Breeding Distribution of the Brown Skua on Macquarie Island

1984 ◽  
Vol 84 (4) ◽  
pp. 248-249 ◽  
Author(s):  
J. Skira
Keyword(s):  
Brown Skua ◽  
Macquarie Island ◽  
Breeding Distribution

Non-breeding distribution and activity patterns in a temperate population of brown skua

2018 ◽  
Vol 603 ◽  
pp. 215-226
Author(s):  
H Schultz ◽  
RJ Hohnhold ◽  
GA Taylor ◽  
SJ Bury ◽  
T Bliss ◽  
...  
Keyword(s):  
Activity Patterns ◽  
Brown Skua ◽  
Breeding Distribution

Predation on burrowing petrels by the brown skua (Catharacta skua lönnbergi) at Mayes Island, Kerguelen

1998 ◽  
Vol 244 (3) ◽  
pp. 429-438 ◽  
Author(s):  
F. Mougeot ◽  
F. Genevois ◽  
V. Bretagnolle
Keyword(s):  
Brown Skua

How the future climate may modulate the non-breeding distribution of a Vulnerable gadfly petrel

2018 ◽  
Vol 599 ◽  
pp. 253-266
Author(s):  
L Krüger ◽  
JM Pereira ◽  
I Ramírez ◽  
JA Ramos ◽  
VH Paiva
Keyword(s):  
Future Climate ◽  
Breeding Distribution ◽  
The Future

scholarly journals Uniformity of diet composition of Brown Skua chicks at different ages and between siblings

2014 ◽  
Vol 22 (3) ◽  
pp. 265-269 ◽  
Author(s):  
Maricel Graña Grilli ◽  
Lucas J. Marti ◽  
Diego Montalti
Keyword(s):  
Diet Composition ◽  
Brown Skua ◽  
Different Ages

scholarly journals Tracking multi-generational colonization of the breeding grounds by monarch butterflies in eastern North America

2013 ◽  
Vol 280 (1768) ◽  
pp. 20131087 ◽  
Author(s):  
D. T. Tyler Flockhart ◽  
Leonard I. Wassenaar ◽  
Tara G. Martin ◽  
Keith A. Hobson ◽  
Michael B. Wunder ◽  
...  
Keyword(s):  
North America ◽  
Danaus Plexippus ◽  
Late Summer ◽  
Breeding Habitat ◽  
Eastern North America ◽  
Distribution Models ◽  
Monarch Butterflies ◽  
Breeding Distribution ◽  
Breeding Grounds ◽  
Isotope Measurements

Insect migration may involve movements over multiple breeding generations at continental scales, resulting in formidable challenges to their conservation and management. Using distribution models generated from citizen scientist occurrence data and stable-carbon and -hydrogen isotope measurements, we tracked multi-generational colonization of the breeding grounds of monarch butterflies ( Danaus plexippus ) in eastern North America. We found that monarch breeding occurrence was best modelled with geographical and climatic variables resulting in an annual breeding distribution of greater than 12 million km 2 that encompassed 99% occurrence probability. Combining occurrence models with stable isotope measurements to estimate natal origin, we show that butterflies which overwintered in Mexico came from a wide breeding distribution, including southern portions of the range. There was a clear northward progression of monarchs over successive generations from May until August when reproductive butterflies began to change direction and moved south. Fifth-generation individuals breeding in Texas in the late summer/autumn tended to originate from northern breeding areas rather than regions further south. Although the Midwest was the most productive area during the breeding season, monarchs that re-colonized the Midwest were produced largely in Texas, suggesting that conserving breeding habitat in the Midwest alone is insufficient to ensure long-term persistence of the monarch butterfly population in eastern North America.

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