996 resultados para Polglase, Loveday, 1804-1822.


Relevância:

20.00% 20.00%

Publicador:

Resumo:

This paper deals with the morphology of Pomacea caniculata (Lamarck, 1822) collected at Corrientes, Argentina. Comparison is made with Pomacea lineata (Spix, 1827) and Pomacea sordida (Swainson, 1823). The shell is globose, heavy, with greenish or horn-colored periostracum and dark spiral bands; apex subelevated, 5-6 whorls increasing rather rapidly and separated by very deep suture. Aperture large, rounded to subelongated; lip sometimes reddish; umbilicus large and deep; operculum corneous, entirely closing the aperture. Ratios: shell width/shell length = 0.78-0.96 (mean 0.86); aperture length/shell length = 0.68-0.77 (mean 0.72). Radula similar to other congeneric species. Testis and spermiduct as in P. lineata and P. sordida; prostate cylindric and short, cream in color as the testis. Penial sheath straight bearing a central outer gland deeply embedded in the tissue of its basal portion and a large wrinkled gland occupying 2/3 of the distal tip of its inner surface; the rigth margin of the sheath overlaps the left one until 2/3 of its proximal end. Female reproductive apparatus similar to that P. lineata; vestigial male copulatory apparatus (penis and its sheath) present in all females examined.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Some aspects of torpor have been studied among captive Suncus etruscus by recording the nest temperature. Torpors show a circadian pattern and occur spontaneously or can be induced by food shortage. Body temperature can be controlled during torpor, remaining relatively high at low ambiant temperatures. At 20° C, spontaneous torpors seem to be less deep than induced tropors, but both show similar patterns at 5-8 ° C. Spontaneous torpors begin between 01°° and 06°°, whereas the onset of diet induced torpors seems to depend also on food exhausting. The rates of activity (A) and of torpor (T) show under constant conditions a daily variability. Increase of T is linked with a decrease of A and the relationship could agree with A(%) = Ao( 1-T/100), where Ao is daily rate of activity when T = 0. Occurence of torpor among other Soricidae, possible occurence among free living Suncus etruscus and energy saving are discussed

Relevância:

20.00% 20.00%

Publicador:

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Este trabalho tem como principal objetivo fazer uma reflexão sobre três revoltas dos rendeiros na ilha de Santiago em Cabo Verde, entre os anos de 1822 a 1910. Propõe mostrar a especificidade das revoltas dos Engenhos (1822), de Achada Falcão (1841) e de Ribeirão Manuel (1910), compreendendo além do panorama cultural, a importância das confrontações políticas, como elementos condicionadores dessas revoltas. Por outro lado, propõe demonstrar que além das causas econômicas e culturais apontadas pela historiografia, as revoltas foram buscar sua inspiração nas disputas políticas. Propõe ainda demonstrar como as elites políticas locais apropriaram das festas religiosas para mobilizar os rendeiros do interior da ilha de Santiago. Além disso, analisa como as revoltas dos rendeiros devem ser compreendidas a partir das reivindicações pelo livre acesso às terras cultivadas.