Production of Longnose Catfish (Leiocassis longirostris) Fingerlings in Beijing Using the ASA 80:20 Pond Model and Soymeal-Based Feeds
Region: Northeast AsiaDownload
A feeding trial was conducted at the Xu Xing Zhuang Fish Culture Farm in Beijing to demonstrate fry to fingerling growth performance of longnose catfish (Leiocassis longirostris) using the ASA 80:20 pond production model and soymeal-based fry and fingerling feeds. Fish were stocked in three ponds of size 5.0-mu each at a density of 5,000 longnose catfish and 1,000 silver carp fry per mu. Catfish were fed a combination of soymeal-based 41/11 fry and 36/7 fingerling feeds. Longnose catfish grew from 0.8 g to an average weight of 45 g per fish in 110 days of feeding. Gross production averaged 186 kg/mu for longnose catfish and 70 kg/mu for silver carp. Average survival rates for longnose catfish and silver carp were 83% and 100%, respectively. Longnose catfish fed the combination of ASA soy-based feeds yielded an average FCR of 1.18:1. Average net economic return was RMB 1,921 per mu. Return on investment (ROI) averaged 33.6%. Longnose catfish exhibited good growth performance, FCR, survival and economic return in this trial, and are a promising pond culture species in feed-based production systems for the China freshwater aquaculture industry.