Search Results

differences of the muscle-tendon complexes: a relatively high compliance of GM muscle-tendon complex enables high levels of storage of elastic energy and a high power output and velocity of plantar flexion during explosive movements, which is considered an advantage (BOBBERT et al., 1986a, b). A disadvantage

In: Netherlands Journal of Zoology

such transport against a concentration gradient energy is required, which may be derived from metabolic processes, such as glycolysis and the tricarboxylic acid cycle. Consequently, it may be expected that the enzymes, involved in these pathways, are present in the calcium- secreting cells. In short

In: Netherlands Journal of Zoology

hatching, and the amount of energy required for brain and body growth within the egg is not estimated in MARTIN'S formulation). Neither MARTIN's nor HOFMAN'S explanation holds up under fur- ther comparative scrutiny. For example, MARTIN's explanation would predict that, after controlling for body weight

In: Netherlands Journal of Zoology

also hummingbirds, can assess the costs and rewards of various floral choices; they may maximize their energy gain by approaching plants that produce large amounts of nectar or by visiting more flowers on these plants. Number of pollinator visits to flowers is an important measure for the transport of

In: Netherlands Journal of Zoology

): Inter- actions between two species of gulls No abstract received. 2. J. HERirrGn (R. D. Gulati, Limnological Institute, Nieuwersluis): Energy flow and recycling in aquatic food chains based on 14C metabolism of phytoplankton and zo6plankton 430 In six laboratory experiments zooplankton from lake

In: Netherlands Journal of Zoology

interactions are predicted to co- exist competitively. ROBINSON & WILSON (1998) argue that it is the very nature of the eurytopic specialist that ensures its co-existence with the generalist. The model accounts for the functional and behavioral capacity of fish to exploit resources that are energy rich and

In: Netherlands Journal of Zoology

production in males and females of a similar age (table I). The decrease in pheromone activity in the male may either be quan- titative or qualitative. The male, being unable to fly, remains in an area of limited size and marks a territory. Depending on the food supply, a decreasing energy investment in

In: Netherlands Journal of Zoology

for a prominent role of ACTH as a corticotropic hormone during stress is in fact rather limited, and the corticotropic function of MSH may have been underestimated. Cortisol. In fish, cortisol has been implicated in the formation and mobilization of energy substrates. It further stimulates the

In: Netherlands Journal of Zoology

& C. I. SMITH, 1993. Myotomal muscle function at different points on the body of a swimming fish. J. exp. Biol. 182: 191-206. BREDER, C. M. JR, 1926. The locomotion of fishes. Zoologica 4: 159-297. CURTIN, N. A. & R. C. WOLEDGE, 1993a. Efficiency of energy conversion during sinusoidal movement of

In: Netherlands Journal of Zoology

sluggish fishes. Qua biotope (open sea) it belongs to the active, while the relative abundance of food in the biotope permits it to live as a sprin- ter. A sprinter can be defined as a sluggish species that exhibits its maximum activity only in outbursts of energy (BODDEKE, 1971). Perhaps, the given value

In: Netherlands Journal of Zoology