Fitness of the marine parasitic nematode Anisakis simplex s.str. in temperate waters of the NE Atlantic

Diseases of Aquatic Organisms

Elvira Abollo¹  Santiago Pascual¹  Stefano D¹Amelio¹ 

关键词: Anisakis simplex s.str.;    Fitness;    Recruitment;   

DOI  :  10.3354/dao045131

学科分类：生物科学（综合）

来源: Inter-Research

【 摘 要 】

ABSTRACT: In temperate waters of the NE Atlantic, third-stage larvae of Anisakis simplex sensu stricto collected from 3 paratenic host species were identified by restriction fragment length polymorphisms. The condition of wild larvalinfrapopulations was assessed by examining morphometric and growth characteristics. The differentiation patterns and the excretory/secretory products of larvae grown in vitro were also examined. An extensive morphometric, growth and differentiationvariability was found between parasite larvae collected from different paratenic host sources. Nematode infrapopulation larvae from the squid comprise those smaller individuals with the lowest values of survival rates and moult success. It may be thenconcluded that the fitness of A. simplex s.str. larvae is not the best possible in the squid, which impaired the competitiveness of the parasite and its chances of developing into an adult. This suggests that the microenvironments impaired by theparatenic host may provide larval infrapopulations with unique ecological factors probably influencing its recruitment to the final host populations.

【 授权许可】

Unknown