Total replacement of fishmeal by soybean, rapeseed and lupine meals in Chilean southern river crayfish juveniles, Samastacus spinifrons.

• DOI: 10.22533/at.ed.17422111010

• Palavras-chave: ---

• Keywords: S. spinifrons, fishmeal, soybean, raps, lupin, replacement

• Abstract:

  One of the concerns for maintaining the growth rate of aquaculture is the availability of inputs for the preparation of feed. As is well known, the most commonly used ingredient is fishmeal, an input which in the near future will no longer be sufficient for maintaining this growth rate. In this context, a proposal was made to establish the effects caused by a total replacement of fishmeal with vegetable ingredients such as soybean, rapeseed and lupin meals on the growth and survival rates of Chilean southern river crayfish juveniles, Samastacus spinifrons. To this end, 12 tanks (length 0.4 m; width 0.23 m; height 0.17 m) were prepared with customised PVC and mosquito net structures. The water flow rate was 0.132 L min-1. 20 juveniles were allocated to each tank, and isoproteic feed (30%) was administered once a day. After 100 days, no significant differences were found in the growth parameters between the fish meal-based diet and the diets made from soybean, rapeseed and lupin meal. In terms of survival rates, rapeseed and lupin significantly out-performed soybean and fishmeal. No difference was observed between the latter two.

• Número de páginas: 36