Effects of triploidy induction using heat shock on the hatching, survival and triploid rate of ornamental koi (Cyprinus carpio koi) larvae

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HATEFI SHIMA; SUDAGAR MOHAMMAD; HAJIBEGLOU ABASALI; HARSIJ MOHAMMAD

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Journal: JOURNAL OF ANIMAL ENVIRONMENT Year:2020 | Volume:11 | Issue:4 Page(s): 249-256

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Title

Effects of triploidy induction using heat shock on the hatching, survival and triploid rate of ornamental koi (Cyprinus carpio koi) larvae

Author(s)

HATEFI SHIMA | SUDAGAR MOHAMMAD | HAJIBEGLOU ABASALI | HARSIJ MOHAMMAD | Issue Writer Certificate

Keywords

Koi carpQ1

triploidyQ1

thermal shockQ1

Abstract

This study was carried out in order to assess the effect of thermal shock on induction of triploidy in Koi carp (Cyprinus carpio koi). Three shock temperatures (38, 40 and 42 ° C), five time of initiation of shock (1, 2, 4, 6 and 8 min after fertilization) and three shock durations (1, 2 and 3 min) were tested. A sample of eggs was collected as a control group. There were 46 experimental groups, including 45 treatments and 1 control. The results showed that the highest hatching rate (59. 49 %) was obtained in treatments 19 (4 min after fertilization for 1 min at 38 ° C), 10 (2 min after fertilization for 1 min at 38 ° C) and 28 (6 min after fertilization for 1 min at 38 ° C), while there were no significant differences between these treatments and the control (p > 0. 05). Also, there was a significant decrease of larvaesurvival rate with increased shock temperature and shock duration (P < 0. 05). The best triploidy rate (65. 95 %) and triploid yield (63. 75 %) were obtained in treatment of 40 º C for 2 min at 6 min after fertilization (treatment 32). Ratio of erythrocytes and nuclei volume in triploids to diploids was 2. 74 and 1. 92, respectively. According to the results, it seems that the use of heat shock of 40 º C, 6 min after fertilization for 2 min can be most effective treatment for induction of triploidy in Koi carp.

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APA: Copy

HATEFI, SHIMA, SUDAGAR, MOHAMMAD, HAJIBEGLOU, ABASALI, & HARSIJ, MOHAMMAD. (2020). Effects of triploidy induction using heat shock on the hatching, survival and triploid rate of ornamental koi (Cyprinus carpio koi) larvae. JOURNAL OF ANIMAL ENVIRONMENT, 11(4 ), 249-256. SID. https://sid.ir/paper/206596/en

Vancouver: Copy

HATEFI SHIMA, SUDAGAR MOHAMMAD, HAJIBEGLOU ABASALI, HARSIJ MOHAMMAD. Effects of triploidy induction using heat shock on the hatching, survival and triploid rate of ornamental koi (Cyprinus carpio koi) larvae. JOURNAL OF ANIMAL ENVIRONMENT[Internet]. 2020;11(4 ):249-256. Available from: https://sid.ir/paper/206596/en

IEEE: Copy

SHIMA HATEFI, MOHAMMAD SUDAGAR, ABASALI HAJIBEGLOU, and MOHAMMAD HARSIJ, “Effects of triploidy induction using heat shock on the hatching, survival and triploid rate of ornamental koi (Cyprinus carpio koi) larvae,” JOURNAL OF ANIMAL ENVIRONMENT, vol. 11, no. 4 , pp. 249–256, 2020, [Online]. Available: https://sid.ir/paper/206596/en

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