Length-frequency estimation for yellowfin tuna (Thunnus albacares) caught by commercial fishing gear in the Eastern Pacific Ocean

Tomlinson, Patrick K. and Tsuji, Sachiko and Calkins, Thomas P. (1992) Length-frequency estimation for yellowfin tuna (Thunnus albacares) caught by commercial fishing gear in the Eastern Pacific Ocean. Inter-American Tropical Tuna Commission Bulletin, 20(6), pp. 357-398.

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Abstract

ENGLISH: Methods of collecting samples for the purpose of estimating the numbers and weights of fish caught, by length interval, are described. Several models for two-stage sampling are described, and the equations for the estimators and their variances are given. The results from a brief simulation study are used to show the differences between estimates made with the different models. Estimators for the average weights of fish in the catch and their variances are also described. These average weights are used to provide improved estimates of the total annual catches of yellowfin taken from the eastern Pacific Ocean, east of 150°W, between 1955 and 1990. SPANISH: Se describen los métodos de recoger de muestreo para estimar el número o peso de peces capturados, por intervalo de talla. Se describen varios modelos para el muestreo de dos etapas, y se presentan las ecuaciones para los estimadores y sus varianzas. Se usan los resultados de un breve estudio de simulación para indicar las diferencias entre estimaciones realizadas con los distintosmodelos. También se describe un estimador para el peso promedio de peces en la captura y su varianza. Se usan estos estimadores para calcular estimaciones mejoradas de las capturas anuales totales de aleta amarilla tomadas del Océano Pacífico oriental, al este de 150°W, entre 1955 y 1990. (PDF contains 41 pages.)

Item Type: Article
Title: Length-frequency estimation for yellowfin tuna (Thunnus albacares) caught by commercial fishing gear in the Eastern Pacific Ocean
Personal Creator/Author:
CreatorsEmail
Tomlinson, Patrick K.
Tsuji, Sachiko
Calkins, Thomas P.
Journal or Publication Title: Inter-American Tropical Tuna Commission Bulletin
Volume: 20
Number: 6
Page Range: pp. 357-398
Date: 1992
Issuing Agency: Inter-American Tropical Tuna Commission
Additional Information: This article is bilingual and contains both Spanish and English translations.
Uncontrolled Keywords: length-frequency estimation; yellowfin tuna; Thunnus albacares; commercial fishing; Eastern Pacific Ocean; estimación de las frecuencias de talla; atún aleta amarilla; Océano Pacifico Oriental
Subjects: Fisheries
Item ID: 3511
Depositing User: Joan Parker
Date Deposited: 05 Jun 2010 06:52
Last Modified: 29 Sep 2011 17:16
URI: http://aquaticcommons.org/id/eprint/3511

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