Oviducal gland microstructure of Raja miraletus and Dipturus oxyrinchus (Elasmobranchii, Rajidae)

摘要: We studied the morphology and histology of oviducal gland (OG) in brown ray (Raja miraletus) long-nosed skate (Dipturus oxyrinchus) to understand its functional role reproductive strategy these species. The external was similar both species, with lateral extensions like those found other members Rajidae. Microscopic analysis showed a internal organization Immature developing glands did not react histochemical techniques. On reaching maturity, OG had largest width due an increase production secretory materials. In club zone strong reaction Periodic acid-Schiff (PAS) alcian blue (AB) stains, indicating neutral sulfated acid mucins. material produced by papillary varied greatly between two Both displayed tubular observed zone, but D. oxyrinchus region near lumen intensely PAS+, whereas last row tubules stained for mixture baffle most conspicuous extensive segment all OGs, it PAS/AB. terminal which is responsible hair filaments, differed species terms composition serous mucous glands. This difference probably related different substrates they release egg capsules. Individual sperm detected lamellae could be result recent mating, their presence deep recesses might indicate storage.