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Pisaster ochraceus

Another category of thermal effect on distribution patterns involves temperature-depen-dent rates of predation. Sanford (1999) demonstrated that predation by the sea star Pisaster ochraceus on Mytilus californianus was remarkably temperature-dependent. When water temperatures increased from approximately 8-9°C to 11-12°C, rates of predation by Pisaster increased severalfold. A rapid clearing of mussel beds by P. ochraceus occurred if warm temperatures persisted. [Pg.434]

Estradiol and progesterone have been tentatively identified in extracts of ovaries of the starfish Pisaster ochraceus [93] and the sea urchin Stronglyocentrotus fran-ciscanus [94]. Progesterone was also identified in the ovaries of the starfish Asterias amurensis by Ikegami [95]. The physiological role of progesterone in starfish ovaries is unknown, but probably is connected with oocyte maturation. [Pg.208]

Hd. +6.0 SPECTRAL data IR, PMR organism Pisaster ochraceus, and Asterias... [Pg.74]

See other pages where Pisaster ochraceus is mentioned: [Pg.197]    [Pg.153]    [Pg.752]    [Pg.757]    [Pg.757]    [Pg.213]    [Pg.197]    [Pg.153]    [Pg.752]    [Pg.757]    [Pg.757]    [Pg.213]    [Pg.46]   
See also in sourсe #XX -- [ Pg.190 ]

See also in sourсe #XX -- [ Pg.15 , Pg.61 ]

See also in sourсe #XX -- [ Pg.61 ]

See also in sourсe #XX -- [ Pg.153 ]

See also in sourсe #XX -- [ Pg.74 ]

See also in sourсe #XX -- [ Pg.213 , Pg.214 ]



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