Results 231 to 240 of about 28,659 (266)

Challenges in population monitoring: Bar‐tailed Godwits (Limosa lapponica) on the East Atlantic Flyway defy assumed population structure

Ibis, EarlyView.
Estimating and monitoring migratory bird populations involves significant challenges, even in the most well‐studied and easily‐counted species, and can be further complicated by long‐held but unverified assumptions and by shifting distributions in changing flyway conditions.
Jesse R. Conklin, Roeland A. Bom, Åke Lindström, Pierrick Bocher, Theunis Piersma   +4 more
wiley   +1 more source

Field‐based evidence of impaired sperm quality associated with conventional farming in two passerine birds

Ibis, EarlyView.
The detrimental effects of conventional farming on bird biodiversity are increasingly documented. Despite this, the specific impacts of both organic and conventional farming practices on bird coloration and sperm quality in natural settings remain unexplored. This study aimed to determine whether these farming practices differentially affect body mass,
Ségolène Humann‐Guilleminot, Audrey Bailly, Karine Monceau, Mélissa Desbonnes, Vincent Bretagnolle, Jérôme Moreau   +5 more
wiley   +1 more source

How much sampling is enough? Four decades of understorey bird mist‐netting across Amazonia define the minimum effort to uncover species assemblage structure

Ibis, EarlyView.
Mist‐net sampling comprises a key methodological component of assemblage‐wide avifaunal studies, particularly in the understorey of closed‐canopy tropical forests. To investigate mist‐net bird captures and species assemblage structure, we compiled data from 312 sites across the Pan‐Amazon.
Pilar L. Maia‐Braga, Anderson S. Bueno, Richard G. Davies, Marina F. A. Maximiano, Torbjørn Haugaasen, Marina Anciães, John G. Blake, Bette A. Loiselle, Sergio H. Borges, Juliana Menger, Sidnei Dantas, Ramiro D. Melinski, Fernando H. T. de Abreu, Roberta L. Boss, Carlos A. Peres   +14 more
wiley   +1 more source

A half century of monitoring reveals contrasting survival responses of Icelandic seabirds to climate and fisheries pressures

Ibis, EarlyView.
Seabirds serve as key indicators of marine environmental changes, with adult survival being a critical parameter for assessing population health. Iceland hosts some of the largest seabird populations in the North Atlantic, making it a valuable location for studying long‐term trends in seabird demographics.
Sarah E. Gutowsky, Mark L. Mallory, Gregory J. Robertson, Anna M. Calvert, David A. Fifield, Sverrir Thorstensen, Ævar Petersen   +6 more
wiley   +1 more source

Locating nests of endangered bumble bees: Lessons from field trials in northern Germany

Insect Conservation and Diversity, EarlyView.
Tracking bumble bees to find their nests using coloured strips of paper stuck to their thorax proved to be the most suitable method, while radio transponders were too heavy. Tracking times of up to 2 h and distances of up to 800 m were achieved with strips of pink craft tissue paper.
Henri Greil, Rolf Witt, Felix Klaus, Silvio Erler, Holger Buschmann   +4 more
wiley   +1 more source

Estimation of the Population Size of Street- and Venue-Based Female Sex Workers and Sexually Exploited Minors in Rwanda in 2022: 3-Source Capture-Recapture.

JMIR Public Health Surveill
Tuyishime E, Remera E, Kayitesi C, Malamba S, Sangwayire B, Habimana Kabano I, Ruisenor-Escudero H, Oluoch T, Unna Chukwu A.   +8 more
europepmc   +1 more source

Arthropod niche differentiation linked to grazing‐induced sward islets in intensively managed agricultural pasture

Insect Conservation and Diversity, EarlyView.
In a given number of samples, grassland sward islets contain more species of arthropods than the surrounding sward. When corrected for abundance, there is no difference in species richness, suggesting that the effect of islets might purely be to concentrate arthropods. The community structure differences indicated by non‐metric multidimensional scaling
Alvin J. Helden, Annette Anderson, Gordon Purvis   +2 more
wiley   +1 more source

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Capture‐recapture

American Ethnologist, 2022
ABSTRACTCapture‐recapture, a method devised for estimating wildlife population sizes using technologies like bird banding, has been repurposed for use with “rare and elusive” human populations. Capture‐recapture is implemented to count “key populations,” groups that constitute a small portion of the general population but are at high risk of HIV ...
openaire   +1 more source

Capture-Recapture Models

Journal of the American Statistical Association, 2000
Here I briefly review capture-recapture models as they apply to estimation of demographic parameters (e.g., population size, survival, recruitment, emigration, and immigration) for wild animal populations. These models are now also widely used in a variety of other applications, such as the census undercount, incidence of disease, criminality ...
openaire   +1 more source

Capture-Recapture Methods

1998
The capture-recapture methods have been long studied and applied in ecology and wildlife management [34]. In order to estimate the number of animals in a closed or open population, a sample of n 1 animals is taken from the population, the animals are marked or tagged for future identification and then returned to the population. After allowing time for
openaire   +2 more sources