[1] Univ Calif Berkeley, Berkeley, CA 94720 USA
[2] Lab Arago, F-66650 Banyuls Sur Mer, France
[3] Ecole Normale Super Lyon, Inst Expt Endocrinol, AliX, Illkirch Graffenstaden, France
[4] INRA, F-31931 Toulouse, France
[5] Oregon Hlth & Sci Univ, Portland, OR 97201 USA
[6] Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA