Range expansion of the Humboldt squid was not caused by tuna fishing

Watters, George M.; Olson, Robert J.; Field, John C.; Essington, Timothy E.

doi:10.1073/pnas.0710369105

Cited by 16 publications

(9 citation statements)

References 3 publications

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“…Other factors, including long-term warming and overfishing of competing predators, have been discussed in conjunction with the Humboldt squid range expansion (Zeidberg & Robison 2007, Litz et al 2011. The overfishing hypothesis has been challenged (Vetter et al 2008, Watters et al 2008, but a detailed analysis of this important issue remains to be carried out. The correlation between squid abundance off California and temperature anomalies is not strong on a decadal scale (Stewart 2012), and the extreme thermal tolerance of Humboldt squid (Gilly et al 2006(Gilly et al , 2012 suggests that temperature per se is unlikely to drive range expansion directly.…”

Section: Decreased Pelagic Habitat: Shifting Boundaries and Compressionmentioning

confidence: 99%

Oceanographic and Biological Effects of Shoaling of the Oxygen Minimum Zone

Gilly

Beman

Litvin

et al. 2013

Annu. Rev. Mar. Sci.

287

251

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Long-term declines in oxygen concentrations are evident throughout much of the ocean interior and are particularly acute in midwater oxygen minimum zones (OMZs). These regions are defined by extremely low oxygen concentrations (<20-45 μmol kg(-1)), cover wide expanses of the ocean, and are associated with productive oceanic and coastal regions. OMZs have expanded over the past 50 years, and this expansion is predicted to continue as the climate warms worldwide. Shoaling of the upper boundaries of the OMZs accompanies OMZ expansion, and decreased oxygen at shallower depths can affect all marine organisms through multiple direct and indirect mechanisms. Effects include altered microbial processes that produce and consume key nutrients and gases, changes in predator-prey dynamics, and shifts in the abundance and accessibility of commercially fished species. Although many species will be negatively affected by these effects, others may expand their range or exploit new niches. OMZ shoaling is thus likely to have major and far-reaching consequences.

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Section: Decreased Pelagic Habitat: Shifting Boundaries and Compressionmentioning

confidence: 99%

Oceanographic and Biological Effects of Shoaling of the Oxygen Minimum Zone

Gilly

Beman

Litvin

et al. 2013

Annu. Rev. Mar. Sci.

287

251

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“…There has been recent debate as to whether pelagic systems are driven by top-down or bottom-up processes (Zeidberg and Robison 2007;Watters et al 2008). Zeidberg and Robison (2007) processes.…”

Section: Biomass (End / Start)mentioning

confidence: 99%

Ecological effects of longline fishing and climate change on the pelagic ecosystem off eastern Australia

Griffiths

Young

Lansdell

et al. 2010

Rev Fish Biol Fisheries

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“…We appreciate the concern expressed by Watters et al (1), indeed, we agree that overfishing of tuna is probably not the direct cause of this development-at least not overfishing alone. Our article discusses the prospect that multiple, interacting factors may have led to this change.…”

Section: Reply To Watters Et Al: Range Expansion Of the Humboldt Squidmentioning

confidence: 58%

“…Anent the letter's other points, we will address them in order. If, as Watters et al (1) suggest, Dosidicus' thermal tolerance and plastic life history alone were sufficient grounds for a range expansion that has lasted through multiple generations, it probably would have occurred long before 2002. Previous incursions lasted less than two years (the presumed maximum length of one life cycle) and did not reach into high latitudes.…”

Section: Reply To Watters Et Al: Range Expansion Of the Humboldt Squidmentioning

confidence: 99%