The kinematics and hydrodynamics of routine linear accelerations were studied in American eels, Anguilla rostrata, using high-speed video and particle image velocimetry. Eels were examined both during steady swimming at speeds from 0.6 to 1.9 body lengths (L) per second and during accelerations from -1.4 to 1.3 L s(-2). Multiple regression of the acceleration and steady swimming speed on the bo...

Malate oxidation supported C(2)H(2) reduction by bacteroids isolated from Sesbania rostrata stem nodules. Optimal activity reached 7.5 nanomoles per minute per milligram of dry weight and was in the same order of magnitude as that observed with succinate but always required a lower O(2) tension. Malate dehydrogenase (EC 1.1.1.37), purified 66-fold from bacteroids, actively oxidized malate (K(m)...

The redpoll finch complex Carduelis flammea-hornemanni has received much attention from taxonomists due to its remarkable variation in plumage and morphology. Some authors have suggested one highly variable species, flammea, while others have suggested seven species (see Knox 1988 for review). The most widely held view recognises two species, the common redpoll (including flammea, islandica, ro...