Results 21 to 30 of about 17,379 (258)

Mitochondrial DNA Variation in Monarch Butterflies [PDF]

open access: yesEvolution, 1991
The natural history and ecology of the monarch butterfly (Danaus plexippus L.) have been studied extensively (Ackery and Vane-Wright, 1984). The nearly cosmopolitan monarch is best known for the massive migration undertaken each autumn by North American populations.
A V Z, Brower, T M, Boyce
openaire   +2 more sources

Native Habitats for Monarch Butterflies in South Florida

open access: yesEDIS, 2009
WEC266, a 5-page illustrated fact sheet by Rebecca G. Harvey, Patricia L. Howell, Carol Morgenstern, and Frank J. Mazzotti, describes the unique migration of the monarch butterfly, an “endangered natural phenomenon,” the monarch population in Florida ...
Rebecca G. Harvey   +3 more
doaj   +5 more sources

Spatio-Temporal Distribution of Monarch Butterflies Along Their Migratory Route

open access: yesFrontiers in Ecology and Evolution, 2019
Efforts to conserve the migratory phenomenon of monarch butterflies in eastern North America have increased since a 2013–2014 monitoring report documenting a historical population low at the Monarch Butterfly Biosphere Reserve in Mexico.
Saul Castañeda   +5 more
doaj   +1 more source

Optimization driven cluster based indexing and matching for the document retrieval

open access: yesJournal of King Saud University: Computer and Information Sciences, 2022
Document retrieval methods concentrate on minimizing the time taken for the navigator to recall the entire document while analyzing the concepts, themes, and contents of the document based on their research goals.
Mamta Kayest, Sanjay Kumar Jain
doaj   +1 more source

Two Observations of Predation on Lepidoptera [PDF]

open access: yes, 2017
(excerpt) During the early afternoon of 25 August, 1977, a large European mantid, Mantis religiosa Linnaeus, was observed feeding on an adult male monarch butterfly, Donaus p.
Leeuw, Irwin
core   +3 more sources

Siamese Learning-Based Monarch Butterfly Localization

open access: yes2022 IEEE Data Science and Learning Workshop (DSLW), 2022
2022 IEEE Data Science and Learning Workshop (DSLW)
Shoouri, Sara   +9 more
openaire   +2 more sources

Effects on Monarch Butterfly Larvae (Lepidoptera: Danaidae) After Continuous Exposure to Cry1Ab-Expressing Corn During Anthesis [PDF]

open access: yes, 2004
Effects on monarch butterfly, Danaus plexippus L., after continuous exposure of larvae to natural deposits of Bacillus thuringiensis (Bt) and non-Bt pollen on milkweed, were measured in five studies.
Anderson, Patricia   +8 more
core   +3 more sources

Preventing a Risk/Risk Trade-off: An Analysis of the Measures Necessary to Increase U.S. Pollinator Numbers [PDF]

open access: yes, 2017
This Note will proceed in four parts. Part II will discuss the importance of pollinators and the possible reasons for their declining numbers. Part III will delve into the current and proposed actions to increase pollinator populations that are taking ...
Acchiardo Vallejo, Camila
core   +2 more sources

Polarized Light Helps Monarch Butterflies Navigate [PDF]

open access: yesCurrent Biology, 2004
During their spectacular migratory journey in the fall, North American monarch butterflies (Danaus plexippus) use a time-compensated sun compass to help them navigate to their overwintering sites in central Mexico. One feature of the sun compass mechanism not fully explored in monarchs is the sunlight-dependent parameters used to navigate.
Reppert, Steven M.   +2 more
openaire   +3 more sources

Use of Spotted Knapweed/Star Thistle (Asterales: Asteraceae) as the Primary Source of Nectar by Early Migrating Monarch Butterflies (Lepidoptera: Nymphalidae) from Beaver Island, Michigan [PDF]

open access: yes, 2019
Recent observations over the past decade suggest that the invasive star thistle (aka spotted knapweed (Centaurea stoebe L.) provides much of the nectar that supports monarch butterflies (Danaus plexippus) in their pre-migratory and early migratory flight
Douglas, Matthew M
core   +2 more sources

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