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Johnatas Adelir Alves

Johnatas Adelir Alves
Instituto COMAR - Conservação Marinha do Brasil · Marine biology

Ph.D.

About

35
Publications
11,772
Reads
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291
Citations
Citations since 2017
21 Research Items
246 Citations
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20172018201920202021202220230204060
Introduction
Marine Biologist, PhD in Zoology at Federal University of Paraná, Brazil. Main scientific interests: marine biodiversity, scientific diving, reef fish, fishing survey and marine conservation.
Additional affiliations
March 2015 - March 2019
Universidade Federal do Paraná
Position
  • Marine Biologist
March 2011 - March 2013
Universidade Estadual de Santa Cruz
Position
  • Master's Student
January 2006 - present
Instituto Meros do Brasil
Position
  • Marine biologist

Publications

Publications (35)
Article
Full-text available
A ghost fishing experiment was conducted using gillnets in a rocky reef off the state of Santa Catarina, southern Brazil. Scuba divers monitored changes in the structure of the nets and catches for 92 days. One hundred and twenty-six entangled animals were observed, including target and non-target fishing species: 13 teleosts (N = 52; 43%) and four...
Book
Full-text available
Guia de boas práticas de pesque-solte Projeto Meros do Brasil 2002-2021 – Todos os direitos reservados O E-book está disponível para download gratuito no site: www.merosdobrasil.org
Article
Full-text available
In this study, the relationship between fish assemblage structure and environmental factors was analyzed in a bay in southern Brazil. Fish were collected every two months between February and December 2002 at six sampling sites using bottom trawl nets. Abiotic data (salinity, temperature, rainfall, and depth) and biotic data (number of individuals,...
Technical Report
Full-text available
Newsletter of the Groupers & Wrasses Specialist Group of the International Union for the Conservation of Nature
Article
Full-text available
The composition of estuarine fish fauna is dynamic and complex. Despite the variation in fish fauna in estuaries, it is possible to observe some species associated with microhabitats. The assemblage composition of these communities is apparently derived from habitat selection. The aim of this study was to assess the structure of the demersal fish f...
Article
Sandstone reefs may be considered a unique geomorphologic feature within the subtropical Southwestern Atlantic Ocean region; however, biodiversity on these reefs has received little to no attention. Herein, we recorded the fish assemblage and benthic cover of sandstone reefs between 23 and 29 m depth in Southern Brazil and evidenced potential threa...
Article
Morphometric measurements, meristic counts and DNA barcoding identified the presence of a biglip grunt Plectorhinchus macrolepis in the western Atlantic Ocean. As the species is endemic to the tropical eastern Atlantic Ocean and has not previously been reported in the western Atlantic Ocean, we discuss the possible means by which it might have disp...
Article
Full-text available
The Atlantic spadefish, Chaetodipterus faber, is an economically important species along the Southwest Atlantic Ocean, especially in the southeastern-south Brazil. Despite this, knowledge about stock structure is scarce and, at present, is no formal management strategy to ensure the long-term sustainability of the C. faber fishery in Brazil. In ord...
Article
To promote marine conservation and sustainable resources use it is highly important to understand reef fish population structure and dynamics. The sergeant major, Abudefduf saxatilis, is a common and abundant fish usually found in the Brazilian coasts, being considered a keystone-species for structuring benthic communities on reef habitats in the A...
Chapter
Full-text available
Megalops atlanticus extinction risk assessment in Brazil
Article
A single Pomacanthus maculosus was filmed during a scuba diving survey on a rocky reef from southern Brazil. The body shape and coloration pattern confirmed the species identification. The biological and ecological characteristics of P. maculosus and the long distance of Brazil from its original distribution strongly suggest of an anthropogenic pat...
Conference Paper
Full-text available
The most common and abundant pomacentrid Atlantic species is the sergeant major Abudefduf saxatilis. A recent study showed no genetic regional differentiation among A. saxatilis from the Brazilian coast. Otoliths can be an alternative and complementary approach to unravel population structure of marine fish with high gene flow, but living in enviro...
Article
Full-text available
We describe an uncommon record of Threadfin on rocky reef. The aim is to fill gaps in ecological knowledge of habitat use and provides baseline information on the feeding ecology of Threadfin. Details on the record, habitat and behavior of the observed individuals are described and discussed.
Article
Full-text available
In the present paper, we document a recent record of the Bannerfish, an Indo-Pacific species, in the southwest Atlantic Ocean and comment on biological aspects of the Azores Chromis, an invasive reef fish in the western Atlantic Ocean. We suggest that investigations of invasive species along the Brazilian coast can use data provided by citizen scie...
Article
Full-text available
The most common and abundant pomacentrid Atlantic species is the sergeant major Abudefduf saxatilis. A recent study showed no genetic regional differentiation among A. saxatilis from the Brazilian coast. Otoliths can be an alternative and complimentary approach to unravel population structure of marine fish with high gene flow, but living in enviro...
Article
Full-text available
The capture of marine animals caused by abandoned, lost or otherwise discarded fishing gear (ALDFG) is known as ghost fishing. The objective of this study was to analyze the occurrence and causes of ghost fishing in shallow rocky reefs of the state off Santa Catarina, southern Brazil. The search for ALDFG was performed by scuba diving in 28 sites b...
Conference Paper
Full-text available
Territorial reef fishes, such as damselfishes species (Pomacentridae), can influence the composition, diversity and relative abundances of algae and invertebrate communities (e.g. corals) in tropical and subtropical reefs. The present study aimed to analyzed and characterize, through stomach content analysis and underwater observations, the foragin...
Conference Paper
Full-text available
Pomacentrids are one of the most numerous groups occurring on tropical reefs, in terms of both number of species and number of individuals. Live in coral and rocky reefs, but also common in other shallow-water habitats, like seagrass beds. Most species are highly territorial, especially during reproductive periods. The sergeant major, Abudefduf sax...
Conference Paper
Full-text available
http://www.frontiersin.org/MyFrontiers/Events/AbstractDetails.aspx?ABS_DOI=10.3389/conf.FMARS.2015.03.00047
Article
Full-text available
Developing survey strategies for threatened species is often limited by access to sufficient individuals to acquire information needed to design appropriate conservation measures. The goliath grouper (Epinephelus itajara) is a large reef fish, globally classified as critically endangered. In Brazil, fishing has been prohibited since 2002. Herein we...
Article
Full-text available
Background Local Ecological Knowledge (LEK) of traditional fishermen may be the only source of information regarding the conservation of the marine ecosystem and its endangered species. One of these species is Epinephelus itajara, which can exceed 2 m in length and 400 kg weight, is classified by the IUCN as a critically endangered. In Brazil, ther...
Article
Full-text available
Herein, we describe the use of scars to photo-identify the goliath grouper,Epinephelus itajara. Three individuals were photoidentified and re-sighted several times at the same site along the Brazilian coast, including the longest report for site fidelity, with more than four years.
Conference Paper
Full-text available
Developing survey strategies for rare and threatened species is often limited by access to sufficient individuals to acquire information needed to design appropriate conservation measures. The goliath grouper (Epinephelus itajara) is a globally threatened reef fish. In Brazil, fishing has been prohibited over 11 years and one of the policy prescrip...
Conference Paper
Full-text available
Photo-identification (photo-iD) is a widely utilized approach on a variety of marine species including marine mammals, sea turtles and cartilaginous fish, providing a single non-invasive mark-recapture technique, which is critical for threatened species such as the goliath grouper, Epinephelus itajara. Photographic records came from the Participati...
Conference Paper
Full-text available
Several studies around the world show that fishes from the Serranidae family display body color variations, as a tool to communicate and socialize with others fishes of the same species. These variations are more common during aggregations. The rarity, and the difficulty of observing an Epinephelus itajara aggregation, could be the reason that the...
Conference Paper
Full-text available
The Goliath grouper occurs along the Atlantic west coast, from Florida to Santa Catarina, and in the west of Africa; inhabiting coral and artificial reefs, rocky shores and mangroves. Its slow growth and reproductive rates, and its group spawning behavior, make it particularly vulnerable to overfishing. In Brazil, the decline of populations, the lo...
Article
Full-text available
O presente estudo tem como objetivo descrever quantitativamente a estrutura das comunidades de peixes recifais no município do Balneário Barra do Sul, litoral norte do Estado de Santa Catarina. Foram selecionadas duas áreas amostrais, a Ilha Tipitinga e Ilha dos Lobos, e realizadas quatro campanhas de campo entre fevereiro e julho de 2006. Os dados...
Article
Full-text available
The present study aims to describe the structure of reef fish communities in Balneário Barra do Sul, northern coast of Santa Catarina state. Field campaigns were conducted in Tipitinga and Lobos Island, between February and July 2006. Data were collected using underwater visual census method. Were recorded 3055 individuals, of 31 families and 51 sp...
Article
Full-text available
The first occurrence for Azores Chromis in the south-western Atlantic is given with photographic records and meristics.

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Projects

Projects (5)
Project
The lack of information about fish stocks in the Ribeira Valley, south of São Paulo, has led to the disorderly exploitation of fishery resources of social and economic value. In view of this scenario, the present study will investigate the habitat use by the broadband anchovy, Anchoviella lepidentostole, and the fat snook, Centropomus parallelus, in the Ribeira de Iguape River Basin, an important fishing area of Southeastern Brazil. Through the chemical composition of the otoliths, it is expected is expected to gain a better understanding about the habitat use, especially the migratory patterns, of these two important species of anadromous fish. The results may have direct application in the management of these resources, since the tendency of overexploitation of both species in the region since the 1990s has been reported.
Project
Learn about population structure and ecology of the sergeant major, using many techniques, like otolith analysis (shape indices, elliptic Fourier descriptors and microchemistry), molecular genetics (COI and D-loop), ontogenetic development (embryonic, larval and settlement stages), larval dispersal (recruitment/self-recruitment) and connectivity.