نتایج جستجو برای: portunus segnis
تعداد نتایج: 838 فیلتر نتایج به سال:
در این مطالعه کیتوزان از پوستهی خرچنگ شناگر آبی (Portunus segnis) استخراج و به‌عنوان مکمل غذایی در بچه ماهیهای کپور علفخوار (Ctenopharyngoden idella) مورداستفاده قرار گرفت. برای این منظور 360 عدد بچه ماهی (میانگین وزن 13/0 ± 8/0 گرم) از مرکز تکثیر و پرورش ماهیان گرمابی شهرستان فیروزکوه تهیه و به مدت 2 هفته با شرایط آزمایش (دانشگاه شهید بهشتی) سازگار شدند. بچه ماهیها به‌صورت کاملاً تصادفی در ...
The swimming crab Portunus trituberculatus is a durophagous brachyuran. Right-handed crabs are predominant, but left-handed crabs are also found in nature. Left-handedness may arise from loss of the right crusher. We examined whether heterochely (morphology) was correlated with differences in closing force (physical property) and handedness (behaviour). The closing force was stronger in larger ...
Understanding how aquatic species grow is fundamental in fisheries because stock assessment often relies on growth dependent statistical models. Length-frequency-based methods become important when more applicable data for growth model estimation are either not available or very expensive. In this article, we develop a new framework for growth estimation from length-frequency data using a gener...
Haemoproteus (Parahaemoproteus) parasites are transmitted by Culicoides biting midges. However, the natural vectors of only six almost 180 recognized species have been identified. The aim this study was to investigate wild midges naturally infected with and understand interaction network between in Europe. were collected UV light traps from different sites Lithuania. Parous females morphologica...
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