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Predator ontogeny affects expression of inducible defense morphology in rotifers

Zhang, Huan LU ; Brönmark, Christer LU and Hansson, Lars Anders LU (2017) In Ecology 98(10). p.2499-2505
Abstract

Many prey organisms show induced morphological responses to predators including changes in protective spine length, such as in rotifers, although previous studies have mainly focused on how prey become larger than the predator gape-size optimum. Here we show that a large-sized predator makes prey rotifers escape below the gape-size optimum of the predator by reducing spine length. In experiments and field studies we show that during part of their ontogeny fish larvae feed intensively on the common rotifer Keratella cochlearis, and that larval fish predation reduces rotifer spine length both through induction of shorter spines and selective predation on long-spined individuals. We also describe a global scale pattern in spine length of... (More)

Many prey organisms show induced morphological responses to predators including changes in protective spine length, such as in rotifers, although previous studies have mainly focused on how prey become larger than the predator gape-size optimum. Here we show that a large-sized predator makes prey rotifers escape below the gape-size optimum of the predator by reducing spine length. In experiments and field studies we show that during part of their ontogeny fish larvae feed intensively on the common rotifer Keratella cochlearis, and that larval fish predation reduces rotifer spine length both through induction of shorter spines and selective predation on long-spined individuals. We also describe a global scale pattern in spine length of K. cochlearis, showing an increasing variance in spine length with latitude. This pattern may be explained by differences in fish reproduction from once per year at high latitudes to several times per year at lower latitudes. That spine length is adaptively adjusted to the ontogeny of a dominant predator taxa provides a novel view on our understanding of factors affecting temporal and spatial variations in prey defense morphology.

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Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
fish larvae, gape size, inducible defense, Keratella cochlearis, morphology, ontogeny, predator, prey, rotifer
in
Ecology
volume
98
issue
10
pages
2499 - 2505
publisher
Ecological Society of America
external identifiers
  • scopus:85034581404
ISSN
0012-9658
DOI
10.1002/ecy.1957
language
English
LU publication?
yes
id
7cb53be1-0346-4b7a-a047-8581ad5aa404
date added to LUP
2019-05-24 10:09:09
date last changed
2019-07-16 04:10:04
@article{7cb53be1-0346-4b7a-a047-8581ad5aa404,
  abstract     = {<p>Many prey organisms show induced morphological responses to predators including changes in protective spine length, such as in rotifers, although previous studies have mainly focused on how prey become larger than the predator gape-size optimum. Here we show that a large-sized predator makes prey rotifers escape below the gape-size optimum of the predator by reducing spine length. In experiments and field studies we show that during part of their ontogeny fish larvae feed intensively on the common rotifer Keratella cochlearis, and that larval fish predation reduces rotifer spine length both through induction of shorter spines and selective predation on long-spined individuals. We also describe a global scale pattern in spine length of K. cochlearis, showing an increasing variance in spine length with latitude. This pattern may be explained by differences in fish reproduction from once per year at high latitudes to several times per year at lower latitudes. That spine length is adaptively adjusted to the ontogeny of a dominant predator taxa provides a novel view on our understanding of factors affecting temporal and spatial variations in prey defense morphology.</p>},
  author       = {Zhang, Huan and Brönmark, Christer and Hansson, Lars Anders},
  issn         = {0012-9658},
  keyword      = {fish larvae,gape size,inducible defense,Keratella cochlearis,morphology,ontogeny,predator,prey,rotifer},
  language     = {eng},
  month        = {07},
  number       = {10},
  pages        = {2499--2505},
  publisher    = {Ecological Society of America},
  series       = {Ecology},
  title        = {Predator ontogeny affects expression of inducible defense morphology in rotifers},
  url          = {http://dx.doi.org/10.1002/ecy.1957},
  volume       = {98},
  year         = {2017},
}