Journal
JOURNAL OF GREAT LAKES RESEARCH
Volume 47, Issue -, Pages S570-S579Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jglr.2020.06.002
Keywords
Sea lamprey; Aging; Growth estimation; Growing degree days
Funding
- UM-Flint Office of Research and Sponsored Programs
- UM-Flint Graduate Programs Office
Ask authors/readers for more resources
Recent advances in age and growth estimation of invasive sea lamprey in the Great Lakes have led to the development of a more accurate growth estimation method, utilizing a new linear model with stream and lake as contributing variables. The model predicts that larval sea lamprey grow faster in warm streams with low densities of lamprey larvae, providing important insights for sea lamprey control management strategies.
We review recent advances in age and growth estimation of invasive sea lamprey (Petromyzon marinus) in the Great Lakes and present a more accurate method for growth estimation. To forecast growth and prioritize streams for control actions, sea lamprey managers currently use an average daily growth model. Here, a new linear model that included stream and lake as contributing variables was investigated and found to outperform the currently used growth model (roughly a 10 mm difference at age 1). Length-at-age of larvae between ages 1 and 4 were also best forecasted by a linear model with the predictor variables including growing degree days, stream, lake, and larval lamprey density. The model predicts that larval sea lamprey grow faster in warm streams with low densities of lamprey larvae. More accurate growth models could allow sea lamprey control managers to improve decisions concerning how sea lamprey control effort is allocated among streams, and could help inform broader modeling efforts evaluating the population demographics of a lake-wide populations exposed to varying control and environmental scenarios. Priority areas for research include investigating if temperatures have increased in sea lamprey-producing streams in response to climate change, using close-kin mark-recapture to mark family groups at age 1 to age large larvae and transformers years later, and determining if sex determination is environmentally mediated by larval growth and density. (C) 2020 The Authors. Published by Elsevier B.V. on behalf of International Association for Great Lakes Research.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available