NDLI: Biases in the estimation of spatial egg aggregation and association based on emergence data

Content Provider	Springer Nature Link
Author	Takahashi, Kazuo H.
Copyright Year	2006
Abstract	Spatial aggregation and association of conspecific and allospecific eggs over resource patches have often been estimated based on emergence data. However, intra-specific competition reduces the number of emergents of conspecifics, and inter-specific competition reduces the number of emergents of allospecifics, causing biases in the estimation of spatial distribution of eggs using emergence data. The present study investigated, by laboratory experiments using drosophilids and simulation models, how the use of emergence data causes such biases. In the laboratory experiments, females were allowed to oviposit over resource patches, and spatial aggregation and association of eggs were examined. The number of emergents from each resource patch was then estimated from the density-survival relationship, and spatial aggregation and association of emerging adults thus estimated were compared with those of eggs. In the simulation models, the spatial distributions of adults emerging from eggs that varied in their degree of spatial aggregation were evaluated under different intensities of intra- and/or inter-specific competition. Both laboratory experiments and simulations indicate that the use of emergence data always causes an underestimation of spatial aggregation and association of eggs. Relaxation of intra- and inter-specific competition by addition of extra resources would improve the estimation of spatial egg distribution based on emergence data.
Starting Page	459
Ending Page	466
Page Count	8
File Format	PDF
ISSN	09123814
Journal	Ecological Research
Volume Number	22
Issue Number	3
e-ISSN	14401703
Language	English
Publisher	Springer-Verlag
Publisher Date	2006-08-30
Publisher Place	Tokyo
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Aggregation model Drosophila Inter-specific competition Intra-specific competition Patchy resource Forestry Behavioural Sciences Evolutionary Biology Zoology Plant Sciences Ecology
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics

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