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Influence of seasonal light conditions on the physiology of Antarctic krill Euphausia superba [Elektronische Ressource] : implications for over-winter biology and maturity development / Mathias Teschke

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Universität Bremen — Alfred Wegener Institut für Polar- und Meeresforschung INFLUENCE OF SEASONAL LIGHT CONDITIONS ON THE PHYSIOLOGY OF ANTARCTIC KRILL, EUPHAUSIA SUPERBA IMPLICATIONS FOR OVER-WINTER BIOLOGY AND MATURITY DEVELOPMENTDISSERTATION zur Erlangung des Doktorgrades der Naturwissenschaften (Dr. rer. nat.) am Fachbereich Biologie/Chemie der Universität Bremen MATHIAS TESCHKE Bremen 2007 Betreuung: Dr. Bettina Meyer 1. Gutachter: Prof. Dr. U. Bathmann 2.Dr. W. Hagen Image copyright © Scholastic „The krill is a creature of delicate and feathery beauty, reddish brown and glassily transparent. It swims with that curiously intent purposefulness peculiar to shrimps, all its feelers alert for a touch, tremulously sensitive, its protruding bleck eyes set forward like lamps. It moves forward slowly, deliberately, with its feathery limbs working in rhythm and, at a touch of its feelers, shoots backwards with stupefying rapidity to begin its cautious forward progress once again” Ommanney 1938, cited in Marr 1962 p. 156 TABLE OF CONTENTS GENERAL INTRODUCTION............................................................................................................... 1 KRILL ADAPTATIONS TO ITS HIGHLY SEASONAL ENVIRONMENT .................................. 4 THE POTENTIAL ROLE OF LIGHT IN THE SEASONAL LIFE CYCLE OF KRILL ................. 7 OUTLINE OF THIS THESIS..................................................................................

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Published 01 January 2007
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Language English