Comparison of arterial and venous blood-gas values in anesthetized Dorset cross-bred lambs (Ovis aries) using a point-of-care analyzer.

Objective: To determine the degree of agreement between arterial and venous blood gases in anesthetized lambs using a point-of-care analyzer.

Study Design: Prospective experimental study.

Animals: A group of 12 female Dorset cross-bred lambs, weighing 37.

Light-dependent magnetoreception: quantum catches and opponency mechanisms of possible photosensitive molecules.

Dozens of experiments on magnetosensitive, migratory birds have shown that their magnetic orientation behavior depends on the spectrum of light under which they are tested. However, it is not certain whether this is due to a direct effect on the magnetoreceptive system and which photosensitive molecules may be involved. We examined 62 experiments of light-dependent magnetoreception in three crepuscular and nocturnal migrants (48 for the European robin Erithacus rubecula, ten for the silvereye Zosterops lateralis, and four on the garden warbler Sylvia borin).