Adaption of egg and larvae sampling techniques for lake sturgeon and broadcast spawning fishes in a deep river
Identifieur interne : 000717 ( Main/Exploration ); précédent : 000716; suivant : 000718Adaption of egg and larvae sampling techniques for lake sturgeon and broadcast spawning fishes in a deep river
Auteurs : E. F. Roseman [États-Unis] ; J. Boase [États-Unis] ; G. Kennedy [États-Unis] ; J. Craig [États-Unis] ; K. Soper [Canada]Source :
- Journal of Applied Ichthyology [ 0175-8659 ] ; 2011-11.
Abstract
In this report we describe how we adapted two techniques for sampling lake sturgeon (Acipenser fulvescens) and other fish early life history stages to meet our research needs in the Detroit River, a deep, flowing Great Lakes connecting channel. First, we developed a buoy‐less method for sampling fish eggs and spawning activity using egg mats deployed on the river bottom. The buoy‐less method allowed us to fish gear in areas frequented by boaters and recreational anglers, thus eliminating surface obstructions that interfered with recreational and boating activities. The buoy‐less method also reduced gear loss due to drift when masses of floating aquatic vegetation would accumulate on buoys and lines, increasing the drag on the gear and pulling it downstream. Second, we adapted a D‐frame drift net system formerly employed in shallow streams to assess larval lake sturgeon dispersal for use in the deeper (>8 m) Detroit River using an anchor and buoy system.
Url:
DOI: 10.1111/j.1439-0426.2011.01828.x
Affiliations:
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First, we developed a buoy‐less method for sampling fish eggs and spawning activity using egg mats deployed on the river bottom. The buoy‐less method allowed us to fish gear in areas frequented by boaters and recreational anglers, thus eliminating surface obstructions that interfered with recreational and boating activities. The buoy‐less method also reduced gear loss due to drift when masses of floating aquatic vegetation would accumulate on buoys and lines, increasing the drag on the gear and pulling it downstream. Second, we adapted a D‐frame drift net system formerly employed in shallow streams to assess larval lake sturgeon dispersal for use in the deeper (>8 m) Detroit River using an anchor and buoy system.</div></front></TEI><affiliations><list><country><li>Canada</li><li>États-Unis</li></country><region><li>Michigan</li></region></list><tree><country name="États-Unis"><region name="Michigan"><name sortKey="Roseman, E F" sort="Roseman, E F" uniqKey="Roseman E" first="E. 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