A Simple and Inexpensive Trap for Catching Downstream Migrants

Cresswell, Richard

doi:10.1111/j.1365-2109.1977.tb00208.x

Cited by 4 publications

(4 citation statements)

References 9 publications

(8 reference statements)

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“…The statistical significance of differences between these distributions was assessed using the Kolmogorov Smirnov test (Siegal, 1956). Information on fish moving relatively long distances downstream was obtained from traps (Cresswell, 1977(Cresswell, , 1979 on the lower Clettwr (Fig. 1).…”

Section: Methodsmentioning

confidence: 99%

Post-stocking Movements and Recapture of Hatchery-reared Trout Released into Flowing Waters - Effect of a Resident Wild Population

Cresswell

Williams

1984

Aquaculture Res

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The post‐stocking movements and survival of hatchery‐reared brown trout (Salmo trutta L.) (length 18–19 cm) stocked into depopulated and control stretches of the Afon Clettwr, South Wales, were investigated. Data were obtained from electrofishing surveys and rewarded tag returns. Recapture rates ranged from 67–76% for both stretches. The resident population of wild brown trout had no significant effect on the dispersion of the stocked fish, the majority of which remained close to the point of stocking. No stocked fish were recovered from the experimental stretches in the year following their introduction. Within one year the depopulated stretch had been recolonized by wild trout. The implications upon restocking after a fish kill are discussed.

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Section: Methodsmentioning

confidence: 99%

Post-stocking Movements and Recapture of Hatchery-reared Trout Released into Flowing Waters - Effect of a Resident Wild Population

Cresswell

Williams

1984

Aquaculture Res

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show abstract

“…1) with additional information being provided by anglers' returns for which rewards were paid. Information on fish moving relatively long distances downstream was obtained from traps (Cresswell, 1977(Cresswell, , 1979 fitted on the lower Clettwr ( Fig. 1).…”

Section: Methodsmentioning

confidence: 99%

Post‐ stocking movements and recapture of hatchery‐reared trout released into flowing waters—effect of prior acclimation to flow

Cresswell

Williams

1983

Journal of Fish Biology

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Hatchery-reared brown trout, Salmo truttu, (F.L., 16-27 cm) were stocked into the Afon Clettwr, Afon Western Cleddau and Afon Dysynni, Wales. The effects of (a) retaining fish caged in the river for 24 h before release, and (b) a period of acclimation to flowing water (up to 0.24 m S-I) in tanks prior to stocking were investigated. Data on percentage recapture and post-stocking movements were obtained from trapping, electrofishing and tag returns. In-stream acclimation resulted in a higher percentage recapture and a more limited dispersion of the fish stocked under low river flow conditions, but had no effect on trout stocked into a river where higher water velocities were experienced. Acclimation, in tanks, to a flow of 0.1 m s-I for 14 days led to higher percentage recaptures, whereas acclimation for only 2 days resulted in fewer returns than for unacclimated fish. No differences in fish distribution within the rivers could be attributed to these acclimation procedures.

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“…These, however, generally require installation of bulky, permanent, and often expensive impounding devices. A simpler and less expensive trap has been described (Cresswell, 1977). In certain situations anchored nets designed for sampling eggs (Hass, 1968) can be used to sample migrating larvae (Belyy, 1972).…”

Section: Capture Of Fish Migrating Downstreammentioning

confidence: 99%

Sampling Larval and Juvenile Fish Populations in Freshwater

Treasurer

1978

Aquaculture Res

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A Simple and Inexpensive Trap for Catching Downstream Migrants

Cited by 4 publications

References 9 publications

Post-stocking Movements and Recapture of Hatchery-reared Trout Released into Flowing Waters - Effect of a Resident Wild Population

Post-stocking Movements and Recapture of Hatchery-reared Trout Released into Flowing Waters - Effect of a Resident Wild Population

Post‐ stocking movements and recapture of hatchery‐reared trout released into flowing waters—effect of prior acclimation to flow

Sampling Larval and Juvenile Fish Populations in Freshwater

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