Jatropha platyphylla kernel meal as feed ingredient for Nile tilapia (Oreochromis niloticus L.): growth, nutrient utilization and blood parameters

摘要: Summary Jatropha platyphylla is a multipurpose and drought-resistant shrub, available in Mexico, locally known as ‘sangregrado’ belonging to the family Euphorbiaceae. Its seeds are rich oil protein do not contain main toxin, phorbol esters present other Jatropha species. kernel meal (JPKM) obtained after extraction contained 70–75% crude (CP); however, it phytate, lectin trypsin-inhibitor. The levels of essential amino acids (except lysine) were higher JPKM than soybean (SBM). Using Nile tilapia (Oreochromis niloticus) fingerlings 12-week experiment was conducted evaluate nutritional quality heated compare with that SBM fishmeal. Fingerlings (15 fish; average weight 13.7 ± 0.21 g) randomly distributed three treatment groups five replicates. Fish fed isonitrogenous diets (CP 36%): control diet containing fishmeal-based two replacing 62.5% fishmeal (Jatropha group) (Soybean group). growth performance, feed conversion ratio, efficiency productive energy retention did differ significantly among groups. A lower apparent lipid observed plant protein-fed group group. RBC count, haematocrit blood glucose contents plant-protein Other haematological parameters (WBC haemoglobin, mean cell volume: calcium sodium ions, total bilirubin urea–nitrogen blood) metabolic enzymes (alkaline phosphatase alanine transaminase) activities results from study established promising good source for feed.