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Size and age at sexual maturity in Adelomelon brasiliana (Neogastropoda: Volutidae) off Argentina

Published online by Cambridge University Press:  15 February 2008

Maximiliano Cledón ,
Wolf Arntz  and
Pablo E. Penchaszadeh
Maximiliano Cledón*
Affiliation:
CONICET-Laboratorio de Biología y Cultivo de Crustáceos Marinos, Departamento Ciencias Marinas-FCEyN, Universidad Nacional de Mar del Plata, Funes 3350, Mar del Plata 7600, Province de Buenos Aires, Argentina
Wolf Arntz
Affiliation:
Alfred Wegener Institut, Columbusstrasse, Bremerhaven 27568, Germany
Pablo E. Penchaszadeh
Affiliation:
CONICET-Laboratorio 19 Invertebrados I. Departamento Biología, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab II. C1428EHA, Buenos Aires, Argentina
*
Correspondence should be addressed to: Maximiliano Cledón CONICET-Laboratorio de Biología y Cultivo de Crustáceos Marinos Departamento Ciencias Marinas-FCEyNUniversidad Nacional de Mar del PlataFunes 3350 Mar del Plata 7600 Province de Buenos AiresArgentina email: mcledon@mdp.edu.ar
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Abstract

Size at first maturity of Adelomelon brasiliana near Mar del Plata, Argentina, was established analysing gonad tissue samples and the secondary sexual characters. Age was determined through growth marks. Gonad matures after development of secondary sexual characters.

Minimum shell length at sexual maturity is 107 mm in females and 102 mm in males. The shell length at which 50% of the animals are mature is 115.1 mm in females and 107.25 mm in males (approximatley 7 years of age). In males, penis matures before testis. All animals are mature beyond 125 mm in females and 115 mm in males, respectively (approximatley 8 years of age). The comparative late sexual maturation in this species makes the population quite sensitive to over-fishing.

Keywords

mollusc fisherysouth-western AtlanticBrazilnorthern Patagonia
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 88 , Issue 1 , February 2008 , pp. 169 - 173
Copyright
Copyright © Marine Biological Association of the United Kingdom 2008

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