ULTIMO AGGIORNAMENTO BANCA DATI: 13/09/2024 13:00:57
Archaeological research is radically transforming the view that the Amazon basin and surrounding areas witnessed limited societal development before European contact. Nevertheless, uncertainty remains on the nature of the subsistence systems and the role that aquatic resources, terrestrial mammalian ...
The North Pacific Marine Salmon Diet Database is an open-access relational database built to centralize and make accessible salmon diet data through a standardized database structure. The initial data contribution contains 21,862 observations of salmon diet, and associated salmon biological parameters, ...
Food web dynamics outline the ecosystem processes that regulate community structure. Challenges in the approaches used to capture topological descriptions of food webs arise due to the difficulties in collecting extensive empirical data with temporal and spatial variations in community structure and ...
Wildlife research by citizen scientists, involving the capture and handling of animals, provides clear scientific benefits, but also potential risks to animal welfare. We explore debates about how best to regulate such work to ensure that it is undertaken in an ethical manner. We focus on the UK as ...
In large seaports, ship traffic safety is provided by vessel traffic services (VTS). In Primorye the safety of navigation is provided by the VTS of Peter the Great Gulf. It functions in order to improve the efficiency of shipping and safety of life at sea, including on the water areas of seaports: Vladivostok, ...
Several Vibrio spp. cause acute and severe mortality events in hatcheries where larvae of bivalve mollusks are reared, potentially leading to subsequent shortage of bivalve seed for the grow-out industry. In particular, strains of Vibrio coralliilyticus have been identified as a major cause of disease ...
Vitellogenesis in crustaceans is an energy-consuming process. Though the underlying mechanisms of ovarian maturation in decapod Crustacea are still unclear, evidence indicates the process to be regulated by antagonistically-acting inhibitory and stimulating factors specifically originating from X-organ/sinus ...
Water quality monitoring, assessment, and analysis in an aquaponics system are vital procedures in maintaining a productive and an efficient ecosystem for cultivars being cultured. However, these require labor-intensive, long-standing, and high-priced laboratory methods, as water quality and its nutrients ...
With increasing offshore-related commerce, the choice of appropriate operations and maintenance activities must take into consideration safety, costs and performance targets. Stochastic weather conditions at each site of interest presents uncertain situations. We present an optimized decision-making ...
With the increasingly extensive use of diver and unmanned underwater vehicle in military, it has posed a serious threat to the security of the national coastal area. In order to prevent the underwater diver's impact on the safety of water area, it is of great significance to identify underwater small ...
There are situations in which divers need to find their way to an unknown location within acoustic communication range as quickly as possible without broadcasting additional energy besides that of already transmitted acoustic communication signals, e.g., for acoustic covertness or saving battery life. ...
In the maritime environment, proper diver-robot communication is a bottleneck to enable collaborative work underwater. Many applications like companion or safety robots require a robust system to communicate underwater. In this paper, we propose a four-step vision-based underwater hand gesture recognition ...
Diving operations are still predominant today in many underwater applications despite the advances in robot-assisted technologies. Apart from being invaluable in carrying out many complex tasks underwater, diving is also a popular form of recreational activity. To improve diver safety and enable new ...
Divers have a variety of tasks typically with high complexity and high risk. Autonomous underwater vehicles (AUVs) can improve the efficiency and safety of divers by assisting divers in performing underwater operations. A dive-buddy AUV should have the ability to follow a diver and interact with a diver. ...
As coral populations decline across the Caribbean, it is becoming increasingly important to understand the forces that inhibit coral survivorship and recovery. Predation by corallivores, such as the short coral snail Coralliophila abbreviata, are one such threat to coral health and recovery worldwide, ...
The Azores archipelago, lying on the North Atlantic (NA) ocean, hosts one of the greatest diversities of cetaceans, and is an important habitat for several resident and migratory species. However, this unique diversity may be at risk due to the ocean noise generated by increasing commercial and recreational ...
Vessel Monitoring System (VMS), based on China Beidou Satellite System, provides a high time resolution of 3 minutes for all trawlers in the East China Sea. However, the data loss is still a common phenomenon, hindering the research on spatial and temporal patterns of fishing activities. Most existing ...
In recent years, Unmanned Maritime Systems (UMS) have become widely used in hydrographic surveys and oceanographic studies, especially in coastal regions. NOAA's National Centers for Environmental Information (NCEI) has received an increased amount of data collected by UMS in the past 10 years. A variety ...
Video monitoring of the marine environment is an important tool for understanding variations in underwater habitats due to climate change. Deployment of underwater video systems incurs in fixed costs that impact in the number of samples gathered. This paper presents the version 4.0 of the POTBot (Pictures ...
Low-bandwidth communication, such as underwater acoustic communication, is limited by best-case data rates of 30–50 kbit/s. This renders such channels unusable or inefficient at best for single image, video, or other bandwidth-demanding sensor-data transmission. To combat data-transmission bottlenecks, ...