13 documents found, page 1 of 2

Citogenotoxic response of juvenile cobia Rachycentron canadum (Linnaeus, 1766) ...

Made available in DSpace on 2019-09-12T16:25:58Z (GMT). No. of bitstreams: 0 Previous issue date: 2018; Resumo A produção da aquicultura vem crescendo em todo o mundo e o cultivo de peixes marinhos no Brasil é ainda muito recente. Condições intensivas de aquicultura podem causar estresse fisiológico ao organismo do cultivo, o que pode ser avaliado por biomarcadores citogenotóxicos. O objetivo desse estudo foi a...

Citogenotoxic response of juvenile cobia Rachycentron canadum (Linnaeus, 1766) ...

Effects of naphthalene on metabolic rate and ammonia excretion of juvenile Flor...

Routine metabolism and ammonia excretion of the Antarctic amphipod Waldeckia ob...

Mean and specific oxygen consumption and ammonia excretion were measured at 0ºC and 3ºC, in the Antarctic amphipod Waldeckia obesa collected in Admiralty Bay, King George Island, Antarctica. Experiments were carried out at the Brazilian Antarctic Station "Comandante Ferraz" and at the Laboratory of Polar Ecology of the Oceanographic Institute of São Paulo University. Individuals ranging from 120 mg to 620 mg an...

Karyotypes of three species of marine catfishes from Brazil

Os cromossomos de 3 espécies de peixes da família Ariidae - Netuma barba, Genidens genidens e Arius parkeri - foram estudados após coloração convencional com Giemsa. As três espécies apresentaram número modal diplóide de 2n = 56. O cariótipo de N. barba compreende 18 pares de cromossomos metacentricos (m), 18 submetacêntricos (sm), 18 subtelocêntricos (st) e 2 telocêntricos (t); o de G. genidens compreende 12 p...

Avaliação prévia da toxicidade de um efluente simulado derivado de petróleo sob...

Preliminary experiments were carried out to estimate the potential toxicity of an effluent derived from petroleum to be dumped into São Sebastião channel through a submarine emissary which is being built at the Maritime Terminal "Almirante Barroso" (TEBAR). Two simulated samples of this effluent (denominated A and B) were supplied by PETROBRÁS. The toxicity of sample A was tested with young and adult Promysis a...

Electrophoretic study on population structure of krill, Euphausia superba Dana,...

Samples of Antarctic krill, Euphausia superba, collected from 18 locations in the Drake Passage, Bransfield Strait and on the west coast of the Antarctic Peninsula were analyzed for protein variation using enzyme electrophoresis. Of 19 enzyme loci studied, 14 (73,6%) exhibit allelic variations. Average heterozigosity for a station varies from 0,129 to 0,157. Five loci are with null alleles. Differences in allel...

The karyotype of Cathorops sp, a marine catfish from Brazil

Cathorops sp has the diploid number of 54 chromosomes. The karyotype comprises lm + sm, 6m, 6sm and 14st pairs. This result is compared with those of other species of Ariidae, mainly Ariopsis felis and Arius dussumieri, found in literature.; Foram realizados estudos cromossômicos em 25 espécimens de Cathorops sp pelo método de air-drying. O número modal diplóide encontrado foi de 54 cromossomos sendo 1 par m + ...

Nota sobre o transporte de krill (euphausia superba Dana) vivo da antártica par...

In this note an experiment on transportation of alive krill from the Antarctica to Brazil during the V Brazilian Expedition to the Antarcticas austral summer 1986-198?3 was reported. The aquarium system and the krill mortality in function of time and other events dur-lng the experiment were described. The importance of this experiment for the development of experimental studies of krill was discussed.; É aprese...

Micropogonias furnieri (Desmarest, 1823) quali-quantitative studies on ontogene...

In population studies based on genetic-biochemical markers, variations induced by ontogenetic development, sex and gonad maturation act as a potencial source of bias. These aspects were analysed for patterns of eye-lens proteins of Micropogonias furnieri (Sciaenidae), following electrophoregrams obtained from 546 specimens ranging from 98 and 710 mm in length, collected along the southeastern Brazilian coast (2...