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Interdisciplinary approaches at early invasion stages maximise the evidence on human-induced and climate-driven fish dispersal
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Interdisciplinary approaches at early invasion stages maximise the evidence on human-induced and climate-driven fish dispersal
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Journal Article
Interdisciplinary approaches at early invasion stages maximise the evidence on human-induced and climate-driven fish dispersal
2025
Overview
Species range shifts have manifold consequences on the biota and functioning of recipient ecosystems. A thorough assessment at early dispersal stages may effectively contribute to foreseeing the outcomes implied. Here we capitalised on a combination of interdisciplinary tools to investigate the taxonomy, native ranges, invasion pathways, and impacts of four fish samples exotic to the Mediterranean. These are
Zenopsis conchifer
and
Ephippion guttifer
, two neonative species from the Atlantic, and
Epinephelus striatus
and “
Siganus
clade C”, two new non-indigenous species (NIS) that are respectively critically endangered in the central-western Atlantic and potentially undescribed and native to the eastern Indo-Pacific. Faunal, molecular, and parasitological analyses suggested that neonatives still had an extra-Mediterranean origin, whereas NIS arrived through shipping. Dietary analyses showed that
E. guttifer
and
E. striatus
fed on multiple trophic levels and survived in the area of introduction scavenging on fisheries discards. This study contributes to solving taxonomic issues, shows how stomach content metabarcoding and parasite biotagging can aid monitoring species dispersal, and highlights the potential role of bycatch dumping in NIS spread. Finally, it emphasises how interdisciplinary approaches maximise evidence and proposes a workflow that may be applied to similar circumstances worldwide.
