Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.12/1295
Título: Intra-sexual variation in male reproduction in teleost fish: A comparative approach
Autor: Oliveira, Rui Filipe
Ros, Albert F. H.
Gonçalves, David
Palavras-chave: Sexual plasticity
Alternative reproductive tactics
Fish
Androgens
Testosterone
11-ketotestosterone
Arginine vasotocin
Reproductive behavior
Data: 2005
Editora: Elsevier
Citação: Hormones and Behavior, 48, 430-439
Resumo: The occurrence of intra-sexual variation in reproduction is a widespread phenomenon in teleosts. One such form of variation consists in the occurrence of alternative male types: males that invest resources in mate attraction and males that exploit the investment of the former males, by trying to sneak fertilizations during spawning. These alternative reproductive tactics can be classified according to their plasticity during the life span of the individuals (i.e., fixed vs. sequential vs. reversible). Furthermore, the differences between morphs within a given species may involve a set of different traits, including reproductive behavior, the differentiation of male morphological traits, and the patterns of gonad tissue allocation and the differentiation of gonadal accessory glands. In this paper, we review the available data on four species exhibiting different types of intra-sexual plasticity in reproduction that have been studied in our lab. The data on the proximate mechanisms, androgens and forebrain arginine-vasotocin (AVT), underlying these alternative tactics suggest that between-morph differences in androgen levels, especially in 11-ketotestosterone, are especially present in species where the alternative male types have evolved morphological traits that are tactic-specific (i.e., sexual polymorphisms) and that differences in AVT appear to be related to between-morph differences in the expression of courtship behavior. Therefore, this comparative approach leads us to propose that the different endocrine systems are involved in the differentiation of different sets of traits that make up alternative phenotypes, and that the differentiation of alternative tactics is not controlled by a single endocrine system (e.g., androgens).
Peer review: yes
URI: http://hdl.handle.net/10400.12/1295
ISSN: 0018-506X
Aparece nas colecções:UIE-E - Artigos em revistas internacionais

Ficheiros deste registo:
Ficheiro Descrição TamanhoFormato 
Hormones and Behavior 48 430-439.pdf231,86 kBAdobe PDFVer/Abrir


FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpace
Formato BibTex MendeleyEndnote Degois 

Todos os registos no repositório estão protegidos por leis de copyright, com todos os direitos reservados.