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Reproductive traits of horned octopus Eledone cirrhosa in Atlantic Iberian waters

Published online by Cambridge University Press:  26 March 2013

Marcos Regueira ,
Angel F. González ,
Ángel Guerra  and
Amadeu Soares
Marcos Regueira*
Affiliation:
CSIC Instituto de Investigaciones Marinas, Eduardo Cabello 6, 36208 Vigo, Spain Departamento de Biologia, Universidade de Aveiro,3810-193 Aveiro, Portugal
Angel F. González
Affiliation:
CSIC Instituto de Investigaciones Marinas, Eduardo Cabello 6, 36208 Vigo, Spain
Ángel Guerra
Affiliation:
CSIC Instituto de Investigaciones Marinas, Eduardo Cabello 6, 36208 Vigo, Spain
Amadeu Soares
Affiliation:
Departamento de Biologia, Universidade de Aveiro,3810-193 Aveiro, Portugal
*
Correspondence should be addressed to: M. Regueira, CSIC Instituto de Investigaciones Marinas, Eduardo Cabello 6, 36208 Vigo, Spain email: regueira@iim.csic.es
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Abstract

Length–weight relationships, sex-ratio, maturity patterns, size at first maturity, reproductive outputs, fecundity and spawning period of horned octopus Eledone cirrhosa in north-west Iberian coast are presented for the first time. Samples were collected between February 2009 and July 2011 in four fishing ports along the north-west Iberian coast: Burela in north Galician waters (NGW), Ribeira or Bueu in western Galician waters (WGW), and Aveiro in western Portuguese waters (WPW). A total of 4127 individuals (1042 males, 3079 females and six undetermined) were sampled. Individuals ranged from 45 to 191 mm dorsal mantle length (ML) and 15–1159 g body weight (BW). The overall sex-ratio was biased towards females, accounting for 74.71% of whole sample. Main spawning season of this species in north-western Iberian waters extends from May to June. Size at first maturity (ML50%) of males was 108.9 mm in NGW, 99.25 mm in WGW, and 91.4 mm in WPW, whereas ML50% for females were 134.5 mm, 121.4 mm and 100.8 mm, respectively. Potential fecundity was 2452.88 ± 36.4 oocytes per ovary (N = 697). Mean oocyte length was 3.89 ± 0.025 mm (N = 697). The average number of fully developed spermatophores in mature males was 86.55 ± 1.9 (N = 223) with a mean length of 44.97 ± 0.29 mm (N = 224). Potential fecundity in females was significantly (P < 0.05) correlated with ML and BW. Results obtained suggest that energy for gonad growth comes from the diet rather than endogenous reserves.

Keywords

Eledone cirrhosareproductive biologymaturationnorth-west Iberian waters
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 93 , Issue 6 , September 2013 , pp. 1641 - 1652
Copyright
Copyright © Marine Biological Association of the United Kingdom 2013 

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