著者

三澤 遼 木村 克也 水町 海斗 服部 努 成松 庸二 鈴木 勇人 森川 英祐 時岡 駿 永尾 次郎 柴田 泰宙 遠藤 広光 田城 文人 甲斐 嘉晃

出版者

一般社団法人 日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

pp.20-023, (Released:2020-10-02)

参考文献数

192

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New distributional records of forty-five fish species off the Pacific coast of Tohoku District, northern Japan are reported, based on specimens trawled by the R/V Wakataka-maru (Japan Fisheries Research and Education Agency) during surveys in autumn of each year from 1995 to 2019. The records include northern distribution range extensions of 19 species, distribution gaps filled for 17 species, and northern and southern limits along the Pacific coast of Japan for eight and one species, respectively. Twenty-seven species were recorded off Tohoku District for the first time. In addition, taxonomic notes for each species, including some meristic and morphometric data from the collected specimens, are also provided.

著者

小幡 光汰 古庄 誠 今村 央 成松 庸二

出版者

一般社団法人 日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

pp.23-018, (Released:2023-08-05)

参考文献数

26

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Five specimens of scaleless dragonfish of the genus Melanostomias (Stomiidae: Melanostomiinae) were collected off the Ogasawara Islands, southern Japan and Fukushima Prefecture, Pacific coast of northern Japan. The specimens conformed to Melanostomias nigroaxialis Parin and Pokhilskaya, 1978 as follows: tips of the upper and lower jaw teeth bifurcated; chin barbel distally expanded from midpoint, the dorsal and ventral expanded areas membranous and transparent, and including small luminous bodies; a single ovoid body without a terminal filament on terminal part of chin barbel; distinct luminous patch on dorsal surface of head absent; and axis of chin barbel almost entirely black, except terminal part. However, the present specimens had a shorter chin barbel than noted in the original description of M. nigroaxialis. Because a plot of barbel lengths (as % of standard length) versus standard length of the present specimens and three specimens examined in the original description indicated that barbel lengths tended to decrease with growth, the difference in barbel length between the two groups of specimens was consistent with intraspecific variation. In addition, the present specimens had different numbers of VAV, AC, IC, VAL and OA photophores compared with the original description of M. nigroaxialis, although the ranges were less than the those in many congeneric species, also indicative of intraspecific variation. Consequently, the present specimens were identified as M. nigroaxialis, previously known only from the Banda Sea, southern Philippines Sea and northern New Zealand. This is the northernmost record of M. nigroaxialis, and first from Japanese waters. The new standard Japanese name “Tomoshibi-kanten-tokagegisu” is proposed for this species.

著者

上田 祐司 成松 庸二 服部 努 伊藤 正木 北川 大二 富川 なす美 松石 隆

出版者

公益社団法人日本水産学会

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.72, no.2, pp.201-209, 2006-03-15

被引用文献数

1 7

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東北海域におけるマダラ資源にVPAを適用して得られた資源量推定値をもとに,トロール調査に基づく面積密度法による資源量推定に必要な漁獲効率を推定した。1歳と2歳の漁獲効率はそれぞれ0.54,0.12と大きな差がみられた。1歳魚については調査範囲が生息域を網羅していることから,漁獲効率はトロール網の前にいた個体の入網率を反映した値であると考えられる。2歳魚以上では,着底トロール調査が困難な岩礁域等にも生息することから,漁獲効率は入網率に加え,網との遭遇率の影響も受けていることが示唆された。