Bioaccumulation of tributyltin and its impact on spermatogenesis in mud crab Scylla serrata (Forskal)

Abstract

The effects of tributyltin (TBT) on the spermatogenesis of mud crab Scylla serrata were studied. TBT-exposed crabs exhibited a decrease in the gonadosomatic Index and the hepatosomatic Index compared to the crabs in the control group. Bioaccumulation of the TBT levels also varied in different tissues. The treated crabs showed variation in the weight of the testes with respect to TBT concentrations. Histological results clearly indicated that the control crabs showed spermatophores and granular substances were seen filling up the lumen of the seminiferous tubules. The testes of the experimental crabs illustrated that disruption in the seminiferous tubule membrane architecture, arrangement of spermatophores, granular substance, vacuolation, and reduction in the number of epithelial cells of the membrane were apparent in the seminiferous tubules. Biochemical constituents such as protein and glycogen contents also decreased in experimental crabs. Thus, TBT had significantly retarded the reproductive activity and substantially reduced the biochemical constituents ultimately led to impairment of spermatogenesis in the mud crab S. serrata.

Effects of tributyltin chloride on cell structures of epithelial layer in different stages of <i>Artemia salina</i> (Linnaeus, 1758)

“…In aquatic environments, the risk of TBTCl toxicity is considered greater for marine and freshwater organisms (Ranilalitha et al, 2014). In marine water species, TBTCl has the ability to accumulate in the bodies of crustaceans and fish than in ambient water and subsequently transferred to the food chain (Cuypers et al, 2010;Peranandam et al, 2013;Ranilalitha et al, 2014). Therefore, a greater understanding of the sublethal effects of TBTCl on marine water crustacean species is a high priority for research.…”

EFFECT OF FOOD TYPES AND HABITATS ON THE VALUE OF FEMALE MATURITY INDEX (FMI) AND GONADO SOMATIC INDEX (GSI) IN THE EGG PRODUCTION OF MANGROVE CRABS, Scylla serrata

“…The purpose of the research is to study the effects of food types and habitats on the value of female maturity index (FMI) and gonado-somatic index (GSI). The FMI was determined to classify the developing gonad stages (Poovachiranon, 1991) and the GSI value is used as indicator for sexual development and reproductive cycle in aquatic organisms (Peranandam et al, 2013).…”