Topological analysis of the ecological importance of elasmobranch fishes: A food web study on the Gulf of Tortugas, Colombia

Navia, Andrés F.; Cortés, Enric; Mejía‐Falla, Paola A.

doi:10.1016/j.ecolmodel.2010.09.006

Cited by 76 publications

(77 citation statements)

References 44 publications

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“…Being top predators makes them important in controlling lower trophic levels (Stevens et al, 2000;Myers et al, 2007;Heithaus et al, 2008;Navia et al, 2010). Thus, the reduction of their populations may result, through trophic cascade effects, in changes in marine populations (Ferretti et al, 2010;Heithaus et al, 2010).…”

Section: Short Communicationmentioning

confidence: 99%

Diet of the bull shark, Carcharhinus leucas, and the tiger shark,Galeocerdo cuvier, in the eastern Pacific Ocean

et al. 2017

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Sharks are apex predators in marine ecosystems and play an important role in regulating prey populations at lower trophic levels (e.g., fish, invertebrates, reptiles, mammals and birds) (Ellis et al., 1996).The bull shark, Carcharhinus leucas (Müller and Henle, 1839), and the tiger shark, Galeocerdo cuvier (Péron and Lesueur, 1822), are common worldwide in tropical and subtropical coastal areas (Compagno, 1984). The bull shark grows to a large size (over 340 cm) (Compagno, 1984) and frequently inhabits shallow water (max. depth 30 m) (Compagno, 1984). It is one of the few shark species that is physiologically capable of spending time in fresh water (Pillans and Franklin, 2004) and has been reported in rivers and lakes (Thorson et al., 1973;Thomerson et al., 1977;Montoya and Thorson, 1982; Simpendorfer et al., 2005). The tolerance of bull sharks for low-salinity conditions allows them to frequent areas close to shore and near river mouths, where they may interact with other shark species (Carlson et al., 2010). The tiger shark reaches a larger size than the bull shark (over 550 cm) (Compagno, 1984), with a wide tolerance for different marine habitats at depths ranging from the surface to 140 m. This species

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Section: Short Communicationmentioning

confidence: 99%

Diet of the bull shark, Carcharhinus leucas, and the tiger shark,Galeocerdo cuvier, in the eastern Pacific Ocean

et al. 2017

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“…Closeness centrality (CC) quantifies how short the minimal paths from a given node to others are (Wasserman and Faust, 1994). The standardized index for a node i (CC i ) is expressed as follows (Navia et al, 2010), see Formula (5). Betweenness centrality (BC) refers to the extent to which other stakeholders rely on the minimum distance between two stakeholders in a network.…”

Section: Centrality Indicesmentioning

confidence: 99%

“…In the early stage, the theory was mostly based on manual computations and drawings; in the 1990s, with the development of computer science, a higher visual degree was achieved and the visual matrix was used to portray the entire system network, enabling the studies not only on individual network properties, but also on full social network properties and the network structures. In the past, most studies concentrated on nondirection binary (Hicks et al, 2013;Navia et al, 2010;Yang and Zou, 2014). Currently, attention is turning to the direction of assignment value study (Buzhdygan et al, 2012;Dell'Apa et al, 2013;Lienert et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…Harary (1969) improved the model by using the conceptual graph including nodes (points) and relationships(lines) between nodes. In recent years, SNA model were applied to study the natural resource management, such as water governance, marine ecosystem and food chains (Navia et al, 2010;Stein et al, 2011;Buzhdygan et al, 2012;Dell'Apa et al, 2013;Hicks et al, 2013), attempting to integrate this sociological tools into the interdisciplinary researches. In the early stage, the theory was mostly based on manual computations and drawings; in the 1990s, with the development of computer science, a higher visual degree was achieved and the visual matrix was used to portray the entire system network, enabling the studies not only on individual network properties, but also on full social network properties and the network structures.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Understanding the mechanism of food waste management by using stakeholder analysis and social network model: An industrial ecology perspective

Zhou

Cao

et al. 2016

Ecological Modelling

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“…Mejía-Falla et al, 2012, 2014aGrijalba-Bendeck et al, 2012;Payán et al, 2011), ecology (e.g. Navia et al, 2007Navia et al, , 2010Navia et al, , 2011López-García et al, 2012;Mejía-Falla et al, 2014b), fisheries (Acevedo et al, 2007;Grijalba-Bendeck et al, 2007), genetics (Hleap et al, 2012), and only Díaz (1984) carried out a zoogeographical study of sharks in the Colombian Pacific. The goal of this manuscript was to investigate zoogeographical patterns of the marine elasmobranch fauna of Colombia, and hypothesize its origin and affinity with other geographic regions.…”

Section: Introductionmentioning

confidence: 99%

Zoogeography of Elasmobranchs in the Colombian Pacific Ocean and Caribbean Sea

Navia¹,

Mejía‐Falla²,

Hleap³

2016

Neotrop. ichthyol.

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In order to investigate zoogeographical patterns of the marine elasmobranch species of Colombia, species richness of the Pacific and Caribbean and their subareas (Coastal Pacific, Oceanic Pacific, Coastal Caribbean, Oceanic Caribbean) was analyzed. The areas shared 10 families, 10 genera and 16 species of sharks, and eight families, three genera and four species of batoids. Carcharhinidae had the highest contribution to shark richness, whereas Rajidae and Urotrygonidae had the greatest contribution to batoid richness in the Caribbean and Pacific, respectively. Most elasmobranchs were associated with benthic and coastal habitats. The similarity analysis allowed the identification of five groups of families, which characterize the elasmobranch richness in both areas. Beta diversity indicated that most species turnover occurred between the Coastal Pacific and the two Caribbean subareas. The difference in species richness and composition between areas may be due to vicariant events such as the emergence of the Isthmus of Panama. It is unlikely that the Colombian elasmobranch diversity originated from a single colonization event. Local diversification/speciation, dispersal from the non-tropical regions of the Americas, a Pacific dispersion and an Atlantic dispersion are origin possibilities without any of them excluding the others.Para conocer los patrones zoogeográficos de los elasmobranquios marinos de Colombia, la riqueza de especies de Pacífico y Caribe y sus subáreas (Pacífico costero, Pacífico oceánico, Caribe costero y Caribe oceánico) fue analizada. Las áreas compartieron 10 familias, 10 géneros y 16 especies de tiburones y ocho familias, tres géneros y cuatro especies de batoideos. Carcharhinidae tuvo la mayor contribución a la riqueza de tiburones mientras que Rajidae y Urotrygonidae tuvieron la mayor contribución a la riqueza de batoideos en el Caribe y el Pacífico, respectivamente. La mayoría de los elasmobranquios estuvieron asociados con hábitats bénticos y costeros. El análisis de similitud permitió la identificación de cinco grupos de familias que caracterizan la riqueza de elasmobranquios en ambas áreas. La diversidad beta indicó que el mayor recambio de especies se produjo entre el Pacífico costero y las dos subáreas del Caribe. La diferencia en la riqueza y composición de especies entre las áreas puede ser debida a eventos vicariantes tales como el surgimiento del Istmo de Panamá. Es poco probable que la diversidad de elasmobranquios en Colombia se originara de un único evento de colonización. Eventos locales de diversificación/especiación, dispersión desde las regiones templadas de América, del Pacífico y del Atlántico son orígenes posibles que no se excluyen entre sí.

show abstract

Topological analysis of the ecological importance of elasmobranch fishes: A food web study on the Gulf of Tortugas, Colombia

Cited by 76 publications

References 44 publications

Diet of the bull shark, Carcharhinus leucas, and the tiger shark,Galeocerdo cuvier, in the eastern Pacific Ocean

Diet of the bull shark, Carcharhinus leucas, and the tiger shark,Galeocerdo cuvier, in the eastern Pacific Ocean

Understanding the mechanism of food waste management by using stakeholder analysis and social network model: An industrial ecology perspective

Zoogeography of Elasmobranchs in the Colombian Pacific Ocean and Caribbean Sea

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