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ULTIMO AGGIORNAMENTO BANCA DATI: 13/09/2024 13:00:57

Stable isotope evidence for dietary diversification in the pre-Columbian Amazon

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 ...

A salmon diet database for the North Pacific Ocean

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, ...

Identifying patterns in the multitrophic community and food-web structure of a low-turbidity temperate estuarine bay

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 ...

Getting to grips with wildlife research by citizen scientists: What role for regulation?

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 ...

Application of Wireless Broadband Technology to Build Communication Channel in the Vessel Traffic Service of Peter the Great Gulf

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, ...

Contrasting Immunomodulatory Effects of Probiotic and Pathogenic Bacteria on Eastern Oyster, Crassostrea Virginica, Larvae

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 ...

Insights on Molecular Mechanisms of Ovarian Development in Decapod Crustacea: Focus on Vitellogenesis-Stimulating Factors and Pathways

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 ...

Adaptive Neuro-Fuzzy Inference System on Aquaphotomics Development for Aquaponic Water Nutrient Assessments and Analyses

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 ...

Operations and Maintenance for Multipurpose Offshore Platforms using Statistical Weather Window Analysis

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 ...

Underwater Small Target Recognition Based on Convolutional Neural Network

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 ...

Acoustic ranging with communication signals for wireless diver guidance to base

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. ...

Development of an underwater hand gesture recognition system

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 ...

Diver Communication and Localization System using Underwater Acoustics

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 ...

Development of a Monocular Vision Deep Learning-based AUV Diver-Following Control System

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. ...

Relationships between a common Caribbean corallivorous snail and protected area status, coral cover, and predator abundance

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, ...

Shipping noise predictions from AIS in the Faial-Pico area, Azores archipelago

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 ...

Trawler Fishing Track Interpolation using LSTM for Satellite-based VMS Traces

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 ...

Incorporating Discrete Unmanned Maritime System Data Collections Into NCEI Synthesized Data Products

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 ...

Underwater Automated Camera ‘Potbot’ for Marine Habitat Monitoring in Fishing

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 ...

Single Image Super-Resolution for Domain-Specific Ultra-Low Bandwidth Image Transmission

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, ...

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