History of UT Entomology Part 3: Oz's Mosquitoes and Beetles

The World Health Organization defines disease vectors as “living organisms that can transmit infectious pathogens between humans, or from animals to humans. Many of these vectors are bloodsucking insects, which ingest disease-producing microorganisms during a blood meal from an infected host (human or animal) and later transmit it into a new host, after the pathogen has replicated.” Many commonly-known mosquito diseases include malaria (transmitted by Anopheline mosquitoes), dengue, Zika, and Yellow Fever (all transmitted by Aedes mosquitoes).

After the war when Breland returned to UT Austin, he would teach entomology and parasitology. He and his graduate students studied the larval biology and breeding areas of Texas mosquitoes. Most of Breland’s technical articles deal with these organisms, and to most current researchers, his work on the taxonomy and bionomics of a number of Texas mosquitoes is what he is best known for. In his 1959 paper “Preliminary observations on the use of the squash technique for the study of the chromosomes of mosquitoes,” he described a simple method of preparing larval brain chromosomes for study. This would pioneer much of the later work in mosquito cytology and cytogenetics.

Perhaps a little history of mosquito research in Texas is in order. Mosquito systematics began in the early 1900s with the USDA Bureau of Entomology. Texas was an area where collectors from Washington DC would come to collect every type of mosquito. In response to the federally-funded malaria eradication program, the Texas Department of Health began to collect and identify mosquitoes. Public Health Service entomologists published information about their collections as well as their travels, and soon more Texas researchers would become involved with collecting and identifying species. However, these researchers did not usually do systematics, the process of evaluating specimens to determine if they should be the same or different species.

Breland also wrote both academic texts and numerous taxonomic works, one example being Keys to the Larvae of Texas Mosquitoes. He also wrote works for a more general audience, titles like Animal Facts and Fallacies (1948) and Animal Friends and Foes (1957), both combined in 1963 under the title, Animal Life and Lore. These books started from questions he would receive from both students as well as the general public, questions he could not answer but would research, accumulating what he called “fairly useless information” in the form of clippings and magazine references. His intention was to create a book people could turn to for common entomological and zoological questions like “How do ants swarm?” and “What insects live the longest?” These books were quite popular for the time and were translated into several languages.

Outside of his work on mosquitoes, Breland spent the last phase of his scientific career in the cytological study of insect sperm production. He and a graduate student, Everett Simmons, discovered a unique feature of the sperm of whirligig beetles (Coleoptera Gyrinidae), a family of water beetles. Male whirligig beetles embed their sperm in a spermatostyle, a non-cellular rod. Once the spermatostyle is released, the sperm then cooperatively propel themselves to the spermathecae, an organ of the female reproductive tract in in invertebrates and certain vertebrates. As Breland was not an evolutionary biologist, it didn’t strike him at the time the significance in social biology of discovering sperm cooperating to get someplace. Luckily, recent interest from evolutionary biologists in sperm competition has brought attention to Breland’s and Simmons’ discovery.

People that knew Breland described him as “fulgent” (glisteningly bright) and a “stickler to facts.” Breland had a low tolerance when it came to flamboyant writing and academic bureaucracy, but a talent in teaching his students how to properly navigate both. He also enjoyed playing poker, so much so that he had a book in his personal library all about how one could make a living at the game.

In 1972, American entomologist, Thomas Zavortink, named a mosquito after Breland: Aedes brelandi.

Breland was a smoker, and sadly would die of emphysema in 1984 at the age of 74. He is buried in the Austin Memorial Park Cemetery. Many of the mosquitoes and wasps that Breland collected are now housed in the UT Entomology Collection. 

In our next article, we will look at the screwworm fly, (Cochliomyia hominivorax), the decades of devastation it brought, and how UT researchers had a hand in bringing it under control.

Special thanks to Dr. William Sames for his contributions and edits to this article.

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