Journal article
Is Crangon crangon (L. 1758, Decapoda, Caridea) food limited in the Wadden Sea?
Institute for Hydrobiology and Fishery science, Olbersweg 24, 22767 Hamburg, Germany1
Institute of Avian Research, c/o Research Center Terramare, Schleusenstraße 1, 26382 Wilhelmshaven, Germany2
Dry weight condition (dry weight at length), caloric content and RNA∙DNA−1-ratio of brown shrimp Crangon crangon were monitored in temperature controlled starvation experiments and field samples. A significant decrease of dry weight and RNA∙DNA−1 was observed within the experiments in all length classes (20, 30, 45 and 60mm) and at all temperatures (9, 12, 17 and 20°C).
The highest weight loss of −1.9%·d−1 occurred at 20°C. Dry weight condition and RNA·DNA−1 in field samples from the Wadden Sea (2005–2007) peaked in summer and were lowest in winter, while caloric content increased during winter, possibly indicating vitellogenesis. The results of the starvation experiments were used to interpret observed field conditions suggesting that at least 25% of the shrimp population is food-limited.
Food limitation was most pronounced in the period November until April, where up to 75% of the population exhibited signs of starvation or food limitation.
| Language: | English |
|---|---|
| Year: | 2010 |
| Pages: | 386-400 |
| ISSN: | 18731414 and 13851101 |
| Types: | Journal article |
| DOI: | 10.1016/j.seares.2010.06.001 |
BROWN-SHRIMP Bottom up Brown shrimp Caloric content Condition Crangon crangon Food limitation JUVENILE WHITE SHRIMP LONG-TERM VARIATION NORTH-SEA PENAEUS-ESCULENTUS HASWELL REPRODUCTIVE-CYCLE RNA-DNA RATIOS RNA.DNA(-1) RNA/DNA RATIOSCrangon crangon RNA·DNA−1 SHALLOW MARINE AREAS SHRIMP LITOPENAEUS-VANNAMEI Starvation Weight at length
