movement of blue shark, <i>prionace glauca</i>, in the north-east atlantic based on mark–recapture data

Queiroz, Nuno; Lima, Fernando P.; Maia, Anabela; Ribeiro, Pedro A.; Correia, José Manuel; Santos, António M.

doi:10.1017/s0025315405012154

Cited by 37 publications

(33 citation statements)

References 21 publications

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“…Nonetheless, juvenile/sub-adult blue sharks tagged by us exhibited broad-scale summer/autumn horizontal movements, with high-space use of different oceanographic regions, including shelf, slope and oceanic water. Movement patterns of tagged blue sharks off the south coast of Portugal were also wide-ranging, with juvenile sharks (<145 cm FL) displaying less site fidelity than indicated by previous mark-recapture studies (Stevens 1976, 1990, Queiroz et al 2005. These juveniles showed some preference for shallower waters on the continental shelf.…”

Section: Horizontal Movementsmentioning

confidence: 81%

Short-term movements and diving behaviour of satellite-tracked blue sharks Prionace glauca in the northeastern Atlantic Ocean

Queiroz¹,

Humphries²,

Noble³

et al. 2010

Mar. Ecol. Prog. Ser.

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Shifts in the movement, activity or behaviour of individual animals in relation to changing environmental landscapes play an important role in determining re-distribution patterns of populations. Such spatial dynamics are poorly understood for pelagic sharks despite the decline of many species due to overfishing. Satellite-linked archival transmitters were used to record the movements of blue sharks Prionace glauca for the first time in the northeast Atlantic. A total of 256 tracking days were recorded, with sharks covering an estimated minimum distance of 11 432 km. Generally, blue sharks displayed wide-ranging southward movements away from the tagging areas (English Channel, southern Portugal and the Azores Islands), with juvenile sharks displaying less site fidelity than previously suggested from other methods. Vertical movements ranged from the surface to a maximum depth of 696 m, and water temperatures varied from 10.6 to 24.6°C. Shifts in both thermal and depth-use patterns were detected, with tracked sharks displaying behavioural variability correlated with the environment, both within and between individuals. Patterns of behaviour in coastal areas were generally linked to the thermal structure of the water column; sharks displayed some preference for surface layers in thermally stratified waters, but displayed less regular behaviour in wellmixed or weakly stratified waters. In offshore locations, sharks usually adopted either a surfaceoriented or a depth-oriented diving pattern, often switching between both in response to probable changes in prey distribution or prey type when in deeper water. Fishing-induced mortality of tracked sharks was approximately 10% during the period of 13 to 70 d post-tagging. Our results indicate a variety of short and longer range movements of juvenile and sub-adult blue sharks with respect to time and environment in the northeast Atlantic, which suggests complex spatial dynamics and population structuring in this exploited species.

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Section: Horizontal Movementsmentioning

confidence: 81%

Short-term movements and diving behaviour of satellite-tracked blue sharks Prionace glauca in the northeastern Atlantic Ocean

Queiroz¹,

Humphries²,

Noble³

et al. 2010

Mar. Ecol. Prog. Ser.

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“…Perhaps the lack of differentiation for the deep-water and demersal species reflects current or recent gene flow among a connected series of populations on oceanic ridges or continental slopes. On the other hand, I. oxyrinchus (shortfin mako) and P. glauca (blue shark) are both known to be highly migratory (Clarke & Stevens 1974, Casey & Kohler 1992, Campana et al 2005, Queiroz et al 2005, and this probably accounts for their lack of appreciable spatial differentiation. Two of these 13 species (Heptranchias perlo, Halosauropsis macrochir) show some evidence of possible population differentiation, but small sample sizes made this statistically non-significant.…”

Section: Discussionmentioning

confidence: 99%

DNA barcoding of shared fish species from the North Atlantic and Australasia: minimal divergence for most taxa, but Zeus faber and Lepidopus caudatus each probably constitute two species

Ward

Costa²,

Holmes³

et al. 2008

Aquat. Biol.

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Fifteen fish species, totalling 149 specimens, were cytochrome c oxidase I sequencedbarcoded -from Northern (Atlantic and Mediterranean) and Southern (Australasian) Hemisphere waters. Thirteen species showed no significant evidence of spatial genetic differentiation for this gene, although small sample sizes reduced statistical power. For marine fish, barcodes collected in one part of a species range are likely to be useful as identifiers in all other parts of its range. Two species did show striking north-south differentiation, with F ST values of 0.84 and 0.96 (both p << 0.001). One of these, the silver scabbardfish Lepidopus caudatus, showed 2.75% genetic distance between northern and southern clades. The other, John dory Zeus faber, showed 7.44% differentiation between northern and southern clades. All specimens of these 2 species fell correctly into the northern or southern clade. We suggest that both taxa conceal a currently unrecognised, cryptic species, and recommend further taxonomic and genetic investigation.

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“…Tagging studies (mark/recapture) conducted for Rajidae species have indicated traveling distances on the order of hundreds of kilometers, (Templeman 1984;Walker et al 1997;Hunter et al 2005) as compared to traveling distances on the order of thousands of kilometers for many bony and cartilaginous fishes Queiroz et al 2005) supporting the hypothesis of regional population structure in A. radiata. A closer look within the Rajidae, however, reveals that A. radiata travels the farthest-between 1.4 and 3 times as far as R. clavata (Templeman 1984;Walker et al 1997).…”

Section: Population Differentiationmentioning

confidence: 94%

Population structure and historical demography of the thorny skate (Amblyraja radiata, Rajidae) in the North Atlantic

et al. 2006

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Population genetic structure of the thorny skate (Amblyraja radiata) was surveyed in >300 individuals sampled from Newfoundland, Iceland, Norway, the Kattegat and the central North Sea. A 290-bp fragment of the mt cytochrome-b gene was first screened by SSCP. Sequences of SSCP haplotypes revealed 34 haplotypes, 14 of which were unique to Iceland, 3 to Newfoundland, 1 to Norway and 3 to the Kattegat. The global F ST was weak but significant. Removal of the two Kattegat locations, which were the most differentiated, resulted in no significant genetic differentiation. Haplotype diversity was high and evenly distributed across the entire Atlantic (h = 0.8) with the exception of the North Sea (h = 0.48). Statistical parsimony revealed a star-like genealogy with a central widespread haplotype. A subsequent nested clade analysis led to the inference of contiguous expansion with evidence for long distance dispersal between Newfoundland and Iceland. Historical demographic analysis showed that thorny skates have undergone exponential population expansion that started between 1.1 million and 690,000 years ago; and that the Last Glacial Maximum apparently had little effect. These results strongly differ from those of a parallel study of the thornback ray (Raja clavata) in which clear structure and former refugial areas could be identified. Although both species have similar life history traits and overlapping ranges, the continental shelf edge apparently does not present a barrier to migration in A. radiata, as it does for R. clavata.

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movement of blue shark, prionace glauca, in the north-east atlantic based on mark–recapture data

Cited by 37 publications

References 21 publications

Short-term movements and diving behaviour of satellite-tracked blue sharks Prionace glauca in the northeastern Atlantic Ocean

Short-term movements and diving behaviour of satellite-tracked blue sharks Prionace glauca in the northeastern Atlantic Ocean

DNA barcoding of shared fish species from the North Atlantic and Australasia: minimal divergence for most taxa, but Zeus faber and Lepidopus caudatus each probably constitute two species

Population structure and historical demography of the thorny skate (Amblyraja radiata, Rajidae) in the North Atlantic

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