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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.)

Male reproductive system of the arrow crab Stenorhynchus seticornis (Inachoididae)

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Antunes, Mariana [1] ; Zara, Fernando J. [2, 3] ; Lopez Greco, Laura S. [4] ; Negreiros-Fransozo, Maria L. [1]
Total Authors: 4
[1] Sao Paulo State Univ, Inst Biosci, NEBECC Study Grp Crustacean Biol Ecol & Culture, BR-18618970 Botucatu, SP - Brazil
[2] Univ Estadual Paulista UNESP, Dept Appl Biol, Aquaculture Ctr CAUNESP, IML, BR-14884900 Jaboticabal, SP - Brazil
[3] Univ Estadual Paulista UNESP, IEAMar, BR-14884900 Jaboticabal, SP - Brazil
[4] Univ Buenos Aires, CONICET UBA, Dept Biodiversidad & Biol Expt, Fac Ciencias Exactas & Nat, IBBEA, Ciudad Univ, C1428EGA, Buenos Aires, DF - Argentina
Total Affiliations: 4
Document type: Journal article
Source: Invertebrate Biology; v. 137, n. 2, p. 171-184, JUN 2018.
Web of Science Citations: 3

Our aim was to describe the reproductive system of males and the formation of sperm packages in the seminal receptacle (SR) of recently mated females of the arrow crab Stenorhynchus seticornis. The male reproductive system was analyzed, and was described using light microscopy and histological and histochemical methods. The first pair of gonopods was described by means of scanning electron microscopy. Additionally, the dehiscence of spermatophores was tested using samples obtained from the vas deferens of males and from the seminal receptacle of recently mated females. Testes were tubular type, and each vas deferens consisted of three regions: the anterior vas deferens (AVD), including a proximal portion that was filled with free spermatozoa and a distal portion contained developing spermatophores; the median vas deferens (MVD) that contained completely formed spermatophores; and the posterior vas deferens (PVD), which contained only granular secretions. The accessory gland, which was filled with secretions, was located in the transition region between the MVD and the PVD. The spermatophores from the MVD were of different sizes, and none of them showed dehiscence in seawater, whereas those spermatophores in contact with the seminal receptacle were immediately broken. The ultrastructure of the gonopods revealed the presence of denticles at the distal portion, which contribute to the mechanical rupture of the spermatophore wall during the transfer of sperm. The contents of the PVD and accessory gland of males are transferred together with the spermatophores, and are responsible for the secretions observed among the sperm packets in the SR of the female. We suggest that these secretions formed the layers found in the SR of recently mated females, and may play a role in sperm competition in arrow crabs. (AU)

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