6). Fecundity was significantly higher |$(P = 0.001) \ $| in ovigerous females occupying heavier shells |$( <\rm>\gt 3.0 \ <\rm>)$|? . Significant differences |$(P \lt 0.05)$| were registered in fecundity of ovigerous females of different sizes. The number of eggs produced by ovigerous females measuring more than 3.1-mm SL was higher |$(P = 0.001)$| than the fecundity of those females measuring 1.8- to 3.0-mm SL. In relation to the shell species, the fecundity of the ovigerous females in L. nassa and P. auritula shells (the larger ones) was not significantly different, nor was that of the ovigerous females occupying C. atratum and M. nodulosa shells. However, the number of eggs produced by the ovigerous females inhabiting P. auritula shells was significant higher |$(P = 0.001)$| than the fecundity of those in C. atratum and M. nodulosa.
When considering the dimensions of the individuals, the newest fecundity off ovigerous ladies of equivalent systems (step three.0- to help you cuatro.5-mm SL) occupying L. nassa and P. auritula shells was not somewhat various other |$(P = 0.228)$|? , as fecundity regarding ovigerous female calculating dos.0- to three.0-mm SL inhabiting C. atratum are somewhat more than that the folks of the exact same size when you look at the Yards. nodulosa shells.
Talk
New P. tortugae society degree shown a top and you may continued reproductive activity towards the Anchieta Area. The newest fecundity filed is actually homogeneous all year long, and the low variability registered was possibly connected with funding career (shells) and you may differences in creature size. Typically, P. tortugae fecundity, eggs diameter, and you can egg regularity exhibited a propensity to increase that have broadening SL.
This really is said from the life cycle out-of P
The newest bimodality in size-regularity shipments (overall and monthly) found in the ovigerous females’ society is actually strange and may mirror recruitment pulses or behavioral distinctions ( Diaz and Conde, 1989). tortugae that takes place during a period of two years, having clear continuity from inside the individual increases. The following height sizes-frequency shipping regarding the larger size groups corresponded to a robust recruitment of men and women throughout the second seasons out-of lives, and that belonged with the earliest height in proportions-volume shipments in the earlier year, and stuff like that ( Mantelatto and Sousa, inside drive).
In line with the smaller sized ovigerous girls captured (1.8 mm off SL), we believe you to sexual readiness may possibly occur prior to regarding lifetime period out of P. tortugae here. According to Lancaster (1990), the current presence of quick ovigerous female can indicate the fresh adaptation of the new types in order to regional shell availability generally whenever adequate shells is not available. Wada et al. (1995) boosted the hypothesis away from precocious reproductive creativity whenever adequate shells are scarce.
Despite the trouble among the Pagurus, Paguristes, and “Pylopagurus-like” types (find introduction), a relative study from fecundity are used. The newest fecundity filed to own P. tortugae into Anchieta Island is actually below one advertised some other diogenid hermit crabs (for a review, come across Dining table We when you look at the Mantelatto and you will Garcia, 1999), as well as which kinds read by Negreiros-Fransozo et al. (1992). This reality are related https://datingranking.net/nl/dating4disabled-overzicht to the newest interspecific race regarding the examined town, where P. tortugae interacts together with other hermit species ( Mantelatto and you can Garcia, 2001). Additionally, we might assume that the low fecundity for the variety taken place while the a function of the lower size of P. tortugae lady compared to almost every other diogenids quoted, and also in reference to the population studied from the Negreiros-Fransozo et al. (1992).
A variety when you look at the amount of eggs was noticed in the same proportions class, most likely indicating a method off numerous spawning during the same reproductive season ( Ameyaw-Akumfi, 1975; Fotheringham, 1976; Varadara, 1982; Mantelatto and you will Fransozo, 1997; Mantelatto and you may Garcia, 1999). This version for the fecundity of the dimensions classification are swayed sometimes by just how many spawns in identical reproductive cycle or from the useless cover occupancy. The low fecundity present in some individuals happen given that a work of your own presence out-of extremely younger ovigerous females thought become spawning for the first time. Centered on Somerton and Meyers (1983), such primiparous female generate a lesser number of eggs than simply multiparous ones. The bimodality from society structure supports which hypothesis.