The energy density of jellyfish: Estimates from bomb-calorimetry and proximate-composition

Doyle, Thomas K.; Houghton, Jonathan D. R.; McDevitt, R. M.; Davenport, John; Hays, Graeme C.

doi:10.1016/j.jembe.2006.12.010

Cited by 187 publications

(198 citation statements)

References 31 publications

Supporting

Mentioning

166

Contrasting

Unclassified

Order By: Relevance

“…Previous studies (see Kaehler and Pakhomov 2001) have associated shifts in 13 C values following preservation, e.g., in EtOH with diVerential hydrolysis of 13 C-depleted lipids (DeNiro and Epstein 1977; Kiljunen et al 2006) leading to altered carbon isotope ratios following preservation. However, jellyWsh are lipid-poor (»1.2% by dry mass, Doyle et al 2007b), likely resulting in the lack of a preservation eVect on 13 C values.…”

Section: Discussionmentioning

confidence: 99%

“…Originally, we aimed to split each jellyWsh into three sections, and apply each treatment to each individual, allowing comparisons including individual responses to preservation. However, due to the high water content within the bell of jellyWsh (»95%; Doyle et al 2007b), small individuals did not provide adequate sample mass for replicate samples to be analysed. Our decision was also inXuenced by a wish to mimic procedures on research cruises as closely as possible, where individuals are typically preserved whole.…”

Section: Methodsmentioning

confidence: 99%

“…Unpreserved samples were transferred immediately to drying trays and placed into an oven to attain dry mass (see below for details). Other specimens were either transferred individually into labelled zip-lock bags and frozen at ¡20°C (frozen treatment) or preserved in 75% EtOH and stored at room temperature (EtOH treatment) for 6 months before oven drying using the method described by Doyle et al (2007b). Frozen and blotted dry EtOH samples were placed into pre-weighed aluminium containers, weighed and placed into a drying oven at a temperature of 60°C and dried to constant mass.…”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Preservation methods alter stable isotope values in gelatinous zooplankton: implications for interpreting trophic ecology

et al. 2011

View full text Add to dashboard Cite

JellyWsh are increasingly topical within studies of marine food webs. Stable isotope analysis represents a valuable technique to unravel the complex trophic role of these long-overlooked species. In other taxa, sample preservation has been shown to alter the isotopic values of species under consideration, potentially leading to misinterpretation of trophic ecology. To identify potential preservation eVects in jellyWsh, we collected Aurelia aurita from Strangford Lough (54 o 22Ј44.73ЉN, 5 o 32Ј53.44ЉW) during May 2009 and processed them using three diVerent methods prior to isotopic analysis (unpreserved, frozen and preserved in ethanol). A distinct preservation eVect was found on 15 N values: furthermore, preservation also inXuenced the positive allometric relationship between individual size and 15 N values. Conversely, 13 C values remained consistent between the three preservation methods, conXicting with previous Wndings for other invertebrate, Wsh and mammalian species. These Wndings have implications for incorporation of jellyWsh into marine food webs and remote sampling regimes where preservation of samples is unavoidable.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Preservation methods alter stable isotope values in gelatinous zooplankton: implications for interpreting trophic ecology

et al. 2011

View full text Add to dashboard Cite

show abstract

“…Despite the low calorific value of jellyfish [9], their high digestibility [15] may explain the adoption of this specialized diet by the leatherback turtle. In addition, this particular feeding strategy may be facilitated by the relatively low metabolic rate of this marine reptile [10,11] and the slow-moving nature of its prey (i.e.…”

Section: Discussionmentioning

confidence: 99%

Does prey size matter? Novel observations of feeding in the leatherback turtle ( Dermochelys coriacea ) allow a test of predator–prey size relationships

et al. 2011

Self Cite

View full text Add to dashboard Cite

Optimal foraging models predict that large predators should concentrate on large prey in order to maximize their net gain of energy intake. Here, we show that the largest species of sea turtle, Dermochelys coriacea, does not strictly adhere to this general pattern. Field observations combined with a theoretical model suggest that a 300 kg leatherback turtle would meet its energetic requirements by feeding for 3-4 h a day on 4 g jellyfish, but only if prey were aggregated in high-density patches. Therefore, prey abundance rather than prey size may, in some cases, be the overriding parameter for foraging leatherbacks. This is a classic example where the presence of small prey in the diet of a large marine predator may reflect profitable foraging decisions if the relatively low energy intake per small individual prey is offset by high encounter rates and minimal capture and handling costs. This study provides, to our knowledge, the first quantitative estimates of intake rate for this species.

show abstract

“…mastigophora have a water content on 95.8% which is almost identical to other species studied (Doyle et al, 2007). Dead jellyfish decay quickly (2-3 days) on tropical beaches (personal observations, see ESM Table 1) meaning that the organic carbon and nitrogen in their bodies indirectly derived from primary and secondary production offshore are made available in the nearshore coastal zone.…”

Section: Distribution and Occurrence Of Swarmsmentioning

confidence: 53%

Role of winds and tides in timing of beach strandings, occurrence, and significance of swarms of the jellyfish Crambione mastigophora Mass 1903 (Scyphozoa: Rhizostomeae: Catostylidae) in north-western Australia

et al. 2015

View full text Add to dashboard Cite

Very large swarms of the red jellyfish Crambione mastigophora in north-western Australia disrupt swimming on tourist beaches causing economic impacts. In October 2012, jellyfish stranding on Cable Beach (density 2.20 ± 0.43 ind. m -2 ) was estimated at 52.8 million individuals or 14,172 t wet weight along 15 km of beach. Reports of strandings after this period and up to 250 km south of this location indicate even larger swarm biomass. Strandings of jellyfish were significantly associated with a 2-day lag in conditions of small tidal ranges (\5 m). More than 90% of strandings occurred 2 days after winds were blowing onshore, but with the small number of days when satellite wind data were available during the study period, this result was not statistically significant. Dedicated instrument measurements of meteorological parameters, rather than the indirect measures used in this study (satellite winds and modelled currents) may improve the predictability of such events and help authorities to plan for and manage swimming activity on beaches. We also show a high incidence of predation by C. mastigophora on bivalve larvae which may have a significant impact on the reproductive output of pearl oyster broodstock in the region.

show abstract

The energy density of jellyfish: Estimates from bomb-calorimetry and proximate-composition

Cited by 187 publications

References 31 publications

Preservation methods alter stable isotope values in gelatinous zooplankton: implications for interpreting trophic ecology

Preservation methods alter stable isotope values in gelatinous zooplankton: implications for interpreting trophic ecology

Does prey size matter? Novel observations of feeding in the leatherback turtle ( Dermochelys coriacea ) allow a test of predator–prey size relationships

Role of winds and tides in timing of beach strandings, occurrence, and significance of swarms of the jellyfish Crambione mastigophora Mass 1903 (Scyphozoa: Rhizostomeae: Catostylidae) in north-western Australia

Contact Info

Product

Resources

About