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)$| than the fecundity of those in C. atratum and M. nodulosa.
When it comes to how big is people, the fresh fecundity off ovigerous people regarding similar models (3.0- to help you 4.5-mm SL) consuming L. nassa and you can P. auritula shells wasn’t somewhat additional |$(P = 0.228)$|? , as the fecundity regarding ovigerous female measuring 2.0- to three.0-mm SL inhabiting C. atratum was somewhat more than that of individuals of your same dimensions within the Yards. nodulosa shells.
Talk
New P. tortugae populace education revealed a top and continuous reproductive activity on the Anchieta Isle. This new fecundity registered are homogeneous throughout every season, while the reasonable variability entered is actually maybe linked to financing community (shells) and you may variations in creature size. Typically, P. tortugae fecundity, eggs diameter, and you will egg regularity shown a propensity to raise with growing SL.
This might be said of the lives course regarding P
This new bimodality sizes-frequency distribution (complete and month-to-month) found in the ovigerous females’ population is uncommon and could mirror recruitment pulses otherwise behavioral differences ( Diaz and Conde, 1989). tortugae that happens over a period of 2 yrs, which have clear continuity during the private increases. The second level sizes-regularity shipping regarding the huge dimensions classes corresponded to help you an effective employment of individuals about 2nd year off life, which belonged on the first height sizes-regularity distribution in the last season, and so on ( Mantelatto and you may Sousa, inside the drive).
In accordance with the quicker measurements of ovigerous people caught (step one.8 mm regarding SL), we think one intimate maturity may possibly occur before on lifestyle years away from P. tortugae here. Based on Lancaster (1990), the current presence of small ovigerous ladies can indicate this new type out of the fresh variety to help you local shell supply primarily whenever sufficient shells is not available. Wada et al. (1995) boosted the theory regarding precocious reproductive development whenever adequate shells was scarce.
Despite the difficulties among Pagurus, Paguristes, additionally the “Pylopagurus-like” varieties (come across addition), a comparative study out-of fecundity try conducted. The newest fecundity filed having P. tortugae to the Anchieta Area is actually below one to stated for other diogenid hermit crabs (to own an assessment, pick Desk I inside Mantelatto and you may Garcia, 1999), and for so it types read of the Negreiros-Fransozo ainsi que al. (1992). This reality is generally associated with the brand new interspecific competition throughout the analyzed urban area, in which P. tortugae communicates with other hermit species ( Mantelatto and Garcia, 2001). In addition, we could possibly believe that the lower fecundity on the variety occurred since a purpose of the lower size of P. tortugae people as compared to most other diogenids cited, plus reference to the people examined from the Negreiros-Fransozo mais aussi al. (1992).
A variation https://datingranking.net/nl/colombian-cupid-overzicht for the quantity of eggs is actually seen in the exact same proportions classification, probably appearing something off numerous spawning within the same reproductive seasons ( Ameyaw-Akumfi, 1975; Fotheringham, 1976; Varadara, 1982; Mantelatto and you will Fransozo, 1997; Mantelatto and you may Garcia, 1999). It type during the fecundity of the size classification are influenced possibly from the what number of spawns in identical reproductive cycle otherwise by ineffective shell occupancy. The reduced fecundity observed in many people happens due to the fact a function of the exposure of extremely young ovigerous people thought to-be spawning for the first time. Based on Somerton and Meyers (1983), such primiparous females create a lower life expectancy quantity of egg than multiparous of these. The latest bimodality away from population design aids which theory.