Journal of the Marine Biological Association of India

Volume 29 Issue 1&2

Cage rearing of early juveniles of white prawn Penaeus indicus (H. Milne Edwards) for stocking in grow out net pens.


The shrimps were grown in net pens at Killai from 1982. The pens were enclosed by using nylon webbing (14 mm and 10 mm stretched mesh size) at Killai. The shrimp larvae had to be grown to stockable size (1.7 to 3.0 g) to avoid escape through the mesh. The velon cages (16 p mesh HDPE) of 10 X 4 X 1.5 m and 10 X 3 X 1.5 m size were used for rearing shrimp larvae to juvenile size. The Penaeus indicus seeds were available it; plenty in Killai Backwaters during Jure-August and December-February every year. These seeds were collected by push net and stocked in cages for rearing. The seeds were stocked at different stocking densities (1.125, 1.0, 0.83 and 0.25 million/ha) and better survival was recorded at 1.0 million/ha. stocking density. Three types of feed were given (1) Shrimp head, Boiled rice bran. Groundnut cake and squid pellet, (2) Shrimp head, squid pellet, crab, squilla and groundnut cake and (3) Boiled squid offal only. Among these three feed compositions, the boiled squid offal gave better conversion (3.85) at 1.0 millon stocking density by feeding the seeds at 100%, initial body weight. Very high feeding rate (200%, 175%, 250% initial body weight) gave poor survival and low conversion. The second type feed was given at 70 % initial body weight, which took longer period for growing to stockable size. The boiled squid offal was given at 300% initial body weight in one cage with low stocking density (0.25million/ha.) gave better survival in short period, but low conversion.

Date : 31-12-1987