熊野灘陸棚および陸棚斜面で漁獲されたさめ類について

概要

論文の詳細を見る
From the autumn of 1980 to the winter of 1982, the distribution of the sharks was investigated by the bottom set longline and bottom set gill net fishing in Kumano Nada region along the Pacihic coast of Japan. In this area, 739 sharks were caught at depth between 84 m and 867 m, and the living of sharks of 15 genus 20 species was confirmed. Many of the species caught were rare or unrecorded from the area, and as particularly rare spesies from within these shaks, Odontaspis ferox, Pseudotriakis acrages, Scapanorhynchus owstoni and Echinorhinus cookei were remarkable, while Centrophorus tessellatus was particularly common shark, accounting for 47.7 % of the total catch. For the distinctive characters of these sharks, we obtained some obervations as the following.1. a. The total length composition of sharks caugth showed in figure 3. b. The relation between length and weight of sharks caught showed in figure 4. c. As shown in figure 5. the fishing depth range for each shark is different. 2 . The size of the individuals of S. owstoni were as follows : male 269 cm ; females 191 cm, 232 cm and 373 cm TL, and the size of three specimens were as follows : O. ferox female of 175cm ; P. acrages female of 265 cm ; E. cookei female of 242 cm TL. 3. The fishing depth range of four specimes were as follows : O. ferox 250 m to 300 m ; P. acrages 350 m to 400 m ; S. owstoni 270 m to 280 m ; E. cookei 550 m to 650 m.
三重大学水産学部の論文
1982-10-01