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Population‐level analysis on reduction in equilibrium population size of the azuki bean beetle
Author(s) -
Tuda Midori,
Shimada Masakazu
Publication year - 1993
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/bf02513595
Subject(s) - biology , population , callosobruchus chinensis , population size , reproduction , zoology , statistics , ecology , toxicology , mathematics , demography , sociology
Summary Responses of laboratory population of the azuki bean beetle Callosobruchus chinensis to temperature conditions of 30°C and 32°C are compared. Equilibrium population size was found to be lower at 32°C. A one‐generation process examined by reproduction‐curve experiments is divided into two consecutive life stages specified by different habitats, i.e., outside and inside beans. Modified logistic difference equations are used to describe these population‐level responses at each life stages. Sensitivity analysis is used to determine parameters of importance, thus determining the main cause of the reduced equilibrium population size at 32°C. The reduction resulted from the decrease in maximum population size of emerged adults which have experienced inside‐bean process. The application and limitation of this population‐level analysis to different levels are discussed.