Playback-elicited heterospecific aggressive responses in urbanized Sparkling Violetear are modulated in relation the risk of take-over hypothesis DOI Creative Commons

Luciana Tellería,

Álvaro Garitano‐Zavala

Frontiers in Ecology and Evolution, Journal Year: 2024, Volume and Issue: 12

Published: Sept. 4, 2024

Hummingbirds have crucial ecological importance in natural and human-altered habitats the Neotropics. Their unique biological characteristics imply a delicate energetic balance that drove evolution of species-specific dominance territorial behavior tactics that, turn, shape diversity composition nectarivorous communities. Understanding these factors could help improve conservation strategies, particularly important for eroding communities cities. Our objective is to evaluate whether species hummingbird, Sparkling Violetear ( Colibri coruscans ), able modulate its aggressive relation identity invades feeding territory, comparing between dry (relative depletion nectar resources) wet seasons, analyzing possible determine this response. Considering maximization energy efficiency, we hypothesize responses Violetears will vary territoriality behavioral each intruder species, season be greater compared season. We elicited with songs playbacks from four compose urban bird community, including their own characterizing eight behaviors varied intensity. quantified response two ways: number observation events which performed by constructing an “aggressiveness score” individual event. Territorial significantly intruding but seasonal effect was only observed, as more season, towards heterospecific playbacks. analyzed several hypotheses explain response, concluding “risk take-over” hypothesis, through wing morphology maneuverability, best explains modulation species. These results are useful planning if elucidate conditions promote coexistence subordinate dominant ones.

Language: Английский

Impacts of competition on juveniles of two sympatric freshwater prawn species from Pampean ecosystems: Palaemon argentinus and Macrobrachium borellii DOI

María Eugenia Scardamaglia,

Karine Delevati Colpo

Zoology, Journal Year: 2025, Volume and Issue: 170, P. 126268 - 126268

Published: April 16, 2025

Language: Английский

Citations

0
Competitive Behaviors Between Black Vultures (Coragyps atratus) and Turkey Vultures (Cathartes aura) During Scavenging DOI

Amanda M. Herbert,

Patrick A. Zollner, Landon R. Jones

et al.

Journal of Raptor Research, Journal Year: 2024, Volume and Issue: 58(4)

Published: Sept. 5, 2024

ABSTRACT Interference competition occurs when an individual prohibits another’s access to a resource through antagonistic interactions. Despite considerable research on scavenger interactions at carrion, the limited evidence for competitive between Black Vultures (Coragyps atratus) and Turkey (Cathartes aura) relies upon frequency of without considering other forms competition. Using remote cameras, we recorded duration aggression, scavenging, vigilance behaviors exhibited by scavenging stillborn domestic cattle carcasses within flocks composed one or both vulture species. We tested differences durations each behavior species, flock composition, combined effect species composition. Surprisingly, aggressive were rare their did not differ significantly based The clearest trends our comparisons revealed that aggression was longer in single-species flocks, whereas mixed-species flocks. presence multiple conspecifics heterospecifics vigilance. Our results indicated more toward than heterospecifics. findings identify complex ways which compete with Vultures, beyond simple aggression.

Language: Английский

Citations

2
Playback-elicited heterospecific aggressive responses in urbanized Sparkling Violetear are modulated in relation the risk of take-over hypothesis DOI Creative Commons

Luciana Tellería,

Álvaro Garitano‐Zavala

Frontiers in Ecology and Evolution, Journal Year: 2024, Volume and Issue: 12

Published: Sept. 4, 2024

Hummingbirds have crucial ecological importance in natural and human-altered habitats the Neotropics. Their unique biological characteristics imply a delicate energetic balance that drove evolution of species-specific dominance territorial behavior tactics that, turn, shape diversity composition nectarivorous communities. Understanding these factors could help improve conservation strategies, particularly important for eroding communities cities. Our objective is to evaluate whether species hummingbird, Sparkling Violetear ( Colibri coruscans ), able modulate its aggressive relation identity invades feeding territory, comparing between dry (relative depletion nectar resources) wet seasons, analyzing possible determine this response. Considering maximization energy efficiency, we hypothesize responses Violetears will vary territoriality behavioral each intruder species, season be greater compared season. We elicited with songs playbacks from four compose urban bird community, including their own characterizing eight behaviors varied intensity. quantified response two ways: number observation events which performed by constructing an “aggressiveness score” individual event. Territorial significantly intruding but seasonal effect was only observed, as more season, towards heterospecific playbacks. analyzed several hypotheses explain response, concluding “risk take-over” hypothesis, through wing morphology maneuverability, best explains modulation species. These results are useful planning if elucidate conditions promote coexistence subordinate dominant ones.

Language: Английский

Citations

0