REPRODUCTION BIOLOGY OF CASPIAN SAND GOBY, NEOGOBIUS FLUVIATILIS PALLASI (BERG, 1916), NOOR COAST-CASPIAN SEA

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ALAVI YEGANEH M.S.; KALBASI M.R.

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Journal: JOURNAL OF MARINE SCIENCES AND TECHNOLOGY Year:2006 | Volume:4 | Issue:3-4 Page(s): 31-41

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Title

REPRODUCTION BIOLOGY OF CASPIAN SAND GOBY, NEOGOBIUS FLUVIATILIS PALLASI (BERG, 1916), NOOR COAST-CASPIAN SEA

Author(s)

ALAVI YEGANEH M.S. | KALBASI M.R. | Issue Writer Certificate

Keywords

GOBIIDAEQ3

CASPIAN SAND GOBYQ3

REPRODUCTIONQ3

Abstract

Reproduction biology of CASPIAN SAND GOBY, Neogobius fluviatilis pallasi, was studied during July 2004 to June 2005. Thirty fish were caught each month and their total length (TL), standard length (SL) and total weight were measured. Fish were then dissected and their liver and gonads were weighed. The average TL, SL and total weight were 102.85 6.7 mm, 86 5.1 mm and 12.23 3.05 g. For mature specimens, the average total length and weight in males (126.2 and 26.26) were more than females (106.3 and 12.65). Length – weight relationship showed isometric growth in this species. The estimated sex ratio of 1♀: 1.04♂ wasn’t significantly different from 1:1 (P<0.05), but at the start of REPRODUCTION in April, male ratio increased and in May, female ratio was more than male. Gonadosomatic index (GSI) changed when considerable changes in salinity, pH, temperature, and turbidity of water during March to April increased to maximum degree in April observed and decreased until July. Hepato-somatic index (HSI) decreased during this time, too. It seems that females mature in lower age. Results show that this subspecies breeds once a year and has relatively long reproductive season.

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APA: Copy

ALAVI YEGANEH, M.S., & KALBASI, M.R.. (2006). REPRODUCTION BIOLOGY OF CASPIAN SAND GOBY, NEOGOBIUS FLUVIATILIS PALLASI (BERG, 1916), NOOR COAST-CASPIAN SEA. JOURNAL OF MARINE SCIENCES AND TECHNOLOGY, 4(3-4), 31-41. SID. https://sid.ir/paper/74646/en

Vancouver: Copy

ALAVI YEGANEH M.S., KALBASI M.R.. REPRODUCTION BIOLOGY OF CASPIAN SAND GOBY, NEOGOBIUS FLUVIATILIS PALLASI (BERG, 1916), NOOR COAST-CASPIAN SEA. JOURNAL OF MARINE SCIENCES AND TECHNOLOGY[Internet]. 2006;4(3-4):31-41. Available from: https://sid.ir/paper/74646/en

IEEE: Copy

M.S. ALAVI YEGANEH, and M.R. KALBASI, “REPRODUCTION BIOLOGY OF CASPIAN SAND GOBY, NEOGOBIUS FLUVIATILIS PALLASI (BERG, 1916), NOOR COAST-CASPIAN SEA,” JOURNAL OF MARINE SCIENCES AND TECHNOLOGY, vol. 4, no. 3-4, pp. 31–41, 2006, [Online]. Available: https://sid.ir/paper/74646/en

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