Ontogenetic food resource partitioning and feeding strategy in claroteid catfish, Clarotes laticeps in the lower River Niger

2017 ◽  
Vol 31 (2A) ◽  
pp. 283
Author(s):  
P.A. Ekokotu
Keyword(s):  
Resource Partitioning ◽  
Feeding Strategy ◽  
Food Resource ◽  
River Niger ◽  
Food Resource Partitioning

Feeding Strategies and Partition of Food Resources in Deep-Water Decapod Crustaceans (400–2300 m)

1998 ◽  
Vol 78 (2) ◽  
pp. 509-524 ◽  
Author(s):  
Joan E. Cartes
Keyword(s):  
Resource Partitioning ◽  
Feeding Strategy ◽  
Food Resource ◽  
Progressive Increase ◽  
Western Mediterranean ◽  
Food Resources ◽  
Feeding Strategies ◽  
Dietary Overlap ◽  
Decapod Crustaceans ◽  
Food Resource Partitioning

Food resource partitioning and trends in feeding strategies were examined in 3882 individual decapod crustaceans collected from 1989 to 1990, using bottom trawls at depths between 380 and 2261 m in the Catalan Sea (western Mediterranean). The vertical distribution of available food resources near the bottom was the most important factor responsible for food resource partitioning among bathyal decapod crustaceans by depth stratum and season. Decapods were assigned to five different trophic groups according to the food resource exploited and feeding strategy employed (macroplankton feeders, macroplankton-epibenthic feeders, epibenthic feeders, epibenthic-endobenthic feeders, and deposit feeders). There was little dietary overlap, indicating that species did partition the available resources. Overall, dietary overlap values among species increased with depth. Although a trend to increase H’ values for diets with depth was observed, this was not significant (P < 0.10), whereas differences in the percentage of empty stomachs and the frequency of foraminiferans and pteropods in the foreguts increased significantly (P < 0.05) with depth. This last result is indicative of a progressive increase in the importance of deposit feeding in decapod crustaceans as depth increases.

Dietary overlap and food resource partitioning among fish species of a tropical estuary in Northeastern Brazil

Gaia Scientia ◽  
2016 ◽  
Vol 10 (4) ◽  
pp. 86-95 ◽  
Author(s):  
Adna Ferreira da Silva Garcia ◽  
Ana Lúcia Vendel
Keyword(s):  
Resource Partitioning ◽  
Species Coexistence ◽  
Food Resource ◽  
River Estuary ◽  
Niche Overlap ◽  
Northeastern Brazil ◽  
Dietary Overlap ◽  
Feeding Niche ◽  
Tropical Environments ◽  
Food Resource Partitioning

The current work investigates dietary overlap and food partitioning among nine abundant carnivorous fishes caught in the shallow waters of the Paraíba do Norte river estuary, Paraíba State, Brazil. Fishes were sampled with a beach seine net between January and December 2008 and a total of 958 specimens had their stomach content analyzed. Crustacea was the dominant food resource for Lutjanus alexandrei, L. jocu and Bathygobius soporator, whereas Telostei were consumed mainly by Centropomus undecimalis and C. parallelus. In contrast, Polychaeta were preyed upon mainly by Diapterus rhombeus, Eucinostomus argenteus, Sciades herzbergii and S. parkeri. Although most species consumed similar food items, they did that in varying proportions and amounts. Overall, the niche overlap among species was low (< 0.60), but there were several cases where pair of species had their feeding niche highly overlapped (between 0.72 and 0.97). These findings corroborate the hypothesis that food resource partitioning determines species coexistence in estuarine tropical environments.

scholarly journals Diet of two sit-and-wait lizards, Phyllopezus pollicaris (Spix, 1825) (Phyllodactylidae) and Hemidactylus mabouia (Moreau de Jonnès, 1818) (Gekkonidae) in a perianthropic area of Mato Grosso do Sul, western Brazil

2013 ◽  
Vol 13 (4) ◽  
pp. 376-381 ◽  
Author(s):  
Nelson Rufino de Albuquerque ◽  
Arianna da Silva Costa-Urquiza ◽  
Michelly Pereira Soares ◽  
Ledilene Saucedo Alves ◽  
Marcus Vinícius Santiago Urquiza
Keyword(s):  
Resource Partitioning ◽  
Food Resource ◽  
Lizard Species ◽  
Mato Grosso ◽  
Rocky Substrate ◽  
Family Level ◽  
Hemidactylus Mabouia ◽  
Mato Grosso Do Sul ◽  
Prey Items ◽  
Food Resource Partitioning

The dietary compositions of two sit-and-wait lizard species, Hemidactylus mabouia and Phyllopezus pollicaris, which co-occur over rocky substrate and vertical rock walls in a perianthropic area of western Brazil, were described. Both species showed a generalist feeding pattern, feeding mainly on insects. The most frequent prey items in the diet of P. pollicaris were Coleoptera, Araneae and Homoptera whereas the most important were Coleoptera and Homoptera, respectively. For H. mabouia the most frequent prey items were Araneae followed by Coleopterae and Hemiptera, whereas the most important items were H. mabouia followed by Formicidae and Hemiptera. Our identification into broader prey-types categories (i.e., order or family-level) suggests that some degree of food resource partitioning may occur, possibly through the occupation of different temporal niches.

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