Mortality and Growth of Young-of-the-Year Striped Bass in the Hudson River Estuary

Dey, William P.

doi:10.1577/1548-8659(1981)110<151:magoys>2.0.co;2

Cited by 48 publications

(20 citation statements)

References 4 publications

(2 reference statements)

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“…Similar size-specific mortality data were lacking for weakfish and bluefish; therefore, we applied a weight-specific mortality equation for striped bass to populations of all three predator species. Natural mortality rates of striped bass were obtained from the literature (Chadwick 1968;Dey 198 where M is the instantaneous natural mortality sate and W is wet weight (g). This size-based natural mortality relationship was used in a spreadsheet with the seasonal weights of each predator species and cohort (Figs.…”

Section: Daymentioning

confidence: 99%

Predatory demand and impact of striped bass, bluefish, and weakfish in the Chesapeake Bay: applications of bioenergetics models

Harfmart¹,

Brandt²

1995

Can. J. Fish. Aquat. Sci.

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We applied bioenergetics models for dominant Chesapeake Bay piscivores, striped bass (Morone saxatilis), bluefish (Pornatomus saltabrix), and weakfish (Cynoscior~ regalis), along with site-specific data on diets, growth, and energy density, to examine trophic linkages and the relationship of predatory demand to prey supply. Atlantic menhaden (Brevonrtia tyrcznraus), bay anchovy (AncBzoa naitcbzilli), and spot (Leiostc~mus xanthurr~~) accounted for 65-9996 of the annual biomass of piscivore diets (excluding age-0 striped bass that ate mostly invertebrates). The diets of young piscivores were dominated by anchovy, but menhaden and spot became increasingly important to older fish. Young (age < 2) striped bass ate mostly benthic prey. Older striped bass fed increasingly on pelagic sources, primarily menhaden, but bluefish and weakfish increased benthic resource use from 10% at age O to 50% by age 2. Comparison of consumption (supply) to demand (potential consumption) measured the suitability of Chesapeake Bay for predator production. Bluefish came closest to achieving their demand for prey, suggesting that they are more successful predators than either striped bass or weakfish. Results suggest that Chesapeake Ray may be a better nursery than production area for older fish, and prey supply (not temperature) may account for the movements and use of the estuary by older piscivores.

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Section: Daymentioning

confidence: 99%

Predatory demand and impact of striped bass, bluefish, and weakfish in the Chesapeake Bay: applications of bioenergetics models

Harfmart¹,

Brandt²

1995

Can. J. Fish. Aquat. Sci.

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“…Once hatched, eggs were allocated to cohorts. The importance of low temperature anomalies to striped bass egg survival has been described based on field observations (Dey 1981) and has been modeled (Boreman 1983). Temperature or predation can cause mortality of eggs in the field.…”

Section: Egg Production Subunitmentioning

confidence: 99%

A model of survival and growth of striped Pass larvae Morone saxatilis in the Potomac River, 1987

Chesney¹

1993

Mar. Ecol. Prog. Ser.

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ABSTRACT. A StellaTM lnodel based on laboratory-derived growth data was developed to simulate abundances, cohort survival and growth rates of striped bass eggs and larvae. The goal was to compare the simulations to 1987 field survey results from the Potomac River (Cheasapeake Bay, USA). Key factors in the model were striped bass egg production, water temperature, surface light and penetration, turbidity and zooplankton concentration. Growth and survival were simulated from the predicted effects of turbidity. light at depth, and zooplankton concentration. Predation terms simulated survival under different predation pressures. The model estimated dally ~nstantaneous growth rates ranging from -0.07 to 0.19 d -' The model predicted poor survival and growth of cohorts produced early in the spawning season when water temperatures and zooplankton concentration were low. Mortality of eggs was predicted to be 54 % by simulation with most of the mortality att~ibutable to low temperatures early in the spawning season. Simulated growth rates ranged widely and were highest in the down river sections of the Potomac. Predicted groxvth was in close agreement with field estimates during the second half of the spawning season. Early in the season, field growth rates were higher than those modeled, possibly because survival was more growth-rate dependent a t that time than later when temperature, light a n d food levels were nearer to optimum. Trends in simulated larval abundances resembled Potomac River estimates but there were differences in simulated peak abundances. Mortality was partitioned and attributed to causes other than that caused by low temperature anomalies and growth-dependent factors. The difference between modeled and field observed larval abundances estimated a rate of mortality for 'other' causes at 13.7 ";I d-', a rate that can readily be attributed to predation.

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“…Because the optimal VR shifts with length within the window, a particular VR would be optimal even more briefly (over only 1 to 3 days). Mortality rate is believed to be extremely high during the larval period in fishes and to decline precipitously during the juvenile period (e.g., Dey, 1981;Vetter, 1988). The changes in VR distribution observed within the selection window in this study suggest that even though selective predation may operate only very briefly, larval mortality rates are high enough for it to have an important impact on relative fitness.…”

Section: Ecological Significancementioning

confidence: 99%

The Functional Basis of Natural Selection for Vertebral Traits of Larvae in the Stickleback Gasterosteus aculeatus

Swain¹

1992

Evolution

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Previous studies have demonstrated selective predation for vertebral traits of larvae in the stickleback Gasterosteus aculeatus. I tested the hypothesis that this selection results from a direct functional advantage to particular vertebral phenotypes by direct measurement of the burst swimming performance of larvae. Within a narrow window of lengths, burst speed did depend on vertebral phenotype. As in the previous predation experiments, performance was related more directly to the ratio of abdominal to caudal vertebrae (VR) than to the total number of vertebrae (VN), and the optimal VR decreased as larval length increased. Changes with length in the vertebral phenotype frequencies of wild larvae provided evidence of selection for VR and for VN in the wild. Larvae with particular VR increased in frequency in the wild at just those lengths when their relative performance was superior in the laboratory. The observed pattern of length-dependent selection for vertebral number provides an explanation for the widespread trends in vertebral number that occur among populations of related fishes.

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Mortality and Growth of Young-of-the-Year Striped Bass in the Hudson River Estuary

Cited by 48 publications

References 4 publications

Predatory demand and impact of striped bass, bluefish, and weakfish in the Chesapeake Bay: applications of bioenergetics models

Predatory demand and impact of striped bass, bluefish, and weakfish in the Chesapeake Bay: applications of bioenergetics models

A model of survival and growth of striped Pass larvae Morone saxatilis in the Potomac River, 1987

The Functional Basis of Natural Selection for Vertebral Traits of Larvae in the Stickleback Gasterosteus aculeatus

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