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363_369_Japoshvili, Advans. in Limnology.pdf

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http://eprints.org/relation/isVersionOf http://eprints.iliauni.edu.ge/id/document/1004 http://eprints.org/relation/isVolatileVersionOf http://eprints.iliauni.edu.ge/id/document/1004 http://eprints.org/relation/ismediumThumbnailVersionOf http://eprints.iliauni.edu.ge/id/document/1004 1010 2 3164 document 1010 small.jpg image/png 46927a89c6d411da9e0459de1a51ea84 MD5 1660 2014-01-20 14:02:03 http://eprints.iliauni.edu.ge/285/5/small.jpg 285 5 5 image/png other Thumbnails conversion from text to thumbnail_small ge public

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http://eprints.org/relation/isVersionOf http://eprints.iliauni.edu.ge/id/document/1004 http://eprints.org/relation/isVolatileVersionOf http://eprints.iliauni.edu.ge/id/document/1004 http://eprints.org/relation/issmallThumbnailVersionOf http://eprints.iliauni.edu.ge/id/document/1004 archive 53 disk0/00/00/02/85 2014-01-20 16:34:20 2014-01-20 16:34:20 2014-01-20 16:34:20 article show Japoshvili Bella bela_japoshvili@iliauni.edu.ge pub QL ins4 public A total sample of 1854 vendace (Coregonus albula L.) specimens was collected on a seasonal basis from Lake Paravani during 1999–2005. Nets of different types (seines, trap nets and gillnets) with various mesh sizes and length were used for sampling. Samples were collected from 3 horizontal strata. In the samples collected, most vendace were age 1+ and 2+ although a few individuals lived to age 4. Vendace is the dominant species comprising 70 % of the annual catch. Catches from this study were compared with historical data. It was found that the annual abundance of vendace decreased dramatically from 1994 to present, from 50 tonnes to 17 tonnes or less annually. The average size of vendace in catches has also decreased in recent years. We believe intensive poaching, in addition to commercial fi shing, climate changes and global warming, are the leading factors that have caused the decrease in overall number of individuals and the smaller sizes of adult vendace in the current population. 2012 Advances in Limnology 63 Schweizerbart Science Publishers 363-369 TRUE 1612-166X