Main Article Content

Abstract

Institute for Mariculture Research and Fisheries Extension have been able to spawn yellowfin tuna in the floating nets cage (FNC) since 2015. However, the number of juveniles produced is still low due to the high mortality of larvae at the first ten days of rearing and when metamorphoses into juveniles. The inner wall color of tank is suspected to affect the survival of early larvae stage. The purpose of
the study is to get suitable inner wall color of the tank to increase growth and survival rate. Eggs were harvested from FNC and stocked 20 eggs/L in 5 pieces of Fiberglass Reinforced Plastic tanks, volume of 6 m3 each. Treatments were: A. Gray, B. Blue, C. Yellow, D. Black, and E. White, 3 replication. Hatching rate of eggs at treatment (A) was 60.39%, blue (B) 76.64%, yellow (C) 61.74%, black (D) 71.08% and white (E) 69.19%. Daily observation of Yellowfin tuna larvae kept in blue, yellow and white inner wall tanks patched in the corner near the surface of the tank. While the larvae in the gray and black inner wall tanks distributed evenly either in the surface layer and water column. The survival rate of juvenile in black inner wall tank is better than other color treatments, although statistically does not significantly different.

Keywords

Larvae, survival rate, yellowfin tuna, tank, inner wall color.

Article Details

Author Biographies

Jhon Harianto Hutapea, Indonesia

Institute for Mariculture Research and Fisheries Extension

Gunawan Gunawan, Indonesia

Institute for Mariculture Research and Fisheries Extension

Ananto Setiadi, Indonesia

Institute for Mariculture Research and Fisheries Extension

Bedjo Slamet, Indonesia

Institute for Mariculture Research and Fisheries Extension

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