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Evolution of spermatophore transfer mechanisms in cephalopods

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Autor(es):
Amoroso Rodriguez Marian, Jose Eduardo
Número total de Autores: 1
Tipo de documento: Artigo Científico
Fonte: Journal of Natural History; v. 49, n. 21-24, p. 33-pg., 2015-04-30.
Resumo

Spermatophores from coleoid cephalopods are capable of functioning autonomously during mating, attaching themselves to the female body through the "spermatophoric reaction". In decapodiforms this attachment involves some varying degree of implantation into female tissue, herein divided into shallow and deep implantation. This paper reviews the literature concerning the phenomenon of spermatophore implantation, and presents evidence corroborating a theoretical model ascribing the role of implantation to the ejaculatory apparatus, an invaginated tube found in the spermatophore oral region. In light of parsimonious character optimizations performed on published phylogenetic trees, two hypotheses for the evolution of spermatophore transfer mechanisms are tested. One hypothesis assumes that deep implantation arose first, shallow implantation evolving later associated with the emergence of specialized receptacles. The second hypothesis assumes that shallow implantation emerged first, deep implantation arising later, possibly associated with the adoption of deep-water lifestyles. Support for each hypothesis is dependent upon the phylogeny under consideration. (AU)

Processo FAPESP: 04/13212-7 - Biologia reprodutiva de Loligo plei Blainville, 1823 (Cephalopoda: Loliginidae): anatomia descritiva e funcional dos sistemas reprodutores masculino e feminino e evidências histológicas
Beneficiário:José Eduardo Amoroso Rodriguez Marian
Modalidade de apoio: Bolsas no Brasil - Doutorado Direto
Processo FAPESP: 12/14140-6 - Cephalopod International Advisory Council Symposium 2012 (CIAC '12)
Beneficiário:Maria de Los Angeles Gasalla
Modalidade de apoio: Auxílio Organização - Reunião Científica
Processo FAPESP: 13/02653-1 - Evolução dos mecanismos de transferência de espermatozóides em Cephalopoda: convergências adaptativas associadas a transições de habitats marinhos?
Beneficiário:José Eduardo Amoroso Rodriguez Marian
Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado