Molecular identification of ray species traded along the Brazilian Amazon coast

Filho, Luis Fernando da Silva Rodrigues; Feitosa, Leonardo Manir; Nunes, Jorge Luíz Silva; Palmeira, Ana Rita Onodera; Martins, Ana Paula Barbosa; Giarrizzo, Tommaso; Costa, Larissa Di Léo Nogueira; Monteiro, Iann Leonardo Pinheiro; Gemaque, Romário; Gomes, Fernanda; Souza, Rosália Furtado Cutrim; Sampaio, Iracilda; Sales, João Bráullio de Luna

doi:10.1016/j.fishres.2019.105407

Cited by 19 publications

(28 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Despite the existence of catch and trade prohibitions, recent studies have demonstrated that several highly endangered species, including C. porosus, are continually caught in the BNC [22,80,81]. Furthermore, fishers report the lack of dialogue between the environmental agencies and their communities, as well as the virtually complete absence of inspections in the largest fishing ports of the region [78].…”

Section: Conservation Problems and Future Strategiesmentioning

confidence: 99%

From plentiful to critically endangered: Demographic evidence of the artisanal fisheries impact on the smalltail shark (Carcharhinus porosus) from Northern Brazil

2020

Self Cite

View full text Add to dashboard Cite

The smalltail shark, Carcharhinus porosus, was the most abundant elasmobranch species in fisheries off Brazil's northern coast (BNC) in the 1980s, but its population has been declining since the 1990s. For this reason, a demographic analysis is necessary to determine the extent of this decline and the fishing effect on the BNC's population. Therefore, we performed a stochastic demographic analysis of the population in the BNC, and considered its global center of abundance. Smalltail shark specimens (n = 937) were collected with gillnets in Maranhão state, eastern BNC, in the 1980s with sizes ranging between 29.6 and 120.0 cm total length. Most of the individuals (90.6%) caught were juveniles (< 6 years-old), and the mortality and exploitation rates showed that the species was overexploited (92.3% above the fishing mortality corresponding to the population equilibrium threshold). The smalltail shark's biological characteristics, such as slow growth and low fecundity, demonstrate that it is one of the least resilient species among similar sized coastal sharks in the region. All these factors yielded an annual decrease of 28% in the intrinsic population growth rate, resulting in a population decline of more than 90% in only 10 years, and much higher for the current period. This set of features comprising fishing recruitment occurring upon juveniles, overfishing, and intrinsically low resilience make the population unable to sustain fishing pressure and severely hamper biological recruitment, thus causing this drastic population decline. Furthermore, several local extinctions for this species in the northeastern and southeastern regions of Brazil highlight its concerning conservation scenario. Therefore, since similar fisheries characteristics occur throughout its distribution range, C. porosus fits the criteria E of the IUCN Red List for a critically endangered species and urgent conservation measures are needed to prevent its extinction in the near future.

show abstract

Section: Conservation Problems and Future Strategiesmentioning

confidence: 99%

From plentiful to critically endangered: Demographic evidence of the artisanal fisheries impact on the smalltail shark (Carcharhinus porosus) from Northern Brazil

2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…The specimen was morphologically identified based on the following diagnostic characters proposed by Stehmann et al (1978), indicated in the original description (Werner, 1904) State; see Figure 1). This area comprises estuaries, other sandy or muddy bottoms, and reef environments located on the coastlines of the Brazilian States of Pará (Barthem, 1985;Camargo & Isaac, 2001;Freitas et al, 2019b;Pinheiro & Frédou, 2004;Rodrigues-Filho et al, 2020;Santo et al, 2005;Silva et al, 2016), Maranhão (Almeida et al, 2011;Aragão et al, 2019;Guimarães-Costa et al, 2019;Lessa, 1986;Martins-Juras et al, 1987;Nunes et al, 2005Nunes et al, , 2011Rocha & Rosa, 2001;Silva et al, 2018), Piauí (Aragão et al, 2019;Guimarães-Costa et al, 2019;Mai et al, 2012;Melo et al, 2016) and…”

Section: Fishmentioning

confidence: 99%

The southernmost record and an update of the geographical range of the Atlantic chupare, Styracura schmardae (Chondrichthyes: Myliobatiformes)

Sales

Freitas

Cavalcante

et al. 2020

Journal of Fish Biology

View full text Add to dashboard Cite

The present study established the southernmost distribution range for the Chupare stingray Styracura schmardae based on a specimen caught on the easternmost portion of Ceará State, northeastern Brazil. Identification was based on diagnostic morphological characters and molecular data (sequence of the mitochondrial DNA gene nd2; 1046 bp). This record expands the known distribution range for this species by more than 1200 km and confirms that S. schmardae is distributed in more than one biogeographical province. Significance statement There are few records of the Atlantic Chupare stingray for Brazil and most of them are associated with the Amazon River mouth. New records indicate that this species is also present in the South Atlantic portion of the Brazilian coast. Apparently having a low abundance throughout its range, these new records increase the range of occurrence of this species.

show abstract

“…The difficulty in correctly identifying cartilaginous fish is due to the fact that they arrive either already in processed state in markets, or only their fins are landed, making morphological identification impossible (VOOREN & KLIPPEL, 2006). Because of this, molecular markers have been widely applied to identify species exhibiting economic interest (WARD et al, 2005;KYLE & WILSON, 2007;SEVILLA et al, 2007;HOLMES et al, 2009;ASIS et al, 2014;BINEESH et al, 2015;FIELDS et al, 2015;SEMBIRING et al, 2015;VAN DER MERWE & GLEDHILL, 2015;CHUANG et al, 2016;STEINKE et al, 2017;ALMERÓN-SOUZA et al, 2018;FEITOSA et al, 2018;FERRETE et al, 2019;HAQUE et al, 2019;HELLBERG et al, 2019;MUTTAQIN et al, 2019;RODRIGUES-FILHO et al, 2020).…”

Section: Molecular Identificationmentioning

confidence: 99%

“…These stocks are among the most vulnerable to the negative effects of fishing worldwide, indicating that genetic population characterization and stock evaluations are vital (FEITOSA et al, 2018;RODRIGUES FILHO et al, 2020). In the case of I. oxyrhynchus, for example, studies indicate that this species continues to be affected, as fishing removes not only adult males and females, but also immature individuals, influencing stock replacements in the Amazon region, thus altering the status of this species from endangered to almost extinct (LESSA et al, 2016).…”

Section: Genetic Diversitymentioning

confidence: 99%

“…In this context, molecular methodologies, such as DNA Barcoding, may be applied to correctly identify different species, as they allow for better accuracy in elasmobranch identification (WARD et al, 2005, HOLMES et al, 2009ASIS et al, 2014;BINEESH et al, 2017;FIELDS et al, 2015;SEMBIRING et al, 2015;VAN DER MERWE & GLEDHILL, 2015;CHUANG et al, 2016;STEINKE et al, 2017;ALMERÓN-SOUZA et al, 2018;FEITOSA et al, 2018;FERRETE et al, 2019;HAQUE et al, 2019;HELLBERG et al, 2019;MUTTAQIN et al, 2019;RODRIGUES-FILHO et al, 2020). Thus, the DNA Barcode technique serves as a basic tool in the implementation of shark and ray management plans aiming at conservation actions.…”

Section: Introdutionmentioning

confidence: 99%

See 1 more Smart Citation