Edad de la trucha arco iris (Salmo gairdneri) de la laguna Zeta (Prov.de Chubut)

Guerrero, C.A. and Lafarga, A. (1986) Edad de la trucha arco iris (Salmo gairdneri) de la laguna Zeta (Prov.de Chubut). Mar del Plata, Argentina, Instituto Nacional de Investigación y Desarrollo Pesquero, (INIDEP. Informes Técnicos del Departamento de Aguas Continentales, 4)

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Abstract

Age of a population of rainbow trout (Salmo gairdneri) from a pond in Patagonia was studied by means of scale readings. The population was sampled three times, on December 1984, March 1985 and March 1986. Length at age was back-calculated from growth marks on scales, using the Fraser-Lee equation. By the analysis of length distributions and numbers of marks on scales from each sample, it was concluded that this population was formed by a single cohort, born in spring 1982 and stocked shortly after. Stocking rate is unknown. Significant differences (P0.05) were found between back-calculations of length at age 1 from samples of December 1984 and March 1986. These differences were probably due to length-scale radius relation. Evidences from scales suggested that a single mark is formed each year, during early-mid spring. On the other hand, according to availabe data from the literature for the same species, this population has presented one of the highest growth rates. (pdf contains 15 pages)

Item Type: Monograph or Serial Issue
Title: Edad de la trucha arco iris (Salmo gairdneri) de la laguna Zeta (Prov.de Chubut)
Personal Creator/Author:
CreatorsEmail
Guerrero, C.A.
Lafarga, A.
Series Name: INIDEP. Informes Técnicos del Departamento de Aguas Continentales
Number: 4
Date: 1986
Publisher: Instituto Nacional de Investigación y Desarrollo Pesquero
Place of Publication: Mar del Plata, Argentina
Issuing Agency: Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP), Mar del Plata, Argentina
Additional Information: 15pp.
Uncontrolled Keywords: Argentina; Patagonia; Chubut; Laguna Zeta;Salmoniformes; Salmonidae; Salmo gairdneri; Trucha arco iris; age determination; scale reading; growth curves; determinación de edad; curvas de crecimiento; lectura de escamas
Subjects: Limnology
Item ID: 1726
Depositing User: Librarian Gabriela Silvoni
Date Deposited: 20 Nov 2008 20:34
Last Modified: 29 Sep 2011 20:08
URI: http://aquaticcommons.org/id/eprint/1726

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