Behavioural maintenance of highly localised jellyfish (Copula sivickisi, class Cubozoa) populations

Schlaefer, Jodie A.; Wolanski, Eric; Yadav, Shreya; Kingsford, Michael J.

doi:10.1007/s00227-020-3646-6

Cited by 10 publications

(20 citation statements)

References 49 publications

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“…JellyCams (JCAMS) (Schlaefer et al 2020) and counts of jellyfish within a few metres of the lights were useful for determining the presence/absence of jellyfish, as well as abundance. Clearly the JCAMs provided a more accurate estimate of relative abundance than eDNA, but the two techniques combined are useful, particularly when jellyfish are rare and are less likely to be detected in lights.…”

Section: Discussionmentioning

confidence: 99%

“…Abundance estimates: Over the course of 5 nights, medusae were collected in known jellyfish 'hotspots' (Schlaefer et al 2020) between September andNovember for C. sivickisi and one night for C. xaymacana. Sites were separated by tens to hundreds of metres in shallow waters near Magnetic Island, North Queensland (19.1359 o S, 146.842 o E) ( Table 3).…”

Section: Experiments 2: Field Experimentsmentioning

confidence: 99%

“…Sites were separated by tens to hundreds of metres in shallow waters near Magnetic Island, North Queensland (19.1359 o S, 146.842 o E) ( Table 3). The medusae of C. sivickisi and C. xaymacana are photopositive and were attracted to lights using 'JellyCams' (Schlaefer et al 2020); in this way it was possible to estimate the presence and abundance of jellyfishes. Each 'JellyCam' had an LED torch (2000 lumens) attached to weighted crates.…”

Section: Experiments 2: Field Experimentsmentioning

confidence: 99%

“…The presence of C. sivickisi medusa in waters surrounding Magnetic Island is highly seasonal (Schlaefer et al 2020), restricted to the spring-summer period. This species, therefore, provided a good model to determine if eDNA could detect the presence of cubozoan polyps when adults were absent.…”

Section: Experiments 3: Detection Of Life Stagesmentioning

confidence: 99%

“…Moreover, within stocks small geographic areas such as bays may be considered 'local populations' that can have a high level of connectivity (Kingsford & Mooney 2014). Recent research has suggested that even small local populations of some cubozoans may have little exchange with other populations (Schlaefer et al 2020); but critical to understanding levels of connectivity is a knowledge of the movements of medusa and the sources of polyps. The accurate detection of cubozoans is critical for minimising the risk of envenomation to humans and to better understand their ecology (Kingsfordet al 2018).…”

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confidence: 99%

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Validation of eDNA as a viable method of detection for dangerous cubozoan jellyfish

Bolte

Goldsbury

Huerlimann

et al. 2020

Preprint

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Stings from certain species of cubozoan jellyfish are dangerous to humans and their seasonal presence in tropical marine waters poses a significant risk to coastal communities. The detection of cubozoans is difficult due to high spatial and temporal variation in their occurrence and abundance. Environmental DNA (eDNA) has the potential to detect rare species and therefore offers potential to detect cubozoans, not only pelagic medusae, but presence of cryptic polyp life-stages. The objective of this study was to validate the use of eDNA as a viable detection method for four cubozoan species (Chironex fleckeri, Copula sivickisi, Carybdea xaymacana and Carukia barnesi). Species-specific primers were developed for each of these four cubozoans and an eDNA approach validated utilising both laboratory and field trials. Laboratory DNA degradation experiments demonstrated that C. sivickisi DNA degraded quickly but could still be detected in sea water for up to 9 days post-jellyfish removal. Positive detection was found for C. fleckeri, C. xaymacana and C. sivickisi medusae in the waters surrounding Magnetic Island, Queensland, in the Austral spring/summer (September-January). Based on visual surveys there was a poor relationship between concentration of eDNA and abundance of jellyfish. Positive eDNA amplification was also shown near the substratum when C. sivickisi medusae were absent. This can only be explained by the detection of polyps. Consequently, eDNA is an effective tool to detect both the medusae and polyps of cubozoans. This approach provides the means to reduce the risk of envenomation to swimmers and enhance our knowledge of cubozoan ecology.

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Section: Discussionmentioning

confidence: 99%

Section: Experiments 2: Field Experimentsmentioning

confidence: 99%

Section: Experiments 2: Field Experimentsmentioning

confidence: 99%

Section: Experiments 3: Detection Of Life Stagesmentioning

confidence: 99%

mentioning

confidence: 99%

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Validation of eDNA as a viable method of detection for dangerous cubozoan jellyfish

Bolte

Goldsbury

Huerlimann

et al. 2020

Preprint

View full text Add to dashboard Cite

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Validation of eDNA as a viable method of detection for dangerous cubozoan jellyfish

et al. 2021

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Stings from certain species of cubozoan jellyfish are dangerous to humans and their seasonal presence in tropical marine waters poses a significant risk to coastal communities. The detection of cubozoans is difficult due to high spatial and temporal variation in their occurrence and abundance. Environmental DNA (eDNA) has the potential to detect rare species and therefore offers potential to detect cubozoans, not only pelagic medusae, but presence of cryptic polyp life stages. The objective of this study was to validate the use of eDNA as a viable detection method for four cubozoan species (Chironex fleckeri, Copula sivickisi, Carybdea xaymacana, and Carukia barnesi). Species-specific primers were developed for each of these four cubozoans and an eDNA approach validated utilizing both laboratory and field trials. Laboratory DNA degradation experiments demonstrated that C. sivickisi DNA degraded quickly but could still be detected in sea water for up to 9 days post-jellyfish removal.Positive detection was found for C. fleckeri, C. xaymacana, and C. sivickisi medusae in the waters surrounding Magnetic Island, Queensland, in the Austral spring/summer (September-January). Based on visual surveys, there was a poor relationship between concentration of eDNA and abundance of jellyfish. Positive eDNA amplification was also found from water sampled near the substratum when C. sivickisi medusae were out of season and absent. This suggests the eDNA analysis was likely detecting C. sivickisi polyps located within the substratum. Consequently, eDNA is an effective tool to detect both the medusae and likely polyps of cubozoans. This approach provides the means to reduce the risk of envenomation to swimmers and enhance our knowledge of cubozoan ecology.

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The utility of jellyfish as marine biomonitors

Templeman

McKenzie

Kingsford

2021

Marine Pollution Bulletin

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Behavioural maintenance of highly localised jellyfish (Copula sivickisi, class Cubozoa) populations

Cited by 10 publications

References 49 publications

Validation of eDNA as a viable method of detection for dangerous cubozoan jellyfish

Validation of eDNA as a viable method of detection for dangerous cubozoan jellyfish

Validation of eDNA as a viable method of detection for dangerous cubozoan jellyfish

The utility of jellyfish as marine biomonitors

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