Results 11 to 20 of about 2,394 (135)

Global analysis of annual survival among shorebirds reveals a negative effect of migration distance and a decline in recent decades

Oikos, EarlyView.
Annual survival is a key demographic parameter driving population trends in wildlife populations. However, despite numerous species‐specific or regional studies, global reviews of the factors affecting the survival of declining taxa remain scarce. Here, we investigated annual survival of fledged immature and adult shorebirds, a globally‐distributed and
Guillaume Dillenseger, Christopher H. J. Sparkes, Tamás Székely, Brett K. Sandercock, Robert P. Freckleton, Vojtěch Kubelka   +5 more
wiley   +1 more source

Mapping arboretum research: Trends, gaps, and opportunities for biodiversity conservation, society, and climate resilience

PLANTS, PEOPLE, PLANET, EarlyView.
Arboreta bridge people and nature while conserving tree biodiversity, supporting climate resilience, and advancing environmental education. This study maps over a century of available and indexed arboretum research, uncovering trends, knowledge gaps, and opportunities for collaboration.
Catarina Patoilo Teixeira, Vítor Ramalhosa Ferreira   +1 more
wiley   +1 more source

Rhyming in the cold: first evidence of soniferous fishes in the Southern Ocean

Remote Sensing in Ecology and Conservation, EarlyView.
The acoustic ecology of Southern Ocean fishes remains unknown due to a lack of dedicated acoustic research on the fishes of this ocean. Passive acoustic monitoring data were collected at the South African sub‐Antarctic Prince Edward Islands using an underwater acoustic recorder, and towed underwater Ski‐Monkey cameras were deployed to identify fish ...
Fannie W. Shabangu, Grant van der Heever, Charles von der Meden, Hannah Truter, Stephen J. Lamberth, Ofer Gon   +5 more
wiley   +1 more source

Livestock sector in sub-Saharan Africa, from the independences to 2020. II. Exchanges approached by subregional zones

Revue d’Elevage et de Médecine Vétérinaire des Pays Tropicaux, 2000
Sub-Saharan Africa was zoned into seven subregions (West, Center-West, Center-North, East, Center, South, and Madagascar) in order to specify its great exchange and consumption diversity.
G. Tacher, L. Letenneur
doaj   +1 more source

Tracking Wintertime Behaviour of Emperor Penguins Using High‐Resolution Synthetic Aperture Radar Imagery

Remote Sensing in Ecology and Conservation, EarlyView.
Using 25–30 cm Umbra synthetic aperture radar (SAR) imagery combined with ground validation of our observations, we introduce a method to track the phenology of emperor penguins during the Antarctic winter. We successfully identified events in the breeding cycle, which were previously impossible to observe during the complete darkness of Antarctic ...
Michelle LaRue, Daniel Price, Sarah Wiki‐Bennett, Charles K. Lee, B. Jack Pan, Kyle McCloud, Heather Cruickshank, Alex Ponniah, Daniel Zitterbart, Alexander Winterl, Céline Le Bohec, Rose Foster‐Dyer, Peter Fretwell   +12 more
wiley   +1 more source

Fear or feast: small mammal activity increases in the presence of carcasses despite increased threat of predation by black‐backed jackals

Wildlife Biology, EarlyView.
Food acquisition is arguably the most important, and among the riskiest behaviours for most mammals. Carcasses are an ephemeral resource for many scavengers, particularly black‐backed jackals Lupulella mesomelas that prey on small mammals. Landscape of fear theory suggests that prey species should reduce their activity in areas of high predator ...
Haemish I. A. S. Melville, W. Maartin Strauss   +1 more
wiley   +1 more source

Overlap of nonbreeding wandering albatrosses with fisheries and implications for colony‐specific population trajectories at South Georgia

Conservation Biology, EarlyView.
Abstract Bycatch in fisheries is one of the most serious threats to pelagic seabirds, causing major population declines. Mitigation measures can reduce bycatch substantially, but many fisheries fail to apply best practices, and seabird mortality remains high.
V. Warwick‐Evans, E. J. Pearmain, R. A. Phillips   +2 more
wiley   +1 more source

Informing elephant management through demographic snapshots

Conservation Science and Practice, EarlyView.
Understanding demography is vital for managing species successfully; however, for elephants, traditional surveys are both costly and labor‐intensive. This study presents a cost‐effective method for estimating age structures of savannah elephants in southern Africa, revealing how water provisioning, density dependence, and fertility control influence ...
Ryan M. Huang, Stuart L. Pimm, Cornelius J. Louw, Robert A. R. Guldemond   +3 more
wiley   +1 more source

A positivação do Ubuntu como um princípio jurídico e político-constitucional da África

Trans/Form/Ação
A expressão Ubuntu é apresentada muitas vezes como uma mera cosmovisão ontológica, filosófica africana. Entretanto, este artigo tem objetivo de equiparar a filosofia Ubuntu como uma categoria de princípios jurídicos abertos de natureza constitucional ...
Arménio Alberto Rodrigues Da Roda
doaj   +1 more source

Neoliberalism’s legacy in Southern Africa: the economic and social impact of adjustment [PDF]

Revista CIDOB d'Afers Internacionals, 2003
This article seeks to provide a better understanding of the problems involved in the processes of economic liberalization undertaken in Africa, specifically in the various economies of Southern Africa, over the last two decades through the application of
Eduardo Bidaurrazaga Aurre
doaj