Incorporating stable isotopes into a multidisciplinary framework to improve data inference and their conservation and management application

Christiansen, HM; Fisk, AT; Hussey, NE

doi:10.2989/1814232x.2015.1039583

Cited by 12 publications

(18 citation statements)

References 89 publications

(99 reference statements)

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“…Incorporating genetic or genomic approaches to telemetry studies will provide managers with the sorts of data that can bolster the delineation of management boundaries and preserve genetic diversity (Christiansen et al 2015, Stewart et al 2016, while chemical tracers like stable isotopes and trace elements can provide a means for determining site fidelities to areas critical to different life-history stages (juvenile rearing, reproduction, etc. ; Bergstad et al 2008, Honda et al 2012, Matich and Heithaus 2014, Papastamatiou et al 2015.…”

Section: Defining Management Unitsmentioning

confidence: 99%

Acoustic telemetry and fisheries management

Crossin

Heupel

Holbrook

et al. 2017

Ecological Applications

282

196

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This paper reviews the use of acoustic telemetry as a tool for addressing issues in fisheries management, and serves as the lead to the special Feature Issue of Ecological Applications titled Acoustic Telemetry and Fisheries Management. Specifically, we provide an overview of the ways in which acoustic telemetry can be used to inform issues central to the ecology, conservation, and management of exploited and/or imperiled fish species. Despite great strides in this area in recent years, there are comparatively few examples where data have been applied directly to influence fisheries management and policy. We review the literature on this issue, identify the strengths and weaknesses of work done to date, and highlight knowledge gaps and difficulties in applying empirical fish telemetry studies to fisheries policy and practice. We then highlight the key areas of management and policy addressed, as well as the challenges that needed to be overcome to do this. We conclude with a set of recommendations about how researchers can, in consultation with stock assessment scientists and managers, formulate testable scientific questions to address and design future studies to generate data that can be used in a meaningful way by fisheries management and conservation practitioners. We also urge the involvement of relevant stakeholders (managers, fishers, conservation societies, etc.) early on in the process (i.e., in the co-creation of research projects), so that all priority questions and issues can be addressed effectively.

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Section: Defining Management Unitsmentioning

confidence: 99%

Acoustic telemetry and fisheries management

Crossin

Heupel

Holbrook

et al. 2017

Ecological Applications

282

196

View full text Add to dashboard Cite

show abstract

“…The field of trophic ecology has seen a substantial increase in the number of available techniques and applications across aquatic and terrestrial taxa within the last half century (Layman et al, 2012(Layman et al, , 2015Christiansen et al, 2015;Nielsen et al, 2015;Young et al, 2015;Roslin and Majaneva, 2016). More recently, there has been a growing number of studies moving from traditional stomach-content analysis, which may provide a potentially limited view due to differences in digestibility among prey species (Hyslop, 1980), to time-integrated biochemical methods (reviewed in Traugott et al, 2013;Pethybridge et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Assessing the Functional Limitations of Lipids and Fatty Acids for Diet Determination: The Importance of Tissue Type, Quantity, and Quality

et al. 2017

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Lipid and fatty acid (FA) analysis is commonly used to describe the trophic ecology of an increasing number of taxa. However, the applicability of these analyses is contingent upon the collection and storage of sufficient high quality tissue, the limitations of which are previously unexplored in elasmobranchs. Using samples from 110 white sharks, Carcharodon carcharias, collected throughout Australia, we investigated the importance of tissue type, sample quantity, and quality for reliable lipid class and FA analysis. We determined that muscle and sub-dermal tissue contain distinct lipid class and FA profiles, and were not directly comparable. Muscle samples as small as 12 mg dry weight (49 mg wet weight), provided reliable and consistent FA profiles, while sub-dermal tissue samples of 40 mg dry weight (186 mg wet weight) or greater were required to yield consistent profiles. This validates the suitability of minimally invasive sampling methods such as punch biopsies. The integrity of FA profiles in muscle was compromised after 24 h at ambient temperature (∼20 • C), making these degraded samples unreliable for accurate determination of dietary sources, yet sub-dermal tissue retained stable FA profiles under the same conditions, suggesting it may be a more robust tissue for trophic ecology work with potentially degraded samples. However, muscle samples archived for up to 16 years in −20 • C retain their FA profiles, highlighting that tissue from museum or private collections can yield valid insights into the trophic ecology of marine elasmobranchs.

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“…That these tooth types were independent of L T suggests that female C. carcharias may exhibit phenotypic polymorphism. Stable-isotope analyses suggest that some females do not undergo an ontogenetic dietary shift and can show consistent dietary specialization instead (Estrada et al, 2006;Hussey et al, 2012;Kim et al, 2012;Pethybridge et al, 2014;Christiansen et al, 2015). The mechanism behind such specialization, however, has not been elucidated.…”

Section: Discussionmentioning

confidence: 99%

“…As tooth shape is generally accepted to relate to the exploitation of different prey types in C. carcharias (Tricas & McCosker, 1984;Frazzetta, 1988;Hubbell, 1996), it is reasonable to suggest that sharks with cuspidate, intermediate or broad teeth feed preferentially on different prey, constituting trophic polymorphism in females. Potential consequences of specialization in C. carcharias diets include altered food-web structure if changes in resource availability affect tooth morphs differently (Christiansen et al, 2015) and differing levels of bioaccumulation of toxins (Young et al, 2006;Biro & Post, 2008;Härkönen et al, 2014;Mittelbach et al, 2014), an issue already known to pose a significant threat to C. carcharias generally (Schlenk et al, 2005;Mull et al, 2012;Lyons et al, 2013;Marsilli et al, 2016). While geographic variation in female shark tooth shape cannot be ruled out, it seems less likely as no such variation was evident in male teeth.…”

Section: Discussionmentioning

confidence: 99%

“…1). However, the primary reliance of adult C. carcharias on marine mammal prey is arguably overstated (Fergusson et al, 2009) and there is mounting evidence of individual dietary variation that does not appear to be related to sex or age (Estrada et al, 2006;Carlisle et al, 2012;Hussey et al, 2012;Kim et al, 2012;Hamady et al, 2014;Pethybridge et al, 2014;Christiansen et al, 2015;Towner et al, 2016). Individual and sexual differences in foraging strategy have been found (Huveneers et al, 2015;Towner et al, 2016), and there are questions over whether it occurs at all for some individuals (Estrada et al, 2006;Hussey et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The tooth, the whole tooth and nothing but the tooth: tooth shape and ontogenetic shift dynamics in the white sharkCarcharodon carcharias

French

Stürup

Rizzuto

et al. 2017

Journal of Fish Biology

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Results from this study of the white shark Carcharodon carcharias include measurements obtained using a novel photographic method that reveal significant differences between the sexes in the relationship between tooth cuspidity and shark total length, and a novel ontogenetic change in male tooth shape. Males exhibit broader upper first teeth and increased distal inclination of upper third teeth with increasing length, while females do not present a consistent morphological change. Substantial individual variation, with implications for pace of life syndrome, was present in males and tooth polymorphism was suggested in females. Sexual differences and individual variation may play major roles in ontogenetic changes in tooth morphology in C. carcharias, with potential implications for their foraging biology. Such individual and sexual differences should be included in studies of ontogenetic shift dynamics in other species and systems.

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Incorporating stable isotopes into a multidisciplinary framework to improve data inference and their conservation and management application

Cited by 12 publications

References 89 publications

Acoustic telemetry and fisheries management

Acoustic telemetry and fisheries management

Assessing the Functional Limitations of Lipids and Fatty Acids for Diet Determination: The Importance of Tissue Type, Quantity, and Quality

The tooth, the whole tooth and nothing but the tooth: tooth shape and ontogenetic shift dynamics in the white sharkCarcharodon carcharias

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