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Effect of dietary Y ucca schidigera extract on growth, total ammonia–nitrogen excretion and haematological parameters of juvenile striped catfish P angasianodon hypophthalmus
Author(s) -
Güroy Betül,
Mantoğlu Serhan,
Kayalı Selin,
Şahin İzzet
Publication year - 2014
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/are.12001
Subject(s) - catfish , biology , zoology , yucca , excretion , feed conversion ratio , clarias gariepinus , protein efficiency ratio , composition (language) , fish <actinopterygii> , fishery , body weight , ecology , biochemistry , endocrinology , linguistics , philosophy
A feeding trial with striped catfish, P angasianodon hypophthalmus was performed to determine the effect of Y ucca schidigera in practical diet on the growth, feed utilization, body composition, total ammonia–nitrogen ( TAN ) excretion and haematological parameters. A diet with fish meal as the main protein source without yucca extract was used as the control diet (Diet 1). Four diets were formulated with 0.075 (Diet 2), 0.1 (Diet 3) and 0.15 (Diet 4)% of yucca extract respectively. Fifteen fish per tank (initial mean weight 1.78 ± 0.05 g) were randomly allocated to 15 fibreglass tanks (80‐L) connected to a freshwater closed recirculation system (temperature 29.7 ± 1.0°C). The experimental diets were tested in triplicates for 12 weeks. The specific growth rate of fish fed Diet 4 was significantly higher when compared with fish fed Diet 1. The growth of fish fed diets Diet 2 and Diet 3 were not significantly different compared with fish fed the Diet 1. Striped catfish fed Diet 4 had significantly lower feed conversion ratio compared with fish fed Diet 1 and Diet 2 ( P < 0.05).The incorporation of high level Y ucca schidigera extract in the diets reduced TAN compared with Diet 1. Dietary inclusion of Yucca extract levels did not significantly affect the biometric parameters or whole body proximate composition of the striped catfish ( P > 0.05). The PCV (%) in fish significantly increased with high levels of Yucca inclusion (Diet 4) compared with control diet. Fish fed Diet 4 showed significantly higher haemoglobin levels than Diet 1 ( P < 0.05). The results indicate that dietary inclusion of Y ucca schidigera extract is promising as a feed additive that could improve growth performance and some haematological parameters and the best Y ucca schidigera level was 0.15%.