Staff View: Maturity stages, Gonado-Somatic Index (GSI) and fecundity of leaping grey mullet, Liza saliens (Risso, 1810) in the western part of Iranian waters of the Caspian Sea (Guilan Province, Iran)

Maturity stages, Gonado-Somatic Index (GSI) and fecundity of leaping grey mullet, Liza saliens (Risso, 1810) in the western part of Iranian waters of the Caspian Sea (Guilan Province, Iran)

The paper focuses on some of the biological characteristics of leaping grey mullet, Liza saliens (Risso,1810) in the western part of the Iranian waters of the Caspian Sea (off Guilan province). Samples of the mullet were taken monthly from commercial catch of beach seine fishing cooperatives (from O...

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Main Author:	Davoud, Ghaninejad
Format:	Journal Contribution
Language:	English
Published:	2019
Subjects:	Maturity Liza saliens Fecundity Mullets Caspian Sea Biological properties Catches Fishing nets Aging Shores Sexual maturity Bony fishes Ovaries Sex ratio Spawning
Online Access:	http://agris.upm.edu.my:8080/dspace/handle/0/16181
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spelling	oai:http:--agris.upm.edu.my:0-16181Maturity stages, Gonado-Somatic Index (GSI) and fecundity of leaping grey mullet, Liza saliens (Risso, 1810) in the western part of Iranian waters of the Caspian Sea (Guilan Province, Iran)Davoud, GhaninejadMaturityLiza saliensFecundityMulletsCaspian SeaBiological propertiesCatchesFishing netsAgingShoresSexual maturityBony fishesOvariesSex ratioSpawningThe paper focuses on some of the biological characteristics of leaping grey mullet, Liza saliens (Risso,1810) in the western part of the Iranian waters of the Caspian Sea (off Guilan province). Samples of the mullet were taken monthly from commercial catch of beach seine fishing cooperatives (from October 2008 to April 2009). From May to September 2009 (a period not considered fishing season here), fish samples were obtained from local markets which caught them illegally. Fork length (FL), weight and sex were recorded for 302 fish. In addition, gonad weights were recorded for calculating Gonado-Somatic Index (GSI) and scales were removed for aging. The M:F (male/female) sex ratio of this species was 1:2.23 during the whole course of the study which deviate significantly from 1:1 common sex ratio (χ2=59.83, sig. level=0.000, df=1). During 2008-2009, the peak of the spawning time for leaping grey mullet occurred in July in Guilan shores. The highest GSI was found to occur during June-August and declined to its lowest level in September and remained relatively stable during October to April. The average absolute fecundity of leaping grey mullet was 207,050±134,630 (±SD) eggs with a range of 29,700 and 512,900 eggs. The length of females at 50% sexual maturity was estimated at 23 cm.2019-08-26T04:35:47Z2019-08-26T04:35:47Z2011Journal ContributionArticleNon-RefereedAsian Fisheries Science (Malaysia), 24 (2), p. 115-1240116-6514http://agris.upm.edu.my:8080/dspace/handle/0/16181MY2019050862enhttps://www.asianfisheriessociety.org/publication/downloadfile.php?id=60&file=Y0dSbUx6QXdOVGN5TXpnd01ERXpOVFUzTkRBeU1EZ3VjR1Jt&dldname=Maturity%20Stages,%20Gonado-Somatic%20Index%20(GSI)%20and%20Fecundity%20of%20Leaping%20Grey%20Mullet,%20Liza%20saliens%20(Risso,%201810)%20in%20the%20Western%20Part%20of%20Iranian%20Waters%20of%20the%20Caspian%20Sea%20(Guilan%20Province,%20Iran).pdfIranhttp://www.oceandocs.org/license
institution	AGRIS
collection	AGRIS
language	English
topic	Maturity Liza saliens Fecundity Mullets Caspian Sea Biological properties Catches Fishing nets Aging Shores Sexual maturity Bony fishes Ovaries Sex ratio Spawning
spellingShingle	Maturity Liza saliens Fecundity Mullets Caspian Sea Biological properties Catches Fishing nets Aging Shores Sexual maturity Bony fishes Ovaries Sex ratio Spawning Davoud, Ghaninejad Maturity stages, Gonado-Somatic Index (GSI) and fecundity of leaping grey mullet, Liza saliens (Risso, 1810) in the western part of Iranian waters of the Caspian Sea (Guilan Province, Iran)
description	The paper focuses on some of the biological characteristics of leaping grey mullet, Liza saliens (Risso,1810) in the western part of the Iranian waters of the Caspian Sea (off Guilan province). Samples of the mullet were taken monthly from commercial catch of beach seine fishing cooperatives (from October 2008 to April 2009). From May to September 2009 (a period not considered fishing season here), fish samples were obtained from local markets which caught them illegally. Fork length (FL), weight and sex were recorded for 302 fish. In addition, gonad weights were recorded for calculating Gonado-Somatic Index (GSI) and scales were removed for aging. The M:F (male/female) sex ratio of this species was 1:2.23 during the whole course of the study which deviate significantly from 1:1 common sex ratio (χ2=59.83, sig. level=0.000, df=1). During 2008-2009, the peak of the spawning time for leaping grey mullet occurred in July in Guilan shores. The highest GSI was found to occur during June-August and declined to its lowest level in September and remained relatively stable during October to April. The average absolute fecundity of leaping grey mullet was 207,050±134,630 (±SD) eggs with a range of 29,700 and 512,900 eggs. The length of females at 50% sexual maturity was estimated at 23 cm.
format	Journal Contribution
author	Davoud, Ghaninejad
author_facet	Davoud, Ghaninejad
author_sort	Davoud, Ghaninejad
title	Maturity stages, Gonado-Somatic Index (GSI) and fecundity of leaping grey mullet, Liza saliens (Risso, 1810) in the western part of Iranian waters of the Caspian Sea (Guilan Province, Iran)
title_short	Maturity stages, Gonado-Somatic Index (GSI) and fecundity of leaping grey mullet, Liza saliens (Risso, 1810) in the western part of Iranian waters of the Caspian Sea (Guilan Province, Iran)
title_full	Maturity stages, Gonado-Somatic Index (GSI) and fecundity of leaping grey mullet, Liza saliens (Risso, 1810) in the western part of Iranian waters of the Caspian Sea (Guilan Province, Iran)
title_fullStr	Maturity stages, Gonado-Somatic Index (GSI) and fecundity of leaping grey mullet, Liza saliens (Risso, 1810) in the western part of Iranian waters of the Caspian Sea (Guilan Province, Iran)
title_full_unstemmed	Maturity stages, Gonado-Somatic Index (GSI) and fecundity of leaping grey mullet, Liza saliens (Risso, 1810) in the western part of Iranian waters of the Caspian Sea (Guilan Province, Iran)
title_sort	maturity stages, gonado-somatic index (gsi) and fecundity of leaping grey mullet, liza saliens (risso, 1810) in the western part of iranian waters of the caspian sea (guilan province, iran)
publishDate	2019
url	http://agris.upm.edu.my:8080/dspace/handle/0/16181
_version_	1819285195640012800
score	13.4562235

Maturity stages, Gonado-Somatic Index (GSI) and fecundity of leaping grey mullet, Liza saliens (Risso, 1810) in the western part of Iranian waters of the Caspian Sea (Guilan Province, Iran)

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