1. Foraging and migration often require different energetic and movement strategies. Though not readily apparent, constraints during one phase might influence the foraging strategies observed in another. For marine birds that fly and dive, body size constraints likely present a trade-off between foraging ability and migration as smaller bodies reduce...
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of thick-billed
murres in the Bering Sea
Orben, R. A., Paredes, R., Roby, D. D., Irons, D. B
1. Foraging and migration often require different energetic and movement strategies. Though not readily apparent, constraints during one phase might influence the foraging strategies observed in another. For marine birds that fly and dive, body size constraints likely present a trade-off between foraging ability and migration as smaller bodies reduce...
AIM: Species that breed sympatrically often occupy different foraging niches to
mitigate competition for prey. When resource availability declines at the end of
the breeding season, some animals migrate to regions with more favourable
environmental conditions. When these life-history traits combine, foraging
habitat preferences may continue to influence migration patterns...
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during their non-breeding migrations
Rachael A. Orben, David B. Irons, Rosana Paredes, Daniel D
AIM: Species that breed sympatrically often occupy different foraging niches to
mitigate competition for prey. When resource availability declines at the end of
the breeding season, some animals migrate to regions with more favourable
environmental conditions. When these life-history traits combine, foraging
habitat preferences may continue to influence migration patterns...
Full Text:
migrations
Orben, R. A., Irons, D. B., Paredes, R., Roby, D. D., Phillips, R. A., & Shaffer, S.
A. (2015
We hypothesized that changes in southeastern Bering Sea foraging conditions for black-legged kittiwakes (Rissa tridactyla)
have caused shifts in habitat use with direct implications for population trends. To test this, we compared at-sea
distribution, breeding performance, and nutritional stress of kittiwakes in three years (2008–2010) at two sites in the...
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no use of basin habitats given that this prey is only
obtained in the basin (Paredes et al. 2012
We hypothesized that changes in southeastern Bering Sea foraging conditions for black-legged kittiwakes (Rissa tridactyla)
have caused shifts in habitat use with direct implications for population trends. To test this, we compared at-sea
distribution, breeding performance, and nutritional stress of kittiwakes in three years (2008–2010) at two sites in the...
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-Legged Kittiwakes to Prolonged
Food-Shortages around Colonies on the Bering Sea Shelf
Paredes R, Orben
Clostridium perfringens type A isolates produce the spore-specific enterotoxin, CPE, upon sporulation in the gastrointestinal tract of humans and animals. Spo0A is a response regulator representing the major transcription factor for sporulation initiation in C. perfringens. In Bacillus subtilis, a multicomponent phosphorelay involving five histidine kinases (KinA-KinE), the intermediate response...
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)
Acknowledgments
The Sarker Lab:
Dr. Mahfuzur Sarker
I-hsiu Huang
Dr. Deepa Raju
DanielParedes-Sabja
Nahid
Comparative phylogeography offers a unique opportunity to understand the interplay between past environmental events and life-history traits on diversification of unrelated but co-distributed species. Here, we examined the effects of the quaternary climate fluctuations and palaeomarine currents and present-day marine currents on the extant patterns of genetic diversity in the...
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) program (Grant # U915985) to
ERO. Thanks to E. Bandou, B. Degen, C. Proisy (French
Guiana), Daniel
In response to genotoxic stress, ATR and ATM kinases phosphorylate H2A in fungi and H2AX in animals on a C-terminal serine.
The resulting modified histone, called γH2A, recruits chromatin-binding proteins that stabilize stalled replication forks or promote
DNA double-strand-break repair. To identify genomic loci that might be prone to replication...