• 作者： 林曜松
• 作者服務機構： 國立臺灣大學動物學系
• 中文摘要： 本文係以迥歸分析探討桃園蓄水池18年來影響淡水魚生產量的因素，期達到頂測生產之目的。結果顯示：(1)蓄水池單位面積的生產與魚池面積之大小成反比，二者間之相關係數為一0.837。(2) 1965年以前，桃園蓄水池之每公頃產量為500 kg，由於過磷酸肥料之使用，使魚產 1966-1971年之問增為每公頃 880 kg。(3) 魚池之生產量與放養量成正相關(r一0.858)。近年來，魚產量再增至1100 kg即與 放養量之增加密切相關。(4）各種魚之平均生存率為55.1%，在目前的放養量下，生存率與放養量間之關係不顯 著。(5)在1965-1967年施肥期問，各池之生產量可由其施放之肥料量及該魚池往年之平均 生產量預側之。
• 英文摘要： To determine whether certain factors may affect fish yield. Analysis,particularly regression analysis, was made on the fish yield data from 1958to 1975 in Taoyuan reservoirs. The findings were as follows: (1）Fish production per hectare was inversely proportional to size of reservoir. The simple correlation between these two variables was -0.837. (2) With the application of superphosphate, fish production increased from a mean of 500 kg per hectare before 1965 to an average of 880 kg per hectare in 1966-1971． (3) A positive correlation existed between fish yield per hectare and stocking rate (r一0.858)．With increase in stocking rate, fish produc- tion increased to over 1100 kg per hectare in recent years. （4夕:mean survival rate of fish was 55.1%．The correlation（r=-0.437) observed between survival rate and stocking rate in Taoyuan re- servoirs was not significant. (5) Fish production during the experimental fertilization periods in 1965, 1966 and 1967 could be predicted from the amount of fertilizers ap- plied and the mean yield of the pre-experimental years.
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