Maturity and spawning of the Pacific bonito, Sarda chiliensis lineolata, in the eastern North Pacific
A study of maturity and spawning of Pacific bonito,Sarda chiliensis lineolata, was conducted from September1974 to August 1976. Macroscopic examination of the testesand microscopic observation of the ovaries were found to bereliable in determining the extent of sexual development ofindividual bonito. Spawning occurred primarily in BajaCalifornia waters, between Thetis Bank and Hutchin's Bankduring the spring and summer. The study found that 100% ofthe males larger than 50 cm (19.7 inches) and at least 2years old and 97.5% of the females larger than 55 cm (21.6inches) and older than age 2 were mature. An analysis ofthe ova diameters in spawning fish indicates that bonitospawned more than once each season; the exact frequencycould not be determined. Estimates of fecundity were unsatisfactory. (60pp.)
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| Format: | monograph biblioteca |
| Language: | English |
| Published: |
California Department of Fish and Game
1978
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| Subjects: | Fisheries, Biology, Pacific bonito, Sarda chiliensis, Baja California, reproduction, fecundity, |
| Online Access: | http://hdl.handle.net/1834/18612 |
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