M.Subramaniyan, Shiv Kumar Yadav, M.Sakthivel, V. Senthil Kumar, E. Suresh

Genetic health of Indian major carps: Assessment of effective population size and rate of inbreeding in fish hatcheries of Tamil Nadu, South India

Introduction

Genetic health of indian major carps: assessment of effective population size and rate of inbreeding in fish hatcheries of tamil nadu, south india. Assess genetic health, effective population size, and inbreeding rates in Indian major carps (catla, rohu, mrigal) from Tamil Nadu fish hatcheries. Strategies for genetic quality & sustainability discussed.

Abstract

The present study evaluated the genetic health of hatchery populations of the Indian major carps (IMCs), catla Labeo (=Catla) catla), rohu Labeo rohita and mrigal Cirrhinus mrigala in Tamil Nadu, South India. The study was based on the data collected during the 2023-2024 breeding season from 16 private hatcheries and 3 government hatcheries in Tamil Nadu. The estimated effective population size (Nₑ) ranged from 13 to 640 for catla, 18 to 1015 for rohu and 9 to 474 for mrigal. Correspondingly, inbreeding rates varied from 0.08% to 3.89% in catla,0.05% to 2.75% in rohu, and 0.11% to 5.63% in mrigal, indicating varying levels of genetic risk among hatcheries. Effective ways to control and prevent further accumulation of inbreeding are discussed in this paper, in order to improve the genetic quality and long-term sustainability of captive seed production of IMCs. Keywords: Carp seed, Catla, Hypophysation techniques, Induced breeding, Rohu, Mrigal

Full Text

Comments

You need to be logged in to post a comment.