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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
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Fig.2.4. Bipinnaria larvae of the a
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In marine invertebrates there is a
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independent of habitat or mode of n
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whether juveniles derived from larv
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and the northern Mediterranean have
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Wares (2001) performed phylogenetic
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Fig. 3.2. A. Marthasterias glaciali
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3.2.2- Temperature/pressure effects
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Pressure was applied using an Enerp
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Fig. 3.7. Bippinaria larvae of Mart
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X Data were abnormal. At 150 and 20
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X Data all the embryos were abnorma
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X Data blastulae, at 200atm 90% of
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50atm more than 90% of embryos were
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Those data (Young et al., 1997; Ped
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Percentage of individuals swimming
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that settling invertebrate larvae d
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CHAPTER FOUR- REPRODUCTIVE FEATURES
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In 1973, Vance proposed a theoretic
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Species Volume Energy Dev Class Ref
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4.1.2- Body Size The reproductive o
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Species Depth of max. Depth range (
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arm, and the minor radius (r), from
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From Eqs.1 and 3 we obtain the esti
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Data on maximum body size, maximum
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250 200 Body size (mm) 150 100 50 0
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Fig. 4.7. Hierarchical cluster anal
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(Hymenaster membranaceus Thomson).
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gamete production at low population
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varies depending on the vitellogeni
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- 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
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- Page 144 and 145: Shilling, F.M. and D.T. Manahan. 19
- Page 146 and 147: Turner, R.L. and J.M. Lawrence. 197
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