Growth, feeding and reproduction of the catfish Eremophilus mutisii (Pisces: Trichomycteridae), from artificial reservoirs in Colombia
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| Autoři: | , , |
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| Médium: | artículo original |
| Stav: | Versión publicada |
| Datum vydání: | 2006 |
| Popis: | The catfish, Eremophilus mutisii, was cultured under different densities in artificial rainfall reservoirsat Caldas, Boyacá, Colombia. At capture, the average total length of the animals was 10 cm and the weightranged between 9 and 10 g. These fish were in initial stages of sexual development. After a year in the reservoirs,they had increased in length and weight as follows (densities in parentheses): 5.22 cm and 27.23 g (0.5individuals/m2)); 1.98 cm and 8.79 g (1 individual/m2), and 2.45 cm and 0.82 g (2 individuals/m2). They were atthe early stages of sexual maturity, and their condition factor fluctuated between 0.61 and 0.96. They preferablyingested insect larvae that were found in benthic and littoral communities of the reservoirs. The benthos wasdominated by ephippia of Daphnia, lumbriculids, and chironomid larvae. The biomass of benthic organismsranged between 0.1126 and 1.3847 g/m2. In the littoral community aquatic insects were the most importantcomponent, especially the hemipterans. The biomass of the littoral fauna ranged between 0.14 and 4.05 g/m2. |
| Země: | Portal de Revistas UCR |
| Instituce: | Universidad de Costa Rica |
| Repositorio: | Portal de Revistas UCR |
| Jazyk: | Español |
| OAI Identifier: | oai:portal.ucr.ac.cr:article/13925 |
| On-line přístup: | https://revistas.ucr.ac.cr/index.php/rbt/article/view/13925 |
| Klíčové slovo: | Eremophilus mutisii Trichomycteridae growth observations gut content Colombia |