14 résultats pour "krill"

• krill.

• krill.

• Krill

• Krill - ciencias de la naturaleza.

• Krill - ciencias de la naturaleza.

• Krill: Cette minuscule crevette nourrit les baleines géantes.

• Blue Whale - biology.

  Mature females may give birth once every two or three years. The gestation period lasts about 11 months. A single young is usually born the following spring; twins arerare. The females migrate to warm regions to give birth. The young nurse for seven or eight months, gaining as much as 90 kg (200 lb) per day. VII CONSERVATION STATUS Blue whales were not targeted by the whaling industry until the late 1800s after faster steam-powered ships were developed. The peak slaughter of blue whalesoccurre...

• Antarktis - geographie.

  Anpassungsmechanismen gehören eine gut entwickelte Schwimmfähigkeit durch eine dicke Fettschicht oder ein wasserundurchlässiges Gefieder. Beides dient auch demSchutz des Körpers vor Kälte. Sehr reichhaltig ist das Leben in den Meeren. Wale, die sich hauptsächlich von Krill ernähren, sechs Arten von Robben und etwa zwölfVogelarten leben und brüten in der Antarktis. Der bekannteste Bewohner der Antarktis ist der Pinguin. Als flugunfähiger Vogel lebt er auf dem Packeis und in den Meeren,die die Ant...

• Seal (mammal) - biology.

  remote lakes by swimming thousands of kilometers up rivers from the Arctic Ocean. A few other species such as ringed seals and harbor seals have been found livingyear-round in lakes and rivers near the coasts of Russia, Canada, and Alaska. IV DIET OF SEALS Most seals eat fish and sometimes squid. The leopard seal, an Antarctic species, may have the most diverse diet of all, commonly hunting penguins and other seabirds,smaller seals, as well as fish, squid, krill (small shrimplike crustaceans),...

• L'océan Austral

  urunt•~ En 11e11u cie ce tnilf sial1é en 1959 par 46 JN'/'5 etlllis 1!11 œwre en 1961, -- pirlit du COIIIinent n'est SOWIIR à lA _.iineté d'un ~tal En car, 1111115 les IN'I5 concernés renoncent à lew5 re:en Jli r*"s lenitoriales sur r~ De pil6. ce coMReAt ne doiiPM œ-ir 1e IWtft ri renjeu cie clilltftllll5 ~Toute actMté cie llilure mililiirt y est interdite . Le trailé éUblit les poliliques et les pnxécb-es concerllilll rulilisalion du COAiinent...

• Antarctica - Geography.

  The maximum area of sea ice surrounding Antarctica each winter varies from year to year. A marked decline during the 1970s appears to have reversed in more recentdecades, except in the Antarctic Peninsula area. This area has lost almost 40 percent of its sea ice since the start of the 1980s. Sea ice is important to marine life. Krillfeed on algae that live under the sea ice and are released when the ice melts in spring and summer. In turn, many marine animals feed on krill. Emperor penguinsbreed...

• Antarctique.

  limitée à environ trois cent cinquante espèces, pour la plupart des lichens, des mousses et des algues. Il existe des étendues luxuriantes de ces végétaux dans la péninsuleantarctique et on a découvert des lichens poussant sur des montagnes isolées à 380 km du pôle Sud. Il existe également trois espèces de plantes à fleurs dans la péninsuleantarctique. 2.6 Faune Il n'existe aucun vertébré terrestre en Antarctique. Les invertébrés, en particulier les mites et les tiques, qui supportent les basse...

• Crustáceos - ciencias de la naturaleza.

  El cefalotórax suele tener apéndices, que se emplean en la locomoción y la respiración. El caparazón sirve a menudo como cubierta protectora de las branquias, que formanparte de las extremidades. Algunas extremidades pueden formar pinzas (quelas). Los apéndices abdominales pueden usarse para la locomoción, pero con frecuenciadesempeñan otras funciones, como la respiración, y tienden a tener un tamaño reducido. El telson, una parte de la cola en la que va el ano, se usa en algunas ocasionespara l...

• Whale - biology.

  III BEHAVIOR OF WHALES Studies of whales in captivity have taught scientists much about the complex social behavior of whales. Since the late 1980s, advances in the use of satellite trackingsystems have also broadened opportunities for scientists to observe how whales behave in the wild. A Swimming and Diving Whales swim by making powerful up-and-down movements of the tail flukes, which provide thrust. The power comes from body muscles that flex the lower spine upand down in a wavelike motion...