Results 121 to 130 of about 43,562 (319)

Host species and age‐specific variation on Hepatozoon prevalence and its effect on body condition in two Neotropical crocodiles

Wildlife Biology, EarlyView.
Many populations of species belonging to the order Crocodilia are threatened due to illegal trafficking, indiscriminate hunting, and habitat loss and degradation affecting crocodilian health and parasitic load. Although several studies have revealed that crocodiles, caimans, and alligators are frequently infected by Hepatozoon spp., the results from ...
Alfonso Marzal, Wendy Flores‐Saavedra, Sergio Magallanes, Jaime Muriel, Jefferson Lezama‐Briceño, Luis Alberto García‐Ayachi, Esteban Fong, Carlos Mora‐Rubio, Carlos Mendoza, Blanca Saldaña, Alazne Díez‐Fernández, José Martin, Carlos Marcial Perea‐Sicchar, Manuel González‐Blázquez   +13 more
wiley   +1 more source

The Polar Vortex Hypothesis: Evolving, Spectrally Distinct Polar Regions Explain Short- and Long-term Light-curve Evolution and Color–Inclination Trends in Brown Dwarfs and Giant Exoplanets

The Astrophysical Journal Letters
Recent studies revealed viewing-angle-dependent color and spectral trends in brown dwarfs, as well as long-term photometric variability (∼100 hr). The origins of these trends are yet unexplained.
Nguyen Fuda, Dániel Apai
doaj   +1 more source

Winter browsing by moose (Alces alces) in a forested mountainous landscape of west–central Sweden

Wildlife Biology, EarlyView.
Browsing ecology involving ungulates and their food resource is complex as consumption may reflect responses to various factors, such as quantity and quality of browse species. This study investigated winter browsing by moose Alces alces in a mountainous landscape of west–central Sweden, characterized by Norway spruce Picea abies production forests ...
Ella Hambeson, Ewa H. Orlikowska, Märtha Wallgren   +2 more
wiley   +1 more source

Standing Crop, Turnover, and Production Dynamics of Macrocystis pyrifera and Understory Species Hedophyllum nigripes and Neoagarum fimbriatum in High Latitude Giant Kelp Forests

Journal of Phycology, Volume 58, Issue 6, Page 773-788, December 2022., 2022
Production rates reported for canopy‐forming kelps have highlighted the potential contributions of these foundational macroalgal species to carbon cycling and sequestration on a globally relevant scale. Yet, the production dynamics of many kelp species remain poorly resolved.
Lauren E. Bell, Kristy J. Kroeker
wiley   +1 more source

An Informed and Systematic Method to Identify Variable Mid-L Dwarfs

The Astrophysical Journal
Most brown dwarfs show some level of photometric or spectral variability. However, finding the most variable dwarfs more suited for a thorough variability monitoring campaign remained a challenge until a few years ago with the design of spectral indices ...
Natalia Oliveros-Gomez, Elena Manjavacas, Daniella C. Bardalez Gagliuffi, Theodora Karalidi, Johanna M. Vos, Jacqueline K. Faherty   +5 more
doaj   +1 more source

The current population of benchmark brown dwarfs

EPJ Web of Conferences, 2011
The number of brown dwarfs (BDs) now identified tops 700. Yet our understanding of these cool objects is still lacking, and models are struggling to accurately reproduce observations.
Clarke J.R.A., Gallardo J., Gálvez-Ortiz M.C., Jones H.R.A., Zhang Z.H., Burningham B., Ruiz M.T., Day-Jones A.C., Pinfield D.J., Jenkins J.S.   +9 more
doaj   +1 more source

Climatic variation affects seasonal survival of an alpine bird species

Wildlife Biology, EarlyView.
Mountains are particularly exposed to climate change, and empirical studies have shown that montane bird species are highly sensitive to the ongoing changes. Modelling mortality risks under climatic variation will give insight into species‐specific sensitivity. Willow ptarmigan Lagopus l.
Lasse Frost Eriksen, Thor Harald Ringsby, Markus F. Israelsen, Pål F. Moa, Vidar Grøtan, Erlend B. Nilsen   +5 more
wiley   +1 more source

Diversification dynamics of chameleons (Chamaeleonidae)

Journal of Zoology, Volume 318, Issue 4, Page 241-252, December 2022., 2022
Chameleons are an iconic group of lizards, and have become a model system for studying ecological speciation and African biogeography. Here, we present the first analysis of diversification rates across the whole family and reveal a remarkably stable pattern of decreasing speciation rates over time across almost the entire evolutionary history of the ...
S. A. W. Giles, K. Arbuckle
wiley   +1 more source

Stellar evolution: Brown dwarfs and hidden mass [PDF]

, 1985
R. J. Taylor
openalex   +1 more source

Brown Dwarf Binaries [PDF]

Proceedings of the International Astronomical Union, 2011
AbstractNearly 500 brown dwarfs have been discovered in recent years. The majority of these brown dwarfs exist in the solar neighborhood, yet determining their fundamental properties (mass, age, temperature & metallicity) has proved to be quite difficult, with current estimates relying heavily on theoretical models.
openaire   +2 more sources