Assessing the migratory histories, trophic positions, and conditions of lake sturgeon in the St. Croix and Mississippi Rivers using fin ray microchemistry, stable isotopes, and fatty acid profiles

Ecological Processes

Table 1 Capture and morphometric data for lake sturgeon from the St. Croix and Mississippi Rivers

Fish ID	MN-DNR Pit tag	River	Location^a	Capture date	Age (years)	Total Length (mm)	Weight (kg)	Muscle sample^c
94433	900118001527746	St. Croix	KN	9/15/2014	24	1352	13.25	Y
40115	900118001582597	St. Croix	KN	9/15/2014	11	1123	5.9	Y
94434	900118001548859	St. Croix	KN	9/15/2014	23	1307	12.45	Y
94435	900118001583442	St. Croix	PC	9/15/2014	10	882	3.5	Y
94440	900118001580878	St. Croix	PC	9/16/2014	22	1384	8.9	Y
94439	900118001582948	St. Croix	PC	9/16/2014	10	964	3.8	Y
94436	900118001529433	St. Croix	KN	9/16/2014	10	975	4.41	Y
94438	900118001529426	St. Croix	KN	9/16/2014	12	1031	5.1	Y
94437	900118001579692	St. Croix	KN	9/16/2014	15	1204	9.94	Y
94441	900118001581884	St. Croix	XL	9/17/2014	8	690	1.15	Y
94442	900118001527112	St. Croix	XL	9/17/2014	8	787	2.15	Y
94443	900118001527559	St. Croix	XL	9/17/2014	16	1160	8.9	Y
94444	900118001527313	St. Croix	XL	9/17/2014	4	418	0.24	Y
94445	900118001583431	St. Croix	XL	9/17/2014	7	558	1.05	N
94446	900118001583375	St. Croix	XL	9/17/2014	7	676	1.35	N
P3-01^d		Mississippi	D2	10/20/2014	14	1150		Y
P3-02^bd		Mississippi	D2	10/21/2014	11	1260		Y
P3-03^bd		Mississippi	D2	10/21/2014	16	1370		Y
P3-04^bd		Mississippi	D2	10/21/2014	24	1250		Y
P3-05^bd		Mississippi	D2	10/21/2014	14	1020		Y
P3-06^bd		Mississippi	D2	10/23/2014	13	1150		Y

^aSample location codes: KN Kinnickinnic narrows; PC Prescott, Wisconsin; XL Xcel Energy, King Plant outfall near Stillwater, Minnesota; D2 Lock and Dam 2 tailwaters in Navigation Pool 3 near Hastings, Minnesota
^bFish length measurements were to the nearest cm
^cAnterior dorsal muscle tissue sampled (Y = yes or N = no) and analyzed for total lipids, fatty acids, and stable isotopes
^dLake sturgeon Fish IDs P3-01 through P3-06 are equivalent to Fish IDs UMR01-06 in Additional file 1 and Fig. 10a, c