Rodrigo Domingues

University of São Paulo | USP · Oceanographic Institute (IO) (São Paulo)

The silky shark, Carcharhinus falciformis, is a large-bodied, oceanic-coastal, epipelagic species found worldwide in tropical and subtropical waters. Despite its commercial importance, concerns about overexploitation, and likely ecological significance of this shark as an upper trophic-level predator, understanding of its population dynamics remain...

Five new records of louvars Luvarus imperialis are documented for the south-west Atlantic Ocean, extending its distribution range in this ocean. The presence of one ripe specimen, associated with the previous records of larvae and juveniles, suggests that L. imperialis spawn in this region. The possible association of juveniles with shoals of skipj...

5 SUMMARY Incidental catches of dolphinfish, Coryphaena hippurus, and wahoo, Acanthocybium solandri, by Sao Paulo tuna longline fleet off south and southeast Brazil from 1971 to 2009 were analyzed. The main change in this fleet was the substitution of traditional Japanese longline to surface longline (monofilament). Thus, it was used in the 1971-19...

Sharks of the genus Carcharhinus exhibit subtle morphological differences that are difficult to observe because of the common practice of head and fin removal, making species identification challenging. A total of 317 sharks, commonly called ‘cação‐baia’ (large individuals) or ‘machote’ (small size) in Brazil, were captured by the tuna fleet at the...

Representatividade das sequências dos barcodes COI, 18s e 28s de espécies do filo Porifera que ocorrem no litoral paulista nos principais bancos de dados de sequências genéticas (NCBI, BOLD System e Silva Database) e análises ecológicas de NMDS, ANOSIM e distância genética para entender a distribuição desses organismos em relação a batimetria e loc...

The trade of elasmobranchs (sharks and rays) in Brazil threatens the country’s rich endemic biodiversity. The present study explored the use of DNA-based tools to monitor the Brazilian elasmobranch trade, focusing on their role in identifying processed products and supporting conservation efforts. A systematic search of literature was conducted and...

The trade of elasmobranchs (sharks and rays) in Brazil raises significant concerns due to the country's rich endemic biodiversity. The present study explores the use of DNA-based tools to monitor the Brazilian elasmobranch trade, focusing on their role in identifying processed products and supporting conservation efforts. A systematic search of lit...

The Neotropical fish fauna comprises approximately 6080 species, of which almost 3000 inhabit the Amazon River basin. However, the construction of hydroelectric dams has threatened this biodiversity by habitat fragmentation. To uncover the putative effect of river impoundment on migratory fish species, over 5400 eggs and larvae were collected from...

Chondrichthyes (including sharks, rays, and chimaeras) are a class of jawed cartilaginous fishes (with skeletons composed primarily of cartilage), with major relevance to the marine ecosystems and to humanity. However, cartilaginous fishes are facing various threatens, inflicting abrupt declines in their populations. Thus, critical assessment of av...

The shortfin mako, Isurus oxyrinchus, is an oceanic pelagic shark species found worldwide in tropical and subtropical waters. It is frequently caught by pelagic longline fisheries, but despite its commercial importance and ecological significance, little is still known about its biology and ecology at the molecular level. Therefore, we combined two...

The angular angelshark (Squatina guggenheim) is a coastal endangered angel shark from the Southwest Atlantic Ocean and one of the major bycatch victims. Despite major concerns about this species, little is known about its evolutionary connectivity across its whole geographic distribution. Here, genetic connectivity and phylogeographic patterns of S...

Resolving the identity, phylogeny and distribution of cryptic species within species complexes is an essential precursor to management. The bonnethead shark, Sphyrna tiburo, is a small coastal shark distributed in the Western Atlantic from North Carolina (U.S.A.) to southern Brazil. Genetic analyses based on mitochondrial markers revealed that bonn...

A correction to this paper has been published: https://doi.org/10.1007/s12686-021-01211-w

Over the last years, many studies have reported the challenge of precisely identifying shark and ray species from the fin trade. In Asia, the high demand for shark fin soup has resulted in correspondingly high prices for fins. This, in turn, has caused overexploitation of elasmobranch populations worldwide. Fin processing can cause the loss of morp...

Due to the morphological similarity between some billfish species, the International Commission for the Conservation of Atlantic Tunas (ICCAT) recommends the use of molecular tools to identify billfish at the species level to properly manage this imperiled group. In this study, species-specific swordfish and billfish identification was carried out...

• The dusky grouper Epinephelus marginatus is a large epinephelid species that occurs in the eastern and south‐western Atlantic and western Indian Oceans. Late maturity, protogynous hermaphroditism, site fidelity, and overfishing have all contributed to its demographic decline. • Connectivity and demography within a broad sampling of dusky grouper...

Since the Miocene profound climatic changes have influenced the biology and ecology of species worldwide, such as their connectivity, genetic population structure, and biogeography. The goal herein is to evaluate the phylogeography of sailfish Istiophorus platypterus between the Atlantic, Indian, and Pacific oceans. Our results evidenced a high gen...

Vagile, large-bodied marine organisms frequently have wide range dispersion but also dependence on coastal habitats for part of their life history. These characteristics may induce complex population genetic structure patterns, with resulting implications for the management of exploited populations. The scalloped hammerhead, Sphyrna lewini, is a co...

Sharks developed life history traits that make them susceptible to overfishing. This is, in turn, a risk for extinction, and several species are affected. The high price of shark fins in the international trade has triggered the widespread capture of sharks at unsustainable levels, prompting illegal and unethical practices, such as finning. To addr...

The angel sharks of the Squatina genus comprise 22 valid coastal benthic shark species, which inhabiting tropical and subtropical waters in continental shelves worlwide. Among these species, the angular angelshark, Squatina guggenheim, is an endangered endemic species from Southwest Atlantic with a limited range distribution between Espírito Santo...

Today, elasmobranchs are one the most threatened vertebrate groups worldwide. In fact, at least 90% of elasmobranch species are listed in the International Union for Conservation of Nature (IUCN) Red List, while more than 40% are data-deficient. Although these vertebrates are mainly affected by unsustainable fishery activities, bycatch is also one...

In this study we tested the use of mucus from five species of Neotropical marine batoid elasmobranchs to extract genomic DNA for barcoding and phylogenetic analysis. The DNA from all individuals sampled was successfully amplified and sequenced for molecular barcode, allowing 99–100% accuracy to the species level. This method proved to provide relia...

• The night shark, Carcharhinus signatus, is a mesopelagic, semi‐oceanic shark species found only in the Atlantic Ocean. It is one of the most frequently caught sharks in pelagic longline fisheries and is classified as Vulnerable by the International Union for the Conservation of Nature (IUCN). Despite their prevalence in commercial fisheries, the...

Many populations of elasmobranchs (sharks and rays) are experiencing severe declines due to the high demand for shark fins in Asia, the activities of unregulated fisheries, and increases in shark and ray catches. Recently, the effects of the decline in the populations of marine fish species on genetic diversity have drawn increasing attention; howe...

Occurrence of multiple whitetip reef sharks Triaenodon obesus in the Atlantic Ocean is reported for the first time from near a sunken ferry off the Paraná coast in south-eastern Brazil. This occurrence is hypothesized to have been caused by either a human introduction or a remarkably long oceanic displacement.

images relative to paper "Genetic Diversity of an Imperiled Neotropical Catfish and Recommendations for Its Restoration" doi.org/10.3389/fgene.2017.00196

Tables relative to paper "Genetic Diversity of an Imperiled Neotropical Catfish and Recommendations for Its Restoration" doi.org/10.3389/fgene.2017.00196

The long-whiskered catfish Steindachneridion parahybae (Family Pimelodidae) is endemic to the Paraíba do Sul River basin in southeastern Brazil. This species was heavily exploited by artisanal fisheries and faces challenges posed by dams, introduced species, and deterioration of critical habitat. The remaining populations are small and extirpated f...

SUPPLEMENTARY MATERIAL Supplementary material Figure S1. Bayesian skyline plot and mismatch distribution based on 707bp of the mitochondrial DNA control region of two lineages of the silky shark (Carcharhinus falciformis). Bayesian skyline plot showing the historical trends of female effective population sizes: (A) Lineage 1 (C) Lineage 2. Solid li...

Due to the morphological similarities among species, the International Commission for the Conservation of the Atlantic Tunas has recommended the use of diagnostic molecular tools to allow for robust species-level identifications of the billfishes. In this study, a protocol for the molecular identification of all six Atlantic billfishes was develope...

First reported occurrence of pregnant and neonato, Rhinoptera brasiliensis (Chondrichthyes, Rhinopteridae) caught off Guaruja city, São Paulo state, Brazil Abstract. This paper presents the occurrence pregnant female and neonate of Rhinoptera brasiliensis, Muller, 1836 caught off Pereque and Guaiuba beaches, Guaruja City, Sao Paulo State (23º59'18"...

The longbill spearfish (Tetrapturus pfluegeri; Istiophoridae) is an epipelagic billfish species broadly distributed in the Atlantic Ocean and exploited by multinational fisheries. No data exist on the population structure or genetic diversity of this apex predator, despite a strong need for this information to inform international conservation and...