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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Theoretical and applied genetics 98 (1999), S. 496-501 
    ISSN: 1432-2242
    Keywords: Key words Helianthus annuus ; Sunflower mutant ; Palmitic acid ; Inheritance ; Fatty acid composition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Sunflower genotypes with increased levels of palmitic acid (C16 : 0) in the seed oil could be useful for food and industrial applications. The objective of the present study was to determine the inheritance of the high C16 : 0 content in the sunflower mutant line CAS-5 (〉25% of the total oil fatty acids). This mutant was reciprocally crossed with the lines HA-89 (5.7% C16 : 0) and BSD-2-691 (5.4% C16 : 0), the latter being the parental line from which CAS-5 was isolated. No maternal effect for the C16 : 0 content was observed from the analysis of F1 seeds in any of the crosses. The inheritance study of the C16 : 0 content in F1, F2 and BC1F1 seeds from the crosses of CAS-5 with its parental line BSD-2-691 indicated that the segregation fitted a model of two alleles at one locus with partial dominance for the low content. The analysis of the fatty acid composition in the F2 populations from the crosses with HA-89 revealed a segregation fitting a ratio 19 : 38 : 7 for low (〈7.5%), middle (7.5–15%), and high (〉25%) C16 : 0 content, respectively. This segregation was explained on the basis of three loci (P1, P2, P3) each having two alleles showing partial dominance for low content. The genotypes with a high C16 : 0 content were homozygous for the recessive allele p1 and for at least one of the other two recessive alleles, p2 or p3. This model was further confirmed with the analysis of the F3 and the BC1F1 generations. It was concluded that both the recessive alleles p2 and p3 were already present in the BSD-2-691 line, the allele p1 being the result of a mutation from P1. This genetic study will facilitate breeding strategies associated with the incorporation of the high C16 : 0 trait into agronomically acceptable sunflower hybrids.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-2242
    Keywords: Key words Sunflower ; Helianthus annuus ; High palmitic acid ; High stearic acid ; Epistatic interaction ; Inheritance ; Oil quality
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Two sunflower (Helianthus annuus L.) mutants with high concentrations of saturated fatty acids in their seed oil have been identified and studied extensively. The mutant line CAS-5 has high concentrations of palmitic acid (C16:0) (〉25% compared with 7% in standard sunflower seed oil) and low-C18:0 values (3%). CAS-3 is characterized by its high levels of stearic acid (C18:0) (〉22% compared with 4% in standard sunflower seed oil) and a low-C16:0 content (5%). CAS-5 also possesses elevated levels of palmitoleic acid (C16:1) (〉5%), which is absent in standard sunflower seed oil. The objective of this study was to determine the relationships between the loci controlling the high-C16:0 and the high-C18:0 traits in these mutants. Plants of both mutants were reciprocally crossed. Gas chromatographic analyses of fatty acids from the seed oil of F1, F2, F3 and the BC1F1 to CAS-5 generations indicated that the loci controlling the high-C16:0 trait exerted an epistatic effect over the loci responsible for the high-C18:0 character. As a result, the phenotypic combination containing both the high-C16:0 levels of CAS-5 and the high-C18:0 levels of CAS-3 was not possible. However, phenotypes with a saturated fatty acid content of 44% (34.5% C16:0+9.5% C18:0) were identified in the F3 generation. These are the highest saturated (C16:0 and C18:0) levels reported so far in sunflower seed oil. When F3 C16:0 segregating generations in both a high- and a low-C18:0 background were compared, the high-C16:1 levels were not expressed as expected in the high-C18:0 background (CAS-3 background). In this case, the C16:1 content decreased to values below 1.5%, compared with 〉5% in a low-C18:0 background. As the stearoyl-ACP desaturase has been reported to catalyze the desaturation from C16:0-ACP to C16:1-ACP, these results suggested that a decrease in its activity was involved in the accumulation of C18:0 in the high-C18:0 mutant CAS-3.
    Type of Medium: Electronic Resource
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  • 3
    Publication Date: 2021-06-29
    Description: Stock assessments can be problematic because of uncertainties associated with the data or because of simplified assumptions made when modeling biological processes (Rosenberg and Restrepo, 1995). For example,the common assumption in stock assessments that stocks are homogeneous and discrete (i.e., there is no migration between the stocks) is not necessarily true (Kell et al., 2004a, 2004b).
    Keywords: Biology ; Ecology ; Fisheries
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 140-146
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  • 4
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    In:  http://aquaticcommons.org/id/eprint/9481 | 115 | 2012-10-08 09:35:51 | 9481 | WorldFish Center
    Publication Date: 2021-07-06
    Description: Fisheries conflicts are among the persistent problems affecting the security of food, livelihoods and fishing environments crucial to poor fishing communities in developing countries in South and Southeast Asia. Most conflicts arise from excessive fishing efforts due to increasing population and economic motivations. Conflicts are not all undesirable as some disputes become a catalyst for much needed reforms for policy and economic improvements. However, a framework for analyzing conflicts in fisheries is necessary to organize interventions relevant to the nature of conflicts, and the needs and capacities of fisheries stakeholders in the region. The WorldFish Center, together with research partners, conducted studies that identify a framework for managing fisheries conflicts. Thematic policy recommendations for managing fishing capacity and related conflicts in small-scale fisheries in the region are identified for further consideration by fisheries stakeholders.
    Keywords: Fisheries ; Fishery disputes
    Repository Name: AquaDocs
    Type: article
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  • 5
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    In:  http://aquaticcommons.org/id/eprint/9264 | 115 | 2012-11-30 08:59:02 | 9264 | WorldFish Center
    Publication Date: 2021-07-04
    Description: The Cogtong Bay experience represents a bold attempt to pursue a shared responsibility between the government and local residents for rehabilitating coastal resources. Some of the factors that provided the impetus to co-management arrangements were the recognition of resource management problems, dependence on coastal resources for livelihood and the desire for more sustainable resource use. This paper draws attention to the importance of legitimate user/property rights, vigilant law enforcement efforts, common commitment among stakeholders and continuing support from local leadership in viable co-management arrangements.
    Keywords: Ecology ; Fisheries ; Mangrove swamps ; Coastal zone management ; Resource management ; Popular participation ; Cogtong Bay ; Bohol ; Philippines
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 46-52
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  • 6
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    WorldFish Center | Penang, Malaysia
    In:  http://aquaticcommons.org/id/eprint/1282 | 115 | 2011-09-29 20:52:14 | 1282 | WorldFish Center
    Publication Date: 2021-07-07
    Description: As a step to address the problems of coastal fisheries in Asia, the WorldFish Center joined forces with fisheries agencies from eight developing Asian countries (Bangladesh, India, Indonesia, Malaysia, The Philippines, Sri Lanka, Thailand and Vietnam) and the Asian Development Bank, to implement a project entitled “Sustainable Management of Coastal Fish Stocks in Asia” (also known as the “TrawlBase” project). The project was implemented between 1998 and 2001. The main achievements of this partnership were: (a) Development of a database called “Fisheries Resource Information System and Tools” (FiRST), which contains trawl research survey data and socioeconomic information for selected fisheries, and facilitates its analysis; (b) Evaluation of the extent of resource decline and over-fishing, both biological and economic, in the region; (c) Identification of the measures needed to manage coastal fisheries in the participating countries, resulting in draft strategies and action plans; and (d) Strengthening of national capacity in coastal fisheries assessment, planning and management.
    Keywords: Fisheries ; Fishery management ; Coastal fisheries ; Southeast Asia ; Bangladesh ; India ; Sri Lanka
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
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    Format: 1-40
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  • 7
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    In:  http://aquaticcommons.org/id/eprint/9194 | 115 | 2012-11-28 13:41:34 | 9194 | WorldFish Center
    Publication Date: 2021-07-03
    Description: This article presents an overview of the project on Rehabilitation of Fisheries and Aquaculture in Tsunami-affected Coastal Communities in Aceh Province. Building on the research results from the recently completed projects detailed in the previous articles, this project shall synthesize information on coastal fishing communities and resources in order to develop site-specific management options to support rehabilitation of fisheries and aquaculture.
    Keywords: Fisheries ; Disasters ; Coastal zone ; ISEW ; Indonesia ; Aceh
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 36-38
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  • 8
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    In:  http://aquaticcommons.org/id/eprint/9412 | 115 | 2012-10-11 04:23:32 | 9412 | WorldFish Center
    Publication Date: 2021-07-05
    Description: The diet composition of fish caught in San Miguel Bay, Philippines, in April and May 1993 was studied. The diets of tiger-tooth croaker (Otolithes ruber), commerson's anchovy (Stolephorus commersonii); and the Indian anchovy (Stolephorus indicus) consisted mainly of zooplankton, primarily crustaceans. The stomach content of orangefin ponyfish (Leiognathus bindus) was found to consist mostly of detritus and unidentified materials. Daily rations estimated were: 1.90 g day super(1) for O. ruber of 17.3 g mean body weight (BW), 0.078 g day super(1) for S. commersonii) of 3.8 g mean BW, 0.062 g day super(1) for S. indicus of 3.9 g mean BW and 0.56 g day super(1) for L. bindus of 7.7 g mean BW.
    Keywords: Fisheries ; Feeding behaviour ; Food composition ; Diets ; Food consumption ; Stomach content ; Marine fish ; Fishery biology ; Trawling ; San Miguel Bay ; Philippines ; Otolithes ruber ; Leiognathus bindus ; Stolephorus commersonii ; Stolephorus indicus
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
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    Format: 35-40
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  • 9
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    In:  http://aquaticcommons.org/id/eprint/9195 | 115 | 2012-11-28 13:47:03 | 9195 | WorldFish Center
    Publication Date: 2021-07-03
    Description: The widespread and long-term nature of the tsunami damage in Aceh province, Indonesia has threatened the continued use of coastal and fisheries resources. This article describes the application of the Rapid Appraisal of Fisheries Management System (RAFMS) methodology and presents key findings from the participatory appraisals in 15 study sites. The focus is on changes in the number and types of fishing boats and fishing effort, consumption and marketing flow patterns and community perspectives on livelihood options. The level of aid (for new boats), mainly from international organizations, has been unevenly distributed with the number of boats in 13 of 15 villages still being well below the pre-tsunami levels. A focus on supplying small vessels may put increased fishing pressure on the near-shore zone. Consumption data and marketing flows suggest that most fishing villages are supplying outside markets and adding considerably to the wider food security of the province. Despite the tsunami, marine fisheries-related livelihoods are still preferred, although there are indications for the potential expansion of livelihoods into the culture of new species. Alternative resource-based livelihoods need to be tested and refined to fit the needs of the current conditions in Aceh to provide viable options for eliminating hunger and reducing poverty.
    Keywords: Fisheries ; Disaster ; Tsunami
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 19-30
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  • 10
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    In:  http://aquaticcommons.org/id/eprint/9196 | 115 | 2012-11-28 13:45:25 | 9196 | WorldFish Center
    Publication Date: 2021-07-03
    Keywords: Fisheries ; Coral reefs ; Resource management ; Thailand
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 40-42
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