爪哇海拖网捕捞的标准化

Mahiswara Mahiswara, M. Natsir, Tri Wahyu Budiarti
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引用次数: 0

摘要

爪哇海小型中上层资源的开采主要由一支环形部族船队主导。环形碎屑是一种有效的捕获工具,在种群研究中,远洋资源通常被作为标准捕获工具。由于车队在环的特性上存在技术差异,因此为了避免偏差,需要进行标准化工作。2006-2008年期间,使用技术特征的主要成分分析方法对爪哇海的渔具捕获工作进行了标准化;船的长度、船的宽度、船上的吨位、发动机功率、灯功率、电网尺寸、手掌容量和ABK量。这三个主要组成部分已经能够解释用于计算每艘船捕鱼能力的总变量的60%以上。主成分分析法避免了对一个特征的依赖,从而可以计算进入环组船队的新环组船只的捕鱼力值。根据分析结果,获得了CPUE=353.4*16.95.Ci和捕鱼力指数(FP)=1+(16.59)*(353.4)-1的捕获函数。爪哇海小型中上层鱼类资源的开发以围网捕鱼为主。围网是一种有效的渔具,这种渔具经常被用作中上层鱼类种群评估的标准渔具。由于围网具有多种技术特征,因此需要进行标准化工作,以避免分析过程中的偏差。2006年至2008年期间,爪哇海围网渔船的捕捞量采用主成分分析方法进行了标准化,该方法包括渔船特性、船长、船宽、船深、总吨位、发动机推进力、光功率、净尺寸、持鱼能力和船员总数。三个新的主要组成部分解释了总方差的60%以上,从而能够计算出每艘船的捕鱼能力。采用主成分分析法避免了对单一特征的依赖,从而可以计算新围网船队的捕鱼力值。根据分析结果,单位努力渔获量的函数公式为CPUE=353.4*16.95.Ci,捕捞力指数(FP)=1+(16.59)*(353.4)-1。Ci。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
STANDARDISASI UPAYAPENANGKAPAN PUKAT CINCIN DI LAUT JAWA
Pemanfaatan sumber daya ikan pelagis kecil di Laut Jawa didominasi oleh armada pukat cincin. Pukat cincin merupakan jenis alat tangkap yang efektif yang dalam kajian stok sumber daya ikan pelagis sering dijadikan sebagai alat tangkap standard. Oleh karena armada pukat cincin memiliki variasi karakteristik teknis, maka untuk menghindari bias perlu dilakukan standardisasi upaya. Standardisasi upaya penangkapan kapal pukat cincin di Laut Jawa periode 2006-2008 dilakukan menggunakan metode analisis komponen utama dari karakteristik teknis; panjang kapal, lebar kapal, dalam kapal, tonase, tenaga penggerak, daya lampu, dimensi jaring, kapasitas palka, dan jumlah ABK. Tiga komponen utama telah dapat menjelaskan lebih dari 60 % total varians yang difungsikan untuk menghitung fishing power masing-masing kapal. Metode analisis komponen utama menghindarkan ketergantungan terhadap satu karakter sehingga memungkinkan untuk melakukan penghitungan nilai fishing power bagi kapal pukat cincin baru yang masuk ke dalam armada pukat cincin. Berdasarkan hasil analisis diperoleh fungsi hasil tangkapan per satuan upaya (CPUE) CPUE = 353.4 * 16.95.Ci dan Fishing Power Indeks (FP) = 1 +(16.59) * (353.4)-1. Ci. Exploitation of small pelagic fish resources in Java Sea was dominated by purse seiners fishery. Purse seine is an effective type of fishing gear, this gear was often used as standard fishing gear for pelagic fish stock assessment. Since purse seiners has a variety of technical characteristics, standardization efforts need to be done to avoid the bias during analysis. Catch effort of purse seiners in Java Sea on the period of 2006-2008 was standardized using principal components analysis method of the boat characteristics, boat length, boat width, boat depth, gross tonnage, engine propulsion, light power, net dimensions, fish hold capacity and total number of crews. Three new major components have explained more than 60% of the total variance which enabled to calculate the fishing power of each boat. Principal components analysis method was used to avoid dependence on a single character to allow the calculation of the value of fishing power for new purse seine fleet. Based on the results obtained by analyzing the function of catch per unit effort formula was CPUE = 353.4 * 16.95.Ci and Fishing Power Index (FP) = 1 + (16.59) * (353.4) -1. Ci.
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