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Articolo n° 665485 del 18 Luglio 2022 delle ore 08:40

Size is actually measured and you can intercourse was determined for 126 recaptured somebody which were women to start with get

Size is actually measured and you can intercourse was determined for 126 recaptured somebody which were women to start with get

In the recapture, 108 of them someone remained ladies, nine had entirely transitioned so you can men, and you will 9 was in fact amid transitioning. The fresh 126 recaptured people were most importantly to have 29–431 d. We restricted that it analysis to only people fish that have been at the higher for over 31 d because transition may appear within this good time period due to the fact brief while the six weeks (Benton and you may Berlinsky 2006). Shortly after 31 d, marked women had enough time to initiate sexual change yet not necessarily to-do the brand new change.

Using logistic regression, we estimated the distance in the 50% probability of gender change because the 355 mm TL (Profile 7). Most of the nine of one’s over sex changes occurrences took place female varying sizes away from 290 in order to 370 mm to start with bring; at the time of recapture, these freshly arranged male fish ranged of 326 so you’re able to 480 mm. The excess 9 Black colored Ocean Bass that were from inside the changeover at committed of recapture were a bit smaller compared to the newest 9 seafood which had complete gender transform; the fresh new transitional fish varied in proportions from 280 to 385 mm. Size on readiness for the Black colored Ocean Trout gratis uniforme online incontri is actually two hundred–250 mm (Wenner et al. 1986); for this reason, lady one to transitioned so you can men probably had aged and produced due to the fact girls one or more times before altering sex.

Sex is determined for 126 recaptured individuals who were defined as lady during marking. One of those 126 recaptures, nine got altered gender, 9 had been undergoing changeover, and you can 108 stayed lady. Size this is actually the average of your own size during the marking and the distance counted in the recapture. The latest vertical range implies the size during the 50% likelihood of intercourse transform (i.age., 355 mm TL).

Seasonality off Gender Change

Investigation off change costs indicated that women Black Sea Trout were more likely to changes gender during the most avoid of the spawning seasons and you may until the next spawning season than simply in the breeding months (May–October). Full, intercourse is computed to own a total of 107 females that have been tagged and recaptured for the exact same spawning seasons (); of them 107 females, 8 seafood altered gender for the spawning season, and you can 99 fish stayed people (Desk 2). In comparison, one of several twenty two lady that were as a whole along the cold temperatures and recaptured within the subsequent season, 8 anybody had changed intercourse and you will fourteen remained lady. According to the ratio of females you to definitely changed sex for the spawning 12 months (8 away from 107) and you will a year (8 from twenty two), the pace out of intercourse transform in spawning seasons is actually estimated on 0.07 (95% depend on interval [CI] = 0.03–0.13), and also the speed regarding sex change during the nonbreeding seasons is estimated on 0.36 (95% CI = 0.18–0.57; Figure 8).

Probability (P) out-of intimate transition in female Black colored Ocean Trout, plotted when it comes to seafood size (TL, mm)

Chances thickness mode with the rate (p) out-of intercourse change in Black colored Sea Trout within the spawning 12 months (May–October; dashed line) and you can ranging from reproduction seasons (we.e., within 2011 and you may 2012 12 months and you may between the 2012 and you may 2013 season; strong line). Of your own 107 tagged women that were recaptured into the same spawning season, 8 had changed intercourse otherwise had been during the changeover and you will 99 stayed female; the speed regarding sex transform while in the spawning months is estimated while the 0.07 (95% trust period [CI] = 0.03–0.13). Of your twenty-two marked females which were recaptured when you look at the next year’s spawning year, 8 had changed intercourse otherwise was during the change and you will 14 stayed ladies, recommending that rate out-of intercourse changes anywhere between spawning 12 months are 0.thirty six (95% CI = 0.18–0.57).

» F. Lammardo

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