Results 121 to 130 of about 74,533 (314)

Penguins and purse-seiners : competition or co-existence?

open access: yes, 1985
Bibliography: leaves 110-124.The relationships between the pelagic purse-seine fishery and Jackass penguins (Spheniscus demersus) were investigated at Saldanha Bay, on the south-western coast of South Africa, between December 1982 and August 1983.
Broni, Stephen Christopher
core  

Bird communities and vegetation on Swedish wet meadows [PDF]

open access: yes, 2006
Wet meadows in Sweden currently depend on management by grazing to maintain habitats for various breeding and migrating birds. However, due to ceased cattle farming management by mowing could be an option for restoration and conservation of wet meadows ...
Gustafson, Tomas
core  

A detailed redescription of a skeletally immature ‘Redondasaurus’ suggests ontogenetic transformations in the taxon mirror phytosaurian morphological evolution

open access: yesThe Anatomical Record, EarlyView.
Abstract The study of morphological evolution is fundamentally tied to ontogeny, yet studies of these heterochronic processes in the fossil record are rare. Fossils belonging to an ontogenetic series are difficult to assign to an ontogenetic stage due to inconsistent proxies for skeletal ages, challenging to taxonomically assign due to morphological ...
Erika R. Goldsmith, Michelle R. Stocker
wiley   +1 more source

The density and diversity of birds on farmland in West Africa

open access: yes, 2008
The area of land farmed in Africa is predicted to double by the year 2050 yet very few African studies have investigated the impact of different farming intensities and regimes on bird communities. This study examined avian species richness and diversity
Hulme, Mark F.
core  

Skeletal pathologies in extant crocodilians as a window into the paleopathology of fossil archosaurs

open access: yesThe Anatomical Record, EarlyView.
Abstract Crocodilians, together with birds, are the only extant relatives to many extinct archosaur groups, making them highly important for interpreting paleopathological conditions in a phylogenetic disease bracketing model. Despite this, comprehensive data on osteopathologies in crocodilians remain scarce.
Alexis Cornille   +6 more
wiley   +1 more source

GABB: A global dataset of alpine breeding birds and their ecological traits. [PDF]

open access: yesSci Data, 2022
de Zwaan DR   +20 more
europepmc   +1 more source

Factors influencing the timing of breeding in a range expanding raptor at two spatial scales

open access: yes, 2012
Includes abstract.Includes bibliographical references.Range shifts and expansions have been recorded in a number of species and it is expected that as climate change proceeds it will result in more species joining this trend.
Sebele, Lovelater
core  

From fields to landscapes [PDF]

open access: yes, 2013
Farmland biodiversity has declined because of agricultural intensification. Agri-environment schemes (AESs) seem to have limited effect in stopping and reversing declines. Reasons for this lack of effect could be: (1) failure to target important habitats,
Hiron, Matthew
core  

New craniodental materials of Falcarius utahensis (Theropoda: Therizinosauria) reveal patterns of intraspecific variation and cranial evolution in early coelurosaurians

open access: yesThe Anatomical Record, EarlyView.
Abstract Despite documented ecomorphological shifts toward an herbivorous diet in several coelurosaurian lineages, the evolutionary tempo and mode of these changes remain poorly understood, hampered by sparse cranial materials for early representatives of major clades. This is particularly true for Therizinosauria, with representative crania best known
William J. Freimuth, Lindsay E. Zanno
wiley   +1 more source

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