Capacity of tissue water regulation is impaired in an osmoconformer living in impacted estuaries?

David, Daniela Dantas; Lima, Otoniel Gonçalves; Nóbrega, Alice Maria Cabral de Sousa; Amado, Enelise Marcelle

doi:10.1016/j.ecoenv.2018.09.111

Cited by 5 publications

(4 citation statements)

References 54 publications

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“…Thus, the results found here indicate that the DM zone (included in an environmental protection area) is the environment with the best condition among the analyzed zones, in contrast, the DP zone is indicated as having the worst condition, in terms of pollution, considering the two estuaries. Other studies conducted in the same estuaries demonstrate different intensities of ecological disturbances among these environments (Alves et al, ; Dolbeth, Vendel, Pessanha et al, ; Santana, Dolbeth, Barbosa, & Patrício, ; David, Lima, de Sousa Nóbrega & Amado, ). Alves et al () recorded a higher nutrient enrichment (ammonium, nitrite, nitrate, and total phosphorus) in the Paraiba River Estuary and found that A. brasiliensis from this estuary has a poor diet with greater frequencies of microplastics and parasites in their stomachs than A. brasiliensis from the Mamanguape River Estuary, a clear indication of higher degree of human disturbance in the Paraiba River Estuary.…”

Section: Discussionmentioning

confidence: 85%

“…Alves et al () recorded a higher nutrient enrichment (ammonium, nitrite, nitrate, and total phosphorus) in the Paraiba River Estuary and found that A. brasiliensis from this estuary has a poor diet with greater frequencies of microplastics and parasites in their stomachs than A. brasiliensis from the Mamanguape River Estuary, a clear indication of higher degree of human disturbance in the Paraiba River Estuary. David, Lima, de Sousa Nóbrega, and Amado () have described that the level of pollution causes disturbances in the capacity of water regulation and increases the MXR activity in oyster tissues of sites in upstream and downstream areas of Paraiba River Estuary and in upstream area of Mamanguape River Estuary, while the best tissue and cell water regulation, and the lowest MXR activity, was found in oyster from downstream of Mamanguape Estuary.…”

Section: Discussionmentioning

confidence: 99%

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Estuarine fish assemblages present a species‐specific difference in the multixenobiotics resistance activity

et al. 2019

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We investigated the activity of the multixenobiotic resistance (MXR) phenotype, a biological defense system in aquatic organisms, in the fish assemblages of two tropical estuaries with different degrees of environmental impacts, the Paraiba River and Mamanguape River Estuaries. The aim of this work was to compare the activity of the MXR phenotype of different fishes to test the hypothesis that each species has an inherent activity level and to use this activity as a bioindicator of aquatic contamination. We assessed the MXR activity of the gills, using rhodamine B (RB) accumulation assay. The results demonstrated a species-specific difference in the MXR activity of fishes caught in the same estuarine zone. Also, the pelagic species Eucinostomus melanopterus, Eucinostomus argenteus, and Lutjanus jocu had higher RB accumulation, while the demersal species Sphoeroides testudineus and Sphoeroides greeleyi had the lowest RB accumulation, suggesting that the ecological characteristic of fish in the water column exerts an influence on MXR activity. Besides, we demonstrated the potential of using the gill MXR activity of the key estuarine species, the Brazilian silversides Atherinella brasiliensis, as a tool for biomonitoring estuaries. K E Y W O R D S biomarker, Brazilian silverside, P-glycoprotein, MXR, rhodamine B, tropical estuaries SUPPORTING INFORMATION Additional supporting information may be found online in the Supporting Information section. How to cite this article: Macêdo AKS, da Silva JRP, dos Santos HB, Thomé RG, Vendel AL, Amado EM. Estuarine fish assemblages present a species-specific difference in the multixenobiotics resistance activity. J. Exp. Zool. 2019;331: 530-539. https://doi.

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Section: Discussionmentioning

confidence: 85%

Section: Discussionmentioning

confidence: 99%

Estuarine fish assemblages present a species‐specific difference in the multixenobiotics resistance activity

et al. 2019

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“…These economic activities together with the impact of urban wastewater, have been leading to an intense environmental degradation of the estuary. Recent studies have shown a higher degree of human disturbance in the Paraiba River estuary, such as a higher nutrient enrichment, microplastic pollution, and revealed a high activity of a cellular detoxification by fishes, which indicates a high concentration of pollutants in the water of the Paraiba River estuary (Alves et al 2016, de Moura et al 2016, Santos et al 2017, David et al 2018, Macêdo et al 2019.…”

Section: Study Areamentioning

confidence: 99%

Espécies de peixes do estuário do Rio Paraíba, nordeste do Brasil

Vendel¹,

Macêdo²,

Silva³

et al. 2022

Biota Neotrop.

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The Paraiba River estuary is the largest and most important estuary of Paraiba state, northeastern Brazil. It is under intense environmental degradation by the surrounding human population, and possibly several fish species are at risk in this habitat. Scientific sampling of the ichthyofauna started in the late 1970's and proceeded until recently. We present a list of fish species captured in this estuary, based on voucher specimens housed at the Federal University of Paraiba collection. Four orders of Chondrichthyes and 26 orders of Osteichthyes were identified. A total of 187 fish species, including eight species of Chondrichthyes and 179 Osteichthyes, with 123 genera and 57 families were identified. Perciformes dominated in terms of richness (32 species), followed by Acanthuriformes and Clupeiformes. Comparing estuaries along the Brazilian northeastern coast and considering our large time sampling span, a higher richness would be expected. According to the IUCN Red List, Urotrygon microphthalmum is considered Critically Endangered and more seven species are classified as Vulnerable: Rhizoprionodon porosus, Rhinoptera bonasus, Megalops atlanticus, Epinephelus itajara, Hyporthodus niveatus, Lutjanus cyanopterus, and Cynoscion acoupa. Three of these species also appear in the same category in the threatened Brazilian list, all of which have declining population trends. Concerning the Elasmobranchii, Carcharhinus porosus is listed as Critically Endangered in our country and globally. This inventory organizes and broadens knowledge on the fish community that occurs in this important ecosystem, with inferences about life habits, ecological guilds and conservation status of the fish species.

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“…Osmoconformers can be euryhaline in the measure that they can control the volume of their cells, performing isosmotic intracellular regulation (IIR), or regulatory volume decrease, upon exposure to dilute seawater (Florkin, 1962;Foster et al, 2010;Freire, Onken et al, 2008;Henry et al, 2012;Péqueux, 1995). Cell volume regulation costs energy (Amado et al, 2015;David et al, 2018;Florkin, 1962;Kirschner, 1991). Euryhaline osmoregulators, which perform hyper regulation, in their turn, sustain significant osmotic gradients to the water through the activation of ion transporters notoriously including the ubiquitous Na + /K + -ATPase, especially in the gills, net absorbing salt (Faleiros et al, 2010;Havird et al, 2014;Péqueux, 1995;Wang et al, 2012).…”

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confidence: 99%

Acute metabolic responses of two marine brachyuran crabs to dilute seawater: The aerobic cost of hyper regulation

Rios

Freire

2023

J Exp Zool Pt A

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Hepatus pudibundus ("flecked box crab") is a stenohaline osmoconfomer, and restricted to marine habitats. Callinectes danae ("swimming crab Dana") lives in coastal/estuarine waters and is a weak hyper regulator. There is no consensus on which strategy is more expensive metabolically face salinity challenges: conformation with higher dependence on cell volume regulation, or hyper regulation, alleviating the need for intense cell volume regulation. Crabs were probed for their acute response to dilute seawater through exposures to salinities 35‰, 30‰, 25‰, and 20‰ for 2, 4, and 6 h. Hemolymph osmolality, lactate, and ions (chloride, sodium, magnesium, potassium) were assayed, as well as muscle water content.Water dissolved oxygen, ammonia, and pH levels were also measured. H. pudibundus conformed for osmolality and displayed increase in muscle hydration along the decrease in salinity down to 25‰, while C. danae efficiently maintained hemolymph osmo ionic stability, consumed more oxygen, acidified more the water, and released more ammonia. In 25‰, both species spent energy: H. pudibundus putatively controlling cell volume, and C. danae regulating hemolymph concentrations. In 20‰, H. pudibundus closed itself, avoiding the contact of the interface epithelia with the external environment and producing much lactate, whereas C. danae spent more energy (aerobic) in extracellular osmo ionic stability. Under these conditions, anisosmotic extracellular regulation (together with additional cell volume regulation) is more oxygen consuming than osmoconformation with a putatively more intense challenge to cell volume. The exposure to hyposalinity limits the occupation of estuarine environments by H. pudibundus in short and middle term.

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Capacity of tissue water regulation is impaired in an osmoconformer living in impacted estuaries?

Cited by 5 publications

References 54 publications

Estuarine fish assemblages present a species‐specific difference in the multixenobiotics resistance activity

Estuarine fish assemblages present a species‐specific difference in the multixenobiotics resistance activity

Espécies de peixes do estuário do Rio Paraíba, nordeste do Brasil

Acute metabolic responses of two marine brachyuran crabs to dilute seawater: The aerobic cost of hyper regulation

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