Age and growth of Astyanax eigenmanniorum (Cope) (Pisces, Characiformes) from San Roque Lake, Argentina

María J. Barla Instituto de Limnología “Dr. Raúl A. Ringuelet”; CONICET, calle 51 No 484‐C.C., La Plata, 712 1900, Argentina

Lauce R. Freyre Instituto de Limnología “Dr. Raúl A. Ringuelet”; CONICET, calle 51 No 484‐C.C., La Plata, 712 1900, Argentina

Liliana M. Giraudo Falcultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, Argentina

Mercedes Gutierrez Falcultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, Argentina

Eduardo D. Sendra Instituto de Limnología “Dr. Raúl A. Ringuelet”; CONICET, calle 51 No 484‐C.C., La Plata, 712 1900, Argentina

Abstract

The age and growth of Astyanax eigenmanniorum from San Roque Lake (Province of Córdoba, Argentina) were studied. During two years, 3,086 specimens were analysed; these were collected monthly by means of a dragging net. Lepidologic studies were made to determine age and growth.

Applying the traditional von Bertalanffy's model and Allen's method to length data, growth curves were drawn showing differences in both sexes; females having greater growth rate and asymtotic length than males. The relative condition factor and cephalic index show that during winter life conditions grow worse.

Reprints and Corporate Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

To request a reprint or corporate permissions for this article, please click on the relevant link below:

Order Reprints Request Corporate Permissions

Academic Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

Obtain permissions instantly via Rightslink by clicking on the button below:

Request Academic Permissions

If you are unable to obtain permissions via Rightslink, please complete and submit this Permissions form. For more information, please visit our Permissions help page.

Age and growth of Astyanax eigenmanniorum (Cope) (Pisces, Characiformes) from San Roque Lake, Argentina

Related Research Data

Information for

Open access

Opportunities

Help and information

Your download is now in progress and you may close this window

Login or register to access this feature

Age and growth of Astyanax eigenmanniorum (Cope) (Pisces, Characiformes) from San Roque Lake, Argentina

Abstract

Reprints and Corporate Permissions

Academic Permissions

Related Research Data

Related research

To cite this article:

Download citation

Information for

Open access

Opportunities

Help and information

Keep up to date