A preparatory study on fish behavioral properties in a set-net

Kang, Myounghee; Liu, Jen-Ming; Hassan, Raja Bidin bin Raja; Fajaryanti, Rina; Hwang, Bo-Kyu

doi:10.3796/ksfot.2020.56.2.105

Cited by 3 publications

(5 citation statements)

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“…To observe the movement of fish in the net, the imaging sonar is commonly deployed in the middle of the net (Kang et al, 2020; Williams et al, 2013). The fish counts across the diel cycle are estimated to determine the optimal fishing time (Kang et al, 2020). Furthermore, the detailed responses of fish inside the nets, including escaping behaviour and herding behaviour, are also observed according to swimming trajectory and direction to evaluate the performance of the nets (Williams et al, 2013).…”

Section: Applications In Fish Monitoringmentioning

confidence: 99%

“…The responses of fish to the fishing gears are investigated to evaluate the efficacy and selectivity of fishing gear and aid its design (Williams et al, 2013). Typically, the movement in the net (Kang et al, 2020; Williams et al, 2013), avoidance of the trawl (Jůza et al, 2013; Rakowitz et al, 2012) and occupation of the fishing gears (Fujimori et al, 2018; Nichols et al, 2014) are studied with high‐frequency MFLS.…”

Section: Applications In Fish Monitoringmentioning

confidence: 99%

Section: Applications In Fish Monitoringmentioning

confidence: 99%

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Monitoring fish using imaging sonar: Capacity, challenges and future perspective

Wei

Duan

2022

Fish and Fisheries

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The demand for fish products, which provide crucial protein for humans, is rising as the global population grows. In contrast, fish stock is declining due to human activity, environmental changes and overfishing. Fish monitoring provides valuable support data for effective fishery management and ecosystem conservation. The common monitoring methods are based on manual sampling, which is time-consuming, laborious and intrusive. Imaging sonar is a hydroacoustic system that produces acoustic images similar to optical images by transmitting and receiving sound waves, allowing for in situ monitoring of fish non-intrusively in the dark and turbid water environments where optical cameras are limited. In the last decade, imaging sonar, especially high frequency multibeam forward-looking sonar and side-scan sonar, has been widely used in fish monitoring. We reviewed the literature from the previous decade on the use of these two types of imaging sonar in fish species identification, abundance estimation, length measurement and behaviour analysis, as well as the sonar imagery processing concerning fish. The review results show that these imaging sonars are efficient and effective tools for fish monitoring in complex environments. The challenges include(1) the recognition of small fish forming dense aggregations; (2) species identification, which limits their use in species-specific studies; (3) time-consuming massive data processing. Therefore, advanced algorithms for sonar imagery processing and integrations with other sampling technologies are needed for future development.

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Section: Applications In Fish Monitoringmentioning

confidence: 99%

Section: Applications In Fish Monitoringmentioning

confidence: 99%

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Monitoring fish using imaging sonar: Capacity, challenges and future perspective

Wei

Duan

2022

Fish and Fisheries

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“…Additionally, in the view of biodiversity conservation, fish species selection and catch management are required. Several studies have been conducted, including research on optimizing mesh sizes for set-net [17], analyzing the behavioral characteristics of fish within these nets and estimating fish species [18,19], and the development of real-time monitoring and estimation systems tailored for set net fishing [20]. Notably, research is underway to understand the biological behavior of sea turtles in set-net [21].…”

Section: Introductionmentioning

confidence: 99%

“…The hose net fish-hauling device is the core technology used in Next-Generation Set-net Fishing. When combined with Ultrasonic Fish Finder [13], fish prediction technology [18,19], and offshore power generation, it is expected to realize complete automation of set-net fishing. It is also expected to be used for fish stock selection, protection of endangered species, and efficient catch management.…”

mentioning

confidence: 99%

Water-Tank and Semi-Field Experimental Investigation of a Hose Net Fish-Hauling Device for Next-Generation Set-Net Fishing

Li,

Dong,

Furuichi

et al. 2023

JMSE

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The flexible fire hose and net (hose net) is a novel fish-hauling device developed for set-net fishery. The hose net is placed inside the box chamber net, air is injected from one edge of the hose net, the hoses are inflated, and the buoyancy force is increased. The net floats up gradually, cornering the fish on the other edge. In previous studies, we have conducted a series of floating-up and sinking-down experiments to evaluate the performance of the hose net in calm water. In this study, aimed at the practical implementation of the hose net fish-hauling system, we conducted a water tank experiment and a semi-field test to confirm the operation of the hose net, which was installed inside a box chamber net model. The results demonstrated that the net could float up gradually in an ideal form and stretched on the surface of the box net. The time taken to float up processes varied with the air injected into the auxiliary hose and hose net, so that the motion of the hose net could be controlled by adjusting the air at different parts of practical operation. Furthermore, semi-field trials were conducted to verify its performance in the natural marine environment and its ability to capture schools of fish. Overall, this innovative hose net fish-hauling device is expected to be valuable for next-generation set-net fishing.

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Applications and analytical approaches using imaging sonar for quantifying behavioural interactions among aquatic organisms and their environment

Munnelly,

Castillo,

Handegard

et al. 2023

ICES Journal of Marine Science

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For many aquatic animals, distributional patterns, trophodynamic relationships, and reproductive activity are driven by complex biotic and abiotic ecosystem interactions that influence behaviour. Linking behavioural information to environmental stimuli and stressors can, therefore, help to anticipate population and ecosystem responses to changing conditions and inform management. However, behavioural information is challenging to obtain because many sampling gears do not provide adequate spatial or temporal resolution, or potentially alter behaviours. Traditionally, most behavioural studies have been laboratory experiments, while behaviour in situ has often been inferred indirectly. Advancements in imaging sonar technology enable the study of in situ behaviours with the potential to address many understudied relationships. In this review we discuss applications of imaging sonar among a meta-analysis of 155 studies of aquatic organisms in their environments. We evaluate the performance of imaging sonar for studying inter- and intra-specific interactions, associations with complex and sensitive habitats and low-visibility environments, and to evaluate traditional fisheries sampling gears. We examine the data processing and analytical methods used to refine taxonomic resolution, manage time use and autocorrelation through sub-sampling, extract behavioural metrics applied to ecological processes, and for automating abundance estimates and image classification with the goal of providing a resource for researchers.

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A preparatory study on fish behavioral properties in a set-net

Cited by 3 publications

References 1 publication

Monitoring fish using imaging sonar: Capacity, challenges and future perspective

Monitoring fish using imaging sonar: Capacity, challenges and future perspective

Water-Tank and Semi-Field Experimental Investigation of a Hose Net Fish-Hauling Device for Next-Generation Set-Net Fishing

Applications and analytical approaches using imaging sonar for quantifying behavioural interactions among aquatic organisms and their environment

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