Results 161 to 170 of about 5,723,328 (199)
Comparing three indices of catch per unit effort using Bayesian geostatistics
Fisheries Research, 2009 In assessing a fish stock, indices based on catch per unit effort (CPUE) are frequently used. Estimates of three indices of catch per unit effort were compared here (CPUE1, CPUE2 and CPUE3), considering the fitting of two models: (i) a bivariate geostatistical model for catch and effort; (ii) a bivariate model where catch and effort were considered ...
Pereira, Julio Cesar +3 more
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Relation of "Catch per Unit Effort" to Abundance and Rate of Exploitation
Journal of the Fisheries Research Board of Canada, 1940 Two extreme types of fisheries are set up for analysis. In type I natural mortality and recruitment are negligible while fishing is in progress; in type II natural mortality, recruitment and fishing mortality all occur throughout the year at a uniform rate.
W. E. Ricker
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CATCH PER UNIT EFFORT FOR MOOSE: A NEW APPROACH USING WEIBULL REGRESSION
Journal of Wildlife Management, 2005Abstract The relationship between hunters and their environment is a key component in managing wildlife populations. Identifying hunter's characteristics, motivations, and efforts is crucial to understanding if a hunt will be successful. We predicted that landscape characteristics and moose (Alces alces) densities would affect success of hunts.
Jennifer I Schmidt +2 more
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Catch per unit effort modelling for stock assessment: A summary of good practices
Fisheries ResearchSimon D Hoyle +2 more
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Is catch-per-unit-effort proportional to abundance?
Canadian Journal of Fisheries and Aquatic Sciences, 2001We compiled 297 series of catch-per-unit-effort (CPUE) and independent abundance data (as estimated by research trawl surveys) and used observation error and random effects models to test the hypothesis that CPUE is proportional to true abundance. We used a power curve, for which we were interested in the shape parameter (β).
Shelton J Harley +2 more
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Hunter Reporting of Catch per Unit Effort as a Monitoring Tool in a Bushmeat‐Harvesting System
Conservation Biology, 2010Abstract: Growing threats to biodiversity in the tropics mean there is an increasing need for effective monitoring that balances scientific rigor with practical feasibility. Alternatives to professional techniques are emerging that are based on the involvement of local people.
Janna, Rist +3 more
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Catch per unit effort trends in the coastal fishery of Manzanillo, Colima, Mexico
Fisheries Management and Ecology, 1997The catch per unit effort (CPUE) values, expressed as kg trip–1 in a coastal fishery, were considered to be an index of resource abundance to explain changes through time. The trends in catch and effort for three commercial landing sites in Manzanillo and Santiago Bays in Colima, Mexico, were analysed for the period November 1982 to May 1991.
E. ESPINO‐BARR +3 more
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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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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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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
openaire +1 more source