Results 221 to 230 of about 41,970 (253)
Some of the next articles are maybe not open access.
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.
exaly +2 more sources
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
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source
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 ...
openaire +1 more source
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
openaire +1 more source
North American Journal of Fisheries Management, 2013
Abstract Equilibrium yield models predict the total biomass removed from an exploited stock; however, traditional yield models must be modified to simulate roe yields because a linear relationship between age (or length) and mature ovary weight does not typically exist. We extended the traditional Beverton–Holt equilibrium yield model to
Michael E. Colvin +2 more
openaire +1 more source
Abstract Equilibrium yield models predict the total biomass removed from an exploited stock; however, traditional yield models must be modified to simulate roe yields because a linear relationship between age (or length) and mature ovary weight does not typically exist. We extended the traditional Beverton–Holt equilibrium yield model to
Michael E. Colvin +2 more
openaire +1 more source
Yield per Recruit and Management Recommendations for Alaska Plaice in the Eastern Bering Sea
North American Journal of Fisheries Management, 1990Abstract Adult Alaska plaice Pleuronectes quadrituberculatus are abundant over the continental shelf (40–110-m depths) during the summer, move to the outer shelf during the winter, and return to the shelf in spring. Female Alaska plaice mature at a total length of about 31 cm (6–7 years), and peak spawning occurs during April.
Chang Ik Zhang, Donald R. Gunderson
openaire +1 more source
Mixed-Species Yield-per-Recruitment Analyses Accounting for Technological Interactions
Canadian Journal of Fisheries and Aquatic Sciences, 1984Multipecies fishery assessment models may be divided into two general categories: those involving analyses of the trophic interdependence of species (biological interactions) and those addressing the question of co-occurrence in fishing gear (technological interactions). Certainly, both categories of interactions may occur simultaneously. Nevertheless,
openaire +2 more sources
Updated Yield-per-Recruit Information on the Tortugas Pink Shrimp Fishery
North American Journal of Fisheries Management, 1986Abstract Portions of a 1979 analysis dealing with optimum-size considerations in the Tortugas, Florida, pink shrimp (Penaeus duorarum) fishery are updated. The 1979 management advice remains essentially the same. The current target minimum size of 103 mm total length theoretically should produce a 14-20% gain, compared to unregulated conditions, in ...
openaire +1 more source