Get A Functional Biology of Sticklebacks PDF

By R. J. Wootton (auth.)

ISBN-10: 1461585139

ISBN-13: 9781461585138

ISBN-10: 1461585155

ISBN-13: 9781461585152

General Editor: Peter Calow, division of Zoology, collage of Sheffield, England the most target of this sequence may be to demonstrate and to give an explanation for the best way organisms 'make a residing' in nature. on the middle of this - their func­ tional biology - is the best way organisms gather after which utilize assets in metabolism, move, progress, copy, etc. those strategies will shape the elemental framework of the entire books within the sequence. each one booklet will pay attention to a selected taxon (species, relations, classification or maybe phylum) and may compile informa­ tion at the shape, body structure, ecology and evolutionary biology of the gang. the purpose should be not just to explain how organisms paintings, but in addition to contemplate why they've got come to paintings in that means. by means of con­ centrating on taxa that are renowned, it really is was hoping that the sequence won't purely illustrate the good fortune of choice, but additionally convey the limitations imposed upon it through the physiological, morphological and increase­ psychological barriers of the teams. one other vital function of the sequence could be its organismic orien­ tation. each one publication will emphasise the significance offunctional integra­ tion within the day by day lives and the evolution of organisms. this can be the most important on account that, notwithstanding it can be precise that organisms should be regarded as collections of gene-determined characteristics, they however have interaction with their surroundings as built-in wholes and it's during this context that specific features were subjected to typical choice and feature evolved.

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Additional resources for A Functional Biology of Sticklebacks

Sample text

Continuous Line, First Prey; Broken Line, Sixth Prey. After Kislalioglu and Gibson (1976a) In both field and laboratory observations of S. spinachia feeding on mysids, there was a positive correlation between prey size and fish size. Experimental studies suggested that the correlation found in the field studies arose because fish of a given size had a preferred size range of prey, and different-sized prey had different swimming speeds and escape responses. As fish became< satiated, they became more size-selective (Kislalioglu and Gibson, 1975).

The fish also preferred to attack the periphery of the swarm, particularly if the swarm was of equal density throughout. As the rate of attacking dropped, the fish tended to switch its attacks to the less dense regions of the swarm, although the preference for attacking the periphery was still maintained. Overall, the periphery of the swarm received more attacks than the centre, but fewer than stragglers from the swarm. Stragglers were defmed as two Daphnia separated by one empty tube from the other tubes containing Daphnia.

There was a critical density above which the low density (two Daphnia) was attacked mOre frequently than the higher density. As the distance between the pairs of tubes was increased, the number of first attacks directed at the two decreased although the Feeding 41 total number of attacks on the two remained virtually constant. When the colour of the two and 40 Daphnia made them less conspicuous against the background, the preference for the two Daphnia decreased. This suggests that conspicuous stragglers are most at risk from stickleback predation.

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A Functional Biology of Sticklebacks by R. J. Wootton (auth.)


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