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Veterinary News

• Scale Effects In Species Distribution Models; Implications For Conservation Planning Und ...
  Thu, 06 November 2008
  This study presents the effect of grid size on the output of species distribution models. We found that species range distributions modelled with 50x50 km grid size selected up to 2.89 times more area than the same species modelled with 1x1 km grids. This has implications for conservation planning under climate change scen ...
• Insects Had It First: Surfactants As A Defence Against Predators
  Thu, 06 November 2008
  Surfactants are compounds that reduce the surface tension of water and thus have important functions in biological systems and in our daily lives. A surprising new role has been found for surfactants by demonstrating their contribution to the self-defence of plant-feeding insects. Threatened caterpillars regurgitate gut fl ...
• Daytime Micro-Naps In A Nocturnal Migrant: An EEG Analysis
  Thu, 06 November 2008
  Despite lost opportunity to sleep at night, nocturnal bird migrants successfully navigate the challenges of migration. Recent behavioural evidence suggests that some migrant species may compensate for lost night-time sleep during the day. The present study investigates changes in brain activity during daytime micro-naps in ...
• Mechanisms And Evolution Of Hypoxia Tolerance In Fish
  Thu, 06 November 2008
  Ever wondered why animals live where they do? The answer to this question is simply that animals live where they do, in part, because they can. The marine intertidal environment is possibly one of the nastiest places on earth with huge fluctuations in oxygen, yet a group of small benthic fishes thrive here unlike their clo ...
• Disruptive Selection In A Bimodal Population Of Darwin's Finches
  Thu, 06 November 2008
  Much of the diversity of life on earth may be the result of adaptive radiation - but this process is hard to study unless caught in the act. We studied a population of Darwin's finches in the Galapagos that shows some signs of splitting into two species. We found that birds with intermediate beak sizes have low survival du ...
• A 2,000 Km Genetic Wake Yields Evidence For Northern Glacial Refugia And Hybrid Zone Mov ...
  Thu, 06 November 2008
  Hermit and Townsend's warblers are small songbirds that interbreed where their ranges overlap in Washington and Oregon. But researchers at the University of Washington recently uncovered evidence that over time the more aggressive Townsend's has driven this hybrid zone far to the south, replacing the hermit across over a t ...
• Compensatory Investment In Zebra Finches: Females Lay Larger Eggs When Paired To Sexuall ...
  Thu, 06 November 2008
  Classically, females are expected to invest more into reproduction when paired to more attractive males. However, here we show a case of the opposite investment pattern. To understand this puzzling result, we suggest that the offspring from low quality males are more dependent on extra resources to survive. The female ther ...
• Adaptive Plasticity Of Mammalian Sperm Production In Response To Social Experience
  Thu, 06 November 2008
  This study demonstrates that the rate at which male house mice produce sperm varies according to their social environment. When males regularly encounter more potential sexual rivals, they increase their rate of sperm production. This is likely to be beneficial, because ejaculating more sperm is an effective way for males ...
• Snakebite Is A Neglected Threat To Global Public Health
  Thu, 06 November 2008
  Snakebites cause considerable death and injury worldwide and pose an important yet neglected threat to public health, says new research published in this week's PLoS Medicine. The study used the most comprehensive methods yet to estimate that at least 421,000 envenomings and 20,000 deaths from snakebites occur each ye ...
• Application Of FTIR Spectroscopic Imaging To Study Effects Of Age And Dietary L-arginine ...
  Thu, 06 November 2008
  A novel chemical imaging approach could potentially improve understanding of atherosclerosis, the arterial disease that remains the primary cause of mortality in all developed countries. Imperial College scientists studied the precise composition of the fat-rich atherosclerotic lesions, which is of key importance in unders ...