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Evaluating temperature- and host-dependent reproduction in the parasitic freshwater mussel Unio crassus

Schneider, Lea D.; Nilsson, Anders LU and Österling, E. Martin (2017) In Hydrobiologia
Abstract

Adaptation to temperature regimes and host presence may enhance fitness in parasites. In an experimental study, we evaluated the timing of glochidia release by Unio crassus subjected to three spring water temperature regimes in the presence and absence of the host fish Cottus gobio. The timing of glochidia release was delayed at (i) constantly low temperatures (<10°C), in contrast to earlier and pronounced releases at (ii) natural temperature increases that level off at intermediate temperatures (10–15°C), and (iii) higher-than-normal temperatures (10–20°C). Mussels from treatment (i) that had not released glochidia during the experiment did so soon after being moved to the temperature in (ii), indicating a temperature threshold for... (More)

Adaptation to temperature regimes and host presence may enhance fitness in parasites. In an experimental study, we evaluated the timing of glochidia release by Unio crassus subjected to three spring water temperature regimes in the presence and absence of the host fish Cottus gobio. The timing of glochidia release was delayed at (i) constantly low temperatures (<10°C), in contrast to earlier and pronounced releases at (ii) natural temperature increases that level off at intermediate temperatures (10–15°C), and (iii) higher-than-normal temperatures (10–20°C). Mussels from treatment (i) that had not released glochidia during the experiment did so soon after being moved to the temperature in (ii), indicating a temperature threshold for glochidia release. Neither host fish presence nor the combined effect of temperature and host fish presence significantly affected the timing of glochidia release. The treatment with natural spring water temperatures indicated possible fitness benefits for U. crassus through combined effects of high intensities of glochidia releases and high survival of released glochidia. The furthered understanding of climate change effects on mussel and host phenology in seasonal environments, potentially inducing temporal mismatches of glochidia release to host availability, is key to mussel conservation.

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author
organization
publishing date
type
Contribution to journal
publication status
epub
subject
keywords
Freshwater mussel conservation, Glochidia release, Glochidia survival, Temperature fluctuations
in
Hydrobiologia
pages
11 pages
publisher
Springer
external identifiers
  • scopus:85018672495
ISSN
0018-8158
DOI
10.1007/s10750-017-3217-0
language
English
LU publication?
yes
id
25f58712-72d7-46ca-888a-a5f87bca10eb
date added to LUP
2017-05-24 07:57:48
date last changed
2018-03-04 05:02:12
@article{25f58712-72d7-46ca-888a-a5f87bca10eb,
  abstract     = {<p>Adaptation to temperature regimes and host presence may enhance fitness in parasites. In an experimental study, we evaluated the timing of glochidia release by Unio crassus subjected to three spring water temperature regimes in the presence and absence of the host fish Cottus gobio. The timing of glochidia release was delayed at (i) constantly low temperatures (&lt;10°C), in contrast to earlier and pronounced releases at (ii) natural temperature increases that level off at intermediate temperatures (10–15°C), and (iii) higher-than-normal temperatures (10–20°C). Mussels from treatment (i) that had not released glochidia during the experiment did so soon after being moved to the temperature in (ii), indicating a temperature threshold for glochidia release. Neither host fish presence nor the combined effect of temperature and host fish presence significantly affected the timing of glochidia release. The treatment with natural spring water temperatures indicated possible fitness benefits for U. crassus through combined effects of high intensities of glochidia releases and high survival of released glochidia. The furthered understanding of climate change effects on mussel and host phenology in seasonal environments, potentially inducing temporal mismatches of glochidia release to host availability, is key to mussel conservation.</p>},
  author       = {Schneider, Lea D. and Nilsson, Anders and Österling, E. Martin},
  issn         = {0018-8158},
  keyword      = {Freshwater mussel conservation,Glochidia release,Glochidia survival,Temperature fluctuations},
  language     = {eng},
  month        = {05},
  pages        = {11},
  publisher    = {Springer},
  series       = {Hydrobiologia},
  title        = {Evaluating temperature- and host-dependent reproduction in the parasitic freshwater mussel Unio crassus},
  url          = {http://dx.doi.org/10.1007/s10750-017-3217-0},
  year         = {2017},
}