Feeding and Growth of the Red King Crab Paralithodes Camtschaticus Under Laboratory Conditions

Zhou, Shijie; Shirley, Thomas C.; Kruse, Gordon H.

doi:10.2307/1549328

Cited by 36 publications

(23 citation statements)

References 11 publications

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“…Despite this, there are hints that a condition of determinate growth could have evolved from an ancestral pattern of indeterminate growth by distinct mechanisms in related species. Like lobsters, some crabs, such as Cancer magister (the Dungeness crab) and Paralithodes camtschaticus (the red king crab), show indeterminate growth and continue to molt throughout their lives (Wainwright and Armstrong 1993;Zhou et al 1998), whereas others stop molting when they reach sexual maturity. Remarkably, in two species of crabs that show determinate growth, the shore crab Carnicus maenas and the spider crab, Acanthonyx lunulatus, the cessation of molting occurs for different reasons.…”

Section: Growth Patterns In Arthropodsmentioning

confidence: 99%

Indeterminate Growth: Could It Represent the Ancestral Condition?

Hariharan

Wake

2015

Cold Spring Harb Perspect Biol

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Section: Growth Patterns In Arthropodsmentioning

confidence: 99%

Indeterminate Growth: Could It Represent the Ancestral Condition?

Hariharan

Wake

2015

Cold Spring Harb Perspect Biol

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“…The king crabs were transported to the experimental tanks and deprived of food for two days to initiate immediate response (Zhou et al, 1998). The experimental tanks were made up of three 4 m 2 , squared PVC tanks, with flat bottoms divided into two sections by netting (20 · 20 mm mesh size).…”

Section: Experimental Designmentioning

confidence: 99%

Impact scenario for the invasive red king crab Paralithodes camtschaticus (Tilesius, 1815) (Reptantia, Lithodidae) on Norwegian, native, epibenthic prey

Jørgensen

Primicerio

2007

Hydrobiologia

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Large invasive predators like the king crab, Paralithodes camtschaticus, deserve particular attention due to their potential for catastrophic ecological impact on recipient communities. Conspicuous, epibenthic prey species, such as the slow growing commercial scallop Chlamys islandica, are particularly exposed to the risk of local extinction. A research program integrating experiments and field monitoring is attempting to predict and track the impact of invasive king crab on scallop beds and associated fauna along the north Norwegian coast. The claw gape of the crab shows no limitations in handling the flat-bodied scallop. However, the potential impact of the crab on scallop may depend on the availability of other calcified prey associated with scallop beds, such as the sea star, sea urchin, and blue mussel, all species recorded in the diet of P. camtschaticus. To address this issue, a laboratory experiment on foraging behaviour of P. camtschaticus was conducted. The experimental results show that all size classes of red king crab prefer scallops, but small juveniles and medium sized crabs demonstrate active selection for starfish (Asterias rubens) that equals or surpasses the electivity of the large crab. The selection of sea urchin (Strongylocentrotus droebachiensis) and blue mussel (Mytilus edulis) is slightly positive or neutral for the three crab size classes. These results suggest that scallop beds with a rich associated fauna are less vulnerable to red king crabs predation and possibly more resilient than beds with few associated species. Also, crab size distribution is likely relevant for invasion impact, with increasing abundance of small and medium sized crabs being detrimental for alternative calcified prey associated with scallop beds. Successive stages of crab invasion will see an acceleration of scallop mortality rates associated with (i) decreasing availability of alternative prey, due to protracted predation pressure intensified by recruitment of juvenile crabs, and (ii) increased number of large crabs. Estimates of crab density and intake rates suggest that the accelerated loss rates will eventually endanger scallop beds persistence.

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“…The red king crab were transported to the experimental tanks and deprived of food for 2 days to initiate immediate response (Zhou et al 1998). The experimental tanks were made up of three 4 m 2 squared PVC tanks with flat bottoms divided into two sections by netting (20 · 20 mm mesh size) which gives three independent treatment enclosures of 2 m 2 with a set of two nested replicates in each treatment enclosure.…”

Section: Experimental Designmentioning

confidence: 99%

“…Red king crabs feed most intensively in late spring, probably to replace energy recently expended during molting and mating (Jewett and Feder 1982). However, laboratory studies show that the crab completely stopped feeding during ecdysis and fed at lower rate before and after ecdysis with no sign of compensatory feeding (Zhou et al 1998). …”

Section: Introductionmentioning

confidence: 99%

Impact Scenario for an Introduced Decapod on Arctic Epibenthic Communities

Jørgensen¹

2005

Biol Invasions

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The intentional introduction of a species for the enhancement of stock or establishment of new fisheries, often has unforeseen effects. The red king crabs, Paralithodes camtschaticus, which was introduced into the Barents Sea by Russian scientists, has established a self-sustaining population that has expanded into Norwegian waters. As top benthic predators, the introduced red king crabs may have possible effects upon native epifaunal scallop (Chlamys islandica) communities. These benthic communities may be a source of prey species in late spring, when the red king crabs feed most intensively. Foraging rates (consumption, killing or severely damaging) of red king crab on native prey organisms were measured by factorial manipulation of crab density (0.5, 1.5 and 3 per m 2 ), size classes (immature, small mature, and large mature crabs), and by evaluating prey consumption after 48 h, in order to extrapolate a scenario of the likely impacts. Foraging rates of the red king crab on scallops ranged between 150 and 335 g per m 2 within 48 h. These rates did not change when crab density was altered, though an increased amount of crushed scallops left uneaten at the tank floor, were correlated with high density of small mature crabs. Foraging rate changed significantly with crab size. Consequently, the susceptibility of native, shallow water epibenthic communities to red king crab predation in the early life history stages, and during the post-mating/molting spring period, must be considered significant when foraging rates are contrasted with natural scallop biomass between 400 and 1200 g scallops per m 2 .

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Feeding and Growth of the Red King Crab Paralithodes Camtschaticus Under Laboratory Conditions

Cited by 36 publications

References 11 publications

Indeterminate Growth: Could It Represent the Ancestral Condition?

Indeterminate Growth: Could It Represent the Ancestral Condition?

Impact scenario for the invasive red king crab Paralithodes camtschaticus (Tilesius, 1815) (Reptantia, Lithodidae) on Norwegian, native, epibenthic prey

Impact Scenario for an Introduced Decapod on Arctic Epibenthic Communities

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