With this study, experts of the lab observe these changes first hand thanks to a microchip. ‘We implant it in the dorsal muscle of the specimens we are analysing, which is like their id card, as gilthead breams have a peculiarity- they change sex as they grow. The change of sex from male to female can happen once they reach one and a half kilos of weight. With this system it is easy to know what fish we are checking. Once each specimen is identified, we weight and measure it in order to follow their development, as mature fish get very fat due to their gonads, but do not get very long during the laying period’, director of Plant of Marine Cultures Rosa Vázquez said.
In order to guarantee the well-being of the different species in this animal experimentation lab, fish are kept in such conditions so as to avoid stress. ‘These factors include the diminishing of the light intensity. In the specific case of breeding plants of gilthead breams, the fish of the facilities are kept in tanks of sea water with a light control system. Also, they are subject to a controlled photoperiod of 8 hours of daylight’, the lab’s head technician said.
In addition to following-up the changes of fish in captivity, the obtaining of eggs and larvae allows to carry out trials and larva culture practical in the lab.
A decade of research in Aquaculture
Apart from coordinating and managing the teaching and research activities of the University of Cadiz in the field of Aquaculture, the Plant of Marine Cultures breeds, supplies and experiments with marine species. Its function as a university lab does not exempt it from being a place where research projects are carried out.
Coordinated by Dr. María del Carmen Rendón, of the Department of Biology, and led by Rosa Vázquez (head technician since 1996), the team of experts is made up by Ana Álvarez Macías, Carmen María Álvarez Torres, Mariano García de Lara and Rosario Sánchez Maestre. However, the lab is also a place for training the future professionals of the aquaculture sector. This is why there are also two university scholarship holders, trainees at a company, and students doing practical work on aquaculture operations at the vocational training centre ‘Santi Petri’ of San Fernando, who are learning the latest techniques and novelties in this sector.
The team develops techniques for fish and mollusc breeding, larvae cultures of fish and molluscs, and phytoplankton and zooplankton cultures. ‘We produce biological material related to marine cultures, such as zooplankton (rotifers and artemiae), phytoplankton, with a camera of microalgae culture, as well as eggs and larvae. All these cultures are useful for teaching and research at the Faculty of Sea and Environmental Sciences’, Rosa Vázquez said.
Ismael Gaona | alfa
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The WHO reports an estimated 429,000 malaria deaths each year. The disease mostly affects tropical and subtropical regions and in particular the African continent. The Fraunhofer Institute for Silicate Research ISC teamed up with the Fraunhofer Institute for Molecular Biology and Applied Ecology IME and the Institute of Tropical Medicine at the University of Tübingen for a new test method to detect malaria parasites in blood. The idea of the research project “NanoFRET” is to develop a highly sensitive and reliable rapid diagnostic test so that patient treatment can begin as early as possible.
Malaria is caused by parasites transmitted by mosquito bite. The most dangerous form of malaria is malaria tropica. Left untreated, it is fatal in most cases....
The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.
Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...
Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.
That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...
Computer Tomography (CT) is a standard procedure in hospitals, but so far, the technology has not been suitable for imaging extremely small objects. In PNAS, a team from the Technical University of Munich (TUM) describes a Nano-CT device that creates three-dimensional x-ray images at resolutions up to 100 nanometers. The first test application: Together with colleagues from the University of Kassel and Helmholtz-Zentrum Geesthacht the researchers analyzed the locomotory system of a velvet worm.
During a CT analysis, the object under investigation is x-rayed and a detector measures the respective amount of radiation absorbed from various angles....
The quantum world is fragile; error correction codes are needed to protect the information stored in a quantum object from the deteriorating effects of noise. Quantum physicists in Innsbruck have developed a protocol to pass quantum information between differently encoded building blocks of a future quantum computer, such as processors and memories. Scientists may use this protocol in the future to build a data bus for quantum computers. The researchers have published their work in the journal Nature Communications.
Future quantum computers will be able to solve problems where conventional computers fail today. We are still far away from any large-scale implementation,...
15.11.2017 | Event News
15.11.2017 | Event News
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21.11.2017 | Physics and Astronomy
21.11.2017 | Physics and Astronomy
21.11.2017 | Life Sciences