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- W2321792711 abstract "The stomach contents of several Trichomycteridae and Cetopsidae were examined from wet-season collections in the Portuguesa River basin, Venezuela. Collections were from piedmont, high llanos, and low llanos habitats. Based on these and other published and unpublished observations the species were classified according to feeding habits. Among the trichomycterids, Trichomycterus kneri and T. meridae feed only on benthic insects, Vandellia feeds only on blood of fishes and other vertebrates, and Stegophilinae (Stegophilus, Homod'iaetus, and Ochmacanthus) are tentatively classified as scale eaters. The only cetopsid species taken contained terrestrial-winged insects. Cetopsids are also schooling piscivores, but none are confirmed to be parasites. Both cetopsids and trichomycterids bear the common name candiru or carnero, but their feeding habits do not indicate close phylogenetic relationship. Three parasitic species were found in the piedmont and four in the high Ilanos, but in the low llanos. where the greatest variety of fishes was found, only Ochmacanthus occurred. OF THE 13 FAMILIES AND ESTIMATED OVER 2500 SPECIES of South American freshwater catfishes, only Trichomycteridae and Cetopsidae are reported to include parasitic species (Gudger 1930, Eigenmann and Allen 1942, Kelley and Atz 1964, Roberts 1972), knowni collectively as candiru, or carnero. The two families were once considered to be closely related primarily because of this similar reputation, but recent taxonomic work has shown that the Trichomycteridae are more closely related to the Loricariidae and Callichthyidae (the armored catfishes) rather than to the Cetopsidae (Baskin 1972, Chardon 1968). The older literature contains many references to the habits of the candiru, but the actual species in question is often obscure, and the exact feeding habits of these catfish families have not been determined by systematic stomach-content analysis. The Trichomycteridae consists of about 30 genera and 136 species, divided into six subfamilies (Baskin 1972). Most are small, worm-like catfishes, characterized as having teeth on the external edges of the opercular bones, and lacking the pectoral and dorsal fin spines found in more typical catfishes. The Trichomycterinae are not considered to be parasitic, and are not included among the candiru; e.g. Eigenmann and Allen (1942) report Trichomycterus dispar feeding on molluscs, crustaceans, and fishes. The Vandelliinae and Stegophilinae contain the reported" @default.
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- W2321792711 date "1980-09-01" @default.
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- W2321792711 title "Feeding of Reportedly Parasitic Catfishes (Trichomycteridae and Cetopsidae) in the Rio Portuguesa Basin, Venezuela" @default.
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- W2321792711 doi "https://doi.org/10.2307/2387969" @default.
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