Hunting in the dark by a peregrine falcon (Falco peregrinus)

Hirata, Kazuhiko; Nakahama, Shota; Yoshioka, Toshirou

doi:10.2478/srj-2013-0002

Cited by 4 publications

(1 citation statement)

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“…While falcons are normally active in daytime, their hunting under relatively low-light conditions (e.g. crepuscularity) has been frequently reported 35 36 37 38 , supporting our molecular result. Adaptation to crepuscularity would result in selection for dim-light vision in falcons, and thus in addition to our molecular results we would expect their diurnal and crepuscular activities to also be reflected by their eye morphology (e.g.…”

Section: Resultssupporting

confidence: 87%

Retinal transcriptome sequencing sheds light on the adaptation to nocturnal and diurnal lifestyles in raptors

Hadly

Teng

et al. 2016

Sci Rep

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Owls (Strigiformes) represent a fascinating group of birds that are the ecological night-time counterparts to diurnal raptors (Accipitriformes). The nocturnality of owls, unusual within birds, has favored an exceptional visual system that is highly tuned for hunting at night, yet the molecular basis for this adaptation is lacking. Here, using a comparative evolutionary analysis of 120 vision genes obtained by retinal transcriptome sequencing, we found strong positive selection for low-light vision genes in owls, which contributes to their remarkable nocturnal vision. Not surprisingly, we detected gene loss of the violet/ultraviolet-sensitive opsin (SWS1) in all owls we studied, but two other color vision genes, the red-sensitive LWS and the blue-sensitive SWS2, were found to be under strong positive selection, which may be linked to the spectral tunings of these genes toward maximizing photon absorption in crepuscular conditions. We also detected the only other positively selected genes associated with motion detection in falcons and positively selected genes associated with bright-light vision and eye protection in other diurnal raptors (Accipitriformes). Our results suggest the adaptive evolution of vision genes reflect differentiated activity time and distinct hunting behaviors.

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Section: Resultssupporting

confidence: 87%

Retinal transcriptome sequencing sheds light on the adaptation to nocturnal and diurnal lifestyles in raptors

Hadly

Teng

et al. 2016

Sci Rep

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Leonardi¹

2020

Behavioural Ecology of Western Palearctic Falcons

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Widespread nocturnality of living birds stemming from their common ancestor

2019

BMC Evol Biol

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Background Many living birds exhibit some nocturnal activity, but the genetic basis and evolutionary origins of their nocturnality remain unknown. Results Here, we used a molecular phyloecological approach to analyze the adaptive evolution of 33 phototransduction genes in diverse bird lineages. Our results suggest that functional enhancement of two night-vision genes, namely, GRK1 and SLC24A1, underlies the nocturnal adaption of living birds. Further analyses showed that the diel activity patterns of birds have remained relatively unchanged since their common ancestor, suggesting that the widespread nocturnal activity of many living birds may largely stem from their common ancestor rather than independent evolution. Despite this evolutionary conservation of diel activity patterns in birds, photoresponse recovery genes were found to be frequently subjected to positive selection in diverse bird lineages, suggesting that birds generally have evolved an increased capacity for motion detection. Moreover, we detected positive selection on both dim-light vision genes and bright-light vision genes in the class Aves, suggesting divergent evolution of the vision of birds from that of reptiles and that different bird lineages have evolved certain visual adaptions to their specific light conditions. Conclusions This study suggests that the widespread nocturnality of extant birds has a deep evolutionary origin tracing back to their common ancestor.

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Hunting in the dark by a peregrine falcon (Falco peregrinus)

Abstract: . 180-185. The article extends the conference paper with additional definitions for modeling processes, strategy, and culture, since the previous paper only dealt with structure. The new article now provides a complete framework for modeling reorganization of MAS architecture.

Cited by 4 publications

References 14 publications

Retinal transcriptome sequencing sheds light on the adaptation to nocturnal and diurnal lifestyles in raptors

Retinal transcriptome sequencing sheds light on the adaptation to nocturnal and diurnal lifestyles in raptors

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Widespread nocturnality of living birds stemming from their common ancestor

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