05/26/2013

Lobsters Can Live in your Mooring

I think I took this at Northeast Harbor

Traditionally in Maine boats are moored in their harbors not with big anchors, but heavy chunks of granite. These chunks weigh 4000 lbs and tend to partially sink into the mud, which increases the holding power. From time to time the moorings are raise up to inspect the steel U or eye bolts and chains. Now a new Maine company has come up with a better idea, a mooring with holes where critters can live.

It’s a simple idea really, as long as so many people are putting big, heavy rocks onto the sea bottom, why not create a reef-like habitat? Habitat Mooring of Hamden, MaineĀ  has done just that, and at a price cheaper than granite.

from http://www.habitatmooring.com

I have always heard that concrete makes a poor choice for moorings because underwater it’s “lighter” than granite. All this means is that concrete is less dense and must weigh more on land in order to have the same weight under water. So to equal 4,000 lbs of granite on dry land (which is 2,500 pounds on the harbor bottom) the concrete mooring must weigh 4,450 lbs. The Habitat Mooring is cast of fiber-reinforced concrete and has 12 habitat holes to allow lobsters to find shelter at many times during their life cycles. But not only lobsters can live in the holes, “30 species of vertebrates and invertebrates, including lobster, Atlantic cod, flounder, pollack, sculpin, crabs and mollusks, as well as kelp and other important marine plants” were found on a mooring at Seal Harbor, Maine as compiled by Dr. Ian Bricknell, University of Maine, from dive videos taken in 2010 and 2011 by Mt. Desert Harbormasters Shawn Murphy and John Lemoine.*

As I get ready to launch Eleccentricity for another summer of lobstering, I find myself wishing I had a lobster habitat at the end of my mooring chain. The Habitat Mooring is available in four different sizes from Hamilton Marine.

* from APlaceToCallHome.pdf from the company website above.

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