Contributions to the assessment of Astacus leptodactylus Eschscholtz, 1823 stocks from the Razim-Sinoie lagoonary area (Danube Delta Biosphere Reserve, Romania)
In August 24th- August 30th, 2012 period there was performed a pilot study to assess the Slender clawded or Turkish crayfish (Astacus leptodactylus Eschscholtz, 1823) populations from Golovița Lake and the southern part of the Razim Lake (both of them located in the Danube Delta Biosphere Reserve -...
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| Format: | Article |
| Language: | English |
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CITDD Publishing House
2013-12-01
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| Series: | Scientific Annals of the Danube Delta Institute |
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| Online Access: | http://www.ddni.ro/manager/editor/UserFiles/File/Scientific%20annals/volume/19/19.Final/art_18.pdf |
| _version_ | 1819263422933499904 |
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| author | TÖRÖK Zsolt Csaba |
| author_facet | TÖRÖK Zsolt Csaba |
| author_sort | TÖRÖK Zsolt Csaba |
| collection | DOAJ |
| description | In August 24th- August 30th, 2012 period there was performed a pilot study to assess the Slender clawded or Turkish crayfish (Astacus leptodactylus Eschscholtz, 1823) populations from Golovița Lake and the southern part of the Razim Lake (both of them located in the Danube Delta Biosphere Reserve - DDBR). There were used 10 sets of traps (each set with 10 traps) and after 147 – 149 hours of functioning there were captured 45 specimens of A. leptodactylus, the total biomass of the crayfish being 1,768 g, which is a very low if compared with the official crayfish-quotas issued for various other regions of the DDBR. The scarcity in Astacus leptodactylus of the Razim- Sinoie lagoonary area is probably due to the habitat-requirement of this species (although other stressing factors – as plagues affecting the crayfish– could also be considered to explain the phenomenon). In order to harvest the minimum quantity (100 kg) of crayfish issued as official quota in case of various other regions of the DDBR, the method involving 10 sets with 10 traps should be continuously used for about 370 days – the costs of activities for such long period (combined with the fact that in case of the exploited crayfish quantities there have to be paid various taxes for the environmental protection authorities) makes economically unprofitable the crayfish stock-harvesting (based on the method used in the present study) in the Razim and Golovița lakes
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| first_indexed | 2024-12-23T20:13:21Z |
| format | Article |
| id | doaj.art-1d3d4fbc15a349899c85b7e9ffe0e5cb |
| institution | Directory Open Access Journal |
| issn | 1842-614X 2247-9902 |
| language | English |
| last_indexed | 2024-12-23T20:13:21Z |
| publishDate | 2013-12-01 |
| publisher | CITDD Publishing House |
| record_format | Article |
| series | Scientific Annals of the Danube Delta Institute |
| spelling | doaj.art-1d3d4fbc15a349899c85b7e9ffe0e5cb2022-12-21T17:32:46ZengCITDD Publishing HouseScientific Annals of the Danube Delta Institute1842-614X2247-99022013-12-011913914410.7427/DDI.19.18Contributions to the assessment of Astacus leptodactylus Eschscholtz, 1823 stocks from the Razim-Sinoie lagoonary area (Danube Delta Biosphere Reserve, Romania)TÖRÖK Zsolt Csaba0Danube Delta National Institute for Research and Development, Tulcea, Romania;In August 24th- August 30th, 2012 period there was performed a pilot study to assess the Slender clawded or Turkish crayfish (Astacus leptodactylus Eschscholtz, 1823) populations from Golovița Lake and the southern part of the Razim Lake (both of them located in the Danube Delta Biosphere Reserve - DDBR). There were used 10 sets of traps (each set with 10 traps) and after 147 – 149 hours of functioning there were captured 45 specimens of A. leptodactylus, the total biomass of the crayfish being 1,768 g, which is a very low if compared with the official crayfish-quotas issued for various other regions of the DDBR. The scarcity in Astacus leptodactylus of the Razim- Sinoie lagoonary area is probably due to the habitat-requirement of this species (although other stressing factors – as plagues affecting the crayfish– could also be considered to explain the phenomenon). In order to harvest the minimum quantity (100 kg) of crayfish issued as official quota in case of various other regions of the DDBR, the method involving 10 sets with 10 traps should be continuously used for about 370 days – the costs of activities for such long period (combined with the fact that in case of the exploited crayfish quantities there have to be paid various taxes for the environmental protection authorities) makes economically unprofitable the crayfish stock-harvesting (based on the method used in the present study) in the Razim and Golovița lakes .http://www.ddni.ro/manager/editor/UserFiles/File/Scientific%20annals/volume/19/19.Final/art_18.pdfAstacus leptodactylusstocksnatural resourcesDanube Delta Biosphere ReserveRazim-Sinoie lagoonary areaRomania |
| spellingShingle | TÖRÖK Zsolt Csaba Contributions to the assessment of Astacus leptodactylus Eschscholtz, 1823 stocks from the Razim-Sinoie lagoonary area (Danube Delta Biosphere Reserve, Romania) Scientific Annals of the Danube Delta Institute Astacus leptodactylus stocks natural resources Danube Delta Biosphere Reserve Razim-Sinoie lagoonary area Romania |
| title | Contributions to the assessment of Astacus leptodactylus Eschscholtz, 1823 stocks from the Razim-Sinoie lagoonary area (Danube Delta Biosphere Reserve, Romania) |
| title_full | Contributions to the assessment of Astacus leptodactylus Eschscholtz, 1823 stocks from the Razim-Sinoie lagoonary area (Danube Delta Biosphere Reserve, Romania) |
| title_fullStr | Contributions to the assessment of Astacus leptodactylus Eschscholtz, 1823 stocks from the Razim-Sinoie lagoonary area (Danube Delta Biosphere Reserve, Romania) |
| title_full_unstemmed | Contributions to the assessment of Astacus leptodactylus Eschscholtz, 1823 stocks from the Razim-Sinoie lagoonary area (Danube Delta Biosphere Reserve, Romania) |
| title_short | Contributions to the assessment of Astacus leptodactylus Eschscholtz, 1823 stocks from the Razim-Sinoie lagoonary area (Danube Delta Biosphere Reserve, Romania) |
| title_sort | contributions to the assessment of astacus leptodactylus eschscholtz 1823 stocks from the razim sinoie lagoonary area danube delta biosphere reserve romania |
| topic | Astacus leptodactylus stocks natural resources Danube Delta Biosphere Reserve Razim-Sinoie lagoonary area Romania |
| url | http://www.ddni.ro/manager/editor/UserFiles/File/Scientific%20annals/volume/19/19.Final/art_18.pdf |
| work_keys_str_mv | AT torokzsoltcsaba contributionstotheassessmentofastacusleptodactyluseschscholtz1823stocksfromtherazimsinoielagoonaryareadanubedeltabiospherereserveromania |