NDLI: Modelling the contact probability and size-selectivity of toothed dredges

Content Provider	Springer Nature Link
Author	Mituhasi, Takahisa Kitakado, Toshihide Hu, Fuxiang Tokai, Tadashi
Copyright Year	2005
Abstract	To estimate fishing gear selectivity of clam dredges from data of paired-gear tests in the SELECT analysis process, this paper presents a statistical model of the probability of a clam coming into contact with the dredge teeth and size-selectivity of the control gear. The net-mouth available selectivity is defined as the product of the probability of a clam contacting the dredge teeth and size-selectivity induced by tooth spacing. The model based on the SELECT analysis was tested by using data generated by virtual paired-gear test in which the control dredge of the smallest tooth spacing is assumed to be size-selective. No clear difference in shell length distribution between dredges of different tooth spacings was found in the simulation when the contact probability was small. The plots of proportion of clams caught in the test dredge to the total catch number of clams were U-shaped, and the model fitted the data well. For each simulation consisting of 500 replications, the sample mean and mean square error of each parameter were obtained to evaluate the performance of estimation by comparing with the true value. Parameters were properly estimated with the model.
Starting Page	703
Ending Page	712
Page Count	10
File Format	PDF
ISSN	09199268
Journal	Fisheries Science
Volume Number	71
Issue Number	4
e-ISSN	14442906
Language	English
Publisher	Springer-Verlag
Publisher Date	2005-01-01
Publisher Place	Tokyo
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	available selection clam contact probability contact selection dredge fishing gear selectivity Fish & Wildlife Biology & Management Freshwater & Marine Ecology Food Science
Content Type	Text
Resource Type	Article
Subject	Aquatic Science

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