2016
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Asymmetric competition over calling sites in two closely related treefrog species
Abstract: Interspecific competition occurs when one species using a resource limits the use of that resource by another species. A dominance relationship between the species competing over a resource may result in asymmetric competition. Here, we tested the hypothesis that two sympatric treefrog species, the endangered Hyla suweonensis and the abundant H. japonica, compete with each other over calling sites. We observed the locations of calling individuals of the two treefrog species in rice paddies and tested whether r… Show more
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“…There were no differences in rice paddy or border preference between the two treefrog species. The only inter-species difference found was the distance to the bank ( D. japonicus closer to all types compared to D. suweonensis ), which is in line with the results of Borzée et al ( 2016b ). Based on the results, we can conclude that the type and characteristics of rice paddy borders do not affect the competition for calling locations between the two species.…”
Section: Discussionsupporting
confidence: 92%
Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD).
Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD.
The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC).
Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.
“…There were no differences in rice paddy or border preference between the two treefrog species. The only inter-species difference found was the distance to the bank ( D. japonicus closer to all types compared to D. suweonensis ), which is in line with the results of Borzée et al ( 2016b ). Based on the results, we can conclude that the type and characteristics of rice paddy borders do not affect the competition for calling locations between the two species.…”
Section: Discussionsupporting
confidence: 92%
Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD).
Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD.
The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC).
Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.
“…We noticed that in the mutual inhibitory consortium the dominance of either strain is hard to reverse once established (Figure a, cases II and III). This phenomenon agrees with ecological observations of the mutual-inhibition competition ecosystems. The amensalism topology may accommodate temporary dominance and be reversed (Figure a cases I and II) due to biased growth speed and inhibition. However, the mutual inhibition competition topology forms positive feedback loops which enhance the dominance once established.…”
Section: Resultssupporting
confidence: 87%
Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD).
Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD.
The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC).
Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.
“…Our observations report a second type of competition between Dryophytes japonicus and D. suweonensis: interference competition for calling sites, in non-natural conditions. At the difference with other studies (Kim, 2015;Borzée et al, 2016b), there was an overlap between the maximum distance to the edge of the submerged field for D. japonicus and the minimum distance to the edge for D. suweonensis. This overlap likely results from the hydric stress bringing all frogs together in an area where a ruptured water pipe flooded a fallow field.…”
Section: Discussioncontrasting
confidence: 84%
“…This is also the highest number of D. suweonensis reported at a single calling site, and thus resulting in interference competition for a rarefied resource. We expect the size of the site not to be the key to the interpretation of these results, as segregation at smaller sites has been observed (Borzée et al, 2016b). However, the object of the competition, i.e.…”
Section: Discussionmentioning
confidence: 85%
Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD).
Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD.
The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC).
Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.
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