Human‐facilitated dispersal of the Gulf toadfish <scp><i>Opsanus beta</i></scp> (Goode &amp; Bean, 1880) in the Guaratuba Bay, south‐eastern Brazil

Carvalho, Bárbara Maichak de; Ferreira, Augusto Luiz; Fávaro, Luís Fernando; Artoni, Roberto Ferreira; Vitule, Jean R. S.

doi:10.1111/jfb.14421

Cited by 6 publications

(8 citation statements)

References 17 publications

(23 reference statements)

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“…However, the intraspecific split of three subclusters, with a maximum K2P divergence of 6.5%, might indicate taxonomic problems in this group, such as cryptic species or even misidentification of species (Ribeiro et al ., 2012; Gangan et al ., 2019). In this context, a deeper taxonomic and population knowledge about this group is necessary, since multiple records of O. beta in the Brazilian coast were reported in the last few years (Ribeiro et al ., 2012; Tomás et al ., 2012; Carvalho et al ., 2020; Cordeiro et al ., 2020) and whether these samples represent unique taxonomic units remains to be answered.…”

Section: Discussionmentioning

confidence: 99%

“…The toadfish Opsanus beta (Goode & Bean, 1880) has its natural distribution in the Western Central Atlantic, from the Gulf of Mexico to Palm Beach, Florida, including the Little Bahamas (Collette, 2002; Froese & Pauly, 2020) and it is one of the most abundant fish in South Florida estuaries (Serafy et al ., 1997). Recent records of O. beta species on the south-eastern and southern Brazilian coast near to port areas suggest this species was able to reach these regions via ships' ballast waters (Caires et al ., 2007; Ribeiro et al ., 2012; Tomás et al ., 2012; Carvalho et al ., 2020; Cordeiro et al ., 2020).…”

Section: Introductionmentioning

confidence: 99%

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Opsanus beta (Goode & Bean, 1880) (Acanthopterygii: Batrachoididae), a non-indigenous toadfish in Sepetiba Bay, south-eastern Brazil

et al. 2021

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The introduction of non-native predator fish is thought to have important negative effects on native prey populations. Opsanus beta is a non-native toadfish that was originally described in the Gulf of Mexico, between the west coast of Florida and Belize. In the present study, we describe, for the first time, the occurrence of O. beta in Sepetiba Bay (22°55′S), south-eastern Brazil, probably brought into the bay through ships' ballast water. Thirteen specimens were recorded in this area near to Sepetiba Port. Similarly, three other records of this species in the Brazilian coast were also reported near to port areas at Rio de Janeiro (22°49′S), Santos (23°59′S) and Paranaguá (25°33′S) ports. To confirm the species identity, we employed DNA barcoding and compared our samples with sequences deposited on public databases, which indicated that our samples are highly similar (>99.9% of genetic similarity) to O. beta samples collected near its type locality. Several individuals were found in the capable spawning phase, according to histological analysis of the reproductive cell stages. The environmental plasticity of this species and the favourable local environmental conditions probably enabled the establishment of O. beta in this region. This raises concerns of potential high invasion impact due to this species' diet and reproductive capacity.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Opsanus beta (Goode & Bean, 1880) (Acanthopterygii: Batrachoididae), a non-indigenous toadfish in Sepetiba Bay, south-eastern Brazil

et al. 2021

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“…In Brazil, O. beta was recorded in southeastern and southern estuaries (Rio de Janeiro, São Paulo and Paraná states) with large port terminals (Andrade‐Tubino et al ., 2021; Caires et al ., 2007; Cordeiro et al ., 2020; Tomás et al ., 2012) and only one population was recorded in an estuary without a port terminal [Guaratuba Bay (GTB), Paraná – Carvalho et al ., 2020]. In all Brazilian records, young and adult O. beta were observed (Andrade‐Tubino et al ., 2021; Carvalho et al ., 2020; Carvalho et al ., 2022; Cordeiro et al ., 2020; Tomás et al ., 2012), which indicates that this species is established in Brazil. Nonetheless, along the Brazilian coast there are gaps in the spatial distribution of this species, and the authors do not know if there is a distribution continuum or not.…”

Section: Introductionmentioning

confidence: 99%

Citizen science as a tool for understanding the silent dispersion of toadfish Opsanus beta (Goode and Bean, 1880)

Carvalho

Freitas²,

Tomás

et al. 2022

Journal of Fish Biology

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Citizen science is an excellent tool in studies of the spatial distribution of non‐native species. In Brazil, Opsanus beta has recently been introduced. Studies indicate the occurrence of this species in five estuaries off the Brazilian coast (Guanabara Bay, Sepetiba Bay, Santos Bay, Paranaguá Estuarine Complex and Guaratuba Bay). The present study aims to understand the dispersion of this species on the Brazilian coast through citizen science. Between January and May 2021, information about O. beta was weekly posted in 32 recreational fishing Facebook groups. Sixty‐five fishers reported catches of O. beta in estuaries (Guanabara Bay, Sepetiba Bay, Santos Bay and Paranaguá Estuarine Complex). In addition, there were reports from other shallow areas outside adjacent estuaries (Bertioga and Peruíbe, in Sao Paulo State) and the first occurrence record for Laguna (Santa Catarina State), a southern estuarine zone (28° 29′ 45″ S to 48° 45′ 36″ W). In four estuaries along the Brazilian coast where O. beta was recorded, there are internal ports that trade with countries from the Gulf of Mexico and Caribbean Sea (species original range), indicating ballast water as a possible introduction route. In Laguna, the introduction may have occurred by maritime cabotage services. The reproductive capacity, the aquarists' interest, the absence of introduction policies aimed at this species and the cabotage fleet transportation may be factors that help further extend the dispersal of O. beta on the Brazilian coast.

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“…The same pattern of increase in introduced species has also been documented in the South-western Atlantic, and along the Brazilian coast (Schmidt et al ., 2020). Together, these species, such as Omobranchus punctatus and Opsanus beta , have expanded their geographic distribution in recently colonized areas (Caires et al ., 2007; Lasso-Alcalá et al ., 2011; Tomás et al ., 2012; Contente et al ., 2015; Carvalho et al ., 2020).…”

Section: Introductionmentioning

confidence: 99%

“…Opsanus beta was first recorded on the Brazilian coast in the Paranaguá Estuarine Complex (PEC) (Caires et al ., 2007) and Santos Bay (STB) (Tómas et al ., 2012). Recent studies have recorded O. beta in Guanabara, Sepetiba, Guaratuba and Laguna bays (Carvalho et al ., 2020, 2022; Cordeiro et al ., 2020; Almeida-Tubino et al ., 2021, respectively). Ballast water and/or an association with an oil platform are the most plausible vectors, which have introduced Opsanus beta in the Brazilian coast.…”

Section: Introductionmentioning

confidence: 99%

Inferring ecological connectivity between populations of Opsanus beta (Goode & Bean, 1880) from the southern Gulf of Mexico and the South-western Atlantic coast

Carvalho¹,

Pérez

Aguilar‐Perera

et al. 2022

J. Mar. Biol. Ass.

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Otoliths are an excellent tool in studies on ecological connectivity of fish species populations. Opsanus beta is an invasive species introduced on the Brazilian coast, but not native from the Gulf of Mexico. The present study aimed to compare the otolith contours of specimens collected in Mexico (Celestún, CEL) and in two Brazilian estuaries (Santos Bay, STB, and Paranaguá Estuarine Complex, PEC). In the laboratory, 99 otoliths were extracted, photographed and compared using wavelet analysis. The otolith contours varied between sites (39 from CEL, 26 from STB and 34 from PEC). The linear discriminant analysis correctly reclassified 87.9% of otoliths by sites, with the best reclassifications in the CEL (97.36%), followed by PEC (88.23%) and SBT (73.07%). MANOVA showed significant differences in otolith contours between sites (F = 5.37; P < 0.005). The otolith contour from CEL was significantly different from those from the PEC and SBT. However, the otolith contour of the two Brazilian estuaries did not significantly differ among them (MANOVA, P > 0.005). Our results indicate O. beta populations on the Brazilian coast are connected, and probably isolated from the Mexican population.

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

Cited by 6 publications

References 17 publications

Opsanus beta (Goode & Bean, 1880) (Acanthopterygii: Batrachoididae), a non-indigenous toadfish in Sepetiba Bay, south-eastern Brazil

Opsanus beta (Goode & Bean, 1880) (Acanthopterygii: Batrachoididae), a non-indigenous toadfish in Sepetiba Bay, south-eastern Brazil

Citizen science as a tool for understanding the silent dispersion of toadfish Opsanus beta (Goode and Bean, 1880)

Inferring ecological connectivity between populations of Opsanus beta (Goode & Bean, 1880) from the southern Gulf of Mexico and the South-western Atlantic coast

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