Results 251 to 260 of about 6,536,704 (287)

Yield-Per-Recruit Estimates for Eastern Tropical Atlantic Yellowfin Tuna

Transactions of the American Fisheries Society, 1972
Abstract Estimates of instantaneous total mortality for eastern tropical Atlantic yellowfin tuna range from 1.52 to 2.32. First capture for most probable maximum yield per recruit should occur between ages 1.9 and 3.3. Within this range the values of age at first capture tend to cluster around 2.5 years, or about 100 cm and 22 kg.
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Further Perspectives on Yield per Recruit Analysis and Biological Reference Points

Canadian Journal of Fisheries and Aquatic Sciences, 1991
Spawner–recruit relationships (SRRs) are indeterminate for most species. Earlier workers proposed solving "amount of harvest" problems for such cases by tacitly assuming that the SRR is density independent (a straight line through the origin) for the available data.
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Incorporating Mortality from Catch and Release into Yield-per-Recruit Analyses of Minimum-Size Limits

North American Journal of Fisheries Management, 1986
Abstract We evaluated the effect on yield per recruit of mortality from catch and release of fish smaller than a legal minimum length. Catch-and-release mortality reduces the potential effectiveness of minimum size limits for increasing yield per recruit by an amount that depends on the fishing mortality coefficient, the minimum size limit, and the ...
James R. Waters, Gene R. Huntsman
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Analysis of Potential Yield per Recruit for Striped Bass Produced in Chesapeake Bay

North American Journal of Fisheries Management, 1984
Abstract The yield of striped bass (Morone saxatilis) in biomass and numbers was estimated for constant recruitment of young fish into the population on the basis of vital statistics of the Maryland stock. Separate computations were performed for males, females, and sexes combined.
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Growth and mortality of exploited fishes in China's coastal seas and their uses for yield-per-recruit analyses

Journal of Applied Ichthyology, 2017
Given the scarcity of information suitable for other forms of fish stock assessments, the growth, and mortality of 10 important marine exploited fishes in China's coastal seas were estimated, based on published length‐frequency data and the ELEFAN approach and software.
C. Liang, D. Pauly
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Yield-per recruit analyses on Parapenaeopsis stylifera and Metapenaeus dobsoni from Kerala State, India

Journal of Applied Ichthyology, 1986
Summary The stocks of shrimps Parapenaeopsis stylifera and Metapenaeus dobsoni in the fishery of two areas of Kerala coast in India have been studied using length frequency data. The average annual stocks of the two species have been indicated. The present status of fishery shows a differential fishing pressure for males and females of P. stylifera,
Alagaraja, K, George, M J, Kurup, K N, Suseelan, C   +3 more
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An Experimental Determination of the Effect of Increasing the Minimum Age (or Size) of Fish at Capture upon the Yield per Recruit

Canadian Journal of Fisheries and Aquatic Sciences, 1984
The aim of this paper is to describe a tag release–recapture experiment designed to determine the quantitative effect of increasing the minimum age (or size) of fish at capture upon the yield per recruit for the current intensity of fishing, if the minimum age corresponding to the maximum catch weight per recruit for this fishing intensity is greater ...
Jacek Majkowski, William S. Hearn, Ronald L. Sandland   +2 more
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Bioeconomic analysis of a minimum size limit for Gulf of Alaska sablefish using a yield per recruit model

Fisheries Research, 1991
Abstract To evaluate the potential of increasing yield in the Gulf of alaska sablefish (Anoplopoma fimbria) fishery with a minimum size limit, a modified yield per recruit analysis was used to explore trends in yield, equilibrium biomass, reproductive potential, and economic value.
Sandra A. Lowe, Jeffrey T. Fujioka, Joseph M. Terry   +2 more
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Yield-per-recruit and egg-per-recruit analyses of the Omani abalone, Haliotis mariae

Marine and Freshwater Research, 1995
The 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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Estimation of yield per recruit when growth and fishing mortality oscillate seasonally [PDF]

ICLARM Fishbyte, 1991
A general form of the yield equation is presented. This is used to investigate the effects of seasonal growth oscillations on estimation of yield per recruit. The results show that these effects will be strongest in short-lived organisms such as penaeid shrimps.
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