Size overlap in intertidal decapod communities along the chilean coast

Ríos-Escalante, Patricio De los; Figueroa-Muñoz, Guillermo; Retamal, Marco A.; Vega-Aguayo, Rolando; Esse, Carlos

doi:10.3989/scimar.04973.14a

Cited by 3 publications

(11 citation statements)

References 9 publications

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“…The exposed results revealed that presence of C. cinereus in sites included in the present study agree with classic literature on biogeography of this species in continental Chilean coast (2,3,7). The presence of negative binomial distribution in many of studied sites would agree with first literature descriptions for this species for rocky shores in central Chile that mentioned that this species join groups that alive under rounded rocks in intertidal zone (6), similar pattern was reported for Petrolisthes granulosus in central Chile (5), it remarks that both species can coexists along continental Chilean rocky shore (2, 5, 6, 7), nevertheless, these references did not mention density quantitative data.…”

Section: Discussionsupporting

confidence: 92%

“…This pattern was reported for inland water crustaceans in Chilean Patagonia (24,26), for intertidal invertebrates in northern Patagonian coast (27), and the gastropod Echinolittorina peruviana in Antofagasta rocky shore (12). The existence of uniform distribution in four of 19 samples probably would be to interspecific interactions, probably competence with other species that share ecological niche (5,6,7).…”

Section: Discussionmentioning

confidence: 99%

“…In rocky shores there are many environmental heterogeneity due the irregular characteristics of substrate, that has creeks, or presence of rounded rocks that allow the presence of microenvironments that can sustain high invertebrate species richness such as was observed in first studies for central Chilean rocky shore [5,6], and in recent studies along continental Chilean territory [7]. The ecological importance of these species is their role of detritivores (vegetal and animal dead matter) as well as prey for littoral rocky fishes, sea birds or other large crabs [5,6,8].…”

Section: Introductionmentioning

confidence: 99%

“…The ecological importance of these species is their role of detritivores (vegetal and animal dead matter) as well as prey for littoral rocky fishes, sea birds or other large crabs [5,6,8]. Within the species reported are decapods such as Grapsid crabs that inhabits in creeks, whereas under rounded rocks, inhabits small crabs such as Cyclograpsus cinereus Dana, 1851, Petrolisthes granulosus (Guerin, 1835) or P. violaceous (Guerin, 1830) [2,5,6,7].…”

Section: Introductionmentioning

confidence: 99%

“…The species C. cinereus is widespread along continental Chilean and Peruvian coast [2,5,7,9], and Chilean oceanic islands [2,10,11]. This species inhabits mainly under rounded rocks, being an important component in rocky shores in continental Chile, alternating its dominance with porcellanid crabs based on evidence in central Chile [2,5,6].…”

Section: Introductionmentioning

confidence: 99%

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Spatial Distribution of <em>Cyclograpsus cinereus</em> Dana 1851 in Rocky Shores of Antofagasta (23º27’ S, Chile)

Ríos¹,

Esse²,

Retamal³

et al. 2022

Preprint

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The decapod fauna in intertidal rocky shore in continental Chile has high species diversity mainly in northern and central Chile due high productivity of these coast due influence of cold Humboldt stream. One of the abundant species in these ecosystems is decapod Cyclograpsus cinereus Dana, 1851. The aim of the present study was determine the spatial distribution pattern of C. cinereus along rocky shore in Antofagasta bay, north of Chile between spring and summer 2018-2020. Data was obtained counting individuals from random quadrants in intertidal zones, to the obtained data was applied the variance mean ratio for determine if the specimens have random, aggregate or uniform distribution, that are associated to Poisson, negative binomial or positive binomial distributions respectively. Data obtained revealed the existence of associated distribution with respective negative binomial distribution pattern in 16 observations, and uniform distribution for 3 observations. The sites corresponds to rocky shores in urban zones, and in a protected zone, and the density does not have significant differences for both kind of sites. The observed data about aggregated pattern agree with observations for decapods for rocky shore in central and southern Chile, specifically in interpretative probabilistic models.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Spatial Distribution of <em>Cyclograpsus cinereus</em> Dana 1851 in Rocky Shores of Antofagasta (23º27’ S, Chile)

Ríos¹,

Esse²,

Retamal³

et al. 2022

Preprint

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Null models to explain highly diverse community of intertidal decapods on a temperate rocky coast in Antofagasta, northern Chile (23º27ʹS)

De los Ríos-Escalante,

Ibáñez-Arancibia,

Esse

et al. 2023

Journal of Crustacean Biology

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The decapod fauna on intertidal shores in northern Chile is characterized by its relatively high diversity and abundance due to the presence of continuous upwelling by the Humboldt Current, which results in a high productivity. The decapod fauna on intertidal rocky shores is characterized by coexisting species that inhabits in natural shelters such as cracks and eroded rocks, as well as among macroalgae. We aimed to monitor the brachyuran and anomuran (porcellanid) crabs in three intertidal sites during two periods of time in September-December 2019 in the Antofagasta region, one site without human intervention and two sites in the city of Antofagasta, for which we applied null models in ecology. We assumed that the communities are random, a viewpoint that is more robust because it reduces the risk of error type I. The results of the application of null models on the co-occurrence species revealed that species associations are mainly structured for all sites, whereas the niche-sharing null model revealed that the reported species did not share ecological niches and in consequence there is not interspecific competition. The results would probably indicate that the species of intertidal decapods have a micro-specific ecological-niche differentiation, which would explain the existence of structured pattern in species associations. The results were compared with information for other sites along the continental Chilean coast.

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Spatial Distribution of Cyclograpsus cinereus Dana 1851 on the Rocky Shores of Antofagasta (23°27′ S, Chile)

et al. 2022

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The decapod fauna in the intertidal zone of the rocky shores of Chile is highly diverse, especially along the northern and central mainland coasts, where the influence of the cold Humboldt Current results in high productivity. One of the most abundant species in these ecosystems is the decapod Cyclograpsus cinereus Dana, 1851. The aim of the present study, carried out in the spring and summer seasons between 2018 and 2020, was to determine the spatial distribution patterns of the decapod C. cinereus in different sites along the rocky shores of Antofagasta bay, northern Chile, in order to establish probabilistic models that explain its distribution at each site. Individuals were counted in random quadrants in the intertidal zone. The data thus obtained were processed by application of the variance/mean ratio to determine whether the distribution of individuals was random, aggregated or uniform, associated with Poisson, negative binomial or positive binomial distributions, respectively. The data revealed aggregated (negative binomial) distribution in 15 sampling events, and uniform (positive binomial) distribution in 4 events. The sampling sites were located on rocky shores in four sectors of an urban zone, and two in a protected zone; no significant differences were found between the densities of the sites in the two zones. The results of the interpretative probabilistic models indicated aggregated distribution patterns, agreeing with previously reported interpretative probabilistic models for the distribution of decapods on the rocky shores of central and southern Chile.

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Size overlap in intertidal decapod communities along the chilean coast

Cited by 3 publications

References 9 publications

Spatial Distribution of <em>Cyclograpsus cinereus</em> Dana 1851 in Rocky Shores of Antofagasta (23º27’ S, Chile)

Spatial Distribution of <em>Cyclograpsus cinereus</em> Dana 1851 in Rocky Shores of Antofagasta (23º27’ S, Chile)

Null models to explain highly diverse community of intertidal decapods on a temperate rocky coast in Antofagasta, northern Chile (23º27ʹS)

Spatial Distribution of Cyclograpsus cinereus Dana 1851 on the Rocky Shores of Antofagasta (23°27′ S, Chile)

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