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Spatial feeding patterns of herring (Clupea harengus L.), sprat (Sprattus sprattus L.), and the three-spined stickleback (Gasterosteus aculeatus L.) in the Gulf of Finland, Baltic Sea
- Source :
-
ICES Journal of Marine Science / Journal du Conseil . Sep2004, Vol. 61 Issue 6, p966-971. 6p. - Publication Year :
- 2004
-
Abstract
- The pelagic-fish fauna in the Gulf of Finland, Baltic Sea was sampled by trawling and hydroacoustics in September 2002. Spatial and size/age-dependent patterns in the diets of herring (Clupea harengus), sprat (Sprattus sprattus), and the three-spined stickleback (Gasterosteus aculeatus) were explored. At night the fish concentrated at thermocline depth but at dawn they scattered over a larger depth range. All three fish species fed on mesozooplankton but nektobenthos, for example, was scarce. In the eastern Gulf of Finland, where there is a strong freshwater inflow, the cladoceran Bosmina longispina was the dominant prey item, but it was also abundant in the diets of young-of-the-year (total length <10cm) clupeids in the western Gulf of Finland. In these more saline western areas, calanoid copepods, especially Eurytemora affinis, were the most important prey for large (≥10cm) clupeids. The large clupeids in particular, also fed on Temora longicornis. The diet of three-spined stickleback overlapped with that of the clupeids. However, Cercopagis pengoi, a recent arrival to the area, was much more abundant in the diet of stickleback than in the diet of clupeids. [Copyright &y& Elsevier]
- Subjects :
- *UNDERWATER acoustics
*THREESPINE stickleback
*STICKLEBACKS
Subjects
Details
- Language :
- English
- ISSN :
- 10543139
- Volume :
- 61
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- ICES Journal of Marine Science / Journal du Conseil
- Publication Type :
- Academic Journal
- Accession number :
- 14583041
- Full Text :
- https://doi.org/10.1016/j.icesjms.2004.06.008