TRAILS FOR FRY PRODUCTION OF THE BAGRUS BAYAD AT DIFFERENT WATER LEVELS IN EARTHEN PONDS 1ST RECORD

TRAILS FOR FRY PRODUCTION OF THE BAGRUS BAYAD AT DIFFERENT WATER LEVELS IN EARTHEN PONDS 1^ST RECORD

Adel M. Akar

Central Laboratory for Aquaculture Research, Agriculture Research Center, Ministry of Agriculture, Egypt

Received 21/ 2/ 2013 Accepted 26/ 3/ 2013

Abstract

Seed production of Bagrus bayad females brooders 3-4 years old having an average body length of 54.8± 0.5, 52.1± 0.6 and 54.2± 0.4 cm at three water level (75, 100 and 150 cm), respectively. Three groups of earthen ponds 1000 m² area were used representing three treatments (3 replicates, 15 female and 15 males each). The experiment lasted 90 days from March to May 2012. Fish were fed 6 days a week and water was renewed weekly. Water temperature ranged between 22 to 24 °C during the experimental run.

The results of seed production/pond, mean number of seed/ female and relative fecundity of the third group (depth 150 cm) were significantly higher (P<0.05) than of the first group, but the differences between first group and second group was no significantly. Contrary the Nested (diameter and depth) of the first group were significantly higher (P<0.05) than of the second group, but the differences between first group and third group was not significantly. There were no significant differences among average body weight and body length / fry.

Key words: Reproductive performances; Water levels and
Bagrus bayad