LEARNING AS A FACTOR IN DIET SELECTION BY <i>ELYSIA VIRIDIS</i> (MONTAGU) (OPISTHOBRANCHIA).

Jensen, Kathe R.

doi:10.1093/mollus/55.1.79

Cited by 29 publications

(38 citation statements)

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“…Radular mounts were prepared as described previously Jensen & Wells, 1990). A few radulae of voucher specimens preserved after laboratory experiments involving dietary transfer from Codium to Chaetomorpha or the other way around (see Jensen, 1989) were also examined.…”

Section: Methodsmentioning

confidence: 99%

“…Also, the tips are often blunt. Teeth from a specimen which had been collected on Chaetomorpha and transferred to Codium in the laboratory (see Jensen, 1989 for experimental set-up) are indistinguishable from teeth of animals collected and feeding on Chaetomorpha (Fig. 2D, E).…”

Section: Plasticity Of Radular Teethmentioning

confidence: 98%

“…2D, E). Teeth from animals which had been collected on Codium and transferred to Chaetomorpha in the laboratory (Jensen, 1989) have slightly curved tips and prominent lateral flanges, but the tips are usually blunt. The curvature of the tips is much less than in animals collected and feeding on Codium (Fig.…”

Section: Plasticity Of Radular Teethmentioning

confidence: 99%

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Morphological adaptations and plasticity of radular teeth of the Sacoglossa (= Ascoglossa) (Mollusca: Opisthobranchia) in relation to their food plants

Jensen

1993

Biological Journal of the Linnean Society

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The radular teeth of 55 species of Sacoglossa (= Ascoglossa) (Mollusca: Opisthobranchia) with known diets are classified into three basic groups: triangular, blade‐shaped and sabot‐shaped. Cell wall composition of the food plant is the single most important factor influencing radular morphology. The algae eaten by sacoglossans have either xylan, mannan or cellulose as their structural wall component. Sabot‐shaped teeth are associated with diets of Siphonocladales and Cladophorales, which have cellulose cell walls of a ‘crossed fibrillar texture’. Triangular teeth with lateral denticles are associated with diets of Caulerpa or with calcified algae. Most of these have xylan as the major structural polysaccharide. Blade‐shaped teeth occur in a large number of species representing a wide variety of diets. It is proposed that the three types of teeth function in different manners. Tooth denticulation is correlated with functional group of the food plant. The radular teeth of Elysia viridis feeding on Codium are longer, wider and have more curved tips than teeth of E. viridis feeding on Chaetomorpha. The teeth of E. viridis transferred from Codium to Chaelomorpha in the laboratory change in shape as well as size.

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Section: Methodsmentioning

confidence: 99%

Section: Plasticity Of Radular Teethmentioning

confidence: 98%

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Morphological adaptations and plasticity of radular teeth of the Sacoglossa (= Ascoglossa) (Mollusca: Opisthobranchia) in relation to their food plants

Jensen

1993

Biological Journal of the Linnean Society

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“…However, information on feeding specificity in sacoglossans is predominantly restricted to host associations and sacoglossan traits, such as feeding morphology and sequestration of functional chloroplasts (Clark & Busacca 1978, Jensen 1983, Thibaut et al 2001, Gianguzza et al 2002. Post-settlement behavioural responses of sacoglossans (such as diet preferences) have been less frequently described (Jensen 1989, Trowbridge & Todd 2001, Gianguzza et al 2002, Trowbridge et al 2009, with no demonstrable links between host chemical defences and sacoglossan associations or densities. These links should be complementary considerations in the evolution of specialisation (Futuyma & Moreno 1988).…”

Section: Open Pen Access Ccessmentioning

confidence: 99%

Feeding preferences and host associations of specialist marine herbivores align with quantitative variation in seaweed secondary metabolites

Baumgartner¹,

Motti²,

Nys³

et al. 2009

Mar. Ecol. Prog. Ser.

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“…(Trowbridge 1989(Trowbridge , 1991a(Trowbridge , 1992. Individual sea slugs often specialize on one host species and have Limited capacity to survive on other CO-occurring host species (Jensen 1989, Trowbridge 1991a. Thus, Placida popul a t i o n~ are functionally subdivided on different host species, and the slug's dynamics on one species may be largely independent of its dynamics on other local host species.…”

Section: Sea Slug and Algal Natural Historymentioning

confidence: 99%

Mesoherbivory: the ascoglossan sea slug Placida dendritica may contribute to the restricted distribution of its algal host

Trowbridge¹

1992

Mar. Ecol. Prog. Ser.

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The influence of small herbivores in marine rocky intertidal communities has been largely ignored. From 1985 to 1990, I investigated the association of the oligophagous ascoglossan (=sacoglos-San) sea slug Placida dendn'tica (Gastropoda: Opisthobranchia) with one of its algal food species, the crustose green alga Codium setchellii, along the central coast of Oregon, USA. The alga has a restricted local distribution. shaded rocky surfaces in low intertidal areas strongly influenced by sand scour and burial. During spring and summer, P. dendn'tica occurred on 6 to 32 % of C. setchellii thalli at 3 low intertidal sites, mean densities were 7 to 12 sea slugs per occupied thallus The sea slug composed a major, often numerically dominant, component of the herbivore fauna on the alga in spring and summer whereas the small snail Lacuna marmorata numencally dominated in fall and winter. Sea slugs damaged the alga more frequently and consumed it more rapidly than did CO-occurring, generalist herbivores (e.g. snails, gammarid amphipods, idoteid isopods). The alga had a small-size refuge from the sea slug but not a low-density refuge: recruiting larvae were extremely effective at locating all transplants, even at low densities. Sea slugs often attacked damaged algal hosts more frequently than undamaged hosts. Because C. setchellii was more tolerant of physical disturbance than was P. dendritica, the alga had partial refuges from sea slugs in areas with high sand or wave disturbance. Under conditions of low sand movement and low wave force, sea slug herbivory may exclude the alga from low intertidal, rocky sites along the Oregon coast. The restricted distribution of C. setchellii, therefore, may reflect spatial variation in effects of disturbance on sea slug recruitment and herbivory.

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LEARNING AS A FACTOR IN DIET SELECTION BY ELYSIA VIRIDIS (MONTAGU) (OPISTHOBRANCHIA).

Cited by 29 publications

References 0 publications

Morphological adaptations and plasticity of radular teeth of the Sacoglossa (= Ascoglossa) (Mollusca: Opisthobranchia) in relation to their food plants

Morphological adaptations and plasticity of radular teeth of the Sacoglossa (= Ascoglossa) (Mollusca: Opisthobranchia) in relation to their food plants

Feeding preferences and host associations of specialist marine herbivores align with quantitative variation in seaweed secondary metabolites

Mesoherbivory: the ascoglossan sea slug Placida dendritica may contribute to the restricted distribution of its algal host

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