The signal crayfish, Pacifastacus leniusculus (Dana, 1852) [Crustacea: Decapoda: Astacidae], in the Brugneto Lake (Liguria, NW Italy). The beginning of the invasion of the River Po watershed?

Capurro, Matteo; Galli, Loris; Mori, Masato; Salvidio, Sebastiano; Arillo, Attilio

doi:10.3391/ai.2007.2.1.2

Cited by 20 publications

(8 citation statements)

References 42 publications

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“…According to Capurro et al (2009), the age at which females and males reach the sizes at sexual maturity estimated in this paper corresponds to about 3 years old. Such results are in agreement with those obtained by Guan and Wiles (1999) for the introduced population in River Great Ouse: both males and females matured in their third year, at a size of 36-38 mm CTL.…”

Section: Discussionmentioning

confidence: 80%

“…As reported in Capurro et al (2007), Pacifastacus leniusculus has colonised the whole basin of Brugneto Lake excluding the greater depths (51-70 m), evolving a well-structured population probably thanks to a suitable habitat for its breeding and growth (Capurro et al 2009). As has been argued by Dana et al (2010), understanding the biological characteristics of this invasive species within a newly colonised habitat is important for planning rational and effective management programmes to prevent further expansion of the species itself.…”

Section: Introductionmentioning

confidence: 65%

“…Pacifastacus leniusculus is a long-lived species: techniques based on the use of lipofuscin, a neuronal age pigment, allowed the assessment of a mean estimated longevity of this species between 6 and 16 years, with some specimens able to live up to 20 years (Belchier et al 1998;Souty-Grosset et al 2006). Previous studies on the P. leniusculus population living in the Brugneto Lake indicate that a certain number of individuals are 7 years old (Capurro et al 2009). …”

Section: Discussionmentioning

confidence: 96%

“…The improved knowledge of the reproductive cycle of P. leniusculus inhabiting Brugneto Lake could be then overlaid on the previous highlighted size distribution and Catch Per Unit Effort (CPUE) of crayfish removed by trapping during autumn (Capurro et al 2009). We hypothesise that intensive catches conducted mainly in late summer/early autumn would affect potential breeders at a crucial phase of the biological cycle.…”

Section: Discussionmentioning

confidence: 99%

“…Specimens were captured monthly from December 2007 to November 2008 with two-way baited traps set along the lakeshore at 5-18 m depth, as in this depth range P. leniusculus showed the maximum catch per unit effort (Capurro et al 2009). Crayfish were immediately frozen, using a portable refrigerator, to preserve the gonads, and then thawed at the laboratory for analysis.…”

Section: Sampling and Laboratory Workmentioning

confidence: 99%

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Reproductive cycle ofPacifastacus leniusculus(Dana) (Crustacea: Decapoda) from the Brugneto Lake (Liguria, northwest Italy)

Capurro

Galli

Mori

et al. 2015

Italian Journal of Zoology

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This paper investigates the reproductive biology of the signal crayfish Pacifastacus leniusculus (Dana). This North American species was introduced around the year 2002 in the Brugneto Lake (NW Italy), an oligotrophic artificial lake lying 780 m above sea level. Various aspects essential to understanding reproductive biology were examined. P. leniusculus exhibits obvious sexual dimorphism, but previous studies have only identified juvenile and adult males and did not indicate the presence of adolescent specimens (according to the literature, physiologically mature but morphometrically immature specimens). The analyses of the morphological characters of the male chelae, performed in the present work, instead suggest the presence of a more robust (and possibly dominant) male morphotype. It is therefore possible that even adolescents of this species (whose cephalothorax length at sexual maturity was estimated at 47.4 mm) are morphologically adult individuals, and that the specimens considered in the present work as adults (cephalothorax length, CTL, 63.6 mm) are morphotypes stemming from particular environmental conditions. In P. leniusculus of the Brugneto Lake, ovaries mature progressively between July and January and oviposition occurs between October and February; young hatch from May to July. The smallest ovigerous females collected during the present investigation were 36 mm CTL, while the estimated CTL at sexual maturity for females was about 40.3 mm, at an age of 3 years. Reproductive output increased with body size, as larger females produced more eggs.

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Section: Discussionmentioning

confidence: 80%

Section: Introductionmentioning

confidence: 65%

Section: Discussionmentioning

confidence: 96%

Section: Discussionmentioning

confidence: 99%

Section: Sampling and Laboratory Workmentioning

confidence: 99%

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Reproductive cycle ofPacifastacus leniusculus(Dana) (Crustacea: Decapoda) from the Brugneto Lake (Liguria, northwest Italy)

Capurro

Galli

Mori

et al. 2015

Italian Journal of Zoology

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Animal xenodiversity in Italian inland waters: distribution, modes of arrival, and pathways

et al. 2007

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The paper provides a list of the non-indigenous animal species occurring today in Italian inland waters. Xenodiversity was found to amount to 112 species (64 invertebrates and 48 vertebrates), which contribute for about 2% to the inland-water fauna in Italy. Northern and central regions are most affected, and Asia, North America, and the rest of Europe are the main donor continents. The large majority of non-indigenous species entered Italy as a direct or indirect effect of human intervention. A difference between invertebrates and vertebrates was found for their mode of arrival (unintentional for invertebrates and intentional for vertebrates). Accidental transport, in association with both fish (for aquaculture or stock enhancement) and crops, has been the main vector of invertebrate introductions, whereas vertebrates were mostly released for stocking purposes. Overall stock enhancement (47.92%) and culture (37.5%) prevailed over the other pathways. Seventeen and 7 species of our list are included among the 100 worst invasive species of Europe (DAISIE) and of the world (IUCN), respectively. For some (but not all) non-indigenous species recorded in Italy the multilevel impact exerted on the recipient communities and ecosystems is known, even if rarely quantified, but knowledge on their chronic impact is still missing. Additional research is needed to provide criteria for prioritizing intervention against well established invaders and identify which new potential invader should be targeted as "unwanted"

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Sex- and size-specific migration patterns and habitat preferences of invasive signal crayfish (Pacifastacus leniusculus Dana)

Wutz

Geist

2013

Limnologica

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The signal crayfish, Pacifastacus leniusculus (Dana, 1852) [Crustacea: Decapoda: Astacidae], in the Brugneto Lake (Liguria, NW Italy). The beginning of the invasion of the River Po watershed?

Cited by 20 publications

References 42 publications

Reproductive cycle ofPacifastacus leniusculus(Dana) (Crustacea: Decapoda) from the Brugneto Lake (Liguria, northwest Italy)

Reproductive cycle ofPacifastacus leniusculus(Dana) (Crustacea: Decapoda) from the Brugneto Lake (Liguria, northwest Italy)

Animal xenodiversity in Italian inland waters: distribution, modes of arrival, and pathways

Sex- and size-specific migration patterns and habitat preferences of invasive signal crayfish (Pacifastacus leniusculus Dana)

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