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The monarch butterfly in Mexico: a conservation model
Current Opinion in Insect Science, 2023Each fall, millions of monarch butterflies (Danaus plexippus L.) travel from Canada and the United States to overwinter in Mexico and California. In 2022, the IUCN listed migratory monarchs as endangered because of their population decline. The main accepted drivers are widespread use of herbicides, effects of climate, and land use change that causes ...
Eduardo Rendón-Salinas +4 more
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The case of the monarch butterfly: a verdict is returned [PDF]
Trends in Genetics, 2002 A publication reporting the harmful effects on the monarch butterfly of maize genetically modified to express insecticidal delta-endotoxins from the soil bacterium Bacillus thuringiensis (Bt) caused much public interest. A series of ecologically based studies were subsequently carried out to evaluate rigorously the impact of pollen from such crops and ...
Gatehouse AM, Ferry N, Raemaekers RJM
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Inbreeding depression in monarch butterflies
Journal of Insect Conservation, 2016Monarch butterflies and their unique system of multigenerational migration have long fascinated the public, and concerns for the fate of this charismatic insect have grown due to the consistent declines in overwintering colony size over the last 20 years.
Jacobus C. de Roode +4 more
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Effect of mating on Monarch butterfly oogenesis
Experientia, 1977Oogenesis ceases in virgin Monarch butterflies at about 10 days posteclosion, but an enhanced production of mature oocytes occurs after mating. Juvenile hormone injections into virgins, and allatectomies of mated females, indicate that the observed fluctuations in oogenesis are due to periods of corpora allata activity and inactivity.
J. F. Barker, W. S. Herman
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Tracking climate impacts on the migratory monarch butterfly [PDF]
Global Change Biology, 2012 AbstractUnderstanding the impacts of climate on migratory species is complicated by the fact that these species travel through several climates that may be changing in diverse ways throughout their complete migratory cycle. Most studies are not designed to tease out the direct and indirect effects of climate at various stages along the migration route.
Elise F. Zipkin +5 more
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Monarch butterfly spatially discrete advection model
Mathematical Biosciences, 2004We study the population cycles of the Monarch butterfly using one of the simplest systems incorporating both migration and local dynamics. The annual migration of the Monarch involves four generations. Members of Generations 1-3 (occasionally 4) migrate from the over-wintering site in Central Mexico to breeding grounds that extend as far north as the ...
Abdul-Aziz Yakubu +3 more
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The monarch butterfly's sperm wars
New Scientist, 2009The male butterfly's penis seems to work like an oil dipstick to judge how much enemy sperm the female has in ...
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Illuminating the Circadian Clock in Monarch Butterfly Migration
Science, 2003Migratory monarch butterflies use a time-compensated Sun compass to navigate to their overwintering grounds in Mexico. Here, we report that constant light, which disrupts circadian clock function at both the behavioral and molecular levels in monarchs, also disrupts the time-compensated component of flight navigation.
Froy, Oren +3 more
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