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 integrated anybody thought to sexually immature

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 https://datingranking.net/local-hookup/grande-prairie/ system phase people were introduce throughout the day and on a consistent basis both in the field observations used off , and in the latest captive examination of 2002. Operating-system phase everyone was perhaps not observed in occupation observations held during the later . Just like the no factor is based in the month-to-month volume of the newest Os stage one of people obtained from (Pearson chi-rectangular goodness out of fit, [chi square] = step 1.19, df = dos, P = 0.55), investigation of all males amassed regarding during this period was indeed pooled for additional data. Through that several months, Os phase guys were amassed non-stop and demonstrated no significant differences in volume according to the time frame grabbed (Pearson chi-rectangular god of fit, [chi square] = step one.thirty-six, df = dos, p = 0.51). Also, the latest regularity out-of Operating system stage males didn’t disagree rather certainly one of brand new four top stages of one’s lunar course (Pearson chi-rectangular, [chi-square] = cuatro.45, df = step 3, P = 0.22).

Operating-system stage men obtained away from varied in size away from 165 in order to 386 mm SL, and you can calico phase males accumulated during that time several months varied into the proportions out-of 170 to 397 mm SL (Profile 6). The fresh indicate amount of gathered Operating-system phase people ( mm) are notably greater than the fresh suggest amount of amassed calico stage guys ( mm; Mann-Whitney, You = 5455.0, df = 247, P = 0.001). Although not, that it result was not experienced naturally significant, as mature P. clathratus build to help you lengths greater than 700 mm SL (Love et al. 1996). The scale selection of captive Operating system phase men (211 so you’re able to 348 mm SL) is like attentive calico stage males (212 so you can 343 mm SL). Operating system stage someone observed in industry ranged in the estimated size off 2 hundred so you can five hundred mm SL, when you are calico stage people noticed ranged in size off a hundred so you’re able to 500 mm SL.

The brand new estimated spawning seasons considering GSI and you may maturity investigation displayed a pattern much like the month-to-month regularity regarding gathered 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).