Data series on quarterly volume and value of municipal fish production by province, by species is maintained by the Fisheries Statistics Division (FSD) of the Bureau of Agricultural Statistics (BAS) since 2002. Although the survey is done monthly, estimates of municipal fish production are released on a quarterly basis. Prior to 2002, only annual data on volume and value of municipal fish production by species, by province and by region were retained by the FSD. These data were published in the yearly publication entitled Fisheries Statistics of the Philippines.
Data collection for fisheries was originally under the mandate of the Bureau of Fisheries and Aquatic Resources (BFAR) until the creation of the BAS in 1987. Data collection was temporarily suspended mainly due to administrative reasons. Alternative methods of estimation were used to produce municipal fisheries data in the absence of surveys. Estimation of fish production was done at the national level with some indicators coming from operations centers. Regional and provincial outputs were distributed with 1985 as the baseline data.
Improvements in the survey design were implemented over the years. Samples from both major and minor landing centers were selected from the frame. Contractual Data Collectors (CDCs) were hired to gather all necessary information from unloading municipal fishing boats.
One concern of the BAS is how to sustain the continuity of monthly surveys due to high cost of survey operations. Monthly surveys are highly dependent on financial support extended by the BFAR, the donor agency. As a result, the number of sample fish landing centers and the number of months to be covered for the year change from year to year. Because of this, monthly collection of fisheries data is disrupted and becomes an on and off activity. The huge amount of money involved in the conduct of nationwide survey of municipal fish landing centers hindered the desire of BAS to produce the necessary information wanted by stakeholders. In the absence of monthly surveys, the BAS opted to do non-probability or quarterly surveys wherein key informants are the sources of information through recall on volume of fish unloaded in sample landing centers.
Monthly Municipal Fisheries Survey in traditional fish landing centers generates monthly volume and value of fish production by species, fishing ground and fishing gear by province. The limited financial resources needed to cover the whole fishing ground for the whole year compelled BAS to confine the statistics produced for fisheries to the volume and value of production by province.
Information on fishing effort is also generated by this survey. However, this is still under study before BAS could finally publish and release data on fishing effort.
The Monthly Municipal Fisheries Survey is a statistical inquiry on municipal fishing that is conducted on an every-other-day frequency. Contractual Data Collectors (CDCs) are hired to conduct the survey of fishing boats unloading at the sample fish landing center. Data are gathered through actual interviews of respondents during peak unloading time using a structured questionnaire prepared at the Central Office of the BAS. The target respondents are the fisherman, fishing boat operators, and any knowledgeable crew of the fishing boat.
The general objective of the activity is to generate information on the monthly volume of fish catch by fishing ground, by fishing gear and by species at the provincial, regional and national levels. Collection of municipal fisheries data is a probability survey done in places called fish landing centers where fishing boats of three (3) gross tons and less unload and trade their catch. There are two (2) types of municipal fish landing centers, the traditional and those managed by the Philippine Fisheries Development Authority (PFDA) and local government units (LGUs).
Monthly Municipal Fisheries Survey differs from quarterly survey in terms of number of variables gathered during the survey. Major objective of both surveys is to generate volume and value of fish catch by species by province.
Kind of Data
Sample survey data [ssd]
Unit of Analysis
The Monthly Commercial Fisheries Survey has the following scope as presented in the questionnaire:
1. General information: region, province, date of data collection (month, day, year).
2. Landing center: complete name, stratum classification, unloading time.
3. Boat information: boat number; name of fishing boat; type of boat; if carrier, name of catcher boat/s served; tonnage class; type of fishing gear used.
4. Fishing effort: number of crew, number of days for searching fish, total number of hauls (for net gears only).
5. Fishing unloading information: name of fishing ground, species and code, quantity in local unit, name of local unit, weight of one local unit, price per local unit, raising factor, total unloadings
6. Summary of unloadings for the day by gear type.
All municipal fishing boats unloading in traditional fish landing centers.
Producers and sponsors
Bureau of Agricultural Statistics (BAS)
Department of Agriculture (DA)
Bureau of Fisheries and Aquatic Resources
The list of traditional municipal fish landing centers by province is the sampling frame used for the monthly survey of municipal fisheries. This survey utilizes a stratified random sampling with the province as the domain. The average volume of unloading per day is the variable used in the stratification of the fish landing centers into three (3) strata, namely:
1. Stratum 1 - consists of the top producing or major fish landing centers
2. Stratum 2 - consists of the minor producing fish landing centers
3. Stratum 3 - consists of all other fish landing centers
The landing center serves as the primary sampling unit while the fishing boat serves as secondary sampling unit. Simple random sampling is used in drawing the sample landing centers from the stratum. The number of sample fish landing centers varies by province depending on the resources available for payment of wages of CDCs.
For 2009, funds allocated for the conduct of this activity allowed to cover samples of 40 provinces only for three (3) months survey: April, May and June. Total number of sample landing centers was 294. Breakdown of number of samples by stratum was as follows:
1. Stratum 1 - 155 samples out of total 220
2. Stratum 2 - 88 samples out of total 1584
3. Stratum 3 - 51 samples out of total 4667
For the remaining months of the year, quarterly surveys were carried out in those sampled provinces. Quarterly surveys in non-sample provinces were conducted throughout the year.
CDCs are instructed to do simple random sampling of boats unloading at the fish landing center. CDCs are reminded to have samples of every type of fishing gear used by the fishermen during the survey date and to have as many samples as he/she can. But if the number of unloading boats is 15 or less, a complete enumeration of boats shall be done.
Response rate for monthly municipal fisheries survey is 100%.
A raising factor derived from the total number of municipal fish landing centers over the number of samples by stratum is used to expand results of monthly surveys. This expansion factor varies from one province to another.
Dates of Data Collection
Data Collection Mode
Face-to-face paper [f2f]
Data editing and data review processes start at the POCs. Inputs for the review include the survey returns, the summary sheets, the list of samples and expansion factors used. Prior to encoding, manual editing of accomplished questionnaires is done for completeness and consistency of entries. Codes used for species, gears and fishing grounds are validated. Correctness of units of measurement used for volume and price are checked.
Total number of boats and number of sample boats and correspondingly the number of landing centers and number of collection days are likewise checked as these are used in the estimation.
The first thing to check is the completeness of the questionnaires as to the number of samples. Missing data and unacceptable responses are reviewed. Correctness of units of measurement used for volume and price are also checked. Out of range prices are verified. Manual editing is done not only for completeness of desired information like volume and price by species but also for consistency of entries. Codes used for species, gears and fishing grounds are likewise checked.
After all the data from the questionnaires are reviewed, verified, cleaned and checked, these are encoded using the Municipal Fisheries Survey data processing worksheet of MMFS.XLS. Monthly output tables generated from the electronic data processing are inputted to a Municipal Data Generation System. This system facilitates data processing, summarization and generation of provincial and regional volume and value of municipal fish production by species.
Provincial and regional estimates of production are further validated through the use of auxiliary information and conduct of interviews of knowledgeable people in the fishing industry. Impact of different programs and policies implemented by the BFAR on performance of catch of fishermen is also considered. Use of time series data by province and by species for catch comparison is also one way of appraising survey results. Computed change in production is reviewed for acceptability.
The Bureau of Agricultural Statistics (BAS) strictly observes the confidentiality of data. As stated in the BAS' survey questionnaires and the forms relevant to the conduct of any statistical inquiry, data provided by the respondents shall be used solely for statistical purposes.
The datasets of this study are categorized under licensed files. Access to licensed datasets is through request and is only granted to Data Users/Researchers with a legally registered sponsoring agency (university, company, research centre, national or international organization, etc.).
The Data Users/Researchers must agree to comply with the following:
1. Fill up a Data Access Agreement that will be provided.
2. Copies of the restricted data or any data created on the basis of the original data will not be copied or made available to anyone other than those mentioned in this Data Access Agreement, unless formally authorized by the BAS.
3. The data will only be processed for the stated statistical purpose in the agreement and not for investigation of specific individuals or organizations. Data will not in any way be used for any administrative, proprietary or law enforcement purposes.
4. The dataset must not be made to match with other datasets.
5. The Data Users/Researchers shall not attempt to identify any individual person, family, business, enterprise or organization. If such a unique disclosure is made inadvertently, no use will be made as to the identity of any person or establishment discovered. The identification will not be revealed to any other person not included in the Data Access Agreement.
6. The Data Users/Researchers must observe security measures to prevent unauthorized access to licensed microdata acquired from the BAS. The microdata must be destroyed upon the completion of their research. Destruction of the microdata will be confirmed in writing by the Data Users/Researchers to the BAS.
7. Any books, articles, conference papers, theses, dissertations, reports, or other publications that employ data obtained from the BAS/BAS Electronic Archiving and Network Services (BEANS) will cite the source of data in accordance with the citation requirement provided with the dataset.
8. If there are any changes or additional requirements in the orginal request, the Data User/Researcher must apply for another request.
9. Breaches of the Data Access Agreement will be taken seriously and the BAS will take action against those responsible for the lapses if wilful or accidental. Failure to comply with the directions of the BAS will be deemed to be a major breach of the agreement and may involve recourse to legal proceedings. The BAS will maintain and share with partner data archives a record of those individuals and organizations which are responsible for breaching the terms of the Data Access Agreement and will impose sanctions on release of future data to these parties.
As specified in the agreement under access conditions, users are required to cite the source of data in accordance with the citation requirement provided with the dataset. The citation requirement for this study is as follows:
"Bureau of Agricultural Statistics, Monthly Municipal Fisheries Survey, 2009, Version 1 of the licensed dataset May 2010, provided by the BAS Electronic Archiving and Network Services. http://beans.bas.gov.ph"
Disclaimer and copyrights
The data users/researchers acknowledge that the BAS and the agency funding the study bear no liabilities and responsibilities for any particular, indirect, or consequential damages or any damages, whatsoever resulting from loss of use, or of data in connection with the use or for interpretations or inferences based upon such uses.