scholarly journals Acute toxicity of two pyrethroid insecticides for five non-indigenous crayfish species in Europe

2019 ◽  
Vol 64 (No. 03) ◽  
pp. 125-133 ◽  
Author(s):  
J Lidova ◽  
M Buric ◽  
A Kouba ◽  
J Velisek
Keyword(s):  
Active Compound ◽  
Procambarus Clarkii ◽  
Size Difference ◽  
Local Conditions ◽  
Pyrethroid Insecticides ◽  
Signal Crayfish ◽  
Orconectes Limosus ◽  
Red Swamp Crayfish ◽  
Marbled Crayfish ◽  
Crayfish Species

Pyrethroid insecticides are highly toxic to many aquatic organisms. The aim of this study was to evaluate the toxicity of the commercial products Cyperkill 25 EC (active compound 250 g/l cypermethrin) and Decis Mega (active compound 50 g/l deltamethrin) for European non-indigenous marbled crayfish Procambarus virginalis, red swamp crayfish Procambarus clarkii, signal crayfish Pacifastacus leniusculus, spiny-cheek crayfish Orconectes limosus and yabby Cherax destructor. These data will provide a baseline for potential programmes to eradicate alien crayfish from Europe (EU Regulation No. 1143/2014; Commission Implementing Regulation No. 2016/1141) and are also relevant globally. The 96hLC50 values of Cyperkill 25 EC were 0.09, 0.17, 0.18, 0.19 and 0.30 µg/l for spiny-cheek crayfish, red swamp crayfish, marbled crayfish, signal crayfish and yabby, respectively. In the same order, the 96hLC50 values of Decis Mega were 0.76, 0.16, 0.21, 0.03 and 0.27 µg/l. The toxicity of the insecticides was similar and species-specific, possibly reflecting the size difference of the tested animals. This study shows that cypermethrin and deltamethrin are highly toxic to the tested crayfish species at low concentrations. This high sensitivity, along with the low accumulation in the food chain and short-term persistence in the aquatic environment, suggests that they are suitable biocides for eradicating crayfish in the wild. Stagnant, closed water bodies with newly emerging invaders are ideal sites for possible application, although local conditions must be considered.

scholarly journals Survival, Growth, and Reproduction: Comparison of Marbled Crayfish with Four Prominent Crayfish Invaders

Biology ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 422
Author(s):  
Antonín Kouba ◽  
Boris Lipták ◽  
Jan Kubec ◽  
Martin Bláha ◽  
Lukáš Veselý ◽  
...  
Keyword(s):  
Interspecific Interactions ◽  
Single Species ◽  
Freshwater Crayfish ◽  
Sympatric Populations ◽  
Intraspecific Interactions ◽  
High Fecundity ◽  
Signal Crayfish ◽  
Early Maturation ◽  
Red Swamp Crayfish ◽  
Marbled Crayfish

Biological invasions are increasingly recognized ecological and economic threats to biodiversity and are projected to increase in the future. Introduced freshwater crayfish in particular are protruding invaders, exerting tremendous impacts on native biodiversity and ecosystem functioning, as exemplified by the North American spiny-cheek, signal and red swamp crayfish as well as the Australian common yabby. The marbled crayfish is among the most outstanding freshwater crayfish invaders due to its parthenogenetic reproduction combined with early maturation and high fecundity. As their introduced ranges expand, their sympatric populations become more frequent. The question of which species and under what circumstances will dominate in their introduced communities is of great interest to biodiversity conservation as it can offer valuable insights for understanding and prioritization of management efforts. In order to examine which of the aforementioned species may be more successful as an invader, we conducted a set of independent trials evaluating survival, growth, claw injury, and reproduction using single-species stocks (intraspecific interactions) and mixed stocks (interspecific interactions) of marbled crayfish vs. other crayfish invaders since the onset of exogenous feeding. In both single and mixed stocks, red swamp crayfish and yabby grew faster than marbled crayfish, while marbled crayfish were superior to both spiny-cheek and signal crayfish in terms of growth. With the exception of signal crayfish, the faster-growing species consistently reached a higher survival rate. The faster-growing species tended to negatively impair smaller counterparts by greater claw injury, delayed maturation, and reduced fecundity. Only marbled crayfish laid eggs as early as 14 weeks in this study, which is earlier than previously reported in the literature. Thus, the success of marbled crayfish among invasive crayfish is significantly driven by relatively fast growth as well as an early and frequent reproduction. These results shed light on how interactions between invasive populations can unfold when their expansion ranges overlap in the wild, thereby contributing to the knowledge base on the complex population dynamics between existing and emerging invasive species.

scholarly journals An appendage abnormality in the first left pereiopod of red swamp crayfish (Procambarus clarkii) reared in the laboratory conditions

2021 ◽  
Vol 38 (1) ◽  
pp. 107-109
Author(s):  
Onur Karadal
Keyword(s):  
Case Report ◽  
Procambarus Clarkii ◽  
Female Specimen ◽  
Commercial Importance ◽  
Laboratory Conditions ◽  
Red Swamp Crayfish ◽  
The World ◽  
The Right ◽  
Crayfish Species

Red swamp crayfish (Procambarus clarkii) is the most cultivated crayfish species in the world that has commercial importance for both aquaculture and aquarium industries. In this study, a case report of an appendage abnormality observed in the left cheliped of a female specimen (6.92 g) reared under laboratory conditions is presented. It has been determined that the specimen has two appendages in the left cheliped root. Of these appendages, the right one (1.27 cm) ends in a blunt. On the left (1.06 cm), a spiny structure similar to that of the fourth and fifth walking legs was observed

scholarly journals An ongoing saga: Endemic branchiobdellidans (Annelida: Clitellata) on translocated commercial North American crayfish

Zoosymposia ◽  
2020 ◽  
Vol 17 (1) ◽  
pp. 141-158
Author(s):  
STUART R. GELDER
Keyword(s):  
North America ◽  
North American ◽  
Host Species ◽  
Procambarus Clarkii ◽  
East Asian ◽  
Pacifastacus Leniusculus ◽  
Orconectes Limosus ◽  
The World ◽  
Commercial Species ◽  
Crayfish Species

Over the last 130 years demand for crayfish has exceeded regional supplies around the world, so stocks, primarily from North America, have been imported to satisfy this need. These demands are human based and include gastronomy, sport fishing bait, food for rearing animals, educational aides, ornamentation in waterbodies, and more recently a significant increase in pet crayfish sales. The three most common commercial species from North America are Pacifastacus leniusculus, Procambarus clarkii and Orconectes limosus, although four other species are increasing in importance as they become more widely distributed. All of these crayfish in their endemic range have been reported to carry branchiobdellidan annelids. Therefore, when the crayfish are translocated, their ectosymbionts likely accompany them. Eighty-six potentially transportable branchiobdellidans are recognized in this paper, along with the distribution of six species known to have been translocated. Moreover, branchiobdellidans endemic to the translocation regions have adopted introduced crustacean hosts, which demonstrates that branchiobdellidan host species specificity is not as restrictive as many researchers believe. On the evidence to date, these translocated branchiobdellidans appear to have the same relationship and cause the same amount of damage, if any, as those on their endemic crayfish hosts. The geographical distribution of endemic branchiobdellidan—crayfish species associations are unique to each of four disjunct regions as defined by Bănărescu: Euro-Mediterranean, East Asian, western North American and eastern North American; the latter includes eastward drainages from Canada to Costa Rica.

PHARMACOKINETICS OF FLORFENICOL AND ITS METABOLITE, FLORFENICOL AMINE, IN RED SWAMP CRAYFISH, PROCAMBARUS CLARKII

2011 ◽  
Vol 35 (2) ◽  
pp. 307-312 ◽  
Author(s):  
Gang-Yi YUE ◽  
Zhi-Xin WU ◽  
Qian YANG ◽  
Yi QU ◽  
Li-Jiao PANG ◽  
...  
Keyword(s):  
Procambarus Clarkii ◽  
Red Swamp Crayfish

scholarly journals First Record of the Alien Species Procambarus virginalis Lyko, 2017 in Fresh Waters of Sardinia and Insight into Its Genetic Variability

Life ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 606
Author(s):  
Daria Sanna ◽  
Ilenia Azzena ◽  
Fabio Scarpa ◽  
Piero Cossu ◽  
Angela Pira ◽  
...  
Keyword(s):  
Genetic Variability ◽  
Alien Species ◽  
Procambarus Clarkii ◽  
Mitochondrial Gene ◽  
First Record ◽  
Indigenous Species ◽  
Fresh Waters ◽  
Mediterranean Island ◽  
Marbled Crayfish ◽  
Non Indigenous Species

In the fresh waters of Sardinia (Italy), the non-indigenous crayfish species Procambarus clarkii has been reported from 2005, but, starting from 2019, there have been several reports of a new non-indigenous crayfish in southern and central areas of this Mediterranean island, and its morphology suggests that this species may be the marbled crayfish Procambarus virginalis. Forty-seven individuals of this putative species were analyzed, using the mitochondrial gene Cytochrome c Oxidase subunit I as molecular marker to identify this crayfish and investigate the level of genetic variability within the recently established population. Phylogenetic and phylogeographic analyses were carried out on a dataset including sequences from the Sardinian individuals and from all congenerics available in GenBank. Results showed that the new Sardinian crayfish belong to the species P. virginalis. All the sequences belonging to P. virginalis from European countries are identical, with only few exceptions found among Sardinian individuals. In conclusion, this paper highlights the occurrence of a new further alien species in the Sardinian fresh waters, which are already characterized by the high presence of non-indigenous species.

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