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
New 3-D model predicts best planting practices for farmers
26.06.2017 | Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign
Fighting a destructive crop disease with mathematics
21.06.2017 | University of Cambridge
Physicists working with researcher Oriol Romero-Isart devised a new simple scheme to theoretically generate arbitrarily short and focused electromagnetic fields. This new tool could be used for precise sensing and in microscopy.
Microwaves, heat radiation, light and X-radiation are examples for electromagnetic waves. Many applications require to focus the electromagnetic fields to...
Strong light-matter coupling in these semiconducting tubes may hold the key to electrically pumped lasers
Light-matter quasi-particles can be generated electrically in semiconducting carbon nanotubes. Material scientists and physicists from Heidelberg University...
Fraunhofer IPA has developed a proximity sensor made from silicone and carbon nanotubes (CNT) which detects objects and determines their position. The materials and printing process used mean that the sensor is extremely flexible, economical and can be used for large surfaces. Industry and research partners can use and further develop this innovation straight away.
At first glance, the proximity sensor appears to be nothing special: a thin, elastic layer of silicone onto which black square surfaces are printed, but these...
3-D shape acquisition using water displacement as the shape sensor for the reconstruction of complex objects
A global team of computer scientists and engineers have developed an innovative technique that more completely reconstructs challenging 3D objects. An ancient...
Physicists have developed a new technique that uses electrical voltages to control the electron spin on a chip. The newly-developed method provides protection from spin decay, meaning that the contained information can be maintained and transmitted over comparatively large distances, as has been demonstrated by a team from the University of Basel’s Department of Physics and the Swiss Nanoscience Institute. The results have been published in Physical Review X.
For several years, researchers have been trying to use the spin of an electron to store and transmit information. The spin of each electron is always coupled...
26.07.2017 | Event News
21.07.2017 | Event News
19.07.2017 | Event News
27.07.2017 | Life Sciences
27.07.2017 | Life Sciences
27.07.2017 | Health and Medicine