Abstract:Hyperiid amphipods (Order Amphipoda, Suborder Hyperiidea) are known to infest gelatinous zooplankton. However, the temporal backdrop to these associations is less clear, given that data are often gathered during discrete sampling events rather than over time. In general, hyperiids are considered to be pelagic: however, for individuals associated with metagenic jellyfishes in temperate shallow shelf seas, this may not always be the case, as the majority of their gelatinous hosts are present in the water column … Show more
“…Considering that pelagic phytoplankton, macroalgae and benthic microalgae are the main sources of primary production in this area (Reddin et al 2015) and the fact that C. plocamia (Ceh et al 2015) and hyperiid amphiods (Fleming et al 2014) may use benthic resources, samples of macroalgae, particulate organic matter (POM) and benthic algae/biofilm were collected from subtidal locations on the Mejillones peninsula adjacent to Mejillones Bay to include them as potential energy sources in our analysis. Epilithic biofilm was scraped from rocks using a metal spatula, a 5 l water sample was collected for POM, and fronds of the dominant brown alga (Lessonia nigrescens) were collected, with tissue taken from frond areas of recent growth.…”
Section: Sample Collectionmentioning
confidence: 99%
“…Benthic sources were included following a recent report of their contribution to Hyperia in a coastal system in the North-East Atlantic (Fleming et al 2014) as well as our interest in the potential shift in host habitat use with size. δ 13 C and δ 15 N values for H. curticephala were adjusted for trophic fractionation (isotopic difference between a consumer and their prey) using three different trophic enrichment factors (TEFs).…”
Section: Data Analysesmentioning
confidence: 99%
“…Assessing trophic relationships between hyperiid parasites and their host using gut content analysis is challenging due to the small size of hyperiids and their prey. According to Laval (1980), hyperiids may directly consume host tissues or their prey, depending on host life stage and changes in hyperiid density, a view supported by a recent study using stable isotopes (Fleming et al 2014). Therefore, assessment of trophic function should integrate this spatial-temporal variability in food sources for both parasitic hyperiids and their hosts.…”
“…Considering that pelagic phytoplankton, macroalgae and benthic microalgae are the main sources of primary production in this area (Reddin et al 2015) and the fact that C. plocamia (Ceh et al 2015) and hyperiid amphiods (Fleming et al 2014) may use benthic resources, samples of macroalgae, particulate organic matter (POM) and benthic algae/biofilm were collected from subtidal locations on the Mejillones peninsula adjacent to Mejillones Bay to include them as potential energy sources in our analysis. Epilithic biofilm was scraped from rocks using a metal spatula, a 5 l water sample was collected for POM, and fronds of the dominant brown alga (Lessonia nigrescens) were collected, with tissue taken from frond areas of recent growth.…”
Section: Sample Collectionmentioning
confidence: 99%
“…Benthic sources were included following a recent report of their contribution to Hyperia in a coastal system in the North-East Atlantic (Fleming et al 2014) as well as our interest in the potential shift in host habitat use with size. δ 13 C and δ 15 N values for H. curticephala were adjusted for trophic fractionation (isotopic difference between a consumer and their prey) using three different trophic enrichment factors (TEFs).…”
Section: Data Analysesmentioning
confidence: 99%
“…Assessing trophic relationships between hyperiid parasites and their host using gut content analysis is challenging due to the small size of hyperiids and their prey. According to Laval (1980), hyperiids may directly consume host tissues or their prey, depending on host life stage and changes in hyperiid density, a view supported by a recent study using stable isotopes (Fleming et al 2014). Therefore, assessment of trophic function should integrate this spatial-temporal variability in food sources for both parasitic hyperiids and their hosts.…”
“…Lynam & Brierley 2007, D Ambra et al 2014, Fleming et al 2014. Moreover, aside from specialised obligate gelativores such the leatherback turtle Dermochelys coriacea (Vandelli, 1761) (Brongersma 1969), growing evidence suggests that a vast array of taxa also consume gelatinous prey periodically (see reviews : Arai 2005, Ates 2017 (Hoving & Haddock 2017) and other gelatinous species (e.g.…”
This study presents new evidence of the extensive trophic role of gelatinous zooplankton by documenting typically nonmarine predators, mallard ducks, feeding on hydrozoans in shallow, coastal environments.
“…The study by D'Ambra and her colleagues joins a limited pool of isotopic studies that also show assimilation of jellyfish host tissues by of commensal crabs and amphipods (Towanda and Thuesen 2006;Fleming et al 2014). As such, the prevailing view that commensal taxa primarily use their hosts as habitat is clearly due for some rethought.…”
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