Editorial for Special Issue: Fishery Acoustics, Applied Sciences, and Practical Applications

Kim, Kiseon; Kim, Moo Hyun; Shevlyakov, Georgy; Shin, Seokjoo

doi:10.3390/app9224774

Cited by 1 publication

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“…The pelagic fish density can be effectively estimated and monitored by means of echosounding [ 8 , 28 , 29 , 30 ]. The method gives an estimate of the number of pelagic fish per ha and size distribution of the fish stock based on the echo strength along selected transects.…”

Section: Introductionmentioning

confidence: 99%

Effects of Lake Productivity on Density and Size Structure of Pelagic Fish Estimated by Means of Echosounding in 17 Lakes in Southeast Norway

Linløkken

2021

Sensors

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Density estimation of pelagic fish was performed by means of single beam echosounding in 17 lakes within a period of 34 years, from 1985 to 2018. Surveys were performed repeatedly (two to fourteen times) in five lakes. The density estimates ranged from 34 to 4720 fish/ha and were significantly correlated with total phosphorus concentration. The high density in relatively phosphorus rich lakes (TP > 10 µg/L) was comprised of small fish (<20 cm) and was partly due to the higher number of pelagic fish species. The number of pelagic species varied from one, Arctic charr, in the most elevated and oligotrophic lakes, and whitefish dominated in less elevated oligotrophic lakes. In lowland lakes characterized as mesotrophic or tending to mesotrophy, smelt, vendace, and two to three cyprinids comprised the pelagic fish stock. These fish species predate zooplankton effectively, and species composition and body size of planktonic cladocerans was affected by fish density. Large species of Daphnia were lacking in lakes with high fish density, and body size of present species, D. galeata, D. cristata, and Bosmina spp. were negatively correlated with pelagic fish density.

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Section: Introductionmentioning

confidence: 99%

Effects of Lake Productivity on Density and Size Structure of Pelagic Fish Estimated by Means of Echosounding in 17 Lakes in Southeast Norway

Linløkken

2021

Sensors

View full text Add to dashboard Cite

show abstract

Editorial for Special Issue: Fishery Acoustics, Applied Sciences, and Practical Applications

Abstract: Fishery acoustics (How to detect and monitor fish and other marine life [...]

Cited by 1 publication

References 13 publications

Effects of Lake Productivity on Density and Size Structure of Pelagic Fish Estimated by Means of Echosounding in 17 Lakes in Southeast Norway

Effects of Lake Productivity on Density and Size Structure of Pelagic Fish Estimated by Means of Echosounding in 17 Lakes in Southeast Norway

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