On the introduction of the Kamchatka King crab Paralithodes camtschatica (Decapoda: Anomura: Lithodidae) into the Barents Sea

Orlov, Yu.I.; Ivanov, B.G.

doi:10.1007/bf00391642

Cited by 105 publications

(57 citation statements)

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“…In 1974, a first berried female was found; by 1976, there were at least 100 records, and the introduction was considered a success (Orlov & Ivanov 1978). This population is now believed to be actively invading coastal waters through migration of mature crabs and passive dispersal of larvae (Pedersen et al 2006).…”

Section: Decapod Introductions and Invasionsmentioning

confidence: 99%

Ecological role of large benthic decapods in marine ecosystems: a review

Boudreau¹,

Worm²

2012

Mar. Ecol. Prog. Ser.

128

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Large benthic decapods play an increasingly important role in commercial fisheries worldwide, yet their roles in the marine ecosystem are less well understood. A synthesis of existing evidence for 4 infraorders of large benthic marine decapods, Brachyura (true crabs), Anomura (king crabs), Astacidea (clawed lobsters) and Achelata (clawless lobsters), is presented here to gain insight into their ecological roles and possible ecosystem effects of decapod fisheries. The reviewed species are prey items for a wide range of invertebrates and vertebrates. They are omnivorous but prefer molluscs and crustaceans as prey. Experimental studies have shown that decapods influence the structuring of benthic habitat, occasionally playing a keystone role by suppressing herbivores or space competitors. Indirectly, via trophic cascades, they can contribute to the maintenance of kelp forest, marsh grass, and algal turf habitats. Changes in the abundance of their predators can strongly affect decapod population trends. Commonly documented nonconsumptive interactions include interference-competition for food or shelter, as well as habitat provision for other invertebrates. Anthropogenic factors such as exploitation, the creation of protected areas, and species introductions influence these ecosystem roles by decreasing or increasing decapod densities, often with measurable effects on prey communities. Many studies have investigated particular ecosystem effects of decapods, but few species were comprehensively studied in an ecosystem context. A simplified synthetic framework for interpreting eco system roles of decapods was derived from the available evidence; however, more experimental and long-term observational studies are needed to elucidate mechanisms and shed light on the longterm consequences of decapod fisheries.

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Section: Decapod Introductions and Invasionsmentioning

confidence: 99%

Ecological role of large benthic decapods in marine ecosystems: a review

Boudreau¹,

Worm²

2012

Mar. Ecol. Prog. Ser.

128

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“…Research into this decapod family in recent years has been driven by a steep increase in the discovery rate of new species (Macpherson, 2004;Spiridonov et al, 2006;Hall and Thatje, 2009a,b), the potential for opening new fisheries (López-Abellán and Balguerías, 1994; Watters, 1997;Collins et al, 2002;Purves et al, 2003), as well as biogeographic range shifts, either as introduced species and/or in response to climate warming (Orlov and Ivanov, 1978;Jorgensen et al, 2005;Thatje et al, 2005a;Aronson et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Energetic changes throughout lecithotrophic larval development in the deep-sea lithodid crab Paralomis spinosissima from the Southern Ocean

Thatje

Mestre

2010

Journal of Experimental Marine Biology and Ecology

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Adult populations of the lithodid crab Paralomis spinosissima thrive at the lower temperature boundary of about 1°C for the Lithodidae, and are endemic to deep waters off South Georgia, Southern Ocean. Here, we present evidence for lecithotrophic development throughout the early ontogeny of this species over a period of 14 months. At constant 5°C (± 0.5), development of the Zoea I and II, the megalopa, and the crab I instar lasted about 12, 24, 108, and 290 days, respectively. Successful development and moult at lower temperatures could not be observed. Changes in biomass and elemental composition (W, C, and N) were studied throughout larval and early megalopa development. Initial biomass was about twice as high as in lecithotrophic larval developments previously reported for subantarctic lithodids, and only a minimal shift (9.2 to 8.9) in C:N mass ratio was observed from the Zoea I to the megalopa stage; at the same time an even decrease of both C and N indicated no bias toward the depletion of lipids. Very thin exuviae cast at moult support the view of energy-saving adaptations throughout larval development. The cost of higher maternal investment into single offspring and the lack of evidence for successful larval development at temperatures typical of Southern Ocean deep waters, pose questions with regard to the frequency of successful recruitment events of lithodid crabs at their lower physiological temperature tolerance. Significant intraspecific variability in larval energetic fitness at hatching between females, suggesting variability in offspring fitness, may additionally constrain on offspring survival.

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“…This should be rather unsurprising, since introductions that have net benefits to at least some stakeholders are likely to be directly undertaken by humans rather than left for more random chance opportunities for a species to hitchhike to a new environment. The Red King Crab introduction into the Barents Sea by Russia is an example of just such an intentional introduction made for market benefits (Orlov and Ivanov, 1978) (see Sundet, Chapter 5 in this volume).…”

Section: Effects Of the Age Of Pacific Explorationmentioning

confidence: 99%