An electrofishing apparatus for sampling sublittoral benthic marine habitats

Phillips, Bruce F.; Scolaro, Alessandro

doi:10.1016/0022-0981(80)90138-0

Cited by 7 publications

(3 citation statements)

References 4 publications

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“…When catching (or affecting) large decapodes like crayfishes it is also advantageous to use constant direct current as the risk of the animals loosing their claws will be reduced. An interesting combination unit for catching bottom dwelling animals have been constructed by Phillips and Scolaro (1980). They used constant direct current to make the animals leave cover, after which alternating current (0.1 V/cm) was used to immobilize the attracted animals.…”

Section: Physical Factorsmentioning

confidence: 99%

Electrofishing — Theory and practice with special emphasis on salmonids

et al. 1989

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This report attempts to establish guide-lines for electrofishing in population studies and is the result of literature studies and experience from electrofishing in Denmark, Finland, Norway and Sweden. Equipment, safety and training, sampling design and precision requirements for various types of investigations, population estimation and fishing practice are discussed. The results are put forward in the form of recommendations.Special attention is paid to the sampling design of surveys in streams of different types and for different purposes. Examples of the computation procedures are also included.

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Section: Physical Factorsmentioning

confidence: 99%

Electrofishing — Theory and practice with special emphasis on salmonids

et al. 1989

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“…Other recent studies have used electricity to exclude decapods (Phillips and Scolaro 1980;Pringle and Blake 1994), invertebrates (Brown et al 2000), and to sample stream invertebrates (Fièvet et al 1996;Rabeni et al 1997;Taylor et al 2001). This study expands on previous work by asking the following questions.…”

Section: Reach-scale Manipulations Show Invertebrate Grazers Depress mentioning

confidence: 99%

Reach‐scale manipulations show invertebrate grazers depress algal resources in streams

Taylor

McIntosh

Peckarsky

2002

Limnology & Oceanography

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Experimental tools that enable manipulations of organisms at larger scales allow for comparisons of processes across multiple spatial scales and expand our ability to make predictions about ecological processes. We performed reach scale (i.e., 50 m2) manipulations of invertebrate communities in streams using a modified electroshocking technique to nondestructively remove invertebrates. In addition, we conducted a microcosm experiment (i.e., 157 cm2) with different grazer densities that enabled comparison of the strength of grazer‐algal interactions at large and small spatial scales. In high elevation headwater streams, electroshocking reduced total invertebrate abundance by 84% in a 50‐m2 reach of stream. Although mobile invertebrates recolonized the manipulated area rapidly, daily electroshocking maintained the density reduction. Electroshocking reduced the density of herbivorous invertebrates 86%, which resulted in a 57% increase in algal biomass, whereas in a stream that was not electroshocked, invertebrate density and algal biomass changed much less, only 16 and 8%, respectively. Comparison of grazer effect on periphyton between microcosm and reach‐scale experiments revealed that the per capita interaction strength of grazers on primary producers was three times greater in the reach‐scale manipulation than that observed in the microcosm experiments. Reach‐scale manipulation of invertebrate grazers in streams provides a powerful method to experimentally test patterns observed in the field at a large spatial scale, with more realism than streamside microcosms or small cages in streams.

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“…Some such as Rotenone are toxic, but the Quinaldine compounds (Gibson, 1967) have an anaesthetic action and usually cause no permanent damage. An electrofishing technique, claimed to be less selective for sampling rock lobsters in that 'soft' individuals which have moulted are also taken, is described by Phillips and Scolaro (1980). An electrofishing technique, claimed to be less selective for sampling rock lobsters in that 'soft' individuals which have moulted are also taken, is described by Phillips and Scolaro (1980).…”

Section: Other Methods Of Samplingmentioning

confidence: 99%