CONTENTS 



Page 



Sampling procedure 145 



Two-tow station data 147 



Distribution of species and numbers of fish 148 



Some applications of the logarithmic series to trawl data 150 



Distribution of species per tow 151 



Use of catch data in the analysis of variance 152 



Discussion 153 



The distribution theory 153 



Application of distribution theory to census problem 155 



Summary 156 



Appendix A. — A model for fish population distribution 157 



Appendix B. — Characteristics and fitting of the negative binomial distribution 158 



Appendix C. — The logarithmic series 158 



Appendix D. — A negative binomial distribution fitted to number of plaice eggs 



caught by a plankton net 159 



Appendix E. — Proof, smaller sampling unit more efficient with heterogeneity present., 159 



References cited 162 



Tables 163 



n 



