Results 101 to 110 of about 67,094 (276)

Spraying drones: efficacy of integrating an avian repellent with drone hazing to elicit blackbird flock dispersal and abandonment of sunflower fields

open access: yesWildlife Biology, EarlyView.
Multiple management strategies exist to combat bird damage to agriculture. We explored combining two tools, drones as frightening devices and an avian repellent, to assess effectiveness of an integrated method to deter large flocks on complex landscapes. We evaluated the ability of a spraying drone (DJI Agras MG‐1P) deploying Avian Control (i.e. active
Jessica L. Duttenhefner   +2 more
wiley   +1 more source

Direct measurement of free glucocorticoids in small volumes of mouse and rat serum using ultrafiltration and liquid chromatography-tandem mass spectrometry.

open access: yesPLoS ONE
Glucocorticoids are critical steroid hormones secreted from the adrenal glands. In mice and rats, over 90% of circulating corticosterone is bound to proteins such as corticosteroid-binding globulin and albumin, and the rest is unbound (free).
Anna Mazurenko   +2 more
doaj   +1 more source

Quantification of steroid hormones in free‐ranging Apennine wolf Canis lupus italicus hair samples collected post‐mortem

open access: yesWildlife Biology, EarlyView.
After decades of dramatic reductions in their populations, Italian wolves have begun recolonizing parts of their historic range. This growth in populations can lead to potential conflicts with human activities, which remain the main cause of wolf mortality.
Ilaria Troisio   +8 more
wiley   +1 more source

Prolonged increase of corticosterone secretion by chronic social stress does not necessarily impair immune functions [PDF]

open access: yes
The influence of a chronic social stress upon immunity was investigated in Wistar rats, submitted for four weeks to two different behavioral situations, balanced in a factorial design: housing with three females and membership rotation.
Vitiello, Sergio   +8 more
core   +2 more sources

Using programmable infusion pump in avian species – a validation methodology in geese

open access: yesWildlife Biology, EarlyView.
Wildlife face anthropogenic and natural stressors that affect their physiology and behaviour. The activity of the hypothalamic–pituitary–adrenal axis and glucocorticoid (GC) production is intrinsically linked with energy regulation and environmental stressors.
Myriam Trottier‐Paquet   +5 more
wiley   +1 more source

Correlational relationship between shock intensity and corticosterone secretion on the establishment and subsequent expression of contextual fear conditioning

open access: yes, 1998
A role for corticosterone in the consolidation of contextual fear conditioning has previously been proposed. In this study, physiological evidence was found to support this view.
Cordero, Isabel   +2 more
core   +1 more source

The Greatest Show (Birds) on Earth: Public Presentations and Their Welfare Impacts on Zoo‐Housed Birds

open access: yesZoo Biology, EarlyView.
Birds involved in bird shows were compared against non‐show birds regarding show paticipation, behaviour, body score condiiton, and feather condition. Additionally, comparisons between on and off show days as well as before and after the show were made to investigate differences in behaviour and condition. Show birds demonstrated a closer to ideal body
Bridget Cooper‐Rogers   +4 more
wiley   +1 more source

Corticosterone - an anxiogenic or an anxiolytic agent?

open access: yesJournal of Pharmacy and Pharmacology, 1979
Abstract Corticosterone (3–12 mg kg−1, i.p., giving rise to plasma corticosterone concentrations from 26.7 to 89.0 μg/100 ml) failed to have a significant anxiogenic action. Instead, corticosterone (3 mg kg−1) had a significant anxiolytic effect in the social interaction test of anxiety.
S E, File, S V, Vellucci, S, Wendlandt
openaire   +2 more sources

Vias de sinalização implicadas no efeito tipo-antidepressivo induzido pela administração aguda de creatina e cetamina em um modelo de depressão [PDF]

open access: yes, 2013
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Biológicas, Programa de Pós-Graduação em Bioquímica, Florianópolis, 2013.A creatina é um composto sintetizado endogenamente e também obtido pela dieta, intimamente ...
Pazini, Francis Leonardo
core  

Diet, phenology and body size shape nutrient release by songbirds

open access: yesFunctional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Animals can dramatically alter ecosystem structure and function through the cycling and transport of nutrients in their waste. While birds are particularly capable of influencing nutrient cycles due to their high mobility, abundance, metabolism and functional diversity,
Linsey Chen   +2 more
wiley   +1 more source

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