ULTIMO AGGIORNAMENTO BANCA DATI: 13/09/2024 13:00:57
In this paper, we present a non-invasive method of counting fish in their natural habitat using automated analysis of video data. Our approach uses three modular components to preprocess, detect, and track the fish. The preprocessing reduces noise present in the image while enhancing the fish using ...
A remote fish finder system for effective set-net fishery, which enable to visualize as well as recognize catch amount and the fish kind, is proposed in this paper. In order to improve fishing efficiency and obtain the highest possible profit of set-net fishery, set-net monitoring is needed by coastal ...
This study was carried out to investigate the genetic diversity and population structure of 90 specimens of Oxynoemacheilus argyrogramma collected from Sepidbarg, Gamasiab and Ghaleji rivers, in the west of Iran. Analyses using three microsatellite loci indicated that the average number of alleles in ...
Bream (Abramis brama orientalis) is one of the most commercially valuable fish in the Caspian Sea. The aim of this study was to compare levels of genetic polymorphism between wild and farmed Bream populations using seven microsatellite loci. Genetic diversity was investigated by studying samples collected ...
An autonomous underwater vehicle (AUV) ""Slocum Glider"" was deployed on the South coast of Newfoundland to collect oceanographic data from surface to 200 m depth. Between 7 March and 21 March 2012, the CTD mounted on the glider measured temperature, salinity, and dissolved oxygen at different depths ...
National Research Council Canada (NRC) is collaborating with College of the North Atlantic (CNA) to develop an ocean wave-driven pump to supply the CNA shore-based aquaculture centre in Lord's Cove, Newfoundland. NRC provides a combination of physical model testing under controlled laboratory conditions ...
We review opportunities, impediments, regional scope and principles for a Canadian contribution to an Integrated Atlantic Ocean Observing System (IAOOS) in the context of the Galway Alliance. This contribution should build on what exists, plan ahead for data management and data access, be flexible and ...
As fishing has become more industrialized and wild fish stocks increasingly depleted, aquaculture production has grown rapidly to address the shortfalls in capture fisheries and limitations to long-term aquaculture success. One such shortfall is the need to produce a suitable, sustainable, substitute ...
The collapse of the Atlantic cod fishery in the 1990s devastated the economies of many coastal Newfoundland communities. While many have survived through a combination of a much reduced fishery, government funding, and off shore or out of province employment, none of these are sustainable long-term ...
Communications between two autonomous vehicles has been always an important challenge, especially when one of the vehicles is intended for conducting submerged navigation most of its operational time. Underwater communications become in that case the one most common and feasible way for allowing data ...
This study presents a wireless attitude heading and reference system (AHRS) adapted for use in marine environments where it was used to characterize the motion of a pneumatic rotary feed spreader representative of designs commonly utilized in large-scale salmon aquaculture. The attitude of the spreader ...
Commercial Autonomous Underwater Vehicles (AUVs) are in general very complex and expensive machines. Because of this reason, planning long term multi-agent surveys at sea based on the deployment of a substantial number of such kind of vehicles, become a difficult task and, in general, non a realistic ...
The dynamics of a point absorber wave energy collector (WEC) were investigated using the University of New Hampshire (UNH) developed finite element computer program Aqua-FE and tank testing. The WEC design considered here makes use of a buoy rigidly connected to a long, vertical inertia tube which is ...
This paper describes the outcomes of a TechSurge sponsored by the Marine Technology Society focused on ocean sensors. Specific goals of the meeting were (1) provide a forum for the exchange of information related to ocean sensors and their role in long-term, autonomous operation; (2) assess ocean observing ...
This paper presents a thorough approach characterizing the transit efficiency of a hybrid-driven underwater glider (HDUG) with a foldable propeller. A kind of HDUG with a folding propulsion mechanism has been designed in this paper. The HDUG features high efficiency penetrating in ocean like conventional ...
Recently, the need for offshore aquaculture has become increasingly important in raising migratory fish species, such as, tuna and mackerel, in an offshore environment. Moreover, offshore fish cages are located 2-5 km offshore with water depths ranging from 40 to 100 m. Hence, visiting the fish cages ...
Oil and gas operations have moved from conventional petroleum reserves to unconventional petroleum reserves such as remote offshore, deep Ocean and the Arctic. The management of oil spills is especially challenging due to these conditions. Oil spills are typically due to vessels accidents, tanker discharges, ...
This paper presents an overview of this field of research, outlines some of the opportunities available to add value to fishery by-product streams alongside some of our most recent studies and data in this area. In Atlantic Canada around 418 000 tonnes per year waste is produced at fish processing plants. ...
The data-link layer protocol is of great significance for the effectiveness and reliability of the transmission. In terrestrial wireless networks, there are three error control protocols in data-link layer, stop-wait ARQ, go-back-N ARQ and selective ARQ. Moreover, LT code, an advanced error control ...
We demonstrate the performance of optical fibre dissolved oxygen (DO) sensor when subject to different core material and sizes. It was found that fluorescence emission from oxygen sensitive material coated at the end-face of an optical fibre DO sensor varies with core material and sizes. Glass core ...