Pomacea canaliculata

Pomacea canaliculata
Five views of a shell of Pomacea canaliculata, Shell diameter 8 cm (3+1⁄4 in)
Conservation status
Least Concern  (IUCN 3.1)[1]
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Caenogastropoda informal group Architaenioglossa
Superfamily:	Ampullarioidea
Family:	Ampullariidae
Genus:	Pomacea
Subgenus:	Pomacea
Species:	P. canaliculata
Binomial name
Pomacea canaliculata (Lamarck, 1819)

Pomacea canaliculata,

The native distribution of P. canaliculata is basically tropical and subtropical,[4] including Argentina, Bolivia, Paraguay, Uruguay, and Brazil.^[5] The southernmost record for the species is Paso de las Piedras reservoir, south of the Buenos Aires province, Argentina.^[6]

Non-indigenous distribution

This species also occurs in the United States, where the initial introductions were probably from aquarium release, aka "aquarium dumping". The non-indigenous distribution includes:

The species has been found in China since 1981.[12] Its initial point of distribution in China was Zhongshan city.^[13]

The species has been found in Chile since 2009 with a restricted distribution.^[14]

The species has also been found in the Philippines, Japan, Korea, Taiwan, Vietnam, Cambodia, Laos, Papua New Guinea, parts of Indonesia and Malaysia, Singapore, and Guam. In 1980, the apple snail was introduced to south-east Asia as a food item and aquarium pet. First, it was introduced to Taiwan, then Japan, then Thailand and the Philippines. Instead of catching on, snails were released or escaped and have become a major agricultural pest.^[15]

Samples taken 3 December 2020 in

The size of the shell is up to 150 millimetres (6 in) in length.[11]

Ecology

Habitat

This species lives in freshwater lake, river, pond and swamp habitats and tolerates a wide range of temperatures.^[18] In natural settings, they rely on grasses and other emergent vegetation growing along the perimeter of bodies of water to lay their eggs. Where invasive, they can utilize crops such as rice and taro as a substrate for reproduction.^[19]

Feeding habits

Pomacea canaliculata is extremely

This species negatively impacts rice and taro agriculture worldwide where it has been introduced.^[11]

Life cycle

In temperate climates, the egg-laying period of this species extends from early spring to early fall.^[21] while in tropical areas reproduction is continuous. The duration of the reproductive period of P. canaliculata decreases with latitude, to a minimum of six months in the southern limit of its natural distribution.^[6] Adult females oviposit on emergent vegetation at night, but will also lay their eggs on rocks and manmade surfaces like boats. Once laid, the eggs take approximately two weeks to hatch, during which time the bright pink or orange coloration of the eggs fades.^[22]

First direct evidence (of all animals), that proteinase inhibitor from eggs of Pomacea canaliculata interacts as trypsin inhibitor with protease of potential predators, has been reported in 2010.^[23]

Predators

The snail kite, Rostrhamus sociabilis, is a predator of this species in South America. The fire ant, Solenopsis geminata, has also been observed to prey upon this species.^[24]

Parasites

Approximately 1% of the Pomacea canaliculata on sale on local markets in

Crude cyclotide extracts from both Oldenlandia affinis and Viola odorata plants showed molluscicidal activity comparable to the synthetic molluscicide metaldehyde.^[26] Because submerging developing eggs below the water reduces hatching success, manipulating the water level in agricultural fields and dammed reservoirs may provide a tool for controlling invasive populations.^[22]

Human use

This species is edible. Pomacea canaliculata constitutes one of the three predominant freshwater snails found in Chinese markets.^[27] In China and Southeast Asia, consumption of raw or undercooked snails of Pomacea canaliculata and other snails is the primary route of infection with Angiostrongylus cantonensis causing angiostrongyliasis.^[25]

In Isan, Thailand these snails are collected and consumed. They are picked by hand or with a hand-net from canals, swamps, ponds, and flooded paddy fields during the rainy season. During the dry season when these snails are concealed under dried mud, collectors use a spade to scrape the mud in order to find them. The snails are usually collected by women and children.^[28] After collection, the snails are cleaned and parboiled. They are then taken out of their shells, cut, and cleaned in salted water. After rinsing with water, they are mixed with roasted rice, dried chili pepper, lime juice, and fish sauce, and then eaten.^[28]

Some French restaurants are trying to use Pomacea canaliculata as an alternative to escargot.^[29] After boiling, remove Pomacea canaliculata guts and eggs.  Washing only the muscular body with vinegar will eliminate the odor. As a result, it can be used as an alternative to escargot.^[30]

Pomacea canaliculata has displaced some of the indigenous rice field

In some paddy fields in Japan, Pomacea canaliulata is used to control weeds by allowing the snail to eat them. However, this method runs risk of the snails also eating young rice plants, and of spreading to nearby fields and waterways as an invasive pest.^[33][34][35]

It is a part of the ornamental

• Keong Emas
• Ovorubin
• Perivitellin-2

References

This article incorporates public domain text from reference^[11] and CC-BY-2.0 text from reference^[28] and CC-BY-2.5 text from reference.^[25]