Publication Date:
2021-07-11
Description:
Penaeus indicus harvested after three months of rearing in brackishwater ponds and averaging 6.9 g for females and 5.6 g for males were stocked in two 12 cu m flowthrough ferrocement tanks at 240 females and 200 males per tank. The females were ablated on one eyestalk in one tank and remained unablated in the other tank; all males were unablated. Ablated females spawned up to 7 times per female; unablated females spawned up to only 3 times during the two month duration of the experiment. Ablated females produced a total number of 17.5 x 10〈sup〉6〈/sup〉 eggs, 6.6 x 10〈sup〉6〈/sup〉 nauplii, and an average of 23,480 eggs/spawning and 37.8% hatching rate from a total of 757 spawnings. Unablated females produced a total of 2.0 x 10〈sup〉6〈/sup〉 eggs, 1.1 x 10〈sup〉6〈/sup〉 nauplii, and an average of 26.990 eggs/spawning and 53.9% hatching rate from a total of 74 spawnings. Survival of ablated females was 53.5% compared to 69.4% for unablated females; males in both tanks averaged more than 90% survival.
Keywords:
Biology
;
Penaeus indicus
;
Philippines
;
brackishwater environment
;
Brackishwater aquaculture
;
Eggs
;
Eyestalk extirpation
;
Fecundity
;
Hatching
;
Organ removal
;
Pond culture
;
Sexual maturity
;
Shrimp culture
;
Spawning
;
Survival
Repository Name:
AquaDocs
Type:
article
Format:
application/pdf
Format:
application/pdf
Format:
14-17
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