- Author: Kathy Keatley Garvey
Scientists estimate that only 10 percent of the eggs and 'cats survive to adulthood.
They don't "survive" at all in California classrooms.
California classrooms used to showcase the metamorphosis of the monarch--from egg to caterpillar to chrysalis to adult-- but no more. If you live in California, you're not allowed to collect or rear monarchs without a scientific permit. And scientific permits are difficult to obtain.
According to the California Department of Fish and Wildlife: "A Scientific Collecting Permit (SCP) is required to handle wild monarchs in California including for educational purposes. It is unlawful to collect, remove from the wild and/or captively rear monarchs in California without an SCP, per California Code of Regulations (CCR), Title 14, section 650.
Admire them in the wild, but legally, you can't collect or rear them.
As a child growing up in the San Jose area, entomologist Jeff Smith, curator of the Lepidoptera collection at the Bohart Museum of Entomology, UC Davis, "raised and released many, many dozens of monarchs, as most empty lots were filled with vast stands of narrow-leaf milkweed, and we could easily gather caterpillars and keep them fed and healthy until they matured. This was an extraordinary thing to be able to watch--the final instar of the larva molting to change to the beautiful chrysalis and then seeing the butterfly develop within the chrysalis and hatch. We would hold it on our finger as the wings expanded and, finally, the butterfly flew away."
The Bohart Museum has some seven drawers of monarch specimens. "With around 60 specimens per drawer that could amount to nearly 400 plus specimens (some drawers are not full," he said. The collection also includes nearly-white monarch specimens from Hawaii.
In their book, The Lives of Butterflies: A Natural History of Our Planet's Butterfly Life (Princeton University Press, 2024), authors David James and David Lohman point out that "...our children are the future and it is they who will determine the future of butterflies. If a child finds a caterpillar, let them keep it, feed it, and watch it metamorphose.They will remember the experience for the rest of their life, and it will instill in them a love and appreciation for lives smaller than their own."
James is an entomologist and associate professor at Washington State University who researches migratory monarchs, and Lohman is a biologist, professor and department chair, City College of New York.
“It is important that we do not try to excessively regulate to conserve butterfly populations," they wrote. "We need people to be part of the process and be the power on the ground behind conservation programs.”
They quote Lincoln Brower (1931-2018), a renowned Lepidopterist educated at Princeton and Yale universities: “Butterflies are treasures, like great works of art. Should we not value them as much as the beauty of Picasso's art or the music of Mozart or the Beatles?"
Robert Michael Pyle, founder of the Xerces Society for Invertebrate Conservation, and colleague David L. Wagner, advocated "Keep Nets in the Hands of Kids--and Others" in a piece in the fall edition of the Lepidopterists' Society newsletter. They asked:
"Is the coup de grace for children's face-to-face fascination with small-scale life to be delivered now by well-intentioned but ill-considered regulation?"
Smith declared that the regulation will not "help" with the conservation of monarchs, and that he hopes it will be reversed or modified.
- Author: Kathy Keatley Garvey
"I took a gap decade. During that time I had a series of eclectic jobs and life experiences. Those experiences proved extremely useful during my PhD."
Lamas, a former commercial beekeeper in New Hampshire, will share his life and research experiences at a seminar hosted by the UC Davis Department of Entomology and Nematology, on Monday, April 15.
His seminar, titled "How Doing a PhD Is Like Building a House," begins at 4:10 p.m. in Room 122 of Briggs Hall. It also will be on Zoom. The Zoom link:
https://ucdavis.zoom.us/j/9 5882849672
"This presentation describes how the intersection of life experiences and my PhD led to creative and generative research that led to large discovery in disease transmission dynamics in collapsing honey bee colonies," Lamas says.
A first-generation college student, Lamas received his bachelor's degree in biology in 2008 from Colby-Sawyer College, a private college in New London, New Hampshire. He obtained his doctorate in entomology at the University of Maryland in 2022.
He credits his mentor, USDA-ARS research entomologist Jay Evans of the Bee Research Laboratory, Beltsville, MD., with encouraging him to apply to become an Oak Ridge Institute for Science and Education (ORISE) fellow with the USDA-ARS Research Participation Program.
Lamas, known as "Dr. Zac," has presented programs on his research and beekeeping management to state beekeeping associations in California, Texas, Florida, Colorado, Virginia, Missouri, West Virginia, and Washington State, among others, and has addressed the American Beekeeping Federation, American Honey Producers' Association and Apimondia. Globally, he has delivered presentations to Apimondia, Montreal, Canada, and to the Eurbee 8th Congress of Apidology, Ghent, Belgium.
Lamas rears open-mated carniolans. "These are docile, productive bees, that I produce for my own experiments," he writes on his website. "We can literally pet our bees during experiments. This level of docility allows us to work intimately with the bees, sitting in front of open colonies for long periods to collect samples."
Lamas is a noted researcher on varroa mites. "Who do Varroa really feed on? Check out this presentation where I share a new finding of Varroa destructor I carried out three years of research, and along with collaborators (including my family!) individually inspected over 30,000 bees to describe the distribution of Varroa inside a colony." (See YouTube presentation.)
Lamas' recent publications involve varroa mites, infectious diseases and pesticides:
- Zachary S. Lamas, Eugene V. Ryabov, David J. Hawthorne, Jay D. Evans, "Oversharing by honey bees and the spread of viruses," bioRxiv 2022.05.15.492017; DOI: https://doi.org/10.1101/2022.05.15.492017
- Ryabov EV, Posada-Florez F, Rogers C, Lamas ZS, Evans JD, Chen Y and Cook SC (2022) "The vectoring competence of the mite Varroa destructor for deformed wing virus of honey bees is dynamic and affects survival of the mite," Frontiers in Insect Science. 2:931352. DOI: 10.3389/finsc.2022.931352
- Posada-Florez, F., Lamas, Z.S., Hawthorne, D.J. et al. "Pupal cannibalism by worker honey bees contributes to the spread of deformed wing virus," Scientific Reports 11, 8989 (2021). https://doi.org/10.1038/s41598-021-88649-y
- Alger, S.A.1, Burnham, P.A., Lamas, Z.S2, Brody, A.K., Richardson, L.R., (2017). "Home sick: impacts of migratory beekeeping on honey bee (Apis mellifera) pests, pathogens, and colony size," PeerJ 6:e5812; DOI 10.7717/peerj.5812
- Kirsten S. Traynor, Dennis vanEngelsdorp, Zachary S. Lamas, "Social disruption: Sublethal pesticides in pollen lead to Apis mellifera queen events and brood loss," Ecotoxicology and Environmental Safety, Volume 214, 2021, 112105, ISSN 0147-6513, https://doi.org/10.1016/j.ecoenv.2021.112105
Honey bee scientist Brian Johnson, associate professor, UC Davis Department of Entomology and Nematology, is coordinating the department's seminars for the 2023-24 academic year. For any Zoom technical issues, he may be reached at brnjohnson@ucdavis.edu.
The complete list of spring quarter seminars is here.
- Author: Kathy Keatley Garvey
Bees comprise more than 20,000 described species in seven families and are found on all continents except Antarctica, but where did they originate? And when did they originate?
Cornell University alumnus Eduardo Almeida, an associate professor at the University of São Paulo, Brazil, will discuss “The Evolutionary History of Bees in Time and Space” at a seminar hosted by the UC Davis Department of Entomology and Nematology on Monday, April 8.
The seminar begins at 4:10 p.m. in 122 Briggs Hall, and also will be on Zoom. The Zoom link:
https://ucdavis.zoom.us/j/95882849672
"Bees likely originated in the Early Cretaceous (120 million years ago), shortly before the breakup of Western Gondwana (Africa and South America), and the early evolution of any major bee lineage is associated with either the South American or African land masses," Almeida says in his abstract.
"I will present the results of an investigation on bee biogeograpy using extensive new genomic and fossil data to demonstrate that bees originated in Western Gondwana. Bees later colonized northern continents via a complex history of vicariance and dispersal. The notable early absences of these insects from large landmasses, particularly in Australia and India, have important implications for understanding the assembly of local floras and diverse modes of pollination. The partnership between flowering plants and bees began in the Cretaceous, and the history of how bees spread around the world from their hypothesized southern hemisphere origin parallels the histories of numerous plant clades."
Almeida, who joined the University of São Paulo in 2011, conducts research on bee evolution, and is particularly interested in phylogenomics, comparative morphology, biogeography, and associations with host plants.
A native of Brazil, he received his doctorate in 2007 from Cornell University, where he studied with major professor Bryan Danforth. Almedia's focus: the biogeographic history of colletid bees. Prior to enrolling in the doctoral program at Cornell, he obtained his bachelor of science degree (biology) and his master's degree (ecology) from the Universidade Federal de Minas Gerais, Brazil. He speaks Portuguese, English, Spanish and French.
Almeida and his colleagues published a research paper in August 2023 in the journal, Current Biology, on "The Evolutionary History of Bees in Time and Space."
The summary: "Bees are the most significant pollinators of flowering plants. This partnership began ca. 120 million years ago, but the uncertainty of how and when bees spread across the planet has greatly obscured investigations of this key mutualism. We present a novel analysis of bee biogeography using extensive new genomic and fossil data to demonstrate that bees originated in Western Gondwana (Africa and South America). Bees likely originated in the Early Cretaceous, shortly before the breakup of Western Gondwana, and the early evolution of any major bee lineage is associated with either the South American or African land masses. Subsequently, bees colonized northern continents via a complex history of vicariance and dispersal. The notable early absences from large landmasses, particularly in Australia and India, have important implications for understanding the assembly of local floras and diverse modes of pollination. How bees spread around the world from their hypothesized Southern Hemisphere origin parallels the histories of numerous flowering plant clades, providing an essential step to studying the evolution of angiosperm pollination syndromes in space and time."
Coordinating the department's spring seminars is associate professor Brian Johnson. For any technical Zoom issues, he may be reached at brnjohnson@ucdavis.edu.
The complete list of spring quarter seminars is here.
- Author: Kathy Keatley Garvey
The Gulf Fritillary, Agraulis vanillae, is definitely back from a comeback, at least in the Sacramento, Davis and Vacaville-Fairfield areas.
In September of 2009, butterfly guru Art Shapiro, now a UC Davis distinguished professor emeritus, excitedly announced the re-appearance of the Gulf Fritillary butterfly in the Sacramento metropolitan area after a four-decade absence, and in the Davis area after a 30-year absence.
The showy butterfly colonized both south Sacramento and the Winding Way/Auburn Boulevard area in the 1960s but by 1971 "apparently became extinct or nearly so," recalled Shapiro, who has monitored the butterfly populations of central California since 1972 and maintains a research website at https://butterfly.ucdavis.edu.
It's a tropical and subtropical butterfly with a range that extends from the southern United States all the way to central Argentina.
No one knows exactly when the first Gulf Frit first arrived in California, but "it was already in the San Diego area by about 1875, Shapiro says, and it was first recorded in the San Francisco Bay Area around 1908.
A recent piece in The Acorn, published by the Effie Yeaw Nature Center, Carmichael, and authored by UC Davis entomologist Mary Louise Flint (see article), indicated the Gulf Fritillary is doing well in the area.
Good news!
- Author: Emily C. Dooley, UC Davis
Matching herds to landscape can support animal growth and ecological needs
Not all cattle are the same when it comes to grazing. Some like to wander while others prefer to stay close to water and rest areas.
Recognizing those personality differences could help ranchers select herds that best meet grazing needs on rangelands, leading to better animal health and environmental conditions, according to a new paper from the University of California, Davis, published in the journal Applied Animal Behaviour Science.
“Cattle can actually be beneficial for the rangelands,” said lead author Maggie Creamer, who recently earned her Ph.D. in animal behavior at UC Davis. “Vegetation in rangelands actually need these kinds of disturbances like grazing.”
Ranchers can add elements to the rangeland such as water, mineral supplements and fencing to influence where cattle graze, but little research has been done on how those efforts affect individual cows. Considering personalities could save money.
“If you're spending all this money to add a management tool in order to change the distribution of your animals, that's a huge cost to ranchers,” said Creamer. “Thinking about other tools, or selecting certain animals with these grazing traits, might be a better way to optimize the distribution on rangeland rather than spending a bunch of money for something that may ultimately not pan out for all your animals.”
Effects of grazing
Livestock graze on an estimated 56 million acres in California, and healthy rangelands host native vegetation and animals, foster nutrient cycling and support carbon sequestration.
Uneven grazing can degrade water quality, soil health and habitats. Optimizing grazing — including the even spread of cow pies — can improve the ecosystem while also reducing fuel loads for wildfires.
To better understand individual grazing patterns, researchers went to the UC Sierra Foothill Research and Extension Center in Browns Valley and tracked 50 pregnant Angus and Hereford beef cows fitted with GPS collars.
The research
The cattle, which were tracked from June to August over two years, had access to 625 acres of grasslands and treed areas ranging in elevation from 600 to 2,028 feet. In the second year, a new watering site was added at a higher elevation.
Across the two years, the cows showed consistent and distinct grazing patterns even when water sources changed. Age and stage of pregnancy did not affect patterns, though cattle tended to clump near water and rest sites on hotter days.
The cows that ventured into higher elevations and farther from watering sites had more variability in their grazing patterns than those that stayed at lower elevations near water. That suggests it may be harder for non-wanderers to adjust to some landscapes.
“Thinking about the topography of your rangeland and your herd of cows can benefit both the animals and the sustainability of the land,” said Creamer, who next month begins work as a postdoctoral scholar in North Carolina.
Gauging personalities
Keying in on personality type may sound difficult, but the researchers also found some clues as to how to pinpoint the wanderers and homebodies. Unlike cattle at feedlots, the breeding cow population, especially on rangelands in California and other western states, live largely “wild” lives and are rarely handled, save for vaccinations and weaning.
Research due to be published later this year found that paying attention to individual cow reactions during those events can help determine personalities. The cows that appeared more passive during those handling interactions tended to be nomadic.
“We found that you can maybe predict those hill climbers if you kind of look at how they act when the veterinarian or rancher handle them,” said senior author Kristina Horback, an associate professor in the Department of Animal Science at UC Davis.
Informing practices
For ranchers, the findings could be invaluable, said Dan Macon, a livestock and natural resources Cooperative Extension advisor in Placer and Nevada counties for UC Agriculture and Natural Resources.
“Any time we can improve our understanding of cattle behavior, particularly at the individual level, it can improve how we handle livestock and manage the landscape,” he said.
Macon said that during the recent drought, it was hard to get cattle into higher country, but if ranchers could have selected the nomads, it may have saved money in terms of ranch labor and other efforts.
“If you ask a rancher who has been attentive to their cattle over many years, they know the personalities,” Macon said.
For Creamer and Horback, the research opens new doors into understanding herd behavior and dynamics, one that could be a cheaper alternative to high-tech solutions.
“Animal science tends to look overlook the mind of the animal when searching for solutions to challenges,” Horback said. “It's always been a direct line to genetics for immunity or nutrition, but nothing about the mind of the animal. And that's such a loss. There's so much we can learn from behavior in the end.”
The Russell L. Rustici Rangeland and Cattle Research Endowment supported the research.
This article was first published on the UC Davis News site.
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