scholarly journals Unusual Winter Activity Observations of Two Newt Species (Ommatotriton ophryticus & Triturus ivanbureschi) from the Anatolian Peninsula

2021 ◽  
Vol 7 (2) ◽  
pp. 337-342
Author(s):  
Muammer KURNAZ ◽  
Mehmet Kürşat ŞAHİN
Keyword(s):  
Winter Activity ◽  
Anatolian Peninsula

scholarly journals Environmental correlates and energetics of winter flight by bats in southern Alberta, Canada

2016 ◽  
Vol 94 (12) ◽  
pp. 829-836 ◽  
Author(s):  
B.J. Klüg-Baerwald ◽  
L.E. Gower ◽  
C.L. Lausen ◽  
R.M. Brigham
Keyword(s):  
Heat Loss ◽  
Barometric Pressure ◽  
Myotis Lucifugus ◽  
Energetic Cost ◽  
Cold Temperatures ◽  
Bat Activity ◽  
Environmental Correlates ◽  
Interspecific Differences ◽  
Winter Activity ◽  
Species Specific

Winter activity of bats is common, yet poorly understood. Other studies suggest a relationship between winter activity and ambient temperature, particularly temperature at sunset. We recorded echolocation calls to determine correlates of hourly bat activity in Dinosaur Provincial Park, Alberta, Canada. We documented bat activity in temperatures as low as −10.4 °C. We observed big brown bats (Eptesicus fuscus (Palisot de Beauvois, 1796)) flying at colder temperatures than species of Myotis bats (genus Myotis Kaup, 1829). We show that temperature and wind are important predictors of winter activity by E. fuscus and Myotis, and that Myotis may also use changes in barometric pressure to cue activity. In the absence of foraging opportunity, we suggest these environmental factors relate to heat loss and thus the energetic cost of flight. To understand the energetic consequences of bat flight in cold temperatures, we estimated energy expenditure during winter flights of E. fuscus and little brown myotis (Myotis lucifugus (Le Conte, 1831)) using species-specific parameters. We estimated that winter flight uses considerable fat stores and that flight thermogenesis could mitigate energetic costs by 20% or more. We also show that temperature-dependent interspecific differences in winter activity likely stem from differences between species in heat loss and potential for activity–thermoregulatory heat substitution.

Effect of Moonlight on Winter Activity of Showshoe Hares

1991 ◽  
Vol 23 (1) ◽  
pp. 61 ◽  
Author(s):  
B. Scott Gilbert ◽  
Stan Boutin
Keyword(s):  
Winter Activity

THE DISTRIBUTION OF DERMACENTOR TICKS IN CANADA IN RELATION TO BIOCLIMATIC ZONES

1967 ◽  
Vol 45 (4) ◽  
pp. 517-537 ◽  
Author(s):  
P. R. Wilkinson
Keyword(s):  
British Columbia ◽  
Deciduous Forest ◽  
Strong Association ◽  
Eastern Deciduous Forest ◽  
Egg Development ◽  
The North ◽  
Winter Activity ◽  
Bioclimatic Zone ◽  
Soil Temperatures ◽  
Time Of Year

Dermacentor andersoni has been collected north of Jasper, Alberta, close to 54° N. and near 53° N. in British Columbia. Spread to the north and northwest is probably limited by low summer soil temperatures, which would act principally by slowing egg development, thus disrupting the seasonal cycle of the tick. To the southwest, mild winters may fail to release diapause at the correct time of year. Aspect and slope are important factors. Altitude spread of records is from 1000–7000 ft. The most generally applicable description of its distribution is the ecotone between western grassland and moister regions, including clearings and rocky outcrops m the montane and Columbia forests, and shrubby areas of the prairies. In British Columbia, a series of randomly selected transects indicated a strong association between the tick's presence and several species of shrubs growing without tree shade.Each bioclimatic zone tends to have a characteristic group of rodents as main hosts of the immature stages. The prairie and montane regions differ in the indigenous hosts available to the adult tick.East of 105° D. andersoni is replaced by D. variabilis, which is adapted to the more humid summers of the eastern deciduous forest zones, and differs considerably from D. andersoni in its phenology. There are no reliable records of indigenous D. variabilis north of 52° latitude.D. albipictus occurs from the east to the west coast. Because of the winter activity of its larvae, allowing the whole summer for egg development, it is able to penetrate much farther north than the other two species. There are two records close to 60° latitude.

Winter Activity of Red Squirrels in Interior Alaska

1958 ◽  
Vol 39 (3) ◽  
pp. 443 ◽  
Author(s):  
William O. Pruitt ◽  
Charles V. Lucier
Keyword(s):  
Red Squirrels ◽  
Winter Activity ◽  
Interior Alaska

Seasonal patterns of breeding activity of Atlantic Rainforest anurans at Boracéia, Southeastern Brazil

2002 ◽  
Vol 23 (2) ◽  
pp. 161-167 ◽  
Author(s):  
Miguel Trefaut Rodrigues ◽  
Jaime Bertoluci
Keyword(s):  
Atlantic Rainforest ◽  
Southeastern Brazil ◽  
Seasonal Patterns ◽  
Breeding Activity ◽  
Monthly Temperature ◽  
Anuran Species ◽  
Number Of Species ◽  
Winter Activity ◽  
Calling Activity ◽  
Breeding Seasons

AbstractAnnual patterns of breeding activity of 28 anuran species were studied at Boracéia, an Atlantic Rainforest locality in the coastal mountains of Southeastern Brazil. Five patterns were evident: (1) species that call year-round; (2) opportunistic calling activity associated with rainfall; (3) explosive breeding; (4) winter activity; and (5) summer species with variable breeding seasons. The number of species with calling males was positively correlated with mean monthly temperature.

scholarly journals Winter activity unrelated to introgression in British bumblebee Bombus terrestris audax

Apidologie ◽  
2020 ◽  
Author(s):  
Alex F. Hart ◽  
Kevin Maebe ◽  
Gordon Brown ◽  
Guy Smagghe ◽  
Thomas Ings
Keyword(s):  
Population Structure ◽  
Microsatellite Loci ◽  
Bombus Terrestris ◽  
Geographic Range ◽  
Wild Populations ◽  
Local Adaptations ◽  
Winter Activity ◽  
Study Population

AbstractBombus terrestris is a bumblebee with a wide geographic range, with subspecies showing a variety of local adaptations. Global export of commercially-reared B. terrestris started in the 1980s; the bees are a mixture of subspecies bred for ease of rearing, bivoltinism and large nests. This paper investigated whether the increase in bivoltinism in UK resident B. terrestris audax populations was related to introgression with imported foreign subspecies. Workers were collected from wild populations in London and Bristol, as well as two commercial suppliers. Fourteen microsatellite loci were used to study population structure, hybridisation and introgression. No introgression with commercial B. t. dalmatinus was detected in wild populations. Hence, the increase in winter activity appears unrelated to introgression.

Winter activity of common bream (Abramis brama L.) in a European reservoir

2018 ◽  
Vol 25 (3) ◽  
pp. 163-171
Author(s):  
P. Jurajda ◽  
K. Roche ◽  
K. Halačka ◽  
M. Mrkvová ◽  
J. Zukal
Keyword(s):  
Abramis Brama ◽  
Winter Activity ◽  
Bream Abramis Brama ◽  
Common Bream ◽  
Common Bream Abramis Brama
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