Fernando L. Meters. Mantelatto, Vera F. Alarcon, Renata B. Garcia, Egg Design Procedures of the Exotic Hermit Crab Paguristes Tortugae away from Brazil, Journal off Crustacean Biology, Frequency 22, Procedure dos, 1975-99990246
Conceptual
The aim of the present study was to characterize the total and seasonal fecundity of the hermit crab Paguristes tortugae as well as the influence of shell type on fecundity using the morphometric relationship. Ovigerous females were collected monthly from January to December, 1998, in the infralittoral region of Anchieta Island. Samplings were performed using SCUBA. The hermit crabs and the gastropod shells were measured. Hermit wet weight and shell dry weight were recorded. For the fecundity analysis, only ovigerous females with the eggs in the early phase of development were selected. The number of eggs carried by individuals of several sizes (shield length), condition of development, and egg size were determined. A high percentage (%) of ovigerous females with eggs in the early phase of development were captured, with a low frequency (4.29%) of females with eggs in the final stage https://datingranking.net/nl/flirtymature-overzicht/ of development. Size-frequency distribution during the months showed two peaks in the ovigerous female population (2.5 to 3.4 mm and 4.0 to 5.4 mm of SL). |$ <\rm>\pm <\rm>$| fecundity was |$132 \pm 102$| eggs and tended to increase with increasing SL. No significant difference in fecundity occurred among the various seasons of the year. The results showed continuous and elevated reproduction of P. tortugae, with a high reproductive potential for the population. The pattern of the frequency distribution of ovigerous females tending to bimodality may be characteristic of a population with a two-year life cycle. Considering the four shells most occupied by P. tortugae (Pisania auritula, Cerithium atratum, Morula nodulosa, and Leucozonia nassa), the highest fecundity was observed for ovigerous females occupying larger shells (P. auritula and L. nassa). The reproductive aspects of P. tortugae were related to strategies developed to compensate for interspecific competition, i.e., high and continuous reproductive effort, early maturity, low fecundity, and larger eggs produced.
Training for the reproductive methods out-of Anomura were eliciting expanding need for look at the fact that hermit crabs depict an fascinating category off a physical and you can evolutionary view ( Mantelatto and Garcia, 1999). This group comprises over 800 types of the brand new hermit crabs of the globe features been through big upgrade ( Ingle, 1993).
Hermit crabs depict a significant part of the of several intertidal and you will meagerly strong benthic groups, in which it gamble a crucial role on marine system ( Fransozo and Mantelatto, 1998). However, partners research has started used with the lives records otherwise reproductive ecology regarding hermit crabs in contrast to most other decapods.
Fecundity is a vital factor for the crustaceans, and others, to own deciding this new reproductive possible of a varieties and you may/otherwise of the stock measurements of a populace ( Mantelatto and Fransozo, 1997), perhaps describing the newest reproductive adaptations to help you environmental requirements ( Sastry, 1983). Hermit crabs in particular, while they live in gastropod shells, pay for the opportunity to research brand new correspondence between financing and you may reproductive method. Predicated on Wilber (1989), a great woman’s layer can affect her reproduction from the choosing whether or not or not she will get ovigerous and you will/otherwise restricting how many eggs lead. So it publisher experienced multiple aspects of the new cover-size/reproduction relationship, particularly towards differences in eggs development in relation to this new kinds, proportions, frequency, and you can pounds of your own cover occupied.
Eggs Manufacturing Methods of your own Exotic Hermit Crab Paguristes Tortugae away from Brazil
While doing so, around three sets of hermit crab particularly (i.elizabeth., the latest genera Pagurus and you can Paguristes, and “Pylopagurus-like” species), was an emotional class to examine because the many variety are identified from singular or a few localities, and some nevertheless-undescribed types are recognized to occur in the spot, ultimately causing big identification issues certainly one of experts and nonspecialists similar ( Hendrickx and you may Harvey, 1999). Paguristes tortugae Schmitt, 1933, are a comparatively popular species marketed regarding the Western Atlantic out-of Fl to Brazil (due to the fact much south as the Santa Catarina State) ( Rieger and you may Giraldi, 1997; Melo, 1999). Inspite of the pair papers on the general biology out-of pagurids, P. tortugae might have been apparently well-studied (see Mantelatto and you may Sousa, in the drive, to have opinion).
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