Quarterly Municipal Fisheries Survey 2015 - Philippines

Abstract
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Municipal fisheries is one of the three (3) sectors of fisheries, the others being Commercial fisheries and Aquaculture. Municipal fisheries cover fishing in marine and inland waters. The Quarterly Municipal Fisheries Survey (Traditional Landing Centers) is a survey on volume and price of fish unloaded at sample municipal fish landing centers by fishing boats with gross tonnage of three (3) tons and less.

Data is collected through personal interview of at least five (5) key informants knowledgeable on the fishing activities 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.

Data on marine municipal fisheries are collected in fish landing centers where fishermen unload and trade their catch. There are two (2) types of municipal fish landing centers, namely: the traditional and those managed by Philippine Fish Development Authority (PFDA) and Local Government Units (LGUs).

The two types of survey conducted in traditional municipal fish landing centers are the monthly or probability survey and the quarterly or non-probability survey.

For monthly surveys, Statistical Researchers (SRs) are hired to do the actual interview of fishermen unloading at the sample fish landing centers. In the absence of adequate funds intended for the payment of wages for SRs, quarterly surveys are conducted by the regular staff in the Provincial Statistics Offices (PSOs).

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 traditional municipal fish landing centers

Kind of data
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Sample survey data [ssd]

Sampling procedure
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The list of all municipal fish landing centers in the country serves as the sampling frame for the Quarterly Municipal Fisheries Survey (QMFS) of traditional fish landing centers. Stratified sampling by province is employed with volume of unloading per day as stratification variable. The landing center serves as the primary sampling unit. The landing centers are 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 is used in drawing the sample landing centers from the stratum. Replacement of sample landing center is allowed for landing centers with unstable peace and order situation and for hard or difficult to reach areas. A total of 840 sample landing centers were covered nationwide.

Sampling deviation
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No deviation from the survey design.

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

Cleaning operations
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Manual editing of questionnaires at the provincial level is needed before the electronic data processing of survey data.

Steps in data editing include the following:
a) Completeness of data items in the questionnaires
b) Correctness of unit of measurement used
c) Coding and encoding
d) Expansion factors used

Before the results are summarized, another series of consistency and completeness check was made during electronic data processing. To facilitate data processing, summarization and generation of output tables for data review, a Fisheries Data Generation System in MS Excel format is prepared. For Municipal fisheries sub-sector, Municipal Data Generation (MunDatagen) system is used to generate provincial and regional municipal fisheries production and value estimates by species. Data collected in QMFS Form 1 are encoded in landing center worksheets of MunDatagen. These landing center worksheets serve as inputs to Provincial Data Generation Worksheet. The provincial worksheets are finally compiled and summarized at the regional worksheets.

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

Data appraisal
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Since quarterly survey of municipal fish catch was done through interviews of key informants, validation of responses is needed. Additional information was gathered from interviews of people from government and non-government agencies and offices and other stakeholders in fisheries. Use of auxiliary information was also one way of validating data generated by the survey. Examples of these were the programs for the improvement of catch of fishermen by the Bureau of Fisheries and Aquatic Resources, record of weather disturbances and provinces affected, existing fishery laws, report or study on status of fishing grounds, etc. Comparing current estimates with the time series data was also one way of appraising survey results.

摘要
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市政渔业是渔业三大部门之一，其余两者为商业渔业和水产养殖业。市政渔业涵盖海洋和内陆水域的捕鱼活动。季度市政渔业调查（传统渔港）是一项针对样本市政渔港中，由总吨位不超过三吨的渔船卸载的鱼类数量和价格的调查。数据通过至少五位对样本渔港捕鱼活动有深入了解的关键信息人员的个人访谈收集而来。关键信息人员可能包括渔民、渔船经营者、鱼商、鱼经纪人或地方政府官员。在参考季度的最后一个月的最后一周收集卸载至渔港的鱼类的月度数量和价格。有关海洋市政渔业的数据在渔民卸载和交易其捕获物的渔港收集。市政渔港分为两种类型：传统渔港和由菲律宾渔业发展署（PFDA）和地方政府机构（LGUs）管理的渔港。在传统市政渔港进行的两种调查类型为月度或概率调查以及季度或非概率调查。对于月度调查，聘请统计研究员（SRs）在样本渔港对卸载的渔民进行实际访谈。在资金不足以支付统计研究员工资的情况下，季度调查由省级统计局（PSOs）的常驻人员执行。调查的一般目标是生成关于省级、区域和国家层面鱼类卸载量及价值的季度信息和价值信息。
地理覆盖范围
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全国覆盖
分析单元
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企业
总体
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所有传统市政渔港
数据类型
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样本调查数据[ssd]
抽样程序
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全国所有市政渔港的名单作为传统渔港季度市政渔业调查（QMFS）的抽样框架。采用按省份划分的分层抽样，以每日卸载量为分层变量。渔港作为主要抽样单位。渔港被分为以下层级：
层级1 - 由产量最高的渔港组成
层级2 - 由主要产量的渔港组成
层级3 - 由所有其他渔港组成
从每个层级中抽取样本渔港采用简单随机抽样。对于治安状况不稳定和难以到达的地区，允许替换样本渔港。全国共计覆盖840个样本渔港。
抽样偏差
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没有偏离调查设计。
数据收集方式
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面对面纸质问卷[f2f]
清洗操作
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在电子数据处理调查数据之前，需要在省级层面手动编辑问卷。数据编辑步骤包括以下内容：
a) 问卷中数据项的完整性
b) 所用测量单位的正确性
c) 编码和编码
d) 扩展因子
在结果总结之前，在电子数据处理过程中进行了一系列的一致性和完整性检查。为了便于数据处理、总结和生成数据审查的输出表格，准备了MS Excel格式的渔业数据生成系统。对于市政渔业子部门，使用市政数据生成（MunDatagen）系统通过物种生成省级和区域市政渔业生产和价值估计。QMFS表1中收集的数据在MunDatagen的渔港工作表中编码。这些渔港工作表作为省级数据生成工作表的输入。省级工作表最终被编译和总结为区域工作表。
响应率
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季度市政渔业调查的响应率为100%。
数据评估
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由于市政渔业捕捞的季度调查是通过关键信息人员的访谈进行的，因此需要对响应进行验证。还通过政府和非政府机构、办公室和其他渔业利益相关者的访谈收集了额外信息。使用辅助信息也是验证调查生成数据的另一种方式。例如，渔业和水产资源局改善渔民捕捞量的计划、天气干扰记录和受影响的省份、现行的渔业法律、关于渔场状况的报告或研究等。将当前估计与时间序列数据进行比较也是评估调查结果的一种方式。