Search Chum

Share Chum
RSS Chum
Translate Chum

« Save the Tarpon Shindig | Main | 2012 Slab of the Year Winners »
Tuesday
Feb122013

Fish Ladders and Elevators Not Working

For reasons no one completely understands, fish ladders and elevators are not helping fish at some mainstem dams in the East.

Scientists and engineers set targets for the transport capacity of fish passages. And yet, the study lays bare that those targets are being missed by orders of magnitude. For instance, the first Merrimack River dam aims to let 300,000 river herring pass through; the mean number for the years 2008 to 2011 was 706 per year. The goal at the first Connecticut River dam is 300,000 to 500,000 fish. There, the mean for those same years was 86. And for the Susquehanna, the goal is 5 million river herring spawning above the fourth dam, which passed an average of seven herring from 2008 to 2011. This means that very few fish are reaching quality breeding grounds, which has likely contributed to the decimation in river herring populations.

LINK (via:Science)

PrintView Printer Friendly Version

References (2)

References allow you to track sources for this article, as well as articles that were written in response to this article.
  • Response
    NFL is definitely 1 of the most significant sports in America. It has a big following.
  • Response
    Response: have a peek here
    Excellent Webpage, Preserve the good job. With thanks.

Reader Comments

There are no comments for this journal entry. To create a new comment, use the form below.

PostPost a New Comment

Enter your information below to add a new comment.

My response is on my own website »
Author Email (optional):
Author URL (optional):
Post:
 
Some HTML allowed: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <code> <em> <i> <strike> <strong>