Home
  >  
Section 6
  >  
Chapter 5,859

Maturation and growth of ablated and unablated penaeus monodon

Emmerson, W.D.

Aquaculture 32(3-4): 235-242

1983


ISSN/ISBN: 0044-8486
DOI: 10.1016/0044-8486(83)90221-1
Accession: 005858682

Both single eyestalk ablated and unablated P. monodon have been induced to spawn domestically under reduced light conditions. Ablated females developed their ovaries almost immediately while unablated females took 1-2.2 mo. or 2 or 3 molt cycles to develop and often never beyond ovarian stage 3. Ablated females spawned up to 4 times per molt cycle and unablated up to 3 times. Most of the spawns were 1st ones in the molt cycle from 36.4% for ablated females to 67% for the unablated ones. The average molt-cycle duration for unablated spawners (28 days) was slightly longer than for ablated females (26 days) but this was not statistically different. Molt-cycle duration increased with increasing female mass although correlation was poor (r = 0.38). Generally females smaller than 120 g gained mass, while females larger than 120 g lost mass. Suggestions to improve mass loss are given. A 1:1 male:female ratio did not appear to be adequate (unviable ova) so that this ratio could be increased or the male tank method of Beard and Wickins (1980) could be employed.

PDF emailed within 0-6 h: $19.90