Dorset Otter Group - Newsletter 13

DORSET OTTER GROUP WINTER 2002 SURVEY RESULTS
		No. Surveyed	Positive	Negative	% Positive
River Avon	Summer 01	7	1	6	14.2
	Autumn 01	7	3	4	42.9
	Winter 02	6	2	4	33.3
	Total	20	6	14	30
River Axe	Summer 01	5	1	4	20
	Autumn 01	6	4	2	66.7
	Winter 02	3	1	2	33.3
	Total	14	6	8	42.9
River Corfe	Summer 01	3	0	3	0
	Autumn 01	0	0	0	0
	Winter 02	0	0	0	0
	Total	3	0	3	0
River Frome	summer 01	43	8	35	18.6
	Autumn 01	43	9	34	20.1
	Winter 02	10	5	5	50
	Total	136	21	115	15.4
River Piddle	Summer 01	18	3	15	16.7
	Autumn 01	9	3	6	33.3
	Winter 02	10	5	5	50
	Total	37	11	26	29.7
River Sherford	Summer 01	0	0	0	0
	Autumn 01	0	0	0	0
	Winter 02	0	0	0	0
	Total	0	0	0	0
Upper Stour	Summer 01	24	5	19	20.8
	Autumn 01	36	12	24	33.3
	Winter 02	35	8	27	22.9
	Total	95	25	70	26.3
Lower Stour	Summer 01	47	9	38	19.1
	Autumn 01	36	10	26	27.8
	Winter 02	52	14	38	26.9
	Total	135	33	102	24.4
West Dorset Rivers	Summer 01	18	6	12	33.3
	Autumn 01	31	11	20	35.5
	Winter 02	37	14	18	43.5
	Total	81	31	50	38.3
River Wey and the Fleet	Summer 01	2	0	2	0
	Autumn 01	8	0	8	0
	Winter 02	8	0		0
	Total	18	0	18	0
River Yeo	Summer 01	6	6	0	100
	Autumn 01	10	8	2	80
	Winter 02	6	2	4	33.3
	Total	22	16	6	72.7
TOTAL		558	149	409	26.7