サバ釣機構に関する研究
スポンサーリンク
概要
- 論文の詳細を見る
The fishing experiments for mackerel were carried out with rod and line in a fish-preserve of 3 meters cube. Number of fish caught and number of bites per minute were recorded during each angling experiment. There were two types in the angling curve, decreasing type and ceiling type. When the abilities of anglers maintained a superior postion against the the feeding activity of fish, the angling curve showed the decreasing type. In the ceiling type, the maximum number of fish caught showed the abilities of anglers. We call the ratio of number of fish caught to number of bites the angling rate in early 3 angling experiments was about 0.6 in either case and was affected with the abilities of anglers. In the 4th experiment the angling rate was 0.44, because the abilities of anglers were weak. It is considered that the process of angling is composed of two periods. 1st period is from the moment when a bait is put into water to the moment when a fish catches the bait, and 2nd period is from the moment when the fish catches the bait to the moment when a new bait is put into water again. The former is called the time for fish to catch hook with bait, the latter is called the time required to fish up. The time for fish to catch hook with bait in angling experiments became longer than the time for fish to catch food given reported in the previous paper, 1) because the fish was afraid of bait with a hook and a line. Though the time for fish to catch hook with bait was affected primarily with the physiological and psychological conditions of fish, it was affected secondarily with the abilities of angler. while the time required to fish up was affected only with the abilities of angler. In early 3 experi-ments, the mean time required to fish up was 17 seconds and in the 4th experiment it was 35 seconds. In shoal composed of 23 fish the time for fish to catch hook with bait was longer than that in shoals composed of 90 or more fish. The movement of fish to food in small shoal was different from that in large school.
- 公益社団法人 日本水産学会の論文
著者
関連論文
- コイ鰓弁切除の呼吸に及ぼす影響
- 水質汚濁斃死魚の死因判定法について-VIII : Phenolによる急性中毒死
- サバ釣機構に関する研究
- 網膜移動反応利用による斃死魚の死亡時間帯の推定
- サンマの漁場と海況
- 水質汚濁斃死魚の死因判定法について-VII : ニッケルによる斃死
- 水質汚濁斃死魚の死因判定について-III : 魚体中のPCP確認法
- 水質汚濁斃死魚の死因判定法について-13-カドミウムについて-1-
- マサバの摂餌行動について
- メバルの胃内容物量と摂餌量との関係
- マサバの胃内容量と胃粘膜皺との関係
- マサバにおける胃内容物量と摂餌量との関係
- 魚の飽食量測定に関する一実験〔英文〕
- 水質汚濁斃死魚の死因判定法について-5-銅による斃死
- 水質汚濁斃死魚の死因判定について-4-シアンによる斃死
- 水質汚濁斃死魚の死因判定法について-4-Crによる斃死
- 水質汚濁斃死魚の死因判定法について-12-水銀による急性中毒死-1-
- 淡水魚類の細菌性疾病 (魚類の細菌性疾病に関するシンポジウム(昭和42年度日本水産学会秋季大会シンポジウム))
- 魚類の成長構造解析に関する研究-1-コイの最大成長
- 釣獲曲線について (カツオ一本釣機構に関する研究-1,2-)
- 餌交換時間について (カツオ一本釣機構に関する研究-1,2-)
- スズメッキ液による斃死 (水質汚濁斃死魚の死因判定法について-10,11-)
- Nocardial infection in cultured yellowtails (Seriola quinqueradiata and S.purpurascens)—II:Histological study
- Nocardial infection in cultured yellowtails (Seriola quinqueruiata and S. purpurascens)—I:Bacteriological study
- 鉛による急性中毒死 (水質汚濁斃死魚の死因判定法について-10,11-)
- Studies on the aquatic acid-fast bacteria—I:Distribution and grouping.
- Studies on the post-mortem identification of the pollutant in fish killed by water pollution—IX.:Confirmation method of CO in the fish