Results 51 to 60 of about 8,878 (215)

Photoperiodic diapause under the control of circadian clock genes in an insect [PDF]

open access: yes, 2010
Background Most organisms have evolved a circadian clock in order to anticipate daily environmental changes and many of these organisms are also capable of sophisticated measurement of daylength (photoperiodism) that is used to regulate ...
Tomoko Ikeno   +3 more
core   +1 more source

Reintroduction of an Endangered Butterfly, the Mottled Duskywing (Erynnis martialis)

open access: yesAnimal Conservation, EarlyView.
We reintroduced Mottled Duskywing (Erynnis martialis), an endangered skipper butterfly, at different life‐stages to restored oak savanna habitat in Ontario, Canada and then performed intensive post‐release monitoring. Our results show that, at one of three sites, a population was established within two years of initiating releases and that pupae and ...
Michelle Polley   +7 more
wiley   +1 more source

Photoperiod‐Regulated Thermal Tolerance of the Non‐Diapausing Insect Ceratitis capitata (Diptera: Tephritidae)

open access: yesEntomologia Experimentalis et Applicata, EarlyView.
Developmental photoperiodic exposure (photoacclimation) from egg to adult emergence alters thermal tolerance in Ceratitis capitata. Flies reared under contrasting photoperiods (0:24, 8:16, 14:10, and 24:0 L:D) showed significant shifts in both CTmin and CTmax, whereas adult‐only photoacclimation affected CTmax but not CTmin.
Antonis G. Papadopoulos   +1 more
wiley   +1 more source

Water availability and land‐use shape the diversity of Odonata in the Middle East

open access: yesInsect Conservation and Diversity, EarlyView.
Odonata diversity in the Middle East depends on the availability of long‐lasting waters, emphasizing the importance of preserving stable aquatic habitats for biodiversity conservation under climate change‐driven droughts. Agricultural expansion is associated with increased Odonata species richness, but overall trait diversity remains limited ...
Zohreh Eslami Barzoki, Jonathan Chase
wiley   +1 more source

A year-round study on digestive enzymes in the Arctic copepod Calanus glacialis: implications for its capability to adjust to changing environmental conditions [PDF]

open access: yes, 2016
The biomass of zooplankton communities in Arctic shelf regions is dominated by the calanoid copepod Calanus glacialis . This species spends the winter in deep water, and then, metabolic rates are low.
Freese, Daniela   +2 more
core   +1 more source

Conservation implications of shifting habitat use in migrating insects: Selection patterns in a threatened damselfly show that season‐specific actions are needed

open access: yesInsect Conservation and Diversity, EarlyView.
Well‐preserved heathlands of NW Italy are the main overwintering habitat of Sympecma paedisca, while grassy margins in farmland are used only in summer and are avoided from autumn onwards. Grassy margins in farmland act as corridors during the species' migrations between its breeding (ricefields) and overwintering (lowland heathlands) grounds ...
Leonardo Siddi   +3 more
wiley   +1 more source

Role of a gamma-aminobutryic acid (GABA) receptor mutation in the evolution and spread of Diabrotica virgifera virgifera resistance to cyclodiene insecticides [PDF]

open access: yes, 2013
The western corn rootworm, Diabrotica virgifera virgifera, is a damaging pest of cultivated corn that was controlled by applications of cyclodiene insecticides from the late 1940s until resistance evolved ∼10 years later. Range expansion from the western
Chen, H.   +6 more
core   +3 more sources

Seasonal changes in the intensity of adult diapause in a parasitoid wasp, Ooencyrtus nezarae Ishii (Hymenoptera: Encyrtidae).

open access: yesApplied Entomology and Zoology, 2000
Eggs of Riptortus clavatus parasitized by Ooencyrtus nezarae were placed in an outdoor cage in Osaka City from early September to late October at intervals of about 10 days. The female adults of O. nezarae emerging from these hosts were transferred to 25°C and 16L-8D at intervals of about 30 days and their oviposition was recorded.
Takeshi Teraoka, Hideharu Numata
openaire   +2 more sources

A protracted phenology: Post‐diapause larval development of a threatened butterfly

open access: yesInsect Conservation and Diversity, EarlyView.
Larval survival during diapause was high; hibernaculum webs were mostly located near Succisa pratensis plants, which often retained vital leaves through winter. Post‐diapause developmental time varied strongly depending on exposure to different microclimates, being reduced by litter cover, solar radiation and a higher heat load index.
Gwydion Scherer, Thomas Fartmann
wiley   +1 more source

Daily Rhythms of Sex Pheromone Emission and Courtship Behaviour in the Neotropical Brown Stink Bug Euschistus heros

open access: yesJournal of Applied Entomology, EarlyView.
ABSTRACT Understanding the chemical and behavioural ecology of the Neotropical brown stink bug, Euschistus heros (Hemiptera: Pentatomidae), is essential for developing effective integrated pest management (IPM) strategies in South American soybean production. This study investigated the courtship behaviour and diel periodicity of sex pheromone emission.
Felipe Goulart Gonçalves   +3 more
wiley   +1 more source

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