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Assessing discarding at sea using a length-structured yield-per-recruit model
Fisheries Research, 1997Abstract Discarding at sea is a common practice in fisheries. Part of the catch is often discarded because fish are too small to be marketed, or are bycatch. Regulations such as trip limits or quota limitations also provide fishermen with a strong incentive to discard fish that are above their quota and to high grade to maximize profits.
Y. Chen, G.N.G. Gordon
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Application of a Yield and Egg-per-Recruit Model to the Lobster Fishery in the Bay of Fundy
North American Journal of Fisheries Management, 1985Abstract A dynamic pool model was applied to assess the effect of changes in fishing pressure, increases in recruit size, and establishing a maximum size or a ‘closed window’ size regulation on yield and eggs per recruit for lobsters (Homarus americanus) in the Bay of Fundy.
Alan Campbell
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Yield-per-recruit and egg-per-recruit analyses of the Omani abalone, Haliotis mariae
Marine and Freshwater Research, 1995The fecundity, size at sexual maturity, sex ratios and total mortality of Haliotis mariae on the Dhofar coast of the northern Arabian Sea were measured. These data, and estimates of the growth rate, were used for yield-per-recruit and egg-per-recruit analyses. Maximum yields occur at 3+ to 4+ years of age, depending on the natural mortality rate chosen.
SA Shepherd, JL Baker, DW Johnson
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Parameter Uncertainty and Simple Yield-per-Recruit Analysis
Transactions of the American Fisheries Society, 1988Abstract Simple yield-per-recruit analysis is a useful stock assessment tool for fishery management. We present a Monte Carlo-based method that incorporates available knowledge of parameter uncertainty on the three-parameter yield-per-recruit model of Beverton and Holt.
Victor R. Restrepo, William W. Fox
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Fisheries Research, 2004
Fishery regulations for Oregon ocean shrimp, Pandalus jordani, are designed to protect age 1 shrimp from overharvest and sustain long-term fishery benefits. Designing appropriate management regulations including minimum mesh size and season dates is complicated by the interaction of natural mortality, fishing mortality, and market factors including ...
Charmaine Marie Gallagher +2 more
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Fishery regulations for Oregon ocean shrimp, Pandalus jordani, are designed to protect age 1 shrimp from overharvest and sustain long-term fishery benefits. Designing appropriate management regulations including minimum mesh size and season dates is complicated by the interaction of natural mortality, fishing mortality, and market factors including ...
Charmaine Marie Gallagher +2 more
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North American Journal of Fisheries Management, 1984
Abstract The Canadian deepwater redfish (Sebastes mentella) fishery in the Atlantic ocean tends to be concentrated in a limited depth range to maximize catch rates and optimize size composition of the catches that vary with depth. Thus, the assumption of Beverton and Holt's yield-per-recruit analysis that all fish are equally subject to fishing ...
W. G. Doubleday, D. Rivard, W. D. Mckone
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Abstract The Canadian deepwater redfish (Sebastes mentella) fishery in the Atlantic ocean tends to be concentrated in a limited depth range to maximize catch rates and optimize size composition of the catches that vary with depth. Thus, the assumption of Beverton and Holt's yield-per-recruit analysis that all fish are equally subject to fishing ...
W. G. Doubleday, D. Rivard, W. D. Mckone
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Some conceptual remarks on yield per recruit
Fisheries Research, 1992Abstract Computations needed to carry out yield-per-recruit (YPR) analysis are examined in order to provide an in-depth interpretation of this method. The following conclusions are reached. (a) When used for management purposes, YPR computations implicitly set a relationship between spawning stock biomass (SSB) and recruitment (R), and yield per ...
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A Generalized Computer Program For the Ricker Model of Equilibrium Yield Per Recruitment
Journal of the Fisheries Research Board of Canada, 1967The Ricker method for predicting the yield per recruitment from a stock of fish under various conditions is superior to that of Beverton and Holt (1957) under most conditions because it permits greater flexibility of the input of growth and mortality data.
G. J. Paulik, William H. Bayliff
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