An analysis of the mechanisms governing species replacements in crayfish

Butler, Mark J.; Stein, Roy A.

doi:10.1007/bf00379851

Cited by 137 publications

(113 citation statements)

References 51 publications

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“…Similar intermating has been encountered in other Astacidae (HOLDICH et al, 1995b) and also in Cambaridae in which species producing more juveniles and having faster growth (like P. leniusculus) have suffered less from impaired reproductive success due to intermating between species in sympatry (e.g. CAPELLI and MUNJAL, 1982 ;BUTLER and STEIN, 1985 ;HOBBS III, JASS and HUNER, 1989 ;LODGE and HILL, 1994). It is noteworthy that SÖDERBÄCK (1993, 1994b, 1995) has attributed the near extinction of A. astacus co-occurring in a Swedish lake with P. leniusculus to the combined effect of interspecific competition, predation and reproductive interference.…”

Section: Discussionsupporting

confidence: 67%

“…larger body and chela size, faster growth, aggressive behaviour, greater fecundity and overall thermal tolerance (RUTLEDGE and PRITCHARD, 1981 ;FIRKINS and HOLDICH, 1993), found in successful invaders (reviewed e.g. by BUTLER and STEIN, 1985 ;MATHER, 1990 ;LODGE and HILL, 1994 ;LINDQVIST and HUNER, 1999). In P. leniusculus, these characteristics may interact in many ways, for example, its faster growth rate and greater fecundity may be due to greater aggressiveness and activity, securing continuous access to food resources and shelter-giving habitats.…”

Section: Discussionmentioning

confidence: 99%

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Long Term Study of Competition Between Two Co-Occurring Crayfish Species, the Native Astacus Astacus L. And the Introduced Pacifastacus Leniusculus Dana, in a Finnish Lake.

Westman¹,

Savolainen²

2001

Bull. Fr. Pêche Piscic.

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Since 1893, crayfish plague, Aphanomyces astaci Schikora, has devastated Finland's most productive populations of the native noble crayfish, Astacus astacus, causing great losses to once very valuable fisheries and exports. Efforts to halt the spread of the plague having failed, it was decided in the late 1960s to attempt to revive crayfish production and fisheries by introducing the plague-resistant North American signal crayfish, Pacifastacus leniusculus, into infected waters. So far P. leniusculus has been stocked in more than 300 waterbodies and is currently known to reproduce in roughly 100 of them. In some lakes both species live in sympatry. We have studied the interactions of co-existing A. astacus and P. leniusculus in the small lake of Slickolampi for 30 years. According to annual trap catches and population size estimates, A. astacus was clearly dominant up to the end of the 1980s, but in the 1990s P. leniusculus became dominant. In the last sampling, in August 1999, it accounted for > 98 % of total catches. In the course of three decades, then, P. leniusculus has almost completely replaced A. astacus. P. leniusculus has many of the characteristics commonly found in the successful crayfish invader. Our comparative studies in this lake show that P. leniusculus individuals grow considerably more rapidly, and that females reproduce for the first time at a younger age, attain reproductive activity at a larger size, and have greater fecundity in all size groups than A. astacus. The greater abundance of chelae injury in A. astacus than in P. leniusculus and the increase in injuries with expansion of the P. leniusculus population point to agonistic encounters in which P. leniusculus is dominant.Long-term data on co-existing A. astacus and P. leniusculus demonstrate that they cannot live in sympatry without competition in which P. leniusculus with its larger body and chela size, faster growth, more aggressive behaviour and greater fecundity would be the stronger. However, a similar weakening of the A. astacus population at sites with only a minor population of P. leniusculus suggests that the elimination of A. astacus is due, not to competitive exclusion alone, but to a combination of several interacting mechanisms and that the ultimate reason for the collapse of A. astacus is the almost complete cessation of successful reproduction as a result of reproductive interference between the two species. It is therefore futile to stock productive A. astacus waters with plague-free P. leniusculus in the expectation of better total catches. P. leniusculus should be introduced only into Article available at http://www.kmae-journal.org or http://dx.doi.org/10.1051/kmae:2001008-614 -chronically plague-infected waters. The preservation of the native A. astacus, along with efforts to secure its valuable catches, requires above all the formulation of an action plan and a greater input into research, especially on crayfish plague control, crayfish management, and interactions between P. leniusculus and A. astacus.Key...

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Section: Discussionsupporting

confidence: 67%

Section: Discussionmentioning

confidence: 99%

Long Term Study of Competition Between Two Co-Occurring Crayfish Species, the Native Astacus Astacus L. And the Introduced Pacifastacus Leniusculus Dana, in a Finnish Lake.

Westman¹,

Savolainen²

2001

Bull. Fr. Pêche Piscic.

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“…These include diverse life history traits (higher individual growth rates, earlier sexual maturity and higher fecundity) (HUNER and LINDQVIST, 1995;GHERARDI et al, 1999), recruitment failure (SÖDERBÄCK, 1995), differential susceptibility to predation (BUTLER and STEIN, 1985;LODGE et al, 1986;DiDONATO and LODGE, 1993;MATHER and STEIN, 1993;GARVEY et al, 1994), and reproductive interference (CAPELLI and CAPELLI, 1980;BERRILL, 1985;BUTLER and STEIN, 1985;SÖDERBÄCK, 1994;HOLDICH et al, 1995).…”

Section: Replacement Of Indigenous Speciesmentioning

confidence: 99%

Roundtable Session 2b: National Interactions Between Non-Indigenous and Indigenous Crayfish Species

Gherardi¹,

Śmietana²,

Laurent³

2002

Bull. Fr. Pêche Piscic.

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The main object of the present essay is to summarise some aspects underlying the interactions between non-indigenous (NICS) and indigenous (ICS) crayfish species. The discussion has been also extended to the effects exercised by NICS on the natural habitats they occupy. While doing research on the dyads NICS/ICS, one starting point is to extrapolate common traits that make NICS good invaders from the analysis of their biology, ecology and ethology and the comparison with indigenous species. A subsequent step is to switch attention to the understanding of the characteristics that make ecosystems less vulnerable to invasions and then to analyse both the complex interactions of invaders and target communities and the negative and positive impacts exerted by NICS on the occupied habitats. Examples from Sweden, Britain, and Italy have shown that NICS can replace the native species by a combination of several interacting mechanisms. Besides the transmission of the crayfish plague fungus, mechanisms into action include mostly competitive interference, but also diverse life history traits, recruitment failure, differential susceptibility to predation, and reproductive interference. It has been claimed that invasion theory is full of rules of thumb that, having no precise predictive powers, are thus useless to guide reliable public policy. The solution of the prediction problem requires an in-depth study of every potential invader and target community, trespassing the boundaries among disciplines and having a look at crayfish as a whole and not a single entity. The expectation is thus the return to precise and clear empirical generalisations that can be most useful to develop management strategies.

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“…While inter-species sexual behaviours are well-documented (Andrews et al 1982;Dame and Petren 2006;de Bruyn et al 2008), the ecological effects of such interactions are still poorly understood (Gröning and Hochkirch 2008). RI has been implicated in both the exclusion of native species by invasive ones (Butler and Stein 1985) and in determining the ecology and habitat use of naturally co-occurring species . If the fitness consequences of RI are sufficient then it may lead to ecological or evolutionary changes that mitigate this cost, including reproductive character displacement (Pfennig and Pfennig 2009).…”

Section: Introductionmentioning

confidence: 99%

The extent and costs of reproductive interference among four species of true bug

et al. 2015

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Reproductive interference arises when individuals of one species engage in reproductive activities with individuals of another, leading to fitness costs in one or both species. Reproductive interference (RI) therefore has two components. First, there must be mis-directed mating interactions. Second, there must be costs associated with these mis-directed interactions. Here we consider RI between four species of true bug in the family Lygaeidae, focusing in particular on the fitness consequences to Lygaeus equestris. The species we consider vary in their relationships with each other, including species in the same or different genus, and with or without natural overlap in their geographic ranges. First we show that inter-specific mating interactions, although not a certain outcome, are common enough to perhaps influence mating behaviour in these species (arising in up to 10 % of inter-specific pairings). Second, we show that reproductive interference can seriously reduce female fitness in L. equestris. Importantly, different species impose different costs of RI on L. equestris, with interactions with male Spilostethus pandurus inflicting fitness costs of similar magnitude to the costs of mating with con-specifics. On the other hand, mating interactions with male Oncopeltus fasciatus appear to have no effect on female fitness. In a follow-up experiment, when we allowed competition amongst just females of S. pandurus and L. equestris, the fitness of the latter was not reduced, arguing more strongly for the role of reproductive interference. However, in our final experiments under mass mating conditions with extended ecological interactions (including scope for competition for resources and cannibalism), the costs of RI were less apparent. Our data therefore suggest that the costs of RI will be contextspecific and may act in concert with, or be swamped by, other ecological effects. We suggest that comparative studies of this sort that both mimic naturally occurring reproductive interference events, and also artificially generate new ones, will be necessary if we are to better understand the ecological and evolutionary significance of reproductive interference.

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An analysis of the mechanisms governing species replacements in crayfish

Abstract: SummaryWe investigated mechanisms governing replacement of the native crayfish Orconectes sanborni by an invading crayfish, Orconectes rusticus. The two species had similar life histories, habitat preferences, and feeding patterns in allopatric and sympatric stream areas.

Cited by 137 publications

References 51 publications

Long Term Study of Competition Between Two Co-Occurring Crayfish Species, the Native Astacus Astacus L. And the Introduced Pacifastacus Leniusculus Dana, in a Finnish Lake.

Long Term Study of Competition Between Two Co-Occurring Crayfish Species, the Native Astacus Astacus L. And the Introduced Pacifastacus Leniusculus Dana, in a Finnish Lake.

Roundtable Session 2b: National Interactions Between Non-Indigenous and Indigenous Crayfish Species

The extent and costs of reproductive interference among four species of true bug

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