Effect of current and daylight variations on small-pelagic fish aggregations (Selar crumenophthalmus) around a coastal fish aggregating device studied by fine-scale acoustic tracking
نویسندگان
چکیده
منابع مشابه
Role of current and daylight variations on small-pelagic fish aggregations around a coastal FAD from accurate acoustic tracking
We monitored twelve acoustically-tagged small pelagic fish (Selar crumenophthalmus) around a floating object in shallow water, playing the role of a coastal fish aggregating device (FAD). We characterized the response of the tagged-fish aggregation to varying current strengths and daylight. We found that the current induced a displacement of the aggregation upstream of the FAD, at distances tha...
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Demonstrating and quantifying the respective roles of social interactions and external stimuli governing fish dynamics is key to understanding fish spatial distribution. If seminal studies have contributed to our understanding of fish spatial organization in schools, little experimental information is available on fish in their natural environment, where aggregations often occur in the presence...
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Identifying spatial and temporal patterns can reveal the driving factors that govern the behavior of fish in their environment. In this study, we characterized the spatial and temporal occupation of 37 acoustically tagged bigeye scads (Selar Crumenophthalmus) in an array of shallow Fish Aggregating Devices (FADs) to clarify the mechanism that leads fish to associate with FADs. A comparison of t...
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INTRODUCTION Anchored bamboo fish-aggregating devices (FADs) are used to catch tuna and small pelagic fish. Several hypotheses had been advanced previously to explain the association of fish with FADs (Castro et al. 2002; Fréon & Misund 1999), but the processes responsible for fish attraction and aggregation remain unknown. There is no previous research on fish behaviour related to sound near F...
متن کاملResponses of free-living coastal pelagic fish to impulsive sounds.
The behavior of wild, pelagic fish in response to sound playback was observed with a sonar/echo sounder. Schools of sprat Sprattus sprattus and mackerel Scomber scombrus were examined at a quiet coastal location. The fish were exposed to a short sequence of repeated impulsive sounds, simulating the strikes from a pile driver, at different sound pressure levels. The incidence of behavioral respo...
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ژورنال
عنوان ژورنال: Aquatic Living Resources
سال: 2012
ISSN: 0990-7440,1765-2952
DOI: 10.1051/alr/2012025