Recapture and condition of pond-reared, and hatchery-reared 1 + European grayling stocked in addition to wild conspecifics in a small river
The relative performance of European grayling Thymallus thymallus reared in a hatchery on commercial dry feed or in a pond with natural food and their wild conspecifics, was assessed through recapture of tagged fish 5 months after their release into the Blanice River, C...
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| Format: | Article |
| Language: | English |
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EDP Sciences
2012-06-01
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| Series: | Knowledge and Management of Aquatic Ecosystems |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1051/kmae/2012016 |
| _version_ | 1818514525398237184 |
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| author | Turek J. Horký P. Žlábek V. Velíšek J. Slavík O. Randák T. |
| author_facet | Turek J. Horký P. Žlábek V. Velíšek J. Slavík O. Randák T. |
| author_sort | Turek J. |
| collection | DOAJ |
| description | The relative performance of European grayling Thymallus thymallus reared
in a hatchery on commercial dry feed or in a pond with natural food and their wild
conspecifics, was assessed through recapture of tagged fish 5 months after their release
into the Blanice River, Czech Republic. One-year old pond and hatchery reared fish from a
resident broodstock were marked using Visible Implant Elastomer tags and released into 3
sections of river in May 2006. Wild one-year-old grayling were also tagged in these
sections on the same days. The ratio of hatchery reared, pond reared, and wild fish was
1:1:1 in all sections. The recapture rate (hatchery 14.9%, pond 22.1%, and wild 51.3%) and
site fidelity (hatchery 7.8%, pond 13.0%, and wild 35.1%) were significantly different
among groups. Wild fish had a higher probability of recapture upstream of their original
section than did hatchery or pond reared fish. Pond rearing was superior to conventional
hatchery rearing for subsequent stocking of 1 + grayling in running water. Initially
different mean condition factors were similar in all groups at recapture, suggesting
adaptation of the artificially reared fish that remained in the river sections surveyed. |
| first_indexed | 2024-12-11T00:17:01Z |
| format | Article |
| id | doaj.art-6956b39c9f204f679633a7fda9818dac |
| institution | Directory Open Access Journal |
| issn | 1961-9502 |
| language | English |
| last_indexed | 2024-12-11T00:17:01Z |
| publishDate | 2012-06-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | Knowledge and Management of Aquatic Ecosystems |
| spelling | doaj.art-6956b39c9f204f679633a7fda9818dac2022-12-22T01:27:55ZengEDP SciencesKnowledge and Management of Aquatic Ecosystems1961-95022012-06-0104051010.1051/kmae/2012016kmae120005Recapture and condition of pond-reared, and hatchery-reared 1 + European grayling stocked in addition to wild conspecifics in a small riverTurek J.0Horký P.1Žlábek V.2Velíšek J.3Slavík O.4Randák T.5University of South Bohemia in Ceské Budejovice, Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses and Research Institute of Fish Culture and HydrobiologyTGM – Water Research InstituteUniversity of South Bohemia in Ceské Budejovice, Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses and Research Institute of Fish Culture and HydrobiologyUniversity of South Bohemia in Ceské Budejovice, Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses and Research Institute of Fish Culture and HydrobiologyTGM – Water Research InstituteUniversity of South Bohemia in Ceské Budejovice, Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses and Research Institute of Fish Culture and HydrobiologyThe relative performance of European grayling Thymallus thymallus reared in a hatchery on commercial dry feed or in a pond with natural food and their wild conspecifics, was assessed through recapture of tagged fish 5 months after their release into the Blanice River, Czech Republic. One-year old pond and hatchery reared fish from a resident broodstock were marked using Visible Implant Elastomer tags and released into 3 sections of river in May 2006. Wild one-year-old grayling were also tagged in these sections on the same days. The ratio of hatchery reared, pond reared, and wild fish was 1:1:1 in all sections. The recapture rate (hatchery 14.9%, pond 22.1%, and wild 51.3%) and site fidelity (hatchery 7.8%, pond 13.0%, and wild 35.1%) were significantly different among groups. Wild fish had a higher probability of recapture upstream of their original section than did hatchery or pond reared fish. Pond rearing was superior to conventional hatchery rearing for subsequent stocking of 1 + grayling in running water. Initially different mean condition factors were similar in all groups at recapture, suggesting adaptation of the artificially reared fish that remained in the river sections surveyed.http://dx.doi.org/10.1051/kmae/2012016Thymallus thymallusriver managementstockingrecapturegrayling |
| spellingShingle | Turek J. Horký P. Žlábek V. Velíšek J. Slavík O. Randák T. Recapture and condition of pond-reared, and hatchery-reared 1 + European grayling stocked in addition to wild conspecifics in a small river Knowledge and Management of Aquatic Ecosystems Thymallus thymallus river management stocking recapture grayling |
| title | Recapture and condition of pond-reared, and hatchery-reared
1 + European grayling stocked in addition to wild conspecifics in a small
river |
| title_full | Recapture and condition of pond-reared, and hatchery-reared
1 + European grayling stocked in addition to wild conspecifics in a small
river |
| title_fullStr | Recapture and condition of pond-reared, and hatchery-reared
1 + European grayling stocked in addition to wild conspecifics in a small
river |
| title_full_unstemmed | Recapture and condition of pond-reared, and hatchery-reared
1 + European grayling stocked in addition to wild conspecifics in a small
river |
| title_short | Recapture and condition of pond-reared, and hatchery-reared
1 + European grayling stocked in addition to wild conspecifics in a small
river |
| title_sort | recapture and condition of pond reared and hatchery reared 1 european grayling stocked in addition to wild conspecifics in a small river |
| topic | Thymallus thymallus river management stocking recapture grayling |
| url | http://dx.doi.org/10.1051/kmae/2012016 |
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