Journal of the Marine Biological Association of India

Morphological variations in the Pacific white shrimp, Litopenaeus vannamei (Boone, 1931), reared in two different culture ponds

Volume 65 Issue 2

S. D. Prajapati and N. C. Ujjania

10.6024/jmbai.2023.65.2.2375-13

Abstract

The shrimp (Litopenaeus vannamei) shows differences in morphometric variables due to genetic and environmental factors during phenotypic development. For the proposed study the morphological variables were measured from shrimp (L. vannamei) specimens which were randomly collected from two different types of ponds: earthen and polyethylene-lined ponds (500 each). The morphometric variables show proportional growth with the increasing total length of the shrimp. The range of correlation coefficient (r) was 0.171-0.881 in an earthen pond and 0.107-0.906 in a polyethylene-lined pond respectively which shows that morphometric parameters are linearly and positively related to the actual total length of shrimp. The growth coefficient (b) was maximum (2.504 and 2.997) for the actual total length and weight in earthen and polyethylene lined ponds respectively while it was minimum of 0.723 for the actual total length and carapace width in the earthen pond and 0.619 for actual total length and third segment length of shrimp in polyethylene lined pond. The growth coefficient (b) was determined <3.0 which indicated that the growth of shrimp in both cultured ponds was negatively allometric. A difference in mean of different morphometric parameters was found at 0.622-15.270 in the earthen pond and 0.578-18.960 in polyethene lined pond which was categorized into two categories (<10 and >15) groups, depicting that out of seventeen parameters sixteen parameters were genetically controlled while only one parameter was environmentally controlled. The findings of such a study certainly help the farm managers and researchers to find out the growth status and improve the farm operations that will support to enhanced harvest of shrimp for more production.

Keywords

Shrimp, morphometric, earthen and polyethene-lined culture pond

Date : 17-11-2023