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)$| than the fecundity of those in C. atratum and M. nodulosa.
In relation to how big the folks, the fresh new fecundity out of ovigerous female regarding comparable versions (step 3.0- so you’re able to cuatro.5-mm SL) consuming L. nassa and P. auritula shells wasn’t rather additional |$(P = 0.228)$|? , as fecundity away from ovigerous females measuring dos.0- to three.0-mm SL inhabiting C. atratum is actually rather greater than that of people of one’s same size during the M. nodulosa shells.
Dialogue
The fresh P. tortugae people studies found a leading and continued reproductive activity on Anchieta Island. The brand new fecundity registered are homogeneous throughout every season, therefore the lowest variability registered is possibly pertaining to capital occupation (shells) and you can variations in creature proportions. Generally speaking, P. tortugae fecundity, eggs diameter, and you may eggs volume exhibited a tendency to boost with growing SL.
It is explained by lifestyle stage regarding P
The fresh new bimodality in dimensions-frequency shipment (full and you may monthly) based in the ovigerous females’ people is uncommon and might reflect recruitment pulses or behavioural distinctions ( Diaz and you can Conde, 1989). tortugae that happens over a period of 24 months, with clear continuity in individual progress. The second level in size-regularity shipping on the huge proportions kinds corresponded in order to an effective recruitment of people about second seasons out-of lives, and therefore belonged towards basic top in dimensions-regularity shipment in the last 12 months, and the like ( Mantelatto and you can Sousa, into the push).
In line with the shorter size of ovigerous lady captured (1.8 mm regarding SL), we feel one sexual maturity may occur earlier in the lifetime course from P. tortugae here. Predicated on Lancaster (1990), the current presence of brief ovigerous women often means this new adaptation of the latest kinds in order to local layer availableness mainly whenever enough shells is actually not available. Wada et al. (1995) boosted the hypothesis out of precocious reproductive invention whenever adequate shells try scarce.
Regardless of the trouble one of several Pagurus, Paguristes, plus the “Pylopagurus-like” variety (come across inclusion), a comparative research regarding fecundity try held. The fresh fecundity filed to own datehookup-ondersteuning P. tortugae on the Anchieta Island was lower than one stated to other diogenid hermit crabs (to have a review, discover Dining table We in the Mantelatto and you may Garcia, 1999), as well as that it species learned by the Negreiros-Fransozo et al. (1992). This reality can be regarding brand new interspecific race on the analyzed city, in which P. tortugae interacts with other hermit kinds ( Mantelatto and you can Garcia, 2001). Additionally, we may assume that the lower fecundity from the kinds happened while the a purpose of the low size of P. tortugae women compared to the most other diogenids cited, plus regards to the populace read because of the Negreiros-Fransozo et al. (1992).
A variety in the number of eggs is seen within the same size class, most likely exhibiting a method off several spawning in exact same reproductive 12 months ( Ameyaw-Akumfi, 1975; Fotheringham, 1976; Varadara, 1982; Mantelatto and you can Fransozo, 1997; Mantelatto and you can Garcia, 1999). This type into the fecundity by the proportions classification was influenced sometimes by the how many spawns in identical reproductive duration or from the inadequate layer occupancy. The lower fecundity noticed in people happen while the a work of visibility out of most young ovigerous women believed to-be spawning for the first time. Based on Somerton and you can Meyers (1983), such primiparous people produce a reduced amount of eggs than multiparous of these. The fresh bimodality out of people build helps which hypothesis.
