Amerikansk snegl Haminella solitaria (Say, 1822) har etableret sig i Roskilde Fjord.
American cephalaspidean sea slug now established in Roskilde Fjord The non-indigenous cephalaspidean sea slug Haminella solitaria was discovered for the first time in Danish waters in August 2020. It was collected near the marina in Kulhuse at the northern end of Roskilde Fjord in shallow water, whe...
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| Format: | Article in Journal/Newspaper |
| Language: | Danish |
| Published: |
2022
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| Online Access: | https://curis.ku.dk/portal/da/publications/amerikansk-snegl-haminella-solitariasay-1822-har-etableret-sig-i-roskilde-fjord(0a1c2f8d-6f4e-4028-8e3d-d73f3b447ba0).html https://curis.ku.dk/ws/files/340367396/FloraogFauna2022_3_6.pdf |
| Summary: | American cephalaspidean sea slug now established in Roskilde Fjord The non-indigenous cephalaspidean sea slug Haminella solitaria was discovered for the first time in Danish waters in August 2020. It was collected near the marina in Kulhuse at the northern end of Roskilde Fjord in shallow water, where it occurred through September along with its gelatinous egg masses, In the summer of 2021 it was found from late July through September, but not in May or June. Further localities in 2021, Norsminde Fjord (N Belt Sea), Gyldensteen Lagune (north coast Fyn), Lendrup Lagune (Limfjord) and Helnæs (SW coast of Fyn) have been obtained from colleagues in Aarhus, Odense and Roskilde, and a photo- graphic record of egg masses from the Limfjord indicates that it has been present since 2018. Haminella solitaria is a Northwest Atlantic species, which was first observed in European waters in the summer of 2016 at the Baltic coast of Germany. It is a small greyish sea slug, called “paper (or glass) bubble-shell”, with a thin, fragile, white, partly transparent shell, which is almost completely covered by tissue folds from the head, foot and mantle. The shell length in specimens from Kulhuse ranged from 4 to 11 mm. Its egg mass is gelatinous, almost spherical and attached to the sub- strate by a short stalk. American cephalaspidean sea slug now established in Roskilde Fjord The non-indigenous cephalaspidean sea slug Haminella solitaria was discovered for the first time in Danish waters in August 2020. It was collected near the marina in Kulhuse at the northern end of Roskilde Fjord in shallow water, where it occurred through September along with its gelatinous egg masses, In the summer of 2021 it was found from late July through September, but not in May or June. Further localities in 2021, Norsminde Fjord (N Belt Sea), Gyldensteen Lagune (north coast Fyn), Lendrup Lagune (Limfjord) and Helnæs (SW coast of Fyn) have been obtained from colleagues in Aarhus, Odense and Roskilde, and a photo- graphic record of egg masses from the ... |
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