105 



Diameter of eggs of sea stars 



Species 



Diameter 





of eggs, |im 



Pentaceraster mammillatiis 



about 100 



Asterias amurensis 



about 100 



Astehas sp. 



110 



Ophidiaster guildingii 



110-120 



Pvcnopodia helianthoides 



120 



Stichaster australis 



120-140 



Odontaster validus 



130 



Asterias rubens 



120-150 



A. rubens 



160-190 



Concinasterias calamaria 



140-160 



Pisaster ochraceus 



160 



Sclerasterias richardi 



170 



Patiria pectinifera 



170 



Astropecten scoparius 



230 



Astropecten latespinosus 



250^00 



Patiriella exigiia 



400 



P. calcar 



400 



Asterina coronata 



420 



A. bather i 



430 



A. minor 



430-500 



A. burtoni 



450-500 



A. gibbosa 



500 



Urasterias lincki 



700 



Crossaster papposus 



700 



Leptasterias hexactis 



800 



Solaster endeca 



800-1,000 



Echinaster echinophorus 



800-1,300 



Fromia ghardaquana 



about 1,000 



Echinaster sepositiis 



1,000 



Henricia sanguinolenta 



1,000 



Pteraster militaris 



1,000 



Mediaster aequalis 



1,000-1,200 



Notasterias armata 



3,540 



Source 



Mortensen, 1937 



Dautov and Kasyanov, 1981 



Costello et ai., 1957 



Mortensen, 1921 



Greer, 1962 



Barker, 1978 



Pearse, 1969 



Kaufman, 1977 



Gemmill, 1914 



Barker, 1978 



Strathmann and Vedder, 1977 



Falconetti et ai, 1978 



Dautov and Kasyanov, 1981 



Oguro et al., 1976 



Komatsu, 1975 



Lawson-Kerr and Anderson, 1978 



Lawson-Kerr and Anderson, 1978 



Komatsu, 1975 



Kano and Komatsu, 1978 



Komatsu, 1976 



James, 1972 



McBride, 1896 



Kaufman, 1977 



Kaufman, 1977 



Chia, 1968 



Gemmill, 1912 



Atwood, 1973 



Mortensen, 1937 



Nachtsheim, 1914 



Kaufman, 1977 



Kaufman, 1977 



Birkeland et ai, 1971 



McClintock and Pearse, 1986 



Fertilization : Insemination and subsequent fertilization usually occur 

 between the dissolution of the germinal vesicle and the separation of polar 

 body I. The spermatozoa of sea stars are acrosomal and during fertilization 

 an acrosomal reaction of the spermatozoon occurs, whereby the acrosomal 

 filament of the spermatozoon penetrates the jellylike membrane and comes 

 into contact with the egg (J.C. Dan, 1970). This is followed by a cortical 

 reaction in the egg; one morphological manifestation of this reaction is the 

 extrusion of the contents of cortical granules into the perivitelline space 

 between the egg and the vitelline membrane, and the latter being modified 

 into a fertilization membrane. The vitelline membrane detaches from the 



