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Habitat fragmentation is a key driver of reduced genetic connectivity and loss of genetic variation among populations, elevating the risk of inbreeding depression and reduced adaptive potential. The black-throated finch ( Poephila cincta ) is an endemic Australian finch with two recognised subspecies, a northern ( P. c. atropygialis ) and southern form ( P. c. cincta ) separated by a biogeographic barrier in northern Australia...
Adherence to the Eatwell Guide and associations with markers of physical function: a prospective analysis within the UK Biobank cohortNARA Subscribed
The Eatwell Guide represents the UK’s principal healthy eating model and understanding whether adherence to UK dietary recommendations can attenuate age-related functional decline is essential to inform healthy ageing strategies. In up to 157,457 participants from the UK Biobank, we explored cross-sectional and prospective associations between adherence to the Eatwell Guide and markers of physical function (grip strength, fat-...
Animals regularly experience periods of food uncertainty due to seasonal changes and environmental variability. Further, the changing climate is leading to more variable weather patterns, which alter environmental conditions, and can result in resource distributions being less predictable in space and time. How animals respond to uncertain conditions, and in particular a changing distribution of food resources, remains largely...
Neurobiology of co-morbid stress and a western diet in mice: mitochondrial, proteomic and behavioral outcomesNARA Subscribed
Chronic stress (CS) and hyper-caloric diets promote affective disorders, however pathobiological interactions await definition. Neurobiological and behavioral influences of chronic stress (CS; 2 h/day restraint for 2 wks) were studied in male C57Bl/6 mice fed a control diet (CD; 12% kcal as fat/65% carbohydrate/23% protein) or Western diet (WD; 32% kcal fat/57% carbohydrate/11% protein) for 20 wks. CS induced weight loss and a...
Using pre-release efficacy as a candidate agent prioritisation tool for the weed Trichocereus spachianus (Caryophyllales: Cactaceae)NARA Subscribed
Pre-release efficacy assessments (PREA) can be used to prioritise the most damaging candidate agents for further studies in biological control programmes against invasive alien plants. This study assessed the efficacy of various potential enemies of Trichocereus spachianus (Riccob.) (Caryophyllales: Cactaceae), an invasive cactus in South Africa, in order to prioritise the most damaging candidates for further studies, includin...
Preliminary insights into manta ray (Mobula alfredi and M. birostris) population demographics and distribution in South AfricaNARA Subscribed
Both the reef manta ray, Mobula alfredi and oceanic manta ray M. birostris , are repeatedly observed in South Africa, yet little is known about the distributions of either species. In this study, we collated citizen science observations since 2003 to reveal six areas in the KwaZulu-Natal (KZN) and Eastern Cape provinces, where manta rays have been sighted across multiple years. Using their unique ventral spot patterning, 184 i...
Quantifying placebo and trial participation effects on cognitive outcome measures in aging dogsNARA Subscribed
The placebo effect, or the positive effects observed after an inert treatment which result from patients’ expectations for the therapy, is well documented in human medicine. However, in veterinary medicine, where owner’s expectations serve as a proxy for their pets, it remains underexplored, particularly for elderly dogs with cognitive decline. To address this gap, we examined 21 dogs (mean age: 12.85 years, SD: 1.46) from a p...