Affiliation:
1. AZTI, Marine Research, Basque Research and Technology Alliance (BRTA)
Abstract
Abstract
The European anchovy Engraulis encrasicholus is one of the most commercial important species in the Bay of Biscay (ICES Subarea 8). We analysed the temporal mean abundance of Anisakis spp. larvae species in anchovies from ICES subarea 8 in 2000, 2001, 2014-2016, 2019-2023. Prevalence, mean abundance and intensity were examined by length classes. Prevalence in adults was only 1% in 2000 but increased to 90% in 2014. Since 2015 prevalence has decreased; and 17.6 % of individuals were affected in 2023. Mean abundance showed a similar trend, with a peak of 3.79 nematodes/anchovy in 2014, which fell to 0.21 in 2023. The species A. simplex (s.s.) and A. pegreffii were identified by the PCR/SANGER sequencing and PCR/RLFP size ITS fragments techniques in 2019 and 2020. Anisakis simplex sensu stricto was the most abundant species, accounting by these two techniques for 61 to 64 % of total nematodes in 2019 and 52% in 2020.
Publisher
Research Square Platform LLC
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