A systematic literature review of the major factors causing yield gap by affecting growth, feed conversion ratio and survival in Nile tilapia (Oreochromis niloticus)

Productivity among small‐ and medium‐scale tilapia farms varies considerably. The difference between the best performers and lower ones (yield gap), is affected by differences in growth rate and feed conversion ratio (FCR). FCR at the farm level is strongly influenced by survival of fish. In this study a systematic literature review of two databases (ASFA and CAB‐Abstracts) identified 1973 potentially relevant articles.

Agonistic behaviour and feed efficiency in juvenile Nile tilapia Oreochromis niloticus

The main hypothesis of the present study was that an aggressive and dominant fish would eat more feed and would be more efficient. To test this hypothesis, estimations of the relationships between agonistic behaviour, growth and feed efficiency in Nile tilapia were calculated to attempt a clearer understanding of their effects on each other, and whether Nile tilapia displaying particular behaviours could be identified as growing faster, and if so whether they did so more efficiently or not.

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