Quarterly Commercial Fisheries Survey 2016 - Philippines

Abstract
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Commercial fisheries is one of the three (3) sectors of fisheries, the others being Municipal fisheries and Aquaculture. The Quarterly Commercial Fisheries Survey is a survey on volume and price of fish unloaded at sample commercial fish landing centers by fishing boats with gross tonnage of more than three (3) tons.

Data on commercial fisheries are collected in fish landing centers where fishermen unload and trade their catch. There are different types of fish landing centers, namely: the traditional, private landing centers and those managed by Philippine Fish Development Authority (PFDA) and Local Government Units (LGUs).

For the traditonal landing center, data are collected through personal interview of at least five (5) key informants knowledgeable on the fishing activites at the sample fish landing center. Key informants may be a fisherman, fishing boat operator, fish trader, fish broker, or barangay officials. Monthly volume and price of fish unloaded at the landing centers are gathered on the last week of the last month of the reference quarter. Statistical Researchers (SRs) are hired to conduct the actual interview of fishermen unloading at the sample landing centers.

Admistrative data from LGUs, privately-managed, and PFDA landing centers are collected by regular staff or SRs during the reference quarter.

The general objective of the survey is to generate information on the quarterly volume and value of fish unloading by species at the provincial, regional and national levels.

Geographic coverage
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National Coverage

Analysis unit
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Entreprises

Universe
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All commercial fish landing centers nationwide

Kind of data
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Sample survey data [ssd]

Sampling procedure
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The list of all commercial fish landing centers in the country serves as the sampling frame for the Quarterly Commercial Fisheries Survey (QCFS) of traditional fish landing centers. Stratified sampling by province was employed with volume of unloading per day as stratification variable. The landing center served as the primary sampling unit. The landing centers were grouped into the following strata:

Stratum 1 - consists of the top producing fish landing centers
Stratum 2 - consists of the major producing fish landing centers
Stratum 3 - consists of all other landing centers

Simple random sampling was used in drawing the sample landing centers from the stratum. Replacement of sample landing center was allowed for landing centers with unstable peace and order situation and for hard or difficult to reach areas. A total of 188 sample landing centers were covered distributed in 58 provinces.

All private, PFDA-managed fish ports and LGU-managed landing centers were completely covered (complete enumeration).

Mode of data collection
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Face-to-face paper [f2f]

Response rate
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Response rate for quarterly commercial fisheries survey is 100%.

摘要
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商业渔业是渔业三大领域之一，其余两项分别为市政渔业和水产养殖。季度商业渔业调查针对的是样本商业渔港中，由载重吨位超过三吨的渔船卸载的鱼类数量和价格进行的一项调查。
商业渔业的数据收集于渔港，渔民在此卸载并交易其捕获物。渔港类型多样，包括传统渔港、私人渔港以及由菲律宾渔业发展局（PFDA）和地方政府单位（LGUs）管理的渔港。
对于传统渔港，数据通过至少五位（5位）对样本渔港捕鱼活动有深入了解的关键信息提供者的个人访谈进行收集。关键信息提供者可能为渔民、渔船操作者、鱼商、鱼经纪或村官。渔港卸载的鱼类月度数量和价格于参考季度最后一个月的最后一周收集。统计研究员（SRs）被雇佣以执行样本渔港卸载渔民的实地访谈。
地方政府单位、私人管理和PFDA渔港的行政数据于参考季度由常规工作人员或SRs收集。
调查的一般目标是在省、市和国家级别生成关于按物种划分的季度卸载鱼类数量和价值的情报。
地理覆盖范围
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全国范围
分析单元
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企业
总体
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全国所有商业渔港
数据类型
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样本调查数据 [ssd]
抽样程序
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国家内所有商业渔港的清单作为传统渔港季度商业渔业调查（QCFS）的抽样框架。采用按省份分层的抽样方法，以每日卸载量为分层变量。渔港作为主要抽样单元。渔港被分为以下层级：
层级1 - 包括最高产渔港
层级2 - 包括主要产渔港
层级3 - 包括所有其他渔港
从层级中抽取样本渔港时采用简单随机抽样。对于治安不稳定或难以到达的地区的渔港，允许替换样本渔港。总共覆盖了188个样本渔港，分布在58个省份。
所有私人、PFDA管理的渔港和LGU管理的渔港均进行全面覆盖（全面普查）。
数据收集方式
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面对面纸质问卷 [f2f]
响应率
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季度商业渔业调查的响应率为100%。