Life history, food consumption and resource partitioning in two sympatric gobies Pomatoschistus minutus and P. lozanoi in the Belgian coastal waters
Hamerlynck, O.; Heip, C.H.R.; Redant, F. (1986). Life history, food consumption and resource partitioning in two sympatric gobies Pomatoschistus minutus and P. lozanoi in the Belgian coastal waters. CM Documents - ICES, C.M. 1986(L:14). ICES: Copenhagen. [no pag.] pp.
Part of: ICES CM Documents - ICES. ICES: Copenhagen. ISSN 1015-4744, more
Related to:Hamerlynck, O.; Heip, C.H.R.; Redant, F. (1986). Life history, food consumption and resource partitioning in two sympatric gobies Pomatoschistus minutus and P. lozanoi in the Belgian coastal waters, in: Heip, C.H.R. et al. (Ed.) Ecology, ecotoxicology and systematics of marine benthos. pp. 79-124, more
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| Keywords |
Sympatric populations
Pomatoschistus lozanoi (de Buen, 1923) [WoRMS]; Pomatoschistus minutus (Pallas, 1770) [WoRMS]
ANE, Belgium [Marine Regions]; ANE, North Sea [Marine Regions]
Marine/Coastal |
| Abstract |
Gobies were obtained monthly from the bycatch of a commercial shrimp trawler operating in the shallow waters (less than 20m depth) of the Westdiep area, Southern Bight of the North Sea, from May through December 1984. Pomatoschistus lozanoi juveniles appear later than P. minutus juveniles, indicating a temporal segregation of reproduction. Yearly average density of P. minutus is about twice that of P. lozanoi. Food consumption by the two species amounts to 1-2 g AFDW/m2/year. Stomach analysis of several hundred gobies shows that P. minutus is a food generalist that obtains most of its food from the benthos and epibenthos. P. lozanoi is a more specialised feeder, strongly dependant on the hyperbenthos, on Mysidacea in particular. The absence of a food niche shift in P. lozanoi when no P. minutus are present suggests that present-day competition is unimportant in shaping the food niche segregation observed. |
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