Donax, Linnaeus, 1758
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publication ID |
https://doi.org/ 10.1186/s13071-018-2692-0 |
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persistent identifier |
https://treatment.plazi.org/id/122BEB52-FF95-FFB3-FF4D-5B06B081FE27 |
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treatment provided by |
Felipe |
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scientific name |
Donax |
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Description of Donax View in CoL mortality events
In 2010, important mortality events of Donax trunculus were reported in three different wild beds: Quiberon Bay, Oléron Island and Audierne Bay. The mortality rate was estimated between 70 and 80% according to the site. In 2011, new increased mortality events occurred in two locations: Audierne Bay (same site as 2010) and Douarnenez Bay. The mortality rate was also high ( Fig. 1 View Fig ). In all cases, the mortality was uniform, massive, sudden and concerned Donax trunculus of all ages; no other species were affected by these mortality events. The mortality occurred during summer and the beginning of autumn (no mortality was reported at the other periods of the year) and mortality events lasted from 2 weecs to 1 month, according to fishermen. No specific environmental event, such as algal bloom, was reported in 2010 and 2011. Similar observations were made during the mortality event occurring in September 2008 in Quiberon Bay.
The sampled individuals were mainly moribund, except for the Audierne 2010 sample where most individuals were alive; this sample was collected after the mortality event. Moribund animals were characterized by a very slow closing of their valves and a limited intrapalleal fluid. Individuals showed no specific macroscopic signs and in particular, no signs such as pustules, conchyolin deposit or necrosis and degradation of the hinge were observed.
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