Archives
International Journal of Zoology and Applied Biosciences Research Article
Allometric growth patterns during larval stages of two major carps, catla (Catla catla) and rohu (Labeo rohita)
M. Asrar Sheriff and K. Altaff
Year : 2018 | Volume: 3 | Issue: 2 | Pages: 199-205
Received on: 04/17/2018
Revised on: 04/22/2018
Accepted on: 04/24/2018
Published on: 04/30/2018
-
M. Asrar Sheriff and K. Altaff ( 2018).
Allometric growth patterns during larval stages of two major carps, catla (Catla catla) and rohu (Labeo rohita)
. International Journal of Zoology and Applied Biosciences, 3( 2), 199-205.
-
click to view the cite format
Abstract
Morphological development and allometric growth of two hatchery-reared major carps catla (Catla catla) and rohu (Labeo rohita) were studied from hatching to metamorphosis (30 Days Post Hatch, DPH). The growth in terms of Total Length (TL) of Catla larvae from hatching until the juvenile stage increased from 5.9 mm TL to 43 mm. TL of Rohu larvae from hatching until the juvenile stage increased from 5.5 mm TL to 41mm. In both the species five developmental stages (yolk sac larvae, pre-flexion larvae, flexion larvae, post-flexion larvae and juvenile) were identified. The yolk sac stage lasted for about 3 days in Catla larvae while it lasted less than 3days in rohu larvae. In Catla larvae pre-flexion stage lasted from 4-9 DPH, flexion stage from 10 to 14 DPH and post-flexion stage lasted from 15 to 25 DPH. In rohu larvae pre-flexion stage lasted from 3-8 DPH, flexion stage from 9 to 13 DPH and post-flexion stage lasted from 14 to 23 DPH. Rapid and complex morphological changes were observed in both the species from hatching to post-flexion stages. The positive Allometry of head length from hatching to flexion stage of these fishes might be associated with the development of their sensory, feeding, respiratory and swimming systems.
Keywords
Major carps, Development, Allometry, Catla, Rohu.
