Gonadal development in the freshwater crab Sylviocarcinus pictus (H. Milne Edwards, 1853) (Brachyura: Trichodactylidae) from the Guamá river, state of Pará, Brazil

Abstract

The development stages of male and female gonads in the freshwater crab Sylviocarcinus pictus (H. Milne Eduards, 1853) were described through macroscopic and microscopic (histology) examinations. The histological description was based on 40 specimens (20 each sex). Four gonadal development stages were found for females: immature, ripening, mature and spawned. The following female cells were found: ovogonia, oocytes in initial vitellogenesis, oocytes in advanced vitellogenesis, follicular cells and post-ovulatory follicles. Three development stages were found for males: immature, maturing and mature, with the indication of: spermatogonia, spermatocytes, spermatids, spermatozoids and spermatophores. These data suggest the pattern described in the literature. Size at sexual maturity was 32.3 mm of carapace width for males and 31.5 mm for females. The gonadal stages observed macroscopically by volume and color were validated through histological analysis and proved to be useful method for the rapid identification of sexual maturity in the species. The present study offers previously unpublished data on the reproductive biology of Sylviocarcinus pictus.

Effects of naloxone, serotonin, and dopamine on reproduction of the freshwater crabBarytelphusa guerini

“…The organs were removed from the saline, lightly blotted on paper towels, and weighed wet on an electronic balance. The female reproductive stages (previtellogenic, vitellogenic I, II, and III), were identified (Ding et al, ; Silva et al, ) and the molt stages were observed using setal development in the mastigobranch of third maxillipede (Reddy et al, ).…”

Extension range of four species of freshwater crabs (Decapoda: Trichodactylidae) in the state of Maranhão, Northeastern Brazil

“…Northeastern South America and Amazon basin in Guyana, French Guyana, Colombia, Brazil, Peru, and Bolivia (Magalhães, 2003a;Magalhães, 2003b;Alves et al, 2010;Silva et al, 2012;Lima et al 2013). Distribution.…”

SIZE AT SEXUAL MATURITY OF NIPA-OBLIGATE CRAB Labuanium politum (CRUSTACEA: SESARMIDAE); HARVESTING PLAN PRECEDING COMMERCIALISATION

“…Size at sexual maturity is the most important parameters in studying the life history of an organism (Abrams & Rowe, 1996). The gonads of crabs are in the cephalothorax above hepatopancreas (Silva et al, 2012). The male reproductive system consists of a pair of testes, a pair of vas deferens and two pairs of gonopods (Erkan et al, 2009) and the female reproductive system consists of a pair of ovaries, ovarian ducts and a pair of spermathecae (Silva et al, 2012).…”

“…The gonads of crabs are in the cephalothorax above hepatopancreas (Silva et al, 2012). The male reproductive system consists of a pair of testes, a pair of vas deferens and two pairs of gonopods (Erkan et al, 2009) and the female reproductive system consists of a pair of ovaries, ovarian ducts and a pair of spermathecae (Silva et al, 2012). Histological methods are commonly used to determine the development of gonads and maturation (Silva et al, 2012).…”

“…The male reproductive system consists of a pair of testes, a pair of vas deferens and two pairs of gonopods (Erkan et al, 2009) and the female reproductive system consists of a pair of ovaries, ovarian ducts and a pair of spermathecae (Silva et al, 2012). Histological methods are commonly used to determine the development of gonads and maturation (Silva et al, 2012). Besides that, the gonadal development stages can also be recognised from the outer morphological appearances as had been done on Sesarma rectum (Leme, 2005), Anamathia rissoana (Mura et al, 2005), and Armases rubripes (Lima et al, 2006).…”