A5024983512- Ichthyology and Marine Biology
- Fish Biology and Ecology Studies
- Fish biology, ecology, and behavior
- Fish Ecology and Management Studies
- Marine and fisheries research
- Identification and Quantification in Food
- Coral and Marine Ecosystems Studies
- Marine animal studies overview
- Aquaculture Nutrition and Growth
- Environmental DNA in Biodiversity Studies
- Cephalopods and Marine Biology
- Marine Ecology and Invasive Species
- Mercury impact and mitigation studies
- Turtle Biology and Conservation
- Microplastics and Plastic Pollution
- Paleontology and Evolutionary Biology
- Parasite Biology and Host Interactions
- Reproductive biology and impacts on aquatic species
- Amphibian and Reptile Biology
- Environmental Sustainability and Education
- Isotope Analysis in Ecology
- Plant and animal studies
- Genetic diversity and population structure
- Coastal and Marine Management
Universidade Federal do Paraná
2014-2025
Instituto de Pesca
2015-2016
Museu da Amazonia
2005-2014
Prefeitura Municipal de Curitiba
2006-2012
Museo de Historia Natural
2006
Universidade do Sul de Santa Catarina
2006
Abstract Understanding the trophic interactions and position of species within a foodweb is crucial if we want to understand dynamics marine communities impact individual components community have on network compartments. Recent studies indicated sharks rays are important elements foodwebs. In this study, evaluated ecological importance in subtropical ecosystem off coast southern Brazil by using topological analyses. We tested hypotheses that some elasmobranchs can be considered key foodweb,...
The diets of six shark species, Sphyrna lewini , zygaena Carcharhinus obscurus limbatus Rhizoprionodon lalandii and Galeocerdo cuvier were investigated in a subtropical coastal ecosystem southern Brazil. Stomach content data obtained to assess foraging niche segregation ontogenetic shifts the these sharks. Five species off Paraná coast ichthyophagous, with exception S . which was teutophagous. With G had generalist diet, other five displayed specialization their feeding. Ontogenetic observed...
Reductions of shark populations produce negative ecological and economic consequences. Overfishing is the primary threat to these reductions; however, two other indirect problems can be mentioned as threats sharks populations: meat mislabeling, attacks. In this study, we use Brazil an example focus on three critical related conservation: lack proper, specific identification landed species in industrial artisanal fisheries; attacks; mislabeling markets. We discuss situations, highlighting...
Otodus megalodon (Lamniformes: Otodontidae) is an iconic Neogene shark, but the lack of well-preserved skeletons has hampered our understanding various aspects its biology. Here, we reassess some biological properties using a new approach, based on known vertebral specimens O. and 165 species extinct extant neoselachian sharks across ten orders. Using median neurocranial caudal fin proportions relative to trunk proportion among non-mitsukurinid/non-alopiid lamniforms, show that could have...
Food partitioning between species is a common strategy for avoiding resource competition which allows the coexistence of two or more in same place. In order to evaluate feeding four batoids regularly caught by artisanal fisheries southern Brazil, present study aimed analyse and compare diet batoid species. The Chola guitarfish, Rhinobatos percellens , had specialized diet, consisting predominantly blue crabs Callinectes sp., followed teleost fish. Lesser guitarfish Zapteryx brevirostris also...
In Brazil, the demand for sustainably certified seafood is increasing and retailers have promised to source all from sustainable sources by 2015. southern portion of country, elasmobranch meat sold as cação, consumers are often unaware that cação refers any type elasmobranch. The present study used questionnaires investigate lay public’s knowledge in a Brazilian city. Shoppers were surveyed at supermarkets Curitiba, largest city Brazil. revealed people do not link commercialized sharks rays...
Abstract The fate of bycatch species released back into the water is crucial to estimate population status and consequent decisions implement adequate management measurements for elasmobranchs. shortnose guitarfish, Zapteryx brevirostris , an endemic Southwest Atlantic. It currently listed as ‘Vulnerable’ both in International Union Conservation Nature Brazilian red lists. Although this displays high tolerance capture transportation by fishers from site fish market, a significant reduction...
Human-mediated translocation of species is widely considered to be a serious problem for the conservation biodiversity. Documentation new records important understand causes extralimital introductions because their potential displace native and interfere with ecosystem functions. In Brazil, concern about documenting presence non-native fishes has predominantly focused on from other continents; relatively minor effort been devoted spread basins inside country. Here we summarize several...
Although it is largely assumed that shark predation and risk are unimportant to large cetaceans, whales can make up portions of the diets some species. We investigated interactions between sharks cetaceans in Abrolhos Bank (16°40′ 19°40′S), off eastern coast Brazil, including scavenging attempts on living humpback ( Megaptera novaeangliae ). In order determine frequency bites both postmortem, we used carcasses discovered along 2001 2010 photographs during systematic opportunistic visual...
The extinct megatooth shark, †Otodus megalodon, which likely reached at least 15 m in total length, is an iconic shark represented primarily by its gigantic teeth the Neogene fossil record.As one of largest marine carnivores to ever exist, understanding biology, evolution, and extinction †O.megalodon important because it had a significant impact on ecology evolution ecosystems that shaped present-day oceans.Some attempts inferring body form have been carried out, but they are all speculative...
Rhinobatos percellens is one of three species Rhinobatidae found on Brazilian shores and the most abundant shallow continental shelf Paraná Santa Catarina States. Specimens caught by artisanal fishery between July/2001 March/2003 fishing communities located frontier two southern States (Paraná Catarina) had their stomach contents analyzed. According to Alimentary Index (IAi), Decapoda (69%) Teleostei (22%) were main items consumed. Polychaeta, a common prey consumed several benthonic fishes,...
Interactions or conflicts between humans and large predators occur globally, but an understanding of their spatial occurrence associated media reporting remains limited. Media reach is now global rapid, particularly through western news outlets amplified by social networks. This has consequences for how the public perceive human-predator in turn this impacts species' conservation management. To address point, a literature search was undertaken to synthesize records predator-human followed be...
Feeding habits of the killifish Rivulus luelingi collected in a black water stream Coastal Atlantic Rainforest southern Brazil were investigated. Eight samplings made between April 2003 and January 2004. The diet, assessed through similarity matrix with estimated contribution values food items, included microcrustaceans, aquatic immature insects (larvae pupae), adult insects, terrestrial insect fragments, spiders, plant fragments. Differences diet according to temporal variations (months)...
Stomach contents of 175 Brazilian sharpnose sharks, Rhizoprionodon lalandii, were examined to assess their feeding habits. Caught by artisanal fishers between June 2006 and July 2007 at Ipanema Beach, on the central coast state Paraná, southern Brazil, R. lalandii appears be piscivorous (89.7% IRI), mainly families Clupeidae (5.1% IRI) Sciaenidae (3.7% secondarily squid Lolliguncula brevis (8.6% IRI). Diets similar sexes seasons. However, there ontogenetic changes in diets. The major items...