Abollo E, D'Amelio S, Pascual S
Area de Parasitología, Facultad de Ciencias, Universidad de Vigo, Spain.
Dis Aquat Organ. 2001 Jun 20;45(2):131-9. doi: 10.3354/dao045131.
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 larval infrapopulations 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 differentiation variability 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 then concluded 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 the paratenic host may provide larval infrapopulations with unique ecological factors probably influencing its recruitment to the final host populations.
在东北大西洋的温带水域中，通过限制性片段长度多态性鉴定了从3种转续宿主物种中采集的简单异尖线虫（Anisakis simplex sensu stricto）第三期幼虫。通过检查形态测量和生长特征来评估野生幼虫群体的状况。还研究了体外培养幼虫的分化模式和排泄/分泌产物。在从不同转续宿主来源采集的寄生虫幼虫之间发现了广泛的形态测量、生长和分化变异性。来自鱿鱼的线虫群体幼虫包括那些体型较小、存活率和蜕皮成功率最低的个体。因此可以得出结论，简单异尖线虫（A. simplex s. str.）幼虫在鱿鱼中的适应性并非最佳，这削弱了寄生虫的竞争力及其发育为成虫的机会。这表明转续宿主造成的微环境可能为幼虫群体提供了独特的生态因素，可能影响其向终末宿主群体的补充。
