Influence of dietary lipid/protein ratio on survival, growth, body indices and digestive lipase activity in Snakehead (Channa striatus, Bloch 1793) fry reared in re-circulating water system

Abstract

Nine isoenergetic (18.5 kJ g−1) diets were formulated in a 3 × 3 factorial design to contain three protein levels (350, 400 and 450 g kg−1) for each of three lipid levels (65, 90 and 115 g kg−1), respectively, and fed twice daily for 8 weeks to fish of mean initial weight 3.34 ± 0.02 g reared in a re‐circulatory water system. Temperature, pH and dissolved oxygen (DO) were maintained within the range 28–30 °C, 5.6–6.8 and 4.82–6.65 mg L−1 respectively throughout. Results show that fish survival was better in the groups fed 65 g kg−1 lipid while growth performance (% weight gain, WG; specific growth rate, SGR) and nutrient utilization (feed conversion ratio, FCR; protein efficiency ratio, PER; protein intake, PI) in the 65/450 and 90/450 g kg−1 treatments were similar and significantly (P < 0.05) higher than in fish fed the other lipid/protein ratio combinations. The body indices monitored (Hepatosomatic index, HSI and viscerosomatic index, VSI) were similar among the treatments whereas intestinal lipase activity was not significantly (P < 0.05) affected by increase in dietary lipid and protein levels. Carcass composition showed that dietary protein level affected body protein content positively in the 65 and 90 g kg−1 lipid treatments, but dietary lipid level did not affect body lipid content. A lipid/protein ratio of 65/450 g kg−1 is considered adequate for good growth performance and survival of Channa striatus fry.

Effect of lipid levels on the reproductive performance of Snakehead murrel,Channa striatus

“…Regarding the effect of mentioned fatty acids and lipids on the reproductive performance of C. striatus broodstock, data have not been published till date. However, lipid requirement of C. striatus fingerling have been reported to be 90 g kg −1 (Aliyu‐Paiko, Hashim & Shu‐chien ). Since the aquaculture of this species depends on the wild‐bred fry and fingerling, understanding the nutrient requirements as well as breeding techniques of C. striatus broodstocks are vital to supply high quality seed (Hussain & Latifa ; Marimuthu & Arokiaraj ).…”

Feeding frequency influences the survival, growth and body lipid content of striped snakehead, Channa striatus (Bloch) fry

“…The measured protein and lipid content of the diets were 44.0% and 12.6% (dry matter), respectively, which are within the recommended ranges for C. striatus fry rearing (Aliyu‐Paiko et al . ).…”

“…In contrast, the aquaculture production of striped snakehead has risen from 5000 tonnes in 2000 to almost 15000 tonnes in 2012 (FAO ). It is expected that the growth of this industry will continue, particularly as research has been increasing in recent years regarding appropriate feeding management strategies (Qin & Fast ) as well as their dietary (Aliyu‐Paiko, Hashim & Shu‐Chien ; Aliyu‐Paiko & Hashim ) and culture requirements (Rahman, Arshad & Amin ).…”

Identification and characterization of virulent Aeromonas hydrophila Ah17 from infected Channa striata in river Cauvery and in vitro evaluation of shrimp chitosan

“…Channa striata, belonging to the family Channidae , also known as murrel or striped snakehead fish species which are native to South Asian and African countries (Ng, ). It is a commercially important freshwater fish species in India, Philippines, Thailand, Cambodia, and Vietnam and accounts for 13% among the marketable freshwater fish in India (Aliyu‐Paiko, Hashim, & Shu‐Chien, ). According to the international union for conservation (IUCN) Red list data, C. striata population has been declined rapidly and it is considered under the least concern category.…”