Development of the artificial diet for Kikuchi minnow, Aphyocypris kikuchii
Date Issued
2011
Date
2011
Author(s)
Liu, Shun-Hao
Abstract
The Kikuchi minnow (Aphyocypris kikuchii), is a small native freshwater fish that used to be found in streams, ponds and lakes of eastern Taiwan. They often swim in school between aquatic plants and boulders in the water, where they forage for small insects or benthic algae. It prefers the habitats with slow water flow that is rich in aquatic plants for cover. In recent years, due to environmental deterioration that is caused by destruction of habitats and water pollution, their population distribution in the wild has been greatly affected. Development of artificial diet will not only provide the material for the aquaculture but also for the conservation of A. kikuchii. Two experiments were conducted to study the optimum dietary protein level, and the growth performance in low fish meal diets.
Experiment I：Five diets contain five protein levels ranging from 25％ to 40％, and carbohydrate levels ranging from 35％ to 55％, were fed to triplicate groups of Kikuchi minnow (initial body weight 0.20 ± 0.03 g fish-1) for 6 weeks. The highest weight gain (WG) and feed efficiency (FCR) were recorded in fish fed Diet S4D0, which contained 40％ soybean meal (SBM). According to the results, utilization of protein is better than carbohydrate on Kikuchi minnow.
Experiment II：Four isonitrogenous (crude protein 38％) and isolipid (crude lipid 8％) were formulated to feed Kikuchi minnow (initial body weight 0.39 ± 0.05 g fish-1) for 6 weeks. Diet FM30 (control) contains the highest percentage of fish meal (FM), up to 30％. In the other three diets (FM25, FM15 and FM0), FM protein was replaced by SBM and corn protein (CP) as alternative plant protein resources. The highest WG and FCR were recorded in fish fed diet FM25, which contained 55％ plant protein. Results were showed that Kikuchi minnow also has good utilization of different plant protein supplements.
Subjects
Kikuchi minnow
protein
carbohydrate
low fish meal diet
SDGs
Type
thesis
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