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BIOLOGIA MARINHA PDF

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Request PDF on ResearchGate | On Jul 31, , Renato Crespo Pereira and others published Biologia Marinha. PDF | On Jan 1, , M. BISCOITO and others published Divulgação Estação de Biologia Marinha do Funchal, At Funchal, Madeira, Setembro Lake Tanganyika Experience and Lessons Learned Brief Sven Erik Jorgensen*, Royal Danish University of Pharmaceutical Sciences, Copenhagen, Denmark.


Biologia Marinha Pdf

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Veja grátis o arquivo Biologia Marinha (Portugal).pdf enviado para a disciplina de Zoologia Categoria: Anotações - 37 - Veja grátis o arquivo Biologia Marinha (Portugal).pdf enviado para a disciplina de Zoologia Categoria: Anotações - 39 - Veja grátis o arquivo Biologia Marinha (Portugal).pdf enviado para a disciplina de Zoologia Categoria: Anotações - 27 -

In the last five decades it has been estimated that more than natural compounds were discovered from these organisms. The great majority of the published works have focused on terpenoids. In comparison, glycolipids are a neglected class of macroalgal secondary metabolites therefore remaining as a largely unknown reservoir of molecular diversity. Nevertheless, the interest regarding these compounds has been growing fast in the last decades as activities of ecological or pharmaceutical interest have been highlighted.

This paper will review recent work regarding isolation and structural characterization of glycolipids from seaweeds and their prospective biological activities. Such dedication has resulted in the discovery of more than 20, compounds from marine microorganisms, invertebrates, and macroalgae Hu et al. Many base for boating expeditions. Some of these plants are used by chimpanzees as medicine and appetizers.

Journal of Marine Biology

It is noted that Lake Tanganyika is a source of of the interesting places to be seen. Unfortunately, however, traditional attitudes and responses to land and water Table 1. It is bordered by four no longer sustainable because they cannot keep pace with the national parks or nature reserves, as follows: rapid increase in the human population density. Because prevention is much more increased erosion from farms causing more sediment transport cost effective than abatement, it is important to establish to the lake.

Its residence time is years, which 3. Many rivers enter the 3. As shown in Figure 1, major towns around the lake polluted.

Mpulungu Zambia and Kigoma Tanzania. The lake is estimated to impact than many other African lakes, including Lake Victoria. The However, the drainage basin population of 10 million is maximum depth is in the southern part of the lake, while growing very rapidly about 2. On a lake-wide basis, the lake is still not polluted; is in an oligotrophic state, and has not yet The four riparian countries that share the lake, in terms of suffered from eutrophication.

Table 2. Limited, but very sensitive, areas Bujumbura Bay in Burundi; Riparian countries Burundi, Congo, Tanzania Kigoma Bay in Tanzania , currently show evidence of and Zambia unfavorable water quality changes, due mainly to urban and Altitude surface m industrial runoff.

Biologia Marinha (Portugal).pdf

It is a high priority that these places remain unpolluted, since drinking water for more than , people Surface area 32, km2 in Bujumbura and 80, in Kigoma is withdrawn from the Volume 18, km3 lake. Average depth m Residence time years The primary production derived from chlorophyll estimates in Drainage area , km2 is on the order of 0.

The annual production of herbivorous Length of shoreline 1, km copepods secondary production is estimated to be 23 g C m-2 pH 8. Source: Adapted from Odada et al. Experience and Lessons Learned Brief The lake contains around endemic species out of the total between 1. This includes about These climatic changes seem to have caused an increase of species of cichlids.

The lake has 8 species of crab, 15 species of surface water temperature of 0. Although the lake has and 0. There on the catchability of Lates stappersii a visual predator in the are two main weather seasons. The wet season, usually north, and Clupeids abundance in the south Plisnier In the south of Lake Tanganyika, it has always been observed Heating of the lake takes place mainly during the beginning of that the dry and windy season was a period of increased this season i.

The dry season from May to August has dry in the south, resulting in a decrease in turbulence and wave weather and strong southern and southeastern winds. The lake amplitude for the whole lake, which would cause the lake to be loses heat by evaporation caused by strong winds. The cooling less dynamic Plisnier Clupeids distribution patterns also may have changed, probably due to a reduced migratory behavior.

Antiviral effect of the seaweed Osmundaria obtusiloba against the Zika virus

This distribution pattern, related to environmental conditions. Thermocline Climatic changes probably affect other aspects of the ecology depths at Bujumbura and Kigoma were m in the dry of the lake and its drainage area as well. According to Verburg season of , while the epilimnion in the south end was et al. Lewis The productivity of the lake is highly dependent on these hydrodynamic states and climatic conditions, 3.

As mentioned above, the monsoon wind from the southeast causes the accumulation of There have been a number of studies of the lake over the water in the epilimnion, thereby deepening the thermocline in last 15 years Odada et al.

These Plisnier and Coenen There is no oxygen in the Tanganyika by University of Arizona researchers; water below m Coulter et al. Over-exploitation of the biological resources because 3.

Untreated wastewater discharges, including industrial of very high fishing pressure and the use of destructive and domestic wastewater from large cities such as methods, reducing the fishery potential and the unique Bujumbura in Burundi, Kigoma in Tanzania, Uvira and biodiversity. These Tanganyika have shown an upward trend since s, waters might contain nutrients, organic matters, heavy standing today at about , tons.

Recent estimates metals mercury, chromium , pesticides, ash residues as per country indicate a yield of about 21, tons for cement, and fuel from ports, harbors, shipping places Burundi in These estimates translate into an average and Rusizi Rivers. Thus, the actual catches are much agrochemicals. Such industrialization. This the northern and southern parts of the lake, rather than progressive increase in population pressure this the actual lake productivity.

Juliana Oliveira

This means that, on a lake- steep, denuded slopes bordering the lake. La pollution des mers. Presses Universitaires de France, Paris: pp.

The biology of the Clupeoid fishes. Advances in Marine Biology, Ecologie du plancton marin. Tome I- Le phytoplancton. Masson et Cie.

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Tome II- Le zooplancton. In Lamotte, M. Ecology of sandy shores. Elsevier, Amsterdam: pp. Bergey's manual of determinative bacteriology. Williams and Wilkins, Baltimore: pp. Microstructure of fish otoliths.

Departamento de Oceanografia

Canadian Journal of Fisheries and Aquatic Sciences, Souverains oceanographes. A field atlas of the seashore.

Cambridge University Press, New York: pp. Upwelling and fish production. FAO Fish.

Paper, Science and the fisheries. Studies in biology no. Edward Arnold: 60pp.

Marine ecology and fisheries. Cambridge University Press, Cambridge: pp. Climate and fisheries. Academic Press, London: pp. Uova, larve e stadi giovanili di Teleostei. The marine and freshwater plankton. University Press Michigan, Michigan: pp.

DAY, J. Estuarine ecology with particular reference to southern Africa. Balkema, Roterdam: pp. General Oceanography: An introduction. The biology of sea snakes.

Fundamentals of Oceanography.Science, Invertebrate Systematics, 19 6 , — Records of the Australian Museum, 25, 1— Otolith microstructure and the detection of life history events in sardine and anchovy larvae. Coenen and O. Killifish Assoc.