The relationship between otolith increments and time for yellowfin and skipjack tuna marked with tetracycline

Wild, A and Foreman, T.J. (1980) The relationship between otolith increments and time for yellowfin and skipjack tuna marked with tetracycline. Inter-American Tropical Tuna Commission Bulletin, 17(7), pp. 507-560.

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Abstract

ENGLISH: The rate at which increments are deposited on the sagittal otoliths of yellowfin (Thunnus albacares) and skipjack (Katsuwonus p elamis) tunas is determined by a markrecapture experiment using tetracycline. During growth in fork length from 40 to 110 em, and for a period of up to 389 days, yellowfin of the Revillagigedo Islands- Baja California region deposit one increment per day in either the postrostrum or rostrum position of the otolith. For skipjack of the same region, rostrum increments underestimate time by approximately 24 percent during growth from 42 to 64 cm and over the maximum interval of 249 days. The growth rate of each species is estimated from the recapture fork length and the linear change in an otolith dimension following tetracycline injection. Over specific ranges in fork length the rates are 3.06 and 1.15 em per month for yellowfin and skipjack, respectively. SPANISH: La rapidez (tasa) en la que se depositan los incrementos en los otolitos sagitales del aleta amarilla (Thunnus albacares) y el barrilete (Katsuwonus pelamis) se determina mediante un experimento al recapturar los peces que han sido marcados con tetraciclina. Durante el crecimiento de la longitud de horquilla de 40 a 110 cm y por un período hasta de 389 días, se forma en el aleta amarilla de la región de las Islas Revillagigedo-Baja California, un incremento diario ya sea en el parte del postrostrum o rostrum de los otolitos. Con respecto al barrilete de la misma region los incrementos en el rostrum subestiman aproximadamente el tiempo en un 24 por ciento durante el crecimiento de 42 a 64 cm y sobre un intervalo máximo de 249 días. El índice de crecimiento de cada especie se estima en la recaptura según la longitud de horquilla y el cambio lineal en la dimensión de un otolito después de la inyección de tetraciclina. La variación específica sobre la longitud de horquilla de los índices son 3.06 y 1.15 cm por mes para el aleta amarilla y el barrilete, respectivamente. (PDF contains 54 pages.)

Item Type: Article
Title: The relationship between otolith increments and time for yellowfin and skipjack tuna marked with tetracycline
Personal Creator/Author:
CreatorsEmail
Wild, A
Foreman, T.J.
Journal or Publication Title: Inter-American Tropical Tuna Commission Bulletin
Volume: 17
Number: 7
Page Range: pp. 507-560
Date: 1980
Issuing Agency: Inter-American Tropical Tuna Commission
Additional Information: This article is bilingual and contains both English and Spanish translations.
Uncontrolled Keywords: otolith; ageing; yellowfin; skipjack; tetracycline; otolitos; atún aleta amarilla; barrilete; tetraciclina
Subjects: Fisheries
Item ID: 3372
Depositing User: Joan Parker
Date Deposited: 13 May 2010 18:18
Last Modified: 29 Sep 2011 17:31
URI: http://aquaticcommons.org/id/eprint/3372

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