Sex-biased dispersal of great white sharks

Pardini, Amanda T.; Jones, Catherine S.; Noble, Leslie R.; Kreiser, Brian R.; Malcolm, Hamish A.; Bruce, Barry D.; Stevens, John D.; Cliff, Geremy; Scholl, Michael C.; Francis, Malcolm P.; Duffy, Clinton; Martin, Andrew P.

doi:10.1038/35084125

Cited by 263 publications

(265 citation statements)

References 10 publications

(3 reference statements)

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“…This result has implications for a white shark population unique to North American shores. To examine if site fidelity observed from electronic tagging was associated with a genetically discrete population, we compared mitochondrial control region sequences (1109 base pairs) from biopsies of 47 tagged and 12 untagged (electronic supplementary material, tables S1 and S2) NEP white sharks sampled in California to published sequences (GenBank) from SA and ANZ (Pardini et al 2001). Strong clustering of these NEP sharks with those from ANZ was evident (figure 4), yet NEP sharks formed a unique monophyletic clade (bootstrap ¼ 58%, Bayesian posterior probability ¼ 60%) of relatively recently derived lineages.…”

Section: Resultsmentioning

confidence: 99%

“…Mitochondrial control region sequences were obtained from the polymerase chain reaction using primers (ProL2 and PHeCacaH2) and conditions described in Pardini et al (2001). Control region fragments were sequenced by Geneway Research, LLC (Hayward, CA, USA) and aligned using Clustal W option in Bioedit (Hall 1999).…”

Section: Methodsmentioning

confidence: 99%

“…White sharks have a circumglobal distribution with primary concentrations in South Africa (SA) (Pardini et al 2001;Bonfil et al 2005), Australia/New Zealand (ANZ) (Pardini et al 2001;Bruce et al 2006) and the northeastern Pacific (NEP) (Boustany et al 2002;Weng et al 2007;Domeier & Nasby-Lucas 2008). Precipitous declines in C. carcharias observations have been reported in the north Atlantic (Baum et al 2003) and in the Mediterranean (Compagno 1984;Cavanagh & Gibson 2007).…”

Section: Introductionmentioning

confidence: 99%

“…Precipitous declines in C. carcharias observations have been reported in the north Atlantic (Baum et al 2003) and in the Mediterranean (Compagno 1984;Cavanagh & Gibson 2007). To date, two white shark clades have been identified globally; mitochondrial DNA (mtDNA) analyses indicate SA and ANZ form genetically distinct populations (Pardini et al 2001). Tagging and genetics studies have led researchers to hypothesize that some spatial overlap occurs among these distant populations via trans-oceanic migrations by both sexes (Pardini et al 2001;Bonfil et al 2005).…”

Section: Introductionmentioning

confidence: 99%

“…To date, two white shark clades have been identified globally; mitochondrial DNA (mtDNA) analyses indicate SA and ANZ form genetically distinct populations (Pardini et al 2001). Tagging and genetics studies have led researchers to hypothesize that some spatial overlap occurs among these distant populations via trans-oceanic migrations by both sexes (Pardini et al 2001;Bonfil et al 2005). In the NEP, data from satellite pop-up achival transmitting (PAT) tags have demonstrated that white sharks tagged in California (Boustany et al 2002;Weng et al 2007) and at Guadalupe Island off northern Mexico (Domeier & Nasby-Lucas 2008) share common oceanic habitats.…”

Section: Introductionmentioning

confidence: 99%

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Philopatry and migration of Pacific white sharks

et al. 2009

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Advances in electronic tagging and genetic research are making it possible to discern population structure for pelagic marine predators once thought to be panmictic. However, reconciling migration patterns and gene flow to define the resolution of discrete population management units remains a major challenge, and a vital conservation priority for threatened species such as oceanic sharks. Many such species have been flagged for international protection, yet effective population assessments and management actions are hindered by lack of knowledge about the geographical extent and size of distinct populations. Combining satellite tagging, passive acoustic monitoring and genetics, we reveal how eastern Pacific white sharks ( Carcharodon carcharias ) adhere to a highly predictable migratory cycle. Individuals persistently return to the same network of coastal hotspots following distant oceanic migrations and comprise a population genetically distinct from previously identified phylogenetic clades. We hypothesize that this strong homing behaviour has maintained the separation of a northeastern Pacific population following a historical introduction from Australia/New Zealand migrants during the Late Pleistocene. Concordance between contemporary movement and genetic divergence based on mitochondrial DNA demonstrates a demographically independent management unit not previously recognized. This population's fidelity to discrete and predictable locations offers clear population assessment, monitoring and management options.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Philopatry and migration of Pacific white sharks

et al. 2009

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Case Study: White Shark Movements in the North Pacific Pelagic Ecosystem

Boustany

Weng

Anderson

et al. 2008

Sharks of the Open Ocean

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Diversity and genetic population structure of the Brazilian sharpnose shark Rhizoprionodon lalandii

Mendonça

Oliveira

Gadig

et al. 2013

Aquatic Conservation

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1. Similar to many small, range-restricted elasmobranchs, the Brazilian sharpnose shark (Rhizoprionodon lalandii) is listed as 'data deficient' by the International Union for the Conservation of Nature (IUCN). Data on stock assessment and sustainability are scarce, and there is no information on population structure. This constitutes a management problem because this shark comprises approximately 50% of the catch of small coastal sharks in Brazil.2. In this study, populations of R. lalandii distributed from the Caribbean to southern Brazil were investigated using sequences from the mitochondrial DNA control region. Analysis of molecular variance revealed strong structuring between population samples from the Caribbean and those from the Brazilian coast (Ф ST = 0.254, P < 0.0001). Significant differences in the rates of genetic diversity between these major areas were also detected. The observed levels of population structuring are likely to be driven by female phylopatry.3. Therefore, the identification of both mating and nursery areas with parallel ban/restriction of fishing in these areas may be critical for the long-term sustainability of these populations.

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Sex-biased dispersal of great white sharks

Cited by 263 publications

References 10 publications

Philopatry and migration of Pacific white sharks

Philopatry and migration of Pacific white sharks

Case Study: White Shark Movements in the North Pacific Pelagic Ecosystem

Diversity and genetic population structure of the Brazilian sharpnose shark Rhizoprionodon lalandii

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