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The ovarian cycle of the cuckoo ray, Raja naevus (Müller and Henle), in the Celtic Sea
Author(s) -
Buit Marie Henriette
Publication year - 1976
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1976.tb03943.x
Subject(s) - biology , fecundity , zoology , anatomy , demography , sociology , population
One hundred female Raja naevus from the South Celtic Sea were examined every month for 14 consecutive months, for the characteristics of their ovarian cycle. Egg‐laying occupied more than half of the cycle. All females followed the same genital cycle but independently of each other. On the average 56% of adult females were at egg‐laying stage at any time throughout the year. Fecundity is estimated at 90 eggs a year.