On the Propagation of Fish due to Liberating Fry in Four Lakes, Biwako, Kasumigaura, Kitaura and Suwako
スポンサーリンク
概要
- 論文の詳細を見る
This study is based on the yearly records of the catch and the number of liberated fry in the above-mentioned lakes. In each group of fishes, which compete for nearly the same food and living space with each other, the percentage of the total catch of the artificially propagated species in the groups is calculated, and the mean values of the percentage (r and r0 in the periods in which the liberated fry is caught and not respectively) are determined. The mean values of the yearly liberation of the fry of that species (w' in weight, N' in individuals) and the mean values of the yearly catch of that species (w in weight, N in individuals) in the period in which the liberated fry is caught are calculated. The effect of the liberating fry on the propagation is estimated with the following three ratios : r-r0:r0 (The catch of fishes due to the liberation: that due to the natural propagation), r-r0/r w/w' (The recapture ratio of liberated fry in weight) and r-r0/r N/N' (The recapture ratio of liberated fry in individuals).
- 社団法人 日本水産学会の論文
著者
関連論文
- On the Stock of Ommastrephus pacificus APPELLOF
- On the Detection of Fishes by an Ultrasonic wave. I
- On the Yield of Several Kinds of Fishes from the Japan Sea Coasts of Japanese Main Land Hokkaidô
- On the Effect of Artificial Propagation of Salmonidae
- On the Yield of Several Kinds of Fishes from the Pacific Coast of North-eastern Japan
- On the Yield of Sea-breams from the Inland Sea of Japan
- An Estimation of the Diminishing Rate of Stock
- On the Stock of Scomber japonicus (NOUTTUYN)
- Some Knowlegde on the Upstream Migration of Eols
- On the Stock of Gadus macrocephalus TILESIUS
- On the Propagation of Fish due to Liberating Fry in Four Lakes, Biwako, Kasumigaura, Kitaura and Suwako (Further Note)
- Intensity of Skipper Drift-net Fishing
- On the Propagation of Fish due to Liberating Fry in Four Lakes, Biwako, Kasumigaura, Kitaura and Suwako
- On the Flexibility fo Netting Cords