نتایج جستجو برای: caspian sea kutum

تعداد نتایج: 131902  

Journal: Caspian Journal of Enviromental Sciences 2017
E. Bavand Savadkouhi, H. Khara

In this study, we investigated the age-dependent changes in reproductive efficiency of Kutum, Rutilus frisii  caught  from Shirood River,  the Southern Caspian Sea (Mazandaran Province, Iran). Age-dependent reproductive performance of brooders was assayed on two age and sex groups. Results revealed thatthere were no significant differences in sperm characteristics between age groups. All female...

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2014
Richard HECKMANN Ali HALAJIAN Atif EL-NAGGAR Wilmien LUUS-POWELL

BACKGROUND Main objective of this study was to investigate the invasive activity of the liver fluke, Pseudamphistomom truncatum against the Caspian seal (Pusa caspica) and was exemplified at the gross, light microscopy (LM) and electron microscopy (EM) levels. METHODS The study was done on a freshly dead Caspian Seal in the southern coast of Caspian Sea. The checked Caspian seal probably bein...

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Journal: :Archives of Polish Fisheries 2016

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Journal: :SLOVENIAN VETERINARY RESEARCH 2018

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2017
Rashid Alijani Ardeshir Hossein Zolgharnein Abdolali Movahedinia Negin Salamat Ebrahim Zabihi

Fipronil is an effective insecticide widely used in agriculture with potential ecotoxicological consequences. The median lethal dose (LD50) and concentration (LC50) of fipronil in 16.3 g Caspian white fish, Rutilus frisii kutum fingerlings were determined. To determine the LD50, a total of 133 fish were assigned to 19 tanks (7 fish/tank) including one control and 6 treatment groups (300, 450, 5...

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Journal: :Oceanological and Hydrobiological Studies 2022

Since the 1990s, anthropogenic activities have been major direct or indirect threats to structural and functional organization of unique ecosystem Caspian Sea (CS). This study attempts investigate relationships between fish community structure environmental parameters analyze Abundance Biomass Comparison (ABC) in CS. The input data, including catch data by species parameters, were collected fro...

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Journal: :Reviews in Fish Biology and Fisheries 2010

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Journal: :Emerging Infectious Diseases 2000
S. Kennedy T. Kuiken P. D. Jepson R. Deaville M. Forsyth T. Barrett M. W. van de Bildt A. D. Osterhaus T. Eybatov C. Duck A. Kydyrmanov I. Mitrofanov S. Wilson

Thousands of Caspian seals (Phoca caspica) died in the Caspian Sea from April to August 2000. Lesions characteristic of morbillivirus infection were found in tissue specimens from dead seals. Canine distemper virus infection was identified by serologic examination, reverse transcriptase- polymerase chain reaction, and sequencing of selected P gene fragments. These results implicate canine diste...

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Journal: :Molecular ecology 2006
Gemma E May Gregory W Gelembiuk Vadim E Panov Marina I Orlova Carol Eunmi Lee

The invasion of the zebra mussel, Dreissena polymorpha, into North American waters has resulted in profound ecological disturbances and large monetary losses. This study examined the invasion history and patterns of genetic diversity among endemic and invading populations of zebra mussels using DNA sequences from the mitochondrial cytochrome oxidase I (COI) gene. Patterns of haplotype frequency...

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2003
Alexei V. Kouraev Fabrice Papa Petr I. Buharizin Anny Cazenave Jean-Francois Cretaux Julia Dozortseva Frederique Remy

Kouraev et al. 2003: Polar Research 22(1), 43–50 A stable and strong ice cover forms during winter months in the Aral Sea and northern part of the Caspian Sea. The presence of ice cover negatively affects navigation and fi shery condi tions and endangers facilities located on the coast as well as on the shelf, such as oil rigs that have recently been installed in the northern Caspian by Russia ...

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