Autotomy reduces feeding, energy storage and growth of the sea star Stichaster striatus

Díaz-Guisado, Daniela; Gaymer, Carlos F.; Brokordt, Katherina; Lawrence, John M.

doi:10.1016/j.jembe.2006.06.037

Cited by 33 publications

(22 citation statements)

References 34 publications

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“…Although it has been surmised that tail loss in juveniles may have little cost other than the temporary loss of the ability to autotomize (Dial and Fitzpatrick, 1981), it is evident that, for leopard geckos at least, considerable stored fat may be lost through this process, even at very young ages (Lynn et al, 2013). In juveniles of this species, the energetic cost of regeneration is considerable, and regrowth following maximal autotomy is accelerated at the expense of normal body growth (snout-vent length and mass) (Lynn et al, 2013), the tail displaying compensatory regeneration (the preferential regrowth of a lost structure at the expense of overall growth: Diaz-Guisado et al, 2006;Barría and González, 2008;Lynn et al, 2013). Even in the face of reduced food availability and intake, juvenile leopard geckos of both sexes preferentially divert energy so that the regenerating tail grows at a substantially faster rate than the tail of their original-tailed counterparts (Lynn et al, 2013).…”

Section: Q2mentioning

confidence: 99%

The regenerated tail of juvenile leopard geckos (Gekkota: Eublepharidae: Eublepharis macularius) preferentially stores more fat than the original

Russell

Lynn

Cottle

2015

Zoology

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Section: Q2mentioning

confidence: 99%

The regenerated tail of juvenile leopard geckos (Gekkota: Eublepharidae: Eublepharis macularius) preferentially stores more fat than the original

Russell

Lynn

Cottle

2015

Zoology

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“…The loss of an arm of a sea star (Diaz-Guisado et al 2006) impacts the effectiveness of feeding. Intact individuals grew more rapidly than did autotomized ones, and those individuals that had suffered autotomy directed energy preferentially to regrowth of the lost arm over that dedicated to body growth, bringing about accelerated reestablishment of feeding effectiveness (Diaz-Guisado et al 2006). In contrast, the chelipeds of porcelain crabs are not employed in foraging but are indicative of social status and effectiveness in mating (Barría and González 2008).…”

Section: Discussionmentioning

confidence: 99%

Relative Apportioning of Resources to the Body and Regenerating Tail in Juvenile Leopard Geckos (Eublepharis macularius) Maintained on Different Dietary Rations

Lynn

Borkovic²,

Russell³

2013

Physiological and Biochemical Zoology

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Caudal autotomy is a widespread phenomenon among lizards, and similar processes occur in other groups of vertebrates and invertebrates. Many costs have been associated with autotomy, including the regeneration of lost biomass. For lizards, it is not known whether resources are preferentially directed toward caudal regeneration or whether regeneration occurs only when resources are abundant. Conflicting information is present in the literature, and an absence of controlled experiments prevents determination of what pattern of regeneration may occur under a given set of circumstances. We employed the leopard gecko, a fat-tailed species, to examine whether tail regeneration is a priority and, if so, whether it remains so when resources become limiting. We explored this through caudal autotomy and dietary manipulation under conditions that ensured that differences in diet were sufficient to permit differential growth. We examined juvenile leopard geckos because these animals are rapidly growing and allocation of energy is not compromised by reproductive investment. The effects of dietary resource availability and the demands of caudal regeneration were compared in intact and regenerating animals. Our evidence indicates that caudal regeneration is a priority, even when resources are limiting. We conclude that tail regrowth is a priority that is associated with long-term survival and possibly reproductive success.

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“…Nevertheless, sublethal predation (i.e. loss of arms) could have a considerable impact, as it may lead to decreases in mobility and feeding, and consequently reduced energy storage and growth (Lawrence & Vásquez 1996, Díaz-Guisado et al 2006, Naya & Bozinovic 2006. Although sublethal predation clearly leads to decreased fitness in many species (see Maginnis 2006), it is rarely incorporated into predator-prey models (for an exception see Zajac 1995 Maginnis 2006).…”

Section: Discussionmentioning

confidence: 99%

A keystone predatory sea star in the intertidal zone is controlled by a higher-order predatory sea star in the subtidal zone

Gaymer

Himmelman²

2008

Mar. Ecol. Prog. Ser.

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The impact of keystone predators may be affected by physical conditions and interactions with other predators. We evaluated the impact of the sea star Meyenaster gelatinosus on another sea star, Heliaster helianthus, which was previously described as a keystone predator along the coast of central Chile. Field surveys showed that H. helianthus is a common prey of M. gelatinosus. H. helianthus occurred across the subtidal zone at locations with few M. gelatinosus, but was largely restricted to the intertidal and upper-subtidal zones at locations where M. gelatinosus was abundant. The proportion of H. helianthus feeding decreased with increasing M. gelatinosus abundance, and H. helianthus with autotomized arms, mainly the result of sublethal attacks by M. gelatinosus, increased with increasing M. gelatinosus abundance. Additions of M. gelatinosus to a sediment bottom area where H. helianthus was actively feeding on the gastropod Turritella cingulata provoked (1) reduced feeding and (2) a strong escape response in which H. helianthus took the 'crown' position (arm tips raised) in about 40 s and then fled. T. cingulata is an abundant prey resource that is likely only available to H. helianthus when M. gelatinosus is rare. The predatory role of H. helianthus is greatly reduced when M. gelatinosus is common. Our observations suggest that M. gelatinosus, rather than H. helianthus or the whelk Concholepas concholepas, is the keystone predator in subtidal communities. Our study demonstrates that the role of a keystone predator (in our case H. helianthus in the intertidal zone) can change in an adjacent habitat (the subtidal zone) due to interactions with other predators.

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Autotomy reduces feeding, energy storage and growth of the sea star Stichaster striatus

Cited by 33 publications

References 34 publications

The regenerated tail of juvenile leopard geckos (Gekkota: Eublepharidae: Eublepharis macularius) preferentially stores more fat than the original

The regenerated tail of juvenile leopard geckos (Gekkota: Eublepharidae: Eublepharis macularius) preferentially stores more fat than the original

Relative Apportioning of Resources to the Body and Regenerating Tail in Juvenile Leopard Geckos (Eublepharis macularius) Maintained on Different Dietary Rations

A keystone predatory sea star in the intertidal zone is controlled by a higher-order predatory sea star in the subtidal zone

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