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Sardinha
Como hoje é o dia dela, aqui ficam alguns dados sobre o petisco mais famoso de Lisboa.
SARDINHA
Sardina pilchardus
Habitat: Atlântico nordeste: Desde o Mar do Norte até ao Mar Mediterrâneo e ao Senegal.
Nível de conservação (Estatuto IUCN): Pouco preocupante
BIOLOGIA
A sardinha tem o corpo alongado, azul ou verde no dorso e prateado no ventre. Esta espécie forma grandes cardumes que se alimentam de plâncton, como pequenos crustáceos, microalgas e ovos de peixes. Durante o verão e até meados do outono acumula gordura, o que lhe permite ter energia para se conseguir reproduzir nos meses seguintes.
CONSERVAÇÃO
Sendo uma das principais pescarias em Portugal, existe um plano de gestão para a pesca da sardinha. Este inclui um limite de 180 dias de pesca por ano, por embarcação, períodos de interdição de captura e limites à pesca de juvenis. Esta espécie tem um tamanho mínimo legal de captura de 11 centímetros.
CURIOSIDADES
Durante o verão esta espécie é mais abundante na costa portuguesa devido a um fenómeno conhecido como afloramento costeiro ou upwelling. A água da superfície é afastada pela ação do vento, permitindo a subida de águas mais profundas, frias e ricas em plâncton.
In Oceanário de Lisboa
https://www.oceanario.pt/exposicoes/exposicao-permanente/peixes/sardinha
Plásticos no oceano
Baby exoplanet
Exoplaneta bebé!
FEATURE: Baby exoplanet
PDS-70b Forming ESO/R. Dong et al.; ALMA (ESO/NAOJ/NRAO)
It’s a Beautiful Baby Exoplanet! Historic Photo Is 1st View of Alien World Being Born
A stunning, first-of-its-kind photo shows a huge, newfound alien world taking shape in the disk of gas and dust surrounding a young star.
The image is the first confirmed direct observation of such a young exoplanet, discovery team members said.
“These disks around young stars are the birthplaces of planets, but so far only a handful of observations have detected hints of baby planets in them,” discovery leader Miriam Keppler, of the Max Planck Institute for Astronomy in Heidelberg, Germany, said in a statement. “The problem is that, until now, most of these planet candidates could just have been features in the disk.”
Keppler and her colleagues analyzed new and archival observations of a young dwarf star called PDS 70, which is about 5.4 million years…
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CIMON, the cyber colleague of Alexander Gerst
CIMON, o robô
FEATURE: CIMON, the cyber colleague for Alexander Gerst
Alexander Gerst meets CIMON ©DLR
CIMON – a ‘cyber colleague’ for Alexander Gerst
A new ‘cyber colleague’ is on its way to the International Space Station (ISS) to join German ESA astronaut Alexander Gerst. CIMON and six other experiments for the ‘horizons’ mission lifted off from Cape Canaveral Air Force Station in Florida on Friday, 29 June 2018 at 11:42 CEST (05:42 local time) on board a US Dragon capsule with a Falcon 9 launcher. In addition to the astronaut assistance system, a new Earth observation instrument, experiments for cell and materials research and two student experiments will reach the ISS on 2 July.
CIMON – a new ‘cyber colleague’ on the ISS
Alexander Gerst and the rest of the crew on the ISS will soon welcome a new colleague. The Crew InteractiveMObile companioN (CIMON) is an innovative assistance system for astronauts, which is equipped with artificial intelligence…
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Mars
via Mars
Mysterious Methane on Mars
FEATURE: Mysterious Methane on Mars
NASA Finds Ancient Organic Material, Mysterious Methane on Mars
NASA’s Curiosity rover has found new evidence preserved in rocks on Mars that suggests the planet could have supported ancient life, as well as new evidence in the Martian atmosphere that relates to the search for current life on the Red Planet. While not necessarily evidence of life itself, these findings are a good sign for future missions exploring the planet’s surface and subsurface.
The new findings – “tough” organic molecules in three-billion-year-old sedimentary rocks near the surface, as well as seasonal variations in the levels of methane in the atmosphere – appear in the June 8 edition of the journal Science.
Organic molecules contain carbon and hydrogen, and also may include oxygen, nitrogen and other elements. While commonly associated with life, organic molecules also can be created by non-biological processes and are not necessarily indicators of…
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