. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. REPRODUCTIVE CYCLES OF M. EDULIS 301. SHIN FIGURE 1. Mean reproductive condition for male and female Mytilus edulis from seven sites on the east coast of the United States. The reproductive condition, measured using stereology and expressed as Gamete Volume Fraction () varies between for a maximally ripe individual and for an individual with no discernible gametes. Each point is a mean value calculated from 12 mussels (see text for further details). ME = Damariscotta River, Maine; NH = Newcastle, New Hampshire;
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. REPRODUCTIVE CYCLES OF M. EDULIS 301. SHIN FIGURE 1. Mean reproductive condition for male and female Mytilus edulis from seven sites on the east coast of the United States. The reproductive condition, measured using stereology and expressed as Gamete Volume Fraction () varies between for a maximally ripe individual and for an individual with no discernible gametes. Each point is a mean value calculated from 12 mussels (see text for further details). ME = Damariscotta River, Maine; NH = Newcastle, New Hampshire; MA = Cape Cod Canal, Massachusetts; RI == Narragansett Bay, Rhode Island; SB = Stony Brook, New York; SHIN = Shinnecock, New York; DE = Broadkill Inlet, Delaware. Spaces within follicles which were observed when the mussels were maximally gravid were also counted in the GVF index. This was because the loss of gametes from these follicles probably only occurred either shortly before, or during the sampling process because the pressure from the rest of the gonad had not yet collapsed the intrafollicular space. The GVF can vary between zero, for a completely reproductively quiescent mussel, and one, for a mussel at peak reproductive con- dition. In this study, the mean of 10 estimates of the GVF of each animal (5 from each slide, cut from two different depths) was calculated and arcsine transformed (Sokal and Rohlf, 1969). Stereology is less subjective than the "index of bivalve gonad maturity" scheme proposed by Chipperfield (1953), where gonad squashes or stained sections are microscopically examined and assigned an arbitrary number (, Seed, 1976). Also, the Chipperfield technique does not fully recognize inter- mediate stages of development so the index results in nominal, rather than interval, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of the
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
