Partitioning of the feeding niche along spatial, seasonal and size dimensions by the fish community in a tropical <scp>B</scp>ay in <scp>S</scp>outheastern <scp>B</scp>razil

Guedes, Ana Paula Penha; Araújo, Francisco Gerson; Pessanha, André Luiz Machado; Milagre, Rosana R.

doi:10.1111/maec.12115

Cited by 28 publications

(21 citation statements)

References 83 publications

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“…These results corroborate Guedes et al (2015), who conducted a study at Sepetiba Bay, Rio de Janeiro, and suggested several factors that promote niche partitioning in that tropical fish community. Some species as Atherinella brasiliensis, Caranx latus, and Centropomus undecimalis had more than one food category playing a fundamental role in their diets.…”

Section: Fish Dietsupporting

confidence: 79%

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Diet and trophic organization of the fish assemblage from the Mamanguape River Estuary, Brazil

Medeiros¹,

Xavier²,

Rosa³

2017

lajar

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ABSTRACT. The present work aims to characterize a fish assemblage from a northeastern Brazilian estuary according to its diet and trophic organization along the estuarine-reef gradient. Sampling was performed at the Mamanguape Estuary, and fishes were collected using three types of nets at seventeen sites, grouped into four regions according to salinity range: reefs and the lower, middle, and upper estuary. The most abundant species were Atherinella brasiliensis, Mugil curema, and Sphoeroides testudineus. The highest species abundance and richness was observed for the lower estuary. Zooplankton was the most consumed category, recorded for fortytwo species. Among the guilds, piscivores were the most abundant, followed by crab eaters. Herbivores, mostly represented by Abudefduf saxatilis, had a higher abundance in reefs, being correlated according to ANOSIM analysis to this region, while piscivores and crab eaters showed a high contribution to inner regions of the Mamanguape Estuary.

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Section: Fish Dietsupporting

confidence: 79%

“…This information may also aid ecosystem management, as it can be used to construct trophic models (Elliott et al, 2002;Dantas et al, 2013) or be ____________________ Corresponding editor: Andrés Abitia applied to studies of trophic ecology that include spatial, seasonal and ontogenetic changes in the diet of species (Guedes et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Diet and trophic organization of the fish assemblage from the Mamanguape River Estuary, Brazil

Medeiros¹,

Xavier²,

Rosa³

2017

lajar

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“… References: 1, Pessanha & Araújo (); 2, Guedes et al. (); 3, Sergipense et al. (); 4, Froese & Pauly (); 5, Zanlorenzi & Chaves (); 6, Chaves & Vendel (); 7, Guedes et al.…”

Section: Resultsmentioning

confidence: 99%

Mangrove habitat use by fishes in Southeastern Brazil: are there temporal changes in the structure of the community?

2016

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We compared fish community structure in Guaratiba Mangrove, SE Brazil, among three seasons of the hydrological cycle [(i) spring, increasing temperature and rainfall, decreasing salinity; (ii) summer/early fall, high temperature and rainfall, intermediate salinity; (iii) late fall/winter, low temperature and rainfall, high salinity] and between the years 2002–2003 and 2008–2009. The aim was to test the hypothesis that the fish community structure changes seasonally, associated with seasonal changes in environmental conditions, and that changes occurred between the two yearly periods because of increased anthropogenic activities. The sampling protocol for the two surveys was identical. A total of 63 species was recorded, with 38 species occurring in 2002–2003, and 53 species in 2008–2009. The main changes in the mangrove's fish assemblage between 2002–2003 and 2008–2009 were (i) an increase in species richness, fish density and total biomass; and (ii) an increase in the zoobenthivorous species of gerreids Eucinostomus argenteus, Diapterus rhombeus and Ulaema lefroyi, and a decrease in the planktivorous clupeid Harengula clupeola. Other abundant species, such as the opportunistic atherinopsid. Atherinella brasiliensis, the detritivorous mullet Mugil liza and the zoobenthivorous pufferfish Sphoeroides testudineus did not differ in abundance between the two yearly periods. Ten species occurred only in 2002–2003, and 23 species only in 2008–2009, indicating significant changes in community structure over the 6‐year period. Seasonal changes in community structure were more conspicuous in 2008–2009, when species abundance and richness were greatest. The highest fish abundance was recorded in spring and in summer/early fall, and the lowest in late fall/winter. The increased abundance and richness over time may be at least partially attributable to protection policies because of the effective implementation of a biological reserve in the area.

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“…On the other hand, G. coropinae is associated with heterogeneous microhabitats with marginal vegetation, crevices or litter bottom. Feeding resources exhibit a patch-like distribution in space (Schoener, 1971), which locally affect food availability and trophic organization (Guedes et al, 2015). Thus, it is commonly expected that the exploration of different microhabitats exposes fish to different food resources.…”

Section: Discussionmentioning

confidence: 99%

Resource use by two electric fishes (Gymnotiformes) of the National Forest Saracá-Taquera, Oriximiná, Pará

et al. 2017

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Fishes of the order Gymnotiformes have high diversity of oral and head morphology, which suggests trophic specializations within each clade. The aim of this study was to describe resource use patterns by two fish species (Gymnorhamphichthys rondoni and Gymnotus coropinae) in the National Forest Saracá-Taquera, Oriximiná -Pará, analyzing microhabitat use, diet composition, feeding strategies, niche breadth and niche overlap. Stomach contents of 101 individuals (41 G. rondoni and 60 G. coropinae), sampled in 23 headwater streams were analyzed and volume of food items was quantified to characterize their feeding ecology. Gymnorhamphichthys rondoni was captured mainly on sandy bottoms, whereas G. coropinae in crevices. Both species had a zoobenthivorous diet and consumed predominantly Sediment/Detritus and Diptera larvae, but also included allochthonous prey in their diet. These species had high niche overlap, with small variations related to the higher consumption of Ceratopogonidae larvae by G. rondoni and of Chironomidae larvae by G. coropinae. Both species had a generalist feeding strategy, but G. coropinae had a broader niche breadth. Our results demonstrate that G. rondoni and G. coropinae occupy different microhabitats but rely on similar food resources.Keywords: Amazon, Diet overlap, Feeding, Microhabitat, Streams.Peixes da ordem Gymnotiformes apresentam alta diversidade morfológica, o que sugere a existência de especializações tróficas dentro dos clados. O objetivo deste estudo foi analisar o uso de recursos por duas espécies de peixes elétricos (Gymnorhamphichthys rondoni e Gymnotus coropinae) na Floresta Nacional Saracá-Taquera, Oriximiná -Pará, analisando o uso de microhabitats, composição da dieta, estratégias alimentares, amplitude de nicho e sobreposição de nicho. Conteúdos estomacais de 101 indivíduos (41 G. rondoni e 60 G. coropinae), capturados em 23 igarapés de cabeceira, foram analisados e quantificados volumetricamente para a caracterização da ecologia trófica. Gymnorhamphichthys rondoni foi registrada principalmente em bancos de areia, enquanto G. coropinae em fendas. Ambas as espécies apresentaram dieta zoobentívora e consumiram predominantemente sedimento/detritos e larvas de Diptera, mas também consumiram presas alóctones. Foi observada alta sobreposição de nicho trófico e a baixa variação encontrada foi relacionada à maior utilização de larvas de Chironomidae por G. rondoni e de larvas de Ceratopogonidae por G. coropinae. Ambas as espécies apresentaram estratégia alimentar generalista, porém G. coropinae apresentou maior amplitude de nicho. Nossos resultados demonstram que G. rondoni e G. coropinae ocupam microhabitats diferentes, mas dependem de recursos alimentares similares.Palavras-chave: Alimentação, Amazônia, Microhabitat, Riachos, Sobreposição de nicho.

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Partitioning of the feeding niche along spatial, seasonal and size dimensions by the fish community in a tropical Bay in Southeastern Brazil

Cited by 28 publications

References 83 publications

Diet and trophic organization of the fish assemblage from the Mamanguape River Estuary, Brazil

Diet and trophic organization of the fish assemblage from the Mamanguape River Estuary, Brazil

Mangrove habitat use by fishes in Southeastern Brazil: are there temporal changes in the structure of the community?

Resource use by two electric fishes (Gymnotiformes) of the National Forest Saracá-Taquera, Oriximiná, Pará

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