Fecundity, Sexual Maturation, and Spawning of Scaled Sardine (Harengula Jaguana Poey)
Abstract:A total of 406 scaled sardines, Harengula jaguana, from the east coast of Florida, were examined to determine fecundity, size at first maturity, and seasonal maturation cycle. Based on gonad index (weight of gonad divided by body weight × 100), spawning occurred from February to August with a peak in April and May. Size at first maturity, also inferred from gonad index, was 7.8 to 8.5 cm SL, for both sexes. Sexual maturity was attained at one year of age. For 22 specimens, 8.5 to 16.3 cm SL, fecundity, estimated by the gravimetric method, ranged from 5,563 to 52,753 ova. Fecundity increased with size and was examined in relation to length, weight and age. The log10 transformed fecundity-length data gave the best correlation. Mean relative fecundity (ova per g body weight) was 548 and did not change significantly with fish size. Scaled sardine ovaries contained three modes of oocytes: (1) primary, (2) intermediate and (3) most advanced. Oocytes in intermediate and most advanced modes are spawned during one spawning season.
Document Type: Research Article
Publication date: 1975-01-01
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