نتایج جستجو برای: aphanius sophiae

تعداد نتایج: 233  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم 1390

تا کنون حدود 202 گونه ماهی از آبهای داخلی ایران گزارش شده است که در 104 جنس، 28 خانواده، 17 راسته و 3 رده قرار می گیرند . خانواده کپورماهیان دندان دار با داشتن 8 گونه در مقام پنجم از لحاظ تنوع گونه ای در ایران قرار دارد. جنس aphanius تنها جنس این خانواده در ایران است که شناسایی اعضای آن در ابتدا بر اساس بررسی ریخت سنجی سنتی و نیز الگوی رنگی آنها انجام شده است اما به تدریج فاکتورهای دیگری مثل شک...

Journal: :Sultan Qaboos University Journal for Science [SQUJS] 1999

Journal: :محیط زیست طبیعی 0
معصومه آریایی کارشناس ارشد محیط زیست، دانشکدۀ منابع طبیعی، دانشگاه تهران، ایران امیرحسین حمیدیان استادیار گروه محیط زیست، دانشکدۀ منابع طبیعی، دانشگاه تهران، ایران سهیل ایگدری استادیار گروه شیلات، دانشکدۀ منابع طبیعی، دانشگاه تهران، ایران سهراب اشرفی استادیار گروه محیط زیست، دانشکدۀ منابع طبیعی، دانشگاه تهران، ایران

abstractthe purpose of this study was to compare the heavy metal uptake of cd in liver tissue of endemic fish aphanius sophiae in the saltwater eshtehard of karaj and fresh water in laboratory conditions, the relationship between cadmium accumulation in the liver, the effect of salinity and different concentrations of cd uptake. sampling did randomly from salt river in the spring and summer 201...

Journal: :Science and technology of advanced materials 2011
Takayuki Murosaki Nafees Ahmed Jian Ping Gong

Marine sessile organisms easily adhere to submerged solids such as rocks, metals and plastics, but not to seaweeds and fishes, which are covered with soft and wet 'hydrogel'. Inspired by this fact, we have studied long-term antifouling properties of hydrogels against marine sessile organisms. Hydrogels, especially those containing hydroxy group and sulfonic group, show excellent antifouling act...

Journal: :Biology letters 2008
Jennifer M Gumm Jennifer L Snekser Murray Itzkowitz

Conservation of naturally sympatric endangered species requires unique considerations. While impacts of invasive species garner much attention, interactions between endangered species must also be managed. The endangered Leon Springs pupfish, Cyprinodon bovinus, has suffered a population decline due to decreasing natural habitat. As breeding habitat is lost, C. bovinus is also adversely affecte...

Journal: :Diseases of aquatic organisms 1999
E Alcaide C Amaro R Todolí R Oltra

High mortality among laboratory cultured Iberian toothcarp Aphanius iberus occurred in February 1997 in Valencia (Spain). The main signs of the disease were external haemorrhage and tail rot. Bacteria isolated from internal organs of infected fish were biochemically homogeneous and identified as Vibrio parahaemolyticus. The bacteria were haemolytic against erythrocytes from eel Anguilla anguill...

Journal: :Molecular phylogenetics and evolution 2004
Tomas Hrbek Kai N Stölting Fevzi Bardakci Fahrettin Küçük Rudolf H Wildekamp Axel Meyer

We investigated the phylogenetic relationships of Pseudophoxinus (Cyprinidae: Leuciscinae) species from central Anatolia, Turkey to test the hypothesis of geographic speciation driven by early Pliocene orogenic events. We analyzed 1141 aligned base pairs of the complete cytochrome b mitochondrial gene. Phylogenetic relationships reconstructed by maximum likelihood, Bayesian likelihood, and maxi...

Journal: :Physiological and biochemical zoology : PBZ 2000
I Plaut

Specimens of the euryhaline cyprinodontid fish, Aphanius dispar, collected in salt ponds, were acclimated to salinities of <1 (freshwater), 35 (seawater), 70, 105, and 140 ppt for 4 wk before measurement of oxygen consumption, critical swimming speed, and routine activity level. Oxygen consumption was similar in <1, 35, and 70 ppt (0.18+/-0.07, 0.17+/-0.06, and 0.16+/-0.04 mL h(-1) g(-1), respe...

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