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Mercury (Hg), and specifically methylmercury (MeHg), is a contaminant of global concern to humans and wildlife, but there is still limited understanding of its effects on many taxa. Amphibians are closely associated with water, where Hg is converted to MeHg, and high concentrations of MeHg can reduce survival of amphibians in the wild. However, limited non-lethal proxies exist for estimating MeHg bioaccumulation in amphibian l...
Influence of Plant Secondary Metabolites on intake, Detoxification Costs, and Microbial Communities in DeerNARA Subscribed
Plants available to wild herbivores, especially browsers, often contain plant secondary metabolites (PSMs). Herbivores have evolved behavioral, physiological, and microbial mechanisms for avoiding and detoxifying PSMs. The detoxification limitation hypothesis suggests that herbivores can reduce toxicity by consuming a mixture of PSMs to avoid overloading a particular detoxification pathway. Although this hypothesis has been ex...
Aim We evaluate the phylogenetic relationships and taxonomic validity of Atlantic species of Labrisomus , identifying the lineages currently assigned to L. nuchipinnis , and assessing the role of biogeographic barriers in shaping the evolutionary history and geographic distribution of the genus. Location Atlantic Ocean. Taxon Labrisomus . Methods We assembled an extensive mitochondrial and nuclear DNA dataset of Atlantic speci...
Retesting reverse-reward performance in capuchin monkeys (Sapajus apella) after 16 years: evidence of aging-related declineNARA Subscribed
In reverse-reward contingency tasks, the subject chooses between two potential rewards differing in value. To receive the higher-value reward, the subject must reach toward the lower-value reward; any reach toward the higher-value reward results in receiving the lower-value reward. In studies on animals, the rewards are usually food items differing in quantity or quality. Sixteen years after participating in reverse-reward tes...
Dissolved oxygen (DO) dynamics in estuarine ecosystems are shaped by both anthropogenic activities and climate variability, which jointly influence oxygen concentrations and overall ecosystem health. This study examined temporal and spatial variations in DO across three coastal sectors in Eastern South America. DO levels were classified as hypoxia (<2.0mgL-¹),intermediate(2.0–4.0mgL¹), and optimum (>4.0mgL-¹).Hypoxia was assoc...
Radiographic Assessment of Bone Maturation: A Tool to Estimate Sexual Maturity in Common Dolphins ( Delphinus delphis )?NARA Subscribed
Accurate inference of sexual maturity is fundamental to interpreting marine mammal life histories and population structure. Using Bayesian logistic regression models with a hierarchical ordinal (HOF‐style) parameterisation and canonical analysis of principal coordinates (CAP), we evaluate skeletal metrics in the pectoral flippers of common dolphin ( Delphinus delphis ) as indicators of attainment of sexual maturity. HOF models...
Unveiling animal death cognition: the role of social systemsNARA Subscribed
Multimorbidity as a predictor of mortality in companion dogsNARA Subscribed
Predation of Pterostichus melanarius on cocoons of soybean gall midge, Resseliella maximaNARA Subscribed
The soybean gall midge, Resseliella maxima Gagné (Diptera: Cecidomyiidae), feeds on soybean, Glycine max (L.) Merrill (Fabales: Fabaceae), causing significant injury and yield losses. Pterostichus melanarius Illiger (Coleoptera: Carabidae), a generalist predator introduced to North America, has been reported to prey on R. maxima larvae under laboratory conditions. Understanding the feeding preference of P. melanarius on differ...