OPTIMALISASI PADAT TEBAR BENIH UDANG PAMA (Penaeus semisulcatus) PADA PENTOKOLAN DENGAN SISTEM HAPA DI TAMBAK
Abstract
Udang pama mempunyai nilai ekonomis yang cukup tinggi baik di pasar domestik maupun di pasar dunia. Penelitian ini bertujuan untuk menentukan kepadatan benih yang sesuai pada pentokolan yang ditokolkan di tambak dengan menggunakan hapa. Riset ini dilaksanakan pada petakan tambak 250 m2 di Instalasi Riset Perikanan Air Payau Marana, menggunakan 9 unit hapa dari waring halus berukuran 1 m x 1 m x 1 m. Benih udang pama stadia PL-12 berukuran panjang rata rata 0,11 cm/ekor dengan bobot rata-rata 0,003 g/ekor ditebar dengan kepadatan berbeda sebagai perlakuan yaitu: (A) 1.000 ekor/m2, (B) 1.500 ekor/m2, dan (C) 2.000 ekor/m2 selama 35 hari. Untuk suplai oksigen digunakan 1 aerator Hiblow dengan 2 batu aerasi/hapa. Tinggi air dalam hapa 0,80 m dan pergantian air dilakukan setelah 15 hari pemeliharaan sebanyak 30% setiap 3 hari. Diberikan pakan komersil dalam bentuk crumble dengan dosis 50%—200% dari bobot biomassa. Hasil riset menunjukkan bahwa sintasan tertinggi pada kepadatan (A) 1.000 ekor/m2 (70,83%) berbeda nyata pada kepadatan (B) 1.500 ekor/m2 (47,71%), dan (C) 2.000 ekor/m2 dengan sintasan yang sangat rendah (34,58%). Pertumbuhan tidak menunjukkan perbedaan masing-masing sebesar: (A) 3,43; (B) 3,37; dan (C) 3,42 cm/ekor. Hal yang sama ditunjukkan pada pertumbuhan bobot masing-masing perlakuan yaitu: (A) 0,348; (B) 0,286; dan (C) 0,300 g/ekor.
ABSTRACT: Differences of stocking densities of green tiger shrimp fry (Penaeus semisulcatus) reared in nursery with net-cage system. By: Markus Mangampa, Sulaeman, Andi Parenrengi, and Samuel Lante
Green tiger shrimp is an economically valuable species both in domestic and international markets. The experiment was conducted at Marana Research Station in Maros Regency using nine of one-cubic-meter net-cages submerged in a 250 m2-pond. The aim of the experiment was to investigate the optimum stocking density of green tiger shrimp post larvae during nursery with net cage system in pond. PL-12 of green tiger shrimp fry with average individual length and body weight of 0.11 cm and 0.003 g respectively were stocked at different densities i.e. A= 1,000 ind./cage; B= 1,500 ind./cage; and C= 2,000 ind./cage. Each treatment was made in triplicate and reared for 35 days. Two aeration lines were used for each cage for oxygen supply using portable aerator. Water exchange was done 15 days after stocking date at a rate of 30% of water volume in pond everyday for three days. An average water depth in pond was maintained at 0.8 m. Crumbled commercial shrimp diet was applied daily at a rate of 50%—200% of body weight (BW). Result of the experiment showed that the highest survival rate (SR) was achieved by treatment A (70.83%) which was statistically different (P<0.05) to the treatment B (47.71%) and C (34.58%). Absolute length and weight growth rate were not significantly different on all treatments (P>0.05).
ABSTRACT: Differences of stocking densities of green tiger shrimp fry (Penaeus semisulcatus) reared in nursery with net-cage system. By: Markus Mangampa, Sulaeman, Andi Parenrengi, and Samuel Lante
Green tiger shrimp is an economically valuable species both in domestic and international markets. The experiment was conducted at Marana Research Station in Maros Regency using nine of one-cubic-meter net-cages submerged in a 250 m2-pond. The aim of the experiment was to investigate the optimum stocking density of green tiger shrimp post larvae during nursery with net cage system in pond. PL-12 of green tiger shrimp fry with average individual length and body weight of 0.11 cm and 0.003 g respectively were stocked at different densities i.e. A= 1,000 ind./cage; B= 1,500 ind./cage; and C= 2,000 ind./cage. Each treatment was made in triplicate and reared for 35 days. Two aeration lines were used for each cage for oxygen supply using portable aerator. Water exchange was done 15 days after stocking date at a rate of 30% of water volume in pond everyday for three days. An average water depth in pond was maintained at 0.8 m. Crumbled commercial shrimp diet was applied daily at a rate of 50%—200% of body weight (BW). Result of the experiment showed that the highest survival rate (SR) was achieved by treatment A (70.83%) which was statistically different (P<0.05) to the treatment B (47.71%) and C (34.58%). Absolute length and weight growth rate were not significantly different on all treatments (P>0.05).
Keywords
green tiger shrimp, nursery; stocking density; survival rate; growth rate
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PDFDOI: http://dx.doi.org/10.15578/jra.3.2.2008.175-181
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