• Publications
  • Influence
The jellyfish joyride: causes, consequences and management responses to a more gelatinous future.
Human-induced stresses of overfishing, eutrophication, climate change, translocation and habitat modification appear to be promoting jellyfish (pelagic cnidarian and ctenophore) blooms to theExpand
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A review of the adaptive significance and ecosystem consequences of zooplankton diel vertical migrations
  • G. Hays
  • Biology
  • Hydrobiologia
  • 1 August 2003
Diel vertical migration (DVM) by zooplankton is a universal feature in all the World's oceans, as well as being common in freshwater environments. The normal pattern involves movement from shallowExpand
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Climate change and marine plankton.
Understanding how climate change will affect the planet is a key issue worldwide. Questions concerning the pace and impacts of climate change are thus central to many ecological and biogeochemicalExpand
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Scaling laws of marine predator search behaviour
Many free-ranging predators have to make foraging decisions with little, if any, knowledge of present resource distribution and availability. The optimal search strategy they should use to maximizeExpand
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Environmental context explains Lévy and Brownian movement patterns of marine predators
An optimal search theory, the so-called Lévy-flight foraging hypothesis, predicts that predators should adopt search strategies known as Lévy flights where prey is sparse and distributedExpand
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The energy density of jellyfish: Estimates from bomb-calorimetry and proximate-composition
Abstract Two techniques are described to calculate energy densities for the bell, gonad and oral arm tissues of three scyphozoan jellyfish ( Cyanea capillata , Rhizostoma octopus and ChrysaoraExpand
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Estimating the number of green and loggerhead turtles nesting annually in the Mediterranean
Most species of marine turtle breed every two or more years and it is the norm for females to lay more than one clutch of eggs within a nesting season. Knowing the interval between breeding seasonsExpand
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Fidelity to foraging sites, consistency of migration routes and habitat modulation of home range by sea turtles
Aim Resources can shape patterns of habitat utilization. Recently a broad foraging dichotomy between oceanic and coastal sites has been revealed for loggerhead sea turtles (Caretta caretta). SinceExpand
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Variation in reproductive output of marine turtles
Most marine turtle species are non-annual breeders and show variation in both the number of eggs laid per clutch and the number of clutches laid in a season. Large levels of inter-annual variation inExpand
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Polyandry in a marine turtle: females make the best of a bad job.
  • P. Lee, G. Hays
  • Biology, Medicine
  • Proceedings of the National Academy of Sciences…
  • 27 April 2004
The female perspective on reproductive strategies remains one of the most active areas of debate in biology. Even though a single mating is often sufficient to satisfy the fertilization needs of mostExpand
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