نتایج جستجو برای: caspian sea coasts

تعداد نتایج: 133840  

ژورنال: بوم شناسی آبزیان 2023
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The aim of this study was to investigate the changes in the structure of the plankton community in the southwestern Caspian Sea and its relationship with the reduction of Rutilus frisii and Chelon auratus catches. The current study was conducted seasonally in the coasts of Guilan provience from 2020 to 2021. A total number of 48 genera and species of phytoplanktons were identified. Tthe finding...

Journal: :international journal of environmental research 2012
r. rahimi s.m. monavari m. karami m. shariat p. farshchi

breeding biology of the great cormorants phalacrocorax carbo sinensis is assessed in thesouthern coasts of the caspian sea, iran during the years 2008-2010. about 84 nests located on 63 trees wereexamined. nests were built on large trees located in abbas abad marsh, gilan province. initially, eggs werefound on first week of april and egg laying continued until the last week of may. clutch size ...

Mohammad Taghi Naseri, Neda Khosropanah, Parisa Nejatkhah-Manavi, Sara Koohilay,

Science and technological developments provide new opportunities to exploit aquatic resource. Hence, it is important to understand biotic and abiotic conditions of aquatic ecosystems. Objective of this Paper is to report findings of the study of nitrate and phosphate contents of water and effects of other physicalchemical parameters in the southwest regions of the Caspian Sea in the spring and ...

F Laloei , M Soltani, S Rezvani Gilkolaei , Z Saeidi,

Genetic diversity as an important marker of the ecological status of aquatic ecosystems is considered a unique and powerful tool to evaluate biological communities. In order to evaluate the genetic diversity among golden mullet species (Liza aurata) in the southeast and southwest coasts of the Caspian Sea by D-Loop gene sequencing, a total of 23 fin specimens of golden mullet were collected fro...

Journal: :Molecular ecology 2008
Joshua E Brown Carol A Stepien

During the past two decades, the round goby Apollonia melanostoma (=Neogobius melanostomus) has expanded its range via shipping transport and canals, extending north and west from the Ponto-Caspian region of Eurasia and to the North American Great Lakes. Exotic populations of the round goby have been very successful in the Baltic Sea and the Great Lakes regions, exerting significant ecological ...

2013
Fabián H. Acuña Agustín Garese Adriana C. Excoffon Jorge Cortés

Despite being important components in coastal marine systems, sea anemones have been poorly studied on both coasts of Costa Rica. In this paper new records of sea anemones are mentioned for the Caribbean and Pacific coasts of Costa Rica and the Isla del Coco National Park. Additionally, the presence of other species previously recorded in Costa Rica based on single observations or photos, is re...

2015
Nagissa Mahmoudi Michael S. Robeson Hector F. Castro Julian L. Fortney Stephen M. Techtmann Dominique C. Joyner Charles J. Paradis Susan M. Pfiffner Terry C. Hazen

The Caspian Sea is heavily polluted due to industrial and agricultural effluents as well as extraction of oil and gas reserves. Microbial communities can influence the fate of contaminants and nutrients. However, insight into the microbial ecology of the Caspian Sea significantly lags behind other marine systems. Here we describe microbial biomass, diversity and composition in sediments collect...

2012
Jacqueline Nolting Anthony C. Fries Richard D Slemons Chad Courtney Nichole Hines Janice Pedersen

In 2010, H14 influenza A viruses were recovered from clinically normal sea ducks in the United States. These are the first H14 isolates recovered in the Western Hemisphere and represent the only documented H14 influenza A viruses isolated since the original isolates were recovered from near the Caspian Sea during 1982.

Journal: :Water 2022

The prediction of ocean waves is a highly challenging task in coastal and water engineering general due to their very high randomness. In the present case study, an analysis wind, sea flow features, wave height southern coasts Caspian Sea, especially off-coast waters Mazandaran Province Northern Iran, was performed. Satellite altimetry-based significant heights associated with period observatio...

2017
Omid Beyraghdar Kashkooli Joachim Gröger Ismael Núñez-Riboni

The worldwide occurrence of complex climate-induced ecological shifts in marine systems is one of the major challenges in sustainable bio-resources management. The occurrence of ecological environment-driven shifts was studied in the Southern Caspian Sea using the "shiftogram" method on available fisheries-related (i.e. commercially important bentho-pelagic fish stocks) ecological and climatic ...

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