Distribution patterns and interactions of cestodes in the spiral intestine of the narrownose smooth-hound shark, Mustelus schmitti Springer, 1939 (Chondrichthyes, Carcharhiniformes)

摘要: The distribution patterns and the cestode species interactions within spiral intestine of 20 specimens Mustelus schmitti from coastal waters off Mar del Plata, Argentina were studied. Six found: Tetraphyllideans Calliobothrium barbarae, C. australis, lunae Orygmatobothrium schmittii, diphyllidean Echinobothrium notoguidoi trypanorhynch Eutetrarhynchus vooremi. most common number parasite per host was 3. Brillouin’s diversity index ranged 0.1 to 1.2 Berger-Parker dominance indicated that barbarae dominant species, followed by O. schmittii australis. australis presented a broad along intestine, whereas lunae, E. vooremi showed more restricted niche breadth. In general, Renkonen’s no evidence overlap in range different species. infracommunities, intraspecific aggregation stronger than interspecific aggregation, indicating competition may play little role. concurs with predictions attachment sites for made previous authors.