Zobrazeno 1 - 10
of 72
pro vyhledávání: '"Ronalds Krams"'
Autor:
Tatjana Krama, Māris Munkevics, Ronalds Krams, Tatjana Grigorjeva, Giedrius Trakimas, Priit Jõers, Sergejs Popovs, Krists Zants, Didzis Elferts, Markus J. Rantala, Eriks Sledevskis, Jorge Contreras-Garduño, Benjamin L. de Bivort, Indrikis A. Krams
Publikováno v:
Frontiers in Behavioral Neuroscience, Vol 18 (2024)
Externí odkaz:
https://doaj.org/article/0ada0e301a76470b869d094806622a05
Publikováno v:
Frontiers in Psychiatry, Vol 15 (2024)
IntroductionAlthough some findings indicate that yoga can reduce stress and anxiety, many studies present mixed results. The potential of yoga interventions to alleviate anxiety, including the mechanisms and boundary conditions by which it does so, i
Externí odkaz:
https://doaj.org/article/6fcc17b433d74583b2141c4f33f75782
Autor:
Tatjana Krama, Ronalds Krams, Sergejs Popovs, Giedrius Trakimas, Markus J. Rantala, Todd M. Freeberg, Indrikis A. Krams
Publikováno v:
Birds, Vol 4, Iss 2, Pp 225-235 (2023)
The optimal body mass hypothesis posits that the body reserves of wintering birds are balanced between the risk of starvation and predation. In this study, we tested whether the body mass of wintering Great Tits (Parus major) was higher under conditi
Externí odkaz:
https://doaj.org/article/39eb7676e1024104bb5057d015560709
Autor:
Tatjana Krama, Māris Munkevics, Ronalds Krams, Tatjana Grigorjeva, Giedrius Trakimas, Priit Jõers, Sergejs Popovs, Krists Zants, Didzis Elferts, Markus J. Rantala, Eriks Sledevskis, Jorge Contreras-Garduño, Benjamin L. de Bivort, Indrikis A. Krams
Publikováno v:
Frontiers in Behavioral Neuroscience, Vol 17 (2023)
The development of high-throughput behavioral assays, where numerous individual animals can be analyzed in various experimental conditions, has facilitated the study of animal personality. Previous research showed that isogenic Drosophila melanogaste
Externí odkaz:
https://doaj.org/article/5554ae9f03db459481ad985e6823ab4a
Autor:
Ronalds Krams, Tatjana Krama, Didzis Elferts, Janīna Daukšte, Patrīcija Raibarte, Guntis Brūmelis, Iluta Dauškane, Linda Strode, Indrikis A. Krams
Publikováno v:
Birds, Vol 3, Iss 2, Pp 221-233 (2022)
Blood parasites are considered to have strong negative effects on host fitness. Negative fitness consequences may be associated with proximity to areas where blood parasite vectors reproduce. This study tested for relationships between haemosporidian
Externí odkaz:
https://doaj.org/article/ae3e7a817c054226a3db69013dc18a60
Autor:
Tatjana Krama, Ronalds Krams, Maris Munkevics, Jonathan Willow, Sergejs Popovs, Didzis Elferts, Linda Dobkeviča, Patrīcija Raibarte, Markus Rantala, Jorge Contreras-Garduño, Indrikis A. Krams
Publikováno v:
PeerJ, Vol 10, p e12953 (2022)
Free-living organisms face multiple stressors in their habitats, and habitat quality often affects development and life history traits. Increasing pressures of agricultural intensification have been shown to influence diversity and abundance of insec
Externí odkaz:
https://doaj.org/article/e28eb4cebc79465c9e0cd5e01a5f1b61
Autor:
Ronalds Krams, Māris Munkevics, Sergejs Popovs, Linda Dobkeviča, Jonathan Willow, Jorge Contreras Garduño, Tatjana Krama, Indrikis A. Krams
Publikováno v:
Frontiers in Physiology, Vol 12 (2021)
Ecological stoichiometry is important for revealing how the composition of chemical elements of organisms is influenced by their physiological functions and ecology. In this study, we investigated the elemental body composition of queens, workers, an
Externí odkaz:
https://doaj.org/article/e895f8cd0fb545d082f4d593a4349795
Autor:
Indrikis A. Krams, Tatjana Krama, Ronalds Krams, Giedrius Trakimas, Sergejs Popovs, Priit Jõers, Maris Munkevics, Didzis Elferts, Markus J. Rantala, Jānis Makņa, Benjamin L. de Bivort
Publikováno v:
Frontiers in Behavioral Neuroscience, Vol 15 (2021)
When organisms’ environmental conditions vary unpredictably in time, it can be advantageous for individuals to hedge their phenotypic bets. It has been shown that a bet-hedging strategy possibly underlies the high inter-individual diversity of phot
Externí odkaz:
https://doaj.org/article/2133b7eb41c64be4808b6a8dcac203d7
Autor:
Ronalds Krams, Dita Gudra, Sergejs Popovs, Jonathan Willow, Tatjana Krama, Maris Munkevics, Kaspars Megnis, Priit Jõers, Davids Fridmanis, Jorge Contreras Garduño, Indrikis A. Krams
Publikováno v:
Insects, Vol 13, Iss 1, p 98 (2022)
Bumblebees are key pollinators in agricultural landscapes. However, little is known about how gut microbial communities respond to anthropogenic changes. We used commercially produced colonies of buff-tailed bumblebees (Bombus terrestris) placed in t
Externí odkaz:
https://doaj.org/article/98b19c756c36422c8684ac778df3e078
Publikováno v:
Philosophical Transactions of the Royal Society B: Biological Sciences. 378
Animals adjust their use of alarm calls depending on social environments. We tested whether dominant (adult) and subordinate (juvenile non-kin) male crested tits ( Lophophanes cristatus ) warn each other and heterospecific willow tits ( Poecile monta