A5055510573- Marine and fisheries research
- Ichthyology and Marine Biology
- Coral and Marine Ecosystems Studies
- Fish Biology and Ecology Studies
- Fish Ecology and Management Studies
- Marine Bivalve and Aquaculture Studies
- Fish biology, ecology, and behavior
- Aquaculture Nutrition and Growth
- Marine animal studies overview
- Oceanographic and Atmospheric Processes
- Marine and coastal plant biology
- Marine and coastal ecosystems
- Isotope Analysis in Ecology
- Turtle Biology and Conservation
- Statistical Methods and Applications
- Cephalopods and Marine Biology
Universidade Federal Rural do Semi-Árido
2015-2024
Universidade Federal de São Paulo
2016
Universidade Federal Rural de Pernambuco
2007-2015
University of Algarve
2004
Blue shark ( Prionace glauca ) is amongst the most abundant species in international trade, however this highly migratory has little effective management and need for spatio-temporal strategies increases, possibly involving vulnerable stage or sex classes. We combined 265,595 blue observations (capture satellite tag) with environmental data to present first global-scale analysis of species’ habitat preferences five size classes (small juveniles, large juvenile males females, adult females)....
Tuna Regional Fishery Management Organizations (tRFMOs) are increasingly interested in spatiotemporal management as a tool to reduce interaction rates with vulnerable species.We use blue shark (Prionace glauca) case study demonstrate the critical first steps implementation process, highlighting how predictions of global habitat for life stages can be transformed into publicly-accessible spatial bycatch mitigation tool.By providing examples possible goals and an associated threshold identify...
Abstract Carvalho, F. C., Murie, D. J., Hazin, H. V., G., Leite-Mourato, B., and Burgess, G. 2011. Spatial predictions of blue shark (Prionace glauca) catch rate probability juveniles in the Southwest Atlantic. – ICES Journal Marine Science, 68: 890–900. Generalized regression analysis spatial prediction was applied to per unit effort (cpue) data for caught by Brazilian tuna longline fleet between 1997 2008 (43 546 sets) predict effect environmental, spatial, temporal factors on...
The present study aims to characterize and compare the diet of bigeye yellowfin tunas caught on aggregated schools in western equatorial Atlantic Ocean. samples were collected from January 2011 June 2016. measured board stomachs removed after evisceration. analyzed regarding their Index Fullness importance each prey was estimated by Relative Importance (IRI). overlap assessed Morisita-Horn's Index, Non-Metric Multidimensional Scale (NMDS), Analysis Similarity (ANOSIM). feeding strategy...
Distribution and relative abundance of blue sharks (Prionace glauca) in the southwestern Atlantic Ocean was modeled based on catch-per-unit-effort (CPUE) per 1000 hooks length frequencies caught by Brazilian pelagic tuna longline fleet. As a measure abundance, CPUE 58 238 fishing sets fleet (national chartered), from 1978 to 2009, standardized Generalized Linear Model (GLM) using three different approaches: i) negative binomial error structure (log link); ii) traditional delta lognormal...
Abstract Spatial and temporal trends of sailfish catch rates in the southwestern equatorial A tlantic O cean relation to environmental variables were investigated using generalized additive models fishery‐dependent data. Two fit: (i) ‘spatio‐temporal’, including only latitude, longitude, month, year; (ii) ‘oceanographic’, sea surface temperature ( SST ), chlorophyll‐ a concentration, wind velocity, bottom depth, depth mixed layer year. The spatio‐temporal model explained more (average ~40%)...
In the present study, a cluster analysis, in relation to species composition of catches, was used classify 6,486 fishing sets by longline fleet based São Paulo State, Brazil, from 1998 2006. Based on proportions 12 and three broader groups, clusters were identified: C1: other fishes; C2: blue shark; C3: swordfish. Results indicated that targeted mainly shark swordfish also showed importance this fishery has been growing progressively trough years. Offshore areas exploited first fourth...
Pop-up satellite archival tags (PSATs) were deployed on four sailfish, Istiophorus platypterus, in the coastal waters of Rio de Janeiro State southeast Brazil during January and February 2009 (sailfish I II) between November 2010 2011 III IV). The total number days monitored (i.e., time that remained attached) 12 I), 51 II), 16 III) 43 results indicate a clear pattern vertical habitat utilization with majority spent concentrated near uniform sea surface layer occupying relatively narrow...
Generalized regression analysis and spatial prediction (GRASP) was applied to size data for sailfish (Istiophorus platypterus) better describe its preferential habitats in relation juveniles adults, based on environmental factors the equatorial southwestern Atlantic. We analyzed a total of 9954 lower jaw fork length (7541 fish caught by longline 2413 gillnet) from International Commission Conservation Atlantic Tunas database 1998 2007. Four main variables were considered: sea surface...
In the present study, a generalized linear model (GLM), assuming Tweedie distribution and log as link function, was used to generate standardized catch per unit effort (CPUE) series for sailfish caught by sport fishing boats based in São Paulo, Rio de Janeiro, Espírito Santo Bahia States, from 1996 2014. The response variable number of registered tournament day. following factors were tested analyses: "year" "month" "local" representing main effects explanatory variables. overall pattern...
O presente trabalho teve como objetivo caracterizar a composição das capturas na pesca de atuns e afins em cardumes associados no Atlí¢ntico Oeste Equatorial, realizadas por parte da frota sediada Município Areia Branca, RN. Para tanto foram acompanhados 109 desembarques nos cais pesqueiros cidade, oriundos nove embarcações com comprimento total médio 13,4 m, período entre junho 2010 maio 2013. Além disso, também realizados embarques fevereiro 2011 dezembro 2012, durante os quais foi...
A Generalized Additive Model (GAM) was fitted to blue shark, Prionace glauca (Linnaeus, 1758), CPUE data (shark numbers per 100 hooks) from tuna longliners based in São Paulo State, Brazil, between 1998 and 2006, with the aim observe their relationship environmental, spatial temporal information. GAM model accounted for 42% of variance nominal CPUE. Stepwise revealed relative importance eight variables by decreasing magnitude, namely latitude, year, month, longitude, chlorophyll-a...
This study presents data and estimates reproductive parameters of the sailfish Istiophorus platypterus (Shaw, 1792) in western Atlantic, useful for future stock assessments species Atlantic Ocean. During period 2006–2011, a total 1132 fish were sampled by scientific observers on board Venezuelan Brazilian longline vessels from artisanal fisheries based out Cumaná, Puerto La Cruz Playa Verde, Venezuela Cabo Frio, Rio de Janeiro, Brazil. The ovaries 543 females classified into five ovarian...