نتایج جستجو برای: paradactylodon gorganensis

تعداد نتایج: 26  

2009
STEPHEN C. PETERS JOEL D. BLUM CHARLES T. DRISCOLL E. LIKENS

Powdered and pelletized wollastonite (CaSiO3) was applied to an 11.8 ha forested watershed at the Hubbard Brook Experimental Forest (HBEF) in northern New Hampshire, U.S.A. during October of 1999. The dissolution of wollastonite was studied using watershed solute mass balances, and a Sr/ Sr isotopic tracer. The wollastonite (Sr/Sr = 0.70554) that was deposited directly into the stream channel b...

2018
Jian-ping Jiang Jia Jia Meihua Zhang Ke-Qin Gao

The Longdong Stream Salamander Batrachuperus londongensis, living in a mountain stream environment at Mt. Emei in Sichuan Province, China, represents a rare species that is facultatively neotenic in the family Hynobiidae. Although the species has been known to science for some 40 years since its initial discovery in the late 1970s, anatomical details of its osteology remain poorly understood an...

2012
Marylène BOULET Éric NORMANDEAU Bérénice BOUGAS Céline AUDET Louis BERNATCHEZ

Most salmonid taxa have an anadromous life history strategy, whereby fish migrate to saltwater habitats for a growth period before returning to freshwater habitats for spawning. Moreover, several species are characterized by different life history tactics whereby resident and anadromous forms may occur in genetically differentiated populations within a same species, as well as polymorphism with...

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

چکیده: ایران دربردارنده ی حیوانات گوناگونی است که بیشتر آنها ناشناخته مانده اند که دوزیستان از این مورد مستثنی نیستند. به دلیل وسعت زیاد کوهها و فلات ایران، تا الان مطالعه وسیعی روی دوزیستان صورت نگرفته است. از آنجایی که بررسی سیستماتیک و پراکنش گونه های دمدار خیلی مشکل بوده و نیاز به زمان زیادی داشته، از این رو کار مطالعه دوزیستان را با توجه به اطلاعات موجود در مورد آنها از سال 1387 شروع و. ن...

2009
J. C. Lydon M. D. Cornwell J. R. Foster T. E. Brooking S. Cavaliere

In this study, the adult population of Otsego Lake walleye was estimated in order to evaluate the success of the walleye stocking program. Spawning walleye were trap netted at five locations in April 2008, marked with a dorsal fin punch and visible implant elastomer, and recaptured in May using boat electro-fishing and in September by NYSDEC experimental gill net survey. Catch per unit effort a...

2007
Stephen M. Reilly STEPHEN M. REILLY

-Batrachuperus mustersi occurs only in the Paghman Mountains of Afghanistan in a single stream. They inhabit the cold sources of the stream where they are active year-round, feeding on aquatic organisms. Morphological examination revealed many similarities to other members of the genus. Differences were found in the tail morphology, degree of skeletal ossification and gill development. The only...

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