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頁籤選單縮合
題名 | 以Delury法推估鮆科魚類期初資源量及漁獲率 |
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作 者 | 陳宗雄; 郭慶老; | 書刊名 | 水產研究 |
卷期 | 2:2 1994.12[民83.12] |
頁次 | 頁15-30 |
分類號 | 439.22 |
關鍵詞 | 期初資源量; 漁獲能力; 漁獲率; Original population size; Catchability; Rate of fishing; |
語文 | 中文(Chinese) |
中文摘要 | 以DeLury方法推估鮆科之期初資源量及漁獲率,須具備下列條件:(1) 沒有外來漁場加入量,(2) 每一小資源群出現及消失時間很短,不超過一星期, 和 (3) 必須強大之漁獲努力量。經利用本法推估?仔雙拖網漁業對1990年枋寮 海域鮆科魚類小資源群之漁獲率發現:(1)未考慮自身成長之增加量時,平均漁 獲率為 0.714,年總漁獲率為0.489。(2) 考慮自身成長之增加量時(以日成長率 為0.783 mm/day,體長 (X) 與體重(Y) 之關係為Y=0.00031X3.741 以及開始評 估之漁獲體長分別為 16 mm、19 mm、23 mm 三組來修正),平均漁獲率分別 為0.850、0.827、0.814,而年漁獲率分別為0.742、0.715、0.691。比較此兩種 結果,經修正之平均漁獲率及年總漁獲率與在同時間、同海域以超音波方法評 估之結果較為接近。 |
英文摘要 | The engraulid resource was estimated by DeLury method which required: 1. there were no immigranted groups from other fishing grounds, 2. the period of occurreance and diminishment of each group was in a short time less than one week, and 3. it was intensivly fished. By this method, the fishing rate in the Fan- Liao area in 1990 was as follows: (1) Without considering the natural increment of all groups during the time of estimation, the average fishing rate was 0.714 and the yearly fishing rate was 0.489. (2) With considering the nature increment (daily growth rate 0.783mm/day, the relationship of body length (X) and body weight (Y) was Y=0.00031X3.741 and body length at the first day of estimation were 16mm,19mm,23mm), the average fishing rates were 0.742, 0.715, 0.691, respectively. In comparison of the two results, the latter that considered the growth of individuals is more closely to the result of the biomass hydrocostic method, which had been applied to same population in the year. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。