Results 51 to 60 of about 8,636 (240)

Torpor‐assisted migration: Regular use of shallow torpor reduces rest‐phase energy expenditure for songbirds during migration

Journal of Animal Ecology, EarlyView.
Migrating songbirds regularly use shallow torpor (up to 98% of birds for some species) to save energy (up to 42%) during inactive periods. This Ruby‐crowned Kinglet Corthylio calendula that was captured after a spring snowstorm highlights the value of being able to save energy when encountering unfavourable conditions.
Ryan A. C. Leys, Lily Hou, Liam P. McGuire   +2 more
wiley   +1 more source

The Landscape Genetic Signature of Pollination by Trapliners: Evidence From the Tropical Herb, Heliconia tortuosa

Frontiers in Genetics, 2019
Animal-mediated pollination is essential for the maintenance of plant reproduction, especially in tropical ecosystems, where pollination networks have been thought to have highly generalized structures.
Felipe Torres-Vanegas, Adam S. Hadley, Adam S. Hadley, Urs G. Kormann, Frank Andrew Jones, Frank Andrew Jones, Matthew G. Betts, Helene H. Wagner   +7 more
doaj   +1 more source

Improving spine‐based age estimation in centrarchid fishes using otolith‐derived training sets

Journal of Fish Biology, EarlyView.
Abstract Nonlethal age determination is a priority in fish biology contexts where sacrifice is restricted, but estimates derived from nonlethally attainable structures tend to suffer from poor precision and accuracy relative to necessarily lethal, otolith‐derived estimates.
Matthew P. Woo, Stuart E. Jones, Brian S. Ankrapp, Avi Neumann, Julián Torres‐Dowdall   +4 more
wiley   +1 more source

Phenology and reproductive ecology of Qualea parviflora (Vochysiaceae) in the Brazilian Savanna

Rodriguésia
Qualea species (Vochysiaceae) are abundant and diverse in Brazilian savanna, contributing to maintain ecological communities through interactions with animals, mainly arthropods.
Larissa Alves-de-Lima, Eduardo Soares Calixto, Marcos Lima de Oliveira, Letícia Rodrigues Novaes, Diego Vinícius Anjos Silva, Helena Maura Torezan-Silingardi   +5 more
doaj   +1 more source

Are hummingbirds generalists or specialists? Using network analysis to explore the mechanisms influencing their interaction with nectar resources.

PLoS ONE, 2019
Mutualistic interactions are powerful drivers of biodiversity on Earth that can be represented as complex interaction networks that vary in connection pattern and intensity.
Claudia I Rodríguez-Flores, Juan Francisco Ornelas, Susan Wethington, María Del Coro Arizmendi   +3 more
doaj   +1 more source

Relationship between carina size and sternum morphology in birds reflects physical constraints of body size and flight style

Journal of Anatomy, EarlyView.
Sternum morphology varies among birds and is a function of body mass and order. The area of the sternum is inversely related to the area of the keel suggesting that the increase in bone mass associated with a large keel has been mitigated by a reduction in bone mass of the sternum.
D. C. Deeming
wiley   +1 more source

The pectoralis muscle orientation as an indicator of the modes of wing‐propelled locomotion in birds

Journal of Anatomy, EarlyView.
The pectoralis orientation of birds was consistent with the orientation of the aerodynamic force acting on the wing, varying by wing‐propelled locomotion (WPL) mode. The skeletal morphology unique to each WPL mode, related to the origin/insertion of the pectoralis, may be associated with these functional demands of pectoralis orientation.
Takumi Akeda, Shin‐ichi Fujiwara
wiley   +1 more source

Welfare and Felt Duration

Noûs, EarlyView.
ABSTRACT How should we understand the duration of a pleasant or unpleasant sensation, insofar as its duration modulates how good or bad the experience is overall? Given that we seem able to distinguish between subjective and objective duration and that how well or badly someone's life goes is naturally thought of as something to be assessed from her ...
Andreas L. Mogensen
wiley   +1 more source

The Hummingbird Vol. 9 No. 11

, 2022
Expert group meeting reviews study on science, technology and innovation. -- A Hummingbird feature: Digital inclusion in Caribbean digital transformation frameworks and initiatives.

core  

The Form of Agency

Noûs, EarlyView.
ABSTRACT Philosophers often think agency is essentially connected with rationality, intention, or control. However, Minimalists argue that agency is just the power to cause a change; acids and boulders are agents too. Many philosophers treat Minimalism as a wild outlier, assuming its falsity without argument.
William Hornett
wiley   +1 more source