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Comparison of Two Methods of Estimating the Variance of the Estimate of Catch Per Unit Effort
Canadian Journal of Fisheries and Aquatic Sciences, 1980Two methods of estimating the variance of the estimate of catch per unit effort are compared empirically here. The second method, an application of the Jackknife estimator proved to be the overall best technique due to its generality. In addition the Jackknife method provides means for the estimation of confidence intervals.Key words: catch per unit ...
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Environmental Modelling & Software, 2001
Abstract The spatial and temporal dynamics of populations of migratory fish and associated fishing patterns give rise to data from which it is difficult to obtain clear signals about population size and distribution. Use of modified General Linear Models (GLMs) for obtaining information about the population is explained and demonstrated by way of ...
A. David McDonald +2 more
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Abstract The spatial and temporal dynamics of populations of migratory fish and associated fishing patterns give rise to data from which it is difficult to obtain clear signals about population size and distribution. Use of modified General Linear Models (GLMs) for obtaining information about the population is explained and demonstrated by way of ...
A. David McDonald +2 more
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Marine and Freshwater Research, 2009
Spatial scale is an important factor that needs to be considered in data collection and analysis in ecological studies. Studies focusing on the quantitative evaluation of impacts of spatial scales are, however, limited in fisheries. Using the Chinese squid-jigging fishery in the north-western Pacific Ocean as an example, we evaluated impacts of spatial
Siquan Tian +4 more
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Spatial scale is an important factor that needs to be considered in data collection and analysis in ecological studies. Studies focusing on the quantitative evaluation of impacts of spatial scales are, however, limited in fisheries. Using the Chinese squid-jigging fishery in the north-western Pacific Ocean as an example, we evaluated impacts of spatial
Siquan Tian +4 more
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Catch per unit of effort and growth of flounder (Platichthys flesus): impact of temperature
2007No abstracts are to be cited without prior reference to the author.Decrease of the catch ability and fishing mortality in gillnets in conditions of long-range lower water temperatures cause underestimation of the population size, while catch ability dynamics of traps affects the stock abundance indices in opposite direction.
Drevs, Tenno, Jaanus, A., Põllumäe, A.
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Influence of Trap Saturation on Estimates of Animal Abundance Based on Catch Per Unit Effort
Oikos, 1976Estimates of animal abundance based on catch per unit effort may seriously underestimate the abundance when a considerable proportion of traps are released during a trapping period. This paper derives equations which may be used to calculate an index which avoids the bias arising from trap saturation.
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Standardized Catch Per Unit Effort Indices for Bottomfish Management Unit Species of Guam, 1982–2023
NOAA technical memorandum NMFS PIFSC ...Bohaboy, Erin C., Matthews, Toby
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The reliability of the catch per unit effort as a measure of abundance in North Sea trawl fisheries
1964This publication is part of Rapport et Proces-Verbaux des Reunions Vol. 155. To see all other articles in this volume, please click on the keyword "RPVR Vol. 155".During the past thirty years the c.p.e. of plaice by English trawlers has changed appreciably, especially during and just after the war; some of these changes can be shown to be almost ...
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Routine methods used by ICES member countries for determining catch per unit effort
1965Routine methods used by ICES member countries for determining catch per unit ...
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