The effect of vessel avoidance of wintering Norwegian spring spawning herring

Vabø, Rune; Olsen, Kjell; Huse, Ingvar

doi:10.1016/s0165-7836(01)00360-5

Cited by 126 publications

(116 citation statements)

References 13 publications

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“…Descriptors were set in order to eliminate small-sized schools, which are surely not composed of Sardinella aurita, and to avoid fake schools due to noise and backscatter. Fish schools with mean depth values between 20 m and 100 m were removed from the analysis, in order to limit the effects of avoidance behaviour on the measurement of fish school descriptors (Vabø et al 2002) and to restrict observations to schools of S. aurita. To evaluate the effects of location and diel periods (day/night) a principal component analysis (PCA) of fish school descriptors was performed, using the statistical software 'R' …”

Section: Methodsmentioning

confidence: 99%

Schooling behaviour of small pelagic fish: phenotypic expression of independent stimuli

Brehmer¹,

Gerlotto²,

Laurent³

et al. 2007

Mar. Ecol. Prog. Ser.

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We compared echo sounder measurements of fish schools on Venezuelan and Senegalese coastal shelves. In both areas Sardinella aurita was the predominant aggregative species; the stocks are known to be genetically independent. Persistent school typology is described by analysing 7 acoustic surveys in Venezuela and comparing with pioneer observations in Senegal. The echo types encountered in both countries were comparable, with S. aurita and their associated species having comparable schooling behaviour. School morphology appears to be more related to species than to global characteristics of their ecosystems, as fish school descriptors were similar for both stocks. Nevertheless, S. aurita may adopt different school morphologies. Differentiation between day and night fish schools was mainly due to morphological variables, as determined by fractal dimension. Echo types were different between day and night in both Venezuela and Senegal. This analysis shows that several independent parameters can influence school morphology. However, although schooling behaviour is temporally highly variable, it shows several constant, typical 2D morphological structures, i.e. echo types. The observation of small pelagic fish schools occurring during the night is not unusual according to the literature, although a strict diurnal schooling behaviour, with scattering during the night, is often reported. Schooling behaviour appears to be a phenotypic expression depending on biotic and abiotic stimuli, intrinsic characteristics and motivation.

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Section: Methodsmentioning

confidence: 99%

Schooling behaviour of small pelagic fish: phenotypic expression of independent stimuli

Brehmer¹,

Gerlotto²,

Laurent³

et al. 2007

Mar. Ecol. Prog. Ser.

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show abstract

“…Some studies report an effect of vessel noise on fish flight behaviour in the context of population assessments and catch rates for commercially important fish stocks. For example, horizontal and vertical movements away from vessels have been reported for Atlantic herring (Clupea harengus) and Atlantic cod (Gadus morhua) [17,18], presumably in response to ship noise. Another example concerns effects of nearby boating noise on blue-fin tuna (Thunnus thynnus) in large oceanic pens.…”

Section: Box 2 Underwater Sound -An Overviewmentioning

confidence: 99%

A noisy spring: the impact of globally rising underwater sound levels on fish

Slabbekoorn

Bouton

Opzeeland

et al. 2010

Trends in Ecology & Evolution

776

541

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“…The risk of strike is higher close to the tip of the uncovered turbine blades where the velocity is higher. There are however other researchers who believe fish avoid turbines in the same way they avoid any other obstacle like a boat particularly when the obstacle is noisy as in the case of a hydrokinetic turbine (de Robertis and Wilson, 2006;Vabø et al, 2002). Another concern is that a farm of unshrouded turbines could cause large areas of sediment scour or deposition which can alter hydrological regime of the underwater environment (Cada et al, 2007).…”

Section: Environmental Considerations Of Hydrokinetic Turbinesmentioning

confidence: 99%