| 000 -LEADER |
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| fixed length control field |
02570nam a2200289Ia 4500 |
| 001 - CONTROL NUMBER |
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| control field |
78792 |
| 003 - CONTROL NUMBER IDENTIFIER |
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| control field |
per1892 |
| 005 - DATE AND TIME OF LATEST TRANSACTION |
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| control field |
20251010134649.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION |
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| fixed length control field |
190807n r p 0 0eng d |
| 040 ## - CATALOGING SOURCE |
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| Description conventions |
rda |
| 041 ## - LANGUAGE CODE |
|---|
| Language code of text/sound track or separate title |
engtag |
| 050 ## - LIBRARY OF CONGRESS CALL NUMBER |
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| Classification number |
SH1 P538 2016 |
| 082 ## - DEWEY DECIMAL CLASSIFICATION NUMBER |
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| Classification number |
. |
| 100 ## - MAIN ENTRY--PERSONAL NAME |
|---|
| Personal name |
Opinion, April Grace R. and Rana, Joan A., Perelonia, Karl Bryan S., Abendanio, Camille C., and Cambia, Flordeliza D |
| 245 #0 - TITLE STATEMENT |
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| Title |
Spatial and Seasonal Nutrient Trends in Manila Bay Aquaculture Farms |
| 264 ## - PRODUCTION, PUBLICATION, DISTRIBUTION, MANUFACTURE, AND COPYRIGHT NOTICE |
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| Place of production, publication, distribution, manufacture |
. |
| Name of producer, publisher, distributor, manufacturer |
. |
| Date of production, publication, distribution, manufacture, or copyright notice |
. |
| 336 ## - CONTENT TYPE |
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| Content type code |
text |
| Content type term |
text |
| Source |
text |
| 337 ## - MEDIA TYPE |
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| Media type code |
unmediated |
| Media type term |
unmediated |
| Source |
unmediated |
| 338 ## - CARRIER TYPE |
|---|
| Carrier type code |
volume |
| Carrier type term |
volume |
| Source |
volume |
| 505 ## - FORMATTED CONTENTS NOTE |
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| Formatted contents note |
ABSTRACTS: Sampling was done in duplicate during dry (May 2014 and February 2015) and wet season (September 2014 and November 2014) following the blocking scheme for the nutrient trends. As for the nutrient loading, water samples were collected in three ponds after flooding (water intrusion) and prior to draining (water release). Colorimetric analyses by UV-Vis Spectroscopy following the US EPA standard methods were used to determine the samples nutrient levels specially, ammonia, nitrate, nitrite, and phosporous. Results showed that ammonia has the highest levels followed by phosphorous, nitrate, and nitrite. Geographically, higher concentration of nitrogen and phosphorous were observed in EasternBulacan aquaculture farms, which is attributed to the farmers disregard of the important pond preparation activities. Varying seasonal trends were noted among nutrient species due to the different reactions of each analyte under changing climatic conditions. Nutrient levels in sediments were several folds higher than that in the water column. Results of correlation analyses of nutrients in water and sediments showed : a) a good correlation for phosphorous, b) weak correlation for amonia and c) no correlation for nitrites and nitrates, implying that sediments maybe a possible contributor of phosphorous and ammonia in water but not nitrite and nitrate. Ammonia and TKN were significantly higher during the flooding suggesting that water coming in to the pond already contains high levels of said nutrients possibly due to higher organic load. Conversely, nitrite and nitrate levels were significantly higher during the draining suggesting transformation of ammonia into these less toxic substances by nitrifying bacteria. |
| 526 ## - STUDY PROGRAM INFORMATION NOTE |
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| Classification |
Filipiniana |
| 540 ## - TERMS GOVERNING USE AND REPRODUCTION NOTE |
|---|
| Terms governing use and reproduction |
5 |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name entry element |
Aquaculture -- Nitrogen -- Phosphorus -- Manila Bay |
| 655 ## - INDEX TERM--GENRE/FORM |
|---|
| Genre/form data or focus term |
environmental science |
| 700 ## - ADDED ENTRY--PERSONAL NAME |
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| Version |
1 |
| 942 ## - ADDED ENTRY ELEMENTS |
|---|
| Institution code [OBSOLETE] |
lcc |
| Item type |
Serial |
| Source of classification or shelving scheme |
|