Maladaptive migration behaviour in hybrids links to predator-mediated ecological selection
Pärssinen, Varpu LU ; Hulthén, Kaj LU ; Brönmark, Christer LU ; Skov, Christian LU ; Brodersen, Jakob LU ; Baktoft, Henrik ; Chapman, Ben B. LU ; Hansson, Lars Anders LU
and Nilsson, Per Anders
LU
(2020)
In Journal of Animal Ecology
89(11).
p.2596-2604
- Abstract
Different migratory species have evolved distinct migratory characteristics that improve fitness in their particular ecological niches. However, when such species hybridize, migratory traits from parental species can combine maladaptively and cause hybrids to fall between parental fitness peaks, with potential consequences for hybrid viability and species integrity. Here, we take advantage of a natural cross-breeding incident to study migratory behaviour in naturally occurring hybrids as well as in their parental species and explore links between migratory traits and predation risk. To achieve this, we used electronic tags and passive telemetry to record detailed individual migration patterns (timing and number of migratory trips) in... (More)
Different migratory species have evolved distinct migratory characteristics that improve fitness in their particular ecological niches. However, when such species hybridize, migratory traits from parental species can combine maladaptively and cause hybrids to fall between parental fitness peaks, with potential consequences for hybrid viability and species integrity. Here, we take advantage of a natural cross-breeding incident to study migratory behaviour in naturally occurring hybrids as well as in their parental species and explore links between migratory traits and predation risk. To achieve this, we used electronic tags and passive telemetry to record detailed individual migration patterns (timing and number of migratory trips) in two common freshwater fish species, roach Rutilus rutilus, common bream Abramis brama as well as their hybrids. Next, we scanned for tags regurgitated by a key avian predator (great cormorant Phalacrocorax carbo) at nearby roosting sites, allowing us to directly link migratory behaviour to predation risk in the wild. We found that hybrid individuals showed a higher number of short, multi-trip movements between lake and stream habitats as compared to both parental species. The mean date of first lake departure differed between bream and roach by more than 10 days, while hybrids departed in two distinct peaks that overlapped with the parental species' averages. Moreover, the probability of cormorant predation increased with multi-trip movement frequency across species and was higher for hybrids. Our data provide novel insights into hybrid viability, with links to predator-mediated ecological selection. Increased exposure to predators via maladaptive migratory behaviour reduces hybrid survival and can thereby reinforce species integrity.
(Less)
- author
- Pärssinen, Varpu
LU
; Hulthén, Kaj
LU
; Brönmark, Christer
LU
; Skov, Christian
LU
; Brodersen, Jakob
LU
; Baktoft, Henrik
; Chapman, Ben B.
LU
; Hansson, Lars Anders
LU
and Nilsson, Per Anders
LU
- organization
- publishing date
- 2020-11-01
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- fish, hybrid viability, partial migration, predator–prey, species integrity
- in
- Journal of Animal Ecology
- volume
- 89
- issue
- 11
- pages
- 9 pages
- publisher
- Wiley-Blackwell
- external identifiers
-
- pmid:32745243
- scopus:85089659196
- ISSN
- 0021-8790
- DOI
- 10.1111/1365-2656.13308
- language
- English
- LU publication?
- yes
- id
- f084f40c-a7e3-467d-bca4-33600128c37d
- date added to LUP
- 2021-01-15 08:10:34
- date last changed
- 2024-04-18 00:55:44
@article{f084f40c-a7e3-467d-bca4-33600128c37d,
abstract = {{<p>Different migratory species have evolved distinct migratory characteristics that improve fitness in their particular ecological niches. However, when such species hybridize, migratory traits from parental species can combine maladaptively and cause hybrids to fall between parental fitness peaks, with potential consequences for hybrid viability and species integrity. Here, we take advantage of a natural cross-breeding incident to study migratory behaviour in naturally occurring hybrids as well as in their parental species and explore links between migratory traits and predation risk. To achieve this, we used electronic tags and passive telemetry to record detailed individual migration patterns (timing and number of migratory trips) in two common freshwater fish species, roach Rutilus rutilus, common bream Abramis brama as well as their hybrids. Next, we scanned for tags regurgitated by a key avian predator (great cormorant Phalacrocorax carbo) at nearby roosting sites, allowing us to directly link migratory behaviour to predation risk in the wild. We found that hybrid individuals showed a higher number of short, multi-trip movements between lake and stream habitats as compared to both parental species. The mean date of first lake departure differed between bream and roach by more than 10 days, while hybrids departed in two distinct peaks that overlapped with the parental species' averages. Moreover, the probability of cormorant predation increased with multi-trip movement frequency across species and was higher for hybrids. Our data provide novel insights into hybrid viability, with links to predator-mediated ecological selection. Increased exposure to predators via maladaptive migratory behaviour reduces hybrid survival and can thereby reinforce species integrity.</p>}},
author = {{Pärssinen, Varpu and Hulthén, Kaj and Brönmark, Christer and Skov, Christian and Brodersen, Jakob and Baktoft, Henrik and Chapman, Ben B. and Hansson, Lars Anders and Nilsson, Per Anders}},
issn = {{0021-8790}},
keywords = {{fish; hybrid viability; partial migration; predator–prey; species integrity}},
language = {{eng}},
month = {{11}},
number = {{11}},
pages = {{2596--2604}},
publisher = {{Wiley-Blackwell}},
series = {{Journal of Animal Ecology}},
title = {{Maladaptive migration behaviour in hybrids links to predator-mediated ecological selection}},
url = {{http://dx.doi.org/10.1111/1365-2656.13308}},
doi = {{10.1111/1365-2656.13308}},
volume = {{89}},
year = {{2020}},
}