10.5061/DRYAD.6DJH9W10Z
Green, Leon
0000-0002-3328-3655
University of Gothenburg
Niemax, Jan
Universität Hamburg
Herrmann, Jens-Peter
Universität Hamburg
Temming, Axel
Universität Hamburg
Behrens, Jane W.
Technical University of Denmark
Havenhand, Jonathan N.
University of Gothenburg
Leder, Erica
University of Gothenburg
Kvarnemo, Charlotta
University of Gothenburg
Data from: Sperm performance limits the reproduction of an invasive fish
in novel salinities
Dryad
dataset
2021
Apollonia melanostoma
condition sensitivity
exotic species
Gobiidae
reaction norms
Linnaeus Centre for Marine Evolutionary Biology*
Swedish Research Council*
2016-03343
BONUS (BIO-C3 project)*
Art 185
Letterstedt’s Fellowship Trust*
Jacobsson’s Family Trust*
Wåhlströms Family Trust*
Linnaeus Centre for Marine Evolutionary Biology
Swedish Research Council
https://ror.org/03zttf063
2016-03343
BONUS (BIO-C3 project)
Art 185
Letterstedt’s Fellowship Trust
Jacobsson’s Family Trust
Wåhlströms Family Trust
2021-03-01T00:00:00Z
2021-03-01T00:00:00Z
en
39051 bytes
3
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Aim: The few fish species able to reproduce across wide osmotic ranges
either plastically acclimate sperm performance to, or are locally adapted
to, different salinities. The invasive round goby (Neogobius melanostomus)
is spreading in Eurasia and the Americas, into both fresh and brackish
water. We aim to understand if reproduction in different salinities is
affected an ability to acclimate. Location: Brackish and freshwater
systems of northern Europe and the Baltic Sea. Methods: We cross-exposed
round gobies from freshwater and brackish origin to 0 and 16 practical
salinity units (PSU), and the fish were given nest boxes to spawn. After
four weeks, we measured their sperm performance in both 0 and 16 PSU,
fertilization success of each clutch was measured through visual analysis
of eggs. Clutches were split and allowed to develop in both 0 and 16 PSU
salinity, and reproductive success (zygote development) was measured 20±1
days later. Responses were analyzed using generalized mixed models.
Results: After a month, the fish showed no plasticity in sperm performance
to their acclimation salinity, regardless of their origin. Sperm velocity
was highest in the salinity similar to the males’ origin. Significantly
lower fertilization success was measured for individuals that reproduced
outside their salinity of origin despite recurring spawning events in all
treatment groups. Among fertilized eggs, zygote development was similar
regardless of salinity treatment of either eggs or parents. Main
Conclusions: Short-term acclimation to new salinities does not affect
sperm performance in the round goby. Alternative hypotheses such as local
adaption should be further investigated. Limits to the species’
reproductive success, and therefore invasion processes, are likely
dependent on environment-phenotype matches. Fish of brackish origin
spawned successfully in freshwater, pointing to an increased risk of
introducing populations of brackish origin into freshwater.
See associated Open Access paper for methodology.
Please see ReadMe file.