Wyniki wyszukiwania

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New host, geographical records, and some ecological aspect of Absonifibula bychowskyi Lawler et Overstreet, 1976 [Monogenea: Diclidophoridae] from estuarine areas Argentina

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Martorelli S. R., Sardella N. H., Marcotegui P. S.

Acta Ichthyologica et Piscatoria

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2007

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tom 37

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nr 1

1-6

Background. Monogenean parasites from mixohaline areas of the South Atlantic coast of Argentina are very poorly reported. The aim of this paper is report a new host and locality for Absonifibula bychowskyi, a monogenean confined to fish living in estuarine areas. Some ecological considerations about the host-parasite relationship are also discussed. Materials and Methods. Parasites collected from whitemouth croaker, Micropogonias furnieri (Desmarest, 1823) (Actinopterygii: Sciaenidae), were studied from fixed- and live specimens, with standard procedures used in parasitology. Prevalence, mean intensity, and abundance of parasites were calculated and related to the host body size. Spearman′s rank correlation coefficient was calculated to determine possible correlations between host length, parasite intensity, and prevalence. Results. Absonifibula bychowskyi (Monogenea: Diclidophoridae) Lawler et Overstreet, 1976 is reported for the first time from the gills of whitemouth croaker, at the Samborombón Bay, a mixohaline area in the Buenos Aires Province, Southwest Atlantic Ocean. The parasite was found only in juveniles of M. furnieri that use the Samborombón Bay as the main estuarine nursery ground area. When the croaker migrated seawards, A. bychowskyi disappeared from the gills may be related to the increased salinity. Conclusion. This is the first record for Absonifibula bychowskyi in the Southwest Atlantic and M. furnieri. (It constitutes a new host record.) The presence of A. bychowskyi in M. furnieri could be indicative of the origin of the fish.

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Cucullanus marplatensis sp.nov. [Nematoda, Cucullanidae] parasitizing Odonthestes argentinensis [Valenciennes,1835] [Pisces, Atherinidae] from Argentinean waters

100%

Daniel V. I., Timi J. T., Sardella N. H.

Acta Parasitologica

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2002

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tom 47

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nr 1

A total ot 61 specimens of Odontesthes argentinensis (Valenciennes, 1835) from waters off Mar del Plata, Argentina (38°08'S 57°32'W) were examined for intestinal parasites. A new nematode species, Cucullanus marplatensis sp. nov. is described (prevalence 42.2%, mean intensity 6.17). The new species differs from its congeners from the Southwest Atlantic by the following characters: body size, spicules length, number and distribution pattern of caudal papillae and the position of the excretory pore and deirids. Additionally, voucher specimens of Cucullanus heterochrous Rudolphi, 1802 cited by Szidat (1961) from Urophycis brasiliensis from Puerto Quequén, Argentina (38°37'S 58°53'W) were also examined and described; their morphology and morphometry do not agree either with those of C. marplatensis sp. nov. or C. heterochrous described from other regions of the world. They could not be identified to species because of the poor preservation of specimens and, therefore, they are designated as Cucullanus sp.

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Parasitic nematodes of Engraulis anchoita Hubbs et Marini, 1935 [Pisces, Engraulidae] off the Argentine and Uruguayan coasts, South West Atlantic

100%

Timi J. T., Sardella N. H., Navone G. T.

Acta Parasitologica

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2001

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tom 46

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nr 3

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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

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2006

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tom 51

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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.

Ograniczanie wyników

3 Acta Parasitologica

1 Acta Ichthyologica et Piscatoria

4 Sardella N. H.

2 Timi J. T.

1 Alarcos A. J.

1 Daniel V. I.

1 Ivanov V. A.

1 Marcotegui P. S.

1 Martorelli S. R.

1 Navone G. T.

1 2007

1 2006

1 2002

1 2001

New host, geographical records, and some ecological aspect of Absonifibula bychowskyi Lawler et Overstreet, 1976 [Monogenea: Diclidophoridae] from estuarine areas Argentina

Cucullanus marplatensis sp.nov. [Nematoda, Cucullanidae] parasitizing Odonthestes argentinensis [Valenciennes,1835] [Pisces, Atherinidae] from Argentinean waters

Parasitic nematodes of Engraulis anchoita Hubbs et Marini, 1935 [Pisces, Engraulidae] off the Argentine and Uruguayan coasts, South West Atlantic

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