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  1. Article ; Online: Abundance, survival and population growth of killer whales Orcinus orca at subantarctic Marion Island

    Jordaan, Rowan K. / Oosthuizen, W. Chris / Reisinger, Ryan R. / Nico De Bruyn, P. J.

    Wildlife biology. 2020 Oct. 8, v. 2020, no. 4, p. wlb.00732

    2020  

    Abstract: Killer whales, Orcinus orca, are a cosmopolitan species with large ecological and demographic variation across populations. Population-specific demographic studies are, therefore, crucial in accurately assessing the status and trends of local killer ... ...

    Abstract Killer whales, Orcinus orca, are a cosmopolitan species with large ecological and demographic variation across populations. Population-specific demographic studies are, therefore, crucial in accurately assessing the status and trends of local killer whale populations. Such studies require long-term datasets and remain scarce, particularly in the Southern Ocean where detailed population specific studies have only been conducted at a single archipelago – Îles Crozet. Here, we analysed 12 years of capture–recapture data (comprising nearly 90 000 identification photographs taken from 2006 to 2018) of killer whales at subantarctic Marion Island (46°54′S, 37°45′E) to estimate the abundance, survival and growth rate of this population. Demographic parameters were estimated using multistate capture recapture models, and Pradel Survival-Lambda and POPAN single-state models implemented in the program MARK. Annual survival probability (0.98 [95% CI: 0.96–0.99]) was constant over time, and no important differences between sexes and age-classes (calves, juveniles, adults) were found. This estimate of survival suggests a life expectancy of approximately 48 years. Realised mean population growth rate (λ) was 1.012 (0.987–1.037) with an estimated population size of 54 (54–60) individuals and a mean calving rate of 0.13 (0.06–0.20) calves born per year per reproductive female. The survival and reproduction rates of killer whales at Marion Island are similar to those of killer whale populations in the eastern North Pacific, Norway and Îles Crozet. However, subtle differences in survival and reproduction rates are present. These are likely the result of local differences in resource abundances, historical impacts on social structure and/or stressors. Also, the presence and scale of fisheries (legal and illegal) in the area may provide opportunities for direct interactions with fishing activities impacting survival and reproduction rates.
    Keywords Orcinus orca ; data collection ; females ; longevity ; mark-recapture studies ; population growth ; population size ; probability ; social structure ; wildlife ; Norway
    Language English
    Dates of publication 2020-1008
    Size p. wlb.00732
    Publishing place Nordic Board for Wildlife Research
    Document type Article ; Online
    Note NAL-AP-2-clean
    ZDB-ID 1291831-3
    ISSN 0909-6396
    ISSN 0909-6396
    DOI 10.2981/wlb.00732
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Bonn / Germany

    Z 7022: Show issues

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  2. Article: Selective disappearance of frail juveniles: consequences for understanding social dominance in adult male elephant seals

    Lloyd, Kyle J / Oosthuizen, W. Chris / Fay, Rémi / Bester, Marthán N / Nico de Bruyn, P. J

    Oikos. 2020 Oct., v. 129, no. 10

    2020  

    Abstract: Individual heterogeneity is variation in trait expression observed among individuals of a population. Individual heterogeneity in the pre‐breeder stage of development is of importance given its eventual contribution to the breeding population's overall ... ...

    Abstract Individual heterogeneity is variation in trait expression observed among individuals of a population. Individual heterogeneity in the pre‐breeder stage of development is of importance given its eventual contribution to the breeding population's overall reproductive performance. Yet most studies do not consider the role of individual heterogeneity in pre‐breeders when investigating population processes. We investigated individual heterogeneity in the survival and recruitment probabilities of pre‐breeding male southern elephant seals Mirounga leonina using 34 years of data collected at Marion Island. Elephant seals are highly polygynous capital breeders, with few male offspring surviving to compete in breeding events and even fewer breeding successfully. Specifically, we fitted finite‐mixture models with two hidden groups that represented ‘robust’ and ‘frail’ individuals and compared the demographic rates of these groups to that of the population. Survival and recruitment as first‐time subordinate breeders could be distinguished between groups. Survival of both robust and frail pre‐breeders decreased from age 2, whilst differences between groups were maintained (ontogeny processes). Frail pre‐breeders had a much lower survival than the population average, suggesting that frail individuals were preferentially removed from the population (selective disappearance). Differences in recruitment probabilities were apparent from age 5 (earliest recorded age) and increased until age 7, with most recruits comprising robust pre‐breeders. Male pre‐breeders were more likely to be robust at age 2 when born in years with few conspecifics, suggesting that individual heterogeneity was determined, in part, by density‐dependent effects. A population projection model revealed that male breeders of every age class never consisted of more than 5% of frail recruits. Rather, the breeding population increasingly consisted of robust recruits that obtained social dominance with age. We demonstrated that individual heterogeneity in male pre‐breeder demographic rates was present and persistent throughout much of development and determined the proportion of adult males that obtained social dominance.
    Keywords Mirounga leonina ; adults ; age ; capital breeding ; data collection ; juveniles ; males ; models ; ontogeny ; polygyny ; population ; progeny ; reproductive performance ; social dominance
    Language English
    Dates of publication 2020-10
    Size p. 1566-1578.
    Publishing place Blackwell Publishing Ltd
    Document type Article
    Note NAL-light ; JOURNAL ARTICLE
    ZDB-ID 207359-6
    ISSN 0030-1299
    ISSN 0030-1299
    DOI 10.1111/oik.07434
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Bonn / Germany

    Z 4824: Show issues

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  3. Article ; Online: Translating Marine Animal Tracking Data into Conservation Policy and Management.

    Hays, Graeme C / Bailey, Helen / Bograd, Steven J / Bowen, W Don / Campagna, Claudio / Carmichael, Ruth H / Casale, Paolo / Chiaradia, Andre / Costa, Daniel P / Cuevas, Eduardo / Nico de Bruyn, P J / Dias, Maria P / Duarte, Carlos M / Dunn, Daniel C / Dutton, Peter H / Esteban, Nicole / Friedlaender, Ari / Goetz, Kimberly T / Godley, Brendan J /
    Halpin, Patrick N / Hamann, Mark / Hammerschlag, Neil / Harcourt, Robert / Harrison, Autumn-Lynn / Hazen, Elliott L / Heupel, Michelle R / Hoyt, Erich / Humphries, Nicolas E / Kot, Connie Y / Lea, James S E / Marsh, Helene / Maxwell, Sara M / McMahon, Clive R / Notarbartolo di Sciara, Giuseppe / Palacios, Daniel M / Phillips, Richard A / Righton, David / Schofield, Gail / Seminoff, Jeffrey A / Simpfendorfer, Colin A / Sims, David W / Takahashi, Akinori / Tetley, Michael J / Thums, Michele / Trathan, Philip N / Villegas-Amtmann, Stella / Wells, Randall S / Whiting, Scott D / Wildermann, Natalie E / Sequeira, Ana M M

    Trends in ecology & evolution

    2019  Volume 34, Issue 5, Page(s) 459–473

    Abstract: There have been efforts around the globe to track individuals of many marine species and assess their movements and distribution, with the putative goal of supporting their conservation and management. Determining whether, and how, tracking data have ... ...

    Abstract There have been efforts around the globe to track individuals of many marine species and assess their movements and distribution, with the putative goal of supporting their conservation and management. Determining whether, and how, tracking data have been successfully applied to address real-world conservation issues is, however, difficult. Here, we compile a broad range of case studies from diverse marine taxa to show how tracking data have helped inform conservation policy and management, including reductions in fisheries bycatch and vessel strikes, and the design and administration of marine protected areas and important habitats. Using these examples, we highlight pathways through which the past and future investment in collecting animal tracking data might be better used to achieve tangible conservation benefits.
    MeSH term(s) Animals ; Conservation of Natural Resources ; Ecosystem ; Fisheries
    Language English
    Publishing date 2019-03-14
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 284965-3
    ISSN 1872-8383 ; 0169-5347
    ISSN (online) 1872-8383
    ISSN 0169-5347
    DOI 10.1016/j.tree.2019.01.009
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    Zs Bio TEE: Show issues
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  4. Article: Translating Marine Animal Tracking Data into Conservation Policy and Management

    Hays, Graeme C / Bailey, Helen / Bograd, Steven J / Bowen, W. Don / Campagna, Claudio / Carmichael, Ruth H / Casale, Paolo / Chiaradia, Andre / Costa, Daniel P / Cuevas, Eduardo / Nico de Bruyn, P.J / Dias, Maria P / Duarte, Carlos M / Dunn, Daniel C / Dutton, Peter H / Esteban, Nicole / Friedlaender, Ari / Goetz, Kimberly T / Godley, Brendan J /
    Halpin, Patrick N / Hamann, Mark / Hammerschlag, Neil / Harcourt, Robert / Harrison, Autumn-Lynn / Hazen, Elliott L / Heupel, Michelle R / Hoyt, Erich / Humphries, Nicolas E / Kot, Connie Y / Lea, James S.E / Marsh, Helene / Maxwell, Sara M / McMahon, Clive R / Notarbartolo di Sciara, Giuseppe / Palacios, Daniel M / Phillips, Richard A / Righton, David / Schofield, Gail / Seminoff, Jeffrey A / Simpfendorfer, Colin A / Sims, David W / Takahashi, Akinori / Tetley, Michael J / Thums, Michele / Trathan, Philip N / Villegas-Amtmann, Stella / Wells, Randall S / Whiting, Scott D / Wildermann, Natalie E / Sequeira, Ana M.M

    Elsevier Ltd Trends in ecology & evolution. 2019 May, v. 34, no. 5

    2019  

    Abstract: There have been efforts around the globe to track individuals of many marine species and assess their movements and distribution, with the putative goal of supporting their conservation and management. Determining whether, and how, tracking data have ... ...

    Abstract There have been efforts around the globe to track individuals of many marine species and assess their movements and distribution, with the putative goal of supporting their conservation and management. Determining whether, and how, tracking data have been successfully applied to address real-world conservation issues is, however, difficult. Here, we compile a broad range of case studies from diverse marine taxa to show how tracking data have helped inform conservation policy and management, including reductions in fisheries bycatch and vessel strikes, and the design and administration of marine protected areas and important habitats. Using these examples, we highlight pathways through which the past and future investment in collecting animal tracking data might be better used to achieve tangible conservation benefits.
    Keywords animals ; bycatch ; case studies ; habitats ; issues and policy ; marine protected areas
    Language English
    Dates of publication 2019-05
    Size p. 459-473.
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 284965-3
    ISSN 1872-8383 ; 0169-5347
    ISSN (online) 1872-8383
    ISSN 0169-5347
    DOI 10.1016/j.tree.2019.01.009
    Database NAL-Catalogue (AGRICOLA)

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    Kategorien

    In stock of ZB MED Bonn / Germany

    Zs Bio TEE: Show issues
    Z 2005/711: Show issues

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  5. Article ; Online: The retrospective analysis of Antarctic tracking data project.

    Ropert-Coudert, Yan / Van de Putte, Anton P / Reisinger, Ryan R / Bornemann, Horst / Charrassin, Jean-Benoît / Costa, Daniel P / Danis, Bruno / Hückstädt, Luis A / Jonsen, Ian D / Lea, Mary-Anne / Thompson, David / Torres, Leigh G / Trathan, Philip N / Wotherspoon, Simon / Ainley, David G / Alderman, Rachael / Andrews-Goff, Virginia / Arthur, Ben / Ballard, Grant /
    Bengtson, John / Bester, Marthán N / Blix, Arnoldus Schytte / Boehme, Lars / Bost, Charles-André / Boveng, Peter / Cleeland, Jaimie / Constantine, Rochelle / Crawford, Robert J M / Dalla Rosa, Luciano / Nico de Bruyn, P J / Delord, Karine / Descamps, Sébastien / Double, Mike / Emmerson, Louise / Fedak, Mike / Friedlaender, Ari / Gales, Nick / Goebel, Mike / Goetz, Kimberly T / Guinet, Christophe / Goldsworthy, Simon D / Harcourt, Rob / Hinke, Jefferson T / Jerosch, Kerstin / Kato, Akiko / Kerry, Knowles R / Kirkwood, Roger / Kooyman, Gerald L / Kovacs, Kit M / Lawton, Kieran / Lowther, Andrew D / Lydersen, Christian / Lyver, Phil O'B / Makhado, Azwianewi B / Márquez, Maria E I / McDonald, Birgitte I / McMahon, Clive R / Muelbert, Monica / Nachtsheim, Dominik / Nicholls, Keith W / Nordøy, Erling S / Olmastroni, Silvia / Phillips, Richard A / Pistorius, Pierre / Plötz, Joachim / Pütz, Klemens / Ratcliffe, Norman / Ryan, Peter G / Santos, Mercedes / Southwell, Colin / Staniland, Iain / Takahashi, Akinori / Tarroux, Arnaud / Trivelpiece, Wayne / Wakefield, Ewan / Weimerskirch, Henri / Wienecke, Barbara / Xavier, José C / Raymond, Ben / Hindell, Mark A

    Scientific data

    2020  Volume 7, Issue 1, Page(s) 94

    Abstract: The Retrospective Analysis of Antarctic Tracking Data (RAATD) is a Scientific Committee for Antarctic Research project led jointly by the Expert Groups on Birds and Marine Mammals and Antarctic Biodiversity Informatics, and endorsed by the Commission for ...

    Abstract The Retrospective Analysis of Antarctic Tracking Data (RAATD) is a Scientific Committee for Antarctic Research project led jointly by the Expert Groups on Birds and Marine Mammals and Antarctic Biodiversity Informatics, and endorsed by the Commission for the Conservation of Antarctic Marine Living Resources. RAATD consolidated tracking data for multiple species of Antarctic meso- and top-predators to identify Areas of Ecological Significance. These datasets and accompanying syntheses provide a greater understanding of fundamental ecosystem processes in the Southern Ocean, support modelling of predator distributions under future climate scenarios and create inputs that can be incorporated into decision making processes by management authorities. In this data paper, we present the compiled tracking data from research groups that have worked in the Antarctic since the 1990s. The data are publicly available through biodiversity.aq and the Ocean Biogeographic Information System. The archive includes tracking data from over 70 contributors across 12 national Antarctic programs, and includes data from 17 predator species, 4060 individual animals, and over 2.9 million observed locations.
    Language English
    Publishing date 2020-03-18
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2775191-0
    ISSN 2052-4463 ; 2052-4463
    ISSN (online) 2052-4463
    ISSN 2052-4463
    DOI 10.1038/s41597-020-0406-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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