The rocky reef fishes of Vermelha Beach, a marine estuarine transitional zone at Guanabara Bay, Brazil

Rodrigues-Barreto, Nathália; Shimada-Brotto, Daniel Vasconcelos; Guterres-Giordano, Rodolfo; Bertoncini, Áthila Andrade; Santos, Luciano Neves dos

doi:10.3856/vol45-issue1-fulltext-4

Cited by 12 publications

(3 citation statements)

References 23 publications

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“…Stephanolepis hispidus (Monacanthidae), and Abudefduf saxatilis (Pomacentridae) were the abundant species inhabiting an exposed estuarine beach located in a marine-estuarine transitional zone (Vermelha beach) (Rodrigues-Barreto et al, 2017). For a sheltered estuarine beach (Flamengo beach), richness and abundance were higher during spring (September to November) and lower during winter (June to August), while the relative abundance of fishes varied according to seasonal shifts in day length (Vasconcellos et al, 2010).…”

Section: Guanabara Bay: Southeast Brazilmentioning

confidence: 99%

Systematic Review of Fish Ecology and Anthropogenic Impacts in South American Estuaries: Setting Priorities for Ecosystem Conservation

Barletta

Lima

2019

Front. Mar. Sci.

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Research on estuarine ecology in South America (SA) increased quali-quantitatively since the early 1980 in search of consistent recommendations for estuarine conservation. The most important ecological theory achieved is that the seasonal fluctuation of the salinity gradient creates an ecocline influenced by gradual changes between river-dominated to marine-like waters. Estuarine fish fauna adapts to these changeable abiotic characteristics, including the spatial, and seasonal bioavailability of dissolved oxygen and numerous pollutants. However, studies on the influence of the estuarine ecocline are still missing for key estuarine systems. This study provides an overview of fish ecology and anthropogenic impacts within estuarine systems of SA and discusses priorities for environmental conservation. Research on fish reached important conclusions regarding essential habitats and fish interaction with other biological and abiotic compartments over spatio-temporal settings, including conditions of severe anthropogenic impacts. These impacts are related to unplanned urban settlements, industrial estates, ports, damming of major rivers, dredging activities, and deforestation for extensive farming. Changes in estuarine morphology alter natural flows and lead to habitat losses, disrupting the ecocline and impairing fishes from moving among formerly connected habitats, especially earlier ontogenetic phases. In addition, industrial, urban, and farming activities often result in high loads of metals and persistent organic pollutants, organic enrichment and oxygen depletion. Moreover, plastic debris, a ubiquitous contaminant with sources on every human activity, including fishing, when fragmented into microplastics, become preferably concentrated in semi-enclosed environments, as estuaries. Metals, POPs and microplastics are actually asserted to be persistent. When in high concentrations, they become bioavailable to the estuarine trophic web through bioaccumulation, being biomagnified or biotransfered toward higher trophic level organisms, such as top predator fishes. Therefore, research on environmental quality and fish ecology must be based on robust sampling designs along the whole ecocline using long-term approaches. In addition, basic sanitation, co-management, an improved Barletta and Lima Ecology and Conservation of South American Estuaries licensing system and scientifically-based risk assessments/monitoring for all sorts of enterprise are also urgent. These conservation priorities need to be in place before human-driven changes surpass the ecosystem's capacity to produce resources and maintain services.

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Section: Guanabara Bay: Southeast Brazilmentioning

confidence: 99%

Systematic Review of Fish Ecology and Anthropogenic Impacts in South American Estuaries: Setting Priorities for Ecosystem Conservation

Barletta

Lima

2019

Front. Mar. Sci.

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“…The spiny pufferfish (Chilomycterus spinosus spinosus), which was relatively more abundant in the Gamboa do Sucuriu, is also considered a species whose occurrence is associated with reefs (Rodrigues- Barreto et al 2017). Omnivores are best represented in places where there is a large variety of sessile invertebrates, and consequently offer a greater variety of food (Ferreira et al 2001).…”

Section: Discussionmentioning

confidence: 99%

Environmental Drivers of Fish Assemblages From the Shallow Infralittoral Areas of the Paranaguá Bay, Southern Brazil

et al. 2020

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The composition of estuarine fish fauna is dynamic and complex. Despite the variation in fish fauna in estuaries, it is possible to observe some species associated with microhabitats. The assemblage composition of these communities is apparently derived from habitat selection. The aim of this study was to assess the structure of the demersal fish fauna of the Paranaguá Bay and its relationship with biotic and abiotic factors. To this end, monthly collections were conducted using an otter trawl, from October 1999 to September 2000, at five sites in the shallow infralittoral. Biotic (organic matter, and invertebrates) and abiotic factors (salinity, temperature, pH, dissolved oxygen, seston, and nutrients) were recorded during sampling. A total of 6,623 individuals were captured, belonging to 2 species of Chondrichthyes and 53 species of Actinopterygii (26 families). Sciaenidae was the most representative in terms of richness, with 11 species, and Ariidae was the most representative in terms of abundance. The catfish Cathorops spixii was the most abundant species, representing 21 % of the entire catch. There were significant differences in the composition and abundance of the fish fauna among the studied areas, as evidenced by the Shannon-Wiener diversity index. Such differences seem to be related to the complexity of habitats, which occur due to different types of bottom cover found at each sampling site. The abiotic variables indicated little influence on the structure of the fish assembly. These results contribute to a better understanding of the fish fauna from the shallow infralittoral areas of the Paranaguá Bay, and provide data to decision makers for better implementation of management and conservation measures.

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“…Flamengo and Urca Beach are considered external seaport points since they are located near the oceanic zone, mainly Urca. Urca Beach is located very near the mouth of the bay, in the lower estuary region, suffering the influence of both oceanic marine waters and organic matter from inside the bay [13,27,28]. The Rio de Janeiro seaport is the major local domestic and international cargo tourist and people transportation route by the sea.…”

Section: Study Areamentioning

confidence: 99%

Dredging Activities Carried Out in a Brazilian Estuary Affect Mercury Levels in Swimming Crabs

Rodrigues

Ferrari

Hauser‐Davis

et al. 2020

IJERPH

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(1) Although suffers from intense pollution inputs, Guanabara Bay, the most socioeconomically and environmentally important estuary in Rio de Janeiro, Brazil, is still home to a diverse fauna, including several fish and crab species consumed by humans. The bay presents high sedimentation rates and sediment contamination, further aggravated by dredging processes carried out in recent years. In this context, this study aimed to verify the effect of the dredging process on total mercury (THg) concentrations at Guanabara Bay through swimming crab assessments sampled before (2016), during (2017), and after (2018) the dredging process, and mainly, if the detected concentrations can be harmful to consumer health; (2) Methods: Swimming crab samplings were carried out at the same time and sampling points in 2016, 2017 and 2018 and the total Hg was determined using a Direct Mercury Analyzer (DMA-80, Milestone, Bergamo, Italy); (3) Results: Increased Hg concentrations were observed during the dredging process, decreasing to lower values, close to the initial concentrations, at the end of the process. Some of the investigated abiotic factors favor Hg dynamics in the aquatic environment, while others were positively altered at some of the assessed sampling areas at the end of the dredging process; (4) Conclusions: Although crab Hg levels were below maximum permissible limits for human consumption, it is important to note that these animals are significantly consumed around Guanabara Bay, which may lead to public health issues in the long term.

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The rocky reef fishes of Vermelha Beach, a marine estuarine transitional zone at Guanabara Bay, Brazil

Cited by 12 publications

References 23 publications

Systematic Review of Fish Ecology and Anthropogenic Impacts in South American Estuaries: Setting Priorities for Ecosystem Conservation

Systematic Review of Fish Ecology and Anthropogenic Impacts in South American Estuaries: Setting Priorities for Ecosystem Conservation

Environmental Drivers of Fish Assemblages From the Shallow Infralittoral Areas of the Paranaguá Bay, Southern Brazil

Dredging Activities Carried Out in a Brazilian Estuary Affect Mercury Levels in Swimming Crabs

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