Effect of selected biogenic amines on reproduction in the fresh water edible crab, Oziotelphusa senex senex

Distribution of serotonin and dopamine in the central nervous system of the female mud crab, Scylla olivacea (Herbst)

“…In our study, the crabs taken for the experiment had fully mature ovaries, and 5-HT-ir present in cells of several clusters and neuropils in the brain was relatively more intense than DA-ir, hence 5-HT may potentially regulating the release of reproductive neuropeptides, similar to those described previously in other decapods. 5-HT has been shown to stimulate gonad maturation in other crab species (Kulkarni and Fingerman, 1992;Richardson et al, 1991;Sainath and Reddy, 2011). Moreover, serotonin could be involved in neurogenesis in proliferation zones of clusters 9 and 10 in the brain that are involved in reproduction in crustaceans (Beltz et al, 2011;Sandeman et al, 2009;Sullivan et al, 2007).…”

“…In females of several species of decapod crustaceans, including Macrobrachium rosenbergii, Penaeus monodon, Litopenaeus vannamei, 5-HT is known to induce ovarian maturation and spawning (Vaca and Alfaro, 2000;Wongprasert et al, 2006;Meeratana et al, 2006;Tinikul et al, 2009a,b;Sainath and Reddy, 2011). In male crustaceans, the administration of 5-HT increases testicular growth in M. rosenbergii , Penaeus stylirostris (AlfaroMontoya and Vega, 2011), and P. monodon (Klinbunga and Petkorn, 2012).…”

“…In contrast, when DA is injected into M. rosenbergii, ovarian maturation and embryonic development are delayed (Tinikul et al, 2009a,b). Moreover, administration of DA into eyestalk-ablated crabs shows a decrease in ovarian growth, probably through inhibition of the release of vitellogenin-stimulating hormone (VGH) from the brain and thoracic ganglia, a direct action of DA on ovaries, as well as mediation through the eyestalk hormones (Sainath and Reddy, 2011).…”

Induction of ecdysteroidogenesis, methyl farnesoate synthesis and expression of ecdysteroid receptor and retinoid X receptor in the hepatopancreas and ovary of the giant mud crab, Scylla serrata by melatonin

“…Crabs in groups 2 and 3 were euthanized and sampled on 28th day to evaluate the effect of melatonin. Experimental duration and melatonin dose regimen were selected based on our previous studies (Sainath and Reddy, 2011).…”

Crustacean Molting: Regulation and Effects of Environmental Toxicants

“…This supports the inhibitory role of serotonin on molting. But more recently Sainath and Reddy [55] stated that serotonin has no effect on molting in O. senex senex. Thus in depth and clarification studies are required in this direction.…”