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Journal articles on the topic 'Spawning strategy'

Author: Grafiati

Published: 24 June 2021

Last updated: 29 July 2025

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1

van der Meulen, Dylan E., Chris T. Walsh, Matthew D. Taylor, and Charles A. Gray. "Habitat requirements and spawning strategy of an estuarine-dependent fish, Percalates colonorum." Marine and Freshwater Research 65, no. 3 (2014): 218. http://dx.doi.org/10.1071/mf13060.

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Determining the links among estuarine hydrography, habitat and spawning of estuarine-dependent fish is essential for understanding reproductive dynamics, recruitment processes and directing conservation efforts. Acoustic tracking was used to evaluate fine-scale spatial and temporal patterns in spawning activity of Percalates colonorum (estuary perch) within the Shoalhaven River, south-eastern Australia. Plankton tows were used to determine the timing of spawning events. Tagged P. colonorum exhibited movements restricted to areas of structurally complex large wooden debris and a concrete ferry

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2

Overholtz, William J. "Harvesting Strategies and Fishing Mortality Reference Point Comparisons for the Northwest Atlantic Stock of Atlantic Mackerel (Scomber scombrus)." Canadian Journal of Fisheries and Aquatic Sciences 50, no. 8 (1993): 1749–56. http://dx.doi.org/10.1139/f93-196.

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Previous research indicated that density dependence in population-level responses such as growth and predation mortality rate may play a major role in regulating the dynamics of the Northwest Atlantic stock of Atlantic mackerel (Scomber scombrus). Simulation studies, utilizing this compensatory model of the mackerel stock, suggest that expected yields and spawning stock sizes under conditions of constant harvest rate or constant catch would be quite disparate. Yields and spawning stock size would be less variable and slightly larger under a constant catch strategy for catches of mackerel up to

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3

MacCall, Alec D., Tessa B. Francis, André E. Punt, et al. "A heuristic model of socially learned migration behaviour exhibits distinctive spatial and reproductive dynamics." ICES Journal of Marine Science 76, no. 2 (2018): 598–608. http://dx.doi.org/10.1093/icesjms/fsy091.

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Abstract We explore a “Go With the Older Fish” (GWOF) mechanism of learned migration behaviour for exploited fish populations, where recruits learn a viable migration path by randomly joining a school of older fish. We develop a non-age-structured biomass model of spatially independent spawning sites with local density dependence, based on Pacific herring (Clupea pallasii). We compare a diffusion (DIFF) strategy, where recruits adopt spawning sites near their natal site without regard to older fish, with GWOF, where recruits adopt the same spawning sites, but in proportion to the abundance of

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Kurobe, Tomofumi, Bruce G. Hammock, Lauren J. Damon, et al. "Reproductive strategy of Delta Smelt Hypomesus transpacificus and impacts of drought on reproductive performance." PLOS ONE 17, no. 3 (2022): e0264731. http://dx.doi.org/10.1371/journal.pone.0264731.

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Understanding reproductive biology and performance of fish is essential to formulate effective conservation and management programs. Here, we studied reproductive strategies of female Delta Smelt Hypomesus transpacificus, an endangered fish species in the State of California, the United States, focusing on (1) better understanding their distribution pattern during the winter and spring spawning season at very fine scale to predict their possible spawning grounds and (2) assessing impacts of a recent, severe drought on their reproductive performance. We formulated our hypotheses as follows; (1)

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Melvin, Gary D., Robert L. Stephenson, and Michael J. Power. "Oscillating reproductive strategies of herring in the western Atlantic in response to changing environmental conditions." ICES Journal of Marine Science 66, no. 8 (2009): 1784–92. http://dx.doi.org/10.1093/icesjms/fsp173.

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Abstract Melvin, G. D., Stephenson, R. L., and Power, M. J. 2009. Oscillating reproductive strategies of herring in the western Atlantic in response to changing environmental conditions. – ICES Journal of Marine Science, 66: 1784–1792. Herring are broadly distributed in the western Atlantic, but reproductive activity is restricted to the central portion, from Cape Cod to northern Newfoundland. Spawning extends from early spring to late autumn. Two spawning types are recognized: spring spawners and autumn spawners. At the southern extreme, spawning occurs almost exclusively in autumn, whereas i

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Albers, J. L., and M. L. Wildhaber. "Reproductive strategy, spawning induction, spawning temperatures and early life history of captive sicklefin chubMacrhybopsis meeki." Journal of Fish Biology 91, no. 1 (2017): 58–79. http://dx.doi.org/10.1111/jfb.13329.

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Rifi, Mouna, Gaël Le Pennec, Mohamed Ben Salem, and Jamila Ben Souissi. "Reproductive strategy of the invasive cockle Fulvia fragilis in the Bay of Tunis (Tunisia)." Journal of the Marine Biological Association of the United Kingdom 91, no. 7 (2011): 1465–75. http://dx.doi.org/10.1017/s0025315411000099.

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This study is the first work on the reproductive biology of lessepsian bivalve Fulvia fragilis. Monthly and bimonthly samplings were made in the period from April 2006 to October 2007, at the Bay of Tunis (northern Tunisia). From histological preparations of gonad, a gametogenic scale was drawn up based on eight stages: sexual rest; initiation of gametogenesis; advanced gametogenesis; ripe; partial spawning; advanced spawning; restoration; and spent. After examination of gonad preparations, F. fragilis appeared to be a simultaneous hermaphrodite species. Spawning was continuous all along the y

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Priyatha, Chokki Veettil, and Kumari Chidambaran Chitra. "Evaluation of the reproductive cycle and gonadal development in the climbing perch, Anabas testudineus (Bloch, 1792) in captivity." Journal of Fisheries 10, no. 1 (2022): 101206. http://dx.doi.org/10.17017/j.fish.364.

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The climbing perch Anabas testudineus, the most demanded indigenous fish species of India, were used for the evaluation of reproductive strategy and gonadal development at first maturation under the controlled laboratory condition. In both sexes, four distinct gonadal developmental stages namely preparatory, pre-spawning, spawning, and post-spawning were identified based on the gonadosomatic index (GSI), hepatosomatic index (HSI), gonadal morphology, and the levels of serum sex hormones. The spawning stage was identified from July and August and the fecundity ranged from 6500–11000 eggs. The G

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9

Embke, Holly S., Patrick M. Kocovsky, Tatiana Garcia, Christine M. Mayer, and Song S. Qian. "Modeling framework to estimate spawning and hatching locations of pelagically spawned eggs." Canadian Journal of Fisheries and Aquatic Sciences 76, no. 4 (2019): 597–607. http://dx.doi.org/10.1139/cjfas-2018-0047.

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Identifying spawning and hatching locations is vital to controlling invasive fish and conserving imperiled fish, which can be difficult for pelagically spawning species with semi-buoyant eggs. In freshwater systems, this reproductive strategy is common among cyprinid species, such as Chinese carp species currently threatening the Great Lakes. Following the confirmation that one of these species, grass carp (Ctenopharyngodon idella), was spawning in a Great Lakes tributary, we developed a modeling framework to combine field data with hydraulic models to calculate the most probable spawning and

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Hall, D. L., R. Hilborn, M. Stocker, and C. J. Walters. "Alternative Harvest Strategies for Pacific Herring (Clupea harengus pallasi)." Canadian Journal of Fisheries and Aquatic Sciences 45, no. 5 (1988): 888–97. http://dx.doi.org/10.1139/f88-107.

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A simulated Pacific herring (Clupea harengus pallasi) population is used to evaluate alternative management strategies of constant escapement versus constant harvest rate for a roe herring fishery. The biological parameters of the model are derived from data on the Strait of Georgia herring stock. The management strategies are evaluated using three criteria: average catch, catch variance, and risk. The constant escapement strategy provides highest average catches, but at the expense of increased catch variance. The harvest rate strategy is favored for its reduced variance in catch and only a s

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11

Skaret, Georg, and Aril Slotte. "Herring submesoscale dynamics through a major spawning wave: duration, abundance fluctuation, distribution, and schooling." ICES Journal of Marine Science 74, no. 3 (2016): 717–27. http://dx.doi.org/10.1093/icesjms/fsw180.

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In this study, a series of 17 repeated acoustic trawl surveys within a ca. 1500 km2 area covering the major spawning location for Norwegian spring-spawning herring (Clupea harengus) was conducted over a period of about 1 month. Local herring abundance increased from ca. 25 000 to 237 000 t, a significant proportion of the total spawning stock, in just 3 d and subsequently decreased to &lt;30 000 t over the next 7 d. The abundance change was due to a single major spawning wave developing over the observation period, and an estimated 46 000 t of eggs and milt were deposited during the short

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Araújo, Francisco G., Aparecida A. Nascimento, Iracema D. Gomes, Armando Sales, and Beatriz A. Chagas de Oliveira. "Gonadal development and reproductive period of the characin Astyanax aff. bimaculatus (Characiformes: Characidae) in a tropical reservoir in southeastern Brazil." Zoologia 36 (October 30, 2019): 1–14. http://dx.doi.org/10.3897/zoologia.36.e30610.

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The gonadal development of the characin Astyanax aff. bimaculatus from Funil Reservoir, an impoundment in the middle reaches of the Paraiba do Sul River in southeastern Brazil was analysed through histological, histochemical and histometric techniques, and the spawning season was determined. Unbalanced sex ratio was found, with females outnumbering and reaching larger sizes than males. The following stages of oogenic cell development were identified for females: primary growth, pre-vitellogenic (cortical alveolar) and vitellogenic. In males, the following stages were determined: spermatogonia

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Araújo, Francisco G., Aparecida A. Nascimento, Iracema D. Gomes, Armando Sales, and Oliveira Beatriz A. Chagas de. "Gonadal development and reproductive period of the characin Astyanax aff. bimaculatus (Characiformes: Characidae) in a tropical reservoir in southeastern Brazil." Zoologia 36 (October 30, 2019): 1–14. https://doi.org/10.3897/zoologia.36.e30610.

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The gonadal development of the characin Astyanax aff. bimaculatus from Funil Reservoir, an impoundment in the middle reaches of the Paraiba do Sul River in southeastern Brazil was analysed through histological, histochemical and histometric techniques, and the spawning season was determined. Unbalanced sex ratio was found, with females outnumbering and reaching larger sizes than males. The following stages of oogenic cell development were identified for females: primary growth, pre-vitellogenic (cortical alveolar) and vitellogenic. In males, the following stages were determined: spermatogonia

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14

Setyono, Dwi E. D. "REPRODUCTIVE ASPECTS OF THE TROPICAL ABALONE, HALIOTIS ASININA, FROM SOUTHERN LOMBOK WATERS, INDONESIA." Marine Research in Indonesia 30 (May 11, 2018): 1–14. http://dx.doi.org/10.14203/mri.v30i0.420.

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The main objective of this study was to determine reproductive strategy including major spawning season of tropical abalone (Haliotis asinina) from southern Lombok waters, Indonesia. Gonad bulk index, maturity stages and oocyte size frequency distribution were applied to document gonadal development and major spawning season. The results of this study show that H. asinina in southern Lombok waters displayed year-round spawning with a high proportion occurring in August - November, when gonad index dropped to a lower level and high proportion of partly spawned and/or spent ovaries occurred in t

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15

Gutmann Roberts, Catherine, and J. Robert Britton. "Spawning strategies in cypriniform fishes in a lowland river invaded by non-indigenous European barbel Barbus barbus." Hydrobiologia 847, no. 19 (2020): 4031–47. http://dx.doi.org/10.1007/s10750-020-04394-9.

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Abstract Spawning strategies of lowland river fishes include single spawning, where reproduction generally occurs in early spring to provide 0+ fish with an extended growth season through the summer, but with a high risk of stochastic mortality events occurring, such as early summer floods. This risk can be reduced by multiple or protracted spawning strategies, where 0+ fish are produced over an extended period, often into mid-summer, but with the trade-off being a shorter growth season. The spawning strategies of cypriniform fish were explored in the River Teme, a spate river in Western Engla

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16

Waddy, S. L., and D. E. Aiken. "Intermolt Insemination, an Alternative Mating Strategy for the American Lobster (Homarus americanus)." Canadian Journal of Fisheries and Aquatic Sciences 47, no. 12 (1990): 2402–6. http://dx.doi.org/10.1139/f90-267.

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American lobster (Homarus americanus) have a dual mating strategy. Although most females mate when they are newly molted, mating can occur at any molt stage if necessary, in the laboratory, virtually all uninseminated preovigerous females mate prior to spawning. Male aggression is a major factor in the success of intermolt mating and males can discriminate between immature and mature females, and between inseminated and uninseminated females. Female receptivity is affected by both ovarian stage and the presence of stored sperm, but not by molt stage. Most females become unreceptive after insem

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17

Rodrigues, Karina A., Gustavo J. Macchi, Agueda Massa, and María I. Militelli. "Seasonal analysis of condition, biochemical and bioenergetic indices of females of Brazilian flathead, Percophis brasiliensis." Neotropical Ichthyology 11, no. 1 (2013): 153–62. http://dx.doi.org/10.1590/s1679-62252013000100018.

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Percophis brasiliensis is a demersal species that constitutes an important resource of Argentine coastal fisheries. Nevertheless, information about bioenergetic dynamic of reproduction has not been reported. Therefore, seasonal variations of condition factors, biochemical composition and energy density of different tissues were analyzed in order to determine the strategy of energy allocation during the reproductive cycle of this species. Condition indices (hepatosomatic and K) showed a seasonal pattern opposite to that observed for gonadosomatic index, which was characterized by higher values

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GRAU, A., F. SABORIDO-REY, E. PASTOR, et al. "Reproductive strategy of common dentex Dentex dentex: management implications." Mediterranean Marine Science 17, no. 2 (2016): 552. http://dx.doi.org/10.12681/mms.1156.

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Common dentex Dentex dentex is an iconic endangered species in the Mediterranean where is a sought after target species for small-scale, recreational and spearfishing fisheries. The reproductive biology of D. dentex in the natural environment is poorly known; therefore the reproductive strategy of the species was assessed by combining reproductive traits with the growth characteristics (estimated from length-at-age data), the size/age of sexual maturity and the energetic dynamics. A total of 358 wild fish were sampled on Mallorca Island (W Mediterranean) from March 1996 to June 1999 with a 19

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Zheng, J., M. C. Murphy, and G. H. Kruse. "Analysis of harvest strategies for red king crab, Paralithodes camtschaticus, in Bristol Bay, Alaska." Canadian Journal of Fisheries and Aquatic Sciences 54, no. 5 (1997): 1121–34. http://dx.doi.org/10.1139/f97-003.

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A modifiable harvest rate constrained by a minimum spawning abundance (threshold) is currently used to set the annual harvest level for Bristol Bay red king crab, Paralithodes camtschaticus. A length-based simulation model was constructed to evaluate effects of recruitment, natural mortality, and handling mortality on this harvest strategy. Evaluation criteria included mean yield, stability of yield, harvest opportunity, and stability of spawning stock. Optimal mature male harvest rates were strongly negatively related to handling mortality. For any given harvest rate, handling mortality is a

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Machaieie, Sidonio, and Isabel M. Silva. "Spawning aggregations of fish in Cabo Delgado, Northern Mozambique: An interview-based survey of artisanal fishers." Western Indian Ocean Journal of Marine Science 19, no. 1 (2020): 33–43. http://dx.doi.org/10.4314/wiojms.v19i1.3.

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Seasonal aggregations at specific sites are common among some fish species. Experienced fishermen know where and when these aggregations happen, often targeting these spawning sites to increase their catch. This strategy can further contribute to endangering the survival of these species, especially for those already threatened by other forms of pressure. This study contributes knowledge to the spawning aggregation of fish in the north of Mozambique following survey work conducted around Cabo Delgado Province in six coastal villages in 2016, 2017 and 2018. The objectives of the study were 1) t

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Stewart, John, Anne-Marie Hegarty, Caitlin Young, and Ashley M. Fowler. "Sex-specific differences in growth, mortality and migration support population resilience in the heavily exploited migratory marine teleost Mugil cephalus (Linnaeus 1758)." Marine and Freshwater Research 69, no. 3 (2018): 385. http://dx.doi.org/10.1071/mf17135.

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Understanding mechanisms supporting the resilience of exploited fish populations is fundamental to sustainable management. Herein we identify sex-specific differences in life history traits that confer resilience in the heavily exploited population of Mugil cephalus along eastern Australia. M. cephalus in this region emigrate from estuaries and undergo an annual northerly spawning migration that is dominated by males. Males mature, on average, at younger ages than females and were most abundant in the spawning migration at age-4, whereas females were most abundant at age-5. Females grew signif

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van Damme, Cindy J. G., Anders Thorsen, Merete Fonn, et al. "Fecundity regulation in horse mackerel." ICES Journal of Marine Science 71, no. 3 (2013): 546–58. http://dx.doi.org/10.1093/icesjms/fst156.

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Abstract Egg production methods have been used successfully in the provision of advice for fisheries management. These methods need accurate and unbiased estimates of fecundity. We explore the reproductive strategy of horse mackerel and estimation of fecundity. Fecundity and fecundity regulation in relation to condition was investigated over a number of years. Fulton's K, lipid content, and hepatosomatic index increased after the start of spawning, though decreased again at the end of spawning. The increase in the gonadosomatic index, fecundity, and body condition after the onset of spawning s

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Penton, Paulette M., Craig T. McFarlane, Erin K. Spice, Margaret F. Docker, and Gail K. Davoren. "Lack of genetic divergence in capelin (Mallotus villosus) spawning at beach versus subtidal habitats in coastal embayments of Newfoundland." Canadian Journal of Zoology 92, no. 5 (2014): 377–82. http://dx.doi.org/10.1139/cjz-2013-0261.

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Capelin (Mallotus villosus (Müller, 1776)), a focal forage fish in the north Atlantic, spawn on both beach and demersal (deep-water) sites throughout their circumpolar distribution. Although these habitats rarely occur in close proximity, demersal spawning sites within 4 km of beach spawning sites (subtidal) have recently been discovered in two coastal embayments in Newfoundland, Canada. The physical environment differs considerably between beach and subtidal spawning sites, creating the potential for local adaptation and genetic divergence of capelin from the two habitats, but this has never

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Kaemingk, Mark A., Kristopher J. Stahr, Jeffrey C. Jolley, Richard S. Holland, and David W. Willis. "Evidence for bluegill spawning plasticity obtained by disentangling complex factors related to recruitment." Canadian Journal of Fisheries and Aquatic Sciences 71, no. 1 (2014): 93–105. http://dx.doi.org/10.1139/cjfas-2013-0282.

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Fishes can exhibit many forms of plasticity to maximize fitness. However, limited information exists on the ability of freshwater fish to adjust spawning behavior and characteristics (e.g., timing, duration, magnitude of spawning events) to minimize mortality of recruits and ultimately maximize fitness. We wanted to test the life history hypothesis for bluegill (Lepomis macrochirus) (i.e., opportunistic strategy) utilizing existing literature and results from our study to further evaluate the potential for spawning plasticity in this species. Our objective was to identify bluegill recruitment

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Sinaga, Sunarti, Hsueh-Jung Lu, and Jia-Rong Lin. "Mackerel (Scomber australasicus) Reproduction in Northeastern Taiwan." Journal of Marine Science and Engineering 9, no. 12 (2021): 1341. http://dx.doi.org/10.3390/jmse9121341.

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Blue mackerel (Scomber australasicus) is a crucial target species for coastal fisheries in Taiwan, and additionally it has maintained its status as the highest-produced species. The timely measurement of spawning status is crucial for determining the correct management strategy for this species. The objective of this study was to determine size at maturity, fecundity, batch fecundity, and spawning frequency on the basis of samples collected from Nan-Fang-Ao fishing port in Yilan, during the spawning season from 2017 to 2019. Histological sections indicated that the blue mackerel were multiple

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Hidayat, Thomas, Endah Febrianti, and Yoke Hani Restiangsih. "POLA DAN MUSIM PEMIJAHAN IKAN TONGKOL KOMO (Euthynnus affinis Cantor, 1850) DI LAUT JAWA." BAWAL Widya Riset Perikanan Tangkap 8, no. 2 (2017): 101. http://dx.doi.org/10.15578/bawal.8.2.2016.101-108.

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Ikan tongkol komo (Euthynnus affinis, Cantor 1850) merupakan salah satu jenis kelompok ikan pelagis besar yang banyak didaratkan oleh armada jarring insang dan pukat cincin di Tegal. Tersedianya data dan informasi tentang pola dan musim pemijahan merupakan bagian dari pengetahuan yang diperlukan untuk mengetahui status sumberdaya bagi upaya pengelolaanya. Penelitian ini ditujukan untuk mendapatkan pola dan musim pemijahan ikan tongkol komo di Laut Jawa khususnya di pantai Tegal dan sekitarnya. Penelitian dilakukan pada bulan Februari-Desember 2012 di tempat pendaratan ikan kota Tegal, Jawa Ten

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Newton, GM. "Estuarine Ichthyoplankton Ecology in Relation to Hydrology and Zooplankton Dynamics in salt-wedge Estuary." Marine and Freshwater Research 47, no. 2 (1996): 99. http://dx.doi.org/10.1071/mf9960099.

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The ichthyoplankton assemblage of the Hopkins River estuary, Victoria, was dominated by estuarine taxa that included demersal (goby, gudgeon) and pelagic (black bream, estuary perch, anchovy) species. The two seasonal peaks in fish larvae abundance were related to (1) the spring/summer zooplankton increase that occurred after flooding of the estuary and was comprised predominantly of copepod nauplii, thereby providing a good prey field for very young fish larvae, and (2) the autumn zooplankton maxima, which would provide a wide selection of copepod stages and meroplankton and promote dietary p

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Folkvord, Arild, Christian Jørgensen, Knut Korsbrekke, Richard D. M. Nash, Trygve Nilsen, and Jon Egil Skjæraasen. "Trade-offs between growth and reproduction in wild Atlantic cod." Canadian Journal of Fisheries and Aquatic Sciences 71, no. 7 (2014): 1106–12. http://dx.doi.org/10.1139/cjfas-2013-0600.

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Animals partition and trade off their resources between competing needs such as growth, maintenance, and reproduction. Over a lifetime, allocation strategies should result in distinct trajectories for growth, survival, and reproduction, but such longitudinal individual data are difficult to reconstruct for wild animals and especially marine fish. We were able to reconstruct two of these trajectories in wild-caught Northeast Arctic cod (Gadus morhua) females: size-at-age was back-calculated from otolith growth increments, and recent spawning history was reconstructed from postovulatory follicle

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Li, Yang, James R. Bence, and Travis O. Brenden. "Can spawning origin information of catch or a recruitment penalty improve assessment and fishery management performance for a spatially structured stock assessment model?" Canadian Journal of Fisheries and Aquatic Sciences 75, no. 12 (2018): 2136–48. http://dx.doi.org/10.1139/cjfas-2017-0523.

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We used simulations based on lake whitefish (Coregonus clupeaformis) populations to explore the benefits of using spawning origin information for parsing catch to spawning populations in stock assessments for intermixed fisheries exhibiting an overlapping movement strategy. We compared this origin-informed assessment model with a standard assessment model that did not parse catch. We additionally evaluated the influence of including annual recruitment penalties. For standard assessment models, spawning stock biomass estimates could be unstable and biased (sometimes by more than 50%), depending

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Rodrigues, Marcelo, Manuel E. Garcí, Jesús S. Troncoso, and Ángel Guerra. "Spawning strategy in Atlantic bobtail squid Sepiola atlantica (Cephalopoda: Sepiolidae)." Helgoland Marine Research 65, no. 1 (2010): 43–49. http://dx.doi.org/10.1007/s10152-010-0199-y.

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Choi, Jong-Yun, and Seong-Ki Kim. "An Evolutionary Strategy for Spawning Habitat Selection by Pseudopungtungia tenuicorpa." Animals 13, no. 13 (2023): 2170. http://dx.doi.org/10.3390/ani13132170.

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In this study, we hypothesized that the limited geographical distribution of Pseudopungtungia tenuicorpa in South Korea is closely related to the local abundance of their preferred spawning habitats. Eggs of P. tenuicorpa were most frequently observed in cracks smaller than 5 cm, followed by the nests of other fish, such as Coreoperca herzi. Although eggs of P. tenuicorpa were also found in cracks larger than 6 cm, most of them were consumed or damaged by other fish. However, the number of P. tenuicorpa eggs spawned in cracks smaller than 5 cm remained similar to the number of eggs at the time

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Jiang, Lei, Xin-Ming Lei, Sheng Liu, and Hui Huang. "Fused embryos and pre-metamorphic conjoined larvae in a broadcast spawning reef coral." F1000Research 4 (February 13, 2015): 44. http://dx.doi.org/10.12688/f1000research.6136.1.

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Fusion of embryos or larvae prior to metamorphosis is rarely known to date in colonial marine organisms. Here, we observed for the first time the embryos of the broadcast spawning coral Platygyra daedalea could fuse during blastulation and further develop into conjoined larvae, and the settlement of conjoined larvae immediately resulted in inborn juvenile colonies. Considering the frequent record of synchronous spawning events and spawn slicks in the field, fusion of embryos might be a naturally occurring phenomenon, and act as an adaptive strategy to form pre-metamorphic united larvae and lar

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Williams, Alan, Deborah Osterhage, Franziska Althaus, Timothy Ryan, Mark Green, and John Pogonoski. "A Very Large Spawning Aggregation of a Deep-Sea Eel: Magnitude and Status." Journal of Marine Science and Engineering 9, no. 7 (2021): 723. http://dx.doi.org/10.3390/jmse9070723.

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Multiple lines of evidence substantiate the existence of a very large aggregation of the basketwork eel, Diastobranchus capensis, on the small (3 km2) Patience Seamount off southeast Australia. The aggregation appears to be present year-round, but largest in the austral autumn when composed of spawning eels. Twenty eels caught in April 2015 (14 female, 6 male) were all in advanced stages of spawning condition. The eel’s abundance in the aggregation was very high as measured at seamount, local and regional scales. Hydroacoustic measurement of the spawning aggregation’s dimensions (~100 × 1000 m

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Berejikian, Barry A., Thom Johnson, Richard S. Endicott, and Joy Lee-Waltermire. "Increases in steelhead (Oncorhynchus mykiss) redd abundance resulting from two conservation hatchery strategies in the Hamma Hamma River, Washington." Canadian Journal of Fisheries and Aquatic Sciences 65, no. 4 (2008): 754–64. http://dx.doi.org/10.1139/f08-014.

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Conservation hatcheries for anadromous salmonids that aim to increase production and minimizing genetic, ecological, and demographic risks have not been experimentally tested for their ability to increase number of adults spawning in the natural environment. The conservation hatchery program for steelhead (i.e., sea-run rainbow trout, Oncorhynchus mykiss) evaluated in this study caused an increase in the number of redds in the supplemented Hamma Hamma River compared with the presupplementation period. Three control populations (nonsupplemented) either remained stable or declined over the same

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Kuipers, Matthew R., Gretta T. Pecl, and Natalie A. Moltschaniwskyj. "Batch or trickle: understanding the multiple spawning strategy of southern calamary, Sepioteuthis australis (Mollusca : Cephalopoda)." Marine and Freshwater Research 59, no. 11 (2008): 987. http://dx.doi.org/10.1071/mf07200.

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Many cephalopods are ‘multiple spawners’; however, we know little about the timing and dynamics of egg production. This has implications for the allocation of energy to reproduction, lifetime fecundity and subsequent recruitment. The current study aimed to determine if Sepioteuthis australis (Quoy and Gaimard, 1832), which spawns multiple times, produces mature oocytes for deposition in a continuous trickle or in larger discrete batches. Throughout a spawning season, developmental stages were assigned to the ovaries of each female by combining macroscopic and histological analyses of the oocyt

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Cavalheiro, Laísa W., and Clarice B. Fialho. "Reproductive strategy of a non-annual rivulid in a perennial wetland." Iheringia. Série Zoologia 105, no. 3 (2015): 288–96. http://dx.doi.org/10.1590/1678-476620151053288296.

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ABSTRACT Atlantirivulus riograndensis (Costa & Lanés, 2009) is a fish registered to the basin of Patos lagoon and the adjacent coastal plains in southern states of Rio Grande do Sul and Santa Catarina, Brazil, found in shallow water courses with that have large quantities of aquatic vegetation and forest edges. The objective of this study was to investigate the reproductive strategy and tactics of this species including the sex ratio, the length at first maturity, spawning type, fecundity and the possible associations among reproduction and abiotic factors. Sampling of specimens occurred i

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Alvarez, Paula, Maria Korta, Dorleta Garcia, and Guillermo Boyra. "Life History Strategy of Maurolicus muelleri (Gmenlin, 1789) in the Bay of Biscay." Hydrobiology 2, no. 2 (2023): 289–313. http://dx.doi.org/10.3390/hydrobiology2020019.

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Maurolicus muelleri is a significant component of the marine ecosystem and has the potential to be a valuable fishery resource. However, in the Bay of Biscay, its primary biological traits remain unclear. This study presents data on the length distribution, age, growth, maturity ogive, spawning season, batch fecundity, and sex ratio for Maurolicus muelleri captured in the Bay of Biscay. The results showed that in spring, the adult spawners (ages of 1 and 2) were dominant in the catches, while in September, immature juveniles (age of 0) born in spring were mostly found. Using standard lengths a

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Huse, Geir. "Sex-specific life history strategies in capelin (Mallotus villosus)?" Canadian Journal of Fisheries and Aquatic Sciences 55, no. 3 (1998): 631–38. http://dx.doi.org/10.1139/f97-275.

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The life history of capelin (Mallotus villosus) is presently suggested to be sex specific: while males follow a semelparous batch-spawning strategy, females are iteroparous. This hypothesis is based on predictions from a life history simulation model of Barents Sea capelin that shows that iteroparity is more profitable than semelparity for females, but for males, semelparity with several matings with females may be as profitable as iteroparity. These predictions are supported by (i) reports of males mating with several females during a spawning season, (ii) males having a lower gonadosomatic i

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Kruse, Gordon H., Jie Zheng, and Diana L. Stram. "Recovery of the Bristol Bay stock of red king crabs under a rebuilding plan." ICES Journal of Marine Science 67, no. 9 (2010): 1866–74. http://dx.doi.org/10.1093/icesjms/fsq136.

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Abstract Kruse, G. H., Zheng, J., and Stram, D. L. 2010. Recovery of the Bristol Bay stock of red king crabs under a rebuilding plan. – ICES Journal of Marine Science, 67: 1866–1874. After peak landings in 1980, the red king crab fishery in Bristol Bay (Alaska) was closed in 1983 because of stock collapse. In the following decade, small commercial harvests and additional fishery closures (1994 and 1995) associated with depressed stock status prompted a reappraisal of the management strategy. A length-based population model was developed, which provided an improved stock assessment for setting

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Chaput, G., J. Allard, F. Caron, J. B. Dempson, C. C. Mullins, and M. F. O'Connell. "River-specific target spawning requirements for Atlantic salmon (Salmo salar) based on a generalized smolt production model." Canadian Journal of Fisheries and Aquatic Sciences 55, no. 1 (1998): 246–61. http://dx.doi.org/10.1139/f97-252.

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Atlantic salmon (Salmo salar) management in eastern Canada is based on ensuring that there is sufficient spawning escapement to meet an egg deposition target that maximizes the production of smolts. Using available egg deposition to smolt production data, we show that the present strategy of basing spawning targets on the presence-absence of lacustrine habitat for the rearing of juvenile salmon is a valid approach. We further show that a general smolt production model that accounts for this difference in available habitat when combined with the biological characteristics of the recruiting adul

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Mullon, Christian, Philippe Cury, and Pierrick Penven. "Evolutionary individual-based model for the recruitment of anchovy (Engraulis capensis) in the southern Benguela." Canadian Journal of Fisheries and Aquatic Sciences 59, no. 5 (2002): 910–22. http://dx.doi.org/10.1139/f02-064.

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Evolutionary simulations are developed to explore environmental constraints that select observed spatial and temporal spawning patterns for anchovy (Engraulis capensis) in the southern Benguela. They couple a realistic three-dimensional hydrodynamic model with an individual-based model in which an evolutionary-based reproductive strategy for adult fish and a passive transport for early life stages are implemented. The evolutionary success of spawning is quantified when patterns at the population level emerge after many generations from constraints at the individual level through a selective pr

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Jordan, Alan R. "Reproductive biology, early life-history and settlement distribution of sand flathead (Platycephalus bassensis) in Tasmania." Marine and Freshwater Research 52, no. 4 (2001): 589. http://dx.doi.org/10.1071/mf99155.

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The life-history ecology of P. bassensis was examined to determine the spatial and temporal patterns of spawning, larval transport and settlement distribution in coastal and continental shelf waters of southern and eastern Tasmania. Larval development is characterized by a large size at flexion and pelvic and dorsal fin formation, lightly pigmented trunk and tail and the absence of strong teeth on the roof of the mouth or lower jaw. The distribution of spawning fish and larvae and patterns of hydrography indicate that spawning occurs throughout estuaries, coastal embayments and inshore shelf w

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Smukall, Matthew J., Amy Shaw, and Donald C. Behringer. "Effect of simulated catch-and-release angling on postrelease mortality and egg viability in sockeye salmon (Oncorhynchus nerka)." Canadian Journal of Fisheries and Aquatic Sciences 76, no. 12 (2019): 2390–95. http://dx.doi.org/10.1139/cjfas-2018-0426.

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Catch-and-release angling of salmonids is a widely implemented fisheries management strategy intended to provide recreational fishing opportunities while limiting harvest. Previous research has indicated mortality may be low, but the extent of sublethal impacts, including inability to reach spawning grounds or decreased spawning effectiveness, is relatively under-studied. Sockeye salmon (Oncorhynchus nerka) were subjected to simulated catch-and-release events, with a subset also enduring air exposure, to determine how physiological stress influences the ability of sockeye salmon to reach spawn

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Ohshimo, Seiji, Takuya Sato, Yumi Okochi, et al. "Evidence of spawning among Pacific bluefin tuna, Thunnus orientalis, in the Kuroshio and Kuroshio–Oyashio transition area." Aquatic Living Resources 31 (2018): 33. http://dx.doi.org/10.1051/alr/2018022.

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Reproductive characteristics are one of the key factors for understanding population dynamics in fishes. This study describes the spawning habitat of Pacific bluefin tuna (Thunnus orientalis) in the Kuroshio and the Kuroshio–Oyashio transition area. A total of 551 adult fish (fork length > 120 cm) were collected during 1994–2007 (except in 2001 and 2003) and 2016. Based on a histological analysis of the gonads, we concluded that actively spawning females were mainly present in late May to early July. Relative batch fecundity was significantly lower than that reported in the Sea of Japan but

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DEUDERO, S., A. GRAU, M. VÁZQUEZ-LUIS, E. ÁLVAREZ, C. ALOMAR, and I. E. HENDRIKS. "Reproductive investment of the pen shell Pinna nobilis Linnaeus, 1758 in Cabrera National Park (Spain)." Mediterranean Marine Science 18, no. 2 (2017): 271. http://dx.doi.org/10.12681/mms.1645.

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The spawning period can be a period of particular vulnerability for a species. In hermaphroditic species like the long-lived pen shell Pinna nobilis different costs could be associated with female, male or hermaphrodite stages. Here we evaluate gonad development in a population with few anthropogenic pressures and describe the timing and succession of developmental stages, determine the ratio of the sexes and the condition of the animals. We assess resource mobilisation and associated costs through the relationship between stable isotopes and condition indexes with reproductive parameters and

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Nigmatullin, Chingis M., and Unai Markaida. "Oocyte development, fecundity and spawning strategy of large sized jumbo squid Dosidicus gigas (Oegopsida: Ommastrephinae)." Journal of the Marine Biological Association of the United Kingdom 89, no. 4 (2008): 789–801. http://dx.doi.org/10.1017/s0025315408002853.

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Ovaries of 39 large jumbo squid Dosidicus gigas (415–875 mm mantle length (ML)) of different stages of maturity from the Gulf of California and Nicaragua were analysed. Oocyte development is asynchronous during female ontogenesis, with predominance (>85–90%) of small protoplasmic oocytes 0.1–0.2 mm in diameter for all stages of female maturity. Potential fecundity (PF) is determined at late immature stage II with average values around 18–21 million oocytes. The maximum PF estimated, 32 million oocytes, is so far the largest recorded for any cephalopod. PF is closely related to female size.

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Góngora-Gómez, Andrés Martín, Carlos Humberto Sepúlveda, Héctor Alejandro Verdugo Escobar, et al. "Gonadal maturity of Crassostrea corteziensis cultivated in the Gulf of California." Latin American Journal of Aquatic Research 48, no. 3 (2020): 381–95. http://dx.doi.org/10.3856/vol48-issue3-fulltext-2422.

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The gonadal maturation of the pleasure oyster Crassostrea corteziensis during four cultivation cycles (November 2004-June 2005, N4J5; August 2014-February 2016, A14F16; September 2015-December 2016, S15D16; September 2016-August 2017, S16A17) was studied in the southeastern Gulf of California, Mexico. Although C. corteziensis exhibited the typical reproductive phases (undifferentiated or resting, initial gametogenesis, advanced gametogenesis, maturity, spawning and post-spawning), the intensity of reproduction and the timing of the onset of the different phases of gonadal development varied in

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Chapman, Erik W., Christian Jørgensen, and Molly E. Lutcavage. "Atlantic bluefin tuna (Thunnus thynnus): a state-dependent energy allocation model for growth, maturation, and reproductive investment." Canadian Journal of Fisheries and Aquatic Sciences 68, no. 11 (2011): 1934–51. http://dx.doi.org/10.1139/f2011-109.

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The relationship between Atlantic bluefin tuna (ABFT, Thunnus thynnus ) life history patterns and environmental conditions was investigated by developing a state-dependent model that optimizes energy allocation between growth and energy stores and the decision to spawn. The model successfully recreates growth, age-at-maturity, and seasonal variability in condition for western ABFT that spawn primarily in the Gulf of Mexico. Eastern ABFT spawning in the Mediterranean Sea display a life history trajectory shifted toward earlier maturation and, perhaps, reduced growth — a pattern predicted by the

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Berejikian, B. A., E. P. Tezak, L. Park, E. LaHood, S. L. Schroder, and E. Beall. "Male competition and breeding success in captively reared and wild coho salmon (Oncorhynchus kisutch)." Canadian Journal of Fisheries and Aquatic Sciences 58, no. 4 (2001): 804–10. http://dx.doi.org/10.1139/f01-039.

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In the Pacific Northwest, releasing captively reared adult salmon (Oncorhynchus spp.) for natural spawning is an evolving strategy for the recovery of imperiled populations. However, the ability of captively reared fish to spawn naturally may be compromised by their artificial rearing environments. In this study, wild coho salmon (O. kisutch) males outcompeted captively reared males and controlled access to spawning females in 11 of 14 paired trials in laboratory stream channels. In two cases where satellite males were observed participating in spawning, DNA genotyping results determined that

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Myers, Ransom A., Susanna D. Fuller, and Daniel G. Kehler. "A fisheries management strategy robust to ignorance: rotational harvest in the presence of indirect fishing mortality." Canadian Journal of Fisheries and Aquatic Sciences 57, no. 12 (2000): 2357–62. http://dx.doi.org/10.1139/f00-250.

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We develop a simple theoretical model of yield and spawning stock biomass per recruit for the American sea scallop (Placopecten magellanicus), which appears to have high indirect fishing mortality when harvested with dredges, i.e., mortality caused by the act of fishing that does not result in landings. The age at and degree to which individuals are affected by the indirect mortality are unknown, and it does not appear possible to develop a robust harvest strategy with yearly harvests unless indirect fishing mortality is well quantified. We show that there could be substantial benefits to a ro

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