Características hematológicas de teleósteos brasileiros: IV. Variáveis do jundiá Rhamdia quelen ( Pimelodidae)

As características hematológicas do jundiá Rhamdia quelen Quoy & Gaimard, 1824 (Osteichthyes: Pimelodidae), oriundo de cativeiro foram estudadas. Determinou-se o valor médio da contagem de eritrócitos, taxa de hemoglobina, hematócrito, volume corpuscular médio (VCM), concentração de hemoglobina corpuscular média (CHCM) e distribuição percentual de células sangüíneas de defesa orgânica. As células sangüíneas de defesa orgânica (leucócitos e trombócitos) foram identificadas e caracterizadas morfologicamente. Trombócitos e linfócitos foram as células sangüíneas de defesa orgânica mais freqüente nas extensões sangüíneas do R. quelen. A análise de regressão mostrou correlação linear negativa entre o percentual de trombócitos e linfócitos. Os resultados deste estudo fornecem valores sangüíneos normais em R. quelen, em cultivo intensivo, que poderão servir de comparação com dados dessa espécie em outras situações de cultivo.

Caracterização da piscicultura na região do Vale do Ribeira - SP

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

Feeding ecology of the Brazilian silverside Atherinella brasiliensis (Atherinopsidae) in a sub-tropical estuarine ecosystem

The feeding ecology of the Brazilian silverside, Atherinella brasiliensis, in a sub-tropical estuary of Brazil was investigated through the gut analysis of 1431 individuals. We described dietary composition and analysed seasonal, estuarine habitat, and body size variations in the diet; trophic level; feeding diversity; and gut fullness indices. Results reveal that A. brasiliensis is a typical, generalistic and opportunistic predator that makes use of a wide array of prey types (at least 89 different types), with zooplankton (mainly calanoids), diatoms, terrestrial insects, and plant detritus making up the bulk of the overall diet. The exotic calanoid Temora turbinata ranked as the primary prey. A wide feeding diversity (mean H` = 2.26), low trophic level (mean TROPH = 2.57), and high gut replenishment were persistent across seasons and habitats. Diet composition varied largely and significantly with respect to habitat, season, and body size. A closer assessment showed that habitat and season had a stronger effect on diet than fish size.

Voyage de decouvertes de l'Astrolabe exécutée par order du roi pendant les années 1826-1827-1828-1829, sous le commandement de M. J. Dumont d'Urville.

Mode of access: Internet.

La fin du mois : comédie-vaudeville, en un acte ;

Mode of access: Internet.

Voyage de découvertes de l'Astrolabe exécuté par ordre du Roi, pendant les années 1826-1827-1828-1829, sous le commandement de M.J. Dumont d'Urville.

Binder's title: Voyage de l'Astrolabe.

Jocko; ou, Le singe du Brésil; drame en deux actes, à grand spectacle, mêlée de musique, de danses et de pantomime.

In collaboration with Merle. - cf. Quérard.

Cartouche; mélodrame en trois actes,

Without music.

La tête de mort; ou, Les ruines de Pompeïa. Mélodrame en trois actes;

Without music, tunes indicated by title.

Le pâtre; mélodrame en deux actes.

Mode of access: Internet.

Bertram, ou Le pirate; mélodrame en trois actes.

Imitation of C.R. Maturin's Bertram.

Voyage d'Italie curieux et nouveau : enrichi de deux listes, l'une de tous les curieux, & de toutes les principales curiositez de Rome, & l'autre de la pluspart des sçavans, curieux, & ouvriers excellens de toute d'Italie à present vivans.

"Cet ouvrage a esté fait par Monsieur Huguetan de Lyon, fameux avocat en Parlement ... quoy qu'il y eût pris beaucoup de peine, neanmoins Monsieur Spon docteur en medecine, aggregé au College de Lyon ..."--P. [3].

The fate of Lyngbya majuscula toxins in three potential consumers

Blooms of Lyngbya majuscula have been reported with increasing frequency and severity in the last decade in Moreton Bay, Australia. A number of grazers have been observed feeding upon this toxic cyanobacterium. Differences in sequestration of toxic compounds from L. majuscula were investigated in two anaspideans, Stylocheilus striatus, Bursatella leachii, and the cephalaspidean Diniatys dentifer. Species fed a monospecific diet of L. majuscula had different toxin distribution in their tissues and excretions. A high concentration of lyngbyatoxin-a was observed in the body of S. striatus (3.94 mg/kg(-1)) compared to bodily secretions (ink 0.12 mg/kg- 1; fecal matter 0.56 mg/kg(-1); eggs 0.05 mg/kg(-1)). In contrast, B. leachii secreted greater concentrations of lyngbyatoxin-a (ink 5.41 mg/kg(-1); fecal matter 6.71 mg/kg(-1)) than that stored in the body (2.24 mg/kg(-1)). The major internal repository of lyngbyatoxin-a and debromoaplysiatoxin was the digestive gland for both S. striatus (6.31 +/- 0.31 mg/kg(-1)) and B. leachii (156.39 +/- 46.92 mg/kg(-1)). D. dentifer showed high variability in the distribution of sequestered compounds. Lyngbyatoxin-a was detected in the digestive gland (3.56 +/- 3.56 mg/kg(-1)) but not in the head and foot, while debromoaplysiatoxin was detected in the head and foot (133.73 +/- 129.82 mg/kg(-1)) but not in the digestive gland. The concentrations of sequestered secondary metabolites in these animals did not correspond to the concentrations found in L. majuscula used as food for these experiments, suggesting it may have been from previous dietary exposure. Trophic transfer of debromoaplysiatoxin from L. majuscula into S. striatus is well established; however, a lack of knowledge exists for other grazers. The high levels of secondary metabolites observed in both the anaspidean and the cephalapsidean species suggest that these toxins may bioaccumulate through marine food chains.

Difusión teatral del transformismo: El caso de "Les deux Jockos", 1825

Durante el siglo XIX el transformismo irrumpe en el panorama científico, una irrupción cuyas implicaciones filosóficas y sociales se traducen, entre otros, en obras teatrales en las que la temática refleja la difusión de estas nuevas ideas. Les deux Jockos, de 1825, ejemplifica ese grupo de representaciones que ponen en escena el debate transformista en una sociedad todavía dominada por los preceptos fijistas defendidos desde las instituciones y las élites sociales de la época. Así pues, el análisis de la obra permitirá desvelar aquellos elementos relacionados con el nuevo paradigma de naturaleza propuesto, al tiempo que evidencia la capacidad de influencia de la realidad histórica, social y cultural sobre el género teatral.