Graduate School of Science and Engineering, Kagoshima University, 1-21-35 Korimoto, Kagoshima, 890-0065, Japan.
Graduate School of Integrated Sciences for Life, Hiroshima University, 1-4-4 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8528, Japan.
Syst Parasitol. 2021 Dec;98(5-6):625-640. doi: 10.1007/s11230-021-10001-9. Epub 2021 Sep 16.
The blue mackerel Scomber australasicus is one of the major commercial fishes consumed in southern Japan. Three species of parasitic copepods were collected from S. australasicus in the East China Sea off the west coast of Kyushu Island, southern Japan. These copepods are each characterized based on the females: Pumiliopes scombri (Bomolochidae) differs from its congeners by the presence of fine ventral spinules on legs 2 to 4; Colobomatus itoui n. sp. (Philichthyidae) is characterized by having the cephalosome with a pair of dorsal hemispherical cephalic protrusions but without an apical cephalic process and the anal somite with a pair of posterolateral protrusions with a smooth tip; and Caligus kanagurta (Caligidae) is distinguishable from its congeners accommodated in the Caligus diaphanus-group by bearing an atypical bulged leg 4 with long protruded pectens. The collection of C. kanagurta in Japanese waters represents its new country record. Parasitic copepods reported from S. australasicus and its related species S. japonicus from the western Pacific Ocean are tabulated.LSID urn:lsid:zoobank.org:pub:382569AD-5188-4443-AAA8-1C2DB4FE2689.
蓝圆鲹 Scomber australasicus 是日本南部主要食用的商业鱼类之一。在日本九州岛西海岸外的东海从 S. australasicus 中采集到了三种寄生桡足类。这些桡足类雌性个体的特征如下：Pumiliopes scombri（Bomolochidae）与同属种的区别在于腿 2 到 4 上有细小的腹刺；新种 Colobomatus itoui n. sp.（Philichthyidae）的特征是头胸部有一对背半球形的头突，但没有顶头突，肛节有一对后外侧突起，顶端光滑；Caligus kanagurta（Caligidae）与归入 Caligus diaphanus 组的同属种不同，其第 4 腿呈非典型膨大成带长突出栉的形状。在日本水域采集到的 C. kanagurta 代表了它的新国家记录。表列出了从蓝圆鲹及其相关的太平洋西部的日本竹荚鱼 S. japonicus 中报告的寄生桡足类。
