Reproductive traits and population structure of the porcellanid crab <i>Petrolisthes japonicus</i> (Decapoda: Anomura: Porcellanidae)

a subtidal porcellanid crab, petrolisthes militaris (heller, 1862) (crustacea: decapoda: anomura), from the persian gulf, iran

the family porcellanidae is a group of crab-shaped anomurans and there are a series of studies on this group in the persian gulf. the first report of porcellanid crabs from the persian gulf was by heller (1861); who referred incidentally to two species of this group in a discussion of crustacea of the red sea.

Short Communication:A subtidal porcellanid crab, Petrolisthes militaris (Heller, 1862) (Crustacea: Decapoda: Anomura), from the Persian Gulf, Iran

Short Communication:A subtidal porcellanid crab, Petrolisthes militaris (Heller, 1862) (Crustacea: Decapoda: Anomura), from the Persian Gulf, Iran

Reproductive biology of the crab Munida subrugosa (Decapoda: Anomura: Galatheidae) in the Beagle Channel, Argentina

Munida subrugosawas sampled monthly from November 1997 to November 1999 in the Beagle Channel by means of an epibenthic trawl. The reproductive cycle started in May, re£ected by the occurrence of ovigerous females. Maximum size of oocytes, maximum value of gonadosomatic index in females (16.8 gmmcarapace length [CL]71) and males (1.6 gmmCL71), and the proportion ( 70%) of ovigerous females with...

the underlying structure of language proficiency and the proficiency level

هدف از انجام این تخقیق بررسی رابطه احتمالی بین سطح مهارت زبان خارجی (foreign language proficiency) و ساختار مهارت زبان خارجی بود. تعداد 314 زبان آموز مونث و مذکر که عمدتا دانشجویان رشته های زبان انگلیسی در سطوح کارشناسی و کارشناسی ارشد بودند در این تحقیق شرکت کردند. از لحاظ سطح مهارت زبان خارجی شرکت کنندگان بسیار با هم متفاوت بودند، (75 نفر سطح پیشرفته، 113 نفر سطح متوسط، 126 سطح مقدماتی). کلا ...