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The challenges of asymmetric mating – the influence of male and female size on the reproductive output of Acanthochondria cornuta (Chondracanthidae)

Published online by Cambridge University Press:  19 September 2016

D. G. FRADE Open the ORCID record for D. G. FRADE [Opens in a new window] ,
S. NOGUEIRA ,
M. J. SANTOS  and
F. I. CAVALEIRO
D. G. FRADE*
Affiliation:
Centro Interdisciplinar de Investigação Marinha e Ambiental (CIIMAR/CIMAR), Universidade do Porto, Rua dos Bragas 289, 4050-123 Porto, Portugal
S. NOGUEIRA
Affiliation:
Departamento de Biologia, Universidade do Porto, Faculdade de Ciências, Rua do Campo Alegre, s/n, Edifício FC4, 4169-007 Porto, Portugal
M. J. SANTOS
Affiliation:
Centro Interdisciplinar de Investigação Marinha e Ambiental (CIIMAR/CIMAR), Universidade do Porto, Rua dos Bragas 289, 4050-123 Porto, Portugal Departamento de Biologia, Universidade do Porto, Faculdade de Ciências, Rua do Campo Alegre, s/n, Edifício FC4, 4169-007 Porto, Portugal
F. I. CAVALEIRO
Affiliation:
Centro Interdisciplinar de Investigação Marinha e Ambiental (CIIMAR/CIMAR), Universidade do Porto, Rua dos Bragas 289, 4050-123 Porto, Portugal Departamento de Biologia, Universidade do Porto, Faculdade de Ciências, Rua do Campo Alegre, s/n, Edifício FC4, 4169-007 Porto, Portugal
*
*Corresponding author: Centro Interdisciplinar de Investigação Marinha e Ambiental (CIIMAR/CIMAR), Universidade do Porto, Rua dos Bragas 289, 4050-123 Porto, Portugal, Portugal. E-mail: dgfrade@gmail.com
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Summary

The reproductive strategy of Acanthochondria cornuta, a parasitic copepod with dwarf, hyperparasitic males, is described in detail. The potential impact of male parasitism on the reproductive output was evaluated by determining the size of each sex and the female's fecundity, egg size and total reproductive effort for each pair/trio throughout the four seasons of the year. Marked seasonal differences were observed in female size and reproductive output, suggesting two distinct generations, but no differences were observed for male size. No statistically significant correlations were observed between male size and any measure of reproductive effort, but females with larger males had lower fecundity. A trade-off between egg number and egg size was recorded. Overall, the reproductive effort in A. cornuta seems to be determined mostly by female size, and larger females do not hold smaller males.

Keywords

sexual size dimorphismreproductive strategyparasitic copepodsChondracanthidaeAcanthochondria cornuta
Type
Research Article
Information
Parasitology , Volume 143 , Issue 14 , December 2016 , pp. 1945 - 1953
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Copyright
Copyright © Cambridge University Press 2016 

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