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handle: 10261/41190
[EN] The digestive tracts of 1256 specimens of Symphurus nigrescens has been examined. Benthic invertebrates are found more frequently than any other group. Polychaeta, Ophiuroidea, Calocaris macandreae, mollusks and various crustaceans were the most common constituents of the diet. The proportion of C. macandreae in the digestive tracts increases with the length of the fish. There is a certain relationship between prey in the stomachs and the environment. [...] Hydrozoa sp., Eulima sp., Leda (Jupiteria) conmutata, Chlamys (Camptonectes) vitrea, Cuspidaria (Cardiomya) costellata, Aphroditidae, Nephthys sp., Hyalinoecia sp., Driglonereis sp., Lumbriconereis sp., Eunicidae, Capitellidae, Spionidae, Chaetophteridae, Ariciidae, Copepoda sp., Ostracoda sp., Cumacea, Dyastylis sp., Leucon sp., Isopoda, Munnopsidae, Ilyarachnidae, Cirolanidae, Amphipoda, Ampelisca sp. Monoculodes sp., Westwoodilla sp., Leucothoe llilljeborji, Lysianassidae, Oedicerosidae, Gammaroidea, Vibilia armata, Ptsica marina, Apseudes grossimanus, Apseudes sp., Amblyops sp., Pseudomma sp., Lophogaster typicus, Alpheus glaber, Processa sp., Natantia, Goneplaz rhomboides, Macropipus depurator, Brachiura, S. plagiusa, Symphurus strictus, Trigla lyra, Chimaera monstrosa [...]
[ES] Symphurus nigrescens es una especie muy común en nuestras costas encontrándose desde poca profundidad (20 m) hasta algo más de los 1000 m. Su mayor abundancia se sitúa, no obstante, a partir de los 100 m, disminuyendo ostensiblemente en profundidades superiores a los 500 m. Su biología es poco conocida y tan solo se posee alguna información sobre la freza que se sitúa entre los meses de junio y octubre. Su alimentación, así como la de otros Cinoglósidos, está estudiada a grandes rasgos (OCHIAI, 1964; DE GROOT, 1971, etc.) excepto un estudio sobre S. plagiusa que realizó STICKNEY (1976) en las costas de Georgia. El proposito de este trabajo es estudiar la dieta y las costumbres alimentarias de S. nigrescens que por su abundancia y hábitat tiene un gran interés para el conocimiento de la dinámica del ambiente bentónico donde vive. [...]
9 páginas, 2 tablas, 1 figura
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