Environmental assessment of fishpen culture in Pansipit River (Barangay Poblacion, San Nicolas, Batangas) / by Rowena Andrea Santos
Material type:
TextLanguage: English Publication details: Los Baños, Laguna : University of the Philippines, 1993.Description: xiii, 116 pages : illustrations ; 28 cmContent type: - text
- unmediated
- volume
- 639.3 Sa5 1993
| Item type | Current library | Collection | Call number | Materials specified | URL | Copy number | Status | Notes | Date due | Barcode |
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Theses / Manuscripts
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Ladislao N. Diwa Memorial Library Theses Section | Non-fiction | 639.3 Sa5 1993 (Browse shelf(Opens below)) | Link to resource | copy 1 | Room use only | T-5956 | 00000034 | ||
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Theses / Manuscripts
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Ladislao N. Diwa Memorial Library Theses Section | Non-fiction | 639.3 Sa5 1993 (Browse shelf(Opens below)) | Link to resource | copy 2 | Room use only | T-5977 | 00000035 |
Thesis (Master of Science Environmental Studies) University of the Philippines.
Includes bibliographical references.
VALMONTE-SANTOS, ROWENA ANDREA D. University of the Philippines Los Banos, April 1993. Environmental Assessment of Fish Pen Culture _in_Pansipit River (Barangay Poblacion, San Nicolas, Batangas). Major Adviser: Dr. Macrina T. Zafaralla
The study was undertaken to identify and assess the impacts produced from tilapia culture in Pansipit River (Barangay Poblacion, San Nicolas, Batangas). Three subsystems of the river: physico-chemical, biological and socioeconomic components were considered. Moreover, two phases of the aquaculture technology were taken into consideration: the site selection and construction, and the operation and maintenance. The general procedure of the Environmental Impact Assessment (EIA) was used in the study listing all possible impacts that can be identified. However, only significant impacts were selected and discussed.
Results of the investigation showed possible significant impacts to occur on the biological and socioeconomic subsystems of the river. Ona short-term period, adverse impacts are seen for open fishermen who will not look for other fishing grounds. Disturbance of the benthic habitat is also foreseen. Water quality will also be altered because of the commercial feeds being supplied to the fingerlings. In the long-run, positive impacts will prove beneficial from the operators to the consumers who will be ensured of continuous fish supply. On the water quality level, potential improvement of primary productivity is possible because of the enrichment of the nutrient pool and when bamboo stakes or nets serve as medium for attachments of the phytoplankton. Continuous flushing of the river will ensure that eutrophication of the river is least likely. From here, it is also possible that an improvement on the fishery resources (diversity and population) will take place.
Considering the economic net benefits of the operators, this suggest that tilapia culture in the river, within certain limits, should be continued. However, along with this, monitoring on the number of pens operating should be monitored since present number of these has already congested the river aside from obstructing the navigation.
Recommendations on the monitoring of a) water quality particularly sulfur content to prove that this causes fishkills in the river; b) fishery population - migration from Taal Lake into Balayan Bay and vice-versa to formulate solutions for the improvement of their population; and c) time-series data gathering of the fishery resources (pen and open) to determine maximum sustainable yield of Pansipit River. The above mentioned factors will contribute to a more effective management of the Pansipit River's resources.
Submitted to the University Library 08-04-2020 T-5956 copy 1
Submitted to the University Library 08-04-2020 T-5977 copy 2