Article
Multidisciplinary Sciences
Sophia Volzke, Jaimie B. Cleeland, Mark A. Hindell, Stuart P. Corney, Simon J. Wotherspoon, Clive R. McMahon
Summary: Southern elephant seals, which are highly dimorphic and extremely polygynous, exhibit clear differences in survival rates between males and females of different ages. While overall juvenile survival rates were stable around 80-85% for both sexes, male survival rates were consistently 5-10% lower than females until the age of 8. At this point, male survival rapidly decreased to 50% while female survival rates remained constant at 80%. These differences may be attributed to varying energetic requirements between adult males and females and are less distinct during early juvenile development. Our findings suggest that sex-specific adult survival in this species is influenced by ecological interactions and evolutionary specialization associated with being a highly polygynous marine predator.
ROYAL SOCIETY OPEN SCIENCE
(2023)
Article
Ecology
Rassim Khelifa, Hayat Mahdjoub, Leithen K. M'Gonigle, Claire Kremen
Summary: The use of high-speed videos (HSV) improves resighting rates and survival rate estimations for dragonfly species, compared to conventional eye observations. Including HSV in studies increased resights and survival probability estimates, enhancing the credibility intervals for these demographic parameters in dragonfly species. This method shows potential for expanding research possibilities on traditionally difficult-to-monitor species, such as insects and birds.
ECOLOGY AND EVOLUTION
(2021)
Article
Ecology
Jarod P. Lyon, Tomas Bird, Zeb Tonkin, Scott Raymond, Joanne Sharley, Robin Hale
Summary: This study tracked changes in abundance and size structure of four native freshwater fish species in the Murray River over 19 years, finding that local recruitment and immigration play different roles in driving population changes for different species. Local recruitment was an important driver for Murray cod and trout cod, while immigration was more important for golden perch and silver perch.Increases in spring river discharge strongly influenced responses for certain species.
ECOLOGICAL APPLICATIONS
(2021)
Article
Biology
Wei Zhang, Simon J. J. Bonner, Rachel S. S. McCrea
Summary: Batch marking is a common and useful approach in capture-recapture studies when individual marks cannot be applied. However, fitting traditional models to batch marked data can be computationally challenging. This paper proposes a latent multinomial model and demonstrates its efficacy through simulation studies.
Article
Environmental Sciences
Marta Cruz-Flores, Roger Pradel, Joel Bried, Teresa Militao, Veronica C. Neves, Jacob Gonzalez-Solis, Raul Ramos
Summary: This study evaluates the survival of a tropical and migratory seabird, Bulwer's petrel, under climate change and finds that sea surface temperature has the greatest influence on its adult survival. The study also predicts stronger impacts of climate change on tropical populations than on subtropical and temperate ones.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Ecology
Matthew J. Silk, Robbie A. McDonald, Richard J. Delahay, Daniel Padfield, David J. Hodgson
Summary: Long-term capture-mark-recapture data can provide valuable information on individual movements and social structures in populations. The CMRnet package introduced in this study generates social and movement networks from spatially explicit capture-mark-recapture data, with important applications in wildlife management and conservation.
METHODS IN ECOLOGY AND EVOLUTION
(2021)
Article
Ecology
Wei Cai, Stephanie Yurchak, Diana J. Cole, Laura L. E. Cowen
Summary: Capture-recapture experiments estimate population parameters, but tag loss in some populations requires the use of the Jolly-Seber tag loss model. This model addresses parameter redundancy issues and incorporates group heterogeneity.
ECOLOGY AND EVOLUTION
(2021)
Article
Biodiversity Conservation
Clayton T. Lamb, Laura Smit, Garth Mowat, Bruce Mclellan, Michael Proctor
Summary: Historical persecution greatly reduced the range of grizzly bears in North America, but recent recovery efforts and changing societal perceptions have led to their population recovery and expansion. This study focused on grizzly bears in southeast British Columbia, Canada, where their populations coexist with human settlements. The research found that human-caused mortality is significantly underreported, with road and rail collisions being particularly low in reporting. Grizzly bear mortality in the Elk Valley is much higher compared to other regions in British Columbia. To create a self-sustaining population in the Elk Valley, targeted efforts are needed to reduce attractants on private property and minimize collisions with trains and vehicles.
CONSERVATION SCIENCE AND PRACTICE
(2023)
Article
Ecology
Typhaine Rousteau, Olivier Duriez, Roger Pradel, Francois Sarrazin, Thierry David, Sylvain Henriquet, Christian Tessier, Jean-Baptiste Mihoub
Summary: This study investigated the effects of age and origin on survival and movement of translocated vultures. The results showed that age and origin were important factors influencing the survival and movement of vultures. The study recommended releasing adult vultures first to increase the success of establishment at the release site.
Review
Fisheries
K. J. Lees, M. A. MacNeil, K. J. Hedges, N. E. Hussey
Summary: Traditional mark-recapture methods in fisheries may have challenges and biases, while acoustic telemetry mark-recapture methods can overcome these issues but are not commonly used in fisheries management. Studies have identified various types of acoustic telemetry mark-recapture designs, highlighting their benefits and providing planning considerations for wider application.
REVIEWS IN FISH BIOLOGY AND FISHERIES
(2021)
Article
Ecology
Remi Fay, Sandra Hamel, Martijn van de Pol, Jean-Michel Gaillard, Nigel G. Yoccoz, Paul Acker, Matthieu Authier, Benjamin Larue, Christie Le Coeur, Kaitlin R. Macdonald, Alex Nicol-Harper, Christophe Barbraud, Christophe Bonenfant, Dirk H. Van Vuren, Emmanuelle Cam, Karine Delord, Marlene Gamelon, Maria Moiron, Fanie Pelletier, Jay Rotella, Celine Teplitsky, Marcel E. Visser, Caitlin P. Wells, Nathaniel T. Wheelwright, Stephanie Jenouvrier, Bernt-Erik Saether
Summary: Temporal correlations among demographic parameters are common, with positive correlations more frequent than negative correlations. These correlations vary significantly among species and are not strongly associated with life history pace. Ignoring temporal correlations may lead to underestimation of extinction risks in most species.
Article
Ecology
Thomas V. Riecke, Daniel Gibson, James S. Sedinger, Michael Schaub
Summary: This paper explores the use of count distributions to estimate the observation process in capture-mark-recapture studies, and demonstrates its ability to accurately recover demographic and observation parameters.
ECOLOGY AND EVOLUTION
(2022)
Article
Ecology
Gabriel M. Barrile, Anna D. Chalfoun, Wendy A. Estes-Zumpf, Annika W. Walters
Summary: Global wildfire regimes are changing rapidly, with significant impacts on ecological and population dynamics. This study focuses on the responses of boreal toads to a specific wildfire event, where the growth, dispersal, survival, and recruitment of the toads were compared before and after the fire. The findings indicate increased growth and dispersal following the fire, while survival and recruitment remained stable.
Article
Multidisciplinary Sciences
Martin Dula, Michal Bojda, Delphine B. H. Chabanne, Peter Drengubiak, Luboslav Hrdy, Jarmila Krojerova-Prokesova, Jakub Kubala, Jiri Labuda, Leona Marcakova, Teresa Oliveira, Peter Smolko, Martin Vana, Miroslav Kutal
Summary: Camera-trapping and capture-recapture models were used to estimate lynx densities and evaluate demographic parameters at three different sites over five consecutive seasons. Fluctuating densities, high turnover rates, and moderate apparent survival rate were observed, indicating potential human-induced mortalities and population constraints in the Carpathian region. Long-term camera-trapping surveys are crucial for monitoring population trends and implementing effective conservation measures.
SCIENTIFIC REPORTS
(2021)
Review
Marine & Freshwater Biology
Lindsay Wickman, William Rayment, Elisabeth Slooten, Stephen M. Dawson
Summary: This study discusses robust estimation of mark rate and its uncertainty in cetacean populations, finding that hierarchical Bayesian modeling performs better than frequentist variance estimators. Researchers should aim to sample as many unique groups as possible for improved accuracy and precision.
MARINE MAMMAL SCIENCE
(2021)
Article
Multidisciplinary Sciences
Mark A. Hindell, Ryan R. Reisinger, Yan Ropert-Coudert, Luis A. Huckstadt, Philip N. Trathan, Horst Bornemann, Jean-Benoit Charrassin, Steven L. Chown, Daniel P. Costa, Bruno Danis, Mary-Anne Lea, David Thompson, Leigh G. Torres, Anton P. Van de Putte, Rachael Alderman, Virginia Andrews-Goff, Ben Arthur, Grant Ballard, John Bengtson, Marthan N. Bester, Arnoldus Schytte Blix, Lars Boehme, Charles-Andre Bost, Peter Boveng, Jaimie Cleeland, Rochelle Constantine, Stuart Corney, Robert J. M. Crawford, Luciano Dalla Rosa, P. J. Nico de Bruyn, Karine Delord, Sebastien Descamps, Mike Double, Louise Emmerson, Mike Fedak, Ari Friedlaender, Nick Gales, Michael E. Goebel, Kimberly T. Goetz, Christophe Guinet, Simon D. Goldsworthy, Rob Harcourt, Jefferson T. Hinke, Kerstin Jerosch, Akiko Kato, Knowles R. Kerry, Roger Kirkwood, Gerald L. Kooyman, Kit M. Kovacs, Kieran Lawton, Andrew D. Lowther, Christian Lydersen, Phil O'B Lyver, Azwianewi B. Makhado, Maria E. Marquez, Birgitte McDonald, Clive R. McMahon, Monica Muelbert, Dominik Nachtsheim, Keith W. Nicholls, Erling S. Nordoy, Silvia Olmastroni, Richard A. Phillips, Pierre Pistorius, Joachim Ploetz, Klemens Puetz, Norman Ratcliffe, Peter G. Ryan, Mercedes Santos, Colin Southwell, Iain Staniland, Akinori Takahashi, Arnaud Tarroux, Wayne Trivelpiece, Ewan Wakefield, Henri Weimerskirch, Barbara Wienecke, Jose C. Xavier, Simon Wotherspoon, Ian D. Jonsen, Ben Raymond
Article
Multidisciplinary Sciences
Jaimie B. Cleeland, Deborah Pardo, Ben Raymond, Aleks Terauds, Rachael Alderman, Clive R. McMahon, Richard A. Phillips, Mary-Anne Lea, Mark A. Hindell
SCIENTIFIC REPORTS
(2020)
Article
Multidisciplinary Sciences
Yan Ropert-Coudert, Anton P. Van de Putte, Ryan R. Reisinger, Horst Bornemann, Jean-Benoit Charrassin, Daniel P. Costa, Bruno Danis, Luis A. Huckstadt, Ian D. Jonsen, Mary-Anne Lea, David Thompson, Leigh G. Torres, Philip N. Trathan, Simon Wotherspoon, David G. Ainley, Rachael Alderman, Virginia Andrews-Goff, Ben Arthur, Grant Ballard, John Bengtson, Marthan N. Bester, Arnoldus Schytte Blix, Lars Boehme, Charles-Andre Bost, Peter Boveng, Jaimie Cleeland, Rochelle Constantine, Robert J. M. Crawford, Luciano Dalla Rosa, Nico P. J. de Bruyn, Karine Delord, Sebastien Descamps, Mike Double, Louise Emmerson, Mike Fedak, Ari Friedlaender, Nick Gales, Mike Goebel, Kimberly T. Goetz, Christophe Guinet, Simon D. Goldsworthy, Rob Harcourt, Jefferson T. Hinke, Kerstin Jerosch, Akiko Kato, Knowles R. Kerry, Roger Kirkwood, Gerald L. Kooyman, Kit M. Kovacs, Kieran Lawton, Andrew D. Lowther, Christian Lydersen, Phil O'B. Lyver, Azwianewi B. Makhado, Maria E. I. Marquez, Birgitte I. McDonald, Clive R. McMahon, Monica Muelbert, Dominik Nachtsheim, Keith W. Nicholls, Erling S. Nordoy, Silvia Olmastroni, Richard A. Phillips, Pierre Pistorius, Joachim Ploetz, Klemens Puetz, Norman Ratcliffe, Peter G. Ryan, Mercedes Santos, Colin Southwell, Iain Staniland, Akinori Takahashi, Arnaud Tarroux, Wayne Trivelpiece, Ewan Wakefield, Henri Weimerskirch, Barbara Wienecke, Jose C. Xavier, Ben Raymond, Mark A. Hindell
Article
Ecology
Ian D. Jonsen, Toby A. Patterson, Daniel P. Costa, Philip D. Doherty, Brendan J. Godley, W. James Grecian, Christophe Guinet, Xavier Hoenner, Sarah S. Kienle, Patrick W. Robinson, Stephen C. Votier, Scott Whiting, Matthew J. Witt, Mark A. Hindell, Robert G. Harcourt, Clive R. McMahon
Article
Ecology
Mark A. Hindell, Clive R. McMahon, Ian Jonsen, Robert Harcourt, Fernando Arce, Christophe Guinet
Summary: Partitioning resources is an important strategy for avoiding intraspecific competition in highly sexually dimorphic species like the southern elephant seal, where intersexual and intrasexual differences in habitat use are evident. These differences are likely due to a complex interplay of life history strategies, environmental conditions, and predation pressure.
ECOLOGY AND EVOLUTION
(2021)
Article
Ecology
Sophia Volzke, Clive R. McMahon, Mark A. Hindell, Harry R. Burton, Simon J. Wotherspoon
Summary: This study investigates the impact of changing environmental conditions in the Southern Ocean on southern elephant seal populations. It found that climate factors affect the survival rates of juvenile and adult seals, with the Southern Annular Mode and Southern Oscillation Index being important influencing factors.
ECOLOGY AND EVOLUTION
(2021)
Article
Oceanography
N. Ribeiro, L. Herraiz-Borreguero, S. R. Rintoul, C. R. McMahon, M. Hindell, R. Harcourt, G. Williams
Summary: The study found that Vincennes Bay has the warmest recorded intrusions of modified Circumpolar Deep Water (mCDW) in East Antarctica, with warm mCDW driving basal melt under Vanderford and Underwood ice shelves. The research also provides the first direct observational evidence for the inflow of meltwater to the region, increasing stratification and hindering DSW formation, thus impeding AABW production.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
Article
Biology
Fernando Arce, Mark A. Hindell, Clive R. McMahon, Simon J. Wotherspoon, Christophe Guinet, Robert G. Harcourt, Sophie Bestley
Summary: Antarctic polynyas are persistent open water areas that enable phytoplankton blooms. A study on southern elephant seals showed that most of them forage in polynyas and gain more energy from doing so. Despite other factors influencing their choice of feeding grounds, polynyas remain important for foraging.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2022)
Article
Ecology
Hassen Allegue, Christophe Guinet, Samantha C. Patrick, Mark A. Hindell, Clive R. McMahon, Denis Reale
Summary: This study investigates the individual differences in seasonal foraging habitat selection of southern elephant seals based on sex, body size, and boldness. The study found that males and females exhibit different habitat preferences, with males selecting more productive habitats and females selecting less productive ones. The results also show a seasonal shift in habitat selection, with seals moving from Antarctic habitats in the summer to subantarctic and subtropical habitats in the winter.
ECOLOGY AND EVOLUTION
(2022)
Article
Oceanography
Esther Portela, Stephen R. Rintoul, Sophie Bestley, Laura Herraiz-Borreguero, Esmee Wijk, Clive R. McMahon, Fabien Roquet, Mark Hindell
Summary: Using data collected from instrumented southern elephant seals, this study provides a detailed description of the spatial distribution, seasonality, and transformation of main water masses within MacKenzie Polynya in Prydz Bay, East Antarctica. The formation of Dense Shelf Water (DSW) in the polynya is affected by local bathymetry, water column preconditioning, and proximity to Amery Ice Shelf meltwater outflow. The study found sustained sea ice production and brine rejection in this polynya from April to October, with new DSW formation starting in June.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
Article
Biodiversity Conservation
Michelle Chua, Simon Y. W. Ho, Clive R. McMahon, Ian D. Jonsen, Mark de Bruyn
Summary: This study combined genetic and animal tracking data to investigate the mitochondrial haplotype diversity, natal source populations, and movement behaviors of southern elephant seals at Davis Base. The majority of seals originated from breeding populations in the South Atlantic Ocean and South Indian Ocean, while the Macquarie Island population is declining.
Article
Ecology
Ian D. D. Jonsen, W. James Grecian, Lachlan Phillips, Gemma Carroll, Clive McMahon, Robert G. G. Harcourt, Mark A. A. Hindell, Toby A. A. Patterson
Summary: Animal tracking data is vital for understanding the behavior, ecology, and physiology of mobile or cryptic species. Noise in the data due to imperfect measurement technologies can hinder meaningful signals, necessitating rigorous quality control in comprehensive analysis. State-space models are powerful tools to separate signal from noise, particularly for error-prone location data, enabling inference of animal movements. However, fitting these statistical models to diverse animal tracking data sets can be challenging and time-consuming. The R package aniMotum simplifies quality control and movement inference tasks for animal tracking data.
METHODS IN ECOLOGY AND EVOLUTION
(2023)
Article
Oceanography
Esther Portela, Stephen R. Rintoul, Laura Herraiz-Borreguero, Fabien Roquet, Sophie Bestley, Esmee van Wijk, Takeshi Tamura, Clive R. McMahon, Christophe Guinet, Robert Harcourt, Mark A. Hindell
Summary: Coastal polynyas are important regions for dense shelf water (DSW) formation, and their formation is regulated by factors such as physiographic setting, water-mass distribution and transformation, water column stratification, and sea-ice production. Our study highlights the complex combination of factors that contribute to DSW formation in polynyas, some of which may be affected by climate change, with potential implications for deep ocean ventilation and Antarctic ice shelf melting.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
Article
Multidisciplinary Sciences
Sophia Volzke, Jaimie B. Cleeland, Mark A. Hindell, Stuart P. Corney, Simon J. Wotherspoon, Clive R. McMahon
Summary: Southern elephant seals, which are highly dimorphic and extremely polygynous, exhibit clear differences in survival rates between males and females of different ages. While overall juvenile survival rates were stable around 80-85% for both sexes, male survival rates were consistently 5-10% lower than females until the age of 8. At this point, male survival rapidly decreased to 50% while female survival rates remained constant at 80%. These differences may be attributed to varying energetic requirements between adult males and females and are less distinct during early juvenile development. Our findings suggest that sex-specific adult survival in this species is influenced by ecological interactions and evolutionary specialization associated with being a highly polygynous marine predator.
ROYAL SOCIETY OPEN SCIENCE
(2023)
Article
Environmental Sciences
Clive R. R. McMahon, Mark A. A. Hindell, Jean Benoit Charrassin, Richard Coleman, Christophe. Guinet, Robert Harcourt, Sara Labrousse, Benjemin Raymond, Michael Sumner, Natalia Ribeiro
Summary: Depth data from over 500,000 tagged seal dives on the East Antarctic continental shelf improves bathymetry maps and reveals new features. These data help understand the oceanographic processes affecting Antarctica's role in global climate. Incorporating seal dive data improves bathymetry of 22% to 60% of the sampled area, uncovering new features such as troughs and canyons.
COMMUNICATIONS EARTH & ENVIRONMENT
(2023)