Study on population condition, gonadosomatic and hepatosomatic indices of Alosa species in the Southwest coast of the Caspian Sea (Guilan Province)

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TAGHAVI H.; MOHAMMADPOUR M.; RAHIMI BASHAR M.R.

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Journal: JOURNAL OF APPLIED ICHTHYOLOGICAL RESEARCH Year:2020 | Volume:8 | Issue:1 Page(s): 9-19

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Title

Study on population condition, gonadosomatic and hepatosomatic indices of Alosa species in the Southwest coast of the Caspian Sea (Guilan Province)

Author(s)

TAGHAVI H. | MOHAMMADPOUR M. | RAHIMI BASHAR M.R. | Issue Writer Certificate

Keywords

A.braschnikowiQ1

A.caspiaQ1

A.kessleriQ1

HepatosomaticQ1

GonadosomaticQ1

Abstract

In this study, Hepatosomatic and Gonadosomatic indices and population condition of Alosa species were studied. Sampling was carried out in five stations (Rudsar, Kelachay, Chaboksar, Chamkhaleh, and Kiashahr) on the eastern coast of Guilan Province in 2016. A total of 693 fish were collected and transferred to the laboratory. Fish samples were stored in 10% formalin solution. Three species of Alosa including A. braschnikowi, A. caspia, and A. Kessleri were identified and their relative frequencies were 51. 08%, 11. 25%, and 37. 67%, respectively. Fish were divided into seven age classes (1 to 7 years old), and the highest percentage of A. braschnikowi (at age 3), A. caspia (at age 4), and A. Kessleri (at age 4) were 39. 83%, 37. 18%, 40. 23%, respectively. The highest weight and length was observed in A. braschnikowi, which were 173. 05± 75. 32g and 270. 27± 39. 38mm, respectively. The lowest weight and length was observed in A. caspia, which was 137. 53± 52. 83g and 247. 66± 32. 11mm, respectively. Population condition, Gonadosomatic, and Hepatosomatic indices in these three species were recorded as A. braschnikowi (0. 18± 0. 01, 0. 14± 0. 01, and 0. 12± 0. 01), A. caspia (0. 9± 0. 04, 0. 9± 0. 06, and 0. 77± 0. 03), and A. Kessleri (1. 12± 0. 02, 1. 08± 0. 04, and 1. 2± 0. 02), respectively. The sex ratio in A. braschnikowi and A. Kessleri was 1: 1 (male to female) and 1: 1. 33 in A. caspia.

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APA: Copy

TAGHAVI, H., MOHAMMADPOUR, M., & RAHIMI BASHAR, M.R.. (2020). Study on population condition, gonadosomatic and hepatosomatic indices of Alosa species in the Southwest coast of the Caspian Sea (Guilan Province). JOURNAL OF APPLIED ICHTHYOLOGICAL RESEARCH, 8(1 ), 9-19. SID. https://sid.ir/paper/386027/en

Vancouver: Copy

TAGHAVI H., MOHAMMADPOUR M., RAHIMI BASHAR M.R.. Study on population condition, gonadosomatic and hepatosomatic indices of Alosa species in the Southwest coast of the Caspian Sea (Guilan Province). JOURNAL OF APPLIED ICHTHYOLOGICAL RESEARCH[Internet]. 2020;8(1 ):9-19. Available from: https://sid.ir/paper/386027/en

IEEE: Copy

H. TAGHAVI, M. MOHAMMADPOUR, and M.R. RAHIMI BASHAR, “Study on population condition, gonadosomatic and hepatosomatic indices of Alosa species in the Southwest coast of the Caspian Sea (Guilan Province),” JOURNAL OF APPLIED ICHTHYOLOGICAL RESEARCH, vol. 8, no. 1 , pp. 9–19, 2020, [Online]. Available: https://sid.ir/paper/386027/en

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