نتایج جستجو برای: 2009 a total of 1361 female sturgeon was caught including 788 acipenser persicus

تعداد نتایج: 23339537  

H. Rajabi Islami Y. Filizadeh

  Glyphosate, N–(phosphonomethyl) glycine, has been widely used to control agricultural weeds in the north of Iran. However, it is also supposed to have adverse effects on natural sturgeon population. The present study was undertaken to evaluate the acute toxicity of glyphosate to three different sturgeon species (Huso huso, Acipenser stellatus, and A. persicus) under laboratory conditions. Fis...

2002
VADIM J. BIRSTEIN P. DOUKAKIS R. DESALLE

A phylogenetic hypothesis is presented illustrating relationships among 23 extant sturgeon species based on nucleotide data from five mitochondrial genes (cytochrome b, NADH5, control region, 16S, and 12S). The tree supports our previous hypotheses regarding relationships among species of Acipenser and Huso. The introduction of Scaphirhynchus and Pseudoscaphirhynchus to the analysis does not ch...

H. Rajabi Islami , Y. Filizadeh ,

  Glyphosate, N–(phosphonomethyl) glycine, has been widely used to control agricultural weeds in the north of Iran. However, it is also supposed to have adverse effects on natural sturgeon population. The present study was undertaken to evaluate the acute toxicity of glyphosate to three different sturgeon species (Huso huso, Acipenser stellatus, and A. persicus) under laboratory conditions. Fis...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید مدنی آذربایجان - دانشکده ادبیات و زبانهای خارجی 1389

according to coates’s (2004, as cited in zhang, 2010) definition of "conversational dominance" (p.111), it refers to the phenomenon of a speaker dominating others in interaction. specifically, it means how a speaker makes use of certain strategies to get the floor and maintain the floor. thus, the amount of talk is the main measurement for the dominance of the conversation. whether a speaker do...

2012
Matthew T. Balazik Stephen P. McIninch Greg C. Garman Robert J. Latour

Historically the Chesapeake Bay supported a large population of Atlantic sturgeon Acipenser oxyrinchus, but loss of suitable spawning habitat and overfishing coincided with dramatic in-system declines throughout the 20th century. Atlantic sturgeon harvest moratoriums were implemented in 1974 for Virginia waters and were expanded coastwide in 1998. In 1997, researchers became aware that commerci...

Journal: :بهره برداری و پرورش آبزیان 0
هاجر آذرین دانشگاه منابع طبیعی گرگان محمدرضا ایمانپور دانشگاه علوم کشاورزی و منابع طبیعی گرگن وحید تقی زاده دانشگاه علوم کشاورزی و منابع طبیعی گرگان محمد پور دهقانی انستیتو ماهیان خاویاری

the correlation between serum steroid hormones, testosterone (t), 17β-estradiol (e2), and progesterone (p) and weight of female fishes, biological characteristics of gonad (e.g. fertilization rate, fluid egg rate, gonadosomatic index , polarization index and oocyte diameter) in 10 female of the migratory population of sterlet (acipenser ruthenus) and 5 female of the migratory population of sibe...

D. Kor E. J. Heist F. Laloei J. M. Panandam M. J. Taghavi M. Moghim, M. Pourkazemi R. Pourgholam S. G. Tan S. S. Siraj

 In order to have a sustainable management on Persian sturgeon as a highly commercial species in the South Caspian Sea, we need to identify its population structure and the level as well as its conservation status in their natural habitat. To develop a conservation program for this all Caspian Sea' sturgeon species it requires knowledge of its genetic diversity using reliable molecular marker t...

Journal: :Genetics and molecular research : GMR 2016
X J Zhang H Y Jiang L M Li L H Yuan J P Chen

The aim of this study was to provide comprehensive insights into the genetic background of sturgeon by transcriptome study. We performed a de novo assembly of the Amur sturgeon Acipenser schrenckii transcriptome using Illumina Hiseq 2000 sequencing. A total of 148,817 non-redundant unigenes with base length of approximately 121,698,536 bp and ranges from 201 to 26,789 bp were obtained. All the ...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده زبانهای خارجی 1392

toury (1978:200) believes that translation is a kind of activity which inevitably involves at least two languages and two cultural traditions. being polite while asking for something takes place differently in different cultures and languages, therefore various strategies may be applied for making requests and also translation of them in order not to disturb or threaten the face or better to sa...

Journal: :بهره برداری و پرورش آبزیان 0
سید امین میر هاشمی رستمی مرکز تحقیقات ذخایر آبزیان آبهای داخلی گرگان کوروش امینی مرکز تحقیقات ذخایر آبزیان آبهای داخلی گرگان فاطمه خانی دانشجوی دکتری رشته شیلات، تکثیر و پرورش آبزیان. دانشگاه علوم کشاورزی و منابع طبیعی گرگان حامد کلنگی میاندره گروه شیلات، تکثیر و پرورش آبزیان، دانشگاه علوم کشاورزی و منابع طبیعی گرگان

sturgeons in the caspian sea due to its unique characteristics in terms of economic and social in caspian countries have a high economic value at the national and even international levels. persian sturgeon (acipenser persicus) is considered one of the most valuable caspian sea fishes in terms of restocking, caviar and meat production. nowadays, the possibility of persian sturgeon proliferation...

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