Factors Affecting Recruitment of Age‐0 Muskellunge in Escanaba Lake, Wisconsin, 1987–2006
| Autor: | David M. Dolan, Lawrence D. Eslinger, Steven P. Newman |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Catostomus
education.field_of_study Ecology biology Age structure Pimephales Population Zoology Management Monitoring Policy and Law Aquatic Science biology.organism_classification Fishery Esox masquinongy Abundance (ecology) Fish Bluntnose minnow education Ecology Evolution Behavior and Systematics |
| Zdroj: | North American Journal of Fisheries Management. 30:908-920 |
| ISSN: | 1548-8675 0275-5947 |
| DOI: | 10.1577/m09-114.1 |
| Popis: | We modeled variation in recruitment (R) of age-0 muskellunge Esox masquinongy to identify factors influencing their abundance in Escanaba Lake, Wisconsin. Muskellunge R declined over the study period and ranged from 0.00 to 1.85 age-0 fish/km of shoreline (mean = 0.42 age-0 fish/km of shoreline). A Ricker stock–recruitment model determined that the following factors explained 88% of the variation in annual R of age-0 muskellunge between 1987 and 2006: abundance and age structure of the adult muskellunge population, abundance of bluntnose minnow Pimephales notatus, abundance of age-3 and older (age-3+) walleyes Sander vitreus, abundance of age-0 white suckers Catostomus commersonii, and coefficient of variation (CV) of May water temperatures. Abundance of adult muskellunge (≥76.2 cm total length) accounted for only 1% of the variation in R and showed no significant relationship with R. Abundance of bluntnose minnow improved the model fit to 40% of the variation in R and indicated that higher R was... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text