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En Hydrobiologie Marine Et Continentale Spécialité: RESSOURCE HALIEUTIQUE ET EXPLOITATION DURABLE

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dc.contributor.author GHALEM, Ghaniyya
dc.date.accessioned 2018-11-27T07:49:25Z
dc.date.available 2018-11-27T07:49:25Z
dc.date.issued 2016
dc.identifier.uri http://e-biblio.univ-mosta.dz/handle/123456789/2708
dc.description.abstract A study of the reproduction of the black sea urchin Arbacia lixula from Mostaganem coastline was conducted at once site rocky, rich in photophilous algae but disturbed by pollution (urban and industrial discharges) and high port activity. This work, spread over 3 months (febraury 2016-april (Salamander) 2016) and performed on 81 individuals, consisted to follow the monthly evolution of physiological indices (gonad index and index of repletion), the Sex-ratio. The Sex-ratio is slightly in favor of males with a slight monthly alternating between the sexes. According to the gonad index, the Spawning period is located in the mars and is possibly trigger by temperatures (20-23 C°). The Allometric relationships between different morphological parameters, diameter and height of the test without spines, height and diameter of Aristotle’s lantern, diameter of the test without spines and diameter of Aristotle’s lantern, test diameter without spines and wet weight, test height without spines and wet weight, demonstrate the existence of a more than average allometric relationship between these different growth parameters and reflect the flattening test of the black sea urchin A.lixula that can be regarded as a form of adaptation to its middle. en_US
dc.language.iso fr en_US
dc.subject Arbacia lixula en_US
dc.subject Salamander en_US
dc.subject physiological indices en_US
dc.subject sex-ratio en_US
dc.subject Spawning en_US
dc.subject allometric relationships en_US
dc.subject gonad index en_US
dc.subject repletion index. en_US
dc.subject صلا مندر en_US
dc.subject المؤشرات الفسیولوجیة en_US
dc.subject نسبة الجنس en_US
dc.subject الإباضة en_US
dc.subject العلاقات الألومتریة. en_US
dc.subject مؤشر الغدد التناسلیة en_US
dc.subject المؤشر المعوي en_US
dc.subject Salamandre en_US
dc.subject indices physiologiques en_US
dc.subject Sex-ratio en_US
dc.subject ponte en_US
dc.subject relation allométriques en_US
dc.subject indice gonadique en_US
dc.subject indice de réplétion en_US
dc.title En Hydrobiologie Marine Et Continentale Spécialité: RESSOURCE HALIEUTIQUE ET EXPLOITATION DURABLE en_US
dc.type Other en_US

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