Fish Species Richness in Lowland Streams with a Geothermal Input Phenomenon, Sarapiquí de Heredia, Costa Rica

Table 2

Species abundance at 4 sites in low-order streams at La Selva Biological Station, Heredia, Costa Rica.

Species		Abundance
	Sábalo	Salto	Surá	Jaguar
Alfaro cultratus	5	3	2	3
Archocentrus nigrofasciatus	2	0	2	0
Asthateros alfari	2	1	1	0
Astyanax aeneus	37	28	43	19
Atherinella hubbsi	0	0	1	0
Bramocharax bransfordii	6	0	0	0
Brycon guatemalensis	17	29	26	25
Bryconamericus scleroparius	6	0	0	22
Cryptoheros septemfasciatus	0	3	2	2
Hypsophrys nicaraguensis	3	0	0	0
Neetroplus nematopus	15	10	25	0
Poecilia gilli	4	0	0	2
Priapichthys annectens	0	1	0	0
Tomocichla tuba	3	3	2	0
Total number of individuals (N)	100	77	104	73
Total number of species (S)	11	8	9	6
Estimated species richness (mean)	9.8	13.4	14.8	15.5
Lower 95% C.I.	9.4	12.5	14	15.1
Upper 95% C.I.	14.3	23.6	22.2	23.3