APPENDIX I
PHYSICO-CHEMICAL OBSERVATIONS IN SELECTED LAGUNA DE BAY FISHPENS

Station: Los Baños l (Antique Project) no fish mortality in July 1975


Date	Time	Transparency m	Temperature °C		pH		Dissolved Oxygen mg/l		Ammonium NH₄-N/μ/l		Soluble Reactive Phosphate Pc₄-P/μg/l-		Total Alkalinity mg/1 caCO₃		Chlorophyll a Mg/1
1975			*S	*B	S	B	S	B	S	B	S	B	S	B	S	B
17/10	11.00	-	-	-	-		-	-	-		-	-	-	-	27	-
23/10	10.00	1.1	31.8	30.2	7.4		11.7	9.7	29	66	19	35	-	-	*	*
4/11	10.00	0.68	28.5	28.4	-	-	9.2	4.0	44	81	75	55	80	80	44	18
6/11	9.30	0.74	29.5	28.6	-	-	7.5	5.6	74	-	72	-	75	70	45	-
7/11	9.30	0.66	27.5	28.0	-	-	5.5	3.8	100	-	32	-	80	85	57	-
11/11	10.30	-	28.1	27.3	-	-	8.9	5.0	35	36	73	73	93	91	58	46
24 hours monitoring
6/11	9.30	0.74	29.5	28.6	-	-	7.5	5.6	74	-	72	-	75	70	See above
	12.30	0.75	30.0	28.7	-	-	10.6	5.2	98	-	73	-	92.5	30
	15.30	0.63	32.6	29.3	-	-	10.0	3.2	49	-	47	-	67.5	45
	18.30	-	27.8	29.6	-	-	8.6	6.0	41	-	59	-	52.5	37.5
	21.30	-	28.0	27.9	-	-	7.3	4.6	39	-	32	-	27.5	55
7/11	0.30	-	27.0	28.0	-	-	6.9	4.8	52	-	34	-	90	70
	3.30	-	27.0	27.5	-	-	6.5	5.3	130	-	30	-	102.5	110
	6.30	0.64	26.5	27.5	-	-	5.6	5.2	115	-	35	-	70	90
	9.30	0.66	27.5	28.0	-	-	5.5	3.8	100	-	32	-	80	85

Station: Central Bay halfway betweey Navotas and Jala-Jala (PEFTOK Project), fish mortality in July 1975


Date	Time	Transparency m	Temperature °C		pH		Dissolved Oxygen mg/l		Ammonium NH₄-N mg/l		Soluble Reactive Phosphate PC₄-P mg/l		Total Alkalinitymg/l CaCO₃		Chlorophyll a mg/l
1975			S	B	S	B	S	B	S	B	S	B	S	B	S	B
10/11	9.00	0.4	27.9	-	7.9	7.7	10.3	8.9	62	87	120	97	67	65	25	22
12/11	9.30	0.3	29.2	-	8.8	-	-	-	136	-	48	-	67	-	50	-
13/11	9.30	0.35	29.0	-	8.7	-	7.8	-	65	-	50	-	71	-	37	-
24 hours monitoring
12/11	9.30	0.3	29.2	-	8.8	-	-	-	136	-	48	-	67	-
	12.30	0.3	29.0	-	8.7	-	8.4	-	102	-	47	-	67	-
	15.30	0.35	28.2	-	8.6	-	8.3	-	96	-	45	-	72	-
	18.30	-	28.0	-	8.7	-	7.5	-	86	-	52	-	-	-
	21.30	-	28.0	-	8.6	-	7.0	-	55	-	41	-	68	-
13/11	0.30	-	28.0	-	8.6	-	6.5	-	45	-	50	-	69	-
	3.30	-	27.5	-	8.7	-	6.0	-	63	-	52	-	70	-
	6.30	0.3	27.0	-	8.7	-	6.1	-	103	-	57	-	71	-
	9.30	0.35	29.0	-	8.7	-	7.8	-	65	-	50	-	71	-

Station: Los Baños II (ANG Project), no fish mortality in July 1975


Date	Time	Transparency m	Temperature °C		pH		Dissolved Oxygen mg/l		Ammonium NH₄-N mg/l		Soluble Reactive Phosphate PO₄-P mg/l		Total Alkalinity mg/l CaCO₃		Chlorophyll a mg/l
1975			S	B	S	B	S	B	S	B	S	B	S	B	S	B
17/10	10.30	-	-	-	-	-	-	-	-	-	-	-	-	-	23	22
23/10	11.00	1.05	30.6	29.0	7.4	-	10.6	7.8	45	31	27	43	-	-	*	*
4/11	9.00	0.85	28.5	27.7	-	-	9.1	4.0	54	72	67	300	95	87.5	44	18
11/11	10.00	-	28.3	27.6	-	-	8.3	5.5	32	40	100	107	106	98	58	46
Station: Navotas Central Bay (little fish mortality in July 1975) (Yapchiongo Project)
10/11	10.00	0.4	27	-	7.6	7.9	9.3	9.2	80	97	113	98	68	65	*	15
S.B. - Surface/bottom

* - Sample damaged