. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. HERMIT CRAB LIFE HISTORIES 333 29 • AUGUST 1990 I D MAY 1991. 60 - 50 - 30 20 10 - P. annulipes P. pollicaris P. longicarpus Figure 3. Reproductive allocation among three hermit crabs on two dates. Reproductive allocation = total dry weight of brood/(total dry crab weight-dry weight of brood). Vertical bars are standard errors and sample sizes are given above error bars. See text for statistical interpre- tation. No data (nd) were collected for P. pollicaris during August 1990 due to a lack of reproductive activity at this t
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. HERMIT CRAB LIFE HISTORIES 333 29 • AUGUST 1990 I D MAY 1991. 60 - 50 - 30 20 10 - P. annulipes P. pollicaris P. longicarpus Figure 3. Reproductive allocation among three hermit crabs on two dates. Reproductive allocation = total dry weight of brood/(total dry crab weight-dry weight of brood). Vertical bars are standard errors and sample sizes are given above error bars. See text for statistical interpre- tation. No data (nd) were collected for P. pollicaris during August 1990 due to a lack of reproductive activity at this time. a one-way ANOVA revealed a significant effect of species (F2,73 = , P = ), and post hoc comparison of the means using the Tukey HSD procedure revealed a sig- nificant difference between P. annulipes and both P. lon- gicarpus (P = ) and P. pollicaris (P = ) but no significant difference between P. longicarpus and P. pol- licaris (P = ). There were striking differences in seasonal patterns of reproductive activity among the three species (Fig. 4). A single ovigerous P. annulipes was collected on 28 April; however, both males and females were extremely scarce at this time. By 15 May, individual P. annulipes had emerged from the sediments and were easily collected. The proportion of ovigerous females increased from 38% in May to 82% in June and remained high (>60%) until September, when a mean of of the population was ovigerous. The reproductive season appeared to be over by 6 October, when 29 females were collected and none was ovigerous. In contrast to P. annulipes. active P. lon- gicarpus and P. pollicaris were collected at the earliest sampling date of 31 March. No ovigerous specimens of P. longicarpus were observed on this date (n = 3), but reproductive activity was high during the following month of April, with a mean of ovigerous. Reproduction declined during May and June to 0% in July but increased to in August and in
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
