Morphometric analysis and body indexes of the catfish (Eremophilus mutisii)
With the aim of characterizing the morphometry and body indexes of Eremophilus mutisii,thirty-three fishes (27 females and 6 males) coming from the Bogotá river, specifically of theSuesca region, were used. The aspect ratio of the caudal fin was determined with the aid of theimage analysis software ImageJ®. Gonadosomatic and hepatosomatic indexes and carcass yieldwere determined for each fish. Correlation, regression and multivariate (canonical discriminantanalysis) techniques were used for data analysis. Results indicated that sex does not affect thebody shape of the fishes. The relationship between length and weight was fitted for each sex.The average aspect ratio of the caudal fin was 1.57, which suggests that the species has sedentary habits or slow swimming. The gonadosomatic index of the maturing females (mean: 14.43 %; range: 8.84 % to 23.22 %) increased as a function of body weight and was greater than in males (mean: 5.32 %; range: 2.31 % to 8.29 %). Therefore, the carcass yield was lower in maturing females than in males. The mean of the hepatosomatic index for females was 0.86 % (range: 0.43 % to 1.88 %) and for males was 0.63 % (range: 0.39 % to 1.09 %). As a conclusion, Eremophilus mutisii is a sedentary fish species, and females exhibit greater gonadosomatic index and lower carcass yield than males.
| Main Authors: | , , , , |
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| Format: | Digital revista |
| Language: | spa |
| Published: |
Universidad Nacional de Colombia - Sede Bogotá - Facultad de Medicina Veterinaria y de Zootecnia
2019
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| Online Access: | https://revistas.unal.edu.co/index.php/remevez/article/view/82433 |
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