Trophic organisation and predator–prey interactions among commercially exploited demersal finfishes in the coastal waters of the southeastern Arabian Sea

Abdurahiman, K P; Nayak, T H; Zacharia, P U; Mohamed, K S

doi:10.1016/j.ecss.2010.03.002

Cited by 37 publications

(24 citation statements)

References 30 publications

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“…This fluidity among guilds exists because ecological interactions among species are intensified at certain periods, with the less competitive species or species more susceptible to predation being excluded or replaced by species with greater adaptability to environmental pressures (ARAÚJO et al, 2006). Although ontogenetic changes were not specifically examined in the present study, some authors have asserted that certain species may segregate into different guilds during growth (LEGUERRIERA et al, 2007;ABDURAHIMAN et al, 2010). Autochthonous prey items, represented primarily by zooplankton and, in particular, by copepods, are of fundamental importance for juveniles.…”

Section: Discussionmentioning

confidence: 88%

“…Although the IRI may not be a good index, as pointed out by MACDONALD and GREEN (1983), it was used in this paper because IRI has often been used in other studies on stomach contents and it facilitates comparison with the results of other studies (BARRY et al, 1996). For items that cannot be counted, a value of 0.1 was given for their number (%N) when they were present in the diet, to offset distortions in the index (ABDURAHIMAN et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

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Trophic relationships among fish assemblages on a mudflat within a Brazilian Marine protected area

et al. 2015

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Trophic relationships among fish assemblages on a mudflat within a Brazilian Marine protected areaThe present study deals with the temporal variations in diet and the trophic guilds of dominant fish species on a tidal mudflat during the dry and rainy seasons. We sought to classify the diet composition of 17 species in the Mamanguape river estuary, northeastern Brazil, identifying the dominant food components and evaluating the effects of seasonality on the guild organization. Diets varied little between species and seasons, though they seemed to be more heterogeneous during the rainy season. Five primary feeding guilds were identified, in accordance with the importance of prey in the diets: (1) Detritivore, (2) Zooplanktivore, (3) Zoobenthivore-epifaune, (4) Zoobenthivore-infaune, and (5) Piscivore. Most fishes fed on a diverse range of food items but relied heavily on zooplankton prey. Several fish species showed a tendency to a specialised diet, with almost all species showing some degree of opportunistic feeding. A high degree of diet overlap was found among some species; however, the presence of exploitative competition could not be determined. AbstrActZooplanctívora, (3) Zoobentívora-epifauna, (4) Zoobentívora-infauna, e (5) Piscivora. A maioria dos peixes predou uma variada gama de itens alimentares, mas fortemente baseados em presas do zooplâncton. Alguns peixes apresentaram tendência para uma dieta especializada, com quase todas as espécies mostrando algum grau de alimentação oportunista. Um alto grau de sobreposição de dieta foi encontrado entre as espécies; no entanto, a ocorrência de competição por exploração não foi observada. resumoDescritores: Dieta, Ecologia alimentar, Comunidades de peixes, Sobreposição alimentar, Estuário.

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Section: Discussionmentioning

confidence: 88%

Section: Discussionmentioning

confidence: 99%

Trophic relationships among fish assemblages on a mudflat within a Brazilian Marine protected area

et al. 2015

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“…The higher consumption of such preys is presumably related to their availability in the estuary and often within the mangrove canopy. The dominance of carnivorous over other groups has been reported in estuaries in temperate latitudes (Sá et al 2006), in Caribbean mangroves (McDonald et al 2009) and in demersal fish assemblages of coastal areas (Abdurahiman et al 2010).…”

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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“…Low SST favours the reproduction of Squilla, which have a high affinity towards nutrients in the water. Squilla are a major prey in the trophic guild (where fishes are grouped on the basis of feed similarity) of demersal fishes in the south-eastern Arabian Sea (Abdurahiman et al, 2010) and therefore, Squilla forms a major group in the trophic network in the ecosystem. Squilla found in the trawling grounds can be considered as fishery indicator of a region because ecosystem status indicators often consist of species with common properties, such as foraging guild membership and spatial distribution (Fulton et al, 2005).…”

Section: Discussionmentioning

confidence: 99%

“…In this study, copepods were the dominant group of zooplankton and the major group that contributed to seasonal similarity. Copepod is a prey that highly influences its predators in the coastal waters of the south-eastern Arabian Sea (Abdurahiman et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

Environmental influence on the secondary productivity and fish abundance in coastal fishing grounds off Mangalore, south-eastern Arabian Sea

et al. 2016

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Environmental parameters influence the productivity and abundance of fish in marine ecosystems. In this study, we attempted to analyse the relationship between environmental parameters and abundance of fish in trawling grounds in south-eastern Arabian Sea along the coast of Karnataka. Among the 85 species of finfishes and shellfishes caught in the trawling grounds, 41 finfish species, 24 crustaceans, 18 molluscs and two echinoderms were recorded. Seasonal differences were seen in biomass with the highest biomass during the post-monsoon period (October-January). Water temperature and nutrients were the key contributing factors of seasonal differences in the biotic communities studied. Season specific diagnostic species were identified using SIMPER analysis. Squilla which formed the major prey item of most of the demersal fishes dominated (>40%) coastal grounds throughout all seasons. This could be considered as a fishery indicator of the region. The dominance and abundance of copepods was found to be influenced by sea surface temperature (SST) and nutrients. The results of the study have implications on the fishery, knowledge on environmental factors influencing the abundance and importance of non-commercial species in sustaining the fishery in the region.

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Trophic organisation and predator–prey interactions among commercially exploited demersal finfishes in the coastal waters of the southeastern Arabian Sea

Cited by 37 publications

References 30 publications

Trophic relationships among fish assemblages on a mudflat within a Brazilian Marine protected area

Trophic relationships among fish assemblages on a mudflat within a Brazilian Marine protected area

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

Environmental influence on the secondary productivity and fish abundance in coastal fishing grounds off Mangalore, south-eastern Arabian Sea

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