caa a22 4500 606227849 CHVBK 20210128101200.0 cr unu---uuuuu 210128e20150801xx s 000 0 eng 10.1007/s10641-015-0403-7 doi (NATIONALLICENCE)springer-10.1007/s10641-015-0403-7 Validation of a relationship between statolith size and age of larval Great Lakes sea lamprey ( Petromyzon marinus ) [Elektronische Daten] [Danielle Potts, Heather Dawson, Michael Jones] Sea lampreys (Petromyzon marinus) are parasitic pests in the Great Lakes that have negatively affected game fish populations. Accurate aging of pest species such as sea lampreys can provide estimates of growth and mortality rates, which can direct control efforts. Because growth of larval sea lampreys is both slow and variable, determining age based solely on visual assessments of length-frequency distributions is subject to considerable uncertainty. Otoliths have been used to estimate age in teleosts through annuli counts and otolith size metrics. Lampreys do not have otoliths, having instead an analogous structure called a statolith. Determining age based on statolith annuli counts has been found to be imprecise and inaccurate. Therefore, we evaluated whether statolith size was correlated with ammocoete age using known-age populations of ammocoetes from two Great Lakes streams with contrasting physical conditions that affect larval sea lamprey growth. A morphometric system was used to measure length, width, and height of statoliths from these known-age populations. Statolith width was found to be the measurement that best distinguished the age-classes within the populations. A likelihood-based statistical model was used to assess ammocoete population age composition. Even though statolith width was clearly associated with age, combining statolith width data and length-frequency did not improve estimates of proportions at age relative to those estimated using only length-frequency information. Springer Science+Business Media Dordrecht, 2015 Sea lamprey nationallicence Statolith nationallicence Aging nationallicence Length-frequency analysis nationallicence Potts Danielle Biology Department, University of Michigan-Flint, 303 E. Kearsley St., 48502, Flint, MI, USA aut Dawson Heather Biology Department, University of Michigan-Flint, 303 E. Kearsley St., 48502, Flint, MI, USA aut Jones Michael Quantitative Fisheries Center, Department of Fisheries and Wildlife, Michigan State University, 13 Natural Resources Bldg., 48824, East Lansing, MI, USA aut Environmental Biology of Fishes Springer Netherlands 98/8(2015-08-01), 1859-1869 0378-1909 98:8<1859 2015 98 10641 https://doi.org/10.1007/s10641-015-0403-7 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10641-015-0403-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Potts Danielle Biology Department, University of Michigan-Flint, 303 E. Kearsley St., 48502, Flint, MI, USA aut NATIONALLICENCE 700 1- Dawson Heather Biology Department, University of Michigan-Flint, 303 E. Kearsley St., 48502, Flint, MI, USA aut NATIONALLICENCE 700 1- Jones Michael Quantitative Fisheries Center, Department of Fisheries and Wildlife, Michigan State University, 13 Natural Resources Bldg., 48824, East Lansing, MI, USA aut NATIONALLICENCE 773 0- Environmental Biology of Fishes Springer Netherlands 98/8(2015-08-01), 1859-1869 0378-1909 98:8<1859 2015 98 10641