ADAPTATIONS IN THE LIPID AND ENERGY METABOLISM OF PARASITIC HELMINTHS by JOS F. H. M. BROUWERS, JAAP J. VAN HELLEMOND and ALOYSIUS G. M. TIELENS (Laboratory of Veterinary Biochemistry, Utrecht University, The Netherlands) ABSTRACT Parasitic helminths share many interesting features in their

In: Netherlands Journal of Zoology

FEEDING, DIGESTION AND OXYGEN CONSUMPTION IN DAPHNIA MAGNA A STUDY IN ENERGY BUDGETS by E. G. EVERS and S. A. L. M. KOOIJMAN (Biological Laboratory, Free University, P. O. Box 7161, 1007 MC Amsterdam, The Netherlands) SUMMARY The feeding behaviour of Daphnia magna was investigated using

In: Netherlands Journal of Zoology

OPTIMIZATION OF MUSCLES AND MOVEMENT FOR PERFORMANCE OR ECONOMY OF ENERGY by R. MCNEILL ALEXANDER (School of Biology, University of Leeds, Leeds LS2 9JT, UK) ABSTRACT This paper shows by a series of examples how the muscles and movements of humans and animals seem to be designed, in some cases

In: Netherlands Journal of Zoology

INFLUENCE OF HYPOXIA EXPOSURE ON THE ENERGY METABOLISM OF COMMON CARP (CYPRINUS CARPIO L.) by VINCENT J.T. VAN GINNEKEN1, PATRICIA VAN CAUBERGH1, MAAIKE NIEVEEN1, PAUL BALM2, GUIDO VAN DEN THILLART1 and ALBERT ADDINK1 (1Animal Physiology, Institute of Evolutionary and Ecological Sciences (EEW

In: Netherlands Journal of Zoology

ZOOPLANKTON FEEDING IN COMMON BREAM (ABRAMIS BRAMA), WHITE BREAM (BLICCA BJOERKNA) AND ROACH (RUTILUS RUTILUS): EXPERIMENTS, MODELS AND ENERGY INTAKE by COEN VAN DEN BERG, JOS G. M. VAN DEN BOOGAART, FERDINAND A. SIBBING and JAN W. M. OSSE (Department of Experimental Animal Morphology and Cell

In: Netherlands Journal of Zoology

Western Australia . 1:250 000 Geological Series – Explanatory Notes. Department of Resources & Energy . Holsinger J.R. ( 1988 ) Troglobites: the evolution of cave-dwelling organisms . Am. Sci. , 76 , 147 – 153 . Holsinger J.R. , Carlson K.R. & Shaw D

In: Contributions to Zoology

on current energy reserves and the optimal solution is found by maximizing expected lifetime reproductive success. By varying the value of parameters in the model I investigate how activity rhythms may be expected to change with different ecological or physiological circumstances. The new formulation

In: Netherlands Journal of Zoology

gives some support to the head while allowing it to be lowered to the ground for feeding. Tendons in the distal parts of the legs of mammals save energy by stretching and recoiling in each step, enabling the animal to bounce along like a child on a pogo-stick. The same tendons aid jump- ing by recoiling

In: Netherlands Journal of Zoology

of the transitions may not take place, either because the concentration of the components is too low, or the activation energy of the transition is too high. Y may dis- sociate very fast from the complex LRY, by which dissociation of L from LRY may be neglectible. The transition of RX to RY may not

In: Netherlands Journal of Zoology

.wiersma@biol.rug.nl ) ABSTRACT We measured energy expenditure in free-living great tits ( Parus major ) during the active (day) and the inactive period (night) with the aim of determining whether great tits compensate for energy costs made during periods of high activity in periods of low activity. If such compensation occurs

In: Netherlands Journal of Zoology