Efficiency of a macroroughness block ramp in reducing the impact of low-head dams on riverine fish dispersion | Knowledge and Management of Aquatic Ecosystems

Biological conservation, ecosystems restoration and ecological engineering

Open Access

Table 1

Species, number and total length of tagged fish, migration rate (%) and total length of migrating individuals, along with efficiency estimates of the macroroughness ramp computed for the whole survey period and when accounting for different fish attempts (na: no tagged individuals in the sector).

		Tagged fish			Fish detected in migration					During the whole study duration			Accounting for fish attemps

			Total length (mm)		Proportion (%)			Total length (mm)
Species		Total number	mean	min - max	Total	S1-S2-S3	S4-S5-S6	mean	min - max	Attraction A_eff(%)	Passage P_eff (%)	Overall Efficiency overall P_eff (%)	Attraction A_eff (%)	Passage P_eff (%)	Overall Efficiency overall P_eff (%)
Bleak	Alburnus albumus (Linnaeus, 1758)	17	112	95 – 135	0	0	0	–	–	–	–	–	–	–	–
Barbel	Barbus barbus (Linnaeus, 1758)	60	189	102 – 407	55	57	54	202	107–407	72.7	91.7	66.7	55.2	79.1	45.2
Bitterling	Rhodeus sericeus (Pallas, 1776)	9	77	70 – 81	11	17	0	70	70–70	100	100	100	50	100	50
Chub	Squalius cephalus (Linnaeus, 1758)	344	172	101 – 469	32	41	21	170	102–323	66.7	89.2	59.5	53.9	86.7	46.5
Roach	Rutilus rutilus (Linnaeus, 1758)	47	151	102 – 200	6	50	4	159	132–180	66.7	100	66.7	66.7	100	66.7
Gudgeon	Gobio gobio (Linnaeus, 1758)	288	111	97 – 145	19	24	12	112	100–145	51.9	75	38.9	42.4	71.4	32.8
Common nase	Chondrostoma nasus (Linnaeus, 1758)	8	420	276 – 495	13	na	13	451	451–451	100	100	100	100	100	100
European perch	Perca fluviatilis (Linnaeus, 1758)	12	176	120 – 290	8	0	10	130	130–130	100	100	100	100	100	100
Pumpkinseed	Lepomis gibbosus (Linnaeus, 1758)	3	108	107 – 110	67	na	67	109	107–110	100	100	100	100	100	100
Rudd	Scardinius erythrophthalmus (Linnaeus, 1758)	1	140	140 – 140	0	na	0	–	–	–	–	–	–	–	–
Spirlin	Alburnoides bipunctatus (Bloch, 1782)	149	94	80 – 115	24	33	4	93	80–115	69.4	52	36.1	55.7	43.7	24.2
Brown trout	Salmo trutta (Linnaeus, 1758)	4	274	190 – 390	75	67	100	264	190 – 390	100	100	100	100	100	100
Common dace	Leuciscus leuciscus (Linnaeus, 1758)	21	148	100 – 249	33	57	21	130	109–169	57.1	75	42.9	40.5	75	33.3
Total		963	142	70 – 495	26	34	17	151	70–451	65.5	81.8	53.6	52.9	77	41.6

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.