Unformatted text preview: EXST7015 Daily Design 24 Figure 4. Densities (clams per meter 2 ) of small soft- shell clams (<17 mm length) from experimental plots. Bars represent means, error bars represent 1 se. Letters Carefully read the description of the experiment below. Be prepared to answer the questions that follow the design description as a class quiz. In late May to early September 2001 the impact of Green Crab ( Carcinus Maenas L.) predation on soft-shell clams ( Mya arenaria ) was investigated with caging experiment carried out on an estuarine mudflat in Pomquet Harbour, Nova Scotia. Cages were constructed of plastic-coated wire, with a square mesh opening of 1×1 cm. Six replicate cages (0.83 m 2 ) were set up for each cage type. Cage types were as follows: (1) exclosure cages with no predators added, (2) control cages with 20×70 cm portions of each side removed allowing for unrestricted predator movement, (3) undisturbed mudflat 0.83 m 2 area adjacent to the cage matrix used as an uncaged control, (4)...
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This note was uploaded on 12/29/2011 for the course EXST 7015 taught by Professor Wang,j during the Fall '08 term at LSU.
- Fall '08