Výsledky vyhledávání - "Esa Hirvonen"

Akademický článek

Lakeshore areas of conservation interest: Characteristics of nursery areas of the threatened lake‐dwelling grayling, Thymallus thymallus

Autor: Topi K. Lehtonen, Esa Hirvonen, Irma Kolari, Janne Ropponen, Kristiina Nyholm, Tapio Keskinen, Teppo Vehanen

Publikováno v: Aquaculture, Fish and Fisheries, Vol 4, Iss 2, Pp n/a-n/a (2024)

Abstract Research‐based knowledge is essential for effective conservation and restoration of threatened aquatic species and habitats. Here, our aim was to gather this knowledge on the lake‐dwelling grayling (Thymallus thymallus), typically a rive

Externí odkaz: https://doaj.org/article/4700d9062ef94953b5470f5faa1b19ce

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Densité et mobilité des poissons sous la glace, sur une zone de pêche à la senne de deux lacs finlandais, par écho-intégration

Autor: Juha Lilja, Timo J. Marjomäki, Juha Jurvelius, Esa Hirvonen, Raimo Riikonen

Publikováno v: Aquatic Living Resources. 13:403-408

The density and movements of fish under ice were studied with single-beam mobile surveys and fixed location split-beam surveys, as well as exploratory fishing in winter-seining areas of two shallow Finnish lakes during winter 1999. Fish schooled near

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8c64ceeee4c5546ec62394de88791392
https://doi.org/10.1016/s0990-7440(00)01061-5

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