First record of the alien caprellid amphipod, Caprella mutica, for the UK

Ehime University, Matuyama, Ehime, Japan
Journal of the Marine Biological Association of the UK (Impact Factor: 1.06). 09/2004; 84(05):1027 - 1028. DOI: 10.1017/S0025315404010355h


A large caprellid amphipod recently discovered at a salmon farm in the Lynne of Lorne near Oban, Scotland, has been identified as Caprella
mutica, a species indigenous to north-east Asia. The caprellid population appears to have become established in the last four years at the site with a high abundance of animals occurring year round on the farm nets, mooring ropes and on artificial experimental structures located <10 m from the fish farm. This paper briefly describes C.
mutica found in Scotland. Application of Chapman & Carlton's criteria for determining introduced species suggests that C.
mutica is non-indigenous to the area.

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Available from: Elizabeth J Cook, Sep 17, 2014
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    • "Ciona is a notorious invasive species that has highly impacted aquaculture in PEI (and elsewhere in the world (Millar 1958; Kang et al. 1978; Uribe and Etchepare 1999; Tan et al. 2002) and has been a focus of management effort since its arrival there in 2004 (Locke et al. 2007). C. mutica is less problematic, and in spite of its global success as an invasive species (Willis et al. 2004; Bushbaum and Gutow 2005; Ashton et al. 2007; Locke et al. 2007), it has received little attention, both in PEI [where it was first noted in 1997 (Locke et al. 2007)] and elsewhere. Before our study, little was known about the predatory potential of C. mutica, and although it was suspected to be important (Epelbaum et al. 2009), only very recent work has confirmed that they are able to feed on tunicate larvae in the laboratory (Rius et al. in press). "
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    ABSTRACT: As the number of introductions of non-indigenous species (NIS) continues to rise, ecologists are faced with new and unique opportunities to observe interactions between species that do not naturally co-exist. These interactions can have important implications on the invasion process, potentially determining whether NIS become widespread and abundant, survive in small numbers, or fail to establish and disappear. Although many studies have naturally focused on the interactions between NIS and native species to examine their effects and the biological resistance of the recipient community to invasion, few have examined the effects that NIS have on each other. In some cases, interactions can facilitate the invasion process of one or both species (i.e., “invasional meltdowns”), but competition or predation can lead to negative interactions as well. The introduction of the vase tunicate, Ciona intestinalis, in Prince Edward Island (Canada) has harmed mussel aquaculture via heavy biofouling of equipment and mussels. Through both a broad-scale survey and small-scale field experiments, we show that Ciona recruitment is drastically reduced by caprellid amphipods, including the NIS Caprella mutica. This study provides an exciting example of how established invasive species can negatively impact the recruitment of a secondary invader, highlighting the potential for non-additive effects of multiple invasions.
    Full-text · Article · Oct 2014 · Biological Invasions
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    • "Similar to other alien caprellids in Europe such as Caprella mutica in Scotland (Willis et al. 2004), the non-indigenous Table 3 Reproductive traits for non-indigenous caprellid populations collected at Mallorca in November 2011 Species Mean ovigerous female size (mm) ± SE Mean brood size (no. eggs/female) ± SE "
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    ABSTRACT: Paracaprella pusilla Mayer (Fauna und Flora des Golfes von Neapel 17:1–55, 1890), originally described from Brazil, is one of the most abundant caprellid amphipod species in tropical and subtropical seas around the world. During a survey of caprellid amphipods from marinas along the Balearic Island (Western Mediterranean Sea) carried out between November 2011 and August 2012, we found two established populations of P. pusilla in Mallorca and Ibiza, respectively. So far, its occurrence in European waters was reported only from southwestern Spain in 2010. This record represents a northward range expansion of the species’ distribution, which is found for the first time in the Mediterranean. This is also the first record of the genus Paracaprella in the Mediterranean Sea. The most probable introduction vector was ship fouling. We also found the invasive caprellid Caprella scaura Templeton (Trans Entomol Soc Lond 1:185–198, 1836) in Mallorca and Menorca, which is recorded for the first time in the Balearic Islands, confirming its rapid expansion along the Mediterranean. When comparing reproductive traits between both alien species, we found that P. pusilla has a higher fecundity than C. scaura for the same female size. Taking into account this evidence, the species may be expected to appear in other Mediterranean and adjacent areas.
    Full-text · Article · Dec 2013 · Helgoland Marine Research
    • "The accessory thorn is missing in very large males. The inner margin of the claw is angular' (translated from Mayer, 1903) Caprella mutica 'Bearing a palmar spine, poison tooth situated near by a triangular tooth at distal angle of palm' (Arimoto, 1976) 'The middle projection is most prominent on the grasping margin of the propodus' (Willis et al., 2004) invaluable to help identify and validate simple morphological measurements that can be used in future studies and identification keys (Rohlf & Marcus, 1993 ). With their hard exoskeletons , crustaceans should be excellent candidates for such analyses (Rufino et al., 2006). "
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    ABSTRACT: Characteristics of the second gnathopod are traditionally used to distinguish between species of caprellid amphipods. However, these distinctions are often subjective and can be variable within a species. Geometric morphometrics were used to quantitatively assess shape variation of the second gnathopod propodus of three species of caprellids in North America, including the non-native Caprella mutica. Gnathopod shapes of C. mutica specimens from different latitudes revealed distinct morphologies; the factors responsible for the shape variations are unknown. Allometric change of propodus shape was observed in C. mutica. Larger individuals showed a wide array of possible propodus morphologies. Despite this variability, there were clear differences between large specimens of C. mutica and two species native to North America: C. alaskana and C. kennerlyi. The use of geometric morphometrics and the thin-plate spline method can serve to both complement descriptions using traditional keys and aid in identification of non-native species in novel geographical regions.
    No preview · Article · Apr 2009 · Journal of the Marine Biological Association of the UK
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