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

100%

Alarcos A. J., Ivanov V. A., Sardella N. H.

Acta Parasitologica

2006

tom 51

nr 2

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

Erpocotyle Van Beneden et Hesse, 1863 [Monogenea, Hexabothriidae], parasite of carcharhiniform fishes from the Southwestern Atlantic Ocean, with the description of E.schmitti sp.n.

100%

Suriano D. M., Labriola J. B.

Acta Parasitologica

1998

tom 43

nr 1

Erpocotyle microstoma (Brooks, 1934) Yamaguti, 1963, parasite of Sphyrna (Platysqualus) tudes (Valenciennes, 1822), is redescribed. E. schmitti sp. n., parasite of Mustelus schmitti Springer, 1939, is described. The systematic position of E. tudes (= Neoerpocotyle tudes) Cordero, 1944 and E. platensis ( = N. platensis) Mañé Garzón et Holcman-Spector, 1968 is discussed, concluding that both species are synonyms of E. microstoma. According to the present study, the family Hexabothriidae Price, 1942, is represented in the Southwestern Atlantic Ocean by two genera: Callorhynchocotyle Suriano et Incorvaia, 1982 and Erpocotyle Van Beneden et Hesse, 1863, and by three species: C. marplatensis Suriano et Incorvaia, 1982, E. microstoma (Brooks) Yamaguti, 1963, and the herein proposed E. schmitti sp. n.

Ograniczanie wyników

2 Acta Parasitologica

1 Alarcos A. J.

1 Ivanov V. A.

1 Labriola J. B.

1 Sardella N. H.

1 Suriano D. M.

1 2006

1 1998

Wyniki wyszukiwania

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

Erpocotyle Van Beneden et Hesse, 1863 [Monogenea, Hexabothriidae], parasite of carcharhiniform fishes from the Southwestern Atlantic Ocean, with the description of E.schmitti sp.n.