A fishing method using live bait and its effectiveness for the eradication of largemouth bass, <i>Micropterus salmoides</i>

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  • Katano Osamu
    National Research Institute of Fisheries Science, Fisheries Research Agency
  • Sakano Hiroyuki
    National Research Institute of Fisheries Science, Fisheries Research Agency

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  • 生き魚を餌として用いるオオクチバスの釣り方とその駆除効果
  • イキ ザカナ オ エサ ト シテ モチイル オオクチバス ノ ツリ カタ ト ソノ クジョ コウカ

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A method of fishing using live baitfish was developed as a part of ongoing measures to eradicate the largemouth bass, Micropterus salmoides. An 8-9 m-long rod was used in an open area with a small float, a small-sized hook and a 45cm snell attached to the end of the line. The Japanese dace, Tribolodon hakonensis, 5-9cm in standard length (SL), were used as baitfish. The hook was threaded through the anterior part of the dorsal section of the baitfish and the tip of the hook was extended from the body. Bass were struck and hooked 30-40 seconds after attacking and swallowing the baitfish. Investigations conducted in a pond showed that this fishing method was more effective for capturing bass than lure fishing, and the number of large-sized bass in the pond was effectively reduced using this method. The numbers of largemouth bass caught using three types of bait-live Japanese dace, live shrimps and worms-were also compared in nine ponds and lakes in the Nagano prefecture. Large-sized bass longer than 20cm SL were mostly caught using live Japanese dace, whereas live shrimp were more effective for catching smaller-sized bass than live worms and Japanese dace.

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