The male reproductive system of Hippolyte inermis Leach 1815 (Decapoda, Caridea)

Abstract

The present work completes a series of studies on the biology of the shrimp Hippolyte inermis Leach 1815, where we suggested the species to be gonochoristic. The morphology of the male reproductive system (testes, vasa deferentia, gonopores) and the different stages of male germ cell development are described for the first time in the genus Hippolyte, using TEM, SEM, and histological methods. All males from 1.70 to 3.42 mm in carapace length had active testes and well-developed vasa deferentia. No case of sex reversal could be found.

New insights in the male anatomy, spermatophore formation, and sperm structure in Atyidae: The red cherry shrimp Neocaridina davidi

“…The SL at the level of the DVD develops into a complete and thicker protein envelope (consisting mainly of proteins with basic side chains). Similar results have been reported for other two caridean species, H. inermis and H. niezabitowskii (Cobos et al, 2010;Manjón-Cabeza, Cobos, & Raso, 2011), in which protein components completely surround spermatozoa and the surrounding matrix in the final section of the distal VD.…”

“…The spermatophore in caridean shrimps was well described in Heptacarpus pictus (Bauer, 1976), Macrobrachium rosenbergii, Macrobrachium nipponense, Macrobrachium formosense, Macrobrachium japonicum, Macrobrachium latidactylus, Palaemon paucidens (Chow, Ogasawara, & Taki, 1982;Chow, Taki, & Ogasawara, 1989), Macrobrachium australiense (Butcher & Fielder, 1994), and Hippolyte inermis (Cobos, Díaz, Raso, & Manjón-Cabeza, 2010). Based on those studies, the spermatophore in Caridea is a relatively simple structure that consists of a sperm mass surrounded by two secretions: the inner secretion is basophilic, with a spermatozoal protective function, while the outer secretion is eosinophilic, with an adhesive function that sticks the spermatophore to the sternum of the female (Bauer, 2004;Subramoniam, 1993).…”

Morphology of the male reproductive system of freshwater prawn Macrobrachium carcinus (Decapoda, Caridea): Functional and comparative aspects

“…Our study defined three regions within the vas deferens based on anatomical and histological observations. As we observed in M. carcinus , and as has been observed in other prawn species such as M. rosenbergii (Chow et al, ), M. dayanum (Tripathi & Pandey, ), M. australiense (Butcher & Fielder, ), and Hyppolyte inermis (Cobos, Díaz, Raso, & Manjón‐Cabeza, ), as well as in crab species such as Portunus pelagicus (Ravi et al, ), Callinectes sapidus (Cronin, ), Ranina ranina (Minagawa et al, ), and Maja brachydactyla (Simeó et al, ), the proximal region of the vas deferens is composed of a highly coiled tube. The high columnar epithelium in the PVD‐MVD segment associated with the adhesive substance of spermatophores is a common feature in Macrobrachium species, which has already been observed in M. rosenbergii (Chow et al, ).…”

A novel spermatozoan ultrastructure in the shrimpHippolyte obliquimanusDana, 1852 (Decapoda: Caridea: Hippolytidae)

“…In order to confirm these hypotheses, it is necessary to analyze the sperm cell ultrastructure of these species (H. inermis and H. niezabitowskii) and other Hippolyte species. The works of Cobos et al (2011) andManjo´n-Cabeza et al (2011) confirm the presence of a single anterior acrosomal spike in this genus.…”