2019
DOI: 10.1590/1982-0224-20180108
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Intraspecific food resource partitioning in Brazilian silverside Atherinella brasiliensis (Atheriniformes: Atherinopsidae) in a tropical estuary, Brazil

Abstract: We investigated the intraspecific partitioning of food resources of the Brazilian silverside Atherinella brasiliensis in a tropical estuary. A total of 1,099 stomachs were analyzed, and the diet consisted mainly of Gastropoda, Ceratopogonidae larvae, Decapoda larvae, Calanoida, Cyclopoida, Hymenoptera and Brachyura. Ordination of the mean volumetric percentage contribution of preys indicated differences in the dietary compositions between sites and size classes. By SIMPER analysis, we detected high dissimilari… Show more

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Cited by 6 publications
(4 citation statements)
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References 51 publications
(59 reference statements)
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“…This change in dietary composition throughout ontogeny could also be a strategy to minimize the overlap of trophic niche between different age groups for E. desantanai. Other studies have reported on the sharing of food resources in fish (Zaret & Rand, 1971;Brito et al, 2019). Therefore, in addition to being influenced by the morphometric characteristics of the organisms, dietary changes throughout ontogeny can also be explained by differences in energy content, as well as by mechanisms to avoid intraspecific competition.…”
Section: Discussionmentioning
confidence: 99%
“…This change in dietary composition throughout ontogeny could also be a strategy to minimize the overlap of trophic niche between different age groups for E. desantanai. Other studies have reported on the sharing of food resources in fish (Zaret & Rand, 1971;Brito et al, 2019). Therefore, in addition to being influenced by the morphometric characteristics of the organisms, dietary changes throughout ontogeny can also be explained by differences in energy content, as well as by mechanisms to avoid intraspecific competition.…”
Section: Discussionmentioning
confidence: 99%
“…[ 83 ]. Zooplankton prey have been found in the gut content of small juveniles of several fish species which take advantage of their availability due to abundance and ease of predation [ 77 ], since small juvenile fishes have low ability to forage and are vulnerable to predation risk [ 84 ].…”
Section: Discussionmentioning
confidence: 99%
“…Similarly, the ontogenetic variation in its diet may be related to changes in the type of prey according to estuarine habitat used and the mouth size; the largest fish fed mainly on other fish, anomuran crustaceans and shrimps near the mangrove fringe, whereas smaller fish fed mainly on harpacticoid copepods near mangrove roots (Sandoval et al ., 2014). This decreasing intraspecific competition between small and large individuals is observed in catfish (Dantas et al ., 2013) and other estuarine fish (Brito et al ., 2019).…”
Section: Discussionmentioning
confidence: 99%