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Hippocampal volume does not correlate with food-hoarding rates in the Black-capped Chickadee (Poecile atricapillus) and Willow Tit (Parus montanus)

Brodin, Anders LU (2005) In The Auk 122(3). p.819-828
Abstract
Food-hoarding birds use memory to relocate caches, and species that store thousands of scattered food items must have an extraordinary memory capacity to be able to relocate them. Because the hippocampus is important in the functioning of spatial memory, it is logical to assume that the amount of food stored should correlate with hippocampal volume. Previously, food-hoarding capacity has been used as the predictor variable for hippocampal volume. Using the opposite approach, I tested whether hippocampal volume can be used to predict the amount of food stored. The atricapilla complex, a superspecies in the Paridae, has a wide Holarctic distribution, with the Black-capped Chickadee (Poecile atricapillus) in America and the Willow Tit (Parus... (More)
Food-hoarding birds use memory to relocate caches, and species that store thousands of scattered food items must have an extraordinary memory capacity to be able to relocate them. Because the hippocampus is important in the functioning of spatial memory, it is logical to assume that the amount of food stored should correlate with hippocampal volume. Previously, food-hoarding capacity has been used as the predictor variable for hippocampal volume. Using the opposite approach, I tested whether hippocampal volume can be used to predict the amount of food stored. The atricapilla complex, a superspecies in the Paridae, has a wide Holarctic distribution, with the Black-capped Chickadee (Poecile atricapillus) in America and the Willow Tit (Parus montanus) in Eurasia. Although they live in similar ecological conditions, the Willow Tit possesses a hippocampus almost twice the size of the Black-capped Chickadee's. I sampled hoarding intensities in Black-capped Chickadees in British Columbia with the same methods I used previously in Willow Tits in Sweden. Contrary to expectation, Black-capped Chickadees stored at the same high rates as Willow Tits, which suggests that both species are large-scale hoarders. I discuss possible explanations for why the difference in hippocampal volume did not translate into differences in food-hoarding rates. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
The Auk
volume
122
issue
3
pages
819 - 828
publisher
BioOne
external identifiers
  • wos:000230984600008
  • scopus:23044501785
ISSN
0004-8038
DOI
10.1642/0004-8038(2005)122[0819:HVDNCW]2.0.CO;2
language
English
LU publication?
yes
id
6a181621-6569-476e-a061-b30aa9a84558 (old id 147389)
date added to LUP
2007-07-03 11:10:07
date last changed
2017-10-01 04:34:43
@article{6a181621-6569-476e-a061-b30aa9a84558,
  abstract     = {Food-hoarding birds use memory to relocate caches, and species that store thousands of scattered food items must have an extraordinary memory capacity to be able to relocate them. Because the hippocampus is important in the functioning of spatial memory, it is logical to assume that the amount of food stored should correlate with hippocampal volume. Previously, food-hoarding capacity has been used as the predictor variable for hippocampal volume. Using the opposite approach, I tested whether hippocampal volume can be used to predict the amount of food stored. The atricapilla complex, a superspecies in the Paridae, has a wide Holarctic distribution, with the Black-capped Chickadee (Poecile atricapillus) in America and the Willow Tit (Parus montanus) in Eurasia. Although they live in similar ecological conditions, the Willow Tit possesses a hippocampus almost twice the size of the Black-capped Chickadee's. I sampled hoarding intensities in Black-capped Chickadees in British Columbia with the same methods I used previously in Willow Tits in Sweden. Contrary to expectation, Black-capped Chickadees stored at the same high rates as Willow Tits, which suggests that both species are large-scale hoarders. I discuss possible explanations for why the difference in hippocampal volume did not translate into differences in food-hoarding rates.},
  author       = {Brodin, Anders},
  issn         = {0004-8038},
  language     = {eng},
  number       = {3},
  pages        = {819--828},
  publisher    = {BioOne},
  series       = {The Auk},
  title        = {Hippocampal volume does not correlate with food-hoarding rates in the Black-capped Chickadee (Poecile atricapillus) and Willow Tit (Parus montanus)},
  url          = {http://dx.doi.org/10.1642/0004-8038(2005)122[0819:HVDNCW]2.0.CO;2},
  volume       = {122},
  year         = {2005},
}