Seasonal diet of Salmo trutta macrostigma in a mountain stream (Ifrane Morocco)

The diet of salmo trutta macrostigma in Sidi Rachid wadi was conducted on 94 individual ranging in weight from 3 to 575 g with a mean of 110.38 g and a standard deviation of 112.94. Crustaceans mainly characterize the annual food spectrum and insects constitute more than 98%. The study of the variations of the diet spectrum shows that the nature and the importance in number of the ingested items of prey change according to the seasons, with an important relative predominance of crustaceans during all the seasons except winter when insects are the more important food source. In addition, the different taxa can be classified into two categories, a first group of preys always present in the stomach contents during all seasons and whose relative abundance is generally high, and a second group whose presence in the stomach contents was limited to one or two seasons. The most commonly used taxa are amphipoda, Ephemeroptera, and Diptera, with these three taxa forming at least 77% in summer and 90% in winter.

[1]  Cemil Kara.  Feeding Habits and Diet Composition of Brown Trout (Salmo trutta) in the Upper Streams of River Ceyhan and River Euphrates in Turkey , 2005 .

[2]  M. Vandeputte,et al.  Quelle gestion genetique de la domestication chez les poissons , 2004 .

[3]  J. Thomson,et al.  Local modification of benthic flow environments by suspension-feeding stream insects , 2004, Oecologia.

[4]  T. Boujard,et al.  Regulation of feed intake, growth, nutrient and energy utilisation in European sea bass (Dicentrarchus labrax) fed high fat diets , 2004 .

[5]  Pascal Fontaine,et al.  Size heterogeneity, cannibalism and competition in cultured predatory fish larvae: biotic and abiotic influences , 2003 .

[6]  P. Giller,et al.  The influence of small-scale variation in habitat on winter trout distribution and diet in an afforested catchment , 2001, Aquatic Ecology.

[7]  M. Ladle.  Biology and ecology of the Brown and Sea Trout , 2000 .

[8]  C. Macneil,et al.  Factors influencing the importance of Gammarus spp. (Crustacea : Amphipoda) in riverine salmonid diets , 2000 .

[9]  D. Noakes,et al.  Living with failure : the prey capture success of young brook charr in streams , 2000 .

[10]  D. Hart,et al.  PHYSICAL-BIOLOGICAL COUPLING IN STREAMS: The Pervasive Effects of Flow on Benthic Organisms , 1999 .

[11]  G. Chelazzi,et al.  Foraging interactions among three benthic fish in a Posidonia oceanica reef lagoon along the Tyrrhenian Coast , 1999 .

[12]  R. Rader.  A functional classification of the drift: traits that influence invertebrate availability to salmonids , 1997 .

[13]  M. Power,et al.  Effects of Disturbance on River Food Webs , 1996, Science.

[14]  A. Sih,et al.  Prey Behavior, Prey Dispersal, and Predator Impacts on Stream Prey , 1994 .

[15]  R. Hughes,et al.  Factors affecting the behavioural mechanisms of diet selection in fishes , 1993 .

[16]  D. Williams,et al.  Relationship between Diurnal Activity Patterns, Cryptic Coloration, and Subsequent Avoidance of Predaceous Fish by Perlid Stoneflies , 1992 .

[17]  L. Crowder,et al.  Predation: direct and indirect impacts on aquatic communities , 1988 .

[18]  C. Otto.  Adaptive head coloration in case‐making caddis larvae , 1984 .

[19]  C. Otto,et al.  Cerci as antipredatory attributes in stonefly nymphs , 1983 .

[20]  T. Northcote,et al.  Selection by Young Rainbow Trout (Salmo gairdneri) in Simulated Stream Environments For Live and Dead Prey of Different Sizes , 1983 .

[21]  D. Ware.  Risk of Epibenthic Prey to Predation by Rainbow Trout (Salmo gairdneri) , 1973 .

[22]  A. Ruiz-Navarro,et al.  The population structure, age and growth of Luciobarbus callensis (Cyprinidae) in a man-made lake in the Maghreb (NE Algeria) , 2013 .

[23]  S. Bektaş,et al.  The diet of the brown trout (Salmo trutta L.) in different streams of River Coruh in Turkey , 2011 .

[24]  T. Ruginis.  Diet and Prey Selectivity by Age-0 Brown Trout (Salmo Trutta L.) in Different Lowland Streams of Lithuania , 2008 .

[25]  G. Gourène,et al.  Habitudes alimentaires de Brycinus longipinnis dans le complexe fluvio-lacustre de la Bia, Côte d'Ivoire , 2007 .

[26]  A. Crivelli,et al.  L'ICHTYOFAUNE DES EAUX CONTINENTALES DU MAROC , 2000 .

[27]  J. Bagliniere,et al.  La croissance de la truite commune (Salmo trutta L.) sur le bassin de Scorff , 1990 .

[28]  E. Rosecchi,et al.  COMPARAISON DE CINQ INDICES ALIMENTAIRES UTILISÉS DANS L'ANALYSE DES CONTENUS STOMACAUX , 1985 .

[29]  A. Neveu,et al.  COMPORTEMENT ALIMENTAIRE D'UNE POPULATION SAUVAGE DE TRUITES FARIO (SALMO TRUTTA L.) DANS UN RUISSEAU DES PYRENEES ATLANTIQUES, LE LISSURAGA. , 1977 .