Results 51 to 60 of about 498 (87)

Body Mass Records of Zoo‐Managed Rhinoceros (Ceratotherium simum, Diceros bicornis, Rhinoceros unicornis) as Compared to Field Data of Free‐Ranging Specimens

open access: yesZoo Biology, Volume 45, Issue 1, Page 74-83, January/February 2026.
Female white rhinos in zoos systematically exceed the body mass range for free‐ranging specimens; this is not the case in black rhinos. ABSTRACT The body mass of zoo animals may differ from those in wild populations due to the different environmental and dietary conditions being offered under human‐managed care.
Elisa Garand   +7 more
wiley   +1 more source

A 50‐year perspective on the use and potential of artiodactyl calcanei in bone adaptation studies

open access: yesBiological Reviews, Volume 101, Issue 1, Page 437-485, February 2026.
ABSTRACT Sheep and deer calcanei are important models for studying cortical (compact) and trabecular (cancellous) bone adaptation because they are amenable to direct strain measurement (due to lack of surrounding muscles), experience relatively simple/unidirectional bending, exhibit osteon remodelling, and have the most pronounced regional variations ...
John G. Skedros
wiley   +1 more source

Drivers of Hirola Antelope Diet Selection in Natural and Managed Habitat in Eastern Kenya

open access: yesEcology and Evolution, Volume 16, Issue 1, January 2026.
Hirola (Beatragus hunteri) populations in eastern Kenya consumed 17 forage species, favoring the grass Chloris virgata and the forbs Commelina benghalensis and C. diffusa. Nutrient analyses showed that natural habitats offered higher phosphorus, magnesium, and digestibility, whereas managed sites provided more sodium, potassium, and crude protein, with
Abdullahi H. Ali, S. Kivai
wiley   +1 more source

The star-forming environment of a ULX in NGC 4559: an optical study

open access: yes, 2004
We have studied the candidate optical counterparts and the stellar population in the star-forming complex around a bright ULX in NGC4559, using HST/WFPC2, XMM-Newton/OM, and ground-based data.
Griffiths   +6 more
core   +1 more source

Spectroscopy of Nine Cataclysmic Variable Stars

open access: yes, 2007
We present optical spectroscopy of nine cataclysmic binary stars, mostly dwarf novae, obtained primarily to determine orbital periods Porb. The stars and their periods are LX And, 0.1509743(5) d; CZ Aql, 0.2005(6) d; LU Cam, 0.1499686(4) d; GZ Cnc, 0 ...
Ann B. Kapusta   +15 more
core   +1 more source

The Extinction and Distance of Maffei 1

open access: yes, 2003
We have obtained low- and high-resolution spectra of the core of the highly-reddened elliptical galaxy Maffei 1. From these data, we have obtained the first measurement of the Mg2 index, and have measured the velocity dispersion and radial velocity with ...
Buta R. J.   +18 more
core   +1 more source

3D Simulations of Betelgeuse's Bow Shock

open access: yes, 2012
Betelgeuse, the bright, cool red supergiant in Orion, is moving supersonically relative to the local interstellar medium. The star emits a powerful stellar wind which collides with this medium, forming a cometary structure, a bow shock, pointing in the ...
Agertz   +54 more
core   +1 more source

OSO-8 X-ray observations of AM Herculis [PDF]

open access: yes
Hard X-ray observations of the binary system AM Her were coincident with soft X-ray and ground-based optical measurements. In the 2-60 KeV band, variability was detected with an eclipse during phases 0.5 to 0.7 with respect to the 0.
Boldt, E.   +4 more
core   +1 more source

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