Lifting the Vendace, Coregonus albula, on the Life Table : Survival, Growth and Reproduction in Different Life-Stages during Very High and Low Abundance Regimes
Marjomäki, T. J., Valkeajärvi, P., & Karjalainen, J. (2021). Lifting the Vendace, Coregonus albula, on the Life Table : Survival, Growth and Reproduction in Different Life-Stages during Very High and Low Abundance Regimes. Annales Zoologici Fennici, 58(4-6), 177-189. https://doi.org/10.5735/086.058.0406
Published inAnnales Zoologici Fennici
© Finnish Zoological and Botanical Publishing Board, 2021
We analyzed the variability in vendace population parameters in the context of a life table. Parameters related to growth, fecundity and survival were estimated for post-recruitment (age > 1 growing season) life stages of Lake Southern Konnevesi vendace in both very high and low population abundance regimes. Pre-recruitment survival producing population stability was then determined. We found a very strong compensatory density dependence in growth, fecundity and survival: during low abundance, a lifetime reproductive output of a female was almost 20 times that of the abundant regime. To maintain the low abundance regime, pre-recruitment survival must counterbalance it by decreasing to a very low level. Potential drivers of high variability in pre-recruit survival and potential for depensation, Allee effect, are discussed, as well as the implications of the results on fisheries management and risk of extinction due to anthropogenic stressors such as global warming or extensive predator stocking. ...
PublisherFinnish Zoological and Botanical Publishing Board
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Recruitment variability in vendace, Coregonus albula (L.), and its consequences for vendace harvesting Marjomäki, Timo J. (Jyväskylän yliopisto, 2003)Timo Marjomäki tutkii väitöskirjassaan muikun rekryyttimäärän (=vuosiluokan runsaus ensimmäisen elinvuoden syksyllä tai talvella) vuosien välisen runsaudenvaihtelun ominaispiirteitä ja syitä sekä tarkasteli vaihtelun ...
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