The Quarterly Aquaculture Survey (QAS) is a quarterly survey that generates aquaculture production and area estimates. It has been regularly conducted since 2002.
The Quarterly Aquaculture Survey (QAS) is a quarterly survey that generates aquaculture production and area estimates. It investigates the actual level of production, area harvested and price for each species during the reference quarter of the current and previous year from the sample operators in the top producing municipalities. Fisheries outputs form part of the estimation for the performance of agriculture and eventually, of the National Accounts for the generation of Gross Value Added (GVA), Gross National Product (GNP) and Gross Domestic Product (GDP).
The survey aims to generate accurate and timely information on quarterly production, area and price by aquafarm type and species at the provincial level.
Kind of Data
Sample survey data [ssd]
Unit of Analysis
The scope of the survey include production, area harvested and price by species of each aquafarm type. Data is collected during the current quarter and the same quarter of the previous year.
It covers aquaculture operations in 82 provinces of 17 aquaculture species in 13 aquafarm types/environments. The following are the aquafarm types and environments covered, however, it depends on which is available in the province:
a. Brackish water and fresh water fishpond
b. Brackish water, fresh water and marine pen and cage
c. Oyster, mussel and seaweed
d. Other fresh water aquafarms like rice fish, small farm reservoirs, etc.
Producers and sponsors
Philippine Statistics Authority (PSA)
National Economic and Development Authority (NEDA)
Government of the Philippines
The Quarterly Aquaculture Survey (QAS) is a non-probability survey. Sampling was done by aquafarm type in the province. By aquafarm type, top producing municipalities are those with cumulative share of at least 80% to total area based on Aquaculture Farms Inventory (AqFI).
For each municipality, eight (8) sample aquafarms are selected if the number of aquafarms in the municipality is more than 25. If the number of aquafarms is less than 25, five (5) sample aquafarms are selected. A total of 6662 sample aquafarms were covered nationwide.
Response rate for quarterly aquaculture survey is 73%. This accounted for farms in operation and those without harvest during the reference period.
QAS is a non-probability survey. As such, no weighing procedure is applied.
Dates of Data Collection
Data Collection Mode
Face-to-face paper [f2f]
Initially, the survey returns are manually edited to ensure completeness and accuracy. During this stage, survey returns are checked for completeness from the list of samples. For each of the questionnaires, entries should be complete and numeric entries are in proper unit of measurement and decimal places. After encoding, the entries are then again inspected and reviewed for completeness, accuracy and consistency with other items.
An Aquaculture Data Generation System (AquaDataGen) was developed using MS Excel 2013 for the data processing requirements of QAS. This system is decentralized in the provinces but regional and national summary can also be derived. The AquaDataGen has the facility for data entry, data review and validation.
Chief, Knowledge Management and Communication Division
The PSA and its field personnel shall hold all data supplied by the establishments/households/individuals in confidence. The information obtained from each respondent of the census/survey or individual/establishment in administrative records shall be for statistical purposes only and not for taxation, regulation nor investigation purposes. The data shall be processed with others of the same category and shall be disseminated in summary forms or statistical tables so as not to reveal the identity of any respondent.
Confidentiality of primary data collected from respondents/administrative records systems is guaranteed by Section 26 of the Republic Act No. 10625 (Philippine Statistics Act of 2013). Penalties shall be enforced to acts of breach of confidential information pursuant to Section 27 of the said Act.
Disclaimer and copyrights
The data users/researchers acknowledge that the PSA bears 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.