from Park waters ranged from 1 to 5 yrs of age, with age groups II and III making up 
62 and 29% of the catch. Mean lengths for each age group, age and length at 
recruitment into the sport fishery length-weight relationship, and sex ratio of gray 
snapper are given. All Everglades Park fish were immature. The stomachs of 200 fish 
were examined for food contents. Crustaceans made up 61.6% of food items by number 
and 76.7% by volume, shrimp occurring most frequently. Fish and crabs occurred in 34 
and 27% of the stomachs containing food. 
1959 - 1960 
Iversen, E. S., and D. C. Tabb (1962) Subpopulations based on growth and tagging studies of 
spotted seatrout, Cynoscion nebulous, in Florida. Copeia. 3:544-48. 
Analyses of subpopulations of spotted seatrout were made using growth and tagging 
data from several locations along the coast of Florida (Cocoa, Flamingo, Fort Myers, 
Cedar Key, and Apalachicola). Growth rates from these areas show differences that 
suggest subpopulation of this species. These findings agree with tagging results wherein 
95% of recaptured seatrout moved less than 30 mi from where they were tagged. 
Results of the two studies suggest a close association of the seatrout with the local 
environment. 
1959 - 1960 
Stewart, K. W. (1961) Contribution to the biology of the spotted seatrout (Cynoscion 
nebulosus) in the Everglades National Park, Florida. M. S. Thesis. University of Miami, 
Coral Gables, FL, 103 pp. 
The Everglades National Park area is near the southernmost limit of distribution of the 
spotted seatrout. The spotted seatrout is more specific in its need for estuarine 
conditions than the other three species of Cynoscion found on the Atlantic and Gulf 
coasts of the United States. There is considerable variation in the relative proportions 
of the scales of the spotted sea-trout. The relationship of scale radius to body length is 
apparently linear although widely scattered. The spotted seatrout in the Everglades 
National Park form an annulus on their scales only once each year and at the same time 
each year. This is primarily in December, although a few fish form the annulus in 
November and January. The oldest observed age for the spotted seatrout of the Park 
was seven years. There is a pronounced sexual dimorphism in the age composition and 
growth rate of the spotted seatrout. The females grow more rapidly, reach peak 
abundance in the catch at a later age, and live longer than the males. The size at first 
maturity of the spotted seatrout ranges from 190 to 300 mm. There is no apparent 
difference in the size at first maturity between males and females. The spawning period 
of the spotted seatrout of the Everglades National Park is distinctly bimodal. A spring 
peak in spawning activity occurs in May, and a fall peak in September, and there are 
ripe fish of both sexes present every month of the year. Attempts made to determine 
the area of spawning and juvenile development within the Park were unsuccessful. The 
spotted seatrout of the Everglades National Park depend primarily upon the pink shrimp 
as a source of food. The feeding activity of the spotted seatrout is primarily governed 
by the availability of food. Minor ecological factors may affect the areas in which 
feeding takes place. 
1959 - 1961 
Stockman, K. W., R. N. Ginsburg and E. A. Shinn (1967) The production of lime mud by algae 
in south Florida. J, Sed. Petrol, , 37(2):633-48. 
[NO COPY OF PAPER AVAILABLE. ABSTRACT FROM SCHMIDT (1991).] A study was 
made on the origin of recent lime muds in south Florida, mostly within the northeast 
interior of Florida Bay. Comparison of the annual production of fine aragonite mud (<15 
ug) by the post-mortem disintegration of fragile algal skeletons, showed the algae, 
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