Simulation modeling of conservation standards for spotted seatrout (Cynoscion nebulosus) in Everglades National Park
Schirripa MJ and Goodyear CP. 1994. Simulation modeling of conservation standards for spotted seatrout (Cynoscion nebulosus) in Everglades National Park. Pages 1019-1035. In Schirripa MJ and Goodyear CP. Symposium on Florida Keys Regional Ecosystem
A stock assessment was conducted on the spotted seatrout (Cynoscion nebulosus) stock of Florida Bay in Everglades National Park including simulated outcomes of six possible regulatory options. Female ovarian weight (grams) was regressed on total length (inches) (ovarian weight = 9.62E - 04 total length super(3.542661); r = 0.78). Annual estimates of fishing mortality (F) for fully recruited fish (age 4-8) ranged from F = 0.28 in 1981 to F = 0.91 in 1974 with an overall average of F = 0.54. Annual estimates of spawning potential ratio ranged from a low of 28% in 1974 to a high of 35% in 1981. Yield-per-recruit analysis suggests that with 10% release mortality the fishery is now operating very near the level of mortality that would produce the maximum yield-per-recruit. However, a 25% release mortality would place the fishery beyond this level. Simulations indicate that if fishing mortality continues at the estimated levels for 1990 then increasing the minimum size to 16 inches would increase yield-per-recruit by 15% and increase the spawning potential ratio to 40% within 5 years.
- Type
- Book Chapter
- Authors
- Schirripa, M; Goodyear, C
- Units
- EVER
- Keywords
- Animal Studies, Modeling, Population, Preservation, Spotted Seatrout (Cynoscion nebulosus)