Reproduction and spawning in walleye (Stizostedion vitreum)

Malison, Jeffrey A.; Held, James A.

doi:10.1111/j.1439-0426.1996.tb00081.x

Cited by 30 publications

(10 citation statements)

References 15 publications

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“…Underlying this response is the strong association between fall growth and energetic condition of Lake Erie's walleye spawning stock and subsequent age-0 year-class strength (Henderson and Nepszy 1994). The importance of fall growth to reproductive potential is not surprising, as gonadal development (i.e., vitellogenesis, spermatogenesis) is nearly complete by late fall -early winter (Malison et al 1994;Malison and Held 1996). Whether female walleye spawn in spring is apparently determined by the level of surplus energy for allocation to vitellogenesis during the previous autumn (Henderson and Nepszy 1994).…”

Section: Predatory Demand By Lake Erie Walleyementioning

confidence: 99%

Modeling sources of variation for growth and predatory demand of Lake Erie walleye (Stizostedion vitreum), 1986-1995

Kershner¹,

Schael²,

Knight³

et al. 1999

Can. J. Fish. Aquat. Sci.

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Abstract:Given the variable nature of the Lake Erie ecosystem, we investigated biotic and abiotic sources of variation for walleye (Stizostedion vitreum) growth, consumption, and population-wide predatory demand. We determined how temperature, population structure, and age-specific consumption influenced walleye growth and consumption during 1986-1995. For each year, we used individual-based bioenergetics modeling to compare growth and consumption by walleye in Lake Erie's western or central basin with those of walleye moving seasonally between basins. Population structure strongly affected walleye growth and consumption but had little influence on interbasin growth rate comparisons. Based on water temperature alone, growth and consumption by western basin walleye were generally lower than for central basin or migratory populations and were more limited by summer water temperatures. In simulations combining effects of population structure, temperature, and age-specific consumption, migratory walleye grew most rapidly, taking advantage of temperature-related growth peaks in both basins. Estimates of walleye predatory demand declined with population size from 1988 through 1995. With natural feedbacks, predatory demand interacts with prey production, limiting walleye reproductive potential when prey availability is low. However, immediate impact on predatory inertia is limited, complicating our ability to predict how predatory demand and prey availability interact in Lake Erie.Résumé : Étant donné la nature variable de l'écosystème du lac Érié, nous avons examiné les sources biotiques et abiotiques de variation de la croissance, de la consommation et de la demande de prédation à l'échelle de la population chez le doré jaune (Stizostedion vitreum). Nous avons déterminé en quoi la température, la structure de la population et la consommation spécifique à l'âge influaient sur la croissance et la consommation des dorés entre 1986 et 1995. Pour chaque année, nous avons eu recours à la modélisation bioénergétique individuelle pour comparer la croissance et la consommation chez les dorés du bassin du centre ou de l'ouest du lac Érié et chez des dores qui se déplacent de façon saisonnière entre les bassins. La structure des populations affectait fortement la croissance et la consommation des dores jaunes, mais avait peu d'influence sur les comparaisons des taux de croissance entre bassins. Si l'on se fondait seulement sur la température, la croissance et la consommation chez les dorés jaunes du bassin occidental étaient dans 1'ensemble inférieures à celles des dorés du bassin central ou des populations migratrices, et étaient plus limitées par les hautes températures estivales. Dans des simulations combinant les effets de la structure démographique, de la température et de la consommation spécifique à l'âge, les dorés migrateurs se développaient plus vite car ils tiraient profit des pics de croissance liés à la température dans les deux bassins. Les estimations de la demande de prédation des dorés ont baissé avec l'effecti...

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Section: Predatory Demand By Lake Erie Walleyementioning

confidence: 99%

Modeling sources of variation for growth and predatory demand of Lake Erie walleye (Stizostedion vitreum), 1986-1995

Kershner¹,

Schael²,

Knight³

et al. 1999

Can. J. Fish. Aquat. Sci.

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“…Reproduction of Eurasian perch, Perca fluviatilis, has received little attention contrary to other percids such as yellow perch, Perca flavescens, (Dabrowski et al, 1996) and walleye Stizostedion vitreum (Malison et al, 1994;Malison and Held, 1996). Limited data exists concerning the endocrine control of the reproductive cycle of this species, especially during the final maturation and ovulation stages.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of sex steroids in final oocyte maturation and induced ovulation in female Eurasian perch, Perca fluviatilis

Migaud¹

2003

Aquatic Living Resources

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This study was designed to specify the testosterone (T), estradiol-17b (E 2) and 17,20b-dihydroxy-4-pregnen-3-one (17,20b-P) variations during the pre-ovulatory period in female Eurasian perch, Perca fluviatilis, and also examine the ovarian synthesis of 17,20b-P and 17,20b,21-trihydroxy-4-pregnen-3-one (20b-S). Five females (100-300 g) were collected from a concrete pond from the Lindre Center (Moselle, France) between March and April 1999, three times a week, and sex steroids measured. Two females were also collected from the Lindre pond on three dates (18 February, 14 and 23 March) for an in vitro study. Significant plasma 17,20b-P peaks were measured for the first time in this species reaching 3.5 ng ml-1. However, the synthesis and release of 17,20b-P in blood seems to not be synchronized with the final maturation and ovulation stages. The in vitro study showed that ovaries at the pre-ovulatory stage produce some 17,20b-P but no 20b-S from a tritiated precursor (17-P-3 H). 17,20b-P is produced after 30 min and is still present in the medium after 2 h of incubation, but is no longer detectable after 4 h. Some other non-identified compounds were synthesized at this stage suggesting that 17,20b-P was quickly metabolized. Moreover, the plasma level increases, observed in spawned females suggest that this steroid might be involved in the oviposition process. These results suggest a role for 17,20b-P in the final stages of oocyte development.

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“…In contrast to angling, spearing on the spawning grounds strongly selects for males. We suggest that the reason for this is that males arrive on the spawning grounds first and wait for the females to arrive and spawn (Malison and Held 1996). Males also remain on the spawning grounds for a period of time after peak spawning.…”

Section: Discussionmentioning

confidence: 94%

Size‐ and Sex‐Specific Capture and Harvest Selectivity of Walleyes from Tagging Studies

et al. 2014

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Estimates of size-and sex-specific gear selectivity are important for making informed management decisions. Sexspecific selectivity curves may be needed for two-sex statistical catch-at-age models when information about sex ratios in the catch is unavailable. We used data from three tagging programs in Minnesota and Wisconsin to estimate the size-and sex-specific selectivity of angling and spearing for Walleyes Sander vitreus. We estimated capture selectivity (the relative catchability of each component of the population) and harvest selectivity (the combined effect of capture selectivity and the decision to retain or release a fish from a given component). These components are of interest because (1) the hooking mortality of released fish contributes substantially to total mortality, so that it is important to know how harvest and release vary by size; and (2) capture selectivity is likely similar across lakes, such that data from other lakes may provide information on capture selectivity for the lake of interest, while harvest selectivity is lake specific. Estimates were obtained using generalized linear models to determine the significance of the individual and interactive effects of length and sex on selectivity. Angling capture and harvest selectivity were both greater for females than males of every length. In contrast, spearing harvest selectivity was greater for males. For both sexes, harvest selectivity for angling and spearing peaked at around 400-450 mm. The capture selectivity of anglers peaked at 350-375 mm. The interaction between sex and size was significant for capture selectivity for angling, with the sex effect for small fish being less than that for large fish. Above 400 mm, spearing selectivity did not appear to vary with length for either sex, but at lengths below that it was lower for males.

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Reproduction and spawning in walleye (Stizostedion vitreum)

Cited by 30 publications

References 15 publications

Modeling sources of variation for growth and predatory demand of Lake Erie walleye (Stizostedion vitreum), 1986-1995

Modeling sources of variation for growth and predatory demand of Lake Erie walleye (Stizostedion vitreum), 1986-1995

Synthesis of sex steroids in final oocyte maturation and induced ovulation in female Eurasian perch, Perca fluviatilis

Size‐ and Sex‐Specific Capture and Harvest Selectivity of Walleyes from Tagging Studies

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