Sinotaia quadrata Temporal range: Upper Pleistocene [1] -recent | |
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Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Gastropoda |
Subclass: | Caenogastropoda |
Order: | Architaenioglossa |
Family: | Viviparidae |
Genus: | Sinotaia |
Species: | S. quadrata |
Binomial name | |
Sinotaia quadrata (Benson, 1842) | |
Synonyms | |
List
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Sinotaia quadrata is a species of a freshwater snail with a gill and an operculum, an aquatic gastropod mollusk in the family Viviparidae. It is widely distributed and common species in China and in northern Vietnam inhabiting various shallow freshwater habitats, where it can reach high densities. It is a keystone species in its habitat and can significantly affect water quality and phytoplankton communities. It is commonly used in Chinese cuisine.
This species was described under the name Paludina quadrata by English conchologist William Henry Benson in 1842. It is now classified in the genus Sinotaia , although Chinese malacologists use the synonym Bellamya aeruginosa .
Two subspecies are recognised: [3]
This species is found in:
This species is also known from Upper Pleistocene of China. [1] The species' distribution appears to have shrunk from the Middle Pleistocene to the Late Pleistocene, while a range expansion occurred in the Holocene. [7]
It is one of the most common species in China. [8] It is common in the Yangtze River and Yellow River basins. [7] The distribution of S. quadrata includes East China (Anhui, Fujian, Jiangsu, Jiangxi, Shandong, Shanghai, Zhejiang), Northeast China (Heilongjiang, Jilin, Liaoning), North China (Beijing, Hebei, Inner Mongolia, Shanxi, Tianjin), Northwest China (Ningxia, Shaanxi), Central China (Henan, Hubei, Hunan), Southwest China (Chongqing, Guizhou, Sichuan, Yunnan) and South China (Guangdong, Guangxi, Hainan). [2] In Vietnam it is also common, but rarely reaches very high population densities. [9]
Sinotaia quadrata is found in rivers and lakes. [10] It inhabits rice paddies, lakes, pools, slow flowing rivers, streams, ditches, ponds, and canals called khlongs in Vietnam. [2] [11] It has a benthic lifestyle and lives mainly in shallow littoral areas, [12] usually in soft mud rich in organic matter. [11] It can actively glide over the sediment or bury into it. [13] This species is not actively migrating, rather its dispersal appears to be caused passively by floods, animals (zoochory), and accidentally by humans. [7] The species prefers water temperatures typical of subtropical habitats, e.g., 6 to 30.1 °C (42.8 to 86.2 °F) in Lake Tai. [13]
Populations can reach densities of up to 400 snails/m2. [11] In Chao Lake, it is the dominant gastropod species with an abundance 2-128 snails/m2 and an average biomass of 87.5 g/m2. [14] It is similarly dominant in Lake Tai. [15]
S. quadrata has been found to respond well to laboratory conditions with a water temperature of 24 °C, pH 8 and a 1:4 ratio of sediment to water. [11]
Populations of S. quadrata at high densities are able to alter the physicochemical features of water. They decrease the concentration of chlorophyll a and thus directly increase water transparency. This indirectly decreases the concentration of dissolved oxygen through consumption of oxygen-producing algae. [12] The species affects the composition of the phytoplankton community by decreasing the biomass of mostly toxic cyanobacteria and flagellates and promoting the biomass of mostly colonial green algae. [16] [12] Nitrogen concentrations may also be decreased. [16] Its pronounced effect on water chemistry and community composition makes S. quadrata a keystone species in its habitat. [8]
The pollution tolerance value is 6 (on scale 0–10; 0 is the best water quality, 10 is the worst water quality). [17]
S. quadrata breathes with gills. The right tentacle is thickened in the male but not the female. [11] The dry weight of composition of this species is as follows: 28.6% foot, 23.06% intestine, 9.78% gonad, 8.58% hepatopancreas, 29.98% other tissue. [18] The diploid chromosome number of Sinotaia quadrata is 2n=16. [19]
The height of the shell is 20–30 mm (0.79–1.18 in), with both sexes having identical shell dimensions. Adults snails have shell of greater height than width. The shells of newborn snails are 2.93–3.70 mm (0.115–0.146 in) long, and differ from those of adults in being wider than high. [11] The snail including the shell has a weight of about 2.8 g. [16]
Sinotaia quadrata feeds on epiphytic algae. [10]
Sinotaia quadrata histrica snails predate also on eggs of bluegill Lepomis macrochirus. [20]
S. quadrata is a herbivorous deposit feeder. [11] [21] It consumes mainly epiphytic algae, [22] but its diet also includes detritus, bacteria, [11] aquatic plants, [21] sand grains, diatoms, green algae, [23] and cyanobacteria such as Microcystis . [24] Its consumption of cyanobacteria during algal blooms may result in bioaccumulation of toxic microcystins (microcystin-LR, microcystin-RR) from Microcystis in the gonads, the hepatopancreas and the digestive tract. [24] Adult snails feeding ad libitum under ideal laboratory conditions eat 16.0 mg of fish food daily. [11]
Sinotaia quadrata has strong fecundity. [10] It is gonochoristic, which means that each individual animal is distinctly male or female. [7] The species is ovoviviparous. [21] Newborn snails attach to non-sediment substrates (shells of adults or other material) in their first 2–3 days. [11]
The shell length of juvenile snails starts at about 3 mm and grows rapidly by about 190 μm daily. Juveniles become adults at the age of nine weeks, when they reach a shell height of 12.15–16.09 mm; from then on, they grow more slowly at about 30 μm daily. Snails can be reliably sexed at this age. [11]
Individuals start mating and reproducing in at water temperatures of 16–18 °C, although a temperature of 24–26 °C is optimal. Females start to give birth to the first newborn snails at the age of 18 weeks, when they reach a shell height of 15–16 mm and a body weight of 0.81–0.94 g. [11] [21] Gravidity of adult females lasts the entire year. [11] The average number of newborn snails in the wild is 0.24 snails per day (50 per year) [11] [21] or up to 0.55 snails per day in the laboratory. [11] Each gravid female carries 19–21 embryos inside her. [11]
Generation time is quite short at about four months. [7] [11] The species can have three generations per year in the aquarium. [11] The reproductive cycle is about six months. [21]
S. quadrata has been the subject of various aquatic toxicology studies into the effects of copper, [11] [25] cadmium, [26] lead, [27] ethylbenzene, [28] 2,2',4,4'- tetrabromodiphenyl ether, [26] [29] tributyltin, [30] microcystin, [31] multi-walled carbon nanotubes, [32] and 17β-estradiol. [33] The species has a high sensitivity to copper exposure and could thus be used for monitoring of sediment toxicity caused by environmental copper pollution. [11]
Sinotaia quadrata snails from West Lake in Hanoi, Vietnam were found to be contaminated with copper, lead and zinc. [34] The concentration of these elements in these snails exceeded standards of Food and Drug Administration and of Food Standards Australia New Zealand. [34]
Distribution of rare-earth elements was studied in a labolatory. Results shown bioaccumulation of lanthanum, samarium, gadolinium and yttrium in Sinotaia quadrata and there was found no bioaccumulation of cerium in this snail. [35]
The species' population trend is unknown, [2] but population sizes are mostly large. [7] Water pollution and sedimentation are threats to local populations, [2] while more general threats include habitat fragmentation by damming and habitat destruction. [7] The genetic diversity of this species was found to be high in China. [7] S. quadrata is currently classified as Least Concern by the IUCN. [2]
Parasites of Sinotaia quadrata include trematode Aspidogaster conchicola . [36]
S. quadrata serves as an intermediate host for Angiostrongylus cantonensis [37] [38] and for Echinochasmus fujianensis . [39]
Predators of the species include the black carp Mylopharyngodon piceus; S. quadrata is one of the main food sources for this fish, making it important in the freshwater food chain. [11]
Nutritional value per 100 g (3.5 oz) | |
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2.07 g [40] | |
Threonine | 3.416 g [40] |
Isoleucine | 2.447 g |
Leucine | 5.910 g |
Lysine | 4.201 g |
Methionine | 1.293 g |
Cystine | 1.477 g |
Phenylalanine | 2.401 g |
Tyrosine | 3.232 g |
Valine | 2.262 g |
Arginine | 5.171 g |
Histidine | 1.339 g |
Alanine | 3.970 g |
Aspartic acid | 7.387 g |
Glutamic acid | 11.588 g |
Glycine | 3.878 g |
Proline | 2.170 g |
Serine | 3.186 g |
Other constituents | Quantity |
Water | 78.34 g [40] |
Crude fat | 0.78 g [40] |
Crude protein | 14.43 g [40] |
Crude ash | 4.38 g [40] |
†Percentages estimated using US recommendations for adults, [41] except for potassium, which is estimated based on expert recommendation from the National Academies. [42] |
Sinotaia quadrata is common animal food used in aquaculture to feed fish black carp [43] in China. [10]
This species is also eaten by humans. In Isan, Thailand they are collected by hand or with a handnet from canals, swamps, ponds and flooded rice paddy fields during the rainy season. During the dry season, snails live under dried mud. Collectors use a spade to scrape the ground to find and catch them. Generally they are collected by both men and women. [4] The snails are then cleaned and cooked in a curry. They are also parboiled in salted water and eat together with green papaya salad. [4] S. quadrata is commonly sold in markets and restaurants in China [44] and constitutes one of the three predominant freshwater snails found in Chinese markets, [38] where it is considered a delicacy. [18] The species is also used as feed in crab culture [24] as well as fish, poultry and livestock raising. [2] The annual production of S. quadrata in Chao Lake in 2002 amounted to 28 084 t. [24] Although harvesting pressure in China is high, the high genetic diversity suggests that the species is currently not negatively affected by it. [7]
Cyprinidae is a family of freshwater fish commonly called the carp or minnow family, including the carps, the true minnows, and their relatives the barbs and barbels, among others. Cyprinidae is the largest and most diverse fish family, and the largest vertebrate animal family overall, with about 3,000 species; only 1,270 of these remain extant, divided into about 200 valid genera. Cyprinids range from about 12 mm (0.5 in) in size to the 3 m (9.8 ft) giant barb. By genus and species count, the family makes up more than two-thirds of the ostariophysian order Cypriniformes. The family name is derived from the Greek word kyprînos.
Microcystins—or cyanoginosins—are a class of toxins produced by certain freshwater cyanobacteria, commonly known as blue-green algae. Over 250 different microcystins have been discovered so far, of which microcystin-LR is the most common. Chemically they are cyclic heptapeptides produced through nonribosomal peptide synthases.
Clonorchis sinensis, the Chinese liver fluke, is a liver fluke belonging to the class Trematoda, phylum Platyhelminthes. It infects fish-eating mammals, including humans. In humans, it infects the common bile duct and gall bladder, feeding on bile. It was discovered by British physician James McConnell at the Medical College Hospital in Calcutta (Kolkata) in 1874. The first description was given by Thomas Spencer Cobbold, who named it Distoma sinense. The fluke passes its lifecycle in three different hosts, namely freshwater snail as first intermediate hosts, freshwater fish as second intermediate host, and mammals as definitive hosts.
Cyanotoxins are toxins produced by cyanobacteria. Cyanobacteria are found almost everywhere, but particularly in lakes and in the ocean where, under high concentration of phosphorus conditions, they reproduce exponentially to form blooms. Blooming cyanobacteria can produce cyanotoxins in such concentrations that they can poison and even kill animals and humans. Cyanotoxins can also accumulate in other animals such as fish and shellfish, and cause poisonings such as shellfish poisoning.
Aphanizomenon flos-aquae is a brackish and freshwater species of cyanobacteria of the genus Aphanizomenon found around the world, including the Baltic Sea and the Great Lakes.
Viviparidae, sometimes known as the river snails or mystery snails, are a family of large aquatic gastropod mollusks, being some of the most widely distributed operculate freshwater snails.
The Chinese mystery snail, black snail, or trapdoor snail, is a large freshwater snail with gills and an operculum, an aquatic gastropod mollusk in the family Viviparidae. The Japanese variety of this species is black and usually a dark green, moss-like alga covers the shell.
Cipangopaludina is a genus of freshwater snails with a gill and an operculum, aquatic gastropod mollusks in the family Viviparidae.
The Jehol Biota includes all the living organisms – the ecosystem – of northeastern China between 133 and 120 million years ago. This is the Lower Cretaceous ecosystem which left fossils in the Yixian Formation and Jiufotang Formation. These deposits are composed of layers of tephra and sediment. It is also believed to have left fossils in the Sinuiju series of North Korea. The ecosystem in the Lower Cretaceous was dominated by wetlands and numerous lakes. Rainfall was seasonal, alternating between semiarid and mesic conditions. The climate was temperate. The Jehol ecosystem was interrupted periodically by ash eruptions from volcanoes to the west. The word "Jehol" is a historical transcription of the former Rehe Province.
Angiostrongylus cantonensis is a nematode (roundworm) parasite that causes angiostrongyliasis, an infection that is the most common cause of eosinophilic meningitis in Southeast Asia and the Pacific Basin. The nematode commonly resides in the pulmonary arteries of rats, giving it the common name rat lungworm. Snails are the primary intermediate hosts, where larvae develop until they are infectious.
Pomacea canaliculata, commonly known as the golden apple snail or the channeled apple snail, is a species of large freshwater snail with gills and an operculum, an aquatic gastropod mollusc in the family Ampullariidae, the apple snails. South American in origin, this species is considered to be in the top 100 of the "World's Worst Invasive Alien Species". It is also ranked as the 40th worst alien species in Europe and the worst alien species of gastropod in Europe.
Bellamya is a genus of freshwater snails with a gill and an operculum, aquatic gastropod mollusks in the family Viviparidae.
The Japanese white crucian carp, also known as Japanese carp, white crucian carp, or gengoro-buna, is a species of freshwater fish in the carp family. It is found in Japan and, as an introduced species, in several other countries in Asia. This fish is closely related to the commonly known goldfish.
Microcystin-LR (MC-LR) is a toxin produced by cyanobacteria. It is the most toxic of the microcystins.
Microcystis is a genus of freshwater cyanobacteria that includes the harmful algal bloom-forming Microcystis aeruginosa. Many members of a Microcystis community can produce neurotoxins and hepatotoxins, such as microcystin and cyanopeptolin. Communities are often a mix of toxin-producing and nonproducing isolates.
Microcystis aeruginosa is a species of freshwater cyanobacteria that can form harmful algal blooms of economic and ecological importance. They are the most common toxic cyanobacterial bloom in eutrophic fresh water. Cyanobacteria produce neurotoxins and peptide hepatotoxins, such as microcystin and cyanopeptolin. Microcystis aeruginosa produces numerous congeners of microcystin, with microcystin-LR being the most common. Microcystis blooms have been reported in at least 108 countries, with the production of microcystin noted in at least 79.
Sinotaia is a genus of large operculate freshwater snails, aquatic gastropod mollusks in the family Viviparidae.
Cipangopaludina cathayensis is a species of large, freshwater snail with an operculum and a gill, an aquatic gastropod mollusk in the family Viviparidae, the river snails.
Angulyagra polyzonata is a species of a freshwater snail with a gill and an operculum, an aquatic gastropod mollusk in the family Viviparidae.
Susanna Wood is a New Zealand scientist whose research focuses on understanding, protecting and restoring New Zealand's freshwater environments. One of her particular areas of expertise is the ecology, toxin production, and impacts of toxic freshwater cyanobacteria in lakes and rivers. Wood is active in advocating for the incorporation of DNA-based tools such as metabarcoding, genomics and metagenomics for characterising and understanding aquatic ecosystems and investigating the climate and anthropogenic drivers of water quality change in New Zealand lakes. She has consulted for government departments and regional authorities and co-leads a nationwide programme Lakes380 that aims to obtain an overview of the health of New Zealand's lakes using paleoenvironmental reconstructions. Wood is a senior scientist at the Cawthron Institute. She has represented New Zealand internationally in cycling.
This article incorporates CC-BY-2.0 text from reference. [4]
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