Jiří Patoka | Czech University of Life Sciences Prague (original) (raw)
Papers by Jiří Patoka
Human Dimensions of Wildlife, Feb 13, 2023
<i>Nocticola baumi</i> n. sp. <b>Material examined:</b> <i>Holotype... more <i>Nocticola baumi</i> n. sp. <b>Material examined:</b> <i>Holotype</i>: INDONESIA • &male;; Hagepma cave, New Guinea Highlands, Jayawijaya Regency, Papua Province; 04°01.933' S, 139°00.221' E; 11-12 July 2017; Ji&rcaron;í Patoka & Martin Bláha leg., slide mounted (MZB.Orth.21847). <i>Paratypes:</i> INDONESIA • 7 adults &female;, 5 nymphs &female;, 2 nymphs &male;; same data as holotype (MZB). <b>Diagnosis:</b> Vertex weakly exposed. Eyes and ocelli absent. First antennal flagellomere distinctly longer than succeeding individual flagellomeres. Pronotum ovoid, longer than wide. Profemur Type C. Legs extremely elongate; meso- and metafemora nearly as long as the body. Genal spines minute. Tarsal claws simple, symmetrical. Pulvilli and arolium absent. Tegmina well-developed extending beyond the supra-anal plate, venations dissimilar, weak and indistinct. Hind wings absent. Abdominal tergites unspecialized. Supra-anal plate subtruncate with weak mesal indentation; cerci nearly as long as the abdomen. Subgenital plate weakly asymmetrical. The absence of specialized tergal gland places the new species to <i>simoni</i> -species group. <i>Nocticola baumi</i> <b>n. sp.</b> resembles the macropterous form of <i>Nocticola currani</i> Trotter <i>et al</i>., 2017. Specific similarities are in the fully-developed tegmina, absence of sub-apical lobe in L3 (L2d in Trotter <i>et al</i>. 2017), and recurved, sickle-like L2d (L3d in Trotter <i>et al</i>. 2017). It differs from <i>N</i>. <i>currani</i> in the absence of hind wings and eyes (present on <i>N</i>. <i>currani</i>), shape of the pronotum (longer than wide in <i>N</i>. <i>baumi</i> while wider than long in <i>N</i>. <i>currani</i>), extremely elongate legs (almost three times than that of <i>N. currani</i>), and the shape of R1 (long, paddle-shaped, and weakly sclerotized in <i>N</i>. <i>baumi</i> while short, large with heavily sclerotized caudal edge on <i>N</i>. <i>currani</i>). Among other members of cavernicolous <i>simoni</i> -species group, [...]
Diversity, 2021
Ornamental aquaculture is one of the main sources of non-native species worldwide. Unintentionall... more Ornamental aquaculture is one of the main sources of non-native species worldwide. Unintentionally transported “hitchhiking” organisms have been previously recorded; although most of these species are transported from tropical regions, here we report on the first accidental transport of the zebra mussel (Dreissena polymorpha) in a shipment of ornamental Aegagropila linnaei (Chlorophyta) from Russia to the Czech Republic. This invasive mussel is listed on the national blacklist of alien species in the Czech Republic and can be easily released in outdoor garden ponds together with A. linnaei. Since the Czech Republic is known to be a gateway for aquatic ornamental species from a European perspective, re-export to other European countries is also possible. Thus, the spread of D. polymorpha via this pathway cannot be excluded. This finding should be of importance to conservationists, traders, decision-makers and other stakeholders.
Zootaxa, 2021
A new species of highly troglobitic cockroach, Nocticola baumi n. sp., is described from limeston... more A new species of highly troglobitic cockroach, Nocticola baumi n. sp., is described from limestone caves of Papua Province, Indonesia. The new species is the first Nocticola reported in New Guinea island and differs from other known Nocticola spp. by the combination of the following characters: compound eyes and ocelli absent, tegmina fully developed extending beyond the abdomen, hind wings absent, legs extremely long. The discovery of the genus on New Guinea bridges the gap between Oriental and Australian distribution of the genus and stresses the unknown diversity of the genus.
The pet trade is one of the most important sources of introduction of freshwater non-native decap... more The pet trade is one of the most important sources of introduction of freshwater non-native decapod crustaceans. Precise and timely identification of potentially hazardous species is necessary for the effective prevention of new introductions. Here, we present a list of species of ornamental freshwater decapod crustaceans pet-traded in Hungary and their risk assessment, including the probability of establishment based on climate matching. The list contains 13 shrimps, eight crayfish, two crabs, and one hermit crab. Three crayfish, Cherax destructor, Procambarus clarkii, P. virginalis, and one crab, Eriocheir sinensis, were classified in the high-risk category. During field sampling, we found three individuals of C. quadricarinatus that were probably released or escaped from aquaria. These are the first records of this species in the wild of Carpathian Basin. We strongly recommend further educating hobbyists about the risks related to the escapes and releases of high-risk taxa, as we...
Journal of Crustacean Biology, 2021
The Infraorder Astacidea comprises four superfamilies of decapod crustaceans: the freshwater Asta... more The Infraorder Astacidea comprises four superfamilies of decapod crustaceans: the freshwater Astacoidea and Parastacoidea and the marine Enoplometopoidea and Nephropoidea. The gill morphology of four species of crayfishes belonging to Astacoidea and Parastacoidea, two coral reef species of Enoplometopoidea, and 2 deep-water species of Nephropoidea are described and illustrated for comparisons and to determine characters characteristic to members of the family Parastacidae (Parastacoidea) from New Guinea. Morphology of the arthrobranchs and pleurobranchs were similar among all species, having a single stem with filament, but podobranchs of the parastacoideans differed from those of Astacoidea, being corrugated and tubular and having filaments. The astacoidean P. virginalis had a plate-like lamella with filament. The two nephropoid and two enoplometopoid species were similar to each other; their podobranch had a flat blade-like lamella without a filament and a shaft with a filament. T...
Knowledge & Management of Aquatic Ecosystems, 2021
The South Caucasus (SC) region is recognized for its high biological diversity and various endemi... more The South Caucasus (SC) region is recognized for its high biological diversity and various endemic animal taxa. The area has experienced many fish introductions over the years, but the overall information about non-native fishes in the three SC countries, Armenia, Azerbaijan, and Georgia did not exist. Although these three countries belong to the Kura River drainage, Caspian Sea basin (only the western half of Georgia drains into the Black Sea), the legislative framework for each country regarding introduction of non-native fish species and their treatment is different and poorly developed. The goal of the present study was to make an initial inventory of non-native fish species in the three SC countries, and summarize the existing knowledge as a basis for future risk assessment models and formulation of regional management policies. Here, we present a unified list of 27 non-native species recorded in the wild in Armenia, Azerbaijan, and Georgia. Among these 27 species, eight were t...
Knowledge and Management of Aquatic Ecosystems, 2016
The crayfish is an interesting element of cultural history in many regions where this animal play... more The crayfish is an interesting element of cultural history in many regions where this animal plays an important role through its exploitation by humans. The present study provides comprehensive insight into the relationship between humans and crayfish within the Central European regions of Bohemia and Moravia, collectively recognized as the Czech cultural space. The study combines data obtained from Czech and Latin historical literature; archival juristic documents and codes of law; old cooking and fishing journals, books, and textbooks; digitized materials available on the internet; and specialized and scientific publications. Human exploitation of crayfish within the evaluated region has been continuous from prehistory to the present and is thus the oldest in all of Europe. Important moments are displayed on timeline.
The noble crayfish (Astacus astacus) is the most widespread indigenous crayfish species in the Cz... more The noble crayfish (Astacus astacus) is the most widespread indigenous crayfish species in the Czech Republic. Nonetheless populations of this species have been rapidly decreased by water pollution and spread of non-native crayfish plague. Presently it is classified as endangered species. Each information about endangered species distribution is very important for stakeholders and especially for conservationists. The monitoring of indigenous crayfish species in the Czech Republic has started in 1986. In 2013, one isolated unknown population was found in the garden pond near the village Bakov. Unfortunately no further information about this population was given. Therefore we present additional data describing adult population of noble crayfish on the aforementioned locality.
Nepůvodní druhy raků se ve volné přírodě často projevují invazně a závažně poškozují populace dru... more Nepůvodní druhy raků se ve volné přírodě často projevují invazně a závažně poškozují populace druhů původních a v současné době nad nimi v Evropě dominují v poměru přibližně 2:1. Největším nebezpečím je přenos račího moru, vůči kterému jsou oproti evropským rakům severoameričtí zástupci čeledí Astacidae a Cambaridae velmi odolní. V České republice je nejvíce rozšířeným severoamerickým druhem rak pruhovaný (Orconectes limosus), který osídlil hlavně povodí Labe a Vltavy a byl pravděpodobně lidmi vysazen i v rybnících a zatopených lomech a pískovnách. V pískovně Provodín II byl tento druh zjištěn v roce 2004. Cílem této studie bylo ověřit jeho výskyt a zjistit, jestli se úspěšně rozmnožuje. Odlov byl proveden v srpnu 2013 a byl odchycen juvenilní jedinec i dospělí raci obojího pohlaví.
Steadily increasing use of internet, where people search for various information in all kinds of ... more Steadily increasing use of internet, where people search for various information in all kinds of disciplines, leads to possibility of uncovering societal views and trends based on analysis of entered keywords and phrases. We used web search log data of almost 9-year period from 2006 for two key words in Czech "účes" [hairstyle] and "příroda" [nature]. Relative search volumes for both words were downloaded together from Google Trends for the the Czech Republic only. Our analysis showed increased interest in "účes" (slope = +4.2; R 2 =0.88; P˂0.01) and decreasing interest in "příroda" (slope = -2.54; R 2 =0.72; P˂0.01). The data showed yearly a regular repeating wave in search patterns for both of the search key words. We speculate that this wave patterns may reflect interest in hairstyle during a ball season peaking in January and February and interest in nature during the early spring after winter time. Further, we discuss our findings in sens...
Knowledge and Management of Aquatic Ecosystems, 2013
Knowledge and Management of Aquatic Ecosystems, 2015
Crustaceana, 2014
Humans are characterized as opportunistic omnivores with diets containing a wide range of animal ... more Humans are characterized as opportunistic omnivores with diets containing a wide range of animal proteins (Speth, 1989; Southgate et al., 1991; Dobrovolskaya, 2005). In general, the diet of prehistoric humans is reconstructed by identifying plant and animal remains found during archaeological excavations. Many previous studies have focused especially on medium and large mammals, but, as suggested by Stewart (1994), small fauna were of considerable importance in the diet.Although several previous studies have reported evidence for semi-terrestrial or mangrove crab consumption (Horwitz & Garfinkel, 1991; Charpentier & Méry, 2008; Rabett et al., 2011), Eaton (2006) pointed out that the prehistoric human diet is usually only hypothesized. Not surprisingly, this is also the case for crayfish consumption in early human history, which is based mainly on analogies such as the foraging practices and diets of certain living non-human primates (Stanford & Bunn, 2001). It is evident that decapod crustaceans are attractive prey for such primates as the crab-eater monkey Macaca fascicularis (Raffles, 1821) and tufted capuchin Cebus apella (L., 1758) (Port-Carvalho et al., 2004; Malaivijitnond et al., 2007). Moreover, present-day Australian Aborigines who live in societies very similar to those of prehistoric times often hunt for crayfish (O’Dea, 1991). Human consumption of crayfish in Europe in historical times was most likely culturally influenced. In 350 BCE, Aristotle wrote about the biology of crayfish in Historia Animalium, but he did not mention its importance for human consumption. Most likely this was because crayfish were perceived in antiquity as inedible scavengers of human cadavers (Swahn, 2004; Koutrakis et al., 2009). The crayfish is also classified as religiously ‘unclean’ food in the Bible and according to that its consumption should be avoided. The first irrefutable evidence of crayfish consumption as a food complement appeared in Europe in the 15th century CE, when the human population was expanding and exploitation of aquatic food resources was rapidly increasing (Swahn, 2004; Hoffmann, 2005). This trend continues to the present day, when more than 600 000 tonnes of crayfish are consumed annually worldwide (Holdich, 1993; FAO, 2013). As the crayfish carapace is very fragile and rapidly decaying, its preservation is unusual and hence archaeological findings of crayfish remains are very rare. While providing no detailed information, Kozlowski (1989) mentioned finding a small number of crayfish claws in a refuse pit at a Neolithic site in Northern Iraq dating to 10 150-8500 years BCE. The earliest discovered and plainly documented crayfish remains related to human consumption were dated back to the 1st century CE in North America. In that instance, carapace and claw fragments were found in a well-preserved midden (Kuehn, 2010). Here, we report the first irrefutable finding of crayfish remains from Neolithic times.
Biological Invasions, 2014
The pet trade in freshwater crustaceans, including crayfish, has grown rapidly in recent decades ... more The pet trade in freshwater crustaceans, including crayfish, has grown rapidly in recent decades and become an important pathway for introducing new non-indigenous species into Europe. This paper provides the first overview of non-indigenous crayfish species (NICS) traded as ornamental and their potential impact in the Czech Republic, which is the second leading importer into Europe. The paper presents a full list of traded crayfish species, their market availability, and trade names or misnomers used in the country. In total, 27 crayfish species from all three families are advertised and marketed, of which Astacus astacus is the only indigenous species. Only three NICS were recognized as very common on the market. The invasiveness and risk associated with ornamental crayfish trade were assessed using the Freshwater Invertebrate Invasiveness Scoring Kit. Five NICS were classified into the high-risk category, the highest score being for Procambarus fallax f. virginalis. The invasiveness of crayfish indigenous to North America is significantly greater than that of crayfish from the rest of the world, and therefore regulation in this regard is recommended.
Human Dimensions of Wildlife, Feb 13, 2023
<i>Nocticola baumi</i> n. sp. <b>Material examined:</b> <i>Holotype... more <i>Nocticola baumi</i> n. sp. <b>Material examined:</b> <i>Holotype</i>: INDONESIA • &male;; Hagepma cave, New Guinea Highlands, Jayawijaya Regency, Papua Province; 04°01.933' S, 139°00.221' E; 11-12 July 2017; Ji&rcaron;í Patoka & Martin Bláha leg., slide mounted (MZB.Orth.21847). <i>Paratypes:</i> INDONESIA • 7 adults &female;, 5 nymphs &female;, 2 nymphs &male;; same data as holotype (MZB). <b>Diagnosis:</b> Vertex weakly exposed. Eyes and ocelli absent. First antennal flagellomere distinctly longer than succeeding individual flagellomeres. Pronotum ovoid, longer than wide. Profemur Type C. Legs extremely elongate; meso- and metafemora nearly as long as the body. Genal spines minute. Tarsal claws simple, symmetrical. Pulvilli and arolium absent. Tegmina well-developed extending beyond the supra-anal plate, venations dissimilar, weak and indistinct. Hind wings absent. Abdominal tergites unspecialized. Supra-anal plate subtruncate with weak mesal indentation; cerci nearly as long as the abdomen. Subgenital plate weakly asymmetrical. The absence of specialized tergal gland places the new species to <i>simoni</i> -species group. <i>Nocticola baumi</i> <b>n. sp.</b> resembles the macropterous form of <i>Nocticola currani</i> Trotter <i>et al</i>., 2017. Specific similarities are in the fully-developed tegmina, absence of sub-apical lobe in L3 (L2d in Trotter <i>et al</i>. 2017), and recurved, sickle-like L2d (L3d in Trotter <i>et al</i>. 2017). It differs from <i>N</i>. <i>currani</i> in the absence of hind wings and eyes (present on <i>N</i>. <i>currani</i>), shape of the pronotum (longer than wide in <i>N</i>. <i>baumi</i> while wider than long in <i>N</i>. <i>currani</i>), extremely elongate legs (almost three times than that of <i>N. currani</i>), and the shape of R1 (long, paddle-shaped, and weakly sclerotized in <i>N</i>. <i>baumi</i> while short, large with heavily sclerotized caudal edge on <i>N</i>. <i>currani</i>). Among other members of cavernicolous <i>simoni</i> -species group, [...]
Diversity, 2021
Ornamental aquaculture is one of the main sources of non-native species worldwide. Unintentionall... more Ornamental aquaculture is one of the main sources of non-native species worldwide. Unintentionally transported “hitchhiking” organisms have been previously recorded; although most of these species are transported from tropical regions, here we report on the first accidental transport of the zebra mussel (Dreissena polymorpha) in a shipment of ornamental Aegagropila linnaei (Chlorophyta) from Russia to the Czech Republic. This invasive mussel is listed on the national blacklist of alien species in the Czech Republic and can be easily released in outdoor garden ponds together with A. linnaei. Since the Czech Republic is known to be a gateway for aquatic ornamental species from a European perspective, re-export to other European countries is also possible. Thus, the spread of D. polymorpha via this pathway cannot be excluded. This finding should be of importance to conservationists, traders, decision-makers and other stakeholders.
Zootaxa, 2021
A new species of highly troglobitic cockroach, Nocticola baumi n. sp., is described from limeston... more A new species of highly troglobitic cockroach, Nocticola baumi n. sp., is described from limestone caves of Papua Province, Indonesia. The new species is the first Nocticola reported in New Guinea island and differs from other known Nocticola spp. by the combination of the following characters: compound eyes and ocelli absent, tegmina fully developed extending beyond the abdomen, hind wings absent, legs extremely long. The discovery of the genus on New Guinea bridges the gap between Oriental and Australian distribution of the genus and stresses the unknown diversity of the genus.
The pet trade is one of the most important sources of introduction of freshwater non-native decap... more The pet trade is one of the most important sources of introduction of freshwater non-native decapod crustaceans. Precise and timely identification of potentially hazardous species is necessary for the effective prevention of new introductions. Here, we present a list of species of ornamental freshwater decapod crustaceans pet-traded in Hungary and their risk assessment, including the probability of establishment based on climate matching. The list contains 13 shrimps, eight crayfish, two crabs, and one hermit crab. Three crayfish, Cherax destructor, Procambarus clarkii, P. virginalis, and one crab, Eriocheir sinensis, were classified in the high-risk category. During field sampling, we found three individuals of C. quadricarinatus that were probably released or escaped from aquaria. These are the first records of this species in the wild of Carpathian Basin. We strongly recommend further educating hobbyists about the risks related to the escapes and releases of high-risk taxa, as we...
Journal of Crustacean Biology, 2021
The Infraorder Astacidea comprises four superfamilies of decapod crustaceans: the freshwater Asta... more The Infraorder Astacidea comprises four superfamilies of decapod crustaceans: the freshwater Astacoidea and Parastacoidea and the marine Enoplometopoidea and Nephropoidea. The gill morphology of four species of crayfishes belonging to Astacoidea and Parastacoidea, two coral reef species of Enoplometopoidea, and 2 deep-water species of Nephropoidea are described and illustrated for comparisons and to determine characters characteristic to members of the family Parastacidae (Parastacoidea) from New Guinea. Morphology of the arthrobranchs and pleurobranchs were similar among all species, having a single stem with filament, but podobranchs of the parastacoideans differed from those of Astacoidea, being corrugated and tubular and having filaments. The astacoidean P. virginalis had a plate-like lamella with filament. The two nephropoid and two enoplometopoid species were similar to each other; their podobranch had a flat blade-like lamella without a filament and a shaft with a filament. T...
Knowledge & Management of Aquatic Ecosystems, 2021
The South Caucasus (SC) region is recognized for its high biological diversity and various endemi... more The South Caucasus (SC) region is recognized for its high biological diversity and various endemic animal taxa. The area has experienced many fish introductions over the years, but the overall information about non-native fishes in the three SC countries, Armenia, Azerbaijan, and Georgia did not exist. Although these three countries belong to the Kura River drainage, Caspian Sea basin (only the western half of Georgia drains into the Black Sea), the legislative framework for each country regarding introduction of non-native fish species and their treatment is different and poorly developed. The goal of the present study was to make an initial inventory of non-native fish species in the three SC countries, and summarize the existing knowledge as a basis for future risk assessment models and formulation of regional management policies. Here, we present a unified list of 27 non-native species recorded in the wild in Armenia, Azerbaijan, and Georgia. Among these 27 species, eight were t...
Knowledge and Management of Aquatic Ecosystems, 2016
The crayfish is an interesting element of cultural history in many regions where this animal play... more The crayfish is an interesting element of cultural history in many regions where this animal plays an important role through its exploitation by humans. The present study provides comprehensive insight into the relationship between humans and crayfish within the Central European regions of Bohemia and Moravia, collectively recognized as the Czech cultural space. The study combines data obtained from Czech and Latin historical literature; archival juristic documents and codes of law; old cooking and fishing journals, books, and textbooks; digitized materials available on the internet; and specialized and scientific publications. Human exploitation of crayfish within the evaluated region has been continuous from prehistory to the present and is thus the oldest in all of Europe. Important moments are displayed on timeline.
The noble crayfish (Astacus astacus) is the most widespread indigenous crayfish species in the Cz... more The noble crayfish (Astacus astacus) is the most widespread indigenous crayfish species in the Czech Republic. Nonetheless populations of this species have been rapidly decreased by water pollution and spread of non-native crayfish plague. Presently it is classified as endangered species. Each information about endangered species distribution is very important for stakeholders and especially for conservationists. The monitoring of indigenous crayfish species in the Czech Republic has started in 1986. In 2013, one isolated unknown population was found in the garden pond near the village Bakov. Unfortunately no further information about this population was given. Therefore we present additional data describing adult population of noble crayfish on the aforementioned locality.
Nepůvodní druhy raků se ve volné přírodě často projevují invazně a závažně poškozují populace dru... more Nepůvodní druhy raků se ve volné přírodě často projevují invazně a závažně poškozují populace druhů původních a v současné době nad nimi v Evropě dominují v poměru přibližně 2:1. Největším nebezpečím je přenos račího moru, vůči kterému jsou oproti evropským rakům severoameričtí zástupci čeledí Astacidae a Cambaridae velmi odolní. V České republice je nejvíce rozšířeným severoamerickým druhem rak pruhovaný (Orconectes limosus), který osídlil hlavně povodí Labe a Vltavy a byl pravděpodobně lidmi vysazen i v rybnících a zatopených lomech a pískovnách. V pískovně Provodín II byl tento druh zjištěn v roce 2004. Cílem této studie bylo ověřit jeho výskyt a zjistit, jestli se úspěšně rozmnožuje. Odlov byl proveden v srpnu 2013 a byl odchycen juvenilní jedinec i dospělí raci obojího pohlaví.
Steadily increasing use of internet, where people search for various information in all kinds of ... more Steadily increasing use of internet, where people search for various information in all kinds of disciplines, leads to possibility of uncovering societal views and trends based on analysis of entered keywords and phrases. We used web search log data of almost 9-year period from 2006 for two key words in Czech "účes" [hairstyle] and "příroda" [nature]. Relative search volumes for both words were downloaded together from Google Trends for the the Czech Republic only. Our analysis showed increased interest in "účes" (slope = +4.2; R 2 =0.88; P˂0.01) and decreasing interest in "příroda" (slope = -2.54; R 2 =0.72; P˂0.01). The data showed yearly a regular repeating wave in search patterns for both of the search key words. We speculate that this wave patterns may reflect interest in hairstyle during a ball season peaking in January and February and interest in nature during the early spring after winter time. Further, we discuss our findings in sens...
Knowledge and Management of Aquatic Ecosystems, 2013
Knowledge and Management of Aquatic Ecosystems, 2015
Crustaceana, 2014
Humans are characterized as opportunistic omnivores with diets containing a wide range of animal ... more Humans are characterized as opportunistic omnivores with diets containing a wide range of animal proteins (Speth, 1989; Southgate et al., 1991; Dobrovolskaya, 2005). In general, the diet of prehistoric humans is reconstructed by identifying plant and animal remains found during archaeological excavations. Many previous studies have focused especially on medium and large mammals, but, as suggested by Stewart (1994), small fauna were of considerable importance in the diet.Although several previous studies have reported evidence for semi-terrestrial or mangrove crab consumption (Horwitz & Garfinkel, 1991; Charpentier & Méry, 2008; Rabett et al., 2011), Eaton (2006) pointed out that the prehistoric human diet is usually only hypothesized. Not surprisingly, this is also the case for crayfish consumption in early human history, which is based mainly on analogies such as the foraging practices and diets of certain living non-human primates (Stanford & Bunn, 2001). It is evident that decapod crustaceans are attractive prey for such primates as the crab-eater monkey Macaca fascicularis (Raffles, 1821) and tufted capuchin Cebus apella (L., 1758) (Port-Carvalho et al., 2004; Malaivijitnond et al., 2007). Moreover, present-day Australian Aborigines who live in societies very similar to those of prehistoric times often hunt for crayfish (O’Dea, 1991). Human consumption of crayfish in Europe in historical times was most likely culturally influenced. In 350 BCE, Aristotle wrote about the biology of crayfish in Historia Animalium, but he did not mention its importance for human consumption. Most likely this was because crayfish were perceived in antiquity as inedible scavengers of human cadavers (Swahn, 2004; Koutrakis et al., 2009). The crayfish is also classified as religiously ‘unclean’ food in the Bible and according to that its consumption should be avoided. The first irrefutable evidence of crayfish consumption as a food complement appeared in Europe in the 15th century CE, when the human population was expanding and exploitation of aquatic food resources was rapidly increasing (Swahn, 2004; Hoffmann, 2005). This trend continues to the present day, when more than 600 000 tonnes of crayfish are consumed annually worldwide (Holdich, 1993; FAO, 2013). As the crayfish carapace is very fragile and rapidly decaying, its preservation is unusual and hence archaeological findings of crayfish remains are very rare. While providing no detailed information, Kozlowski (1989) mentioned finding a small number of crayfish claws in a refuse pit at a Neolithic site in Northern Iraq dating to 10 150-8500 years BCE. The earliest discovered and plainly documented crayfish remains related to human consumption were dated back to the 1st century CE in North America. In that instance, carapace and claw fragments were found in a well-preserved midden (Kuehn, 2010). Here, we report the first irrefutable finding of crayfish remains from Neolithic times.
Biological Invasions, 2014
The pet trade in freshwater crustaceans, including crayfish, has grown rapidly in recent decades ... more The pet trade in freshwater crustaceans, including crayfish, has grown rapidly in recent decades and become an important pathway for introducing new non-indigenous species into Europe. This paper provides the first overview of non-indigenous crayfish species (NICS) traded as ornamental and their potential impact in the Czech Republic, which is the second leading importer into Europe. The paper presents a full list of traded crayfish species, their market availability, and trade names or misnomers used in the country. In total, 27 crayfish species from all three families are advertised and marketed, of which Astacus astacus is the only indigenous species. Only three NICS were recognized as very common on the market. The invasiveness and risk associated with ornamental crayfish trade were assessed using the Freshwater Invertebrate Invasiveness Scoring Kit. Five NICS were classified into the high-risk category, the highest score being for Procambarus fallax f. virginalis. The invasiveness of crayfish indigenous to North America is significantly greater than that of crayfish from the rest of the world, and therefore regulation in this regard is recommended.