Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.12/1462
Título: Implications of different brood pouch structures in syngnathid reproduction
Autor: Monteiro, Nuno Miguel
Almada, Vítor Carvalho
Vieira, Maria Natividade
Data: 2005
Editora: Oxford University Press
Citação: Journal of the Marine Biological Association of the United Kingdom, 85, 1235-1241
Resumo: The evolutionary radiation of the family Syngnathidae was accompanied by a diversification of structures involved in male parental care whose anatomical variations may signal differences in reproductive strategies, with increasing egg protection possibly affecting female investment in offspring or larvae quality at the end of the embryonic development phase. An analysis of egg numbers showed signi¢cant differences between syngnathids with and without marsupium, suggesting that the brood pouch, besides increasing protection to the male and its eggs, also introduced the ability to carry an additional number of o¡spring per pregnancy, from one or more females. Curiously, even though larvae sizes do not significantly differ between the considered brooding structures (controlling for male length), seahorse larvae were smaller than expected, given the large volume of the pear-shaped eggs. These observations suggest that the sealed seahorse pouch, although allowing the transport of a great number of offspring and capable of multiple consecutive pregnancies, may impose serious functional constraints, namely those related with oxygenation of the developing larvae, thus explaining the increased egg surface together with the presence of specific salinity control mechanisms inside the marsupium.
Peer review: yes
URI: http://hdl.handle.net/10400.12/1462
ISSN: 0025-3154
Aparece nas colecções:UIE-E - Artigos em revistas internacionais

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