Now showing items 41-50 of 84
Development of Dentalium following removal of D-quadrant blastomeres at successive cleavage stages
(Springer-Verlag, 1979-12)
Each primary micromere and macromere of the D-quadrant of Dentalium was deleted, through the mesentoblast stage, to investigate the way in which the polar lobe cytoplasm exerts its influence on development.-D and -1D embryos ...
A model describing photosynthesis in terms of gas diffusion and enzyme kinetics
(Springer-Verlag, 1971-09)
A model predicting net photosynthesis of individual plant leaves for a variety of environmental conditions has been developed. It is based on an electrical analogue describing gas diffusion from the free atmosphere to the ...
How to determine the compatibility of undirected character state trees
(Elsevier, 1979-10)
Methods for cladistic character compatibility analysis have required a priori estimates of the direction of evolutionary trends among the states of a character, in order to ensure consistency. Results are presented here ...
Roles of metabolic level and temperature regulation in the adjustment of Western plumed pigeons (Lophophaps ferruginea) to desert conditions
(Elsevier, 1973-02-01)
1. 1. Standard metabolic rate of western plumed pigeons (Lophophaps ferruginea) averages 0[middle dot]88 ml O2 (g hr)-1 during summer. This rate and the rate of evaporative water loss by these birds at 25[deg]C are well ...
Effects of olfactory experience on aggression in Mus musculus and Peromyscus maniculatus
(Elsevier, 1972-04)
Groups of Mus musculus and Peromyscus maniculatus were raised from birth either in the presence or absence of odors of the other species. In later tests of interspecific aggression it was found that individuals raised in ...
Phylogenetic relationships in the lizard family Pygopodidae: an evaluation of theory, methods and data
(University of Michigan Museum of Zoology, 1976)
Effects of activity and temperature on aerobic and anaerobic metabolism in the Galapagos marine iguana
(Springer-Verlag, 1975-12)
1 Standard and maximal levels of oxygen consumption, and lactate production during burst activity were determined in the Galapagos marine iguana, Amblyrhynchus cristatus . This semiaquatic lizard sustains vigorous activity ...
Aerobic and anaerobic metabolism during activity in the lizard Dipsosaurus dorsalis
(Springer-Verlag, 1972-09)
1. Oxygen consumption and lactate content of the lizard Dipsosaurus dorsalis were determined under standard conditions and for a bout of maximal activity induced by a 2-min period of electrical stimulation. Observations ...
Song structure, behaviour, and sequence of song types in a population of village indigobirds, Vidua chalybeata
(Elsevier, 1979-11)
Different song types are associated with certain behaviours including intrasexual aggression, mating, and initiation of song bouts. All song types are used in territorial advertisement. Songs associated with sexual and ...
Seasonal acclimatization to temperature in cardueline finches
(Springer-Verlag, 1978-06)
1. Seasonal variation in body constituents and utilization of lipid, protein, and carbohydrate during cold stress in American goldfinches were studied to determine relations of these functions to the pronounced seasonal ...