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182 Conclusion Comme tout comportement, le déplacement des larves est une réponse motrice à un stimulus sensoriel. Les dix dernières années ont amené leur lot d’étonnement, et même d’incrédulité, face à la découverte des capacités motrices extraordinaires des larves de poissons 25 . De même, il est probable que nous ne fassions qu’effleurer leurs capacités sensorielles à l’heure actuelle. Le développement des recherches tentant d’expliquer comment les larves sont capables de retourner précisément à leur lieu de naissance après un épisode pélagique de plusieurs semaines 41,42 promet d’être plein de surprises.
Appendix A Undescribed Chaetodonthidae Two specimen of a quite odd looking larva were captured on two different occasions during the cruise around Tetiaroa, at several days interval (see chapter 4 for details regarding sampling strategy). Both are advanced stages and were identified as Chaetodontids due to the bony head plates characteristic of the tholichthys stage of this family. They are otherwise characterised by particularly long supra-ocular ridges, horn-like, which protrude forward. In other species where those ridges are extended, they are rather oriented perpendicular to the body, or backward. Such “longhorn” specimen were already captured in French Polynesia, around the atoll of Mururoa in 1977. A technical report of the ORSTOM 318 contains a picture of at least four specimen, but they were erroneously identified as Heniochus sp. and were not described. Those specimen are nowhere to be found today. Both specimen were photographed still alive, straight out of the nets, onboard the ship. These pictures of somewhat low quality allow to see their real colours (Figures A.1 and A.4). Several months after being fixed in formalin, high quality photographs were taken by David G. Johnson in the National Museum of Natural History, Washington (Figure A.2, A.3, and A.5). Both specimen are now stored in 90% ethanol. Morphometric measurements were performed on high resolution side-view photographs, with the software ImageJ. Meristic counts were performed on fixed specimen and on the same photographs (Table A.1). 183
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À mon étoile.
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vi Résumé La plupart des organism
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viii Abstract Most demersal marine
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x Table des matières 1.3.3 Simple
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xii Table des matières 6.2.3 Examp
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xiv Liste des figures 4.6 Distribut
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Liste des tableaux 1.1 Potential or
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2 Introduction La survie des larves
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4 Introduction Limitation par le re
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6 Introduction Les courants déterm
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8 Introduction où m est le taux de
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10 Introduction biologique simple.
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12 Introduction Le milieu lui-même
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14 Introduction Figure I.6 Schémat
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16 Introduction obstacles technique
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18 Introduction Figure I.8 Prédict
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20 Introduction I.5 La biologie des
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22 Introduction du fonctionnement d
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24 Introduction L’objectif de cet
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26 Behaviour in models 1.1 Introduc
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28 Behaviour in models Using mean p
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30 Behaviour in models 1.3 Vertical
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32 Behaviour in models . . . bring
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34 Behaviour in models of measured
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36 Behaviour in models Additive dis
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38 Behaviour in models In situ stud
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40 Behaviour in models Operational
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42 Behaviour in models Effects on p
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44 Behaviour in models begins is no
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46 Behaviour in models 1.10 Conclus
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48 Larvae orientation in situ Diver
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50 Larvae orientation in situ . . .
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52 Larvae orientation in situ optio
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54 Larvae orientation in situ if >
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56 Larvae orientation in situ Table
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58 Larvae orientation in situ that
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60 Larvae orientation in situ 2.A A
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62 Behaviour of settling fishes at
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Chapter 4 Biophysical correlates in
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Methods 71 4.2 Methods 4.2.1 Sampli
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Methods 73 Three rotations were com
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Methods 75 test really focuses on w
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Results 77 Figure 4.3 Mean of insta
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Results 79 Figure 4.5 Perspective v
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Results 81 Table 4.1 Abundances of
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Results 83 Figure 4.8 Distribution
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Results 85 Figure 4.10 Concentratio
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Discussion 87 Figure 4.11 Compariso
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Discussion 89 But the most likely e
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Acknowledgements 91 This evidence a
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Chapter 5 Ontogenetic vertical “m
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The statistical analysis of vertica
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Methods 101 80, 55, 30 m (Figure 4.
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Methods 103 same station were likel
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Results 105 Figure 5.2 Univariate r
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Results 107 5.4.3 Ontogenetic shift
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Results 109 Figure 5.5 Violin plot
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Discussion 111 5.5 Discussion 5.5.1
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Discussion 113 expression of differ
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Chapter 6 Oceanography vs. behaviou
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Introduction 117 a good description
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A general modelling framework for l
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The balance between feeding and pre
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The balance between feeding and pre
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Page 185 and 186: General discussion 167 energeticall
Page 187: Acknowledgements 169 Therefore: •
Page 190 and 191: 172 Conclusion Un environnement pé
Page 192 and 193: 174 Conclusion global sur la connec
Page 194 and 195: 176 Conclusion l’intérêt est po
Page 196 and 197: 178 Conclusion La différence entre
Page 198 and 199: 180 Conclusion Mieux décrire la di
Page 202 and 203: 184 Undescribed Chaetodonthidae Fig
Page 204 and 205: 186 Undescribed Chaetodonthidae Fig
Page 206 and 207: 188 Bibliographie [12] Cushing DH.
Page 208 and 209: 190 Bibliographie [39] Johnson MW.
Page 210 and 211: 192 Bibliographie [71] Paris CB, Co
Page 212 and 213: 194 Bibliographie [99] Lara MR. Mor
Page 214 and 215: 196 Bibliographie [127] Masuda R, S
Page 216 and 217: 198 Bibliographie [157] Holbrook SJ
Page 218 and 219: 200 Bibliographie [187] Bowen B, Ba
Page 220 and 221: 202 Bibliographie [218] Oxenford HA
Page 222 and 223: 204 Bibliographie [246] Wellington
Page 224 and 225: 206 Bibliographie [276] Sargent RC,
Page 226 and 227: 208 Bibliographie [308] Greenberg D
Page 228 and 229: 210 Remerciements solides pour ces
Page 230 and 231: 212 Remerciements tri des larves de
Page 232: 214 Remerciements Évidemment, tout
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