Relative growth of Petrochirus diogenes (Linnaeus, 1758) (Crustacea, Anomura, Diogenidae) in the Ubatuba region, São Paulo, Brazil

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Population dynamics of Petrochirus diogenes (Crustacea, Anomura, Diogenidae) in the Ubatuba region, São Paulo, Brazil

This work examines the population dynamics of Petrochirus diogenes in the Ubatuba region (São Paulo, Brazil), focusing on size frequency distribution, sex ratio, and reproductive and recruitment period. Collections were made with two double-rig nets in the years 1993-1996. The 799 individuals obtained were separated into 14 size classes based on the length of the cephalothoracic shield. The shield size varied from 5.4 to 40.0 mm in males and from 5.7 to 32.1 mm in females. The size frequency distribution was unimodal for both sexes. Only small oscillations occurred in the sex ratio until the seventh size class, followed by preponderance of males. This suggests a standard pattern for the sex ratio in P. diogenes. As males were found in the largest size classes, they present a clear sexual dimorphism. This characteristic can be considered as a selective advantage, mainly during the mating processes and in the agonistic behavior. Ovigerous females were recorded in the spring and summer, indicating seasonal reproduction.

Reproductive apparatus of the male giant hermit crab Petrochirus diogenes (Anomura, Diogenidae): morphology and phylogenetic implications

We describe the male reproductive apparatus of the giant hermit crab Petrochirus diogenes, with morphological and biometric analyses of the spermatophore, the gonopore and the ultrastructure of the spermatozoa. Specimens were collected from the southern coast of Sao Paulo, Brazil. Morphological analyses were done using stereoscopic, light, transmission and scanning electron microscopy. The reproductive system of this hermit crab is composed of elongate and lobular testes followed by vasa deferentia that connect to the exterior via gonopores. The gonopores are ovoid and surrounded by setae, and each gonopore is composed of a membranous operculum that forms a depression constituting the gonopore opening. The gonopore constitutes a unique structure among the Diogenidae due to its number of setae. The spermatophores are tripartite, composed of a sperm-containing ampulla, a peduncle and a proximal foot. The spermatozoon has 3 main regions (acrosomal vesicle, nucleus and cytoplasm). The structure of the spermatophore indicates that this species can be considered an exception within Diogenidae with regard to spermatophore morphology and can therefore be used for phylogenetic inferences.

Die jüdischen Schüler des Antonius Musa Brasavola in Ferrara

David Kaufmann

Na 50 Nachlass Arthur Schopenhauer - 'Schopenhauer-Archiv', 437 - Zitatensammlung aus Seneca, Augustinus, Diogenes, Laertius, Juvenal

u.a.: spätere Nachträge;

Fragm. lat. VII 28 - Legendarium (Valentinus, Cath.s.Petri; Gregorius; Antonius de Padua, Marcellianus et Marcus, Gervasius et Protasius; Terentianus)

Trägerbände: Inc. oct. 436; Ms. Praed. 162; Vorbesitzer: Dominikanerkloster Frankfurt am Main

Rudolf Christians als Marcus Antonius, Rollenbild, Kniestück, in: William Shakespeare: Julius Caesar

Signatur des Originals: S 36/F03364

Adalbert Matkowsky als Marcus Antonius, Szenenfoto, Hüftbild, in: William Shakespeare: Julius Caesar

Signatur des Originals: S 36/F05362

Eleonora Duse als Cleopatra, Szenenfoto, in: William Shakespeare: Antonius und Cleopatra

Signatur des Originals: S 36/F08492

Ellie Langtry als Cleopatra, Rollenbild, Kniestück, in: William Shakespeare: Antonius und Cleopatra

Signatur des Originals: S 36/F09049

Ellie Langtry als Cleopatra, Rollenbild, Brustbild, in: William Shakespeare: Antonius und Cleopatra

Signatur des Originals: S 36/F09050

Hans Pokorny als Antonius, Rollenbild

Signatur des Originals: S 36/F09550