<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>The poor results of lake-migratory brown trout, <italic>Salmo trutta lacustris</italic> L., restoration in Lake Hańcza Nature Reserve prompted undertaking the current study that sought to verify if hatchery-reared fish age 2+ can survive the critical period of acclimation and remain in the lake. Thirty-one individuals were tagged with coded acoustic transmitters and observed for 317 days. This method helped to analyze: 1) the spatial behavior of tagged fish for one year following their release; 2) the possible differences in the behavior of fish released in various places habitually used for stocking. By the end of study, 6.5–12.9% of the tagged fish remained in the lake. The most interesting phenomenon the data indicated was the trout behavior in late spring and early summer, when the fish moved vigorously along the longitudinal axis of the lake continuously for several weeks. The reasons for the fish movements observed in Lake Hańcza were not clear. For this unique species/population it is important to determine whether such behavior is typical of this fish also in other water bodies and if it is only seen in hatchery-reared fish aged 2+ and 3+.</p>
</abstract>

The poor results of lake-migratory brown trout, Salmo trutta lacustris L., restoration in Lake Hańcza Nature Reserve prompted undertaking the current study that sought to verify if hatchery-reared fish age 2+ can survive the critical period of acclimation and remain in the lake. Thirty-one individuals were tagged with coded acoustic transmitters and observed for 317 days. This method helped to analyze: 1) the spatial behavior of tagged fish for one year following their release; 2) the possible differences in the behavior of fish released in various places habitually used for stocking. By the end of study, 6.5–12.9% of the tagged fish remained in the lake. The most interesting phenomenon the data indicated was the trout behavior in late spring and early summer, when the fish moved vigorously along the longitudinal axis of the lake continuously for several weeks. The reasons for the fish movements observed in Lake Hańcza were not clear. For this unique species/population it is important to determine whether such behavior is typical of this fish also in other water bodies and if it is only seen in hatchery-reared fish aged 2+ and 3+.

Acoustic telemetry data on lake-migratory brown trout, <italic>Salmo trutta lacustris</italic> L., behavior in Lake Hańcza, northeastern Poland, within one year of release

Department of Ichthyology and Aquaculture

University of Warmia and Mazury in Olsztyn

Department of Ichthyology, Hydrobiology and Aquatic Ecology

Fisheries & Aquatic Life

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Acoustic telemetry data on lake-migratory brown trout,  L., behavior in Lake Hańcza, northeastern Poland, within one year of release

The poor results of lake-migratory brown trout, Salmo trutta lacustris L., restoration in Lake Hańcza Nature Reserve prompted undertaking the current study...

Acoustic telemetry data on lake-migratory brown trout, Salmo trutta lacustris L., behavior in Lake Hańcza, northeastern Poland, within one year of release

Publié en ligne: 14 juin 2022

Pages: 14 - 26

Reçu: 03 févr. 2022

Accepté: 28 mars 2022

DOI: https://doi.org/10.2478/aopf-2022-0002

Mots clés
hatchery-reared fish, species restoration, fish telemetry, fish migration

© 2022 Katarzyna Mierzejewska et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Acoustic telemetry data on lake-migratory brown trout, Salmo trutta lacustris L., behavior in Lake Hańcza, northeastern Poland, within one year of release

Publié en ligne: 14 juin 2022

Pages: 14 - 26

Reçu: 03 févr. 2022

Accepté: 28 mars 2022

DOI: https://doi.org/10.2478/aopf-2022-0002

Mots cléshatchery-reared fish, species restoration, fish telemetry, fish migration

© 2022 Katarzyna Mierzejewska et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Mots clés
hatchery-reared fish, species restoration, fish telemetry, fish migration