The Use of Different Diets for Feeding Rate and Growth of Shortfin Eel (Anguilla bicolor bicolor)

N Taufiq-Spj,D H Ismunarti,A Wirasatria,I Pratikto,S Sunaryo,M I Syaputra

doi:10.1088/1755-1315/116/1/012020

N Taufiq-Spj, D H Ismunarti + Show 4 more

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https://doi.org/10.1088/1755-1315/116/1/012020

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Abstract

Growth and feed rate accompanied with proximate, texture and condition of the organism. The objective of this study was to obtain the effect of different diets to the feed rate and growth of shortfin eel Anguilla bicolor bicolor. The study used three replications and 3 treatments of different sources of feed diet during 84 days culture. The fish were fed with proximation of 2.2% wet basis d-1 (ratio of dry feed and water = 4 : 3). Initial density of approx. 15 kg seed stock of eel fingerling size (early elver) per m3 water in the recirculating water system with ranging of means±SD of temperatures, pH and DO were 27.14±0.11 to 27.66±0.05 °C, 7.44±0.09 to 7.66±0.05, and 3.54±0.19 to 4.66±0.09 ppm respectively. The result shows that feeding rate has relation to lipid content of feed but not significantly different among treatments (α > 0.05), the highest FR shows by F2 followed by F3 and F1, where: F1 = 2.04±0.07% d-1 and F2 = 2.12±0.05% d-1 and F3 = 2.10±0.06% d-1). Absolute growth of individuals and biomass were related to the protein content; the highest was F1 followed by F2 and F3. Growth margin F1, F2 and F3 of individual were 25 g (46%), 22 g (44%), and 15 g (27%) respectively, whilst biomass margin were 3,855 g (26%), 3,629 g (24%), and 2,834 g (18%) respectively during 70 days culture. Marginal mean of Individual-specific growth rate (SGRi) shows no significantly different (α > 0.05) between F1 (0.53±0.05% d-1) and F2 (0.52±0.01% d-1), but both of F1 and F2 have significantly different (α < 0.05) to F3 (0.35±0.07% d-1). Biomass-specific growth rate (SGRb) also shows no significantly different (α > 0.05) between F1 (0.33±0.09% d-1) and F2 (0.31±0.02% d-1), but both of F1 and F2 have significantly different (α < 0.05) to F3 (0.24±0.08% d-1).

Highlights

Anguilla sp. is mainly as carnivorous species [5] [12] [15] [16] with shorter gut line compare to either omni and herbivorous species
Result and Discussion As a carnivorous species, i.e. Anguilla bicolor bicolor grow related to the protein content in feed given, the growth apparently increases by increasing protein
This study shows that fish A. bicolor bicolor have a fluctuation of growth, but remain increase above zero line (Figure 1 and 2) even the Feeding Rate (FR) remain stable (Table 2)

Summary

Introduction

Anguilla sp. is mainly as carnivorous species [5] [12] [15] [16] with shorter gut line compare to either omni and herbivorous species. Anguilla preys mainly pelagic swimmer or drifting organism and some of the benthic organism. Published under licence by IOP Publishing Ltd used for baiting American eel A. rostrata at Hudson River [15]. Larvae, Asellus sp., Nymphs Ephemeroptera, Gammarus pulex, and Diptera larvae.While eels more than 300 mm in length fed on Gammarus, Asellus, crayfish, and fish of Sculpin and Stickleback. Eels become increasingly piscivorous by increasing body length. Due to this feeding habit, the sources of feed are important in racing this species

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