Effects of feeding regime on growth rate in the Mediterranean Sea anemone Actinia equina (Linnaeus)

Chomsky, O.; Kamenir, Yury; Hyams, M.; Dubinsky, Zvy; Chadwick-Furman, Nanette E.

doi:10.1016/j.jembe.2003.09.009

Cited by 19 publications

(12 citation statements)

References 34 publications

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“…station = chav 3). Finally, these anemones grow more rapidly when fed at least once per week than when starved (O'Reilly 2015), as known for other sea anemones (reviewed in Chomsky et al 2004b). We conclude that these anemones appear to grow most rapidly under conditions of low water flow, low tropical to subtropical seawater temperatures, and ample food supply.…”

Section: Body Growth and Shrinkagesupporting

confidence: 50%

Population dynamics of corkscrew sea anemones Bartholomea annulata in the Florida Keys

O’Reilly¹,

Chadwick²

2017

Mar. Ecol. Prog. Ser.

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Corkscrew sea anemones Bartholomea annulata are important ecologically as hubs of a mutualistic network involving cleaner shrimps and client fishes on Caribbean reefs. They also are collected for the ornamental aquarium trade, but little is known about their population dynamics to support conservation management. We quantified variation in population structure among regions of the Florida Keys and levels of human impact within region. The Upper Keys and lowimpact sites supported higher population abundance and proportions of small anemones than the Lower Keys and high-impact sites. At 2 sites where we monitored anemone dynamics every 2 mo for 1 yr, individuals recruited frequently and grew rapidly to maximum body size and then remained static or shrank. Fewer than half the individuals survived all year, indicating rapid population turnover, with mortality occurring mostly among small individuals or large ones that appeared to senesce beforehand. Stasis of large individuals (or lack thereof) exerted the most influence on population size. We conclude that in Florida, corkscrew anemones experience relatively high recruitment and survival at sites with low human impact and in the Upper Keys, where summer water temperatures are cooler than in the Lower Keys. Populations are highly dynamic and appear to rely on frequent recruitment, potentially linked to the presence of resident adults at high enough abundances for fertilization of broadcast propagules. The ephemeral nature of these anemones has important implications for the dynamics of their anemoneshrimp symbionts, for reef fishes that utilize them as parasite cleaning stations, and for the conservation management of their populations.

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Section: Body Growth and Shrinkagesupporting

confidence: 50%

Population dynamics of corkscrew sea anemones Bartholomea annulata in the Florida Keys

O’Reilly¹,

Chadwick²

2017

Mar. Ecol. Prog. Ser.

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“…Large sea anemones contribute relatively high fecundity and potential future recruits compared with small ones (Dunn 1977;Jennison 1981;Sebens 1981;Hunter 1984;Bucklin 1987). In addition to producing greater gamete output than smaller individuals (Chadwick-Furman et al 2000b;Birkeland and Dayton 2005), large anemones exhibit low probabilities of mortality relative to small ones (O'Reilly and Chadwick 2017). Consequently, the relatively low mortality and high fecundity of large host anemones allows them to create a 'storage effect' in which fecund, long-lived individuals may buffer populations during periods of low recruitment (Warner and Chesson 1985).…”

Section: Discussionmentioning

confidence: 99%

“…after Chadwick and Arvedlund (2005), Hattori (2006) and . The TCSA was used because it correlates significantly with wet mass and other measures of body size in sea anemones (Chadwick-Furman and Spiegel 2000;Chomsky et al 2004;McVay 2015), and was the only size parameter that could be measured non-intrusively in the field for these two anemone species, which attach their bases deep into reef holes (Fautin and Allen 1997). Notes also were made on individual markings (tentacle striations, body colour, column vesicles) to confirm identification during subsequent surveys.…”

Section: Study Site and Field Surveysmentioning

confidence: 99%

Demographic modelling of giant sea anemones: population stability and effects of mutualistic anemonefish in the Jordanian Red Sea

Dixon

McVay

Chadwick

2017

Mar. Freshwater Res.

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Giant sea anemones serve as important hosts for mutualistic anemonefish on Indo-Pacific coral reefs, but their population dynamics and turnover rates remain largely unknown. We used size-based demographic models to determine recruitment, changes in body size and mortality of bulb-tentacle anemones Entacmaea quadricolor and leathery anemones Heteractis crispa over 2years on coral reefs in the northern Red Sea, Jordan. Individuals recruited at consistent rates and grew rapidly until they reached ~300-cm2 tentacle crown surface area, then mostly remained static or shrank. Mortality rate decreased with body size, and the retention of large individuals strongly influenced population size. Individuals of H. crispa were more dynamic than those of E. quadricolor, possibly due to their hosting significantly smaller anemonefish. Both populations were abundant and stable but dynamic in terms of individuals, with estimated turnover times of only ~5 and 3years for E. quadricolor and H. crispa respectively. We conclude that some giant anemones may be short lived relative to their fish symbionts, and that stasis rates of large individuals disproportionately affect their populations. These results have implications for conservation management strategies of these major cnidarians on coral reefs, and indicate wide variation between species in the population-level effects of mutualistic interactions.

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“…Here include lethal compounds for the purpose of hunting and defending (Fish & Fish, 1996). Although sea anemones (A. equina L., 1758) occur in the rocky intertidal zone (Gadelha et al, 2013), it can also live in subtidal areas up to 20 m. (Fish & Fish, 1996;Chomsky et al, 2004b). In Israel, polyps of A. equina usually occur at the mid-tide level, in shaded positions under ledges or in caves, but sometimes also are found in unshaded rock pools (Chomsky et al, 2004b).…”

Section: Introductionmentioning

confidence: 99%

Seasonal Changes in the Chemical Composition of the Beadlet Anemones (Actinia equina) from Mersin Bay, Northeastern Mediterranean coast of Turkey

Yatkin¹,

Ayas

Köşker³

et al. 2017

Natural and Engineering Sciences

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In this study, the effects of seasonal variation in proximate composition and fatty acid profile as a component of chemical compositions of Mediterranean Sea anemone species (Actinia equina L.,1758) living in Mersin Bay were investigated. Chemical composition analysis of anemone samples showed that while the highest levels of protein and water were obtained in winter, the highest lipid and total mineral substance (TMS) levels were obtained in autumn. In terms of fatty acid analysis, during all four seasons the dominant saturated fatty acids (SFA) were palmitic (C16:0) and stearic acids (C18:0), the dominant monounsaturated fatty acids (MUFA) were oleic (C18:1n9) and vaccenic acids (C18:1n7) and the dominant polyunsaturated fatty acids (PUFA) were linoleic acids (C18:2n6), linolenic acid (C18:3n3), gamma linolenic acid (C18:3n6), arachidonic acid (C20:4n6), eicosapentaenoic acid (EPA, 20:5n3) and docosahexaenoic acid (DHA, C22:6n3) for A. equina. The highest values of gamma linolenic acid, EPA and DHA levels were obtained in autumn as 0.44%, 14.83% and 14.10%, respectively.

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Effects of feeding regime on growth rate in the Mediterranean Sea anemone Actinia equina (Linnaeus)

Cited by 19 publications

References 34 publications

Population dynamics of corkscrew sea anemones Bartholomea annulata in the Florida Keys

Population dynamics of corkscrew sea anemones Bartholomea annulata in the Florida Keys

Demographic modelling of giant sea anemones: population stability and effects of mutualistic anemonefish in the Jordanian Red Sea

Seasonal Changes in the Chemical Composition of the Beadlet Anemones (Actinia equina) from Mersin Bay, Northeastern Mediterranean coast of Turkey

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