Analysis of Fishing Power Correction Factor Estimates from a Trawl Comparison Experiment
- 1 February 1998
- journal article
- Published by Oxford University Press (OUP) in North American Journal of Fisheries Management
- Vol. 18 (1) , 11-18
- https://doi.org/10.1577/1548-8675(1998)018<0011:aofpcf>2.0.co;2
Abstract
Four published analytical techniques were applied to comparative trawl data to obtain fishing power correction (FPC) factors for 12 major commercial species that were caught by two resource assessment trawls used by the National Marine Fisheries Service (Alaska Fisheries Science Center). Fishing power correction techniques included ratios of catch per unit effort (CPUE), randomized block analysis of variance (ANOVA), standard least-squares regression, and a method developed by Kappenman. All four estimators generally gave similar results for species that were clearly caught in higher proportion by one trawl, but they differed in the magnitude of the adjustment. For Pacific cod Gadus macrocephalus and sablefish Anoplopoma fimbria, which were caught at very similar rates during the experiment, FPC estimates close to 1.0 (no difference between trawls) were obtained from each technique, but they differed regarding which trawl was most efficient. The Kappenman estimator gave FPC estimates of 1.0 for s...Keywords
This publication has 4 references indexed in Scilit:
- Properties of Catch Rates Used in Analysis of Angler SurveysTransactions of the American Fisheries Society, 1995
- Robust estimation of the ratio of scale parameters for positive random variablesCommunications in Statistics - Theory and Methods, 1992
- The statistical design of comparative fishing experimentsFisheries Research, 1990
- Relative Efficiency of two Bottom Trawls in Catching Juvenile and Commercial-sized Flatfishes in the Gulf of St. LawrenceJournal of Northwest Atlantic Fishery Science, 1984