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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Peiro, Douglas Fernando [1, 2] ; Wehrtmann, Ingo S. [3, 4] ; Mantelatto, Fernando Luis [1]
Total Authors: 3
[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
Total Affiliations: 4
Document type: Journal article
Source: INVERTEBRATE REPRODUCTION & DEVELOPMENT; v. 58, n. 4, p. 294-305, 2014.
Web of Science Citations: 5

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)

FAPESP's process: 09/54931-0 - Improvement and management of biological specimen collections at the Departamento de Biologia, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo
Grantee:Carlos Alberto Garofalo
Support type: Research Infrastructure Program - Biological specimen collections
FAPESP's process: 10/50188-8 - Decapod crustaceans: multi-disciplinary characterization of the sea biodiversity of the State of São Paulo (taxonomy, spermiotaxonomy, molecular biology and population dynamics)
Grantee:Fernando Luis Medina Mantelatto
Support type: BIOTA-FAPESP Program - Thematic Grants