ULTIMO AGGIORNAMENTO BANCA DATI: 13/09/2024 13:00:57
Autonomous underwater vehicles (AUV) traverse considerable distances underwater without any intervention. Very often the operations are in coastal waters with small depth, large horizontal distances, seabed obstacles, fishing activities and surface traffic. This necessitates monitoring the AUV status ...
The paper briefly presents the technical and operational details of a series of new sensors and related instrumentation developed by the author and implemented throughout the country to meet the challenging needs of oceanographic investigations taken up by different institutions. Development of sensors ...
Glass housings have been used since antiquity. Glass was the fabled hull material of choice for Alexander the Great's descent into the Mediterranean Sea in 332BC. Fishermen around the world have used glass fishing floats to support their nets since at least 1840, beginning in Scandinavia. Today, glass ...
Mud Banks of Kerala are areas of the sea adjoining the coast that have a special property of dampening the waves and creating clearly demarcated areas of calm water during the roughest monsoon conditions of the sea. It is believed that these areas have a muddy bottom and suspended muddy sediments in ...
The robotics world has reached a stage where the Remotely Operated Vehicle (ROV) industry is very well established with thousands upon thousands of ROVs having been created and deployed since the dawn of this industry. The need for autonomy in robots and vehicles, however, is becoming more and more ...
Aim: Sugarcane press residue (SPR), a by-product of sugarcane industry, which is rich in inorganic salts was assessed at different levels in both soya based and fish based diets of layers for egg shell and yolk quality characteristics. Materials and Methods: SPR was incorporated in 32-week-old white ...
Bioavailability and hence bioaccumulation of heavy metals in fish species depends on seasonal conditions causing different risks levels to human health during the lifetime. Mercury, cadmium and lead contents in fish from Chihuahua (Mexico) water reservoirs have been investigated to assess contamination ...
Geographic distance, different living habitats or Pleistocene climatic oscillations have frequently been found to shape population genetic structure in many species. The genetic structure of Schizothorax nukiangensis, a high altitude, valuable fish species, which is distributed throughout the Nujiang ...
Background Thrombocytopenia can result from a wide range of conditions and may be determined by multiple mechanisms. It can be due to a reduced platelet production or an increased destruction of platelets. Increased destruction is seen in conditions such as disseminated intravascular coagulation (DIC) ...
Ocean acidification (OA) is widely recognized as a significant oceanic threat in connection with other oceanic stressors, including warming and deoxygenation. Recent work shows that ocean acidification will negatively affect calcification processes for many species, including reef-building corals. It ...
Hydrodynamic response of a moored surface buoy has been experimentally evaluated in the present study. This buoy has been designed by National Institute of Ocean Technology (NIOT) to suit the functional requirements. A Froude scale model has been adopted and the floating body characteristics such as ...
Encounters between Scandinavian brown bears (Ursus arctos) and humans that result in human injuries and fatalities typically coincide with den entry in October and November, and commonly occur near a den. Our aim was to determine when bears arrive at their dens, identify potential predictors of this ...
Freshwater cetaceans are among the data deficient and now recognized as the most threatened group of marine mammals. Large scale studies are required to be done on an urgent basis to ensure reasonable chance of survival for these species. A detailed analysis of the freshwater habitats globally, indicate ...
The difference between maximum metabolic rate and standard metabolic rate is referred to as aerobic scope, and because it constrains performance it is suggested to constitute a key limiting process prescribing how fish may cope with or adapt to climate warming. We use an evolutionary bioenergetics model ...
The culture of fish in cages has become a practical and successful method in oceans to get good yield in fish production without going to deep sea. Our system contains a fish cage and an electronic system which makes the cage system submerge to a desired depth to protect fish during adverse weather ...
Aim: This study was designed to describe a series of in vitro tests that may aid the discovery of probiotic strains from actinomycetes. Materials and Methods: Actinomycetes were isolated from marine sediments using four different isolation media, followed by antimicrobial activity and toxicity assessment ...
This study investigated the perceptions on and adaptations to climate change impacts of 235 pangasius farmers in the Mekong Delta, Vietnam. Data were collected using semi-structured household surveys in six provinces, from three regions along the Mekong river branches. A Chi-Square test was used to ...
Different types of submersible dredgers are conceived, modeled and even some prototype and full-scale vehicles are built for prospective subsea excavation purposes by various researchers and commercial companies. Most common type of submersible dredgers is tracked vehicle. Walking submersible dredgers ...