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Changes in serum androgens and estrogens during spawning in bluefish Pomatomus saltator and king mackerel Scomberomorus cavalla
MacGregor III, R.; Dindo, J.J.; Finucane, J.H. (1981). Changes in serum androgens and estrogens during spawning in bluefish Pomatomus saltator and king mackerel Scomberomorus cavalla. Can. J. Zool. 59(9): 1749-1754
In: Canadian Journal of Zoology = Revue canadienne de zoologie. National Research Council: Ottawa. ISSN 0008-4301, more
Peer reviewed article  

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Keywords
    Seasonal variations; Serum; Sex characters; Sex hormones; Spawning; Scomberomorus cavalla (Cuvier, 1829) [WoRMS]; ASW, Mexico Gulf [Marine Regions]; Marine

Authors  Top 
  • MacGregor III, R.
  • Dindo, J.J.
  • Finucane, J.H.

Abstract
    Androgens and estrogens were assayed by radioimmunoassay (RIA) technique in serum of bluefish, Pomatomus saltator , and king mackerel, Scomberomorus cavalla . Both species were collected in the northeast Gulf of Mexico from August through November 1979. When categorized by stage of ovarian development a significant correlation between gonadosomatic indices (GSI) and serum estrogens was observed among female S. cavalla but not among P. saltator . Among males and females of both species, a significant correlation between GSI and serum androgens occurred. Peak levels of androgens in male king mackerel (38.12 plus or minus 11.21 ng/mL) were not significantly different from peak levels of females (33.14 plus or minus 5.10 ng/mL). However, in female bluefish, androgens peaked at 3.68 plus or minus 0.88 ng/mL, twofold greater than in males (1.66 plus or minus 0.28 ng/mL). Following this peak, a significant reduction in androgens occurred in ripe female bluefish.

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