Abstract
The climbing perch (Anabas testudineus) is an economically valuable freshwater fish. Relatively slow growth has been a challenge in the domestication of this species in Indonesia. Nutrition, including feed lipid content, is one factor affecting growth. This study examined the effect of enriching feed with fish oil on the growth and survival of climbing perch (A. testudineus) fingerlings. The research was carried out at the Water Quality and Aquatic Biology Laboratory, Faculty of Animal Husbandry and Fisheries, Tadulako University, Palu, Central Sulawesi, Indonesia from 17 December to 18 January 2020. A completely randomized design (CRD) was used with 4 treatments and 5 replicates. The fish oil feed enrichment treatments were: A (control, 0%); B (1%); C (2%) and D (3%). Water quality remained within the optimum range throughout the research period. Over the month, climbing perch absolute weight gain ranged from 2.4±0.981 g (A) to 3.4 ± 0.836 g (D), while growth in length ranged from 0.404±0.092 cm (A) to 0.504±0.071 cm (D); however, the differences were not statistically significant (P0.05). The survival rate of climbing perch over the one month study period was 100% under all treatments, indicating that basic nutritional needs were met. Enrichment of a commercial feed with fish oil (Scott’s emulsion) at rates of 1-3% did not provide a significant benefit in terns of climbing perch fingerling growth.
Highlights
The climbing perch (Anabas testudineus) is an economically valuable fish that lives in swamps and rivers
This study examined the effect of enriching feed with fish oil on the growth and survival of climbing perch (A. testudineus) fingerlings
Over the month, climbing perch absolute weight gain ranged from 2.4±0.981 g (A) to 3.4 ± 0.836 g (D), while growth in length ranged from 0.404±0.092 cm (A) to 0.504±0.071 cm (D); the differences were not statistically significant (P>0.05)
Summary
The climbing perch (Anabas testudineus) is an economically valuable fish that lives in swamps and rivers. This fish is relatively expensive compared to introduced fisheries commodities such as carp, catfishes, tilapia and pacu. Wild climbing perch populations are increasingly under pressure from habitat degradation as well as fishing pressure (Ndobe et al, 2014 and 2019; Slamat et al, 2012). The domestication of this species has begun in several regions of Indonesia (Ahmad and Fauzi, 2010; Bijaksana and Balantek, 2012). Many factors can influence climbing perch growth and survival; these include stocking density (KhatuneJannat et al 2012; Uddin et al, 2016); feed
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