NDLI: Changes in landscape structure decrease mortality during migration

Content Provider	Springer Nature Link
Author	Matter, Stephen F.
Copyright Year	2006
Abstract	I examined the dispersal of the red milkweed beetle, Tetraopes tetraophthalmus, among patches of its host plant, common milkweed, Asclepias syriaca. Over a 5-year period, the number of patches in a landscape and their mean size increased, while the distance between patches decreased. Over the same period the proportion of beetles dispersing between patches increased from 0.48 to 0.62. Estimates from the virtual migration model showed that mean migration distance decreased from 158 to 72 m for male beetles and from 129 to 72 m for female beetles. Estimated mortality per migration event decreased as the landscape changed, but was low in all years. The estimated mean migration mortality per patch decreased from 1.45 × 10−2 to 3.70 × 10−7 for male beetles. Female migration mortality decreased from 5.48 × 10−3 to 3.88 × 10−6. Increasing the size and number of patches and decreasing interpatch distance decreases migration mortality and may play an important role in the conservation of species, particularly where mortality during dispersal is high.
Starting Page	8
Ending Page	16
Page Count	9
File Format	PDF
ISSN	00298549
Journal	Oecologia
Volume Number	150
Issue Number	1
e-ISSN	14321939
Language	English
Publisher	Springer-Verlag
Publisher Date	2006-07-21
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Asclepias Connectivity Dispersal Immigration Milkweed Plant Sciences Ecology
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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