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Priscila F.m. Lopes - One of the best experts on this subject based on the ideXlab platform.

  • A spatial multivariate approach to understand what controls species Catch Composition in small-scale fisheries
    Fisheries Research, 2016
    Co-Authors: M. Grazia Pennino, Mario J. F. Thomé-souza, Adriana Rosa Carvalho, Luiz Carlos Da Silveira Fontes, Cristiano Parente, Priscila F.m. Lopes
    Abstract:

    Abstract Many multivariate methods have been applied to small-scale fishery data in an attempt to distinguish factors that characterize the fishing activity and influence Catch Composition. While such approaches are important, they are still incomplete for including the spatial structuring in the analysis, a non-random fundamental and functional component of the ecosystem. This study fills this gap by identifying, describing, and quantifying factors that influence the fleet type of tropical small-scale fisheries using a multivariate spatial approach. The example data came from two Brazilian States where two main fleets, open water canoes and motorized boats, operate. Different complex combinations of fishing, environmental and spatial factors affect the structure of the fish Catch Composition of each fleet. Motorized boats showed strong spatially-structured species Catch Composition in comparison with open water canoes. Similar environmental factors, such as type of the seabed and depth, but different fishing variables (gear vs crew size), affected the species Catch Composition of these vessel categories. Despite some overlap, each fleet focuses on a relatively distinct set of species groups and exploits habitats at different spatial scales. These results suggest that different sets of regulations should be considered for each fleet type within a specific spatial scale. It also shows that multi-species models that aggregate groups of species is a more efficient alternative than single-species assessment models for small-scale fisheries, as these are multi-specific and multi-gear, with scattered landing harbors, features that make such fisheries a complex challenge for management.

M. Grazia Pennino - One of the best experts on this subject based on the ideXlab platform.

  • A spatial multivariate approach to understand what controls species Catch Composition in small-scale fisheries
    Fisheries Research, 2016
    Co-Authors: M. Grazia Pennino, Mario J. F. Thomé-souza, Adriana Rosa Carvalho, Luiz Carlos Da Silveira Fontes, Cristiano Parente, Priscila F.m. Lopes
    Abstract:

    Abstract Many multivariate methods have been applied to small-scale fishery data in an attempt to distinguish factors that characterize the fishing activity and influence Catch Composition. While such approaches are important, they are still incomplete for including the spatial structuring in the analysis, a non-random fundamental and functional component of the ecosystem. This study fills this gap by identifying, describing, and quantifying factors that influence the fleet type of tropical small-scale fisheries using a multivariate spatial approach. The example data came from two Brazilian States where two main fleets, open water canoes and motorized boats, operate. Different complex combinations of fishing, environmental and spatial factors affect the structure of the fish Catch Composition of each fleet. Motorized boats showed strong spatially-structured species Catch Composition in comparison with open water canoes. Similar environmental factors, such as type of the seabed and depth, but different fishing variables (gear vs crew size), affected the species Catch Composition of these vessel categories. Despite some overlap, each fleet focuses on a relatively distinct set of species groups and exploits habitats at different spatial scales. These results suggest that different sets of regulations should be considered for each fleet type within a specific spatial scale. It also shows that multi-species models that aggregate groups of species is a more efficient alternative than single-species assessment models for small-scale fisheries, as these are multi-specific and multi-gear, with scattered landing harbors, features that make such fisheries a complex challenge for management.

Zhang Peng - One of the best experts on this subject based on the ideXlab platform.

  • Preliminary analysis of gillnet Catch Composition of Scomberomorus in northern South China Sea
    South China Fisheries Science, 2013
    Co-Authors: Zhang Peng
    Abstract:

    We conducted a gillnet fishery survey during April 21~24,2012 in northern South China Sea to obtain the information of the fishery S.comunersomi including Catch Composition,biological characteristics of domain species and percentage of immature fish,etc..Moreover,we discussed the capturing parts of the domain species.The results show that the dominant species of gillnet fishery are S.commersoni,S.guttatus and Formio niger,whose IRI are 10 969.80,5 502.49,1 937.34 and dominant groups of body length are 701~800 mm,501~600 mm,231~250 mm,respectively.To achieve sustainable development of gillnet fishery for Scomberomorus,it is suggested that optimum capture length for the domain species be determined,experiments of fishing gear selectivity be conducted,and relative management measures for minimum mesh size be formulated.

  • Preliminary analysis on Catch Composition of gillnet fishery for Harpodon nehereus in north part of the South China Sea
    Guangdong Agricultural Sciences, 2013
    Co-Authors: Zhang Peng
    Abstract:

    In order to obtain Catch Composition,the biological character of main species and the percentage of immature fish,survey of gillnet fishery for Harpodon nehereus was conducted September 2012 in north part of the South China Sea.The result indicated that the dominant species of the gillnet fishery were Harpodon nehereus,Johnius dussumieri,Sardinella aurita and Ilisha elongata.Their IRI were 11 831.24,2 118.43,1 154.70 and 1 118.87,respectively;and their dominant groups of body length were 201~200 mm,131~150 mm,151~160 mm and 161~180 mm,respectively.Finally,in order to obtain a sustainable gillnet fishery for H.nehereus,the optimum first capture standard length of H.nehereus was suggested to be promulgated.

  • The Catch Composition of light falling-net fishing and its impact on fishery resources in the northern South China Sea.
    South China Fisheries Science, 2009
    Co-Authors: Yang Lin, Zhang Xufeng, Tan Yongguang, Zhang Peng
    Abstract:

    In recent years,a light falling-net fishery was rapidly developped in the South China Sea.It has increased fishing pressure on juvenile fish resources living in the northern shallow waters of South China Sea. A survey of the Catch Composition of light falling-net fishing was conducted on fishing ground along waters off Yangjiang,Guangdong Province,from April 27 to May 2,2006,in order to identify Catch Composition of the net and its impact on fishery resources. The results showed that: (1) The main species caught were phototactic fish and cephalopod,including Loligo sp.,Trichiurus haumela,Decapterus maruadsi,Scomberomorus commerson,Psenopsis anomala,Sepia sp.,Thrissa kammalensis,Formio niger,Thryssa dussumieri and Trachurus japonicus;(2) The net had high Catch rates of juveniles and might tend to damage marine fishery resources;(3) The main causes resulting in the high rates were smaller mesh size,greater light intensity and fishing ground closing to inshore. It is recommended that the regulation of the minimum mesh size be implemented and the management of the fishing gear be strengthened.

  • Analysis of the Catch Composition of small shrimp-beam-trawl net in shallow waters of Pearl River Estuary,China
    South China Fisheries Science, 2008
    Co-Authors: Zhang Peng
    Abstract:

    Shrimp trawling is a main fishing method of shrimp fishery along Guangdong coastal sea of China.We carried out,from October to November 2006,a survey of the Catch Composition of small shrimp-beam-trawler fishing in the shallow waters of the Pearl River Estuary,China,in order to identify the Composition of the Catches and the impact of the trawling on fisheries resources.Results showed that the Catch was diverse in species and complex in Composition,with high percentage of juvenile and by-Catch.Main species caught were Metapenaeus joyneri(18.57%),Portunus hastatoides(15.48%),Exopalaemon carinicauda(11.50%)and Penaeus monodon(11.16%),shrimp(M.ensis,E.carinicauda)and fish(Argyrosomus argentatus,Muraenesocidae,Pampus argenteus)were 100% juvenile in Catches,with percentage of juvenile for Coilia mystus and Collichthys lucidus up to 87.65% and 96.15%,respectively.The targeting species were shrimps(M.joyneri,E.carinicauda,and P.monodon).Non-target Catches were mostly fishes and crabs.This study suggested that the trawling method is supposed to be harmful to fishery resources.

Mario J. F. Thomé-souza - One of the best experts on this subject based on the ideXlab platform.

  • A spatial multivariate approach to understand what controls species Catch Composition in small-scale fisheries
    Fisheries Research, 2016
    Co-Authors: M. Grazia Pennino, Mario J. F. Thomé-souza, Adriana Rosa Carvalho, Luiz Carlos Da Silveira Fontes, Cristiano Parente, Priscila F.m. Lopes
    Abstract:

    Abstract Many multivariate methods have been applied to small-scale fishery data in an attempt to distinguish factors that characterize the fishing activity and influence Catch Composition. While such approaches are important, they are still incomplete for including the spatial structuring in the analysis, a non-random fundamental and functional component of the ecosystem. This study fills this gap by identifying, describing, and quantifying factors that influence the fleet type of tropical small-scale fisheries using a multivariate spatial approach. The example data came from two Brazilian States where two main fleets, open water canoes and motorized boats, operate. Different complex combinations of fishing, environmental and spatial factors affect the structure of the fish Catch Composition of each fleet. Motorized boats showed strong spatially-structured species Catch Composition in comparison with open water canoes. Similar environmental factors, such as type of the seabed and depth, but different fishing variables (gear vs crew size), affected the species Catch Composition of these vessel categories. Despite some overlap, each fleet focuses on a relatively distinct set of species groups and exploits habitats at different spatial scales. These results suggest that different sets of regulations should be considered for each fleet type within a specific spatial scale. It also shows that multi-species models that aggregate groups of species is a more efficient alternative than single-species assessment models for small-scale fisheries, as these are multi-specific and multi-gear, with scattered landing harbors, features that make such fisheries a complex challenge for management.

Adriana Rosa Carvalho - One of the best experts on this subject based on the ideXlab platform.

  • A spatial multivariate approach to understand what controls species Catch Composition in small-scale fisheries
    Fisheries Research, 2016
    Co-Authors: M. Grazia Pennino, Mario J. F. Thomé-souza, Adriana Rosa Carvalho, Luiz Carlos Da Silveira Fontes, Cristiano Parente, Priscila F.m. Lopes
    Abstract:

    Abstract Many multivariate methods have been applied to small-scale fishery data in an attempt to distinguish factors that characterize the fishing activity and influence Catch Composition. While such approaches are important, they are still incomplete for including the spatial structuring in the analysis, a non-random fundamental and functional component of the ecosystem. This study fills this gap by identifying, describing, and quantifying factors that influence the fleet type of tropical small-scale fisheries using a multivariate spatial approach. The example data came from two Brazilian States where two main fleets, open water canoes and motorized boats, operate. Different complex combinations of fishing, environmental and spatial factors affect the structure of the fish Catch Composition of each fleet. Motorized boats showed strong spatially-structured species Catch Composition in comparison with open water canoes. Similar environmental factors, such as type of the seabed and depth, but different fishing variables (gear vs crew size), affected the species Catch Composition of these vessel categories. Despite some overlap, each fleet focuses on a relatively distinct set of species groups and exploits habitats at different spatial scales. These results suggest that different sets of regulations should be considered for each fleet type within a specific spatial scale. It also shows that multi-species models that aggregate groups of species is a more efficient alternative than single-species assessment models for small-scale fisheries, as these are multi-specific and multi-gear, with scattered landing harbors, features that make such fisheries a complex challenge for management.