J. Ellis

Publications140
h-index36
Citations6,570
Highly Influential Citations423
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Climate Change and Distribution Shifts in Marine Fishes
We show that the distributions of both exploited and nonexploited North Sea fishes have responded markedly to recent increases in sea temperature, with nearly two-thirds of species shifting in mean…
Sharks, Skates, and Rays: the Biology of Elasmobranch Fishes
  • J. Ellis
  • Environmental Science
  • 30 March 2000
The Comparative Feeding Ecology of Six Species of Shark and Four Species of Ray (Elasmobranchii) In The North-East Atlantic
The stomach contents of ten species of elasmobranch from the north-eastern Atlantic indicate that most are generalist predators, eating a variety of polychaetes, molluscs, crustaceans and teleosts.…
Methods of assessing extinction risk in marine fishes.
TLDR
A two-tiered approach for defining and assessing extinction risk is suggested, where simple methods requiring a few easily estimated parameters are used to triage or rapidly assess large numbers of populations and species to identify potentially vulnerable populations or species.
The Distribution of Chondrichthyan Fishes Around the British Isles and Implications for Conservation
TLDR
Nursery areas of elasmobranchs are typically in shallower water than adult habitats and such patterns were evident for blonde Raja brachyura, thornback R. clavata, small-eyed R. microocellata, spotted ray R. montagui and juvenile cuckoo ray Leucoraja naevus.
Changes in the demersal fish assemblages of British coastal waters during the 20th century
TLDR
Catches of demersal fish from research vessel surveys in three areas around the British Isles from 1901 to 1907 were compared with survey catches in the same areas from 1989 to 1997, finding species diversity was the same in both periods, although the most abundant species in each period were not the same.
The reproductive biology of Scyliorhinus canicula in the Bristol Channel, U.K.
TLDR
Among 972 Scyliorhinus canicula, the overall sex ratio was 1:1·23 and recently hatched fish were born in an equal sex ratio and at a mean length of 100·5 mm and mean weight of 3·07 g.
Do climate and fishing influence size-based indicators of Celtic Sea fish community structure?
assessing the status of demersal elasmobranchs in uk waters: a review
TLDR
The analyses show that many large demersal elasmobranchs have been severely depleted in uk waters but that groundfish surveys still provide a good source of data for monitoring changes in status of the more abundant species.
Molecular markers reveal spatially segregated cryptic species in a critically endangered fish, the common skate (Dipturus batis)
TLDR
The discovery of hidden diversity within a large, critically endangered marine vertebrate demonstrates how marine biodiversity can be underestimated, even in such a relatively well-studied and heavily exploited region.
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