Growth, feeding and reproduction of the catfish Eremophilus mutisii (Pisces: Trichomycteridae), from artificial reservoirs in Colombia

The catfish, Eremophilus mutisii, was cultured under different densities in artificial rainfall reservoirs at Caldas, Boyacá, Colombia. At capture, the average total length of the animals was 10 cm and the weight ranged between 9 and 10 g. These fish were in initial stages of sexual development. Aft...

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Bibliographic Details
Published inRevista de biología tropical Vol. 54; no. 2; pp. 589 - 597
Main Authors Pinilla, Gabriel, Abril, Maritza, González, Esperanza
Format Journal Article
LanguageEnglish
Spanish
Portuguese
Published Costa Rica Universidad de Costa Rica 01.06.2006
Subjects
Animals
Biodiversity Conservation
Biology
Biología
Biomass
Body Weight
Catfishes - anatomy & histology
Catfishes - growth & development
Catfishes - physiology
Colombia
Eremophilus mutisii
Feeding Behavior - physiology
Female
Fisheries
Fresh Water
Freshwater
growth observations
gut content
Hydrogen-Ion Concentration
Life Cycle Stages
Male
Population Density
Population Dynamics
Reproduction
Seasons
Trichomycteridae
Water Pollutants, Chemical
Colombia
growth observations
Trichomycteridae
Colombia
gut content
Eremophilus mutisii
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Summary:The catfish, Eremophilus mutisii, was cultured under different densities in artificial rainfall reservoirs at Caldas, Boyacá, Colombia. At capture, the average total length of the animals was 10 cm and the weight ranged 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 (0.5 individuals/m2); 1.98 cm and 8.79 g (1 individual/m2), and 2.45 cm and 0.82 g (2 individuals/m2). They were at the early stages of sexual maturity, and their condition factor fluctuated between 0.61 and 0.96. They preferably ingested insect larvae that were found in benthic and littoral communities of the reservoirs. The benthos was dominated by ephippia of Daphnia, lumbriculids, and chironomid larvae. The biomass of benthic organisms ranged between 0.1126 and 1.3847 g/m2. In the littoral community aquatic insects were the most important component, especially the hemipterans. The biomass of the littoral fauna ranged between 0.14 and 4.05 g/m2.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-3
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ObjectType-Statistics/Data Report-1
ISSN:0034-7744
2215-2075
DOI:10.15517/rbt.v54i2.13925