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Reproduction ofChondrus crispus Stackhouse (Rhodophyta,Gigartinales) in sublittoral Prince Edward Island,Canada
Authors:María L. Lazo  J. L. McLachlan
Affiliation:1. Department of Biology, Dalhousie University, Halifax, NS, B3H 4JI, Canada
2. National Research Council, 1411 Oxford St., Halifax, NS, B3H 3Z1, Canada
Abstract:The influence of size (as biomass), morphology and depth on reproductive patterns was examined in populations ofChondrus crispus in the sublittoral zone of Prince Edward Island, Canada. Fronds of ≥ 10 mg wet wt were considered, and a minimum biomass could not be related to reproduction. However, as frond biomass increased, the frequency of reproductive structures also increased. Reproductive maturity was related to the number of dichotomies. Fronds with less than two dichotomies were only occasionally reproductive, while those with two or more dichotomies could bear sori. Depth in the Prince Edward Island environment had no apparent influence on reproductive maturity, and there was no apparent relationship between depth and the vertical distribution of cystocarpic or tetrasporic fronds.
Keywords:Chondrus crispus   depth  gametophytes  Irish moss  morphology  reproduction  size  sporophytes
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