Estimated survival rates for immature red drum in northwest Gulf of Mexico bays.




Green, A.W.
Osburn, H.R.
Matlock, G.C.
Hegen, H.E.

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A mean annual survival rate of 15 +- 2 % (S.E.) was estimated for tagged red drum (Sciaenops ocellatus) for the period November 1975-April 1979 in bays of the northwest Gulf of Mexico. Annual survival estimates were calculated as the product of four seasonal estimates. Seasonal survival estimates were based on tags recovered from recreationally and commercially harvested red drum. Seasonal red drum survival rates were lower for a 3-month summer period (36+- 8% May-July) than for any other quarter (81+- 9% during the year). Survival rates were similar for two different size-groups (190-400 mm and 401- 950 mm total length). Annual survival rates for red drum were as low or lower than any other exploited fish population for which survival rates have been published. The annual fishing mortality was estimated to be 46.5%.


p. 263-277.


marine fish, red drum, Sciaenops ocellata, juveniles, tagging, mortality, survival