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)$| than the fecundity of those in C. atratum and M. nodulosa.
With regards to how big people, the latest fecundity away from ovigerous ladies regarding similar types (step 3.0- to 4.5-mm SL) consuming L. nassa and instabang you may P. auritula shells wasn’t notably different |$(P = 0.228)$|? , once the fecundity out of ovigerous ladies calculating dos.0- to 3.0-mm SL inhabiting C. atratum was rather more than regarding the individuals of your own same dimensions into the Meters. nodulosa shells.
Discussion
The new P. tortugae inhabitants training revealed a leading and you may persisted reproductive pastime to the Anchieta Island. The fresh fecundity filed is homogeneous year round, plus the reduced variability inserted is maybe related to financing profession (shells) and variations in creature proportions. Generally, P. tortugae fecundity, egg diameter, and egg regularity demonstrated a tendency to boost with broadening SL.
This can be explained because of the existence cycle away from P
The brand new bimodality in dimensions-regularity shipping (overall and month-to-month) based in the ovigerous females’ society try strange and may also reflect employment pulses otherwise behavioural differences ( Diaz and Conde, 1989). tortugae that happens during a period of a couple of years, that have obvious continuity in private increases. The following top in dimensions-frequency shipments throughout the huge proportions kinds corresponded to help you a powerful employment men and women regarding the 2nd seasons out-of life, which belonged for the first top sizes-volume delivery in the earlier 12 months, etc ( Mantelatto and Sousa, when you look at the press).
According to the reduced sized ovigerous lady captured (step one.8 mm regarding SL), we feel one to intimate maturity may occur earlier regarding the lifetime stage regarding P. tortugae in this region. Considering Lancaster (1990), the existence of quick ovigerous females can indicate new type of the latest variety to help you local layer supply generally whenever enough shells try not available. Wada ainsi que al. (1995) raised the hypothesis out of precocious reproductive development whenever adequate shells was scarce.
Inspite of the troubles among the Pagurus, Paguristes, in addition to “Pylopagurus-like” varieties (pick addition), a comparative analysis out-of fecundity are presented. New fecundity recorded to possess P. tortugae to the Anchieta Area is actually lower than you to said to other diogenid hermit crabs (to possess an evaluation, get a hold of Table We in the Mantelatto and you can Garcia, 1999), as well as for it kinds read of the Negreiros-Fransozo et al. (1992). This reality could be related to the brand new interspecific battle about examined town, in which P. tortugae communicates together with other hermit varieties ( Mantelatto and you can Garcia, 2001). In addition, we might assume that the lower fecundity from the types took place due to the fact a function of the reduced size of P. tortugae women versus other diogenids quoted, plus regards to the people analyzed of the Negreiros-Fransozo ainsi que al. (1992).
A difference into the quantity of eggs is noticed in exact same dimensions category, most likely indicating a process from numerous spawning in the same reproductive year ( Ameyaw-Akumfi, 1975; Fotheringham, 1976; Varadara, 1982; Mantelatto and you may Fransozo, 1997; Mantelatto and you will Garcia, 1999). So it type inside fecundity of the size class is actually swayed often because of the the amount of spawns in identical reproductive duration or because of the useless layer occupancy. The lower fecundity noticed in many people happen given that a work of presence away from most young ovigerous ladies thought are spawning the very first time. Centered on Somerton and you may Meyers (1983), such primiparous female generate a lower life expectancy amount of egg than multiparous of these. New bimodality away from populace construction supporting so it theory.