Premium
The Composition of Northern Pike ( Esox lucius L.) Populations in Four Shallow Waters in the Netherlands, with Special Reference to Factors Influencing 0+ Pike Biomass
Author(s) -
Grimm M. P.
Publication year - 1981
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/j.1365-2109.1981.tb00011.x
Subject(s) - pike , esox , electrofishing , fishery , biology , predation , fishing , fish measurement , ecology , abundance (ecology) , fish <actinopterygii>
The composition and abundance of Northern pike ( Esox lucius L.) populations in four shallow waters was monitored during a 4–5 year period, using mark‐recapture methods. In general, the populations were sampled by using a combination of fishing gear but pike that completed their first growing season (0+ pike) are captured quantitatively by electrofishing (3 kw, DC) exclusively. Within the length range of 0–54 cm fork length, the biomasses of 0+ pike appeared to be negatively correlated with those of larger pike. It is suggested that intraspecific predation is mainly responsible for these relations. The standing stock of <54‐cm pike was found to be determined by the amount of aquatic vegetation and more especially so if the different habitat preference of 0+ pike, 0+ < pike < 41 cm and 41 cm ≤ pike < 54 cm was taken into account.