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Reproductive maturation and induced breeding of two geographical groups of grey mullet, Mugil cephalus Linnaeus, 1758

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Title Reproductive maturation and induced breeding of two geographical groups of grey mullet, Mugil cephalus Linnaeus, 1758
Not Available
 
Creator KrishnaSukumaran
Dani Thomas
M.U.Rekha
J. Raymond JaniAngel
Aritra Bera
Babita Mandal
R. Subburaj
G.Thiagarajan
M. Makesh
K. Ambasankar
K. Krishnakumar
M. Kailasam
K.K.Vijayan
 
Subject Reproductive maturation , induced breeding, grey mullet, Mugil cephalus, stocks
 
Description Not Available
Success in captive reproduction and hatchery-based seed production is fundamental for the development of
sustainable aquaculture of grey mullet in India. In the present study, the induced breeding and reproductive
performance of two geographically different groups of grey mullet, Mugil cephalus sourced from east and west
coasts of India were studied under captivity. Grey mullets sourced from east coast, Chennai, India (EP-E: eastern
mullet population in situ; 782.4 ± 58.26 g) and west coast, Ernakulam, India (WP-E: western mullet population
transferred to eastern location; 726.1 ± 31.09 g) were reared under uniform captive conditions at Muttukadu
Experimental Station, ICAR-CIBA, Chennai. On the east coast, captive maturation and reproductive performance
were studied for two years from October 2015 – January 2018 (EP-E and WP-E; N = 140). To accelerate
reproductive maturation, female mullets were treated with intramuscular cholesterol pellets of gonadotropinreleasing hormone (GnRHa, 200 μg/fish) and males with silastic implants of 17-α-methyl testosterone (5 mg/
fish). On the west coast, grey mullets (WP-W: western mullet population in situ; N = 130) were reared in earthen
ponds under similar experimental conditions as EP-E and WP-E. Fourteen induced breeding trials were carried
out in eastern population whereas 24 induced breeding trials were carried out in the western population. The
percentages of mature fish initially and at 12 and 24 months for EP-E were 48.7, 57.5, and 50% whereas for WPE, they were 0, 2.4, and 14.7% respectively. The maximum average oocyte diameter recorded for EP-E was 538
± 6 μm and that for WP-E was 564 ± 21 μm. The peak reproductive periods of captive grey mullet on the east
coast were November (EP-E) and December – January (WP-E). Induced breeding trials using EP-E were successful
using females with an average oocyte size in the range of 520–535 μm from 6th – 20th November and the
fertilisation rates ranged from 1 to 35%. The peak reproductive period of WP-W extended from June to August
and successful induced breeding trials were conducted using females with average oocyte size of 540–570 μm,
from 15th June – 20th July. The fertilisation percentage varied from 45 to 85%. Western mullet population
exhibited reproductive dysfunctions when maintained under captivity on the east coast. The reproductive periods of captive grey mullets on the east and west coasts of India are asynchronous and provide the opportunity
for two nonoverlapping breeding periods for captive reproduction of grey mullets in the region.
Not Available
 
Date 2022-04-25T10:23:53Z
2022-04-25T10:23:53Z
2021-04-15
 
Type Research Paper
 
Identifier Sukumaran, K., Thomas, D., Rekha, M.U., Angel, J.R.J., Bera, A., Mandal, B., Subburaj, R., Thiagarajan, G., Makesh, M., Ambasankar, K. and Krishnakumar, K., 2021. Reproductive maturation and induced breeding of two geographical groups of grey mullet, Mugil cephalus Linnaeus, 1758. Aquaculture, 536, p.736423.
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/71686
 
Language English
 
Relation Not Available;
 
Publisher Elsevier