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Univoltine and bivoltine life cycles in insects: A model with density‐dependent selection
Author(s) -
Sota Teiji
Publication year - 1988
Publication title -
population ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 59
eISSN - 1438-390X
pISSN - 1438-3896
DOI - 10.1007/bf02512608
Subject(s) - voltinism , biology , population , selection (genetic algorithm) , ecology , population density , diapause , statistics , demography , mathematics , larva , computer science , artificial intelligence , sociology
Summary Selection for univoltine and bivoltine life cycles in insects under resource‐limited but favourable temperature conditions is analyzed with a difference equation model including density‐dependent population dynamics based on the conceptual framework of an evolutionarily stable strategy. The model predicts that the bivoltine type can spread in a univoltine population when the fraction of density‐independent rate of annual increase by producing a second generation exceeds the survival rate during diapause of the univoltine type, but monopoly of the bivoltine type is not possible unless it attains an equilibrium population density exceeding that of the univoltine type. The applicability of the model prediction in explaining the occurrence of a partial bivoltine cycle in predominantly univoltine population in the temperate zones is discussed.