
TY  - JOUR
A1  - Dotan, A 
T1  - Reproduction of the Slate Pencil Sea Urchin, <I>Heterocentrotus mammillatus</I> (L), in the Northern Red Sea
JF  - Marine and Freshwater Research
JO  - Mar. Freshwater Res.
Y1  - 1990
VL  - 41
IS  - 4
SP  - 457
EP  - 465
KW  - 
UR  - https://doi.org/10.1071/MF9900457 
N2  - The annual reproductive cycle of Heterocentrotus mammillatus was studied in the northern Red Sea. Gametogenesis starts in January, and the abundance of ripe gametes gradually increases until, by May, they occupy most of the gonadal volume. Spawning occurs in June and July; the pattern suggested a lunar or semilunar cycle. Assays of KC1 injections suggest that these may be a better indicator of reproductive ripeness than conventional oocytes-ova analysis. A highly significant linear relationship between gonad weight and total body weight was observed at the period of maximal gonad size prior to spawning. 
ER  -

