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| The mysid-feeding guild of demersal fishes in the brackish zone of the Westerschelde estuary |
| Hostens, K.; Mees, J. (1999). The mysid-feeding guild of demersal fishes in the brackish zone of the Westerschelde estuary, in: (1999). VLIZ Coll. Rep. 29(1999). VLIZ Collected Reprints: Marine and Coastal Research in Flanders, 29: pp. chapter 18 [Subsequent publication] |
| In: (1999). VLIZ Coll. Rep. 29(1999). VLIZ Collected Reprints: Marine and Coastal Research in Flanders, 29. Flanders Marine Institute (VLIZ): Oostende, meer |
| In: VLIZ Collected Reprints: Marine and Coastal Research in Flanders. Vlaams Instituut voor de Zee: Oostende. ISSN 1376-3822, meer |
| Ook gepubliceerd als |
- Hostens, K.; Mees, J. (1999). The mysid-feeding guild of demersal fishes in the brackish zone of the Westerschelde estuary J. Fish Biol. 55(4): 704-719. hdl.handle.net/10.1006/jfbi.1999.1026, meer
- Hostens, K.; Mees, J. (2003). The mysid-feeding guild of demersal fishes in the brackish zone of the Westerschelde estuary, in: Hostens, K. (2003). The demersal fish and macro-invertebrate assemblages of the Westerschelde and Oosterschelde estuaries (Southern Bight of the North Sea) = De demersale vis- en macro-invertebraten gemeenschappen van de Westerschelde en Oosterschelde estuaria (Zuidelijke Bocht van de Noordzee). pp. 123-132 [Subsequent publication], meer
- Hostens, K.; Mees, J. (1998). The mysid-feeding guild of demersal fishes in the brackish zone of the Westerschelde estuary, in: (1998). ECSA 29 Symposium. Estuarine Research and Management in Developed and Developping countries: Joint ECSA and CERM symposium at the University of Port Elizabeth 13-17 July 1998. Abstract book. pp. 44, meer
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| Trefwoorden |
Biologische staalname; Brakwatervissen; Demersale visserij; Estuaria; Populatiedynamiek; Predatie; Prooiselectie; Voeding; Voedingsgedrag; Clupea harengus [Haring] [WoRMS]; Eurytemora affinis [WoRMS]; Gastrosaccus spinifer (Goës, 1864) [WoRMS]; Merlangius merlangus [Wijting] [WoRMS]; Mesopodopsis slabberi (Van Beneden, 1861) [steeloog-aasgarnaal] [WoRMS]; Neomysis integer (Leach, 1814) [Brakwateraasgarnaal] [WoRMS]; Pleuronectes flesus (Linnaeus, 1758) [Bot] [WoRMS]; Pleuronectes platessa [Pladijs] [WoRMS]; Pomatoschistus lozanoi (de Buen, 1923) [Lozano's grondel] [WoRMS]; Pomatoschistus minutus (Pallas, 1770) [Dikkopje] [WoRMS]; Temora longicornis (Müller, 1792) [WoRMS]; Trigla lucerna Linnaeus, 1758 [Knorhaan] [WoRMS]; Trisopterus luscus (Linnaeus, 1758) [Steenbolk] [WoRMS]; ANE, Nederland, Westerschelde [gazetteer]; ANE, Nederland, Zeeland [gazetteer]; Brak water |
| Abstract |
The demersal fish fauna of the mesohaline zone of the Westerschelde estuary (south-west Netherlands) was sampled intensively in the period 1990-1992. Almost 500 beam trawl samples were taken in both subtidal (330 samples) and intertidal (144 samples) habitats. These yielded 44 fish species, mostly as juveniles. The area functioned as a nursery for several demersal fish species, and harboured large populations of hyperbenthic mysids. Three gobies, three flatfish, one clupeoid and one gadoid dominated the fish fauna, while three mysid species were important components of the holohyperbenthos. From c. 1500 stomach contents of 25 fish species, 44 prey species were identified, the most abundant of which were also common in the hyperbenthal. The demersal fish community consisted of a group that foraged subtidally on fast-moving epi- and hyperbenthic prey (for example gadoids, gobies and clupeoids) and a group that foraged on slow-moving or sessile endobenthic organisms, mainly in intertidal areas (for example most flatfish species). Mysidacea occurred in >50% stomachs analysed and were taken as prey by 19 of the 25 fish species. Mysids were most important in the diets of Pomatoschistus minutus, P. lozanoi, Trisopterus luscus and Merlangius merlangus, and were present in appreciable numbers in Pleuronectes flesus, Trigla lucerna, Clupea harengus and Pleuronectes platessa. These species fed mainly on the brackish water endemic Neomysis integer. Mesopodopsis slabberi (present in 35% of the gobiid stomachs) and Gastrosaccus spinifer (present in 25% of the gadoid stomachs) were of secondary importance. P. minutus and T. luscus showed a diet shift from calanoids (Eurytemora affinis and Temora longicornis) to mysids at Ls of 30 and 50 mm, respectively. Only 1% of the standing stocks of the N. integer and M. slabberi populations was removed by the local demersal fish community, so top-down control of mysid populations in estuaries seems unlikely. |
| Datasets (4) |
- Stroomversnellingskaart gecombineerd met vis en garnaal na de verdieping van de Westerschelde: 2000-2001. Garnalen: 2000-2001., meer
- Stroomversnellingskaart gecombineerd met vis en garnaal na de verdieping van de Westerschelde: 2000-2001. Vissen: 2000-2001., meer
- Stroomversnellingskaart gecombineerd met voorkomen van vis en garnaal voor de verdieping: 1988-1989. Garnalen: 1988-1989., meer
- Stroomversnellingskaart gecombineerd met voorkomen van vis en garnaal voor de verdieping: 1988-1989. Vissen: 1988-1989., meer
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