Influence of environmental variables on the growth and reproductive cycle of<i>Crassostrea</i>(Mollusca, Bivalvia) in Guaratuba Bay, Brazil

Neto, Roberto Montanhini; Ludwig, Sandra; Horodesky, Aline; Girotto, Marcus V.F.; Castilho-Westphal, Gisele G.; Ostrensky, Antônio

doi:10.1080/07924259.2012.747449

Cited by 18 publications

(10 citation statements)

References 17 publications

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“…La reducción de la salinidad, está asociada a cambios en los niveles de nutrientes que influyen en la disponibilidad de alimento, lo que actúa como un agente estresante para C. virginica, y provoca la liberación de gametos (Jmeliova & Sanz, 1969;Angell, 1986). En el mismo sentido, Neto et al (2013) observaron que los decrementos rápidos en la salinidad, estimulan la citolisis de las paredes de los folículos gonádicos en especies del género Crassostrea, permitiendo la liberación de los gametos. Con respecto a la influencia de este parámetro en distintas tallas de C. virginica, La Peyre, Eberline, Soniat y La Peyre (2013), observaron un efecto diferencial al utilizar como criterios el reclutamiento, el crecimiento, y la mortandad.…”

Section: Discussionunclassified

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Effect of temperature and salinity on the reproductive cycle of males and females of Crassostrea virginica (Bivalvia: Ostreidae).

Aguirre

Enriquez

Martínez

et al. 2016

RBT

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Effect of temperature and salinity on the reproductive cycle of males and females of Crassostrea virginica (Bivalvia: Ostreidae). The American oyster, Crassostrea virginica, is one of the most important economic coastal fishery activities in Mexico. As for other bivalve molluscs, its sustainability is based on healthy populations, and additional information on current reproductive cycles, will reinforce local management strategies. The objective of this study was to evaluate the effect of temperature and salinity on the gonadal development stages in both sexes and in two size groups (40-60 mm and ≥ 61 mm) of C. virginica from Tamiahua Lagoon, Gulf of Mexico. Monthly surveys of 90 organisms were undertaken, for a yearly total of 1 080 oysters sampled from the lagoon in 2011. Both field and laboratory work used standard procedures. Our results showed that reproduction was continuous in both sexes, but some peaks of the reproductive cycle were observed along the year. Peaks registered from spawning/spent oysters. Maturity of females of both range sizes was positively correlated with temperature, but not for males. For spawning, spent individuals, males of sizes ≥ 61 mm were positively correlated with salinity, whereas smaller males (40-60 mm) and females of both sizes, did not show any correlation. In this study, we observed that temperature and salinity had a different effect in the reproduction of the American oyster of different sizes and sexes of Tamiahua lagoon. Rev. Biol. Trop. 64 (2): 449-459. Epub 2016 June 01.

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Section: Discussionunclassified

“…En este sentido Bayne (1973), Wilson et al (2005) y Neto et al (2013) observaron en diferentes bivalvos marinos que la salinidad y la cantidad de alimento son los que influyen en la actividad reproductiva.…”

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Effect of temperature and salinity on the reproductive cycle of males and females of Crassostrea virginica (Bivalvia: Ostreidae).

Aguirre

Enriquez

Martínez

et al. 2016

RBT

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“…High concentrations of organochlorine compounds were identified near the mouth of the São João and Cubatão rivers in the inner GB region; these rivers drain regions impacted by agriculture and industries (Combi et al ., 2013). Another human influence in this environment is aquaculture, which includes both extraction from local oyster farms and the fattening of seeds obtained from natural banks in other estuaries in the region (Neto et al ., 2013).…”

Section: Methodsmentioning

confidence: 99%

Human‐facilitated dispersal of the Gulf toadfish Opsanus beta (Goode & Bean, 1880) in the Guaratuba Bay, south‐eastern Brazil

Carvalho

Ferreira

Fávaro

et al. 2020

Journal of Fish Biology

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Opsanus beta is endemic to the Gulf of Mexico and has recently been introduced to the Brazilian coast; probably the introduction is via ballast water and/or oil rigs. In this study, the presence of the species is recorded for the first time in Guaratuba Bay, on the southern coast of Brazil. In this region there are no port terminals, which suggests that O. beta used a different mode of human‐facilitated transport to colonize Guaratuba Bay.

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“…However, natural oyster reefs have become severely impacted at a global level due to human pressure and need to be protected (Beck et al, 2011). Crassostrea brasiliana is the most important native oyster species occurring in Brazilian estuaries, and is mainly harvested from natural populations, presenting a high socio-economic value, and is especially important for local extractivist communities (Mendonça and Machado, 2010;Neto et al, 2013). Crassostrea gigas, a non-native species to Brazil and virtually distributed all over the world, is currently cultured in the southern state of Santa Catarina, and accounts for over 90% of the national oyster aquaculture production (Melo et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Native and exotic oysters in Brazil: Comparative tolerance to hypercapnia

Moreira

Figueira

Pecora

et al. 2018

Environmental Research

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Environmental hypercapnia in shallow coastal marine ecosystems can be exacerbated by increasing levels of atmospheric CO. In these ecosystems organisms are expected to become increasingly subjected to pCO levels several times higher than those inhabiting ocean waters (e.g.: 10,000µatm), but still our current understanding on different species capacity to respond to such levels of hypercapnia is limited. Oysters are among the most important foundation species inhabiting these coastal ecosystems, although natural oyster banks are increasingly threatened worldwide. In the present study we studied the effects of hypercapnia on two important oyster species, the pacific oyster C. gigas and the mangrove oyster C. brasiliana, to bring new insights on different species response mechanisms towards three hypercapnic levels (ca. 1,000; 4,000; 10,000 µatm), by study of a set of biomarkers related to metabolic potential (electron transport system - ETS), antioxidant capacity (SOD, CAT, GSH), cellular damage (LPO) and energetic fitness (GLY), in two life stages (juvenile and adult) after 28 days of exposure. Results showed marked differences between each species tolerance capacity to hypercapnia, with contrasting metabolic readjustment strategies (ETS), different antioxidant response capacities (SOD, CAT, GSH), which generally allowed to prevent increased cellular damage (LPO) and energetic impairment (GLY) in both species. Juveniles were more responsive to hypercapnia stress in both congeners, and are likely to be most sensitive to extreme hypercapnia in the environment. Juvenile C. gigas presented more pronounced biochemical alterations at intermediate hypercapnia (4,000µatm) than C. brasiliana. Adult C. gigas showed biochemical alterations mostly in response to high hypercapnia (10,000µatm), while adult C. brasiliana were less responsive to this environmental stressor, despite presenting decreased metabolic potential. Our data bring new insights on the biochemical performance of two important oyster species, and suggest that the duration of extreme hypercapnia events in the ecosystem may pose increased challenges for these organisms as their tolerance capacity may be time limited.

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Influence of environmental variables on the growth and reproductive cycle ofCrassostrea(Mollusca, Bivalvia) in Guaratuba Bay, Brazil

Cited by 18 publications

References 17 publications

Effect of temperature and salinity on the reproductive cycle of males and females of Crassostrea virginica (Bivalvia: Ostreidae).

Effect of temperature and salinity on the reproductive cycle of males and females of Crassostrea virginica (Bivalvia: Ostreidae).

Human‐facilitated dispersal of the Gulf toadfish Opsanus beta (Goode & Bean, 1880) in the Guaratuba Bay, south‐eastern Brazil

Native and exotic oysters in Brazil: Comparative tolerance to hypercapnia

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