A5006608601- Marine and fisheries research
- Fish Ecology and Management Studies
- Fish Biology and Ecology Studies
- Coral and Marine Ecosystems Studies
- Fish biology, ecology, and behavior
- Genetic diversity and population structure
- Ichthyology and Marine Biology
- Microbial Community Ecology and Physiology
- Marine Bivalve and Aquaculture Studies
- Identification and Quantification in Food
- Cephalopods and Marine Biology
- Isotope Analysis in Ecology
- Species Distribution and Climate Change
- Aquaculture Nutrition and Growth
- Agricultural Systems and Practices
- Veterinary Pharmacology and Anesthesia
- Radioactive contamination and transfer
- Physiological and biochemical adaptations
- Metallurgy and Material Science
- Wastewater Treatment and Nitrogen Removal
Universidade Federal do Rio Grande
2019-2024
Identifying populations and establishing the connectivity between neighbouring stocks are central issues for assessment management of coastal marine fish species. In this paper, we analysed population structure demersal sciaenid argentine croaker Umbrina canosai, endemic in warm, temperate southwestern Atantic southeastern Brazil (SE) Argentina, by combining two phenotypic techniques: otolith shape analysis growth rate. Three morphotypes were consistently identified, one northern latitudinal...
Abstract Ecological niche models (ENMs) and species distribution (SDMs) have been widely applied to various studies relevant biogeography, conservation biology, ecology. These modelling techniques seek develop spatial maps for projecting, among others past, current, future distributions. Born in the field of terrestrial ecology, only recent years these marine environmental issues, especially improve forecasting occurrences capturing fishery resources. This study aimed present through...
Abstract Otolith shape analysis is a powerful method for fish stock identification. We compared the otolith of Pagrus pagrus (Linnaeus 1758) along with its distribution in four south‐western Atlantic regions where it commercially fished: Rio de Janeiro, Grande do Sul southern Brazil, Argentine‐Uruguayan Common Fishing Zone (UA) and Argentinian Exclusive (AR). shapes were by Elliptical Fourier Wavelet coefficients among specimens size range similar otoliths, morphometric parameters ages. Four...
Abstract The population dynamics of the stout reef octopus, Octopus insularis fished with longlines pots in mid-shelf waters north-eastern Brazil was studied based on fishermen's logbooks and onboard monthly fishing trips from September 2009 to August 2010. Specimens marked oxytetracycline kept tanks for up 21 days provided evidence daily deposition growth increments lateral wall upper beaks. Sampled specimens weighed 50–1280 g had 43–172 increments. Compared congeneric species higher...
Experimental measurements were collected in the laboratory to evaluate maximum thermal limit and plasticity of Neotropical juvenile fish with different life habitats (demersal pelagic) from surf zone response a “heat-wave experiment”. Trials conducted using two temperature acclimations (Ta), including current average Southeastern Brazil (Ta: 14 days at 25°C) experiment” 30°C), simulating heat-wave event that occurs when daily more than five consecutive exceeds by 5°C. Typical species used:...
The intense exploitation since 1972 of the formerly only slightly exploited protogynous hermaphroditic fish Pagrus pagrus (L.) in southern Brazil has led less than a decade to collapse fishery, with no recovery four decades later. In this study we analized age structure, growth, reproduction and mortality species were studied based on samples collected from 1976 1985 provide baseline before onset overexploitation. Maximum estimated ages 21 26 years scale otolith readings, respectively. Mean...
Identifying changes in the population structure and dynamics for fish stocks is important to support its management. Data obtained from 1976 2019 allowed follow up long more than four decades life-history of Umbrina canosai , an intensely exploited demersal sciaenid southern Brazil. Intense fishing caused truncation length/age with loss most bigger/older fishes sex ratio change, increasing frequencies males. A considerable increase individual growth was observed attributed lower competition...
Abstract Age, growth, and maturity of the bluewing searobin Prionotus punctatus were studied to assess its stock status in southern Brazil. Total length compositions, weight, sex, stage recorded from commercial landings, ages estimated transverse sections sagittal otolith. The oldest observed specimen was a 12‐year‐old female. Females grew larger asymptotic ( L ∞ = 384.4 mm) than males 311.7 but at slower instantaneous rate k females 0.41 year −1 , 0.75 ). Reproduction occurred spring early...
Abstract A formerly unexploited stock of red porgy that was intensely fished along southern Brazil in the 1970s collapsed less than a decade. Subsequently, population dynamics or status has not been reported, so we updated growth parameters by analysis otolith annual‐increments and micro‐increments. Growth did change after collapsed, which suggested no density‐dependent effect. Given lack changes data‐limitation, used an age‐structured assessment model set until 1984 to forecast relative...
The red flounder Paralichthys orbignyanus is a large pleuronectiform fish endemic in coastal waters, lagoons and estuaries the southwestern Atlantic. Although less abundant than other spp, its high price makes it valuable resource for small-scale fishers that have been intensely fished last decades. To study growth lifespan southern Brazil, we examined thin otolith sections collected age determinations of both young-of-the-year (YOY) older fishes. Opaque bands form mainly spring summer,...
The surf zone is a highly dynamic environment subject to seasonal fluctuations which could impose restrictions the development of juvenile fish. allometric condition factor index (K) provides value ‘well-being’ for fish, been used compare populations under different environmental conditions. aim this study concerned on evaluate effect seasonality surf-zone fish’ K. Along two years K values main fish species were analyzed. temperature and abundance also reported. We compared...