Thiamine status of rainbow smelt (Osmerus mordax) eggs in the Great Lakes, USA

Figures & data

Figure 1. Sites encompassing the Great Lakes and two additional waters (Little Clear Pond (LCP) and Fore River (FR)), where gravid rainbow smelt were captured and their eggs collected for thiamine analysis.

Table 1. Mean concentrations (nmol/g) of total thiamine (± SE) in the eggs of rainbow smelt from the Great Lakes, USA and two comparison groups (Little Clear Pond and Fore River). Numbers in parentheses (N/n): N is the number of samples analyzed; n the number of individual females whose eggs are represented in each sample. Length is the mean total length (mm) of all fish sampled. Values not followed by a common superscript significantly differ (p < 0.05).

Lake (N/n)	Length	2006	2007	2008	2009
Lake Ontario	141 ± 3.7^A	1.4 ± 0.2^ab(10/1)	15.6 ± 3^c(10/1)	11.3 ± 2.6^cde(2/16)	1.1 ± 0.2^b(3/8)
Lake Erie	143 ± 2.3^A	–	–	3.3 ± 0.5^abe(6/20)	2.6 ± 0.1^abe(3/10)
Lake Michigan	122 ± 0.3^B	–	3.9 ± 0.7^abe(5/1)	–	–
Lake Huron	133 ± 3.1^A	–	–	–	9.9 ± 0.8^acde(3/10)
Lake Superior	128 ± 4.2^B	–	5.0 ± 0.8^abde(7/2)	–	9.9 ± 2.8^acde(3/9)
Little Clear Pond	141 ± 4.3^A	–	–	8.1 ± 2.3^abcde(3/20)	–
Fore River	189 ± 12.3^C	–	–	13.3 ± 4.4^cd(5/1)	10.9 ± 1.1^cde(5/1)