Novel foraging strategies observed in a growing leopard seal (Hydrurga leptonyx) population at Livingston Island, Antarctic Peninsula

The leopard seal (Hydrurga leptonyx) is a genetically low-studied species. In order to conduct the first genetic diversity assessment of this species in Danco Coast (Antarctic Peninsula), 423 bp of the mitochondrial DNA Control Region (mtDNA-CR) was sequenced from 13 blood samples collected in Primavera Base (62º15’S, 58º39’W) during the 2011-2012 austral summer. Our results showed high haplotype diversity (h = 0.99), with various divergent haplotypes. Our findings suggest that leopard seals in the Danco Coast could represent different phylogroups; however, including more genetic markers are needed to confirm this hypothesis.

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Health Assessment of the Leopard Seal, Hydrurga leptonyx, in Prydz Bay, Eastern Antarctica and NSW, Australia

Health of Antarctic Wildlife ◽

10.1007/978-3-540-93923-8_10 ◽

2009 ◽

pp. 167-192 ◽

Cited By ~ 3

Author(s):

R. B. Gray ◽

T. L. Rogers ◽

P. J. Canfield

Keyword(s):

Health Assessment ◽

Prydz Bay ◽

Leopard Seal ◽

Hydrurga Leptonyx

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Detecting Recent Changes of Ice-Free Extensions on Livingston Island, Northern Antarctic Peninsula Region Using Landsat Data

10.1109/igarss47720.2021.9553410 ◽

2021 ◽

Author(s):

Ana Nieto ◽

Thomas Schmid ◽

Jeronimo Lopez-Martinez

Keyword(s):

Antarctic Peninsula ◽

Landsat Data ◽

Livingston Island

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New trigonioid bivalves from the Early Jurassic to earliest Cretaceous of the Antarctic Peninsula region: systematics and austral paleobiogeography

Journal of Paleontology ◽

10.1017/s0022336000026925 ◽

1995 ◽

Vol 69 (1) ◽

pp. 66-84 ◽

Cited By ~ 8

Author(s):

Simon R. A. Kelly

Keyword(s):

New Zealand ◽

Antarctic Peninsula ◽

Southern Africa ◽

Late Jurassic ◽

Early Jurassic ◽

South Shetland Islands ◽

Shetland Islands ◽

Livingston Island ◽

History Of ◽

The Antarctic

New discoveries of trigonioid bivalves are documented from three areas in the Antartic Peninsula: the Fossil Bluff Group of Alexander Island, the Latady Formation of the Orville Coast, and the Byers Group of Livingston Island, South Shetland Islands. Eleven taxa are described, representing six genera or subgenera. The faunas are characterized by genera including Vaugonia (Vaugonia), the first Early Jurassic trigonioid recognized on the continent; Vaugonia (V.) and V. (Orthotrigonia?) in the Late Jurassic; and Iotrigonia (Iotrigonia), Myophorella (Scaphogonia), and Pterotrigonia (Pterotrigonia), which span the Jurassic–Cretaceous boundary, reaching the Berriasian stage. The following species are new: Pterotrigonia (P.) cramei n. sp., Pterotrigonia (P.) thomsoni n. sp., Vaugonia (V.) orvillensis n. sp., and V. (Orthotrigonia?) quiltyi n. sp. The faunas show affinities with those of New Zealand and southern Africa. Trigonioids characterize the shallower marine biofacies in the Jurassic of the Antarctic and reflect the principal shallowing events in the history of the region.

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Variations in ice rafted detritus on beaches in the South Shetland Islands: a possible climate proxy

Antarctic Science ◽

10.1017/s0954102004002147 ◽

2004 ◽

Vol 16 (3) ◽

pp. 339-344 ◽

Cited By ~ 22

Author(s):

BRENDA L. HALL ◽

ETHAN R. PERRY

Keyword(s):

Antarctic Peninsula ◽

Ocean Circulation ◽

Late Holocene ◽

Warming Trend ◽

South Shetland Islands ◽

The South ◽

Shetland Islands ◽

Livingston Island ◽

The Antarctic ◽

Glacial Advance

Raised beach ridges on Livingston Island of the South Shetland Islands display variations in both quantity and source of ice rafted detritus (IRD) received over time. Whereas the modern beach exhibits little IRD, all of which is of local origin, the next highest beach (∼250 14C yr BP) has large amounts, some of which comes from as far away as the Antarctic Peninsula. Significant quantities of IRD also were deposited ∼1750 14C yr BP. Both time periods coincide with generally cooler regional conditions and, at least in the case of the ∼250 yr old beach, local glacial advance. We suggest that the increases in ice rafting may reflect periods of greater glacial activity, altered ocean circulation, and/or greater iceberg preservation during the late Holocene. Limited IRD and lack of far-travelled erratics on the modern beach are both consistent with the ongoing warming trend in the Antarctic Peninsula region.

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Cretaceous angiosperms from an allegedly Triassic flora at Williams Point, Livingston Island, South Shetland Islands

Antarctic Science ◽

10.1017/s0954102089000362 ◽

1989 ◽

Vol 1 (3) ◽

pp. 239-248 ◽

Cited By ~ 28

Author(s):

P.M. Rees ◽

J.L. Smellie

Keyword(s):

Antarctic Peninsula ◽

Direct Evidence ◽

South Shetland Islands ◽

Fossil Flora ◽

Volcanic Arc ◽

Shetland Islands ◽

Active Volcanism ◽

Livingston Island ◽

Radiometric Ages ◽

The Antarctic

A terrestrial sequence on Livingston Island, South Shetland Islands, known as the Williams Point Beds contains a well-preserved, diverse fossil flora previously assigned a Triassic age. Because of their supposed age, volcanic provenance and evidence for active volcanism, the Williams Point Beds have occupied a unique position in Gondwana (pre-Jurassic) stratigraphy in the Antarctic Peninsula region. However, a large new collection of plant specimens obtained at Williams Point has yielded several species of angiosperm leaves, which are abundant and occur at all levels within the Williams Point Beds sequence. Thus, a Triassic age is no longer tenable. On the basis of the plants present and published radiometric ages for associated strata, the Williams Point Beds fossil flora is reassigned to the Cretaceous, and there is some evidence for a more restricted Albian–Cenomanian age. This revision of the age of the Williams Point Beds removes all direct evidence for an active Triassic volcanic arc in the Antarctic Peninsula region.

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