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The parasites of the gray mullet mugil cephalus l. in chile systematics and population features perciformes mugilidae



The parasites of the gray mullet mugil cephalus l. in chile systematics and population features perciformes mugilidae



Gayana Zoologia 51(1-4): 3-58



The parasites of Mugil cephalus L. from three localities along the Chilean coast (Arica, Coquimbo, Concepcion) were studied qualitatively and quantitatively. The parasites found are: PROTOZOA: Kudoa sp.; Myxobolus sp.; Trichodina sp.; MONOGENEA: Ligophorus huitrempe n. sp.; Metamicrocotyla macracantha (Alexander); Microcotyle pseudomugilis Hargis: DIGENEA Dicrogaster fastigatus Thatcher and Sparks; D. fragilis n. sp.; Himenocotta manteri Overstreet; Lasiotocus sp.; Phagicola longa (Ramsom) (metacercaria; adult stages were obtained through experimental infections of Mus musculus); Saccocoelioides overstreeti n. sp.; S. papernai n. sp.; CESTODA: Scolex pleuronectis Mueller; NEMATODA: Contracaecum multipapillatum (Von Drasche) (larva); Phocanema sp. (larva); COPEPODA: Bomolochus chalguanus n. sp.; Ergasilus lizae Kroyer; E. versicolor Wilson; Naobranchia lizae (Kroyer). Fishes from Concepcion were all parasited by at least one parasite species. All parasites were distributed in all fish size groups and are highly overdispersed (S2/X > 1), showing a clumpted and not a random distribution. All the parasites load (except D. fragilis) is positively correlated with fish length (P < 0.01 y P < 0.01). A positive association between L. huitrempe n. sp. and M. pseudomugilis (P < 0.001) was detected. No more coupled parasites shown any association. The geographic distribution of Mugil cephalus parasites show no continuity along the Chilean coast neither with other geographic region were they are present. These differences are attributed to the abiotic conditions along the chilean coast (temperature gradient and absence of estuarine areas in the north, for example) which could be conditioning the presence of intermediate and/or definitive hosts as well as the supervivence of parasites different development stages (specially in the ectoparasites).

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