caa a22 4500 397551347 CHVBK 20180308164751.0 cr unu---uuuuu 161202e199610 xx s 000 0 eng 10.1006/jmsc.1996.0097 doi (NATIONALLICENCE)oxford-10.1006/jmsc.1996.0097 Dietary composition and the potential of food competition between 0-group cod (Gadus morhua L.) and some other fish species in the littoral zone [Elektronische Daten] [Karen Fjøsne, Jakob Gjøsæter] 0-group cod (Gadus morhua L.), 0-group whiting (Merlangius merlangus L.), goldsinny wrasse (Ctenolabrus rupestris L.), and black goby (Gobius niger L.) were caught near Arendal in August and October 1991. Dietary composition showed that 0-group cod mainly ate calanoid copepods, gammarids, shrimps or prawns, crabs, and fish. They were generalists with a wide feeding niche. Mostly active benthic, hyperbenthic, and pelagic prey were ingested. 0-group whiting mostly ate calanoid copepods, hyperids, crabs, appendicularians, and fish. They were more specialised feeders than 0-group cod. On some occasions, whiting ate large amounts of megalopas and calanoid copepods. Prey were active benthic, hyperbenthic, or pelagic and consisted of more pelagic prey and fish than that of any of the other fish species. Goldsinny wrasse were generalists and mostly ate bryozoans, gastropods, bivalves, caprellids, gammarids, shrimps or prawns, and crabs. Prey were active, slow moving, or sedentary, and mostly benthic or hyperbenthic. Black goby mostly ate gammarids, crabs, and fish, but many of them also ate gastropods, bivalves, shrimps or prawns, insects, and poly-chaetes. They were also generalists with a wider feeding niche than 0-group cod and 0-group whiting. Black goby ate active, slow moving, or sedentary prey, mostly benthic or hyperbenthic. Dietary composition differed significantly between locations in each period and between periods in each location for all species (except black goby). The diets of 0-group cod and 0-group whiting were more similar compared to the diets of the other fish, indicating potential food competition only between these two species. Both ate many fish, but also, on some occasions, many megalopas and the copepod species Calanus finmarchicus. Differences in behaviour may, however, reduce competition. © 1996 International council for the Exploration of the Sea Articles nationallicence stomach content nationallicence food competition nationallicence dietary overlap nationallicence littoral zone nationallicence Gadus morhua nationallicence Merlangius merlangus nationallicence Ctenolabrus rupestris nationallicence Gobius niger nationallicence Fjøsne Karen Institute of Marine research, Flødevigen Marine Research Station, 4817, His, Norway aut Gjøsæter Jakob Institute of Marine research, Flødevigen Marine Research Station, 4817, His, Norway aut ICES Journal of Marine Science Oxford University Press 53/5(1996-10), 757-770 1054-3139 53:5<757 1996 53 icesjms https://doi.org/10.1006/jmsc.1996.0097 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1006/jmsc.1996.0097 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Fjøsne Karen Institute of Marine research, Flødevigen Marine Research Station, 4817, His, Norway aut NATIONALLICENCE 700 1- Gjøsæter Jakob Institute of Marine research, Flødevigen Marine Research Station, 4817, His, Norway aut NATIONALLICENCE 773 0- ICES Journal of Marine Science Oxford University Press 53/5(1996-10), 757-770 1054-3139 53:5<757 1996 53 icesjms Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford