The aim of this study was to demonstrate the feasibility acoustic telemetry for monitoring fish during farm operations and gather knowledge about Atlantic salmon responses crowding delousing events in a commercial sea-cage. 21 were equipped with novel transmitter tag type using data from pressure sensors accelerometers compute swimming depth activity individual fish. monitored over four months, which they subjected three thermal events. In periods before after delousing, generally exhibited...

AEI Aquaculture Environment Interactions Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 8:407-417 (2016) - DOI: https://doi.org/10.3354/aei00187 AS WE SEE IT Potential environmental risks associated with biofouling management in salmon aquaculture Oliver Floerl1,2,*, Leif Magne Sunde1, Nina Bloecher1 1SINTEF Fisheries and Aquaculture, 7010 Trondheim, Norway 2Present address: Cawthron...

This study examines the potential implications of biofouling management on development an infectious disease in Norwegian farmed salmon. The hydroid Ectopleura larynx frequently colonises cage nets at high densities (thousands colonies per m2) and is released into water during regular in-situ net cleaning. Contact with hydroids' nematocysts has to cause irritation pathological damage salmon gills. Amoebic gill (AGD), caused by amoeba Paramoeba perurans, increasingly international health...

Abstract Biofouling is an ongoing challenge for marine salmon aquaculture, impacting farming operations, fish health and welfare. Current mitigation strategies employed in Norway Scotland rely mainly on the use of antifouling coatings reactive removal biofouling. These approaches are not only costly limited efficacy, but also pose active risks likely contribute to mortality during grow‐out at sea. Given inefficiencies current biofouling management industry’s objectives growth sustainability,...

Recent advances in bio-sensing technologies open for new possibilities to monitor and safeguard the welfare of fishes aquaculture. Yet before taken into practice, applicability all novel biosensors must be validated, breadth their potential uses investigated. Here, we investigated how ECG accelerometry-derived parameters measured using bio-loggers, such as heart rate, acceleration variance acceleration, relate O2 consumption rate (MO2) blood borne indicators stress tissue damage determine...

Abstract The aim of this study was to assess whether activity and heart rate sensor implants can be used measure stress thus estimate one important welfare indicator for fish in aquaculture pens, if such measurements correlate physiological factors measured through blood sampling. experiment consisted two parts: i) a bio-logger where implanted sensors were monitor rates undergoing (crowding); ii) an analysis constituents (cortisol, glucose, lactate, chloride) second group the same treatment....

The development of biofouling on finfish aquaculture farms presents challenges for the industry, but factors underlying nuisance growths are still not well understood. Artificial settlement surfaces were used to examine two possible explanations high rates in Norwegian salmon farms: (1) increased propagule release during net cleaning operations, resulting elevated recruitment rates; and (2) potential reservoir effects farm surfaces. presence was associated with consistently substantially (up...

Biofouling is a challenge for finfish farming as it can impact cage stability and fish health. Amongst others, current strategies against biofouling rely heavily on removal of using in-situ pressure cleaning nets. The waste released into the water where health cultured fish. Grooming, regular nets to prevent communities from establishing, one novel strategy that currently explored tethered underwater robots. In addition, remotely operated vehicles (ROVs) are used inspection net ensure its...

To avoid the negative impacts caused by biofouling development, aquaculture nets around world are periodically cleaned using high-pressure washers. Net cleaning is labour-intense and costly, can damage antifouling coatings on nets, pose contamination as well fish health welfare risks. support environmental sustainability of growing sector, novel net methods needed. This study examined low-pressure-, cavitation-, suction-based technologies alternatives to conventional cleaning. Using field...

Biofouling is one of the challenges that can strongly affect finfish farm economy. Although several studies on biofouling in aquaculture have been conducted Mediterranean Sea, they focused specific taxa or were limited to a particular period sampling. The present study investigated for first time development, composition and variation community with immersion time, season depth. results indicate all these factors influence succession recruitment. Moreover, species had crucial role...

Underwater vehicles and other mobile platforms are seeing increased use as tools within fish farming, particularly due to current trends towards Precision Farming practices, more exposed farming sites. Although many of the applications such (e.g., net cleaning inspection) have become well established industrial it is largely unknown how much operations disturb consequence this disturbance. In study, we explored by exposing Atlantic salmon in commercial cages intrusive objects monitoring...

The hydroid Ectopleura larynx is one of the main fouling organisms on salmon aquaculture cages in Norway; this study investigated novel surface materials and microtopographies to deter its settlement. settlement preferences larvae for 12 with wettabilities ranging from hydrophobic (54°) hydrophilic (112°) were tested a no-choice bioassay. Although differed between materials, highest average polytetrafluoroethylene (95%) lowest untreated polyurethane (53%), no trend regarding could be found...

This paper presents a study where the potential of achieving autonomous net cleaning operations in commercial pens is demonstrated through numerical simulations. Specifically, we investigated solutions for coping with challenges that occur when obstacles appear path an robot. Simulations were conducted using net-crawling robot specifically designed purposes. The model was equipped modified version Elastic Band Method (EBM) enabling it to conduct adaptive motion planning. After proposed...

Understanding the tolerance limits of fish is crucial for developing aquaculture operations that ensure good animal welfare. However, there exist little data describing physiological responses in farmed Atlantic salmon, much because technological tools taking such measurements have not existed. Recent advances electronic implants enabled concurrent measurement electrocardiogram (ECG) and photoplethysmograms (PPG) salmon can be used robust estimation HR oxygen saturation arterial blood (i.e.,...

Marine sensors are widely employed tools for remotely providing a representation of their environment. The primary factor limiting measurement accuracy and deployment longevity is biofouling. For prevention, copper the most applied biocide, often in form adhesive tapes. However, complex shapes these tapes challenging to apply. Furthermore, sensor operating life frequently exceeds antifouling protective period tape exchange systems can be prohibitively time consuming expensive. Alternative...

Abstract Gill disease is a major threat to aquaculture of Atlantic salmon, with an unknown and likely underestimated contribution from cnidarians such as jellyfish biofouling hydroids. To better understand the risk thus enable mitigation, technology for certain identification cnidarian-related gill damage needed. We used hydroid Ectopleura larynx in case study determine whether exposure salmon nematocyst-bearing hydrozoans can be deducted via non-destructive PCR-based methods. In field...

Biofouling is a serious challenge for global salmon aquaculture and farmers have to regularly clean pen nets avoid impacts on stock health farms' structural integrity. The removed material released into the surrounding environment. This includes cnidarian species such as hydroids, whose nematocyst-bearing fragments can impact gill fish welfare. There also increasing evidence of association parasites pathogens with biofouling organisms cleaning fragments. It unknown whether how far local...

This paper proposes methods to enable autonomous operation, specifically for localization and motion planning, of net grooming robots in aquaculture pens validates the proposed both simulations experimental fieldwork. Moreover, this suggests enabling uninterrupted operation by investigating use data from an inertial measurements unit that is a common sensor underwater vehicles, rather than investing upgrading costly sensory systems often require additional installation calibration. In...

The objective of the current study was to determine extent which planktonic sea lice (Lepeophtheirus salmonis Krøyer, 1838 and Caligus elongatus Nordmann, 1832) were present in biofouling on open-sea net pens used for commercial rearing Atlantic salmon (Salmo salar L.), assess if organisms nets act as barriers similar skirts. We have examined two possible interactions lice, first could function a microhabitat with resuspension during cleaning operations. second interaction may cause...

With growing demand for farmed fish, the aquaculture industry is expanding. In order to explore more exposed sites while ensuring employee health and safety, use of underwater vehicles autonomous operations increasing. Among most relevant are biofouling mitigation removal from nets sea cages. These currently carried out by remotely operated vehicles, aim realize such tasks using tether-less, vehicles. However, there several challenges that need be overcome, as providing periodic data...

We describe the use of an optical hyperspectral sensing technique to identify smoltification status Atlantic salmon ( Salmo salar ) based on spectral signatures, thus potentially providing smolt producers with additional tool verify osmoregulatory state salmon. By identifying whether a juvenile is in biological freshwater stage (parr) or has adapted seawater (smolt) before transfer sea, negative welfare impacts and subsequent mortality associated failed incorrect identification may be...