong Yen Nguyen, and Khanh Duy Ngo. "Induced breeding of Sahyadria denisonii using different hormonal substances." Ministry of Science and Technology, Vietnam 65, no. 9 (2023): 46–50. http://dx.doi.org/10.31276/vjst.65(9).46-50.

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Research on spawning stimulation of Sahyadria denisonii was carried out from June 2022 to October 2022 at the Research and Development Center for High-Tech Agriculture with three inducing agents, HCG, Ovaprim, and LHRHa + Domperidone. Each concentration of a hormone used in the experiment was applied on 5 pairs of brood fish. A 1 ml syringe was used for injecting to the anterior region of the dorsal fin by using a single-injection method and the injection timing of fish was 18 hours. Results showed that Ovaprim had an effect on inducing ovulation and laying eggs at a dose of 0.4-0.5 ml/kg of f

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Bradford, Rodney G., and T. Derrick Iles. "Retention of herring Clupea harengus larvae inside Minas Basin, inner Bay of Fundy." Canadian Journal of Zoology 71, no. 1 (1993): 56–63. http://dx.doi.org/10.1139/z93-009.

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Minas Basin is one of the most tidally active and rapidly flushed macrotidal embayments in the world. But despite this, ichthyoplankton surveys in 1983 and 1984 have shown that herring larvae from spring spawnings inside the basin are retained and metamorphose there about 4 months after hatching. Both yolk-sac and post-yolk-sac larvae with a length range of about 5–20 mm are found in association at individual stations. Published growth rates suggest a residence time for the large larvae of 50–100 days, which agrees with the known lapsed time between first spawning and the time of the surveys o

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Ankit, kumara Md Shadab Alamb *. and Goodly Samalc. "Fish Reproduction Strategies: From Spawn to Fry." Science world a Monthly e magazine 5, no. 4 (2025): 6726–30. https://doi.org/10.5281/zenodo.15268683.

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<strong><em>Abstract</em></strong> Fish employ diverse reproductive strategies to maximize offspring survival in varying environments, ranging from broadcast spawning to viviparity. These strategies including nesting, mouthbrooding, and live-bearing are shaped by ecological pressures, influencing fertilization success, embryonic development, and fry survival. External fertilization predominates in pelagic species, while internal fertilization and parental care enhance offspring protection at the cost of fecundity. Post-hatching stages, such as yolk-sac dependence and exogenous feeding, are cri

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Fried, Stephen M., and Vidar G. Wespestad. "Productivity of Pacific Herring (Clupea harengus pallasi) in the Eastern Bering Sea under Various Patterns of Exploitation." Canadian Journal of Fisheries and Aquatic Sciences 42, S1 (1985): s181—s191. http://dx.doi.org/10.1139/f85-273.

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Pacific herring (Clupea harengus pallasi) is a major food source for western Alaska native people and has been commercially exploited in the eastern Bering Sea since the early 1900's. Commercial harvests were small and localized in coastal waters until foreign factory fleets located and developed a fishery on wintering herring concentrations in the early 1960's. Harvests peaked near 150 000 t in the early 1970's and then declined along with catch per unit effort. Foreign harvests were eliminated following establishment of the United States 200 mile Fishery Conservation Zone. In recent years a

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Trumble, Robert J., and Robert D. Humphreys. "Management of Pacific Herring (Clupea harengus pallasi) in the Eastern Pacific Ocean." Canadian Journal of Fisheries and Aquatic Sciences 42, S1 (1985): s230—s244. http://dx.doi.org/10.1139/f85-277.

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Pacific herring (Clupea harengus pallasi) fishery management in the eastern Pacific Ocean is under jurisdiction of the federal governments of the United States and Canada and the states of Alaska, Washington, Oregon, and California. In Canada, the Department of Fisheries and Oceans is responsible for all Canadian marine fisheries. United States fisheries management is a federal responsibility in waters beyond 5.6 km (3 nautical miles), provided that a Fishery Management Plan is in effect. As no such plan currently exists for herring in the eastern Pacific, individual states manage offshore wat

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Song, Ho-Bok, and Yeong-Mok Son. "Developmental Characteristics of Eggs and Yolk Sac Larvae of Korean Striped Bitterling, Acheilognathus yamatsutae (Cyprinidae), Spawning in Mussels." Korean Journal of Ecology 28, no. 4 (2005): 193–98. http://dx.doi.org/10.5141/jefb.2005.28.4.193.

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Gomez-Gutierrez, J. "Embryonic, early larval development time, hatching mechanism and interbrood period of the sac-spawning euphausiid Nyctiphanes simplex Hansen." Journal of Plankton Research 27, no. 3 (2005): 279–95. http://dx.doi.org/10.1093/plankt/fbi003.

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Semple, GP. "Reproductive behaviour and development of the glassperchlet, Ambassis agrammus Gunther (Pisces: Ambassidae), from the Alligator Rivers system, Northern Territory." Marine and Freshwater Research 36, no. 6 (1985): 797. http://dx.doi.org/10.1071/mf9850797.

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A. agrammus showed sexual dimorphism in body shape during the breeding season. Pairing occurred during daylight with a single release of eggs amongst submerged vegetation at nightfall on the same day. The eggs were demersal, adhesive and spherical (0.50-0.56 mm diameter). A single oil droplet (0.15-0.20 mm diameter) persisted throughout egg and larval development. Hatching occurred 19-23 h after spawning at 27-35�C. At hatching, prolarvae [l .53-1.57 mm in standard length (SL)] were poorly developed and inactive. Feeding commenced 3 days after hatching (at 2.19-2.27 mm SL) after absorption of

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Doan-Nhu, Hai, Tam-Vinh Nguyen, Hoang Do-Huu, Joseph P. Montoya, and Lam Nguyen-Ngoc. "Copepods key traits in diverse habitats of tropical waters." Journal of Plankton Research 44, no. 1 (2022): 158–74. http://dx.doi.org/10.1093/plankt/fbab088.

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Abstract Copepods are the dominant marine zooplankton and perform important functions in the marine food web. However, copepod traits have not been studied in many waters. We studied the copepod community under influence of the Mekong River and the Southern Vietnamese coastal upwelling, based on their functional traits, during the southwest monsoon period in 2016. Fourteen trait categories of four key functional traits (trophic-groups, feeding-types, reproductive-strategies and diel migration) of copepod data were analyzed to investigate how environmental gradients impact on their distribution

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Thornton, Thomas F., and Harvey Kitka. "An Indigenous Model of a Contested Pacific Herring Fishery in Sitka, Alaska." International Journal of Applied Geospatial Research 6, no. 1 (2015): 94–117. http://dx.doi.org/10.4018/ijagr.2015010106.

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This paper uses GIS and spatiotemporal analysis of a historically and culturally modified marine ecosystem to evaluate Pacific herring abundance, declines, vulnerabilities, and future prospects, about which a Native Tribe and state fisheries managers disagree. In 2008, the Sitka Tribe of Alaska (STA) requested that an area within its traditional waters be closed to commercial sac roe fishing to protect spawning Pacific herring (Clupea pallasi), a key species for Native subsistence and marine ecosystem health. This proposal was opposed by the Alaska Department of Fish and Game (ADF&G), whic

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Hüseyin, GÜLTEKİN, and YILMAZ Ebru. "EMBRYONIC AND LARVAL DEVELOPMENT OF THE FIREMOUTH CICHLID (Thorichthys meeki Brind, 1918)." Aquatic Animal Reports 1, no. 2 (2023): 65–81. https://doi.org/10.5281/zenodo.8229232.

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<strong>Abstract</strong> In this study, it was aimed to investigate the embryonic and larval development of firemouth cichlid (<em>Thorichthys meeki </em>Brind, 1918) fish in laboratory environment. The spawning and embryonic development of the eggs of the 5 pairs of broodstock fish used in the study took place at an average water temperature of 27±1°C. Spawning lasted about 60 minutes and the average number of eggs was 1159.40±91.92 pieces.  The long axis of the egg was measured as 1.47±0.01 mm on average, and the short axis as 1.14±0.01 mm on average. Af

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Massicotte, Bernard, and Julian J. Dodson. "Endogenous activity rhythms in tomcod (Microgadus tomcod) post-yolk-sac larvae." Canadian Journal of Zoology 69, no. 4 (1991): 1010–16. http://dx.doi.org/10.1139/z91-146.

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Post-yolk-sac tomcod (Microgadus tomcod) larvae were caught in a spawning river. They were held in the laboratory under three different environmental conditions: (i) constant conditions; (ii) exposure to a simulated tidal cycle; and (iii) exposure to simulated tidal and diel cycles. Swimming activity determinations made under constant conditions revealed significant endogenous rhythms in each group. Chronobiological flexibility affected by simulation of the basic cycles of the estuarine habit was demonstrated. Groups of larvae exposed to simulated tidal signals demonstrated modified rhythmic p

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35

Froneman, Pierre William. "The Effect of Salinity on the Egg Production Rate of the Sac-Spawning Calanoid Copepod, Pseudodiaptomus hessei, in a Temporarily Open/Closed Southern African Estuary." Diversity 15, no. 2 (2023): 263. http://dx.doi.org/10.3390/d15020263.

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Global climate change is anticipated to be associated with changes in the salinity regimes of southern African estuaries as a result of the increased frequency of occurrences of extreme weather events (droughts and coastal storms) and the rise in sea level. The current investigation assessed the impact of salinity on the egg production rate (EPR) of the numerically important sac-spawning calanoid copepod, Pseudodiaptomus hessei, in a temporarily open/closed southern African estuary. The EPR of the copepod was determined using in vitro incubations during three distinct salinity regimes correspo

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36

Chakraborty, BK, and DK Jha. "Embryonic and Larval Development of Thai Pangas Pangasianodon Hypopthalmus (Sauvage, 1878) Under Hatchery Condition." Bangladesh Journal of Zoology 49, no. 1 (2021): 147–59. http://dx.doi.org/10.3329/bjz.v49i1.53690.

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The embryonic and larval development of Pangasianodon hypophthalmus was investigated during peak spawning periods (May-July 2019). The fertilized eggs were adhesive and spherical with a greenish‐brown egg capsule. The yolk sac was yellowish‐brown in color and 1.00–1.70 mm in diameter. The first cleavage stage, embryonic shield, head, tail region, neural grooves and somites were apparent after fourteen hours post‐fertilization. The ranges of incubation period were from 18.00-20.00 hrs at a temperature of 26-30°C. The newly hatched larvae were transparent and light yellowish in color with a body

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Reid, HP, and DA Holdway. "Early development of the Australian crimson-spotted rainbowfish, Melanotaenia fluviatilis (Pisces: Melanotaeniidae)." Marine and Freshwater Research 46, no. 2 (1995): 475. http://dx.doi.org/10.1071/mf9950475.

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This paper describes the early ontogeny of the crimson-spotted rainbowfish Melanotaenia fluviatilis. Eggs ranged in size from 0.98 to 1.07 mm and 35-45 oil droplets were present, as were numerous adhesive filaments which originated from one point. Hatching was predominantly 7-9 days after spawning at 25.5�C. At hatching, larvae (4.2 mm standard length) had a reduced but still present yolk sac and were strong enough swimmers to remain in the upper 1 cm water layer. The swim bladder inflated within 10 h of hatching and the first ingested food was observed after 12 h. At 32 days after hatching, t

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Abdo, Tiago Figueiredo, Paulo Brant Perrotti, Wesley Antunes Meireles, and Nilo Bazzoli. "Initial development of Prochilodus hartii (Pisces: Prochilodontidae) submitted to induced reproduction." Zygote 24, no. 3 (2015): 408–17. http://dx.doi.org/10.1017/s0967199415000337.

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SummaryThe Prochilodontidae prepare for reproduction in captivity, but neither ovulation nor spawning occurs, thus requiring induced reproduction for breeding and restocking. This study analyzed for the first time the embryogenesis and larval ontogeny of P. hartii submitted to induced reproduction by hypophysation with crude common carp pituitary extract. The extrusion of oocytes and sperm was performed manually and fertilization was done using the dry method. After fertilization, the eggs were kept in incubators at 23°C. A stereomicroscope was used to measure egg diameter and to monitor embry

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Fortier, Louis, William C. Leggett, and Serge Gosselin. "Patterns of Larval Emergence and Their Potential Impact on Stock Differentiation in Beach Spawning Capelin (Mallotus villosus)." Canadian Journal of Fisheries and Aquatic Sciences 44, no. 7 (1987): 1326–36. http://dx.doi.org/10.1139/f87-157.

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The environmental cues triggering larval capelin (Mallotus villosus) emergence in the St. Lawrence estuary and in coastal Newfoundland are different. In the estuary, emergence from the intertidal and subtidal spawning grounds starts with dusk and ends with dawn, indicating an active response to low light intensity. In the laboratory, emergence from undisturbed sediments collected in the field is perfectly synchronized with the dark phase of the illumination cycle. Nocturnal emergence would represent an adaptation reducing vulnerability to visual predators. Previous work has shown that in Newfo

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Ward, P., and A. G. Hirst. "Oithona similis in a high latitude ecosystem: abundance, distribution and temperature limitation of fecundity rates in a sac spawning copepod." Marine Biology 151, no. 3 (2006): 1099–110. http://dx.doi.org/10.1007/s00227-006-0548-1.

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Vitomskova, E. A. "DISEASES OF PASSING SALMON FISH DURING ARTIFICIAL REPRODUCTION IN THE CONDITIONS OF THE FAR NORTH OF THE FAR EAST." THEORETICAL & APPLIED PROBLEMS OF AGRO-INDUSTRY 61, no. 3 (2024): 61–64. http://dx.doi.org/10.32935/2221-7312-2024-61-3-61-64.

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Replenishment of fish stocks by increasing the release of juveniles during artificial fish farming is currently an urgent problem in the Far North of the Far East. In 1995-2003; 2021, an epizootological survey of natural spawning grounds and fish farming enterprises located in the northern part of the Okhotsk Sea basin was conducted: Ola, Arman, Taui, Yana, Iret, Ola experimental production acclimatization base, Armansky, Taui, Yansky salmon hatcheries. The aim is to study bacterial and protozoal diseases of passing salmonids in artificial fish farming. The novelty of the research is that for

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Eshaghzadeh, Hamid, Carles Alcaraz, Arash Akbarzadeh, and Enric Gisbert. "The combination of bivariate and multivariate methods to analyze character synchronization and early allometric growth patterns in the stellate sturgeon (Acipenser stellatus) as tools for better understanding larval behavior." Canadian Journal of Fisheries and Aquatic Sciences 74, no. 10 (2017): 1528–37. http://dx.doi.org/10.1139/cjfas-2016-0288.

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Multivariate allometry patterns and length at metamorphosis (Lm) were determined in Acipenser stellatus by means of principal component analysis from 12 morphometric characters. The multivariate analysis differentiated three growth stanzas: the prelarval, larval, and early juvenile stages. The prelarval stage comprised the period from hatching (9.7 mm in total length, TL) to the transition to exogenous feeding (17.7 mm TL, Lm1), a period characterized by yolk sac depletion and fast growth of the anterior and posterior body regions. These changes coincided with the development of sensory, feedi

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Semple, GP. "Reproductive behaviour and early development of the honey blue-eye, Pseudomugil mellis Allen and Ivantsoff 1982 (Pisces : Pseudomugilidae), from the North-east Coast Divison, south-eastern Queensland, Australia." Marine and Freshwater Research 42, no. 3 (1991): 277. http://dx.doi.org/10.1071/mf9910277.

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Specimens of Pseudomugil mellis larger than 15 mm standard length (SL) showed sexual dichromatism as well as dimorphism in fin and body shape. Pairing occurred diurnally, with multiple releases of eggs amongst submerged vegetation between late morning and early afternoon when increasing water temperature reached 28� C. Eggs were demersal, adhesive and spherical (1.29-1.64 mm diameter) and had adhesive fibres (0.5-2.0 mm long) distributed (0.2-0.3 mm apart) over the chorion. Oil droplets (0.01-0.35 mm diameter) persisted throughout egg and larval development. Eggs hatched 112-190 h after spawni

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Haputhantri, S. S. K., K. H. K. Bandaranayake, M. I. G. Rathnasuriya, et al. "Reproductive Biology and Feeding Ecology of The Blue Swimming Crab (Portunus pelagicus) in Northern Coastal Waters, Sri Lanka." Tropical Life Sciences Research 33, no. 2 (2022): 155–78. http://dx.doi.org/10.21315/tlsr2022.33.2.8.

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Blue swimming crab (Portunus pelagicus) fishery has emerged to become an important export-oriented fishery in Sri Lanka over a decade and recently resulted in a rapid increase in the exploitation. The present study attempts to understand the reproductive biology and feeding ecology of blue swimming crab which will be vital in the management of capture fishery. Five major landing sites in the Jaffna district in Northern Sri Lanka, where blue swimming crab is frequently landed throughout the year were selected for the study. Biological parameters relating to sex, carapace width, body weight, mat

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Pironet, Françoise N., and Francisco J. Neira. "Hormone-induced spawning and development of artificially reared larvae of the West Australian dhufish, Glaucosoma hebraicum (Glaucosomatidae)." Marine and Freshwater Research 49, no. 2 (1998): 133. http://dx.doi.org/10.1071/mf97250.

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Hormone-induced spawning of the West Australian dhufish, Glaucosoma hebraicum (Glaucosomatidae) is reported, and the artificially-reared eggs and larvae are described. Hormones tested were hCG, Ovaprim and LHRH analogue, the last both as implants and in a saline solution. Late-stage fertilized eggs are spherical (960–1200 µm), possess a pigmented oil globule (210–273 µm) anteriorly on the unsegmented yolk, and hatch in about 32 hours at ~23˚C. Newly hatched larvae (1.75–2.10 mm) have a prominent yolk sac which is resorbed after 3.3 days. The mouth becomes functional from Day 3, first feeding o

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46

Heath, M. R., and P. MacLachlan. "Dispersion and mortality of yolk-sac herring (Clupea harengus L.) larvae from a spawning ground to the west of the Outer Hebrides." Journal of Plankton Research 9, no. 4 (1987): 613–30. http://dx.doi.org/10.1093/plankt/9.4.613.

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47

Gómez-Gutiérrez, Jaime, Carmen Rodríguez-Jaramillo, Jorge Del Ángel-Rodríguez, et al. "Biology of the subtropical sac-spawning euphausiid Nyctiphanes simplex in the northwestern seas of Mexico: Interbrood period, gonad development, and lipid content." Deep Sea Research Part II: Topical Studies in Oceanography 57, no. 7-8 (2010): 616–30. http://dx.doi.org/10.1016/j.dsr2.2009.10.011.

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48

Glenn, Richard A., Peter W. Taylor, Eric H. Pelton, et al. "Genetic Evidence of Vertical Transmission and Cycling of Yersinia ruckeri in Hatchery-Origin Fall Chinook Salmon Oncorhynchus tshawytscha." Journal of Fish and Wildlife Management 6, no. 1 (2014): 44–54. http://dx.doi.org/10.3996/012014-jfwm-010.

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Abstract Enteric redmouth disease, caused by the bacterium Yersinia ruckeri, can be a severe problem in the culture of salmonid fishes, and can persist as a chronic infection within hatchery facilities for an indefinite amount of time ranging from months to years. Using a nested polymerase chain reaction (nPCR) assay and a real-time quantitative PCR (qPCR) assay, the prevalence of Y. ruckeri deoxyribonucleic acid (DNA) was documented across a single production cycle of fall Chinook salmon Oncorhynchus tshawytscha reared at a hatchery. Ovarian fluid from spawning female adults, unfertilized egg

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Baiandina, Iu S., and A. N. Khanaychenko. "Water turbulence effect on egg survival and characteristics of hatched larvae of the Black Sea turbot Scophthalmus maeoticus (Pallas, 1814)." Marine Biological Journal 3, no. 4 (2018): 101–5. http://dx.doi.org/10.21072/mbj.2018.03.4.11.

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The impact of different level of turbulence on developing eggs and prelarvae of the Black Sea turbot Scophthalmus maeoticus obtained from the pair of wild spawners at the end of natural spawning season has been studied. The incubation was carried out at three different levels of turbulence generated by diffused aeration: without aeration (calm water), low aeration (34 ml per minute) and high aeration (75 ml per minute). In calm water hatching rate (HR) of turbot eggs was 20 % and the hatched prelarvae had the longest standard length (SL = 3.13 mm) and the biggest volume of the yolk sac (VYS =

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Marčić, Zoran, Ana Jerković, Marko Ćaleta, et al. "Early Development of the Endemic Delminichthys krbavensis (Leuciscidae, Cypriniformes) from a Karstic Field in Croatia." Diversity 14, no. 5 (2022): 393. http://dx.doi.org/10.3390/d14050393.

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This is the first report of the early development for the endemic Krbava minnow Delminichthys krbavensis from a karstic field in Croatia, and the first report of any species of the genus Delminichthys. The description is based on basic morphometric measures and meristic counts during a 48-day observation of embryos and larvae acquired from successful spawning and rearing in an aquarium. The mean total length of larvae at the time of hatching was 3.12 mm. Mouth opening and independent feeding and intestinal function were observed after day 11 post-hatching (PH) at which time the yolk sac was co

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