The impact of a strong natural hypoxic event on the toadfish Aphos porosus in Coliumo Bay, south-central Chile

Hernández‐Miranda, Eduardo; Quiñones, Renato A.; Aedo, Gustavo; Díaz-Cabrera, Ernesto; Cisterna, José

doi:10.4067/s0718-19572012000300010

Cited by 13 publications

(16 citation statements)

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“…These authors reported a recovery in richness of the fish assemblage in a timescale of only 3 months; nevertheless, densities reached only about half their previous level after 2 years of the event. At a longer timescale, negative effects on the total density of the fish assemblage, including A. porosus, were also detected (Hernández-Miranda et al 2012a), similarly to the reduction in larval abundance of the sand stargazer observed from 2010 to 2012. Therefore, such event may have modified the population parameters of the sand-dwelling fish S. australis in central Chile, reducing its larval supply (i.e.…”

Section: Discussionmentioning

confidence: 48%

“…Natural hypoxic events may affect population dynamics of nearshore fishes in coastal waters of Chile, as it has been detected in toadfish Aphos porosus (Hernández-Miranda et al 2012a). An intense event of natural hypoxia in January 2008 affected the entire resident community of shallow Coliumo Bay, causing widespread mortality of organisms and a mass stranding event, with fish being one of the most affected groups (Hernández-Miranda et al 2010, 2012b.…”

Section: Discussionmentioning

confidence: 99%

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Interannual variations in the hatching pattern, larval growth and otolith size of a sand-dwelling fish from central Chile

et al. 2015

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Section: Discussionmentioning

confidence: 48%

Section: Discussionmentioning

confidence: 99%

Interannual variations in the hatching pattern, larval growth and otolith size of a sand-dwelling fish from central Chile

et al. 2015

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“…In this regard, a striking result is that although epibenthic faunal community composition and dominant species size structure in Coliumo Bay showed changes during the study period (Hernández‐Miranda et al. , ,b), the overall pattern seems remarkably stable. While none of the individual‐based samples provides evidence to support a power law scaling relationship of either species richness or abundance as a function of body size, there are noticeable deviations from the Weibull curve.…”

Section: Discussionmentioning

confidence: 95%

Dynamic relationships between body size, species richness, abundance, and energy use in a shallow marine epibenthic faunal community

Labra

Hernández‐Miranda

Quiñones

2014

Ecology and Evolution

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We study the temporal variation in the empirical relationships among body size (S), species richness (R), and abundance (A) in a shallow marine epibenthic faunal community in Coliumo Bay, Chile. We also extend previous analyses by calculating individual energy use (E) and test whether its bivariate and trivariate relationships with S and R are in agreement with expectations derived from the energetic equivalence rule. Carnivorous and scavenger species representing over 95% of sample abundance and biomass were studied. For each individual, body size (g) was measured and E was estimated following published allometric relationships. Data for each sample were tabulated into exponential body size bins, comparing species-averaged values with individual-based estimates which allow species to potentially occupy multiple size classes. For individual-based data, both the number of individuals and species across body size classes are fit by a Weibull function rather than by a power law scaling. Species richness is also a power law of the number of individuals. Energy use shows a piecewise scaling relationship with body size, with energetic equivalence holding true only for size classes above the modal abundance class. Species-based data showed either weak linear or no significant patterns, likely due to the decrease in the number of data points across body size classes. Hence, for individual-based size spectra, the SRA relationship seems to be general despite seasonal forcing and strong disturbances in Coliumo Bay. The unimodal abundance distribution results in a piecewise energy scaling relationship, with small individuals showing a positive scaling and large individuals showing energetic equivalence. Hence, strict energetic equivalence should not be expected for unimodal abundance distributions. On the other hand, while species-based data do not show unimodal SRA relationships, energy use across body size classes did not show significant trends, supporting energetic equivalence.

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“…Interestingly, A. porosus exhibits parental care and larvae without a pelagic stage, suggesting a low dispersal potential. Although this species has no commercial importance, it is subjected to high bycatch pressure by artisanal and industrial fisheries (Hernández-Miranda et al 2012). These characteristics make to A. porosus a vulnerable species.…”

mentioning

confidence: 99%

“…This species is a benthicdemersal fish and an important component of the ichthyofauna community (Hernández-Miranda et al 2012). Interestingly, A. porosus exhibits parental care and larvae without a pelagic stage, suggesting a low dispersal potential.…”

mentioning

confidence: 99%

Development and characterization of microsatellite markers for the toadfish Aphos porosus

Silva

Hernández‐Miranda

Brante

2014

Conservation Genet Resour

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The toadfish Aphos porosus is a coastal benthic-demersal fish from the Southeastern Pacific coast. This species exhibits parental care and low dispersal potential, and it is subjected to bycatch by artisanal and industrial fisheries, which make A. porosus a susceptible species in conservation terms. In this work we present 18 polymorphic microsatellite loci for this species. Allelic richness varied between 2 and 8 alleles and observed heterocigocity ranged between 0.026 and 0.737. Fourteen of the 18 loci were unlinked, polymorphic and in Hardy-Weinberg equilibrium. The non-exclusion probability over all loci was very low (0.0013). These loci show potential for population genetic analyses, for studying reproductive strategies and supporting conservation policies for this species.

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The impact of a strong natural hypoxic event on the toadfish Aphos porosus in Coliumo Bay, south-central Chile

Cited by 13 publications

References 44 publications

Interannual variations in the hatching pattern, larval growth and otolith size of a sand-dwelling fish from central Chile

Interannual variations in the hatching pattern, larval growth and otolith size of a sand-dwelling fish from central Chile

Dynamic relationships between body size, species richness, abundance, and energy use in a shallow marine epibenthic faunal community

Development and characterization of microsatellite markers for the toadfish Aphos porosus

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