Ancestral Sperm Ecotypes Reveal Multiple Invasions of a Non-Native Fish in Northern Europe.

ABSTRACT: For externally fertilising organisms in the aquatic environment, the abiotic fertilisation medium can be a strong selecting force. Among bony fishes, sperm are adapted to function in a narrow salinity range. A notable exception is the family Gobiidae, where several species reproduce across a wide salinity range. The family also contains several wide-spread invasive species. To better understand how these fishes tolerate such varying conditions, we measured sperm performance in relation to salinity from a freshwater and a brackish population within their ancestral Ponto-Caspian region of the round goby, Neogobius melanostomus. These two ancestral populations were then compared to nine additional invaded sites across northern Europe, both in terms of their sperm traits and by using genomic S

SUBMITTER: Green L 

PROVIDER: S-EPMC8304145 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature