Results 221 to 230 of about 9,471 (259)

Is catch-per-unit-effort proportional to abundance?

Canadian Journal of Fisheries and Aquatic Sciences, 2001
We 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, Ransom A Myers, Alistair Dunn   +2 more
openaire   +1 more source

Estimating whole-lake fish catch per unit effort

Fisheries Research, 2015
Abstract The European standard for gillnet sampling to characterize lake fish communities stratifies sampling effort ( i.e. , number of nets) within depth strata. Nets to sample benthic habitats are randomly distributed throughout the lake within each depth strata.
Alexander, Timothy, Vonlanthen, Pascal, Periat, Guy, Degiorgi, F., Raymond, J.C., Seehausen, Ole   +5 more
openaire   +1 more source

Catch per unit effort modelling for stock assessment: A summary of good practices

Fisheries Research
Simon D Hoyle, Robert A Campbell, Nicholas D Ducharme-Barth   +2 more
exaly   +2 more sources

CATCH PER UNIT EFFORT FOR MOOSE: A NEW APPROACH USING WEIBULL REGRESSION

Journal of Wildlife Management, 2005
Abstract 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, Jay M Ver Hoef, R Terry Bowyer   +2 more
exaly   +2 more sources

A comparison of methods for calculating Catch Per Unit Effort (CPUE) of gill net catches in lakes

Fisheries Research, 2008
Abstract Fish constitute an important component of lake ecosystems and many different methods have been used for fish assessment. Based on gill net catches in two stratified (max depth = 14–22 m) eutrophic Danish lakes, relative fish abundance measured as Catch Per Unit Effort (CPUE) was calculated.
Lauridsen, Torben Linding; id_orcid 0000-0003-0139-2395, Landkildehus, Frank, Jeppesen, Erik, Jørgensen, Torben Bramming, Søndergaard, Martin; id_orcid 0000-0002-1514-0482   +4 more
openaire   +2 more sources

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.
openaire   +1 more source

Hunter Reporting of Catch per Unit Effort as a Monitoring Tool in a Bushmeat‐Harvesting System

Conservation Biology, 2010
Abstract:  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, E J, Milner-Gulland, Guy, Cowlishaw, Marcus, Rowcliffe   +3 more
openaire   +2 more sources

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, Leandro, Roseli Aparecida, Petrere, Miguel, Nishida, Tom   +3 more
openaire   +2 more sources

Catch per unit effort trends in the coastal fishery of Manzanillo, Colima, Mexico

Fisheries Management and Ecology, 1997
The 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, R. MACíAS‐ZAMORA, M. CRUZ‐ROMERO, A. GARCIA‐BOA   +3 more
openaire   +1 more source

Comparison of Two Methods of Estimating the Variance of the Estimate of Catch Per Unit Effort

Canadian Journal of Fisheries and Aquatic Sciences, 1980
Two 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 ...
openaire   +1 more source