Oyster Mortality Report France 2017

Update from Ifremer bulletin dated 28/08/17:

The average cumulative mortality rate for seed oysters in France is 63.7% on a national level with high regional fluctuation. This is 1 points higher than the previous month (see previous post) and also 2.1 points higher than the same bulletin last year: Last year’s 25/08/2016 bulletin recorded 61.6% as the national cumulative average.

Juvenile and adult oysters are reported as having much lower mortality rates (5.6% and 5.2% respectively) although higher than the previous bulletin (see previous).  However this remains inferior than juvenile and adult mortality rates for the same period in 2016 (11% and 6.1% respectively on 25/08/2016 bulletin).

Overall therefore according to the Ifremer monitoring programme up to end of August, seed mortalities are a little above 2016 levels where as juvenile and adult mortality rates are below last year’s levels.

Oyster Mortality Report France 2017

Update from Ifremer bulletin dated 27/07/17:

The average cumulative mortality rate for seed oysters in France is 62.7% on a national level with high regional fluctuation. This is 2 points higher than the previous month (see previous) and also 2 points higher than the same bulletin last year : The 27/07/2016 bulletin recorded 60.5% as the national cumulative average.

Juvenile and adult oysters are reported as having much lower mortality rates (4.2% and 3.5% respectively) although higher than the previous bulletin (see previous).  However this remains inferior than juvenile mortality rates for the same period in 2016 but above adult levels (6.5% for juvenile oysters and 2.8% for adult oysters on 27/07/2016 bulletin).

Overall therefore according to the Ifremer monitoring programme up to end of July, mortalities for both 2016 and 2017 show approximately similar rates.

Barfleur Season Suspended

The fishing season in Barfleur has been suspended again in 2017 for the 2nd season in a row due to high mortality and fishing zones described as« almost exhausted” (fishing commission).

Finnian O Luasa Bord Bia Paris

Oyster Mortality Report France 2017

 

Update from Ifremer bulletin dated 04/07/17:

Average cumulative mortality rate of 60.5% on national level for seed oysters with high regional fluctuation. Juvenile and adult oysters are reported as having much lower mortality rates (3.2% and 2.0% respectively) although higher than previous months

Update from Ifremer bulletin dated 31/05/17:
Average mortality rate of 27.9% on national level for seed oysters with high regional fluctuation (Thau 78%; Gefosse, Blainville, Cancale, Morlaix and Coupelasse < 1.4%).
Juvenile and adult oysters are reported as having much lower rates (1.2% and 0.9% respectively)

update from Ifremer bulletin 17/05:
1st seed oyster mortality rise observed by Ifremer in the South West (Arcachon – 25.6%) and in Brittany (Brest 26.1%). But the highest level of mortality in Thau at 77%. Juvenile and adults relatively spared for the moment.
Finnian O’Luasa, Bord Bia Paris