九州西方海域産小型歯鯨類の研究―12 : 長崎県橘湾沿岸で捕獲されたスナメリについて

• Main Authors: 水江 一弘, 吉田 主基, 正木 康昭
• Format: Report
• Language: Japanese
• Published: 長崎大学水産学部 1965
• Subjects: Nares; Olden; toothed whales
• Online Access: http://hdl.handle.net/10069/31550; https://nagasaki-u.repo.nii.ac.jp/?action=repository_uri&item_id=8757; https://nagasaki-u.repo.nii.ac.jp/?action=repository_action_common_download&item_id=8757&item_no=1&attribute_id=18&file_no=1

As a result of the investigation of eighteen Neomeris phocaenoides CUVIER which had beed caught in the coast of Tachibana Bay and landed at Nagasaki fish-market, the following characteristics have been ascertained. 1. The body color of this species is, in general, silver-grey, but is slightly light in its color in the part from the front of the larynx nearly to the anus. Their body color is usually changed to black, when it is made into sample by the fixation or left as it is. Therefore it has been mistakenly reported since olden time that the fresh body color of this species is black. 2. The head of this species is smaller than that of other species, with no snout. The forehead part and upper lip are similar to those of Globicephala melaena. And this whale has no dorsal fin but has a rising growing in wide line at the back, in exchange for the dorsal fin, and many little dots are found in that rising. The histological section of the rising, through the epidermal dot, is shown in Plate IN-15. 3. The percentage of the fins to the body length in this species is larger than that of other species; and the posterior margin of the pectoral fin does not take the wave from. 4. In other kinds of the little toothed whales, the growth of body length is believed to be almost due to the growth of the tail part of such whales as Tursiops sp. and Pseudorca sp., but the growth of the body-length of this species is due to the growth of the abdominal part. 5. To speak of the skull of this species, the extreme rising at the fore part of the nares on os incisivum is characteristic, while os pterygoides, when viewed from the palate, is complicated. The skull measurement of this species are shown in Table 2. 6. The number of vertebra is shown in Table 3. Of the cervical vertebrae, 1st.-3rd. adhere to all specimens. 7. The number of os costale, two-headed os costale, and cartilago, and their connection to vertebrae and sternum are shown in Table 4 and Fig. 5. 8. The form of sternum is interesting to see. It is a short, wide and single ...