Management of pikeperch stocking in Lake Balaton: Effect of season, area, fish size and method of release on the rate and distribution of recaptures

A. Specziár, Béla Turcsányi

Research output: Contribution to journalArticle

Abstract

Pikeperch Sander lucioperca is an economically important fish which depleted populations need intensive management and supplemental stocking. We aimed to assess the relative influence of various pikeperch stocking strategies in Lake Balaton, Hungary, and tested 60 stocking set-ups (two seasons × three lake areas × shore vs. offshore release × five size groups) by releasing 3000 tagged yearlings. Anglers reported data of 522 recaptures within four years after stocking. Recapture rate was highest in stocking of the most productive lake area, increased with fish size, was higher in shore than offshore releases, but did not differed between stocking seasons. Fish stocked to oligotrophic areas travelled longer distances and dispersed more than those stocked to the mesotrophic area. Fish size had little effect, whereas season and method of stocking had no effect on dispersal of fish. To conclude, in pikeperch, autumn stocking with large yearlings released directly from the shore is recommended over other set-ups. Stocking quotas may be concentrated in space in low productivity areas, but should be dispersed between multiple sites in food rich areas to attain complete dispersal. This study provides a framework for testing fisheries management alternatives and behaviour of stocked fish in intensively utilized habitats.

Original languageEnglish
Article number418
JournalKnowledge and Management of Aquatic Ecosystems
Volume2017-January
Issue number418
DOIs
Publication statusPublished - Jan 1 2017

Fingerprint

Sander lucioperca
lakes
lake
fish
yearlings
methodology
fish behavior
fisheries management
Hungary
group size
distribution
effect
rate
stocking
method
autumn
fishery management
habitats
testing
productivity

Keywords

  • Angling
  • Fisheries management
  • Mark and recapture
  • Sander lucioperca
  • Stocking strategy

ASJC Scopus subject areas

  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Nature and Landscape Conservation
  • Management, Monitoring, Policy and Law

Cite this

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abstract = "Pikeperch Sander lucioperca is an economically important fish which depleted populations need intensive management and supplemental stocking. We aimed to assess the relative influence of various pikeperch stocking strategies in Lake Balaton, Hungary, and tested 60 stocking set-ups (two seasons × three lake areas × shore vs. offshore release × five size groups) by releasing 3000 tagged yearlings. Anglers reported data of 522 recaptures within four years after stocking. Recapture rate was highest in stocking of the most productive lake area, increased with fish size, was higher in shore than offshore releases, but did not differed between stocking seasons. Fish stocked to oligotrophic areas travelled longer distances and dispersed more than those stocked to the mesotrophic area. Fish size had little effect, whereas season and method of stocking had no effect on dispersal of fish. To conclude, in pikeperch, autumn stocking with large yearlings released directly from the shore is recommended over other set-ups. Stocking quotas may be concentrated in space in low productivity areas, but should be dispersed between multiple sites in food rich areas to attain complete dispersal. This study provides a framework for testing fisheries management alternatives and behaviour of stocked fish in intensively utilized habitats.",
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