Science Paperbacks

1 Ecological Genetics.- 2 Numerical Changes in Animal Populations.- Numerical fluctuations in a colony of Melitaea aurinia.- Numerical fluctuations in Panaxia dominula.- Numerical fluctuations in a Maniola jurtina population.- Some effects of climate and food on animal numbers.- The spread of species in new territories.- 3 Genetic Drift and the Founder Principle.- Random genetic drift.- The founder principle.- 4 Polygenic Characters Evolving in Isolation.- Selection for a balanced gene-complex in Panaxia dominula.- Selection for spotting in Maniola jurtina.- Maniola jurtina in the Isles of Scilly.- 5 Sympatric Evolution.- The transition between different stabilizations of Maniola jurtina.- 6 The Theory of Genetic Polymorphism.- Balanced polymorphism.- The evolution of polymorphism.- The formation of super-genes.- Human polymorphism.- Criticisms of the polymorphism concept.- 7 Balanced Polymorphism in Panaxia dominula.- Estimates of larval populations.- Estimates and analysis of imaginal populations.- Experimental populations.- 8 Polymorphism and the Effects of the Switch-gene.- Selection for the effects of the switch-gene.- Heterozygous advantage and multiple-phase polymorphism.- Sex-controlled polymorphism.- Polymorphism in hydrogen cyanide production.- The super-gene.- Protein variation and 'neutral' mutants.- 9 Polymorphism and the Super-gene in Snails.- The genetics of Cepaea nemoralis.- Natural selection in populations of C. nemoralis.- Selection and genetic drift in C. nemoralis and C. hortensis in England and France.- Partula and Achatinella on Pacific islands.- 10 The Heterostyle-Homostyle System.- The homostyle primrose in England.- Primrose pollination.- Tristylic and 'concealed' heterostyled conditions.- 11 Chromosome Polymorphism.- Drosophila.- Chromosome polymorphism and selection in Drosophila.- Heterozygous advantage in chromosome polymorphism.- Other organisms, and conclusion.- 12 Mimicry.- General survey.- Experimental proofs of mimicry.- Mimetic polymorphism in the Lepidoptera.- Mimicry in brood parasites.- Aggressive mimicry.- Sound and scent mimicry.- 13 Papilio dardanus and the Evolution of Mimicry.- The races of Papilio dardanus.- The genetics of Papilio dardanus.- The evolution of mimicry.- Monomorphic Batesian mimicry.- 14 Transient Polymorphism and Melanism.- Transient polymorphism.- The spread of melanic forms.- Explanations of industrial melanism.- Selective elimination by birds.- The insularia forms.- The evolution of melanic forms.- Melanism in Phigalia pedaria.- Melanism in the beetle Adalia bipunctata.- A comparison of melanism in three species.- Recessive melanism.- Melanism in Amathes glareosa.- 15 Isolation and Adaptation.- Mortality in small localities.- The evolution of local races and species.- Ecological genetics and adaptation.- Conclusion.- Plates.- References.