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Study of reproduction of anchovy Engraulis encrasicolus (Actinopterygii,Engraulidae) in the central area of the Moroccan Atlantic coast
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نویسنده
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baali a. ,bourassi h. ,falah s. ,abderrazik w. ,el qoraychy i. ,amenzoui k. ,yahyaoui a.
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منبع
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journal of materials and environmental science - 2017 - دوره : 8 - شماره : 12 - صفحه:4467 -4474
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چکیده
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A study on the sexual cycle,of the european anchovy,the pelagic fish,engraulis encrasicolus (clupeiformes,engraulidae),was carried out in the central atlantic moroccan coast in the period between january 2013 and december 2013. this work represents the first attempt to investigate the reproductive features of the e. encrasicolus population in this area. the sex ratio for all fish (1:1.32) was in favour of females. the macroscopic examination of the gonads showed that this specie is mature throughout the year. the gonado-somatic index presented a maximum value (4-7 %) during april- september,and decreased gradually to reach minimum value (1-2 %) in november. the size at first sexual maturity (l50 ) is 9.82 cm for males against 9.96 cm for females. © 2017,university of mohammed 1er oujda morocco
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کلیدواژه
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Condition factor; Engraulis encrasicolus; Gonado-somatic index; Sex-ratio; Sexual maturity
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آدرس
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laboratory of zoology and general biology,faculty of science,mohammed v university,ibn battouta avenue,b.p. 1014,rabat, Morocco, laboratory of zoology and general biology,faculty of science,mohammed v university,ibn battouta avenue,b.p. 1014,rabat, Morocco, laboratory of zoology and general biology,faculty of science,mohammed v university,ibn battouta avenue,b.p. 1014,rabat, Morocco, laboratory of immunology and biodiversity,faculty of science ain chock,hassan ii university,maarif,b.p. 5366,casablanca, Morocco, laboratory of zoology and general biology,faculty of science,mohammed v university,ibn battouta avenue,b.p. 1014,rabat, Morocco, national fisheries research institute,equestrian club ould jmel,sidi abderrahmane road,b.p. 20050,casablanca, Morocco, laboratory of zoology and general biology,faculty of science,mohammed v university,ibn battouta avenue,b.p. 1014,rabat, Morocco
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Authors
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