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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Morphological analysis of the female reproductive system of Stenorhynchus seticornis (Brachyura: Inachoididae) and comparisons with other Majoidea

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Autor(es):
Antunes, Mariana [1, 2] ; Zara, Fernando Jose [3, 4] ; Lopez-Greco, Laura S. [5, 6] ; Negreiros-Fransozo, Maria Lucia [1, 2]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] Sao Paulo State Univ, NEBECC Study Grp Crustacean Biol Ecol & Culture, Inst Biosci, BR-18618970 Botucatu, SP - Brazil
[2] Sao Paulo State Univ, IEAMar UNESP, BR-18618970 Botucatu, SP - Brazil
[3] Sao Paulo State Univ, IML Invertebrate Morphol Lab, Dept Appl Biol, Aquaculture Ctr CAUNESP, BR-14884900 Jaboticabal, SP - Brazil
[4] Sao Paulo State Univ, IEAMar UNESP, BR-14884900 Jaboticabal, SP - Brazil
[5] Univ Buenos Aires, Dept Biodivers & Expt Biol, Biol Reprod & Growth Decapod Crustaceans Lab, C1428 EHA, Buenos Aires, DF - Argentina
[6] CONICET UBA, IBBEA, C1428EGA, Buenos Aires, DF - Argentina
Número total de Afiliações: 6
Tipo de documento: Artigo Científico
Fonte: Invertebrate Biology; v. 135, n. 2, p. 75-86, JUN 2016.
Citações Web of Science: 9
Resumo

We examined the female reproductive system of the yellowline arrow crab Stenorhynchus seticornis by means of histological and histochemical techniques. Mature specimens obtained in the field were kept in the laboratory for mating experiments. After 24h, newly mated females were dissected, and their reproductive trait routinely processed for embedding in historesin. The specimens examined each possessed a pair of kidney-shaped seminal receptacles (SR), and these we classified as ventral type, based on the location of the oviduct opening. The mesodermal dorsal region (DR) of SR consisted of a stratified epithelium with scaly cells, while the ectodermal ventral region (VR) was composed of a simple epithelium covered by a cuticle. The oviduct opened at the transition region (TR) between DR and VR and had no velum. The simple epithelium of TR had more folds on the face of the oviduct opening. The vagina exhibited the same features as the TR epithelium and was contiguous to VR, anchored by muscles. In the lumen, from one to three strata of sperm packets were observed, the dorsal one containing free sperm, and the most ventral stratum, spermatophores. An acidophilic glycoprotein layer enclosed the strata. Spermatophores in the ventral stratum were enclosed in a voluminous secretion, composed by acid polysaccharides most likely from the last male mated. The ventral-type receptacle, stratified sperm packets, and polyandry, usually observed in females of Majoidea, suggest the occurrence of sperm competition in S. seticornis, favoring the sperm of the last male mated, as its sperm mass is located near the opening of the female oviduct. (AU)

Processo FAPESP: 10/50188-8 - Crustáceos decápodes: multidisciplinaridade na caracterização da biodiversidade marinha do estado de São Paulo (taxonomia, espermiotaxonomia, biologia molecular e dinâmica populacional) (Biodiversidade Marinha)
Beneficiário:Fernando Luis Medina Mantelatto
Linha de fomento: Auxílio à Pesquisa - Programa BIOTA - Temático