Till sidans topp

Sidansvarig: Webbredaktion
Sidan uppdaterades: 2012-09-11 15:12

Tipsa en vän
Utskriftsversion

Evidence of rapid adaptiv… - Göteborgs universitet Till startsida
Webbkarta
Till innehåll Läs mer om hur kakor används på gu.se

Evidence of rapid adaptive trait change to local salinity in the sperm of an invasive fish

Artikel i vetenskaplig tidskrift
Författare Leon Green
Jonathan N. Havenhand
Charlotta Kvarnemo
Publicerad i Evolutionary Applications
ISSN 1752-4571
Publiceringsår 2019
Publicerad vid Institutionen för marina vetenskaper
Linnécentrum för marin evolutionsbiologi (CEMEB)
Institutionen för biologi och miljövetenskap
Språk en
Länkar dx.doi.org/10.1111/eva.12859
Ämnesord Baltic Sea, immigrant reproductive dysfunction, invasion biology, local adaptation, Neogobius melanostomus, salinity, spermatozoa, goby neogobius-melanostomus, round goby, phenotypic plasticity, life-history, baltic sea, gadus-morhua, atlantic cod, adaptation, egg, fertilization, Evolutionary Biology
Ämneskategorier Marin ekologi

Sammanfattning

Invasive species may quickly colonize novel environments, which could be attributed to both phenotypic plasticity and an ability to locally adapt. Reproductive traits are expected to be under strong selection when the new environment limits reproductive success of the invading species. This may be especially important for external fertilizers, which release sperm and eggs into the new environment. Despite adult tolerance to high salinity, the invasive fish Neogobius melanostomus (round goby) is absent from fully marine regions of the Baltic Sea, raising the possibility that its distribution is limited by tolerance during earlier life stages. Here, we investigate the hypothesis that the spread of N. melanostomus is limited by sperm function in novel salinities. We sampled sperm from two invasion fronts with higher and lower salinities in the Baltic Sea and tested them across a range of salinity levels. We found that sperm velocity and percentage of motile sperm declined in salinity levels higher and lower than those currently experienced by the Baltic Sea populations, with different performance curves for the two fronts. Sperm velocity also peaked closer to the home salinity conditions in each respective invasion front, with older localities showing an increased fit to local conditions. By calculating how the sperm velocity has changed over generations, we show this phenotypic shift to be in the range of other fish species under strong selection, indicating ongoing local adaptation or epigenetic acclimation to their novel environment. These results show that while immigrant reproductive dysfunction appears to at least partly limit the distribution of invasive N. melanostomus in the Baltic Sea, local adaptation to novel environments could enable future spread beyond their current boundaries.

Sidansvarig: Webbredaktion|Sidan uppdaterades: 2012-09-11
Dela:

På Göteborgs universitet använder vi kakor (cookies) för att webbplatsen ska fungera på ett bra sätt för dig. Genom att surfa vidare godkänner du att vi använder kakor.  Vad är kakor?