Enviar artigo por via de e-mail Tributary-Specific Contribution to a Lacustrine Mixed-Stock Fishery of Brown Trout Salmo trutta (Salmonidae) in a Diverse Sub-Arctic Watershed
- Autores: Mikheev P.1,2,3, Prusov S.4, Erkinaro J.5, Samokhvalov I.4, Dolotov S.4, Potutkin A.4, Orell P.5, Seppänen M.6, Kopylov I.2, Puzik A.4, Easton R.1, Reid M.7, Closs G.1
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Afiliações:
- Department of Zoology, University of Otago, Dunedin, New Zealand
- Perm State University, Perm, Russia
- Khabarovsk Branch of Russian Federal Research Institute of Fisheries and Oceanography, Khabarovsk, Russia
- Polar Branch of Russian Federal Research Institute of Fisheries and Oceanography, Murmansk, Russia
- Natural Resources Institute Finland (Luke), Oulu, Finland
- Metsähallitus, Parks and Wildlife Finland, Inari, Finland
- Department of Geology, University of Otago, Dunedin, New Zealand
- Edição: Volume 63, Nº 2 (2023)
- Páginas: 209
- Seção: Articles
- URL: https://journals.rcsi.science/0042-8752/article/view/135173
- DOI: https://doi.org/10.31857/S0042875223020157
- EDN: https://elibrary.ru/EZWRHL
- ID: 135173
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Resumo
Mixed-stock fisheries which simultaneously cause mortality amongst several populations of a species of fish may occur where separate stocks partially or completely overlap in the geographic area of harvest. This study aims to analyze the population-of-origin of adult and subadult adfluvial lacustrine brown trout Salmo trutta, exploited in a mixed-stock fishery in Upper Tuloma Reservoir in Eastern Fennoscandia, using otolith microchemistry. To evaluate the origin of migratory brown trout captured in these mixed-stock harvest fisheries, we undertook otolith sampling of brown trout juveniles in fluvial spawning and rearing habitats in the reservoir watershed, including 13 natal tributaries across the catchment of the reservoir in both Russia and Finland. Harvested adult and subadult brown trout otoliths were sampled from the impoundment in the central area of the reservoir and we analyzed for stock-related character differences to compare with known populations, using trace element signatures, with fish from the mixed stock fishery. The assignments-of-origin in the mixed-stock fishery-harvest samples did not follow the known distribution of populations sampled from natal streams in the watershed. For example, brown trout from the largest tributary catchments of Lotta River and Nota River were less represented in the mixed-harvest sample, which was contradictory to their contribution to the overall spawning and rearing areas of the catchment. These results point towards the importance of maintaining the diversity of different spawning and rearing tributaries required for brown trout recruitment into mixed stock fisheries, and the potential of the existence of population structure of brown trout in the reservoir catchment. Our information suggests that it is important to develop conservation and management strategies for natal habitats in multiple streams utilized by adfluvial lacustrine brown trout populations inhabiting various catchments and that are harvested in mixed-stock fisheries.
Sobre autores
P. Mikheev
Department of Zoology, University of Otago, Dunedin, New Zealand; Perm State University, Perm, Russia; Khabarovsk Branch of Russian Federal Research Institute of Fisheries and Oceanography, Khabarovsk, Russia
Email: pmikheev@yandex.ru
Новая Зеландия, Данидин; Россия, Пермь; Россия, Хабаровск
S. Prusov
Polar Branch of Russian Federal Research Institute of Fisheries and Oceanography, Murmansk, Russia
Email: pmikheev@yandex.ru
Россия, Мурманск
J. Erkinaro
Natural Resources Institute Finland (Luke), Oulu, Finland
Email: pmikheev@yandex.ru
Финляндия, Оулу
I. Samokhvalov
Polar Branch of Russian Federal Research Institute of Fisheries and Oceanography, Murmansk, Russia
Email: pmikheev@yandex.ru
Россия, Мурманск
S. Dolotov
Polar Branch of Russian Federal Research Institute of Fisheries and Oceanography, Murmansk, Russia
Email: pmikheev@yandex.ru
Россия, Мурманск
A. Potutkin
Polar Branch of Russian Federal Research Institute of Fisheries and Oceanography, Murmansk, Russia
Email: pmikheev@yandex.ru
Россия, Мурманск
P. Orell
Natural Resources Institute Finland (Luke), Oulu, Finland
Email: pmikheev@yandex.ru
Финляндия, Оулу
M. Seppänen
Metsähallitus, Parks and Wildlife Finland, Inari, Finland
Email: pmikheev@yandex.ru
Финляндия, Инари
I. Kopylov
Perm State University, Perm, Russia
Email: pmikheev@yandex.ru
Россия, Пермь
A. Puzik
Polar Branch of Russian Federal Research Institute of Fisheries and Oceanography, Murmansk, Russia
Email: pmikheev@yandex.ru
Россия, Мурманск
R. Easton
Department of Zoology, University of Otago, Dunedin, New Zealand
Email: pmikheev@yandex.ru
Новая Зеландия, Данидин
M. Reid
Department of Geology, University of Otago, Dunedin, New Zealand
Email: pmikheev@yandex.ru
Новая Зеландия, Данидин
G. Closs
Department of Zoology, University of Otago, Dunedin, New Zealand
Autor responsável pela correspondência
Email: pmikheev@yandex.ru
Новая Зеландия, Данидин
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