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Fig. 5 | Helgoland Marine Research

Fig. 5

From: Sex-ratio, seasonality and long-term variation in maturation and spawning of the brown shrimp Crangon crangon (L.) in the German Bight (North Sea)

Fig. 5

Long-term interannual variation of fraction of ovigerous female shrimp (>54 mm) in spring (May) from 1958 to 2004. Data are derived from commercial by-catch sampling and scientific DYF Surveys, (a) East Frisia, (b) Elbe Estuary, (c) North Frisia. Fitting of the trend line to data points was done by the distance weighted least square method

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Helgoland Marine Research

ISSN: 1438-3888

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