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International Journal of Aquatic Biology، جلد ۴، شماره ۴، صفحات ۲۲۴-۰
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عنوان انگلیسی Allometric growth pattern, sexual dimorphism and size at the onset of sexual maturity in Opusia indica (Brachyura: Ocypodoidea: Camptandriidae) from mangrove areas of Pakistan
چکیده انگلیسی مقاله Size at sexual maturity and patterns of somatic growth are important aspects of reproductive history of crab. The main purpose of this study is to provide an estimate for the onset of morphological sexual maturity in mangrove crab, Opusia indica from a population located in Korangi creek intertidal mud flat (Karachi, Pakistan) based on relative growth. The crabs were monthly collected through quadrat method from March 2001 to February 2002. A total of 1702 crabs was obtained, of which 764 were males, 939 were female. The morphometric measurement of carapace, abdomen, cheliped and male gonopod was related to carapace width. Based on carapace width males were significantly larger than female, indicating sexual dimorphism. The size at onset of sexual maturity in males was estimated as 5.51 mm carapace width and 5.3 mm carapace width in females. The positive allometric growth of female abdominal width were likely related to the incubation process.
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نویسندگان مقاله نور us ساحر | noor us saher
centre of excellence in marine biology, university of karachi, karachi,pakistan.


naureen عزیز اقبال قریشی | naureen aziz qureshi
department of zoology, government college university, faisalabad, pakistan.


uroj عزیز | uroj aziz
a.p.w.a govt. degree college for women, karimabad, karachi, pakistan.
نشانی اینترنتی http://npajournals.com/ijab/index.php/ijab/article/view/541
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