Fisheries science
Print ISSN : 0919-9268
Elemental analysis of otoliths of walleye pollock: A trial to discriminate the local stocks around Hokkaido, Japan
RYO KIMURAORIO YAMAMURAYOSHIOKI OOZEKIATSUSHI TSUDA
著者情報
ジャーナル フリー

2003 年 69 巻 6 号 p. 1209-1217

詳細
抄録

We assessed the ability to discriminate local stocks of walleye pollock Theragra chalcogramma based on data from five elements (Na, K, P, Ca and Sr) using electron probe micro analyzer (EPMA) from the otoliths of 26 adult fish (standard length 339-576 mm) caught at four sites (Rausu, Kushiro, Minami-kayabe and Musashi Bank) around Hokkaido, Japan in 1998 and 1999. To compare the elemental compositions, the otolith formation periods were arranged based on the annual rings to allow analysis of comparative winter periods. Elemental concentrations of Na and K remained at a stable level throughout the otolith development. The pattern of Sr concentration differed for each individual. The 1999 winter samples collected from Kushiro and Minami-kayabe distributed similarly and were discriminated at a near-significant level from samples at Rausu. These results indicate that we might be able to discriminate the local Nemuro and Pacific stocks of walleye pollock spawned around Hokkaido using their otolith elements by comparing portions of otoliths formed in the same year.

著者関連情報

この記事は最新の被引用情報を取得できません。

© The Japanese Society of Fisheries Science
前の記事 次の記事
feedback
Top