Over-invasion in a freshwater ecosystem: newly introduced virile crayfish (<i>Orconectes virilis</i>) outcompete established invasive signal crayfish (<i>Pacifastacus leniusculus</i>)

James, J. Ben; Thomas, John Rhidian; Ellis, Adam; Young, Kyle A.; England, Judy; Cable, Joanne

doi:10.1080/10236244.2015.1109181

Cited by 25 publications

(17 citation statements)

References 35 publications

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“…, James et al. ). In general, species distributions and impacts in novel communities and ecosystems can probably be better understood when considering the time of introduction of species rather than simply dividing species into native and non‐native ones.…”

Section: Discussionmentioning

confidence: 99%

“…For example, aquaria or other hatchery-reared fish are more vulnerable to predation than those that have experienced predation (Kellison et al 2000, Yokota et al 2007. Some studies looked at agonistic behaviors among competing old and new invasive crayfish species (Chucholl et al 2008, Hudina et al 2011, James et al 2016), but broader behavioral comparisons are necessary to investigate the invasive potential of species before or at an early stage of invasion.…”

Section: Ornamental Crayfish Invasionsmentioning

confidence: 99%

“…, James et al. ), but broader behavioral comparisons are necessary to investigate the invasive potential of species before or at an early stage of invasion.…”

Section: Introductionmentioning

confidence: 99%

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Behavioral differences in an over‐invasion scenario: marbled vs. spiny‐cheek crayfish

et al. 2018

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New species often invade ecosystems already dominated by previous invaders. Ornamental freshwater crayfish, particularly parthenogenetic marbled crayfish (Procambarus virginalis), increasingly establish in European water bodies where they interact with resident native and non‐native species. Behavioral traits and behavioral syndromes can influence the outcome of these species interactions. The behavior of non‐native crayfish is often studied in notorious invaders but rarely in new and emerging species, although those provide the best opportunity for management. Activity, aggressiveness, and boldness have repeatedly been associated with invasion success and species displacement. Further, crayfish can adapt their behavior after they have established in the new range. We investigated whether marbled crayfish can displace the widely established spiny‐cheek crayfish (Orconectes limosus). Specifically, we compared their behavioral traits and evaluated whether these traits differ, using marbled crayfish populations from aquaria and the field and spiny‐cheek crayfish from the field. We staged agonistic encounters, measured activity levels, and recorded the response to a simulated threat of both species and both origins (field and aquarium) in laboratory trials. We found that in agonistic encounters, marbled crayfish were on average more aggressive than spiny‐cheek crayfish, even against larger opponents. Aggressiveness and activity were positively correlated, which is indicative for an aggression syndrome. Marbled crayfish from the field were less active than those from aquaria, but there was no difference in aggressiveness. Marbled crayfish often froze in response to a simulated threat, whereas spiny‐cheek crayfish reacted either offensively or defensively. These results from the laboratory illustrate potentially important behavioral mechanisms behind crayfish over‐invasions and show behavioral plasticity in a species where all known individuals are genetically identical. To better understand the invasion process in nature, the species’ reproductive biology and interactions with other members of the community should be considered. We conclude that the recent success of marbled crayfish in establishing new populations could be influenced by their behavioral flexibility and their potential to competitively persist in the presence of established invasive crayfish.

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Section: Discussionmentioning

confidence: 99%

Section: Ornamental Crayfish Invasionsmentioning

confidence: 99%

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Behavioral differences in an over‐invasion scenario: marbled vs. spiny‐cheek crayfish

et al. 2018

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“…In the present study, X. victoriensis transmitted readily between signal and virile crayfish, which co-exist in the UK (James et al, 2015d). Intra-specific transmission occurred faster between novel virile crayfish hosts, compared to signal crayfish, potentially due to the higher aggression of this species and thus more frequent interactions (James et al, 2015d).…”

Section: Discussionmentioning

confidence: 94%

“…Uninfected virile crayfish [Orconectes virilis (Hagen, 1870)] were collected from the River Lee (London, England, Grid Reference: TL370028). Although X. victoriensis have never been reported on virile crayfish, signal and virile crayfish co-exist in the UK (James et al, 2015d).…”

Section: Animal Origin and Maintenancementioning

confidence: 99%

Transmission and terrestrial dispersal of non-native ectosymbionts on invasive crayfish

et al. 2018

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Symbionts are a fundamental component of biological systems, and their survival is highly dependent on transmission and host movement. Ectosymbionts of amphibious animals face the added challenge of having to survive dramatic environmental changes as their hosts cross ecosystem boundaries. Within freshwaters, crayfish are amongst the most widespread invasive species that readily disperse overland and are host to a wide range of ectosymbionts. Relatively little is known about the transmission of these ectosymbionts, including their ability to survive overland host migration. Here, we assessed terrestrial emigration and both inter-and intra-specific transmissions of Xironogiton victoriensis, a nonnative branchiobdellidan (Annelida: Clitellata) recently found on invasive signal crayfish (Pacifastacus leniusculus) in the UK. These branchiobdellidans tolerated desiccation and did not alter host terrestrial behaviour. Transmission was rapid between natural signal and novel virile (Orconectes cf. virilis) crayfish hosts, with host interactions facilitating transmission.Thus, branchiobdellidans can disperse via amphibious host behaviour and readily infect novel hosts. These traits facilitate symbionts' survival and provide access to additional dispersal pathways that are likely to aid transmission.

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Field estimates of crayfish mortality associated with passive integrated transponder tagging

Hamilton

Cooper

Turner

2022

Aquatic Conservation

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1. Mark-recapture studies of crayfish using internally implanted passive integrated transponder (PIT) tags is a promising method for understanding details of crayfish ecology. The size of crayfish that can be marked is dependent on the size of the PIT tag. Several studies have examined mortality rates associated with the insertion of the smallest currently available PIT tags (Biomark MiniHPT8, 8.4 Â 1.4 mm) using different insertion locations and husbandry conditions.2. Here, carapace length-and sex-dependent mortality rates were evaluated for three ventral PIT tag insertion locations (central, pleopod and lateral) in a field experiment focusing on the northern crayfish (Faxonius virilis) in the Gila River Basin where it was introduced several decades ago.3. The central insertion method was the only treatment group that did not exceed background mortality in two trials for all individuals combined. When evaluated by sex, no insertion method exceeded control mortality in males, and only the lateral insertion method exceeded control mortality in females. The relationship between carapace length and mortality was different depending on the PIT tag insertion location and sex. 4. Regardless of sex or size, F. virilis responded with lower mortality rates when the PIT tag was inserted using the central insertion method, and this method is preferred for tagging F. virilis of ≥20 mm carapace length.5. Crayfish are large-bodied macroinvertebrate omnivores with important roles in freshwater ecosystems. This article identifies best practices for internal PIT tag placement, provides estimates of mortality associated with tagging, and thereby advances ecological research focused on the conservation of imperilled or sensitive crayfishes. It also provides useful guidance for studies of non-native crayfish in communities where they have become invasive.

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Over-invasion in a freshwater ecosystem: newly introduced virile crayfish (Orconectes virilis) outcompete established invasive signal crayfish (Pacifastacus leniusculus)

Cited by 25 publications

References 35 publications

Behavioral differences in an over‐invasion scenario: marbled vs. spiny‐cheek crayfish

Behavioral differences in an over‐invasion scenario: marbled vs. spiny‐cheek crayfish

Transmission and terrestrial dispersal of non-native ectosymbionts on invasive crayfish

Field estimates of crayfish mortality associated with passive integrated transponder tagging

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