Results 81 to 90 of about 4,485 (147)

History and Nature of Science enriched Problem-Based Learning on the origins of biodiversity and of continents and oceans

open access: yesMultidisciplinary Journal for Education, Social and Technological Sciences, 2014
The episode of the History of Science (HOS) on the theory of continental drift proposed by Alfred Wegener has been considered an excellent example for teaching students aspects of Nature of Science (NOS) and the relation of Science with social and ...
Cristina Sousa
doaj   +1 more source

Efectos de los atributos de la hembra de ñandú (Rhea americana) sobre la viabilidad del huevo [PDF]

open access: yes, 2019
We conducted a study throughout a breeding season in a captive-bred population of Greater rheas (Rhea americana) to evaluate the association between egg viability and the female´s body weight and age.
Bazzano, Gisela del Valle   +3 more
core  

Early-life adversity accelerates cellular ageing and affects adult inflammation: experimental evidence from the European starling [PDF]

open access: yes, 2017
Early-life adversity is associated with accelerated cellular ageing during development and increased inflammation during adulthood. However, human studies can only establish correlation, not causation, and existing experimental animal approaches alter ...
Andrews, Clare   +8 more
core   +4 more sources

A PRELIMINARY FEASIBILITY FOR ESTABLISHING A MULTI-SPECIES MEAT PROCESSING PLANT IN SOUTHWESTERN NORTH DAKOTA [PDF]

open access: yes
The number of small commodity livestock slaughter plants in the Upper Northern Plains region continues to decline. Significant factors contributing to this decline include: 1) pressure to consolidate, thereby capturing economies of scale; 2) relatively ...
Brown, Erin   +5 more
core   +1 more source

The relationship of telomere length to baseline corticosterone levels in nestlings of an altricial passerine bird in natural populations [PDF]

open access: yes, 2015
Indexación: Web of Science; Scopus.Background: Environmental stressors increase the secretion of glucocorticoids that in turn can shorten telomeres via oxidative damage.
Guerrero, C.J.   +4 more
core   +1 more source

Morphometric study of ostrich kidneys Struthio camelus Linnaeus, 1758

open access: yesActa Scientiarum: Biological Sciences
In recent years, avian medicine has advanced in the recognition of kidney diseases, but little is known about the morphology and renal morphometry of the common ostrich Struthio camelus Linnaeus, 1758.
Thais Mattos Estruc   +6 more
doaj   +1 more source

Next generation sequencing and analysis of a conserved transcriptome of New Zealand's kiwi

open access: yesBMC Evolutionary Biology, 2010
Background Kiwi is a highly distinctive, flightless and endangered ratite bird endemic to New Zealand. To understand the patterns of molecular evolution of the nuclear protein-coding genes in brown kiwi (Apteryx australis mantelli) and to determine the ...
Huynen Leon   +3 more
doaj   +1 more source

Reproductive characteristics of captive greater rhea (Rhea americana) males reared in the state of São Paulo, Brazil

open access: yesBrazilian Journal of Poultry Science, 2010
Rheas (Rhea americana) belongs to the ratite group. Considering the commercial significance of this birds, some techniques, such as semen collection, were standardized. In this study, 107 male rheas (3 to 4 years of age) reared in commercial farms in the
PAA Góes   +5 more
doaj   +1 more source

Determinación del sexo en aves [PDF]

open access: yes, 2014
Traballo fin de grao (UDC.CIE ...
González Suurbach, Sofía
core  

Parental body condition does not correlate with offspring sex-ratio in Cory's shearwater [PDF]

open access: yes, 2014
We analyzed offspring sex ratio variation in Mediterranean Cory's Shearwater (Calonectris d. diomedea) during two consecutive breeding seasons in two colonies.
Forero, Manuela G.   +5 more
core   +3 more sources

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