. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 196 WILLIAM C SUMMERS 5O. o pealei (Woods Hole) OBSERVED EXTRAPOLATED INTERPOLATED cf,9 MODAL SIZES,OFFSHORE •" MINOR COMPONENT B BREEDING ° VERRILL 1882 • HAEFNER 1964 YEARS (FROM APRIL FIRST) month were two year olds. Perhaps one-fourth of the egg deposition around June first was carried out by two year old females. Approximately 10% of the brood hatching ahead of the normal distribution would produce the skew size distribution. Thus, two year olds (mostly 18 and 19 months old) probably account for less than one-quart
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 196 WILLIAM C SUMMERS 5O. o pealei (Woods Hole) OBSERVED EXTRAPOLATED INTERPOLATED cf,9 MODAL SIZES,OFFSHORE •" MINOR COMPONENT B BREEDING ° VERRILL 1882 • HAEFNER 1964 YEARS (FROM APRIL FIRST) month were two year olds. Perhaps one-fourth of the egg deposition around June first was carried out by two year old females. Approximately 10% of the brood hatching ahead of the normal distribution would produce the skew size distribution. Thus, two year olds (mostly 18 and 19 months old) probably account for less than one-quarter of the total breeding population and contribute no more than one-third of the brood. Interbreeding between age groups is likely. In the laboratory, older males frequently breed with younger females and the natural age structure suggests the same is true in the field. Interbreeding of this sort should have no net effect on the proportions stated above. Unfortunately, these data cannot be used to estimate the survival from 11 months of age to 19 months because different broods are involved and recruitment is apparent for at least one of them. It is consistent to suggest that L. pealei is mainly annual and that mortality follows breeding in both sexes. Sexual maturity is deferred in some members of the November brood and sexual regression need not 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 Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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