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)$| than the fecundity of those females measuring 1.8- www.datingranking.net/tr/elite-singles-inceleme/ to 3.0-mm SL. In relation to the shell species, the fecundity of the ovigerous females in L. nassa and P. auritula shells (the larger ones) was not significantly different, nor was that of the ovigerous females occupying C. atratum and M. nodulosa shells. However, the number of eggs produced by the ovigerous females inhabiting P. auritula shells was significant higher |$(P = 0.001)$| than the fecundity of those in C. atratum and M. nodulosa.
In terms of the dimensions of people, the fecundity out of ovigerous lady out-of similar types (step 3.0- to help you cuatro.5-mm SL) occupying L. nassa and you can P. auritula shells was not rather some other |$(P = 0.228)$|? , because fecundity regarding ovigerous female measuring dos.0- to three.0-mm SL inhabiting C. atratum are notably greater than compared to the individuals of your own exact same proportions from inside the Yards. nodulosa shells.
Discussion
The latest P. tortugae populace knowledge found a leading and you can continuous reproductive craft to your Anchieta Island. The fecundity submitted are homogeneous throughout the year, and also the reasonable variability registered are perhaps about funding profession (shells) and you will variations in creature proportions. As a whole, P. tortugae fecundity, eggs diameter, and eggs frequency presented a tendency to improve with expanding SL.
The bimodality in dimensions-regularity shipment (complete and you will monthly) found in the ovigerous females’ society is strange and may also mirror employment pulses or behavioral distinctions ( Diaz and Conde, 1989)
This really is explained because of the existence years out-of P. tortugae that takes place during a period of two years, having obvious continuity within the personal increases. Next height in size-regularity delivery from the big dimensions categories corresponded so you can a powerful recruitment of individuals on the 2nd year away from life, hence belonged to your earliest height sizes-frequency shipment in the earlier season, and the like ( Mantelatto and you will Sousa, within the push).
In accordance with the less sized ovigerous females seized (1.8 mm regarding SL), we think one to intimate readiness could happen before regarding the existence cycle out-of P. tortugae in this field. Based on Lancaster (1990), the clear presence of small ovigerous ladies can indicate the fresh new variation from new types to help you local cover access generally when adequate shells is actually unavailable. Wada mais aussi al. (1995) boosted the hypothesis off precocious reproductive invention when enough shells was scarce.
In spite of the trouble among Pagurus, Paguristes, as well as the “Pylopagurus-like” species (get a hold of addition), a comparative analysis away from fecundity is actually conducted. The new fecundity recorded to possess P. tortugae towards the Anchieta Island is actually below that said with other diogenid hermit crabs (to have an assessment, come across Dining table I into the Mantelatto and Garcia, 1999), and also for so it variety examined from the Negreiros-Fransozo ainsi que al. (1992). This particular fact are regarding the fresh new interspecific race regarding the studied town, in which P. tortugae communicates along with other hermit variety ( Mantelatto and Garcia, 2001). Additionally, we might think that the reduced fecundity regarding the varieties took place because a purpose of the lower measurements of P. tortugae females compared to almost every other diogenids quoted, and also in regards to the populace read from the Negreiros-Fransozo ainsi que al. (1992).
A variety within the quantity of egg are seen inside the same dimensions classification, most likely indicating a method away from several spawning during the exact same reproductive 12 months ( Ameyaw-Akumfi, 1975; Fotheringham, 1976; Varadara, 1982; Mantelatto and you will Fransozo, 1997; Mantelatto and Garcia, 1999). So it version from inside the fecundity because of the size classification are influenced sometimes by what amount of spawns in the same reproductive duration otherwise from the ineffective layer occupancy. The lower fecundity found in people happens because a function of one’s visibility of most young ovigerous women assumed getting spawning for the first time. Based on Somerton and you may Meyers (1983), these types of primiparous people produce a reduced number of eggs than multiparous ones. The fresh new bimodality off society build supporting so it theory.