Artificial breeding success, incubation period, and fecundity of rainbow trout, Oncorhynchus mykiss (Kamloops Strain), in Jaghour trout hatchery, Chitral

Authors

1 Institute of Zoological Sciences University of Peshawar Pakistan, Pakistan

2 Department of Zoology, University of Science and Technology Bannu, Khyber Pakhtunkhwa, Pakistan

3 Department of Zoology, Government Superior Science College Peshawar, 25000, Khyber Pakhtunkhwa, Pakistan

4 College of Wildlife and Protected Area, Northeast Forestry University, No. 26, Hexing Road, Harbin 150040, P.R. China

10.22092/ijfs.2024.132440

Abstract

Rainbow trout (Oncorhynchus mykiss; Kamloops strain), were introduced to Khyber Pakhtunkhwa in 1928 and are now successfully farming in the Malakand and Hazara divisions due to the region''s favorable cold-water conditions. Our study investigated the artificial breeding success, incubation period, and fecundity of rainbow trout at Jaghour trout hatchery in the district Chitral. A total of 4,311 eggs were harvested from four females with a combined body weight of 1.264 kg. The eggs were fertilized and incubated in spring water at temperatures ranging from 12.6 to 13.3°C. The survival and mortality rates from fertilization to hatching were approximately 79% and 21%, respectively. The eyed stage commenced at around 155±05 degree days (D°), with hatching occurring at approximately 305±05 D°. The incubation period spanned from 305±05 to 349±05 D°. Furthermore, the study explores female fecundity, revealing a range of 1.87 to 3.42 eggs per gram of body weight (n=15). The size of green ova increased by 1.02% to 8.60% during water hardening at 9°C for 1.5 h (n=46). Our study provides valuable insights into the incubation period of Rainbow trout, highlighting the survival and mortality rates of fertilized eggs in spring water. This information can assist local hatchery managers in estimating seed production from known brood stock.

Keywords

Iranian Journal of Fisheries Sciences
Volume 24, Issue 1
November 2025
Pages 85-97

Files

Share

How to cite

Statistics