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

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

doi:10.21077/ijf.2025.72.4.164507-07

Authors

M.Subramaniyan Institute of Fisheries Post Graduate Studies, Tamil Nadu Dr.J.Jayalalitha Fisheries University
Shiv Kumar Yadav Institute of Fisheries Post Graduate Studies, Tamil Nadu Dr. J. Jayalalitha Fisheries University, Chennai- 603103, Tamil Nadu, India.
M.Sakthivel ICAR-CMFRI, Mandapam Regional Centre, Tamil Nadu - 623 520, India.
V. Senthil Kumar Dr.M.G.R Fisheries College and Research Institute, Thalainayeru
E. Suresh Institute of Fisheries Post Graduate Studies, Tamil Nadu Dr. J. Jayalalitha Fisheries University, Chennai- 603103, Tamil Nadu, India.

https://doi.org/10.21077/ijf.2025.72.4.164507-07

Keywords:

Indian Major Carps, genetics

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

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Author Biographies

Shiv Kumar Yadav, Institute of Fisheries Post Graduate Studies, Tamil Nadu Dr. J. Jayalalitha Fisheries University, Chennai- 603103, Tamil Nadu, India.

Department of Fish Genetics and Breeding , PG Scholar
M.Sakthivel, ICAR-CMFRI, Mandapam Regional Centre, Tamil Nadu - 623 520, India.

Division of Mariculture and Principal Scientist
V. Senthil Kumar, Dr.M.G.R Fisheries College and Research Institute, Thalainayeru

Department of Fisheries Extension, Economics and Statistics and Associate Professor and Head
E. Suresh, Institute of Fisheries Post Graduate Studies, Tamil Nadu Dr. J. Jayalalitha Fisheries University, Chennai- 603103, Tamil Nadu, India.

Department of Fish Genetics and Breeding and Assistant Professor and Head

References

Badiger, P. G.1994. The effective population size and rate of inbreeding in Indian major carps in Gujarat hatcheries. M.Sc. Thesis, Central Institute of Fisheries Education, Mumbai, India, 34 PP.

Das, S. K.2012. Effective population size in carp hatcheries of Asom, India. Indian J. Anim. Sci., 82(9):1110. DOI: https://doi.org/10.56093/ijans.v82i9.23684

Das, P.C and Shajahan Ferosekhan, S. 2022. Recent Advances in Carp Culture in India. Director, ICAR-CIFRI;Convener, 1st Indian Fisheries Outlook; President, PFGF.73-83.

Deepak, P. K., Jahageerdar, S., Sharada, M. K., and Indira, N. K. 2005. Prediction of cumulative inbreeding rates in Indian major carps in Gujarat state hatcheries. Indian J. Fish., 52(4): 441-50.

Deepak, P. K., Jahageerdar, S., Sharada, M. K., And Indira, N. K. 2006. Cumulative Inbreeding rate in hatchery-reared Indian major carps of Karnataka and Maharashtra states. J. Indian Fish. Assoc., 33.

Eknath, A. E., & Doyle, R. W.1990. Effective population size and rate of inbreeding in aquaculture of Indian major carps. Aquac. 85(1-4):293-305. DOI: https://doi.org/10.1016/0044-8486(90)90028-L

Falconer, D.S., and Mackay, T.F.C.1996. Introduction to Quantitative Genetics, Longman Group UK Ltd, Harlow.

FAO/UNDP.1981. Conservation of genetic resources of fish: Problems and recommendations. Report of the expert consultation on the genetic resources of fish. FAO, Rome, FAO Fisheries technical paper no. 217.

Jahageerdar, S., Deepak, P. K., Biradar, R. S., & Lakra, W. S. 2004. Estimation of Cumulative Inbreeding Rate in Indian Major Carps of Maharashtra State Hatcheries. J. Aquac, 23-33. DOI: https://doi.org/10.61885/joa.v12.2004.9

Mishra, A., and A. K. Jain.1996. Annual rate of inbreeding of Indian major carps in two representative fish hatcheries of Uttar Pradesh and their growth evaluation. In: Mohan Joseph, M. and Mohan, C. V. (Eds.), Proceedings of the Third Indian Fisheries Forum, 11-14 October 1993. Pant Nagar, Uttar Pradesh, India, p. 97-100.

Suresh, E., Senthilkumar, V., Sakthivel, M., Sankar, M. And Karal Marx, K.2019.Assessment of Inbreeding rates in carp hatchery in Thanjavur district of Tamil Nadu, South India. World Aquaculture Society - Asian Pacific Aquaculture, 19-21 June 2019. Chennai, India.

Wright, S.1921. Systems of mating. II. The effects of inbreeding on the genetic composition of a population. Genetics, 6(2):124. DOI: https://doi.org/10.1093/genetics/6.2.124