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)$| than the fecundity of those in C. atratum and M. nodulosa.
About how big the individuals, the latest fecundity from ovigerous ladies from equivalent sizes (step 3.0- so you’re able to cuatro.5-mm SL) consuming L. nassa and you will P. auritula shells was not significantly different |$(P = 0.228)$|? , since the fecundity out of ovigerous women measuring dos.0- to 3.0-mm SL inhabiting C. atratum are notably greater than compared to the individuals of one’s exact same proportions when you look at the Yards. nodulosa shells.
Dialogue
The new P. tortugae people training revealed a leading and continuous reproductive pastime toward Anchieta Island. The newest fecundity submitted are homogeneous throughout the year, as well as the reasonable variability joined is possibly associated with investment career (shells) and differences in animal size. Overall, P. tortugae fecundity, eggs diameter, and you will egg frequency showed a tendency to boost which have increasing SL.
The latest bimodality in dimensions-regularity delivery (total and month-to-month) found in the ovigerous females’ populace is unusual and may mirror recruitment pulses or behavioural variations ( Diaz and Conde, 1989)
This really is said from the lives duration regarding P. tortugae that happens during a period of 24 months, having clear continuity inside the personal gains. The second top in dimensions-frequency shipment from the big dimensions classes corresponded to help you an effective employment of men and women throughout the 2nd seasons of lifetime, and this belonged into earliest top in size-regularity shipments in the last year, and so on ( Mantelatto and you can Sousa, into the force).
Based on the shorter sized ovigerous women captured (step 1.8 mm from SL), we believe you to intimate readiness may possibly occur before from the existence years from P. tortugae in this region. Centered on Lancaster (1990), the existence of small ovigerous lady often means brand new adaptation off new varieties so you’re able to regional cover access generally when adequate shells are not available. Wada ainsi que al. (1995) raised the theory away from precocious reproductive innovation when sufficient shells was scarce.
Inspite of the dilemmas among the Pagurus, Paguristes, plus the “Pylopagurus-like” variety (find introduction), a comparative study off fecundity are presented. The latest fecundity recorded to possess P. tortugae into the Anchieta Area is actually lower than one stated some other diogenid hermit crabs (to have an assessment, look for Desk I when you look at the Mantelatto and Garcia, 1999), and for which varieties analyzed by the Negreiros-Fransozo mais aussi al. (1992). This reality is generally about the brand new interspecific race about studied area, where P. tortugae interacts with other hermit variety ( Mantelatto and Garcia, 2001). Also, we would think that the reduced fecundity associated with the varieties occurred given that a purpose of the lower sized P. tortugae females versus most other diogenids quoted, as well as in regards to the population read from the Negreiros-Fransozo mais aussi al. (1992).
A difference from inside the quantity of eggs was observed inside same dimensions category, most likely demonstrating a method out-of several spawning into the same reproductive year ( Ameyaw-Akumfi, 1975; Fotheringham, 1976; Varadara, 1982; Mantelatto and you can Fransozo, 1997; Mantelatto and you may Garcia, 1999). Which type inside the fecundity because of the proportions class was influenced both from the the amount of spawns in identical reproductive duration otherwise because of the useless layer occupancy. The low fecundity present in many people takes place since a purpose https://datingranking.net/tr/chatspin-inceleme/ of your exposure regarding very younger ovigerous female presumed to get spawning for the first time. Based on Somerton and Meyers (1983), these types of primiparous people build a diminished level of eggs than multiparous ones. The bimodality out of inhabitants design supports that it theory.