Resources

Description

World aquaculture production is dominated by omnivorous fish species that live in freshwater, including various carp and catfish species. Soybean meal is a prominent ingredient used in prepared diets for these species, often constituting 50 to 60% of the total formulation. Such levels of incorporation are possible due to adequate palatability of soybean meal and its excellent nutritional value for these species, including high levels of crude protein, complementary amino acid profile and relatively high nutrient digestibility. For many omnivorous freshwater species cultured throughout the world, soybean meal has largely replaced more costly protein feedstuffs in diet formulations, such as fish meal, while maintaining optimal fish production. As a result, the cost of fish production has been reduced substantially. While aquacultural production continues to expand worldwide to meet the growing demand for seafood, the use of soybean products will play an even more important role in providing high-quality protein for various fish species.

Language
English

Author
Delbert M. Gatlin III
Description

A two-stage feeding trial was conducted near Haikou, Hainan Province, to evaluate fry to market growth performance of pangasius catfish using the ASA 80:20 pond production model and ASA soymeal-based feeds. In the first stage, juvenile fish were stocked in three, 2.5-mu (0.17-ha) ponds at a density of 3,000 pangasius catfish and 1,000 silver carp per mu (45,000 catfish and 15,000 silver carp per hectare). Pangasius catfish grew from 0.1 g to an average weight of 190 g per fish in 103 days of feeding, with an average FCR of 1.10:1. At fish size 190 g, the fish wererestocked at 700 pangasius catfish and 100 silver carp fingerlings per mu (10,500 catfish and 1,500 silver carp per hectare). Pangasius catfish grew from 190 g to an average weight of 880 g in 78 days, with an average FCR of 1.17:1. Total production time from fry (0.1-g) to market size (880 g) was 181 days. Pangasius catfish demonstrated excellent growth performance and feed conversion efficiency with the ASA soymeal-based feeds and 80:20 production technology throughout the production cycle. Harvested pangasius catfish were uniform in size with good body color and conformation.

Language
English

Date Published
October 30, 2003

Author
Michael C. Cremer, Zhang Jian and Zhou Enhua
Description

A feeding trial was conducted near Haikou, Hainan Province, to demonstrate fingerling to market growth performance of pangasius catfish using the ASA 80:20 pond production model and the ASA soymeal-based, all-plant protein growout feed. Fish were stocked in two, 2.5-mu ponds and one 2.0-mu pond at a density of 735 catfish and 100 silver carp per mu. Pangasius catfish grew from 150 g to an average weight of 659 g per fish in 74 days of feeding. Gross production of pangasius averaged 485 kg/mu. Survival of pangasius was 100%. FCR for pangasius with the soy-based feed averaged 1.17:1. Average net economic return was RMB 5,013 per mu at a market price of RMB 25/kg for pangasius catfish. Average return on investment (ROI) was 71%. Pangasius catfish demonstrated excellent growth performance and feed conversion efficiency with the ASA soymeal-based feed and 80:20 production technology in this trial. Pangasius produced in the trial were uniform in size with good body color and conformation.

Language
English

Date Published
October 30, 2002

Author
Michael C. Cremer, Zhang Jian and Zhou Enhua
Description

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.

Language
English

Date Published
October 31, 2001

Author
Michael C. Cremer, Zhang Jian and Zhou Enhua