Density and Distribution of Fish in a River with a Pronounced Heterogeneity of the Environment: Hydroacoustic Survey

Gerasimov, Yu. V.; Borisenko, E. S.; Bazarov, M. I.; Столбунов, И. А.

doi:10.1134/s1995082919050079

Cited by 12 publications

(5 citation statements)

References 7 publications

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“…Hydroacoustics offers an accepted method [4,5] to quantitatively survey mid channel open water habitat, found extensively in the navigable channelised middle reaches of the river. Over the last three decades hydroacoustics has increasingly been implemented worldwide to survey both river [6][7][8][9] and lake [10][11][12][13][14][15][16] freshwater fish populations, due to its ability to efficiently and non-invasively sample large volumes of water and habitats not suited to traditional fish capture methods [17,18].…”

Section: Introductionmentioning

confidence: 99%

An Assessment of Hydroacoustic and Electric Fishing Data to Evaluate Long Term Spatial and Temporal Fish Population Change in the River Thames, UK

Lyons

Hateley

Peirson

et al. 2021

Water

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This paper reports the results from mobile hydroacoustic surveys carried out between 1994 and 2018, to assess the fish stocks in four impounded reaches, covering 19.8 km of the River Thames, England. The data are complemented with electric fishing boom boat results, collected at the same study reaches and time periods. Hydroacoustic surveys used inter-calibrated dual and split-beam scientific echosounders, with the transducers beaming horizontally across the river to provide fish abundance and distribution estimates. Electric fishing surveys provided catch per unit effort estimates and information on size structure and species composition. Catch data from the margins of the study reaches were dominated by roach (Rutilus rutilus), with bleak (Alburnus alburnus) dominant in mid-river. Hydroacoustic data demonstrated patchy spatial distribution, often associated with natural and anthropogenic habitat features. Cyclical peaks and troughs in both hydroacoustic and electric fishing abundance were found. There were periods of correspondence with electric fishing abundance estimates, but also periods of significant divergence. The concept of ‘Shifting Baseline Syndrome’ is discussed with reference to these data, illustrating the importance of viewing long term quantitative information when using meaningful reference points. The potential impact of river temperature and flow on the fish population data are discussed.

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Section: Introductionmentioning

confidence: 99%

An Assessment of Hydroacoustic and Electric Fishing Data to Evaluate Long Term Spatial and Temporal Fish Population Change in the River Thames, UK

Lyons

Hateley

Peirson

et al. 2021

Water

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“…With the improvement of instrument performance and the development of computer software, the hydroacoustic method has increasingly become one of the main methods for fishery stock assessments due to its advantage of a rapid, economic and extensive coverage of the water cross-section at distances large enough not to affect fish behavior (Simmonds and MacLennan 2005), and now has been widely used in many bodies of water (Hale et al 2008;Pavlov et al 2010;Gerasimov et al 2019;Guo et al 2019).…”

Section: Introductionmentioning

confidence: 99%

The time-area fishing closure impacts on fish stock; Qiantang River before and after a four-month fishing closure

Zhang¹,

Luo²,

Jun³

et al. 2021

AIeP

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Fishing closures, commonly used to manage fisheries’ catch, involve temporarily closing a body of water to particular fishing gears to control fishing effort and protect feeding and spawning areas. In recent years in Qiantang River of China, with the socio-economic development, protection of fish stock has become increasingly urgent. The year 2019 was the first year that Qiantang River was included in the unified fishing ban system for the south of Yangtze River basin. Here, fish captures and hydroacoustic surveys were carried out in the research area of Qiantang River in order to present comparative descriptions of the dominant fish species, the temporal changes of fish size, density, biomass, and distribution affected by the four-month fishing closure in 2019. The results showed that Pseudobrama simoni (Bleeker, 1864) was the most dominant species both before and after the closure by using the traditional capture method. The mean target strength (TS) of overall fish after closure was –50.28 ± 0.19 dB, which was lower than that before, resulting in a significantly shorter derived mean length (13.42 ± 0.74 cm). The mean fish density and calculated biomass after closure were both significantly higher than that before it. More than 50% of fish species were distributed in the water of 5–20 m depth after the closure, which likely occurred in water deeper than 20 m before. Meanwhile, fewer outliers were found in different depth categories after closure. It is concluded that the four-month closure in 2019 had a positive effect on fish size, density, and biomass, leading to protection of pelagic fishes and a more even distribution of fish.

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“…Musi Estuary has an important role, namely as a care area, namely biodata, the fish foraging and sheltering and spawning some fish. Some fish in estuarine waters have migratory habits, and the structure of the fish community is influenced by season and time [2][3].…”

Section: Introductionmentioning

confidence: 99%

Target strength measurement of Caroun croaker (Johnius sp.) and acoustic fish density estimation in Musi Estuary, South Sumatra

Supriyadi

Jaya

Pujiyati

et al. 2021

IOP Conf. Ser.: Earth Environ. Sci.

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Caroun Croaker ( Johnius sp.) is one of the dominant estuarine fish that has a reasonably high economic value. The target strength (TS) value measurement is essential in calculating the density of fish stocks using the hydroacoustic method. Target strength measurement of Caroun Croaker (Johnius sp.) and an acoustic survey in Musi Estuary Waters of South Sumatra Province was conducted in December 2019. The result of TS measurement will be used to estimate the acoustic density along the survey area. The TS measurement used the standard tethered method, tying placing the fish in a fixed cage, transmitting the acoustic pulse, and analyzing its return using the scientific acoustic instrument Biosonic DT-X 200 KHz. The fisheries acoustic survey was carried out in the area around the Musi estuary with a predetermined survey design. The results of the measurements have obtained the TS-length relationship, as TS= 20 LOG L-78.79 with determinant value of R2= 0.67 for fish length ranges from 18.1-23.3 cm, and an acoustic survey showed that the estimated stock density value was 286 kg/ha for the total surveyed area of 1.612 ha.

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Density and Distribution of Fish in a River with a Pronounced Heterogeneity of the Environment: Hydroacoustic Survey

Cited by 12 publications

References 7 publications

An Assessment of Hydroacoustic and Electric Fishing Data to Evaluate Long Term Spatial and Temporal Fish Population Change in the River Thames, UK

An Assessment of Hydroacoustic and Electric Fishing Data to Evaluate Long Term Spatial and Temporal Fish Population Change in the River Thames, UK

The time-area fishing closure impacts on fish stock; Qiantang River before and after a four-month fishing closure

Target strength measurement of Caroun croaker (Johnius sp.) and acoustic fish density estimation in Musi Estuary, South Sumatra

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