Trawl survey based abundance estimation using data sets with unusually large catches | Zendy

Russell F. Kappenman | Zendy

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Trawl survey based abundance estimation using data sets with unusually large catches

Author(s) -

Russell F. Kappenman

Publication year - 1999

Publication title -

ices journal of marine science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.348

H-Index - 117

eISSN - 1095-9289

pISSN - 1054-3139

DOI - 10.1006/jmsc.1998.0422

Subject(s) - groundfish , statistics , abundance (ecology) , mathematics , unit (ring theory) , survey data collection , estimation , geography , fishery , economics , biology , fishing , mathematics education , management , fisheries management

A method for estimating mean catch per unit effort (c.p.u.e.) with groundfish trawl survey data is proposed and examined in detail. The new method is a modificaiton of the arithmetic average of the survey c.p.u.e.s. It is meant to be applied to those cases where one or more of the survey c.p.u.e.s are excessively large and exert too much influence on the arithmetic average, when it is used to estimate mean catch per unit effort. These large c.p.u.e.s are replaced by estimates of their expected values.

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