USGS Scientific Investigations Report 2012–5016  - Dispersal of Larval Suckers at the Williamson River Delta, Upper Klamath Lake, Oregon, 2006

Table 2. Spearman correlation coefficients between the density of larval suckers captured at larval catch sites and the simulated density at each site, Upper Klamath and Agency Lakes, Oregon, 2006–09.  

[Behavior indicates that simulated densities were obtained assuming (a) nighttime-only larval drift in the Williamson River channel from Modoc Point Road bridge to the mouth, (b) nighttime-only larval drift upstream of the Williamson River Delta, or (c) nighttime-only larval drift upstream of the Modoc Point Road bridge. Small: fish sized 10–13 mm; Mid, fish sized >13–16 mm; Large, fish sized >16–19 mm. Boldface type indicates that the number of samples (N) was less than 75, and correlation was significant (p<0.05). Boldface italicized type indicates that the number of samples (N) was greater than 75, and correlation was significant (p<0.05). Abbreviations: >, greater than; <, less than; LRS, Lost River sucker; SNS, grouping of shortnose and Klamath largescale suckers; mm, millimeter; /, no larval catch data; –, no simulated data] 

Year	Behavior	Total density	Density			LRS density	SNS density
Year	Behavior	Total density	Small	Mid	Large	LRS density	SNS density
All data combined
2006–09	a	0.19	0.19	0.18	0.00	–	–
2006	a	0.55	0.56	0.57	0.29	–	–
2007	a	0.46	0.52	0.40	0.21	–	–
2008	a	0.27	0.24	0.26	0.15	–	–
2009	a	0.29	0.24	0.29	0.02	0.22	0.26
2009	b	0.32	0.25	0.31	0.05	–	–
2009	c	0.35	0.29	0.33	0.03	–	–
Plankton net data only
2008	a	0.23	0.21	0.14	0.02	–	–
2009	a	0.28	0.25	0.23	/	0.07	0.22
2009	b	0.30	0.26	0.26	/	–	–
2009	c	0.26	0.21	0.22	/	–	–
Larval trawl data only
2006	a	0.39	0.22	0.49	0.28	–	–
2007	a	0.59	0.56	0.53	0.29	–	–
2008	a	0.40	0.36	0.52	0.26	–	–
2009	a	0.53	0.20	0.57	0.35	0.42	0.48
2009	b	0.55	0.23	0.58	0.37	–	–
2009	c	0.56	0.27	0.57	0.34	–	–
Pop net data only
2006	a	0.76	0.88	0.63	0.28	–	–
2007	a	0.22	0.43	0.13	-0.03	–	–
2008	a	0.39	0.33	0.30	0.24	–	–
2009	a	0.05	0.27	0.12	-0.19	0.34	0.20
2009	b	0.08	0.30	0.13	-0.17	–	–
2009	c	0.12	0.40	0.14	-0.25	–	–

Dispersal of Larval Suckers at the Williamson River Delta, Upper Klamath Lake, Oregon, 2006–09

Dispersal of Larval Suckers at the Williamson River Delta, Upper Klamath Lake, Oregon, 2006–09 