Results 21 to 30 of about 2,135,400 (251)

Actualización sobre la distribución y tamaño poblacional del buitre leonado Gyps fulvus en Gipuzkoa: censo de 2023 [PDF]

open access: yesMunibe Ciencias Naturales
La actualización sobre la distribución y tamaño de poblaciones es fundamental para evaluar el estado de conservación de las especies, así como aplicar, en su caso, medidas de gestión orientadas a mantener o devolver a las mismas a un estado favorable ...
Mikel Olano   +5 more
doaj   +1 more source

Decline of one of the southernmost northern elephant seal (Mirounga angustirostris) colonies and its relationship with a warm sea environment

open access: yesCiencias Marinas, 2023
Over several decades, air temperature and sea surface temperature (SST) have increased in the northeastern Pacific, as has the frequency of large-scale warm anomalies in SST. The objective of this study was to evaluate the impact of these warm anomalies
Eunice Donají Rodríguez-Rafael   +3 more
doaj   +1 more source

Population and trends in the global mean temperature [PDF]

open access: yes, 2016
The Fisher Ideal index, developed to measure price inflation, is applied to define a population-weighted temperature trend. This method has the advantages that the trend is representative for the population distribution throughout the sample but without ...
Tol, Richard S J
core   +3 more sources

Decline in Distribution and Abundance: Urban Hedgehogs under Pressure

open access: yesAnimals, 2020
Increasing urbanization and densification are two of the largest global threats to biodiversity. However, certain species thrive in urban spaces. Hedgehogs Erinaceus europaeus have been found in higher densities in green areas of settlements as compared ...
Anouk L. Taucher   +5 more
doaj   +1 more source

Using eBird data to model population change of migratory bird species

open access: yesAvian Conservation and Ecology, 2017
Citizen science projects provide a vast amount of biological data that can be used to model population trends of species. Robust statistical modeling techniques are necessary to account for multiple sources of bias inherent to the data.
Jacob Walker, Philip D. Taylor
doaj   +1 more source

Winter Habitat Associations of Blackbirds and Starlings Wintering in the South-Central United States

open access: yesHuman-Wildlife Interactions, 2017
Birds can cause extensive crop damage in the United States. In some regions, depredating species comprise a substantial portion of the total avian population, emphasizing their importance both economically and ecologically.
Matthew Strassburg   +3 more
doaj   +1 more source

Is the hangul Cervus hanglu hanglu in Kashmir drifting towards extinction? Evidence from 19 years of monitoring

open access: yesOryx, 2023
The Tarim red deer Cervus hanglu has been recently recognized as a separate deer species with populations in China, Central Asia and Kashmir. These populations are few, isolated and at risk of extinction. The documented range of the Kashmir population of
Khursheed Ahmad   +6 more
doaj   +1 more source

Establishing large mammal population trends from heterogeneous count data

open access: yesEcology and Evolution
Monitoring population trends is pivotal to effective wildlife conservation and management. However, wildlife managers often face many challenges when analyzing time series of census data due to heterogeneities in sampling methodology, strategy, or ...
R. Pradel   +8 more
doaj   +1 more source

Analysis of a 131-year longitudinal dataset of the Eurasian otter Lutra lutra in Hong Kong: implications for conservation

open access: yesOryx
Hong Kong is one of the busiest metropolises, and the Eurasian otter Lutra lutra is one of its most threatened species. We collected published data for 1890–2020 to document changes in local otter abundance and distribution over time.
Michael Ka Yiu Hui, Bosco Pui Lok Chan
doaj   +1 more source

Tuberculosis in Malta : thirty-five years of epidemiological trends in the native population [PDF]

open access: yes, 2015
Malta, the smallest island state in Europe, with an approximate population of 400,000, has one of the lowest reported incidence rates for tuberculosis (TB) in its native-born population.1 Long- term trends for TB among this population were investigated.
Ahmed, Wafaa   +4 more
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