The importance of identifying spatial population structure in restocking and stock enhancement programmes

Ward, Robert

doi:10.1016/j.fishres.2006.03.009

Cited by 135 publications

(117 citation statements)

References 98 publications

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“…In relation to these potential genetic effects, genetic characteristics of the natural populations should be considered before any stock restoration and stock enhancement initiative (Blankenship and Leber 1995). As a precautionary measure, it is recommended that a large number of broodstock should be taken directly from the population to be enhanced and in cases where broodstock are no longer available from the area to be enhanced, the most genetically-similar populations should be used (Ward 2006). However, this would only be tenable if baseline population genetic information is available.…”

Section: Spatial Planning and Restorationmentioning

confidence: 99%

The application of genetics to marine management and conservation: examples from the Indo-Pacific

Heyden¹,

Beger²,

Toonen³

et al. 2014

BMS

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ABSTRACT.-Molecular tools and analyses have played pivotal roles in uncovering the processes and patterns of biodiversity in the Indian and Pacific oceans. However, integrating genetic results into management and conservation objectives has been challenging, with few examples that show practical applicability. This review aims to address some of the perceived barriers to an enhanced approach that integrates molecular data into management and conservation goals, by reviewing papers relevant to both conservation and fisheries management in the Indo-Pacific region, particularly with respect to phylogeography, connectivity, and species identification, as well as stock delineation, restoration of depleted wild stocks, mislabeled marine resources and "molecular forensics." We also highlight case studies from each of these areas that illustrate how molecular analyses are relevant to conservation and management in the IndoPacific, spanning a variety of vertebrate and invertebrate species. We discuss the application of genetic data to the design and evaluation of the effectiveness of marine protected area networks, stock delineation, and restoration and the usage of exclusion tests and parentage analyses for fisheries management. We conclude that there is a distinct need for increasing public awareness and ownership of genetically unique lineages and, ultimately, the increased inclusion of genetic research into management policy and conservation. Finally, we make a case for the importance of clear and effective communication for promoting public awareness, public ownership, and for achieving conservation goals within the region.

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Section: Spatial Planning and Restorationmentioning

confidence: 99%

The application of genetics to marine management and conservation: examples from the Indo-Pacific

Heyden¹,

Beger²,

Toonen³

et al. 2014

BMS

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“…Since an array of management actions are urgently needed to either avoid collapse or stimulate restoration of vulnerable species, stock assessments of these species are now more important than ever before. Not only is it fundamental to the preservation of genetic diversity (Kenchington et al 2003) but it also has important implications for broodstock collection and breeding programs within associated stock enhancement efforts (Ward 2006). The exploitation and decline of wild abalone stocks in particular is a world-wide phenomenon (Karpov et al 2000) and several species have been recognized as vulnerable or endangered.…”

Section: Introductionmentioning

confidence: 99%

Historical isolation and hydrodynamically constrained gene flow in declining populations of the South-African abalone, Haliotis midae

et al. 2010

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Over the past two decades, the South African abalone (Haliotis midae), has been under serious threat mainly due to overexploitation. To assure successful management and conservation of wild stocks, the consideration of species-specific evolutionary and population dynamic aspects is critical. In this study, eight microsatellites and 12 single nucleotide polymorphic loci (SNPs) were applied to determine genetic structure in nine populations sampled throughout the species' natural distribution range. It spans along three biogeographical regions of the South African coastline: temperate in the West coast, warm temperate in the South coast and subtropical in the East coast. Data analysis applying frequentist and Bayesian-based clustering methods indicated weak genetic differentiation between populations of the West, South and East coast. Spatial Bayesian inference further revealed clinal variation along a longitudinal gradient and a transitional zone in the South coast. Coalescent analysis of long-term migration showed restricted interchange among the sampling locations of the South coast while estimates of effective population size were comparable between coastal regions. Furthermore demographic analysis of microsatellite data suggested population expansion, probably reflecting range expansion that occurred following glacial retreat during the Pleistocene. Overall, population structure analysis suggested contemporary (hydrographical conditions) as well as historical (Pleistocene contraction of habitat) restrictions to gene flow. This study provides the foundation for the establishment of an integrated management policy for preserving the natural diversity and adaptive potential of H. midae.

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“…Freshwater fish are expected to have high levels of genetic differentiation due to the natural fragmentation of the rivers and lakes (Ward, 2006). However, intentional introductions for fishing, aquaculture and to repopulate freshwater systems, in mitigation of population reductions, may homogenize populations (McBride et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…Information about the current state of its population structure would allow us to determine if its movement by humans may have influenced its population genetic structure (Wong et al, 2004;Ward, 2006). Thus the goal of this study was to determine the population genetic structure of the Argentine silverside in four important areas used for recreational, commercial and repopulation purposes (Chascomús Lake, Chasicó Lake, Cabra Corral Reservoir and Río de la Plata).…”

Section: Introductionmentioning

confidence: 99%

Genetic population structure and evidence of genetic homogeneity in populations of the Argentinian silverside Odontesthes bonariensis (Teleostei: Atherinopsidae) inhabiting central and northwestern Argentina

Valencia

Véliz

Tombari

et al. 2017

lajar

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ABSTRACT. The study of species in their native geographic ranges is key to understanding how human activity has influenced spatial fragmentation or species homogenization. The Argentinian silverside Odontesthes bonariensis, of interest for aquiculture and sport fishing, is a relevant subject of study. The species has been introduced in a number of countries and re-introduced in some areas of Argentina with unknown effects. The objectives of this study were to determine the population structure, genetic diversity (GD) and effective population sizes (Ne) of O. bonariensis in Argentina. Six microsatellite loci were amplified in individuals collected from four water bodies affected by commercial and sport fishing: Cabra Corral Reservoir (CC), Chascomús Lake (CH), Chasicó Lake (LCH) and the Río de la Plata (RLP). Three genetic groups were detected: one in CC, one in RLP and the last inhabiting CH and LCH. Interestingly, CH and LCH are located 768 km apart, but showed no difference in allele frequencies; suggesting the introduction of individuals from CH into LCH. The largest allele richness, GD and Ne were found in RLP indicating that the largest population of O. bonariensis may be found in this area. Current Ne were lower than historical Ne in all areas, suggesting a change in the GD over time. This study provides information on the genetic structure and genetic diversity of O. bonariensis across its native distribution and over time, demonstrating the first evidence of a possible genetic homogenization in this species probably linked to human activities.

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The importance of identifying spatial population structure in restocking and stock enhancement programmes

Cited by 135 publications

References 98 publications

The application of genetics to marine management and conservation: examples from the Indo-Pacific

The application of genetics to marine management and conservation: examples from the Indo-Pacific

Historical isolation and hydrodynamically constrained gene flow in declining populations of the South-African abalone, Haliotis midae

Genetic population structure and evidence of genetic homogeneity in populations of the Argentinian silverside Odontesthes bonariensis (Teleostei: Atherinopsidae) inhabiting central and northwestern Argentina

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