Estimates of growth and mortality of under-yearling smallmouth bass in Spednic Lake, from 1970 through 2008

Scientific Investigations Report 2014-5164
Prepared in cooperation with the International Joint Commission St. Croix River Watershed Board and the Maine Bureau of Sea Run Fisheries and Habitat
By:  and 

Links

Abstract

This report is the product of a 2013 cooperative agreement between the U.S. Geological Survey, the International Joint Commission, and the Maine Bureau of Sea Run Fisheries and Habitat to quantify the effects of meteorological conditions (from 1970 through 2008) on the survival of smallmouth bass (Micropterus dolomieu) in the first year of life in Spednic Lake. This report documents the data and methods used to estimate historical daily mean lake surface-water temperatures from early spring through late autumn, which were used to estimate the dates of smallmouth bass spawning, young-of-the-year growth, and probable strength of each year class. Mortality of eggs and fry in nests was modeled and estimated to exceed 10 percent in 17 of 39 years; during those years, cold temperatures in the early part of the spawning period resulted in mortality to fish that were estimated to have had the longest growing season and attain the greatest length. Modeled length-dependent overwinter survival combined with early mortality identified 1986, 1994, 1996, and 2004 as the years in which temperature was likely to have presented the greatest challenge to year-class strength in the Spednic Lake fishery. Age distribution of bass in fisheries on lakes in the St. Croix and surrounding watersheds confirmed that conditions in 1986 and 1996 resulted in weak smallmouth bass year classes (age-four or age-five bass representing less than 15 percent of a 100-fish sample).

Additional publication details

Publication type Report
Publication Subtype USGS Numbered Series
Title Estimates of growth and mortality of under-yearling smallmouth bass in Spednic Lake, from 1970 through 2008
Series title Scientific Investigations Report
Series number 2014-5164
DOI 10.3133/sir20145164
Year Published 2014
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) New England Water Science Center
Description v, 15 p.
Time Range Start 1970-01-01
Time Range End 2008-12-31
Country Canada, United States
State Maine
Other Geospatial Spednic Lake
Projection Universal Transverse Mercator projection
Scale 24000
Online Only (Y/N) Y
Additional Online Files (Y/N) N