A comparative study of the cephalopod prey of Patagonian toothfish (Dissostichus eleginoides) and southern elephant seals (Mirounga leonina) near Macquarie Island

@article{Hoff2004ACS,
  title={A comparative study of the cephalopod prey of Patagonian toothfish (Dissostichus eleginoides) and southern elephant seals (Mirounga leonina) near Macquarie Island},
  author={John van den Hoff},
  journal={Polar Biology},
  year={2004},
  volume={27},
  pages={604-612}
}
  • J. V. D. Hoff
  • Published 28 May 2004
  • Environmental Science
  • Polar Biology
Within the Southern Ocean, Patagonian toothfish (Dissostichus eleginoides Smitt) and southern elephant seals (Mirounga leonina Linnaeus) forage mainly on fish and cephalopods. From what is known of their diets, the proportion of fish is greatest in toothfish diet. When foraging at-sea for squid, elephant seals and toothfish most often co-occur over continental shelves and submarine plateaux surrounding sub-Antarctic land masses within the Southern Ocean. I used traditional (non-molecular… 
The diet of toothfish species Dissostichus eleginoides and Dissostichus mawsoni with overlapping distributions.
TLDR
This study supports the view that bathyal Dissostichus are opportunistic carnivores and finds that D. mawsoni and D. eleginoides occupy a similar trophic niche and are likely to compete for prey in regions where both are distributed.
The feeding habits of the Southern elephant seal, Mirounga leonina, at Isla 25 de Mayo/King George Island, South Shetland Islands
TLDR
The analysis of stomach samples showed that cephalopods were the main prey followed by fish, and myctophids may be the dominant fish prey of elephant seals in areas close to the South Shetlands, they would be probably replaced by P. antarcticum as seals migrate towards higher latitudes.
A review of Southern Ocean squids using nets and beaks
This review presents an innovative approach to investigate the teuthofauna from the Southern Ocean by combining two complementary data sets, the literature on cephalopod taxonomy and biogeography,
Age-related shifts in the diet composition of southern elephant seals expand overall foraging niche
TLDR
Age-related differences in both species composition and size of larger prey species that probably relate to ontogenetic changes in diving ability and haul-out behaviour and prey availability are found.
Foraging behaviour of southern elephant seals over the Kerguelen Plateau
A total of 79 (37 juvenile male, 42 adult female) southern elephant seals Mirounga leonina from the Kerguelen Islands were tracked between 2004 and 2009. Area-restricted search patterns and dive
The role of juvenile foraging ecology and growth in the evolution of life history strategies for southern elephant seals
TLDR
This study has followed juvenile seals as they grow and develop rapidly toward adulthood observing changes in foraging areas or strategies and associated changes in prey availability, differences in the seasonal availability of prey, changes in morphology and physiology for growth, maintenance or provisioning toward adulthood.
Quantifying the trophic linkages of Antarctic marine predators
TLDR
It is found that the trophic niche of predators changes seasonally and secondly, that euphausiids are important to all three species at various stages of the austral winter period.
Spatially Explicit Estimates of Prey Consumption Reveal a New Krill Predator in the Southern Ocean
TLDR
Isotopic assessment and concurrent tracking of seals are successfully used here to identify ontogenetic shifts in broad-scale foraging habitat use and diet preferences in a highly migratory predator.
Looking at the unseen: combining animal bio-logging and stable isotopes to reveal a shift in the ecological niche of a deep diving predator
TLDR
The inter-annual combination of bio-logging and stable isotopes could provide a powerful tool to investigate possible shifts in ecological niche between years according to environmental changes.
...
...

References

SHOWING 1-10 OF 67 REFERENCES
The diet of southern elephant seals (Mirounga leonina) from Heard Island
TLDR
Stomach contents were lavaged from 76 southern elephant seals at Heard Island between July 1992 and March 1993 and the diet of adults differed from that of juveniles, particularly pups in their first year.
Trophic interactions between the Patagonian toothfish, its fishery, and seals and seabirds around Macquarie Island
TLDR
Weak trophic linkages between the toothfish, its fishery, and seabirds and seals around Macquarie Island indicate little predation on toothfish by seals or seab birds, or prey competition between toothfish and other marine predators.
Diet of Patagonian toothfish (Dissostichus eleginoides) around Macquarie Island, South Pacific Ocean
TLDR
Significant inter-seasonal and inter-fishing-ground differences in diet were found, but dietary composition was not related to fishing depth, fish size or the time of day of capture.
Spawning cycle of onychoteuthid squids in the southern Indian Ocean:new information from seabird predators
TLDR
The present study indicates that mating/spawning of K. longimana and M. ingens occurs in Crozet waters during the winter months, and extends the biogeography of these birds to north of the Antarctic Polar Front, in the Polar Frontal Zone, where it has not previously been recorded.
Dietary evidence for spatial foraging segregation in sympatric albatrosses (Diomedea spp.) rearing chicks at Iles Nuageuses, Kerguelen
TLDR
Comparison of overall prey biogeography together with the presence/absence of prey species indicators of water masses indicates segregation through different foraging areas among the three mollymawks.
Fish prey of southern elephant seals, Mirounga leonina, at King George Island
TLDR
It is suggested that while myctophids may be the dominant fish prey of elephant seals in areas close to King George Island, they are probably replaced by P. antarcticum as seals migrate towards higher latitudes where this fish is extremely abundant.
Complete trophic segregation between South Georgian and common diving petrels during breeding at Iles Kerguelen
TLDR
The stable-carbon and -nitrogen isotopic composi- tion of chick food and chick feathers differed between the 2 species, thus emphasising the segregation at sea during the breeding period when adult birds are central-place foragers.
Prey preference and niche overlap of ringed seals Phoca hispida and harp seals P. groenlandica in the Barents Sea
TLDR
Ringed seals Phoca hispida and harp seals P. groenlandica were collected for diet analysis along the ice edge in the Barents Sea to investigate possible niche overlap and it appears that the 2 seal species exploit different fractions of the same resource.
ASSESSING NORTHERN ELEPHANT SEAL FEEDING HABITS BY STOMACH LAVAGE
TLDR
Stomach lavaging was used to study the feeding habits of northern elephanr seals found on San hliguel Island, California, during the spring of 1984, and 12 of which have not been previously reported as prey of the northern elephant seal were identified.
...
...