Population and reproductive features of the western Atlantic hermit crab Pagurus criniticornis (Anomura, Paguridae) from Anchieta Island, southeastern Brazil

The population of the hermit crab Pagurus criniticornis (Dana, 1852) was studied based on seasonal abundance, size frequency distribution, sex ratio, reproductive period, fecundity and shell relationship. Specimens were collected monthly by SCUBA diving in the infralittoral area of Anchieta Island, Ubatuba. A total of 1,017 individuals was analyzed. Animal size (minimum and maximum shield length, respectively) was 0.7 and 2.9 mm for males, 0.6 and 2.8 mm for non-ovigerous females, and 1.0 and 2.5 mm for ovigerous females. The sex ratio was 1:1.29. Sexual dimorphism was recorded by the presence of males in the largest size classes. Ovigerous females were captured during all months along the year, with percentages varying from 8% (July) to 84.3% (February) in relation to the total females collected. Mean ± SD fecundity was 168 ± 125 eggs and tended to increase with increasing hermit size. Shells of four gastropod species [Cerithium atratum (Born, 1778), Morula nodulosa (Adams, 1845), Anachis lyrata (Sowerby, 1832) and Modulus modulus (Linnaeus, 1758)] were occupied by ovigerous females of P. criniticornis but fecundity was not significantly different in relation to the different shell types. The profile showed continuous and intense reproduction of P. criniticornis probably related to strategies developed to compensate for interspecific competition in the studied insular area.

The mammalian fauna of Madura Cave, Western Australia, Ernest L. Lundelius, Jr. -- William D. Turnbull --.

n.s. no.6(1981)

Revised phylogeny and functional interpretation of the Edrioasteroidea based on new taxa from the Early and Middle Ordovician of western Utah / Thomas E. Guensburg --, James Sprinkle --.

n.s. no.29(1994)

The mammalian fauna of Madura Cave, Western Australia : Ernest L. Lundelius, Jr. -- and William D. Turnbull --.

v.31:no.1(1973)

The mammalian fauna of Madura Cave, Western Australia. Ernest L. Lundelius, Jr. -- William D. Turnbull --.

n.s. no.17(1989)

The mammalian fauna of Madura Cave, Western Australia : Ernest L. Lundelius, Jr. -- and William D. Turnbull --.

v.38(1978)

The mammalian fauna of Madura Cave, Western Australia. Ernest L. Lundelius, Jr. --, William D. Turnbull --.

n.s. no.11(1982)

The Sawmill Site, a Reserve Phase village, Pine Lawn Valley, western New Mexico / Elaine A. Bluhm.

v.47:no.1(1957)

A list of Devonian fossils collected in western New York, with notes on their stratigraphic distribution. By Arthur Ware Slocom -- ; Oliver Cummings Farrington --

v.2:no.8(1906)

The mammalian fauna of Madura Cave, Western Australia : Ernest L. Lundelius, Jr. -- and William D. Turnbull --.

v.31:no.2(1975)

The genus Bostryx in central western Argentina: anatomical and distributional description of four of its southernmost species (Gastropoda, Bulimulidae)

ABSTRACT The genus Bostryx Troschel, 1847 is endemic to South America, extending from Ecuador to Chile and Argentina. The southernmost Argentinian species of the genus that inhabit San Luis, San Juan and Mendoza provinces, specially the pre-Andes, Andes and Sierras Pampeanas mountain ranges, were examined. This is the first time the anatomy of Bostryx pastorei (Holmberg, 1912), Bostryx reedi (Parodiz, 1947) and Bostryx strobeli (Parodiz, 1956) has been described.Bostryx cordillerae (Strobel, 1874) is re-described regarding shell and anatomy due to new morphological data. The main differences among the species examined are based on shell characters. The distribution ofBostryx mendozanus (Strobel, 1874) and Bostryx cuyanus (Pfeiffer, 1867), other species found in this region, was also discussed.

On the Phalangia and Pedipalpi collected by Professor Orton in western South America : with the description of new African species.

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