@article{oai:nagasaki-u.repo.nii.ac.jp:00007168,
 author = {田中, 於菟彦 and 飯塚, 昭二},
 journal = {長崎大学水産学部研究報告, Bulletin of the Faculty of Fisheries, Nagasaki University},
 month = {Jan},
 note = {There are two types in "Surume-ika" of Tusima I., namely atumn-type and winter-type, and the differences between them are as follow. 1. In average, autumn-type is ca. 20mm. longer in the mantle length than winter-type in both sexes. 2. Autumn-group is under the control of female, while in winter-group, the sexual ratio is almost 1. 3. Both ovary and testis in autumn-group are almost mature, but those of winter-group are not so, the greater part of them are inmature. To explain the ecological meaning between them is the chief problem of our study, but still not clear now., 長崎大学水産学部研究報告, v.4, pp.31-40; 1956},
 pages = {31--40},
 title = {九州北西水域に於けるスルメイカに就て : 特に対馬に於ける"彼岸イカ"と"寒イカ"及び春期出現する稚仔と未成個体に関する報告},
 volume = {4},
 year = {1956}
}