Reproductive strategy of the ghost shrimp Callichirus major (Crustacea: Axiidea: Callianassidae) from the southwestern Atlantic: sexual maturity of females, fecundity, egg features, and reproductive output

Autor(es)

Peiro, Douglas Fernando ^{[1, 2]} ; Wehrtmann, Ingo S. ^{[3, 4]} ; Mantelatto, Fernando Luis ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Fac Philosophy Sci & Letters Ribeirao Preto FFCLR, Lab Bioecol & Crustacean Systemat LBSC, Dept Biol, Postgrad Program Comparat Biol, BR-14040901 Ribeirao Preto, SP - Brazil

^[2] Univ Araraquara Uniara, Lab Aquat Biol, Dept Biol Sci & Hlth DCBS, Araraquara, SP - Brazil

^[3] Univ Costa Rica, Unidad Invest Pesquera & Acuicultura UNIP, Ctr Invest Ciencias Mar & Limnol CIMAR, San Jose 115012060 - Costa Rica

^[4] Univ Costa Rica, Escuela Biol, Museo Zool, San Jose 115012060 - Costa Rica

• Tipo de documento: Artigo Científico
• Fonte: INVERTEBRATE REPRODUCTION & DEVELOPMENT; v. 58, n. 4, p. 294-305, 2014.
• Citações Web of Science: 5

Resumo

Reproduction and reproductive investment of females is an intriguing feature in axiidean shrimps. They have a cryptic behavior and great ecological importance in sediment turnover, and recycling of organic material and nutrient. Herein, we describe different aspects of the reproductive biology (size at sexual maturity of females, fecundity, egg characteristics, and reproductive output {[}RO]) of the ghost shrimp Callichirus major from the southeastern coast of Brazil. Females reached sexual maturity at sizes >= 11.85 mm dorsal oval length. Fecundity increased significantly with female size and varied between 1455 and 9931 eggs (average 4564 eggs). Individual egg volume almost doubled during embryogenesis, and average egg water content increased during the incubation period from 75.0 to 93.3%. The egg mass comprised on average 13.2% of the dry body weight of females. This relatively high RO value is probably compensatory to the relatively low number of ovigerous females in axiidean populations. The few published data on RO values suggest that female investment in reproduction of axiidean shrimps is somewhat higher than in other decapods. The high investment in egg production reflects most likely an effort to maximize the viability of the progeny. Studies with additional congeneric species will clarify whether there is a tendency of axiidean shrimps to have RO values at the upper end of the range reported for decapods. (AU)

• Processo FAPESP: 09/54931-0 - Melhoria e capacitação das coleções científicas do Departamento de Biologia da Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo
• Beneficiário: Carlos Alberto Garofalo
• Modalidade de apoio: Auxílio à Pesquisa - Programa Infraestrutura - Acervos biológicos
• 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
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Temático