Publication Date:
2021-05-19
Description:
The Anzali wetland is composed of eastern, western, central, Selke, Sorkhankol and Siahkesheem areas, which
are distinguished by some features. Periodic reviews of native and non-indigenous fish, especially the Anzali
lagoon fish, will help us to provide optimum and sustainable storage to protect their habitats. Therefore, this
project was carried out with the aim of investigating the status of Anzali wetland fish and the effect of
sedimentation basin construction on the composition, diversity, abundance, distribution and distribution of
Anzali wetland during the years 2013-14. Seasonal sampling of 14 stations was carried out by the Electroshocker
unit from May 2013 to May 2014. The caught fish were randomly selected and transferred to the laboratory and
then fish biometrics were analyzed (length, weight, age, gender and stage of examination).During a sampling
year, 6757 pieces of fish were counted and weighed. Identified fish belonged to 25 species of 22 genera and 7
families identified as CYPRINIDAE (80.15%), POECILIIDAE (16.41%) and ESOCIDAE (1.7%),
respectively.The highest frequency was Carassius gibelio (25.42%), Hemiculter leucisculus (21.75%) and
Gambusia holbrooki (16.42%), while Cyprinus carpio (35.2%) and Carassius auratus with the highest amount
of 29.6%.Of the fish caught, 346 pieces belonging to 9 species, sex determination, in which the ratio between
males to females in the Carassius auratus species was 1 to 11, and the Cyprinus carpio was approximately 34 to
35, in Esox lucius The ratio of sex 1 to 3 and in the Alburnus chalcoides is 3 to 1 ratio. Out of the total number of
447-year-olds, the maximum age belongs to 13-year-old Cyprinus carpio and 8-year-old Blicca bjoerkina. Age
of 3 years old with 21.7% and 1 year old with 21.3% was the most abundant variety.The lowest species diversity
index in the eastern part of the wetland, respectively, for sample size, species abundance, Shannon Wiener
species diversity index and Sampson dominant index were 524, 11, 1.8986 and 0.2987 respectively, and the
highest species diversity in the middle part, respectively With 3171, 22, 2.4080 and 1.0917. Overall, the results
of this project showed that during the time the species diversity of the lagoon fish has undergone various changes
that contribute to their decrease and increase, and experts who have already done fisheries research in the Anzali
wetland have emphasized it.
Description:
Iranian Fisheries Science Research Institute
Description:
Published
Keywords:
Biodiversity fish
;
Distribution
;
Abundance
Repository Name:
AquaDocs
Type:
Report
,
Refereed
Format:
88pp.
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