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Assessing the recovery of an Antarctic predator from historical exploitation

Published on Oct 16, 2019in Royal Society Open Science2.515
· DOI :10.1098/rsos.190368
Alexandre N. Zerbini22
Estimated H-index: 22
,
Grant Adams1
Estimated H-index: 1
(UW: University of Washington)
+ 3 AuthorsAndré E. Punt51
Estimated H-index: 51
(UW: University of Washington)
Abstract
The recovery of whale populations from centuries of exploitation will have important management and ecological implications due to greater exposure to anthropogenic activities and increasing prey c...
  • References (55)
  • Citations (2)
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References55
Newest
#1Michael J. Noad (UQ: University of Queensland)H-Index: 20
#2Eric Kniest (University of Newcastle)H-Index: 7
Last. Rebecca A. Dunlop (UQ: University of Queensland)H-Index: 13
view all 3 authors...
Despite heavy overexploitation and near extirpation, some populations of large whales are recovering. Monitoring their recovery has important implications for conservation, management and our understanding of population dynamics and recovery in large mammals. The eastern Australian population of humpback whales was hunted to near-extirpation by the early 1960s. Despite this, the population started to recover, and structured surveys were initiated in the 1980s. These surveys comprise one of the l...
1 CitationsSource
#1Angus Atkinson (PML: Plymouth Marine Laboratory)H-Index: 44
#2Simeon L. Hill (BAS: British Antarctic Survey)H-Index: 20
Last. Sevrine F. Sailley (PML: Plymouth Marine Laboratory)H-Index: 12
view all 11 authors...
High-latitude ecosystems are among the fastest warming on the planet1. Polar species may be sensitive to warming and ice loss, but data are scarce and evidence is conflicting2–4. Here, we show that, within their main population centre in the southwest Atlantic sector, the distribution of Euphausia superba (hereafter, ‘krill’) has contracted southward over the past 90 years. Near their northern limit, numerical densities have declined sharply and the population has become more concentrated toward...
18 CitationsSource
#1Douglas Kinzey (NMFS: National Marine Fisheries Service)H-Index: 2
#2George M. Watters (NMFS: National Marine Fisheries Service)H-Index: 18
Last. Christian S. Reiss (NMFS: National Marine Fisheries Service)H-Index: 22
view all 3 authors...
An integrated model assessing the status and productivity of Antarctic krill (Euphausia superba, hereafter krill) was configured to estimate different subsets of 118 potentially estimable parameters in alternative configurations. We fixed the parameters that were not estimated in any given configuration at pre-specified values. The model was fitted to over forty years of fisheries and survey data for krill in Subarea 48.1, a statistical reporting area around the Antarctic Peninsula used by the C...
2 CitationsSource
#1Phil N. Trathan (BAS: British Antarctic Survey)H-Index: 22
#2Victoria Warwick-Evans (BAS: British Antarctic Survey)H-Index: 2
Last. Mercedes Santos (Instituto Antártico Argentino)H-Index: 6
view all 14 authors...
9 CitationsSource
#1Logan J. Pallin (OSU: Oregon State University)H-Index: 3
#2C. Scott Baker (OSU: Oregon State University)H-Index: 25
Last. Ari S. Friedlaender (OSU: Oregon State University)H-Index: 26
view all 9 authors...
Antarctic humpback whales are recovering from near extirpation from commercial whaling. To understand the dynamics of this recovery and establish a baseline to monitor impacts of a rapidly changing...
13 CitationsSource
GA Bortolotto PhD is funded by the Brazilian National Council for Scientific and Technological Development (Conselho Nacional de Desenvolvimento Cientifico e Tecnologico, CNPq; Science Without Borders, scholarship #208203/2014 - 1). Cetacean International Society granted GA Bortolotto with small grants which contributed to the development of this study.
7 CitationsSource
#1Heloise J. Pavanato (University of Rio Grande)H-Index: 1
#2Leonardo L. WedekinH-Index: 13
Last. Paul G. Kinas (University of Rio Grande)H-Index: 1
view all 5 authors...
Abstract We developed a Bayesian distance sampling analysis using a hierarchically structured model parameterization to estimate humpback whale abundance in the Southwest Atlantic Ocean (Breeding Stock A). We included covariates that affect detection (altitude and sighting cue) and occurrence probability (year and distance from shore). Population sizes for 2008, 2011 and 2015 were estimated to be 7,689 (P.I.95% = 6,585–8,931), 8652 (P.I.95% = 7,696–9,682), and 12,123 (P.I.95% = 10,811–13,531), r...
6 CitationsSource
7 CitationsSource
#1Howard C. RosenbaumH-Index: 21
#2Francine KershawH-Index: 4
Last. C. Scott BakerH-Index: 25
view all 22 authors...
7 CitationsSource
#1Ana Lúcia Cypriano-Souza (PUCRS: Pontifícia Universidade Católica do Rio Grande do Sul)H-Index: 4
#2Márcia H. EngelH-Index: 14
Last. Sandro L. Bonatto (PUCRS: Pontifícia Universidade Católica do Rio Grande do Sul)H-Index: 35
view all 12 authors...
Humpback whales wintering in tropical waters along the Atlantic and Pacific coasts of the South American continent are thought to represent distinct populations or “stocks.” Here we present the first analysis of genetic differentiation and estimates of gene flow between these breeding stocks, based on both mitochondrial DNA (mtDNA) control region sequences (465 bp) and 16 microsatellite loci from samples collected off Brazil (n = 277) and Colombia (n = 148), as well as feeding areas near the wes...
6 CitationsSource
Cited By2
Newest
#1Nathali G. Ristau (UFMA: Federal University of Maranhão)
Last. Izeni Pires Farias (UFAM: Federal University of Amazonas)H-Index: 27
view all 7 authors...
Abstract Humpback whales have a cosmopolitan distribution and undertake annual migrations between low and high latitudes where breeding and feeding takes place, respectively. In Brazil, the main breeding area encompasses the Abrolhos Bank at the Eastern Brazilian Coast and the feeding area of this population is located in Georgia and South Sandwich Islands. Here, two recent records of humpback whales are reported to Maranhao state, Amazonian Equatorial Coast (AEC), one of which involves a newbor...
Source
#1Jonathan M. Handley (BirdLife International)H-Index: 4
#1Jonathan M. Handley (BirdLife International)
Last. Jonathan Hall (RSPB: Royal Society for the Protection of Birds)
view all 18 authors...
Funding: This research was funded by the Pew Bertarelli Ocean Legacy Project of the Pew Charitable Trusts and Bertarelli Foundation.
Source
#1George M. Watters (NOAA: National Oceanic and Atmospheric Administration)H-Index: 18
#2Jefferson T. Hinke (NOAA: National Oceanic and Atmospheric Administration)H-Index: 14
Last. Christian S. Reiss (NOAA: National Oceanic and Atmospheric Administration)H-Index: 22
view all 3 authors...
Low catch limits for forage species are often considered to be precautionary measures that can help conserve marine predators. Difficulties measuring the impacts of fisheries removals on dependent predators maintain this perspective, but consideration of the spatio-temporal scales over which forage species, their predators, and fisheries interact can aid assessment of whether low catch limits are as precautionary as presumed. Antarctic krill are targeted by the largest fishery in the Southern Oc...
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