Comparisons between the influence of habitat type, season and body size on the dietary compositions of fish species in nearshore marine waters

Schafer, L.N.; Platell, M. E.; Valesini, F.J.; Potter, I. C.

doi:10.1016/s0022-0981(02)00337-4

Cited by 81 publications

(71 citation statements)

References 32 publications

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“…The IP values were square root transformed and converted into a triangular matrix of similarities among all samples using the Bray-Curtis similarity (Schafer et al 2002). This similarity measure was used due to low number of samples and because the influence of the dominant species/feeding items in diet patterns (Krebs 1989).…”

Section: Discussionmentioning

confidence: 99%

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

Garcia¹,

Vendel²

2016

Gaia Sci.

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-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. Resumen -La sobreposición alimentaria y la división del alimento fueron estudiados entre nueve especies de peces carnívoros capturados en aguas someras del río Paraíba do Norte, Paraíba, Brasil. Los peces fueron colectados con red de arrastre de playa entre enero y diciembre del 2008. En total, fueron analizados 958 estómagos. Crustacea fue el recurso alimentario dominante para Lutjanus alexandrei, L. jocu y Bathygobius soporator, mientras que Telostei fue consumido principalmente por Centropomus undecimalis y C. parallelus. En contraste, Polychaeta fue predado principalmente por Diapterus rhombeus, Eucinostomus argenteus, Sciades herzbergi y S. parkeri. A pesar de que la mayoría de las especies consuma ítems alimentarios similares, éstos son consumidos en proporciones y cantidades diferentes. En general, la sobreposición del nicho entre las especies fue baja (< 0.60), sin embargo, se observó sobreposición de nicho alimentario para dos especies en varios casos (entre 0.72 y 0.97). Estos resultados corroboran la hipótesis de que el particionamiento de recursos alimentares determina la coexistencia de especies en ambientes tropicales estuarios.

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Section: Discussionmentioning

confidence: 99%

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

Garcia¹,

Vendel²

2016

Gaia Sci.

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“…L. elongata were grouped into eight body length classes, (70-89 mm, 90-109 mm, 110-129 mm, 130-149 mm, 150-169 mm, 170-189 mm, 190-209 mm, and 210-229 mm), where selection was based on available stomach contents data. Unidentifiable food items were excluded from further analysis (Schafer et al 2002).…”

Section: Stomach Content Analysismentioning

confidence: 99%

Diet of Leptobotia elongata revealed by stomach content analysis and inferred from stable isotope signatures

et al. 2015

Environ Biol Fish

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The diet of Leptobotia elongata in the Yibin reach of the Yangtze River, China was investigated by stomach content analysis and by stable isotope analysis from muscle. The results of the two methods were agreement. Both stomach contents and isotope analysis indicated that L. elongata fed in spring mainly on plankton, shrimp and fish, and secondarily on benthic invertebrates and aquatic insect larvae. For the stomach content analysis, the diet composition showed significant differences among the size classes in relative weight of prey items, with L. elongata changing feeding habits at c.110 mm standard length. The smaller individuals fed on benthic invertebrates and aquatic insect larvae, whereas individuals >109 mm fed mainly on shrimp and fish. A similar shift to piscivory at c.110 mm standard length was found using the stable isotope mixing model to reveal dietary ontogeny by IsoSource software, and the trend in variation of the δ

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“…Unidentified items were not included, as welldigested stomach contents may bias results. Unidentifiable material may contain remnants of 1 or more dietary categories and thus make it difficult to obtain reliable counts of certain prey items if they are included (Schafer et al 2002). Furthermore, unidentified material was present in all categories, and the amounts were rather similar among all categories (25 to 39% of estimated volume) except for subadult (18% of estimated volume) and adult (10% of estimated volume) L. fulviflamma from seagrass/coral areas.…”

Section: Diet Similarity Between Speciesmentioning

confidence: 99%

Ecological connectivity and niche differentiation between two closely related fish species in the mangrove-seagrass-coral reef continuum

Berkström¹,

Jörgensen²,

Hellström³

2013

Mar. Ecol. Prog. Ser.

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Comparisons between the influence of habitat type, season and body size on the dietary compositions of fish species in nearshore marine waters

Cited by 81 publications

References 32 publications

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

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

Diet of Leptobotia elongata revealed by stomach content analysis and inferred from stable isotope signatures

Ecological connectivity and niche differentiation between two closely related fish species in the mangrove-seagrass-coral reef continuum

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