GSI from one another genders increased off April to June, peaked in Summer, and gradually refuted on the summer and you can slide

Calico phase individuals were observed at both transect sites throughout the study period (Figure 4). OS phase males were observed at both transect sites from , where they increased in frequency over this period (Figure 4). Monthly variations in the proportion of OS phase individuals observed on transects were significantly different than expected at random for both the Intake Pipes site (Pearson chi-square goodness of fit, [chi square] = , df = 7, P < 0.01) and the Pumpernickel Cove site (Pearson chi-square goodness of fit, [chi square] = , df = 7, P < 0.01).

The latter included someone thought to intimately young

Mean monthly GSI of males (Figure 3) and females (Figure 5) remained low from January to April. GSI values of males and females were lowest in February and December. Monthly variations in male GSI (Kruskal-Wallis, KW = , df = 8, P < 0.01) and female GSI (Kruskal-Wallis, KW = , df = 8, P < 0.01) were significant. Males and females containing visibly ripe gonadal tissue were collected from May to October, and over 93% of adults collected from June to August were visibly ripe. Females with hydrated ovaries were collected from June through September, and the highest frequency of hydrated females occurred in July (Figure 5). The mean GSI of females with hydrated ovaries (5.79%) was significantly higher than the mean GSI of non-hydrated, ripe females (3.56%; unpaired t test, t = 7.78, df = 229, p < 0.01).

Operating system stage everyone was introduce from day to night as well as on a great consistent basis in both the field observations used of , plus brand new captive study of 2002. Os phase individuals were perhaps not observed in field observations used within the late . Once the zero factor is actually found in the month-to-month frequency from the latest Operating system stage among males obtained out of (Pearson chi-square goodness off complement, [chi square] = step one.19, df = dos, P = 0.55), data away from most of the males built-up off during this time period was indeed pooled for additional studies. Throughout that several months, Operating system phase guys was indeed collected for hours and you will shown no https://datingranking.net/local-hookup/brisbane/ high differences in volume depending on the time period grabbed (Pearson chi-square god out-of fit, [chi-square] = step one.36, df = 2, p = 0.51). Furthermore, this new volume off Os stage guys didn’t differ significantly among the brand new five first phases of the lunar period (Pearson chi-square, [chi square] = 4.45, df = step 3, P = 0.22).

Operating-system phase boys gathered out-of varied in size out of 165 in order to 386 mm SL, and calico phase males accumulated in those days months varied from inside the proportions out-of 170 so you’re able to 397 mm SL (Shape six). The fresh indicate period of compiled Operating-system phase guys ( mm) is somewhat greater than the new mean duration of compiled calico stage males ( mm; Mann-Whitney, You = 5455.0, df = 247, P = 0.001). not, that it result wasn’t noticed naturally extreme, once the mature P. clathratus develop so you can lengths of greater than 700 mm SL (Like ainsi que al. 1996). The size and style listing of captive Operating system stage men (211 to 348 mm SL) was like attentive calico stage boys (212 so you’re able to 343 mm SL). Operating system phase anybody observed in the field varied within the estimated proportions from 200 to help you five hundred mm SL, while calico stage people noticed ranged in size away from 100 to five-hundred mm SL.

This new estimated spawning year based on GSI and you can readiness study shown a routine much like the month-to-month regularity regarding amassed Operating-system stage males

The OS phase was present only in ripe males, whereas the calico phase was present in both ripe and unripe males. Sixty-seven percent of ripe males collected during 2001 were OS phase and 33% were calico phase. Among males collected from , the GSI range of OS males (0.42% to %) were similar to that of calico phase males (0.17 to %) (Figure 7a). However, the mean GSI of OS males (5.69%) was significantly higher than that of calico phase males (2.88%) collected from (Mann-Whitney, U = , df = 237, P < 0.01) (Figure 7b).