. The Canadian field-naturalist. 1984 MooDiE: Status of the Giant Stickleback 17. Figure 2. Distribution of the Giant Stickleback. Courtesy of D. E. McAllister, National Museum of Natural Sciences. summer. During the breeding season males probably complete about five nesting cycles and then die. The number of clutches produced by females is not known, but they too, probably reproduce only during their third summer and then die. Females produce an aver- age of 257 eggs per clutch. The Giant Stickleback, like other members of the genus, is territorial. Nesting males are found in clumps where the
. The Canadian field-naturalist. 1984 MooDiE: Status of the Giant Stickleback 17. Figure 2. Distribution of the Giant Stickleback. Courtesy of D. E. McAllister, National Museum of Natural Sciences. summer. During the breeding season males probably complete about five nesting cycles and then die. The number of clutches produced by females is not known, but they too, probably reproduce only during their third summer and then die. Females produce an aver- age of 257 eggs per clutch. The Giant Stickleback, like other members of the genus, is territorial. Nesting males are found in clumps where the substrate is sand or gravel and there is some shelter such as Fontinalis or rocks. The reproductive rate in Mayer Lake appears to be normal. Movement of the Giant Stickleback is limited, it appears to spend its entire life within the lake. During a three-month period from May to August, males concentrate in localities where there is a sand sub- strate, a gentle gradient, and vegetation. These spawn- ing areas are unprotected, but are widespread. The Giant Stickleback feeds in the limnetic zone on zooplankton. It is tolerant of human disturbance and responds readily to change. Unfortunately, it is its ability to respond to change that makes change unde- sirable. Response to change could lead to adaptive alterations of the phenotype and hybridization with the typical sticklebacks of the streams, in which case the unique nature of the Giant Stickleback would be lost even though population densities might not change. This stickleback is susceptible to fluctuations in water level through its dependence on shallow. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ottawa Field-Naturalists' Club. Ottawa, Ottawa Field-Naturalists' Club
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