Neurophysiological correlates of stereotypic behaviour in a model carnivore species.

Neurophysiological correlates of stereotypic behaviour in a model carnivore species. Behav Brain Res. 2019 Jul 06;:112056 Authors: Díez-León M, Kitchenham L, Duprey R, Bailey CDC, Choleris E, Lewis M, Mason G Abstract Stereotypic behaviour (SB) is common in animals housed in farm, zoo or laboratory conditions, including captive Carnivora (e.g. wild ursids and felids). Neurobiological data on housing-induced SBs come from four species (macaques, two mouse species, and horses), and suggest basal ganglia (BG) dysfunction. We investigated whether similar patterns occur in Carnivora via a model, American mink, because their SB is distinctive in form and timing. We raised 32 males in non-enriched (NE) or enriched (E) cages for 2 years, and assessed two forms of SB : 1) Carnivora-typical locomotor-and-whole-body ('loco') SBs (e.g. pacing, weaving); 2) scrabbling with the forepaws. Neuronal activity was analysed via cytochrome oxidase (CO) staining of the dorsal striatum (caudate; putamen), globus pallidus (externus, GPe; internus, GPi), STN, and nucleus accumbens (NAc); and the GPe:GPi ratio (GPr) calculated to assess relative activation of direct and indirect pathways. NE mink stereotyped more, and had lower GPr CO-staining indicating relatively lower indirect pathway activation. However, no single BG area was affected by housing; and nor did GPr values covary with SB. Independent of housing, elevated NAc CO-staining predicted more loco SB; while...
Source: Behavioural Brain Research - Category: Neurology Authors: Tags: Behav Brain Res Source Type: research

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In this study, we genetically characterised Monogenea found on the gill of common carp in Iran. In total, 5603 parasites were recovered from 112 fish. The parasites were first identified morphologically as Dactylogyrus extensus, D. anchoratus, D. vastator, D. minutus, D. achmerowi and Gyrodactylus sprostonae. Representative samples were then subjected to sequencing. This is one of the first studies which has provided both morphological and sequence data for Dactylogyrus spp. and G. sprostonae. Our findings provide a foundation for future research into the genetic make-up of these economically significant parasites and the ...
Source: Parasitology International - Category: Parasitology Source Type: research
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Source: Advances in Virus Research - Category: Virology Source Type: research
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Source: A Journal of Comparative Zoology - Category: Zoology Source Type: research
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Source: Small Ruminant Research - Category: Zoology Source Type: research
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Source: Research in Veterinary Science - Category: Veterinary Research Source Type: research
The objective of the study was to (1) characterize and compare the chemical composition at the surface, subsurface and in the bulk of thin plastic films used for portosystemic shunt attenuation in their native state and after plasma exposure. (2) Assess the presence, concentration and location of irritant compounds (e.g dicetyl phosphate) within the films.Attenuated Total Reflectance Infrared Spectroscopy (ATR-IR), X-ray Photoelectron Spectroscopy (XPS) and dynamic Time-of-Flight Secondary Ion Mass Spectrometry (ToF-SIMS) were used to analyze thirteen thin plastic films. Sample thickness was visualized and measured using S...
Source: Research in Veterinary Science - Category: Veterinary Research Source Type: research
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Source: African Journal of Microbiology Research - Category: Microbiology Source Type: research
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Source: Journal of Microbiological Methods - Category: Microbiology Source Type: research
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Source: Journal of Microbiological Methods - Category: Microbiology Source Type: research
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