Showing items with similar title or keywords.

• Population structure, life cycle, and trophic niche of the glacial relict amphipod, Gammaracanthus lacustris, in a large boreal lake 

  Salonen, Jouni K.; Hiltunen, Minna; Figueiredo, Kaisa; Paavilainen, Pinja; Sinisalo, Tuula; Strandberg, Ursula; Kankaala, Paula; Taskinen, Jouni (Wiley-Blackwell Publishing Ltd., 2019)

  Ecology of the glacial relict macrocrustacean Gammaracanthus lacustris, a rare inhabitant of deep Fennoscandian lakes, is poorly understood. We studied the life cycle and trophic position of this cold‐stenothermic amphipod ...

• 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, Timo J.; Valkeajärvi, Pentti; Karjalainen, Juha (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 ...

• Cost of reproduction and offspring quality in the evolution of reproductive effort 

  Oksanen, Tuula (University of Jyväskylä, 2002)

  Any organism has a limited amount of resources, which have to be partitioned among several activities such as maintenance, growth and reproduction. Reproductive effort is defined as the proportion of parental resources ...

• Daphnia invest in sexual reproduction when its relative costs are reduced 

  Gerber, Nina; Kokko, Hanna; Ebert, Dieter; Booksmythe, Isobel (The Royal Society Publishing, 2018)

  The timing of sex in facultatively sexual organisms is critical to fitness, due to the differing demographic consequences of sexual versus asexual reproduction. In addition to the costs of sex itself, an association of sex ...

• Hybridization selects for prime‐numbered life cycles in Magicicada : an individual‐based simulation model of a structured periodical cicada population 

  Toivonen, Jaakko; Fromhage, Lutz (John Wiley & Sons, 2020)

  We investigate competition between separate periodical cicada populations each possessing different life‐cycle lengths. We build an individual‐based model to simulate the cicada life cycle and allow random migrations to ...