Brain regions associated with visual cues are important for bird migration

Vincze, Orsolya; Vágási, Csongor I.; Pap, Péter L.; Osváth, Gergely; Møller, Anders Pape

doi:10.1098/rsbl.2015.0678

Cited by 25 publications

(25 citation statements)

References 27 publications

(37 reference statements)

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“…We collected measurements of brain mass from previously published datasets: Garamszegi et al (2007); Sol et al (2010); Galván and Møller (2011);Samia et al (2015); Vincze et al (2015); Møller and Erritzøe (2016), and Mlíkovský (1989a,b,c). Additionally, we obtained brain mass data by converting brain volume measurements (volume × density of fresh brain tissue −1.036 g/mL; Iwaniuk and Nelson, 2002) for two species (Accipiter cooperi and Chordeiles minor) from Iwaniuk and Nelson (2003).…”

Section: Data Collectionmentioning

confidence: 99%

Species With Greater Aerial Maneuverability Have Higher Frequency of Collisions With Aircraft: A Comparative Study

et al. 2018

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Antipredator responses may appear unsuccessful when animals are exposed to approaching vehicles, often resulting in mortality. Recent studies have addressed whether certain biological traits are associated with variation in collision risk with cars, but not with higher speed-vehicles like aircraft. Our goal was to establish the association between different species traits (i.e., body mass, eye size, brain size, wing loading, wing aspect ratio) and the frequency of bird collisions with aircraft (hereafter, bird strikes) using a comparative approach controlling for the effects of shared ancestry. We proposed directional predictions as to how each of the species traits would affect the frequency of bird strikes. Considering 39 bird species with all traits represented, the model containing wing loading had the best fit to account for the variance in bird strikes across species. In another model with 54 species exploring the fit to different polynomial models but considering only wing loading, we found that wing loading was negatively and linearly associated with the frequency of bird strikes. Counterintuitively, species with lower wing loading (hence, greater maneuverability) had a higher frequency of bird strikes. We discuss potential non-mutually exclusive explanations (e.g., high wing loading species fly faster, thus gaining some extra time to avoid the aircraft flight path; high wing loading species are hazed more intensively at airports, which could lower collisions, etc.). Ultimately, our findings uncovered that species with low wing loading get struck at a higher rate at airports, which reduces the safety risk for humans because these species tend not to cause damaging strikes, but the ecological consequences of their potentially higher local mortality are unknown.

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Section: Data Collectionmentioning

confidence: 99%

Species With Greater Aerial Maneuverability Have Higher Frequency of Collisions With Aircraft: A Comparative Study

et al. 2018

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“…; Vincze et al. ), and bats (McGuire and Ratcliffe ), as well as at the subspecies level in birds (Cristol et al. ; Pravosudov et al.…”

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confidence: 99%

Light enough to travel or wise enough to stay? Brain size evolution and migratory behavior in birds

Vincze

2016

Evolution

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Brain size relative to body size is smaller in migratory than in nonmigratory birds. Two mutually nonexclusive hypotheses had been proposed to explain this association. On the one hand, the "energetic trade-off hypothesis" claims that migratory species were selected to have smaller brains because of the interplay between neural tissue volume and migratory flight. On the other hand, the "behavioral flexibility hypothesis" argues that resident species are selected to have higher cognitive capacities, and therefore larger brains, to enable survival in harsh winters, or to deal with environmental seasonality. Here, I test the validity and setting of these two hypotheses using 1466 globally distributed bird species. First, I show that the negative association between migration distance and relative brain size is very robust across species and phylogeny. Second, I provide strong support for the energetic trade-off hypothesis, by showing the validity of the trade-off among long-distance migratory species alone. Third, using resident and short-distance migratory species, I demonstrate that environmental harshness is associated with enlarged relative brain size, therefore arguably better cognition. My study provides the strongest comparative support to date for both the energetic trade-off and the behavioral flexibility hypotheses, and highlights that both mechanisms contribute to brain size evolution, but on different ends of the migratory spectrum.

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“…However, several studies have shown that obtaining the residuals from a linear regression to remove the effect of one variable and perform subsequent analysis with these residuals is not appropriate [Darlington and Smulders, 2001;García-Berthou, 2001;Freckleton, 2002]. These studies have advocated the use of general linear models (GLMs) that incorporate the effect to be removed as a covariate (see Moore et al [2011], Dale et al [2015] or Vincze et al [2015] for examples of this related to brain structures or relative brain size). In the case of Lindsay et al [2015], this would mean using a GLM with display complexity as the dependent variable and body and brain size as covariates, not the two-step procedure that Lindsay et al [2015] used.…”

mentioning

confidence: 99%

Relative Brain Size Is Not Correlated with Display Complexity in Manakins: A Reanalysis of Lindsay et al. (2015)

Gutiérrez-Ibáñez

Iwaniuk²,

Wylie³

2016

Brain Behav Evol

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Brain regions associated with visual cues are important for bird migration

Cited by 25 publications

References 27 publications

Species With Greater Aerial Maneuverability Have Higher Frequency of Collisions With Aircraft: A Comparative Study

Species With Greater Aerial Maneuverability Have Higher Frequency of Collisions With Aircraft: A Comparative Study

Light enough to travel or wise enough to stay? Brain size evolution and migratory behavior in birds

Relative Brain Size Is Not Correlated with Display Complexity in Manakins: A Reanalysis of Lindsay et al. (2015)

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