The Experts below are selected from a list of 14886 Experts worldwide ranked by ideXlab platform
Lalu Iqbal M Sani - One of the best experts on this subject based on the ideXlab platform.
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genetic population subdivision of the blue swimming crab portunus pelagicus across indonesia inferred from mitochondrial dna implication to Sustainable Fishery
PLOS ONE, 2021Co-Authors: Hawis Madduppa, R Martaulina, Zairion Zairion, R M Renjani, Mujizat Kawaroe, Nurlita Putri Anggraini, Beginer Subhan, I Verawati, Lalu Iqbal M SaniAbstract:The blue swimming crab (BSC), Portunus pelagicus (Linnaeus 1758), inhabits coastal areas of Southeast and East Asia, and is one of high fisheries commodities with an export value for Indonesia and an increasing global market demand, annually. However, the data of genetic diversity and their spatial connectivity of populations in Indonesia are not yet known, even when it is important to inform stock unit management and Sustainable use. This study aimed to determine the genetic diversity and differentiation of blue swimming crabs across Indonesian populations in different Fishery Management Area (FMA), and their spatial genetic connectivity, as well as to deliver implications for Sustainable Fishery. A total of 297 individuals were collected and amplified using cytochrome oxidase I mitochondrial DNA. This study has showed the highest values for haplotype and nucleotide diversity in the eastern part of Indonesia, where exploitation is relatively low. Significant genetic differentiation between populations (FST = 0.954; p < 0.001) and the fisheries management areas (FST = 0.964; p < 0.001) were revealed. Low spatial connectivity was observed between populations in a distance of at least more than 60 kilometers. This study suggests that BSC populations in Indonesia, likely have several stock units, and preferably different fisheries management plans and actions across the region thoroughly and simultaneously. This would be effective for management and their Sustainable conservation.
Kent Carpenter - One of the best experts on this subject based on the ideXlab platform.
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A popular and potentially Sustainable Fishery resource under pressure–extinction risk and conservation of Brazilian Sciaenidae (Teleostei: Perciformes)
Global Ecology and Conservation, 2015Co-Authors: Ning Labbish Chao, Flávia Lucena Frédou, Manuel Haimovici, Monica Brick Peres, Beth A. Polidoro, Marcelo Raseira, Rosana Subirá, Kent CarpenterAbstract:a b s t r a c t Croakers (Sciaenidae) are major Fishery resource in Brazil; constituting 22% of marine and 9% of freshwater Fishery landings. Croakers are subject to heavy fishing pressure throughoutBrazil,buthabitatalterationisalsoanimportantthreattoregionalpopulations. In this regional Sciaenidae assessment, each species was analyzed for relative risk of extinction, including the identification and quantification of the impact of major threats and existing conservation measures, based on application of the Categories and Criteria of the IUCN Red List of Threatened Species. Of the 52 species of Sciaenid fishes (34 marine and 18 freshwater) present in Brazilian waters, the majority are at low risk of extinction, with 10 species classified as Data Deficient (DD) and 36 as Least Concern (LC). However the Southern black drum (Pogonias cromis), listed as Endangered (EN) is the most threatened species in the region, while three other species are classified as Near Threatened (NT). A large portion of Brazilian croakers is landed by small-scale artisanal fisheries, which are scattered along coastal and riverine communities. However, our assessments reveal that available Fishery landing statistics may have greatly underestimated the artisanal Fishery production and by-catch of Sciaenids. We recommend establishing, with adequate enforcement, coastal and riverine protected areas as well as strategic fishing seasons to improve and maintain the conservation status of Sciaenids and Sustainable Sciaenid fisheries.
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a popular and potentially Sustainable Fishery resource under pressure extinction risk and conservation of brazilian sciaenidae teleostei perciformes
Global Ecology and Conservation, 2015Co-Authors: Ning Labbish Chao, Flávia Lucena Frédou, Manuel Haimovici, Monica Brick Peres, Beth A. Polidoro, Marcelo Raseira, Rosana Subirá, Kent CarpenterAbstract:a b s t r a c t Croakers (Sciaenidae) are major Fishery resource in Brazil; constituting 22% of marine and 9% of freshwater Fishery landings. Croakers are subject to heavy fishing pressure throughoutBrazil,buthabitatalterationisalsoanimportantthreattoregionalpopulations. In this regional Sciaenidae assessment, each species was analyzed for relative risk of extinction, including the identification and quantification of the impact of major threats and existing conservation measures, based on application of the Categories and Criteria of the IUCN Red List of Threatened Species. Of the 52 species of Sciaenid fishes (34 marine and 18 freshwater) present in Brazilian waters, the majority are at low risk of extinction, with 10 species classified as Data Deficient (DD) and 36 as Least Concern (LC). However the Southern black drum (Pogonias cromis), listed as Endangered (EN) is the most threatened species in the region, while three other species are classified as Near Threatened (NT). A large portion of Brazilian croakers is landed by small-scale artisanal fisheries, which are scattered along coastal and riverine communities. However, our assessments reveal that available Fishery landing statistics may have greatly underestimated the artisanal Fishery production and by-catch of Sciaenids. We recommend establishing, with adequate enforcement, coastal and riverine protected areas as well as strategic fishing seasons to improve and maintain the conservation status of Sciaenids and Sustainable Sciaenid fisheries.
Hawis Madduppa - One of the best experts on this subject based on the ideXlab platform.
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genetic population subdivision of the blue swimming crab portunus pelagicus across indonesia inferred from mitochondrial dna implication to Sustainable Fishery
PLOS ONE, 2021Co-Authors: Hawis Madduppa, R Martaulina, Zairion Zairion, R M Renjani, Mujizat Kawaroe, Nurlita Putri Anggraini, Beginer Subhan, I Verawati, Lalu Iqbal M SaniAbstract:The blue swimming crab (BSC), Portunus pelagicus (Linnaeus 1758), inhabits coastal areas of Southeast and East Asia, and is one of high fisheries commodities with an export value for Indonesia and an increasing global market demand, annually. However, the data of genetic diversity and their spatial connectivity of populations in Indonesia are not yet known, even when it is important to inform stock unit management and Sustainable use. This study aimed to determine the genetic diversity and differentiation of blue swimming crabs across Indonesian populations in different Fishery Management Area (FMA), and their spatial genetic connectivity, as well as to deliver implications for Sustainable Fishery. A total of 297 individuals were collected and amplified using cytochrome oxidase I mitochondrial DNA. This study has showed the highest values for haplotype and nucleotide diversity in the eastern part of Indonesia, where exploitation is relatively low. Significant genetic differentiation between populations (FST = 0.954; p < 0.001) and the fisheries management areas (FST = 0.964; p < 0.001) were revealed. Low spatial connectivity was observed between populations in a distance of at least more than 60 kilometers. This study suggests that BSC populations in Indonesia, likely have several stock units, and preferably different fisheries management plans and actions across the region thoroughly and simultaneously. This would be effective for management and their Sustainable conservation.
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genetic population subdivision of blue swimming crab portunus pelagicus across indonesia inferred from mitochondrial dna implication to Sustainable Fishery
bioRxiv, 2020Co-Authors: Hawis Madduppa, R Martaulina, Zairion Zairion, R M Renjani, Mujizat Kawaroe, Nurlita Putri Anggraini, Beginer Subhan, I Verawati, L M I SaniAbstract:The blue swimming crab (BSC), Portunus pelagicus (Linnaeus 1758), inhabits coastal areas of Southeast and East Asia, and is one of high fisheries commodity with export value for Indonesia and global market demand increasing annually. However, the data of genetic diversity and their spatial connectivity of populations in Indonesia are not yet known, which is important to inform unit stock management and Sustainable fisheries. This study aimed to determine genetic diversity and differentiation of blue swimming crab across Indonesia populations under different Fishery Management Area, and their spatial genetic connectivity, as well as implications for Sustainable Fishery. A total of 297 individuals were amplified using cytochrome oxidase I mitochondrial DNA. This study shown highest value of haplotype and nucleotide diversity in the eastern part of Indonesia, where exploitation is relatively low. Significant genetic differentiation between populations (FST = 0.954; p < 0.001) and the Fishery management regions (FST = 0.964; p < 0.001) were revealed. Low spatial connectivity was observed between populations in a distance of at least more than 60 kilometers. This study suggests that BSC populations in Indonesia likely have several unit stock, and preferably different fisheries management plan and action across the region thoroughly and simultaneously is effective for management and their Sustainable conservation.
Rachid Amara - One of the best experts on this subject based on the ideXlab platform.
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What can otolith shape analysis tell us about population structure of the European sardine, Sardina pilchardus, from Atlantic and Mediterranean waters?
Journal of Sea Research, 2015Co-Authors: Sherif Jemaa, Mahmoud Bacha, Khalef Rabhi, Gaby Khalaf, David Dessailly, Rachid AmaraAbstract:The European sardine, Sardina pilchardus, exhibits a complex population structure, which has produced conflicting results in previous genetic studies. Despite its importance in the fisheries industry, stock delineation for management and conservation purposes is still a matter of debate throughout the distribution range of the species. This study examines whether otolith shapes are more efficient than genetic markers to detect population structure in pelagic species with large population sizes. Sardines were analyzed from 15 sampling localities in the Northeast Atlantic and Mediterranean Sea covering almost the whole distribution range of the species. A combination of otolith shape indices and elliptic Fourier descriptors was investigated by multivariate statistical procedures. Within the studied area, three distinct groups were identified with an overall correct classification of 77%. Group A: northern Mediterranean Sea and Gulf of Gabès; group B: Atlantic Morocco–south Alboran–Algero-provençal coasts; and group C: European Atlantic coast. The Almeria–Oran front and the Gibraltar strait are not an efficient barrier for sardine population separation as there seems to be exchanges between populations of the south-western Mediterranean Sea and those of the Moroccan Atlantic Ocean coast or Gulf of Cadiz. The results are discussed in relation to environmental conditions, oceanographic features, and physical barriers to dispersal in the study area, and compared with those obtained by previous genetic, morphometric, and meristic data. For pelagic species with high gene flow, present results highlighted the need to take into account the identification of phenotypic stocks to ensure Sustainable Fishery benefits and efficient conservation as they may have unique demographic properties and responses to exploitation.
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what can otolith shape analysis tell us about population structure of the european sardine sardina pilchardus from atlantic and mediterranean waters
Journal of Sea Research, 2015Co-Authors: Sharif Jemaa, Mahmoud Bacha, Khalef Rabhi, Gaby Khalaf, David Dessailly, Rachid AmaraAbstract:The European sardine, Sardina pilchardus, exhibits a complex population structure, which has produced conflicting results in previous genetic studies. Despite its importance in the fisheries industry, stock delineation for management and conservation purposes is still a matter of debate throughout the distribution range of the species. This study examines whether otolith shapes are more efficient than genetic markers to detect population structure in pelagic species with large population sizes. Sardines were analyzed from 15 sampling localities in the Northeast Atlantic and Mediterranean Sea covering almost the whole distribution range of the species. A combination of otolith shape indices and elliptic Fourier descriptors was investigated by multivariate statistical procedures. Within the studied area, three distinct groups were identified with an overall correct classification of 77%. Group A: northern Mediterranean Sea and Gulf of Gabes; group B: Atlantic Morocco–south Alboran–Algero-provencal coasts; and group C: European Atlantic coast. The Almeria–Oran front and the Gibraltar strait are not an efficient barrier for sardine population separation as there seems to be exchanges between populations of the south-western Mediterranean Sea and those of the Moroccan Atlantic Ocean coast or Gulf of Cadiz. The results are discussed in relation to environmental conditions, oceanographic features, and physical barriers to dispersal in the study area, and compared with those obtained by previous genetic, morphometric, and meristic data. For pelagic species with high gene flow, present results highlighted the need to take into account the identification of phenotypic stocks to ensure Sustainable Fishery benefits and efficient conservation as they may have unique demographic properties and responses to exploitation.
Lotfi Rabaoui - One of the best experts on this subject based on the ideXlab platform.
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bycatch and discards of shrimp trawling in the saudi waters of the arabian gulf ecosystem impact assessment and implications for a Sustainable Fishery management
Fisheries Research, 2020Co-Authors: Ebrahim A A Abdulqader, Pulikkodan Abdurahiman, Lamjed Mansour, Abdel Halim Harrath, Mohammad A Qurban, Lotfi RabaouiAbstract:Abstract Shrimp trawl Fishery has evoked serious concerns at both regional and global levels due to its strong association with the bycatch and its significant contribution to the total global discards. Using three data methods (examination of fishermen log-books, questionnaire survey and observer monitoring), the bycatch and discards associated with shrimp trawl Fishery were studied, for two consecutive seasons (2013-2014 and 2014-2015), in the main shrimp fishing ground off Safaniya, along the Saudi coast in the Arabian Gulf. Safaniya fishing ground, with 37 large shrimp trawlers, was found to contribute a total shrimp catch of 500 to 755 t (up to 11% of the total national shrimp landings). Total bycatch (281-563 t) and discard (114-339 t) were substantial. A total of 104 fish and shellfish species were recorded in the bycatch, including 93 Osteichtyes, 3 Chondrichthyes, 6 Crustaceans and 3 Molluscs. The blue swimming crab, Portunus segnis, prevailed the bycatch (145-160 t), followed by the pharaoh cuttlefish Sepia pharaonis (2-16 t). Safaniya shrimp Fishery was found to have high impacts on the shrimp (Penaeus semisulcatus; target species) juveniles and other commercial species. Estimations of total number of turtles captured in the catch ranged between 1492 and 2018, indicating a serious threat of shrimp Fishery on local turtle populations. The results of this study emphasize the urgent need to adopt appropriate bycatch reduction devices in shrimp Fishery, in addition to enforcement of fisheries management regulations in order to protect the non-target resources and ensure a Sustainable shrimp production in the Arabian Gulf.
