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دوره 24، شماره 1 - ( 1403 ) |
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Research Article: Artificial breeding success, incubation period, and fecundity of rainbow trout, Oncorhynchus mykiss (Kamloops Strain), in Jaghour trout hatchery, Chitral
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چکیده: (442 مشاهده) |
| 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. |
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متن کامل [PDF 481 kb]
(568 دریافت)
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نوع مطالعه: كاربردي |
موضوع مقاله:
aquaculture
انتشار الکترونیک: 1403/9/12
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| ارسال نظر درباره این مقاله |
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Jan A, Zaidi F, Tariq Z, Rehman F, Rasheed S, Ullah H et al . Research Article: Artificial breeding success, incubation period, and fecundity of rainbow trout, Oncorhynchus mykiss (Kamloops Strain), in Jaghour trout hatchery, Chitral. IJFS 2025; 24 (1) :85-97 URL: http://jifro.ir/article-1-5730-fa.html
Research Article: Artificial breeding success, incubation period, and fecundity of rainbow trout, Oncorhynchus mykiss (Kamloops Strain), in Jaghour trout hatchery, Chitral. مجله علوم شیلاتی ایران. 1403; 24 (1) :85-97 URL: http://jifro.ir/article-1-5730-fa.html
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