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Stock structure of exploited shark species in north-eastern Australia

机译：澳大利亚东北部已开发鲨鱼物种的种群结构

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The project has provided management and other stakeholders with information necessary to make informed decisions about the management of four of the key exploited shark species caught in the Queensland inshore net fishery and northern New South Wales line fishery. The project has determined that spatial management of milk sharks within Queensland, and scalloped hammerhead, common black tip and Australian black tip sharks within Queensland and New South Wales is appropriate. The project has determined that both black tip shark species are likely to require co-operative management arrangements between Queensland and New South Wales. For scalloped hammerheads separate stocks between the two jurisdictions were identified from the fisheriesdependent samples, however genetic exchange across borders is likely to be facilitated by movement of adult females and perhaps larger males to a lesser extent. This information will greatly assist compliance with the Commonwealth Environment Protection and Biodiversity Conservation Act (1999) for shark fisheries in north-eastern Australia by providing the necessary basis for robust assessment of the status of stocks of the study species, thereby helping to deliver their sustainable harvest. It also helps to achieve objectives of the Australian National Shark Plan. ududThe project provides the appropriate spatial framework for future monitoring and assessment of the study species. This is at a time when shark fisheries are receiving close attention from all sectors and when monitoring programs are being implemented, aimed at better assessment of stock status.ududThis project has provided the crucial information for developing an appropriate monitoring design as well as the necessary basis for making statements about stock status.ududThe project has addressed research priorities identified by the Queensland Fisheries Research Advisory Board, Great Barrier Reef Marine Park Authority and Queensland Fisheries. Previously management has assumed a single stock for each species on the east coast of Queensland, and management of shark fisheries in New South Wales (NSW) and Queensland has been independent of one another.ududThe project has been able to enhance and develop links between research, management and industry. Strong positive relationships with commercial fishers were crucial in the collection of samples throughout the study area and fisheries managers were part of the project team throughout the study period. During the project the study area was extended to include both Queensland and NSW waters, creating mutualistic and positive links between the States’ research and management agencies. Extension of project results included management representatives from NSW and Queensland, as well as the Northern Territory where similar shark fisheries operate and similar species are targeted. ududThe project was able to provide significant human capital development opportunities providing considerable value to the project outcomes. Use of vertebral microchemistry and life history characteristics as stock determination methods provided material for two PhD students based at James Cook University: Ron Schroeder, vertebral chemistry; and Alastair Harry, life history characteristic.ududThe project has developed novel research methods that have great capacity for future application, including:udud• Development of a simple and rapid genetic diagnostic tool (RT-HRM-PCR assay) for differentiating among the black tip shark species, for which no simple morphological identifier exists; andudud• Development of laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS) methods for analysing and interpreting microchemical composition of shark vertebrae.ududThe study has provided further confirmation of the effectiveness of using a holistic approach in stock structure studies and justifies investment into such studies.
机译：该项目为管理层和其他利益相关者提供了必要的信息，以便就有关昆士兰近海​​网捕捞和新南威尔士北部捕捞的四种主要捕捞鲨鱼物种的管理做出明智的决定。该项目已确定昆士兰州内的奶鲨，昆士兰州和新南威尔士州的扇形锤头，普通黑鳍鲨和澳大利亚黑鳍鲨的空间管理是适当的。该项目已经确定，两种黑尖鲨物种都可能需要在昆士兰州和新南威尔士州之间进行合作管理安排。对于扇贝形锤头，从与渔业有关的样本中确定了两个管辖区之间的独立种群，但是成年雌性和也许雄性较大的雄性的活动可能会促进跨界的遗传交换。该信息将为稳健评估研究物种种群状况提供必要的依据，从而有助于实现其可持续发展，从而大大有助于遵守澳大利亚东北部鲨鱼渔业的联邦环境保护和生物多样性保护法（1999）。收获。它还有助于实现澳大利亚国家鲨鱼计划的目标。 ud ud该项目为将来对研究物种的监测和评估提供了适当的空间框架。这是鲨鱼捕捞受到各部门密切关注并正在实施监测计划的时候，目的是更好地评估种群状况。 ud ud该项目为制定适当的监测设计和提供了关键信息。 ud ud该项目解决了昆士兰州渔业研究咨询委员会，大堡礁海洋公园管理局和昆士兰州渔业局确定的研究重点。以前，管理人员对昆士兰州东海岸的每个物种都假设有单一种群，而新南威尔士州（NSW）和昆士兰州的鲨鱼渔业管理彼此独立。 ud ud该项目能够增强和发展研究，管理和行业之间的联系。与商业渔民的牢固积极关系对于整个研究区域的样本收集至关重要，而渔业经理在整个研究期间都是项目团队的一部分。在该项目期间，研究区域扩展到了昆士兰州和新南威尔士州的水域，在各州的研究和管理机构之间建立了互惠互利的积极联系。项目成果的扩展包括来自新南威尔士州和昆士兰州以及经营类似鲨鱼捕捞活动和针对类似物种的北领地的管理代表。 ud ud该项目能够提供大量的人力资本发展机会，为项目成果提供可观的价值。利用椎骨微化学和生活史特征作为种群确定方法，为詹姆斯·库克大学的两名博士生提供了材料：罗恩·施罗德（Ron Schroeder），椎骨化学； ud ud该项目开发了新颖的研究方法，具有很大的未来应用能力，其中包括： ud ud•开发了一种简单而快速的遗传诊断工具（RT-HRM-PCR分析法）不存在简单形态学识别符的黑尖鲨物种之间的区别；和 ud ud•激光消融电感耦合等离子体质谱（LA-ICPMS）方法的开发，用于分析和解释鲨鱼椎骨的微化学成分。 ud ud该研究进一步证实了在库存中使用整体方法的有效性结构研究，并证明对此类研究进行投资。

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