Responses of Australian sea lions, Neophoca cinerea, to anthropogenic activities in the Perth metropolitan area, Western Australia

Osterrieder, Sylvia K.; Kent, Chandra Salgado; Robinson, Ross

doi:10.1002/aqc.2668

Cited by 10 publications

(12 citation statements)

References 53 publications

(91 reference statements)

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“…Visual observations have been used to quantify activity budgets and estimate changes in behaviors such as resting or foraging in the presence of other human activities, such as whale watching (e.g., Christiansen, Rasmussen, & Lusseau, ; Lusseau, ; New et al., ; Williams, Trites, & Bain, ). Visual studies on pinnipeds have also monitored flushing response and return to haul‐out sites (e.g., Cowling, Kirkwood, Boren, Sutherland, & Scarpaci, ; Osterrieder, Salgado Kent, & Robinson, ). Passive acoustic monitoring techniques offer a more continuous alternative to visual sampling for collecting such data on cetaceans.…”

Section: Effect Of Exposure On Physiology and Behaviormentioning

confidence: 99%

“…The arrows indicate the functional steps of the framework (simplified on top) that were included in each study. White gaps in the arrows indicate studies that evaluated the link between behavior and vital rates directly, without estimating health Boren, Sutherland, & Scarpaci, 2015;Osterrieder, Salgado Kent, & Robinson, 2017). Passive acoustic monitoring techniques offer a more continuous alternative to visual sampling for collecting such data on cetaceans.…”

Section: Effec T Of E Xp Osure On Phys Iology and B Ehaviormentioning

confidence: 99%

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Understanding the population consequences of disturbance

Pirotta

Booth²,

Costa

et al. 2018

Ecology and Evolution

214

217

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Managing the nonlethal effects of disturbance on wildlife populations has been a long‐term goal for decision makers, managers, and ecologists, and assessment of these effects is currently required by European Union and United States legislation. However, robust assessment of these effects is challenging. The management of human activities that have nonlethal effects on wildlife is a specific example of a fundamental ecological problem: how to understand the population‐level consequences of changes in the behavior or physiology of individual animals that are caused by external stressors. In this study, we review recent applications of a conceptual framework for assessing and predicting these consequences for marine mammal populations. We explore the range of models that can be used to formalize the approach and we identify critical research gaps. We also provide a decision tree that can be used to select the most appropriate model structure given the available data. Synthesis and applications: The implementation of this framework has moved the focus of discussion of the management of nonlethal disturbances on marine mammal populations away from a rhetorical debate about defining negligible impact and toward a quantitative understanding of long‐term population‐level effects. Here we demonstrate the framework's general applicability to other marine and terrestrial systems and show how it can support integrated modeling of the proximate and ultimate mechanisms that regulate trait‐mediated, indirect interactions in ecological communities, that is, the nonconsumptive effects of a predator or stressor on a species' behavior, physiology, or life history.

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Section: Effect Of Exposure On Physiology and Behaviormentioning

confidence: 99%

Section: Effec T Of E Xp Osure On Phys Iology and B Ehaviormentioning

confidence: 99%

Understanding the population consequences of disturbance

Pirotta

Booth²,

Costa

et al. 2018

Ecology and Evolution

214

217

View full text Add to dashboard Cite

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“…In 2015, there were an estimated 12,290–13,090 individuals remaining in the wild and of these only 16% are found in Western Australia (Goldsworthy, ). Australian sea lions are distributed between the Abrolhos Islands in Western Australia and The Pages in South Australia (Ling, ), with mostly small and widely scattered colonies, at both remote (Goldsworthy, ; Goldsworthy et al., ) and near metropolitan areas (Osterrieder, Salgado Kent, & Robinson, , ). Despite several dietary studies (Casper et al., ; Gales & Cheal, ; Kirkwood & Goldsworthy, ; Ling, ; Peters et al., ), much of what this apex predator targets remains poorly defined due to the well‐recognized limits of morphological identification of scat material and/or behavioral studies (Kirkwood & Goldsworthy, ).…”

Section: Introductionmentioning

confidence: 99%

DNA metabarcoding for diet analysis and biodiversity: A case study using the endangered Australian sea lion (Neophoca cinerea)

Berry

Osterrieder

Murray

et al. 2017

Ecology and Evolution

Self Cite

157

126

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The analysis of apex predator diet has the ability to deliver valuable insights into ecosystem health, and the potential impacts a predator might have on commercially relevant species. The Australian sea lion (Neophoca cinerea) is an endemic apex predator and one of the world's most endangered pinnipeds. Given that prey availability is vital to the survival of top predators, this study set out to understand what dietary information DNA metabarcoding could yield from 36 sea lion scats collected across 1,500 km of its distribution in southwest Western Australia. A combination of PCR assays were designed to target a variety of potential sea lion prey, including mammals, fish, crustaceans, cephalopods, and birds. Over 1.2 million metabarcodes identified six classes from three phyla, together representing over 80 taxa. The results confirm that the Australian sea lion is a wide‐ranging opportunistic predator that consumes an array of mainly demersal fauna. Further, the important commercial species Sepioteuthis australis (southern calamari squid) and Panulirus cygnus (western rock lobster) were detected, but were present in <25% of samples. Some of the taxa identified, such as fish, sharks and rays, clarify previous knowledge of sea lion prey, and some, such as eel taxa and two gastropod species, represent new dietary insights. Even with modest sample sizes, a spatial analysis of taxa and operational taxonomic units found within the scat shows significant differences in diet between many of the sample locations and identifies the primary taxa that are driving this variance. This study provides new insights into the diet of this endangered predator and confirms the efficacy of DNA metabarcoding of scat as a noninvasive tool to more broadly define regional biodiversity.

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“…Consequently, much of the research examining vessel traffic has focused on the easily observable reactions of hauled-out pinnipeds to approaching boats and ships. This includes the haul-out behavior of harbor seals (Phoca vitulina) (Andersen et al, 2012;Blundell and Pendleton, 2015), Australian fur seals (Arctocephalus pusillus doriferus) (Stafford-Bell et al, 2012), Saimaa ringed seals (Phoca hispida saimensis) (Niemi et al, 2013), Australian sea lions (Neophoca cinerea) (Osterrieder et al, 2017), and walrus (Odobenus rosmarus) (Øren et al, 2018). A small number of studies also extend observations to the water surrounding haul-out sites (Osterrieder et al, 2017).…”

Section: Pinnipedsmentioning

confidence: 99%

“…This includes the haul-out behavior of harbor seals (Phoca vitulina) (Andersen et al, 2012;Blundell and Pendleton, 2015), Australian fur seals (Arctocephalus pusillus doriferus) (Stafford-Bell et al, 2012), Saimaa ringed seals (Phoca hispida saimensis) (Niemi et al, 2013), Australian sea lions (Neophoca cinerea) (Osterrieder et al, 2017), and walrus (Odobenus rosmarus) (Øren et al, 2018). A small number of studies also extend observations to the water surrounding haul-out sites (Osterrieder et al, 2017). Common reactions of pinnipeds to approaching vessels include flushing off haul-out sites into the sea (Jansen et al, 2010;Andersen et al, 2012;Blundell and Pendleton, 2015), increased alertness (Henry and Hammill, 2001), and head raising (Niemi et al, 2013).…”

Section: Pinnipedsmentioning

confidence: 99%

The Effects of Ship Noise on Marine Mammals—A Review

et al. 2019

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The number of marine watercraft is on the rise-from private boats in coastal areas to commercial ships crossing oceans. A concomitant increase in underwater noise has been reported in several regions around the globe. Given the important role sound plays in the life functions of marine mammals, research on the potential effects of vessel noise has grown-in particular since the year 2000. We provide an overview of this literature, showing that studies have been patchy in terms of their coverage of species, habitats, vessel types, and types of impact investigated. The documented effects include behavioral and acoustic responses, auditory masking, and stress. We identify knowledge gaps: There appears a bias to more easily accessible species (i.e., bottlenose dolphins and humpback whales), whereas there is a paucity of literature addressing vessel noise impacts on river dolphins, even though some of these species experience chronic noise from boats. Similarly, little is known about the potential effects of ship noise on pelagic and deep-diving marine mammals, even though ship noise is focused in a downward direction, reaching great depth at little acoustic loss and potentially coupling into sound propagation channels in which sound may transmit over long ranges. We explain the fundamental concepts involved in the generation and propagation of vessel noise and point out common problems with both physics and biology: Recordings of ship noise might be affected by unidentified artifacts, and noise exposure can be both under-and over-estimated by tens of decibel if the local sound propagation conditions are not considered. The lack of anthropogenic (e.g., different vessel types), environmental (e.g., different sea states or presence/absence of prey), and biological (e.g., different demographics) controls is a common problem, as is a lack of understanding what constitutes the 'normal' range of behaviors. Last but not least, the biological significance of observed responses is mostly unknown. Moving forward, standards on study design, data analysis, and reporting are badly needed so that results are comparable (across space and time) and so that data can be synthesized to address the grand unknowns: the role of context and the consequences of chronic exposures.

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Responses of Australian sea lions, Neophoca cinerea, to anthropogenic activities in the Perth metropolitan area, Western Australia

Cited by 10 publications

References 53 publications

Understanding the population consequences of disturbance

Understanding the population consequences of disturbance

DNA metabarcoding for diet analysis and biodiversity: A case study using the endangered Australian sea lion (Neophoca cinerea)

The Effects of Ship Noise on Marine Mammals—A Review

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