GSI regarding one another sexes increased away from April to help you Summer, peaked for the June, and you may steadily declined on june 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 integrated anybody believed to intimately 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-system phase people were expose all the time and on a great consistent basis in both the field observations held of , as well as in the fresh new attentive examination of 2002. Os phase individuals were maybe not noticed in occupation findings used in the late . Once the zero factor is actually found in the monthly regularity off the latest Os phase certainly people gathered away from (Pearson chi-square god off fit, [chi-square] = 1.19, df = 2, P = 0.55), analysis off all of the men collected of during this time was in fact pooled for further studies. Throughout that months, Operating system stage guys was basically obtained from day to night and you can presented zero significant variations in regularity according to the period of time grabbed (Pearson chi-rectangular god away from complement, [chi square] = step 1.thirty six, df = dos, p = 0.51). Moreover, the brand new regularity away from Operating-system phase people did not differ rather certainly one of the newest five https://datingranking.net/local-hookup/brighton-2/ first phases of your lunar years (Pearson chi-square, [chi square] = 4.forty five, df = 3, P = 0.22).

Operating-system phase people accumulated out-of varied sizes out-of 165 to help you 386 mm SL, and calico stage people gathered during those times months ranged within the size from 170 so you’re able to 397 mm SL (Shape 6). The newest mean duration of built-up Operating-system phase boys ( mm) is somewhat more than brand new suggest period of built-up calico stage people ( mm; Mann-Whitney, U = 5455.0, df = 247, P = 0.001). Although not, it result was not thought biologically tall, just like the mature P. clathratus build to help you lengths greater than 700 mm SL (Love mais aussi al. 1996). The dimensions variety of attentive Operating system stage males (211 so you can 348 mm SL) was like attentive calico phase boys (212 to 343 mm SL). Operating-system phase somebody present in industry ranged into the estimated dimensions away from two hundred in order to five-hundred mm SL, if you are calico phase individuals noticed varied in dimensions out of one hundred in order to five-hundred mm SL.

The fresh new estimated spawning seasons considering GSI and you will maturity studies showed a period very similar to the monthly frequency 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).

Leave a Reply

Your email address will not be published.