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題 名 | The Estimation of Age Composition of Lizard Fish (Saurida undosquamis) Caught from the Southern Taiwan Strait Using Iterated Age-length Key Algorithm=利用年齡--體長檢索反覆運算法估計臺灣海峽南部產正蜥魚之年齡組成 |
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作 者 | 李英周; | 書刊名 | 臺灣水產學會刊 |
卷 期 | 22:1 1995.03[民84.03] |
頁 次 | 頁41-51 |
分類號 | 439.2 |
關鍵詞 | 年齡組成; 年齡--體長檢索反覆運算法; 臺灣海峽; 正蜥魚; Age composition; Iterated age-length key algorithm; Taiwan strait; Saurida undosquamis; |
語 文 | 英文(English) |
中文摘要 | 本研究判讀台灣海峽南部產正蜥魚的脊椎骨輪紋數以建立1992年與1993年之年齡一體長轉換檢索表,再利用年一體長檢索反覆運算法(IALK)分析1992年與1993年的全年聯合體長頻度以估計該魚種之年齡組成。結果顯示在高R2值之下,1992年有十個年齡群(0∼9歲),其主要漁獲年歲為2歲;而1993年有九個年齡群(0∼8歲),其主要漁獲年則出現在3歲。 |
英文摘要 | The demersal lizard fish widely distribute from the sub-tropical area to the tropical area. They include four major species in the Southern Taiwan Strait, i.e., Saurida undosquamis, S. tumbil, S. elongata, and S. gracilis. Among them, the S. undosquamis occupies 67.15% of the lizard catch in gross weight. The specimens used in this study were sample monthly from the landings of the baby trawlers that operated in the Southern Taiwan Strait from May 1992 to December 1993 at Kaohsiung Gusan Fish Market. The vertebra age character was adopted to be ring-read. The age compositions in 1992 and 1993 were estimated from the joint length frequency data and the observed age-length key tables using the iterative age-length key algorithm (IALK). The results are as follows: There had 10 age groups from age 0 to age 9 in 1992 and 9 age groups from age 0 to age 8 in 1993. The major catch group appeared at age 2 in 1992 and age 3 in 1993. The high R2 values indicate that the results might be credible, and that the IALK could be a reliable method. |
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