caa a22 4500 477115926 CHVBK 20180405111622.0 cr unu---uuuuu 170330e19960101xx s 000 0 eng 10.1007/BF00000627 doi (NATIONALLICENCE)springer-10.1007/BF00000627 The role of trophic bottlenecks in stunting: a field test of an allocation model of growth and reproduction in yellow perch, Perca flavescens [Elektronische Daten] [Daniel Heath, Derek Roff] Synopsis: Stunting in freshwater fish populations may be due to low availability of one or more prey components within their diet. If the limiting prey constitute a trophic level (i.e. zooplankton, benthos, or fish), we define the phenomenon as a trophic bottleneck. Growth of a non-stunted population of yellow perch, Perca flavescens, was simulated using an allocation model based on reported ontogenetic shifts in diet (planktivory to benthivory to piscivory). The model was then perturbed by limiting the available ration individually for each of the three feeding types. The resulting simulated growth curves all reflected lower growth rates than the unperturbed state and the shape of the curve differed between the limited food types. Only the reduced benthic ration produced a simulated growth that matched that observed for the stunted yellow perch of Lac Hertel (Québec). To test the hypothesis that benthic ration was limiting growth in Lac Hertel, all the fish species in the lake were sampled for diet composition and total length at age. We predicted that species feeding upon benthic invertebrates should exhibit the slow growth characteristic of stunting (based on the results of the allocation model). Of the seven fish species found in Lac Hertel, four were stunted: yellow perch, pumpkinseed, Lepomis gibbosus, rock bass, Ambloplites rupestris, and brown bullhead, Ictalurus nebulosus. Three species were non-stunted: northern pike, Esox lucius, golden shiner, Notemigonus crysoleucas, and white sucker, Catostomus commersoni. All stunted species fed on benthic invertebrates and all non-stunted species, except the white sucker, did not feed upon benthos. The prediction of the allocation model was thus supported. Kluwer Academic Publishers, 1996 Benthic prey nationallicence Ration limitation nationallicence Computer simulation nationallicence Diet nationallicence Fish nationallicence Heath Daniel Department of Biology, McGill University, 1205 Avenue Dr. Penfield, H3A 1B1, Montreal, Quebec, Canada aut Roff Derek Department of Biology, McGill University, 1205 Avenue Dr. Penfield, H3A 1B1, Montreal, Quebec, Canada aut Environmental Biology of Fishes Kluwer Academic Publishers 45/1(1996-01-01), 53-63 0378-1909 45:1<53 1996 45 10641 https://doi.org/10.1007/BF00000627 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00000627 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Heath Daniel Department of Biology, McGill University, 1205 Avenue Dr. Penfield, H3A 1B1, Montreal, Quebec, Canada aut NATIONALLICENCE 700 1- Roff Derek Department of Biology, McGill University, 1205 Avenue Dr. Penfield, H3A 1B1, Montreal, Quebec, Canada aut NATIONALLICENCE 773 0- Environmental Biology of Fishes Kluwer Academic Publishers 45/1(1996-01-01), 53-63 0378-1909 45:1<53 1996 45 10641 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer