Age-size structure of red grouper, (Epinephelus morio), from the eastern Gulf of Mexico
Johnson, A.G.; Collins, L.A. (1994). Age-size structure of red grouper, (Epinephelus morio), from the eastern Gulf of Mexico. N.E. Gulf Sci. 13(2): 101-106
In: Northeast Gulf Science. Marine Environmental Science Consortium of Alabama: Dauphin Island. ISSN 0148-9836, more
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| Keywords |
Age determination
Age determination > Otolith reading
Aquatic organisms > Marine organisms > Fish > Marine fish
Audiovisual materials > Graphics > Graphs > Growth curves
Body size
Population characteristics > Population structure > Age composition
Taxa > Species > Commercial species
Epinephelus morio (Valenciennes, 1828) [WoRMS]
Marine/Coastal |
| Authors | | Top |
- Johnson, A.G.
- Collins, L.A.
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| Abstract |
Sagittal otoliths from 534 red grouper, Epinephelus morio, were collected from recreational and commercial fisheries of the eastern Gulf of Mexico in 1979-1981 (236 fish) and 1991-1992 (298 fish). Age estimations for the two collections were made in 1991-1992 from the surface and transverse sections of these otoliths. Also, estimates of back-calculated size at age (using the final annulus present at time of capture following Lea's (1910) method were made for these collections. Red grouper were larger in size at capture at age and back-calculated size at age in 1991-1992 than in 1979-1981. The respective von Bertalanffy growth parameters were: 1979-81 L arrow left = 78.9, K = 0.1778, t sub(0) = 0.8259; 1991-92 L arrow left = 92.6, K = 0.1588, to) = 0.9323 where L arrow left is mean maximum attainable total length in centimeters, K is growth coefficient, and to) is hypothetical age in years at which fish would have zero length. |
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