Impact of discard mortality in Crangon fisheries on year-class strength of North Sea flatfish species

Berghahn, Rüdiger; Purps, Martin

doi:10.1016/s1385-1101(98)00017-3

Cited by 16 publications

(7 citation statements)

References 14 publications

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“…The German Bight (GB) in the south-eastern North Sea has long been recognized as a nursery area for juveniles of many commercially important fish species, which are most abundant there between spring and fall (e.g., Clupeidae (Alshut, 1989), Gadidae (Berghahn, 1996), Pleuronectidae (Berghahn and Purps, 1998). The GB is known for its high levels of primary and secondary production (Tillmann et al, 2000) resulting from nutrient enrichment due to coastal upwelling, tidal mixing, and river outflow (Krause et al, 1986).…”

Section: Introductionmentioning

confidence: 99%

The German Bight (North Sea) is a nursery area for both locally and externally produced sprat juveniles

Baumann

Malzahn

Voss³

et al. 2009

Journal of Sea Research

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Section: Introductionmentioning

confidence: 99%

The German Bight (North Sea) is a nursery area for both locally and externally produced sprat juveniles

Baumann

Malzahn

Voss³

et al. 2009

Journal of Sea Research

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“…Within the German Ecosystem research project (Breckling et al., 1994), samples were gathered in a similar manner to Tiews’ investigations. A total of 211 by‐catch samples from commercial vessels were analysed in 1988 and 1989 and an additional 524 samples came from vessels chartered in Schleswig‐Holstein in 1990–1992 (Berghahn and Purps, 1998).…”

Section: By‐catch Definition and History Of By‐catch Investigationsmentioning

confidence: 99%

The by-catch situation in German brown shrimp (Crangon crangonL.) fisheries with particular reference to plaice (Pleuronectes platessaL.)

Neudecker

Damm

2010

Journal of Applied Ichthyology

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Summary Since 1928 and over the history of German fishing for brown shrimp (Crangon crangon L.), several investigations have been made examining the by‐catch of this small‐meshed fishery. By‐catch of commercially valuable fish, particularly flatfish species, has always been a matter of concern. The amount of by‐catch comprising fish and invertebrates may actually be high, but figures discussed in public are biased by including discarded undersized shrimp, the target species, and dead material. Many changes in the equipment and practices of the fishery have occurred through the decades. As a result, the overall balance between consumption shrimp, by‐catch and undersized shrimp has changed in a positive sense. Those fish still taken as by‐catch despite the use of more selective trawls are often discarded and no longer landed for reduction purposes, leaving a chance to survive. Their species spectrum is largely stable over time. In this paper, detailed considerations are made in the particular case of North Sea plaice (Pleuronectes platessa L.), which are abundant in the by‐catch and is a commercially important species. Any large numbers discarded must be regarded in the light of high numbers of offspring, the large discards of the flatfish fishery and the high natural mortality of juvenile plaice. From that the conclusion is drawn, that the German shrimp fishery meets criteria of sustainability in respect to the target species and by‐catch situation.

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“…Estimates of discard mortality of 0-group plaice and sole 300 in the Schleswig Holstein shrimp fishery (1982)(1983)(1984)(1985)(1986)(1987)(1988)(1989)(1990)(1991)(1992) were provided by BERGHAHN & PURPS (1998). National time series of discard data are widely available but mostly too short in time and too limited in terms of the ratio of sampling effort to total fishing effort.…”

Section: Predation Mortalitymentioning

confidence: 99%

North sea fish and higher trophic levels: a review

Floeter

Temming

2003

Senckenbergiana maritima

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Impact of discard mortality in Crangon fisheries on year-class strength of North Sea flatfish species

Cited by 16 publications

References 14 publications

The German Bight (North Sea) is a nursery area for both locally and externally produced sprat juveniles

The German Bight (North Sea) is a nursery area for both locally and externally produced sprat juveniles

The by-catch situation in German brown shrimp (Crangon crangonL.) fisheries with particular reference to plaice (Pleuronectes platessaL.)

North sea fish and higher trophic levels: a review

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