Habitat and food resource partitioning among four species of darters (Percidae: Etheostoma) in a southern Ontario stream

1982 ◽  
Vol 60 (7) ◽  
pp. 1635-1641 ◽  
Author(s):  
Michael D. Paine ◽  
Julian J. Dodson ◽  
Geoffrey Power
Keyword(s):  
Relative Abundance ◽  
Resource Partitioning ◽  
Food Resource ◽  
Habitat Utilization ◽  
Foraging Habitat ◽  
Southern Ontario ◽  
Food Partitioning ◽  
Benthic Prey ◽  
Food Resource Partitioning

Resource partitioning among four species of darters (Percidae: Etheostoma) in an Ontario stream was investigated by determining diet and relative abundance in two habitats. The four species partitioned both food and habitat resources. E. caeruleum and E. flabellare dominated the riffles; the former took prey from rock surfaces, the latter took prey from between and beneath rocks. Etheostoma microperca and E. nigrum dominated the weed beds; the former feeding on prey on and around plants, the latter feeding on benthic prey. Diets were closely related to morphology, but habitat utilization was not. Determining the importance of habitat versus food partitioning is difficult, because microhabitat and foraging habitat may be nearly identical.

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.

FOOD PARTITIONING AMONG FISHES IN PAHANG RIVER-ESTUARY, MALAYSIA

2015 ◽  
Vol 77 (25) ◽  
Author(s):  
Azfar, A. M. ◽  
Jalal K. C. A. ◽  
Siti-Waznah, A.
Keyword(s):  
Food Resource ◽  
River Estuary ◽  
Stomach Contents ◽  
Monsoon Period ◽  
Fish Food ◽  
Microbial Decomposition ◽  
Plant Parts ◽  
Food And Feeding ◽  
Food Partitioning ◽  
Food Resource Partitioning

A study was conducted on the food resource partitioning among fish species in Pahang River-estuary from 2010-2013 during pre-monsoon and post-monsoon period. The area was divided in three strata (upstream, downstream and middle zone), based on environmental features. Stomach contents of all species present were analyzed. From 138 of total stomach analyzed, 24 of them were empty and 114 were with food. From the analysis of prey in the stomachs, various kinds of food items consumed by the different size of fishes included phytoplankton, zooplankton, unidentified materials, fish, fish parts, shrimp, shrimp parts, crab, crab parts, plant parts, mollusk and detritus. Detritus consisted of all types of biogenic materials in various stages of microbial decomposition. Different fishes consume different types of food and feeding habit of fishes varies from season to season. From the percentage of number and occurrence of food resources, zooplankton are important in their own right as a major component of fish diets and are especially important to small and young individuals, even for the detrivore. Nevertheless, it represents an important trophic resource for fish food web of Pahang River-estuary.

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