Trophic levels of fish species of commercial importance in the Colombian Caribbean

García, Camilo; Contreras, Clementina Infante

doi:10.15517/rbt.v0i0.3391

Cited by 11 publications

(9 citation statements)

References 9 publications

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“…In addition to the general description of the trophic levels, we found that the trophic level had a positive increase with body size (Pauly, Trites, Capuli, & Christensen, ). Similar to previous studies conducted in the Mediterranean Sea (Stergiou & Karpouzi, ) and the Colombian Caribbean (García & Contreras, ), the trophic level showed a positive correlation with body length. Because of the different types of feeding habits, most fishes feed on a variety of trophic levels, leading to a close relationship between the food chains.…”

Section: Discussionsupporting

confidence: 89%

Trophic levels of teleost and elasmobranch species in the Persian Gulf and Oman Sea

Rastgoo

Navarro

2016

J Appl Ichthyol

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Summary Knowing the trophic level of marine organisms is essential to understanding their ecological role in the ecosystem and for quantifying the ecosystem effects of fishing to establish effective management of fishing resources. In comparison to other systems, information about the trophic level of marine organisms in the Persian Gulf and Oman Sea is very scarce. Here, the main aim was to estimate trophic level in these areas using all available diet information from different marine species using TrophLab software. The trophic level of 32 fish species was estimated with the available diet data. The trophic level ranged from 2.28 to 4.50. High trophic levels were found for Chorocentrus nudus (TL = 4.7), Saurida tumbil (TL = 4.6), Rhizoprionodon acutus (TL = 4.5), Torpedo sinuspersici (TL=4.5), Gymnura poecilura (TL = 4.5), Sphyraena putnamae (TL = 4.5) and Euthynnus affinis (TL = 4.5). In contrast, lower trophic levels were estimated for Tenualosa ilisha (TL = 2.28) and Sardinella sindensis (TL = 2.92). As expected, a positive correlation was found between the trophic level and body size, indicating changes in the diet due to variations in predatory capacities. The results of this study may be useful in the formulation of trophic indicators and modelling of the ecosystems.

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Section: Discussionsupporting

confidence: 89%

Trophic levels of teleost and elasmobranch species in the Persian Gulf and Oman Sea

Rastgoo

Navarro

2016

J Appl Ichthyol

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“…Two rhinobatids [ R. productus and Rhinobatos percellens ] had T L values ranging between 3·6 and 3·7 according to stomach content data (F. Valenzuela‐Quiñonez, unpubl. data; Bornatowski et al, ; García & Contreras, ). Other studies reported T L values of 3·6–4·2, using stable‐isotope analysis (F. Valenzuela‐Quiñonez, unpubl.…”

Section: Discussionmentioning

confidence: 93%

“…There are very few estimates of the trophic level of guitarfishes, especially in the Mexican Pacific and GC, because these species do not have great commercial importance. This study calculated the trophic level using stomach content data, which is widely used for elasmobranchs in general (Cortés, , ; Ebert & Bizarro, ; Navia et al, ; García & Contreras, ; López‐García et al, ; Bornatowski et al, 2014 a , b ), resulting in T L values of c . 3·6.…”

Section: Discussionmentioning

confidence: 99%

Feeding habits of the speckled guitarfish Rhinobatos glaucostigma (Elasmobranchii: Rhinobatidae)

Lara‐Mendoza

Márquez‐Farías

Román‐Reyes

2015

Journal of Fish Biology

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The stomachs of 464 speckled guitarfish Rhinobatos glaucostigma were sampled from the south-eastern Gulf of California (GC) to determine diet composition. Numerical indices and prey-specific index of relative importance ((%I)PSIR ) were used to determine the feeding strategy of the species. An analysis of similarity (ANOSIM) was used to determine differences in diet with respect to sex, season (dry or rainy) and maturity stages (immature or mature). The diversity and niche breadth (by sex, season and maturity) and a general trophic level were determined. The overall diet was dominated by shrimps ((%I)PSIR = 43.47), amphipods ((%I)PSIR = 18.89) and crabs ((%I)PSIR = 18.07). ANOSIM demonstrated differences in the diet by maturity and season, but not by sex. Rainy and dry season diets were dominated by shrimps and amphipods, respectively. Immature specimens fed mainly on amphipods, whereas mature fish preferred shrimps and crabs. Rhinobatos glaucostigma showed a narrow niche breadth with an intermediary trophic level (TL = 3.72) and can be considered as a secondary consumer in the soft-bottom demersal community of the south-east GC. Understanding the feeding habits and trophic level of R. glaucostigma is vital to help identify the segments of the population vulnerable to overfishing by artisanal and industrial fisheries, and to aid in conservation and management of this elasmobranch.

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“…The weighted average of the trophic level (Rochet and Trenkel 2003) of landings was used as a functional indicator to measure the impact of the artisanal set gill net fishery on demersal fish assemblages. The trophic level of each taxon was obtained from data reported by García and Contreras (2011) and the Fishbase dataset (Froese and Pauly 2017).…”

Section: Determination Of Functional and Fisheries Indicatorsmentioning

confidence: 99%

Short-term changes in demersal fish assemblages exploited by an artisanal set gill net fishery in the Caribbean Sea (Colombia)

Salazar-Pérez¹,

Choles-Rodríguez²,

Manjarrés-Martínez³

2020

Cienc. Mar.

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A basic input for implementing ecosystem-based management measures is the knowledge on fish assemblages exploited by multispecies fisheries, such as the set gill net artisanal fishery in the Gulf of Salamanca (GoS), Caribbean Sea (Colombia), which catches a large number of high-value demersal species. Assemblages of this type were identified in this study, and significant differences (P < 0.01) between sampling periods (2008 and 2013) and seasons were found by means of a two-way permutational multivariate analysis of variance. These results were consistent with those obtained with the principal coordinates analysis, indicating the occurrence of short-term structural changes in these assemblages. Interannual and seasonal variations in discriminant and typifying species were also identified using similarity percentages, and a decreasing trend in landing per unit effort was established by the bootstrap method. On the other hand, both the geographic location of the fishing grounds and the characterization of historical changes in the set gill nets used in the GoS were determined using the traditional ecological knowledge of local fishermen, who reported a decrease in mesh sizes. In conclusion, temporal variations could be related to changes in the gill nets, the fishing trip schedules, and the spatial distribution of fishing effort, all which occurred in response to the decrease in catch rates in traditional fishing grounds.

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Trophic levels of fish species of commercial importance in the Colombian Caribbean

Cited by 11 publications

References 9 publications

Trophic levels of teleost and elasmobranch species in the Persian Gulf and Oman Sea

Trophic levels of teleost and elasmobranch species in the Persian Gulf and Oman Sea

Feeding habits of the speckled guitarfish Rhinobatos glaucostigma (Elasmobranchii: Rhinobatidae)

Short-term changes in demersal fish assemblages exploited by an artisanal set gill net fishery in the Caribbean Sea (Colombia)

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