Spatial patterns in activity of leopard seals Hydrurga leptonyx in relation to sea ice

  title={Spatial patterns in activity of leopard seals Hydrurga leptonyx in relation to sea ice},
  author={Jessica Meade and Michaela B. Ciaglia and David J. Slip and Javier Negrete and Mar{\'i}a Elba Isabel M{\'a}rquez and Jorge Augusto Mennucci and Tracey L. Rogers},
  journal={Marine Ecology Progress Series},
Summer diving and haul‐out behavior of leopard seals (Hydrurga leptonyx) near mesopredator breeding colonies at Livingston Island, Antarctic Peninsula
Visual observations and comparisons of diving activity between and within years suggest individual-based differences of foraging effort by time of day, and dive and video data indicate that in addition to at-surface hunting, benthic searching and facultative scavenging are important foraging strategies for leopard seals near coastal mesopredator breeding colonies. Expand
Calling underwater is a costly signal: size-related differences in the call rates of Antarctic leopard seals
  • T. Rogers
  • Biology, Medicine
  • Current zoology
  • 2017
For marine mammals that call underwater, the production of repetitive sequences advertises the breath-holding ability of the caller to the listeners, and this ability may be related to male stamina and endurance, thus representing an honest signal that could be widespread in other species. Expand
Insights into the Genetic Diversity of the leopard seal (Hydrurga leptonyx), inferred from mitochondrial DNA analysis, at Danco Coast, Antarctic Peninsula
The first assessment of genetic diversity of leopard seals in waters around Danco Coast in the Antarctic Peninsula is conducted, showing high diversity with some divergent haplotypes and suggesting that individuals sampled belong to one population. Expand
Summer circumpolar acoustic occurrence and call rates of Ross, Ommatophoca rossii, and leopard, Hydrurga leptonyx, seals in the Southern Ocean
This is the first study to examine the circumpolar acoustic occurrence of Ross and leopard seals in the Southern Ocean pack ice and finds both species were more vocally active during the day. Expand
Evaluating Antarctic marine protected area scenarios using a dynamic food web model
Abstract Marine protected areas, especially when they are or include no-take zones, can support conservation objectives by creating an area where marine organisms are protected from humanExpand
Leopard seal diets in a rapidly warming polar region vary by year, season, sex, and body size
The seasonal increase in leopard seal δ 15 N values, and thus fur seal in their diet, was predictably related to larger body size; it may also be forcing reductions to the largest Antarctic fur seal colony in the Antarctic Peninsula. Expand
Food caching by a marine apex predator, the leopard seal (Hydrurga leptonyx)
The foraging behaviors of apex predators can fundamentally alter ecosystems through cascading predator–prey interactions. Food caching is a widely studied, taxonomically diverse behavior that canExpand
Foraging behaviour of Weddell seals (Leptonychotes weddellii) in connection to oceanographic conditions in the southern Weddell Sea
The region of the Filchner Outflow System (FOS) in the southeastern Weddell Sea is characterized by intensive and complex interactions of different water masses. Dense Ice Shelf Water (ISW) emergingExpand
From Vagrant to Resident: occurrence, residency and births of leopard seals (Hydrurga leptonyx) in New Zealand waters
ABSTRACT In contrast to previous reports that leopard seals (Hydrurga leptonyx) are rare vagrants to New Zealand, we show that this species is a regular member of the marine fauna of this region. WeExpand
Leukocyte counts in three sympatric pack-ice seal species from the western Antarctic Peninsula
It is suggested that future research into the potential of the N/L index as a stress indicator, that incorporates additional stress parameters including cortisol concentrations, oxidative damage, as well as other measures of immune function, is warranted for the pack ice seals. Expand


A general and simple method for obtaining R2 from generalized linear mixed-effects models
Summary The use of both linear and generalized linear mixed-effects models (LMMs and GLMMs) has become popular not only in social and medical sciences, but also in biological sciences, especiallyExpand
Density Can Be Misleading for Low-Density Species: Benefits of Passive Acoustic Monitoring
Under special circumstances acoustics can offer enormous advantage over traditional techniques and open up monitoring to regions that are remote, difficult and expensive to work within, no longer restricting long-term community assessment to resource-wealthy communities. Expand
West Antarctic Peninsula: An Ice-Dependent Coastal Marine Ecosystem in Transition
The extent, duration, and seasonality of sea ice and glacial discharge strongly influence Antarctic marine ecosystems. Most organisms' life cycles in this region are attuned to ice seasonality. TheExpand
A review of data on abundance, trends in abundance, habitat utilisation and diet for Southern Ocean ice-breeding seals
The development of models of marine ecosystems in the Southern Ocean is becoming increasingly important as a means of understanding and managing impacts such as exploitation and climate change.Expand
Could you please phrase “home range” as a question?
The need for more question-driven and focused research and for clearly distinguishing the biological concept of an animal's home range from the statistical quantities one uses to investigate this concept are argued. Expand
Responses of Antarctic pack-ice seals to environmental change and increasing krill fishing
The compound effects of changing habitats, ecosystem interactions, and fishing practices have implications for the management of Antarctic krill and conservation of its predators. For AntarcticExpand
The fishery for Antarctic krill – recent developments
The fishery for Antarctic krill (Euphausia superba) is the largest by tonnage in the Southern Ocean and recent developments in harvesting technology and in products being derived from krill indicate renewed interest in exploiting this resource. Expand
Ecological niche modeling of sympatric krill predators around Marguerite Bay, Western Antarctic Peninsula
Adelie penguins (Pygoscelis adeliae), carabeater seals (Lobodon carcinophagus), humpback (Megaptera novaeangliae), and minke whales (Balaenoptera bonaernsis) are found in the waters surrounding theExpand
Exploitation of distant Antarctic waters and close neritic waters by short‐tailed shearwaters breeding in South Australia
This study demonstrates that a range of search strategies are employed when exploiting prey across ocean basins, and discusses the trade-offs between different search strategies to identify the value of these contrasting behaviours to wide-ranging seabirds. Expand
Sightings of 114 leopard seals, Hydrurga leptonyx , have been recorded along the Chilean coasts from 1944 to 2010. Mostly immature seals occurred in northern and central Chile (18°30´S-39°59´S),Expand