Social effects in growth experiments. Growth of jaguar guapote (Cichlasoma managuense) in isolation and in small groups. (ESP)
The growth rate and feed conversion of juveniles of the jaguar cichlid (Cichlasoma managuense) are compared at constant densities, in groups of 2, 5, 10 and 20 individuals per aquaria, and as isolated individuals. Density had a positive correlation with heterogeneous growth (coefficient of variation), with mortality and with mean and maximum growth rates. Feed conversion correlated negatively with density. Marked adaptation effects were observed during the first phases of the experiment. These effects were much stronger in individual fishes than in fish groups and appeared to be inversely correlated with density. After adaptation the growth rate of biggest fishes in the groups is still significantly greater than that of individual fishes. It is concluded that heterogeneous growth is not only due to growth depression of subordinate fishes but also to growth enhancement of dominant fishes.
Authors who publish with this journal agree to the following terms:
1. Authors guarantee the journal the right to be the first publication of the work as licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgment of the work's authorship and initial publication in this journal.
2. Authors can set separate additional agreements for non-exclusive distribution of the version of the work published in the journal (eg, place it in an institutional repository or publish it in a book), with an acknowledgment of its initial publication in this journal.
3. The authors have declared to hold all permissions to use the resources they provided in the paper (images, tables, among others) and assume full responsibility for damages to third parties.
4. The opinions expressed in the paper are the exclusive responsibility of the authors and do not necessarily represent the opinion of the editors or the Universidad Nacional.
Uniciencia Journal and all its productions are under Creative Commons Atribución-NoComercial-SinDerivadas 4.0 Unported.
There is neither fee for access nor Article Processing Charge (APC)
Comentarios (ver términos de uso)
Most read articles by the same author(s)
- Jorge Günther, Jorge Boza, Nazira Gálvez, Crecimiento de Colossoma macropomum en estanques de tierra en dependencia de la densidad. (ING) , Uniciencia: Vol 14 No 1 (1997)
- Jorge Günther, Jorge Boza, Crecimiento comparativo de las especies de robalo del pacifico costarricense cultivado en jaulas. , Uniciencia: Vol 15 No 1 (1998)
- Jorge Günther, Ricardo Jiménez, William Vargas, Efecto de la fitasa en el aprovechamiento del fósforo en dietas para tilapia (Oreochromis niloticus). Resultados preliminares (ING) , Uniciencia: Vol 18 No 1 (2001)