Curtis M A
J Wildl Dis. 1981 Apr;17(2):241-6. doi: 10.7589/0090-3558-17.2.241.
All 175 ninespine sticklebacks, Pungitius pungitius (Linné), collected from the Belcher Islands were parasitized by Diplostomum spathaceum (Rudolphi) and 43% by Schistocephalus sp. D. spathaceum metacercariae were mostly confined to a dorso-ventral band encircling the lens of the eye, and were concentrated in the anterio-dorsal sector of this band. The central area of the lens was thus relatively free of diplostomula, probably minimizing interference with the vision of the fish. The frequency distribution of D. spathaceum abundance in P. pungitius was closely approximated by a negative binomial, while that for Schistocephalus was best fitted by a Poisson. None of the fish condition factors examined appeared related to the intensity of the parasitic infections.
从贝尔彻群岛采集的175条九棘刺鱼（Pungitius pungitius，林奈）均被匙形双腔吸虫（Rudolphi）寄生，43%被裂头绦虫属寄生。匙形双腔吸虫的尾蚴大多局限于环绕眼球晶状体的背腹带，并集中在该带的前背部分。晶状体的中心区域因此相对没有双腔蚴，这可能使对鱼视力的干扰最小化。匙形双腔吸虫在九棘刺鱼中的丰度频率分布非常接近负二项分布，而裂头绦虫的分布最适合泊松分布。所检查的鱼类状况因素均未显示与寄生虫感染强度有关。
