NDLI: The anatomy of population change in a black grouse population 1992

Content Provider	Springer Nature Link
Author	Geary, Matthew Fielding, Alan H. Marsden, Stuart J.
Copyright Year	2011
Abstract	We interrogate an 18-year-long dataset containing counts of displaying male black grouse Tetrao tetrix and incidental counts of females within an 800-km2 region of Perthshire, Scotland. We examine the trends in the population and investigate how different components of the population might act as signposts of different stages of overall population change. We found statistical evidence for a decline in black grouse numbers between 1992 and 2000, and then a recovery from 2002 to 2008, but little evidence for a link between population change and weather during the decline phase. There was some evidence for a positive relationship between male and female counts. The two main components of male population size, lek size and lek frequency followed the overall population trend while it was increasing, but during the earlier decline, the two became uncoupled, to expose a complex structure within the data. During the decline, when black grouse numbers were approaching their minimum, mean lek size was actually increasing. Small leks lost proportionally more birds than did large leks, and lek longevity was positively correlated with lek size, indicating that maintenance of large leks is crucial in buffering the population against serious declines. During the decline, the spatial arrangement of leks changed, with remnant leks showing tight clustering at larger spatial scales, before expanding out to fill the large areas of unoccupied landscape during the population increase. We discuss these findings in terms of species monitoring and suggest that counts of young males may add much useful demographic information with little extra effort.
Starting Page	73
Ending Page	81
Page Count	9
File Format	PDF
ISSN	00298549
Journal	Oecologia
Volume Number	168
Issue Number	1
e-ISSN	14321939
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-07-17
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Galliformes Lek Tetrao tetrix Decline Ecology Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics

Sl.	Authority	Responsibilities	Communication Details
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
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Rapid decline of an isolated population of the black grouse Tetrao tetrix: the crisis at the southern limit of the range

Physiological costs enforce the honesty of lek display in the black grouse (Tetrao tetrix)

Rapid decline of an isolated population of the black grouse Tetrao tetrix: the crisis at the southern limit of the range

Genetic variability in European black grouse (Tetrao tetrix)

Drivers of black grouse trends in the French Alps: The prevailing contribution of climate

Combs and sexual selection in black grouse (Tetrao tetrix)

Queuing for territory positions in the lekking black grouse (Tetrao tetrix)

Increased DNA typing success for feces and feathers of capercaillie (Tetrao urogallus) and black grouse (Tetrao tetrix)

Lek site defines annual spatial use of male Black Grouse (Tetrao tetrix)

The anatomy of population change in a black grouse population 1992–2008

Similar Documents

Rapid decline of an isolated population of the black grouse Tetrao tetrix: the crisis at the southern limit of the range

Physiological costs enforce the honesty of lek display in the black grouse (Tetrao tetrix)

Rapid decline of an isolated population of the black grouse Tetrao tetrix: the crisis at the southern limit of the range

Genetic variability in European black grouse (Tetrao tetrix)

Drivers of black grouse trends in the French Alps: The prevailing contribution of climate

Combs and sexual selection in black grouse (Tetrao tetrix)

Queuing for territory positions in the lekking black grouse (Tetrao tetrix)

Increased DNA typing success for feces and feathers of capercaillie (Tetrao urogallus) and black grouse (Tetrao tetrix)

Lek site defines annual spatial use of male Black Grouse (Tetrao tetrix)

The anatomy of population change in a black grouse population 1992–2008