Population structure and dynamics of Procambarus clarkii (Girard, 1852) in a Mediterranean brackish wetland (Central Italy)

Scalici, Massimiliano; Chiesa, Stefania; Scuderi, S; Celauro, Deborah; Gibertini, Giancarlo

doi:10.1007/s10530-009-9557-6

Cited by 62 publications

(66 citation statements)

References 34 publications

(65 reference statements)

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“…The dataset of our study exceeded the minimum of 200 specimens suggested by France et al (1991) and the estimated life-history parameters are in good accordance with previous studies on white-clawed crayfish (cf. Scalici et al, 2010). In particular, the obtained growth performance indexes were identical to the values reported by other studies (Table III), which indicates that our growth parameter estimates are not biased (Pauly and Munro, 1984).…”

Section: > Growth and Life Historysupporting

confidence: 87%

“…To estimate life-history traits, growth was described using the Von Bertalanffy's Growth Function (VBGF), adjusted for seasonal growth in summer and no growth in winter (Pauly and Morgan, 1987;Scalici et al, 2010;Ghia et al, 2015):…”

Section: > Growth and Life-history Traitsmentioning

confidence: 99%

“…(2015) 416, 24 2015). CL ∞ and k were estimated for each sex from the obtained 1 mm size-frequency distributions within the ELEFAN I module (non-parametric scoring of the VBGF fit) in the FAO-ICLARM Stock Assessment Tools software (FiSAT 2 v.1.2.2; Pauly and David, 1981;Gayanilo and Pauly, 1997;Scalici et al, 2010), and t 0 was assessed by non-linear regression analysis. Longevity (t max ) was estimated by t max = (3/k) + t 0 (Gayanilo and Pauly, 1997;Scalici and Gherardi, 2007).…”

Section: > Growth and Life-history Traitsmentioning

confidence: 99%

“…The relationship between female CL and the estimated pleopodal fecundity was described by linear regression, with CL as independent variable. Finally, we used principal component analysis (PCA) to plot different populations of the white-clawed crayfish species complex according to life-history traits (φ , k, t max , and CL ∞ ; as summarized in Scalici et al, 2010 andGhia et al, 2015).…”

Section: > Statistical Analysesmentioning

confidence: 99%

“…Sex-specific growth patterns are known from a number of crayfish species, including white-clawed crayfish, and are probably driven by slower growth of adult females due to a lower moult frequency because female crayfish cannot moult while bearing eggs (Reynolds, 2002;Scalici et al, 2010;Ghia et al, 2015). Furthermore, moult increments of mature females are smaller than those of males because of the high energetic demands of egg production coupled with a feeding inhibition while bearing eggs (Reynolds, 2002).…”

Section: Figurementioning

confidence: 99%

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Population ecology of endangered white-clawed crayfish (Austropotamobius pallipess. str.) in a small rhithral river in Germany

Wendler

Biss

Chucholl

2015

Knowl. Manag. Aquat. Ecosyst.

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Key-words: population dynamics, imperiled species, white-clawed crayfish, stone crayfish, AustropotamobiusSound knowledge on distribution and ecology of imperiled species is an essential prerequisite for effective conservation planning. Here, we report the distribution and autecological traits of a newly discovered population of critically-endangered white-clawed crayfish (Austropotamobius pallipes s. str.) in a small river in southwestern Germany. Using an established crayfish survey protocol, we detected white-clawed crayfish in a river stretch of 4.5 km, with an estimated abundance of 1.4 ± 0.2 indiv.·m −2 . The sex ratio was even and sexual maturity was attained at approximately 25 mm carapace length (CL). Life-history traits, as assessed using Von Bertalanffy's growth function, indicate a life history most similar to populations in France, with longevity, asymptotic size, and growth performance index being higher in males than in females (11 y, 46 mm CL, and 2.8 and 9 y, 41 mm CL, and 2.7, for males and females, respectively). Estimated fecundity ranged from 9 to 135 eggs·female −1 (mean: 90 ± 28). White-clawed crayfish were also found in lower reaches of small tributary streams, of which one also featured endangered stone crayfish (Austropotamobius torrentium). A syntopic occurrence of both species was recorded for the first time within a short stretch. Implications for species conservation are discussed. RÉSUMÉÉcologie de la population d'écrevisses à pattes blanches, en danger (Austropotamobius pallipes s. str.) dans un petit torrent en Allemagne Mots-clés :dynamique des populations, espèces en péril, écrevisse à pattes blanches, Une bonne connaissance sur la distribution et l'écologie des espèces en péril est une condition essentielle pour la planification d'une conservation efficace. Ici, nous rapportons la distribution et les traits autécologiques d'une population nouvellement découverte d'écrevisses à pattes blanches en danger critique (Austropotamobius pallipes s. str.) dans une petite rivière du sud-ouest d'Allemagne. Utilisant un protocole standard de suivi de l'écrevisse, nous avons détecté l'écrevisse à pattes blanches dans un tronçon de la rivière de 4,5 km, avec une abondance estimée de 1,4 ± 0,2 indiv·m −2 . Le sexe ratio était de un et la maturité sexuelle est

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Section: > Growth and Life Historysupporting

confidence: 87%

Section: > Growth and Life-history Traitsmentioning

confidence: 99%

Section: > Growth and Life-history Traitsmentioning

confidence: 99%

Section: > Statistical Analysesmentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

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Population ecology of endangered white-clawed crayfish (Austropotamobius pallipess. str.) in a small rhithral river in Germany

Wendler

Biss

Chucholl

2015

Knowl. Manag. Aquat. Ecosyst.

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Invasive dynamics of the crayfish Procambarus clarkii (Girard, 1852) in the international section of the River Minho (NW of the Iberian Peninsula)

Sousa

Freitas

Мота

et al. 2013

Aquatic Conservation

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ABSTRACT1. Procambarus clarkii (Girard, 1852) is a well-established invasive species in many worldwide aquatic ecosystems and is responsible for several ecological and economic impacts. This study examines the major factors responsible for its invasive dynamics in the international section of the River Minho (north-west Iberian Peninsula).2. Data collected from June 2007 to May 2011 showed that abundance and biomass increased in the first 3 years of sampling, but suffered a decrease in the fourth year. Higher abundance and biomass were always found from May to October. These higher values have a clear relationship with water temperature and probably reflect higher activity and mobility.3. The sex-ratio was 1.08:1 in favour of females; eggs start to appear in May/June and the majority of juveniles in August/September. 4. Information collected in this study is extremely important for future management actions that could be applied to this invasive species. Accordingly, we propose that control actions to minimize P. clarkii impacts in this system, such as intensive trapping, should be applied during late spring/early summer, when the catches are higher, the females are dominant, and before juvenile recruitment.

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Distribution and reproduction of Procambarus clarkii in relation to water management, salinity and habitat type in the Camargue

Meineri

Rodríguez‐Pérez

Hilaire

et al. 2013

Aquatic Conservation

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Procambarus clarkii, one of the most invasive aquatic species worldwide, is present in Mediterranean estuarine regions. Water management of these deltas involves massive freshwater inputs, reducing wetland salinity and altering natural flooding periods, two important factors for P. clarkii. The paper examines whether water management affects the distribution and reproduction success of P. clarkii in Mediterranean estuarine regions.Procambarus clarkii was sampled in the Camargue every 6 weeks throughout a whole year. Forty‐eight stations were sampled to represent the available habitats and water management types in the study region: temporary ponds, semi‐permanent marshes, permanent marshes, canals and ricefields. Salinity and habitat effects on capture probability, abundance and proportion of juveniles were explored within each season to study species distribution, to identify suitable habitats for reproduction and its timing, and to assess how salinity affects these traits.Only a few crayfish were found above 10 g L–1 salinity and a few juveniles were found above 5 g L–1. Procambarus clarkii was found in the five habitat types sampled but with lower capture probability and abundance in ricefields and canals. The proportion of juveniles was highest in temporary ponds during their seasonal peak.These results suggest that low salinity increases the occurrence, the abundance and the reproduction success of P. clarkii but that hydroperiod length per se does not affect P. clarkii. Furthermore, the results suggest that temporary water bodies within the salinity range of the species are used as safe sites for reproduction.A significant reduction of freshwater inputs into estuarine ecosystems is needed to restore a higher salinity level and to reduce the reproductive success and expansion of P. clarkii. Copyright © 2013 John Wiley & Sons, Ltd.

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Population structure and dynamics of Procambarus clarkii (Girard, 1852) in a Mediterranean brackish wetland (Central Italy)

Cited by 62 publications

References 34 publications

Population ecology of endangered white-clawed crayfish (Austropotamobius pallipess. str.) in a small rhithral river in Germany

Population ecology of endangered white-clawed crayfish (Austropotamobius pallipess. str.) in a small rhithral river in Germany

Invasive dynamics of the crayfish Procambarus clarkii (Girard, 1852) in the international section of the River Minho (NW of the Iberian Peninsula)

Distribution and reproduction of Procambarus clarkii in relation to water management, salinity and habitat type in the Camargue

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