Growth, feeding, production, and consumption in 0-group bib (Trisopterus luscus L.) and whiting (Merlangius merlangus L.) in a shallow coastal area of the south-west Netherlands
Hamerlynck, O.; Hostens, K. (2003). Growth, feeding, production, and consumption in 0-group bib (Trisopterus luscus L.) and whiting (Merlangius merlangus L.) in a shallow coastal area of the south-west Netherlands, in: Hostens, K. 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. 133-140
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). PhD Thesis. Universiteit Gent. Faculteit Wetenschappen: Gent. XVI, 205, 1 cd-rom pp., more
Related to:Hamerlynck, O.; Hostens, K. (1993). Growth, feeding, production, and consumption in 0-group bib ( Trisopterus luscus L.) and whiting ( Merlangius merlangus L.) in a shallow coastal area of the south-west Netherlands. ICES J. Mar. Sci./J. Cons. int. Explor. Mer 50(1): 81-91. https://dx.doi.org/10.1006/jmsc.1993.1009, more
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| Keywords |
Aquatic organisms > Marine organisms > Fish > Marine fish
Developmental stages > Juveniles
Diets
Feeding
Food conversion
Interspecific relationships > Predation
Nursery grounds
Population functions > Growth
Merlangius merlangus (Linnaeus, 1758) [WoRMS]; Trisopterus luscus (Linnaeus, 1758) [WoRMS]
ANE, Netherlands [Marine Regions]
Marine/Coastal |
| Abstract |
In 1988 juvenile bib (Trisopterus luscus) and whiting (Merlangius merlangus) were studied in a shallow coastal area by monthly sampling with fine-meshed nets. 0-group fish of both species are first caught in May. By the end of the first growth season bib reached about 150mm SL (standard length), whiting about 170mm SL. Maximal densities were recorded in June and by the end of the year most fish had left the area. The instantaneous mortality is estimated at 0.008 day-1 (0.77% day-1 for bib and 0.76% day-1 for whiting) for both species. In May both species depended almost exclusively on calanoid copepods. In June and July mysids and amphipods were the most important invertebrate prey, but small fishes such as gobies provided a substantial proportion of the energy requirements, especially in whiting. From August onwards shrimp and fish dominated the diet in both species. Using Jones' (1974) model, food consumption as per cent body weight day-1 varied between 4 and 6% during summer and declined to 2 to 3% in autumn. Total consumption per unit area of subtidal seafloor, by the 0-group fish of both species taken together, was estimated at 0.47 g ash-free dry weight (ADW) m-2 year-2 using Jones' (1974) model and at 0.57 g ADW m-2 year-1 using a conversion efficiency (P:C ratio) of 0.34. |
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