studies of sibling drosophila species from laguna verde, veracruz, mexico: i. species frequencies, viability, desiccation resistance, and vagility. | the sibling species drosophila melanogaster and d. simulans were collected at laguna verde, veracruz, mexico. d. melanogaster was found in significantly greater frequency than was d. simulans. ten isofemale lines of each species were tested for egg to adult viability, desiccation resistance, and vagility. d. melanogaster surpassed d. simulans in all three characteristics. the findings are discussed with reference to the climatic conditions at laguna verde and the expected effect of such an envir ... | 1989 | 2493497 |