CONTENTS 
Introduction 
Methods 
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Seasonality of abundance 
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Distribution relative to the 50-m depth contour 
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Relationships of biological variables to temperature and salinity 
Acknowledgments 
Literature cited 
Figures 
Chart of eastern Gulf of Mexico ichthyoplankton survey area 
Contour charts of zooplankton volumes 
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Frequency distribution of zooplankton volumes 
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Frequency distribution of fish larvae abundance 
Mean zooplankton volumes 
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11. Comparison of mean zooplankton volumes for stations north and south of lat. 27°15'N ................ 
12. Comparisons of mean fish egg and fish larvae abundances north and south of lat. 27°15'N 
13. Comparison of mean zooplankton volumes between stations less than and more than50m...:......... 
14. Comparisons of mean fish egg and fish larvae abundances between stations less than and more 
than 50m 
5S OO Se ST eNOS 
Tables 
1. Cruises and number of stations analyzed for zooplankton volumes and ichthyoplankton, 1972-74 ....... 
2. Mean zooplankton volumes and numbers of fish eggs and larvae for each cruise ...................... 
3. Summary of plankton, fish eggs, and fish larvae data for each cruise in northern and southern areas ... 
4. Summary of plankton, fish eggs, and fish larvae mean catches for each cruise in depths less than and 
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5. Summary of simple correlations among biological variables ................. 0.0 cee eee eee eee eee 
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