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250 200 Body size (mm) 150 100 50 0 0 1000 2000 3000 4000 5000 6000 Depth (m) Fig. 4.4. Body size of the asteroid community in PSB and PAP plotted against depth. Egg size (µm) 1800 1600 1400 1200 1000 800 600 400 200 0 0 1000 2000 3000 4000 5000 6000 Depth (m) Fig. 4.5. Egg size of the asteroid community in PSB and PAP plotted against depth. 77
Gonad index 16 14 12 10 8 6 4 2 0 0 1000 2000 3000 4000 5000 6000 Depth (m) Fig. 4.6. Gonad Index of the asteroid community in PSB and PAP plotted against depth. In this cluster is found one species from the family Porcellanasteridae (Porcellanaster ceruleus Wyville Thomson), one species from the family Benthopectinidae (Cheiraster sepitus Verrill) and species from the genus Pteraster. All the members of the family Goniasteridae analyzed in this study were clustered in this group, the same result was observed in the families Poranidae, Brisingidae and Echinasteridae. 78
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University of Southampton Research
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Graduate School of the National Oce
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UNIVERSITY OF SOUTHAMPTON ABSTRACT
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Marthasterias glacialis (ECHINODERM
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Acknowledgments I know everybody sa
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Prière de l’étoile de mer Seign
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species of asteroid Patiriella para
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embryonic tolerances could determin
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dispersed over great distances and
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lecithotrophic development. The pre
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al., 1997). In a review (Vrijenhoek
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Although larval dispersal and settl
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larvae of shallow water echinoids f
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few hours, whereas other species su
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een defined as a unique sequence of
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therefore a developing form may wel
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adults” that have the definitive
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The dipleurula is the hypothetical
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among tunicate tadpoles, sponge and
Page 39 and 40: Fig.2.4. Bipinnaria larvae of the a
Page 41 and 42: In marine invertebrates there is a
Page 43 and 44: independent of habitat or mode of n
Page 45 and 46: whether juveniles derived from larv
Page 47 and 48: and the northern Mediterranean have
Page 49 and 50: Wares (2001) performed phylogenetic
Page 51 and 52: Fig. 3.2. A. Marthasterias glaciali
Page 53 and 54: 3.2.2- Temperature/pressure effects
Page 55 and 56: Pressure was applied using an Enerp
Page 57 and 58: Fig. 3.7. Bippinaria larvae of Mart
Page 59 and 60: X Data were abnormal. At 150 and 20
Page 61 and 62: X Data all the embryos were abnorma
Page 63 and 64: X Data blastulae, at 200atm 90% of
Page 65 and 66: 50atm more than 90% of embryos were
Page 67 and 68: Those data (Young et al., 1997; Ped
Page 69 and 70: Percentage of individuals swimming
Page 71 and 72: that settling invertebrate larvae d
Page 73 and 74: CHAPTER FOUR- REPRODUCTIVE FEATURES
Page 75 and 76: In 1973, Vance proposed a theoretic
Page 77 and 78: Species Volume Energy Dev Class Ref
Page 79 and 80: 4.1.2- Body Size The reproductive o
Page 81: Species Depth of max. Depth range (
Page 84 and 85: arm, and the minor radius (r), from
Page 86 and 87: From Eqs.1 and 3 we obtain the esti
Page 88 and 89: Data on maximum body size, maximum
Page 92 and 93: Fig. 4.7. Hierarchical cluster anal
Page 94 and 95: (Hymenaster membranaceus Thomson).
Page 96 and 97: gamete production at low population
Page 98 and 99: varies depending on the vitellogeni
Page 100 and 101: size, high fecundity, small egg siz
Page 102 and 103: strategy described by Winemiller an
Page 104 and 105: It seems that evolutionary features
Page 106 and 107: strategy stablished by the Winemill
Page 108 and 109: which normal embryonic/larval devel
Page 110 and 111: Larval dispersal from eight populat
Page 112 and 113: These results are very important si
Page 114 and 115: possibility. The opportunistic spec
Page 116 and 117: hypothesis that the Mesozoic and ea
Page 118 and 119: Barnes, H. and H.T. Powell. 1951. T
Page 120 and 121: Chester, C.M. 1996. The effect of a
Page 122 and 123: Crisp, D.J. 1978. Genetic consequen
Page 124 and 125: David, B., A. Guille, J-P. Féral a
Page 126 and 127: Grant, A. 1983. On the evolution of
Page 128 and 129: Inaba, D. 1934. On some holothurian
Page 130 and 131: of the 6 th International Echinoder
Page 132 and 133: Lieberkind, I. 1926. Ctenodiscus au
Page 134 and 135: McEdward, L.R. and S.F. Carson. 198
Page 136 and 137: Minchin, D. 1987. Sea-water tempera
Page 138 and 139: Pawson, D.L. 1976. Some aspects of
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Pingree. R.D., B. Sinha and C.R. Gr
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Savidge, G., H.J. Lennon, and A.D.
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Shilling, F.M. and D.T. Manahan. 19
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Turner, R.L. and J.M. Lawrence. 197
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Vickery, M.S. and J.B. McClintock 2
Page 150 and 151:
(Eds.): Reproduction Genetics and D
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