Dog wing snail

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Dog wing snail
Housing of Laevistrombus canarium canarium

Housing of Laevistrombus canarium canarium

Systematics
Subordination : Hypsogastropoda
Partial order : Littorinimorpha
Superfamily : Stromboidea
Family : Strombidae
Genre : Laevistrombus
Type : Dog wing snail
Scientific name
Laevistrombus canarium
( Linnaeus , 1758)
Enclosure of Strombus canarium , from Index Testarum Conchyliorum , 1742

The dog wing snail ( Laevistrombus canarium , syn .: Strombus canarium ) is a snail from the family of the wing snail (genus Laevistrombus ), which is widespread in the Indo-Pacific .

features

The inverted egg-shaped snail shell of Laevistrombus canarium , which in adult snails reaches a length of about 6.5 cm, sometimes up to 10 cm, has a short, pointed thread, leveled at the base, and a very short, wide siphon channel. The outer lip is thick, extensive, smooth, and devoid of any tips, projections, or appendages. It only has a very shallow, barely formed Stromboid notch. The surface of the case is white to yellowish brown with dense red to brown, wavy axially running lines, the mouth is white on the inside and often golden yellow on the outside.

The dog's winged snail moves like other winged snails with the help of its claw-shaped, horny operculum . This sinks her into the substrate and then suddenly contracts her foot.

distribution and habitat

The dog wing snail occurs in the eastern Indian Ocean and western Pacific Ocean , from Sri Lanka and southern India to Melanesia , from Japan to Queensland ( Australia ) and New Caledonia .

The snail is very common on muddy sand and algae-rich grounds on larger islands and on the shores of the continent. It lives in deeper areas of the intertidal zone and below to a depth of about 55 meters. Like other wing snails, it feeds on algae .

Life cycle

Like other winged snails, the dog winged snail is sexually separated, with the females being significantly larger than the males. In the period from late November to early March, the males mate the females with their penis . After copulation and fertilization, the female lays a long gelatinous string with up to 70,000 eggs, which rolls up and forms a creamy-white egg mass. Usually this clutch is attached to an aquatic plant. The eggs develop into a Veliger larva within about 110 to 130 hours , which then hatch over a period of about 12 to 15 hours. At this point in time, according to studies in Malaysia , the larva has an approximately 217 μm large housing with one and a half turns. The larvae can be successfully fed with the calcareous alga Isochrysis galbana in the aquarium . The pelagic phase of the Veliger, during which 4 developmental stages are carried out, takes about 17 to 23 days until metamorphosis occurs. Natural substrate (sand) and potassium chloride must be present so that this can be triggered. If a larva does not have the opportunity to metamorphose, it dies. Freshly metamorphosed snails have an approximately 1 mm long, light brown, smooth, translucent shell with at least 4 whorls without sculpting.

According to studies in Malaysia, males reach sexual maturity with a housing length of about 5.4 cm and females about 5.9 cm. It is estimated that females live to be around 2 years old and males around 2.5 years old.

Enemies

Important enemies of the dog wing snail are roller snails ( Cymbiola nobilis and the melon snail Melo melo ), snail-eating cone snails ( Weber cone Conus textile ) and rays .

Use and hazard

Laevistrombus canarium is collected because of the case, which is sold as jewelry. The meat is eaten and also traded. In the Philippines , the snail shells are traditionally used to weigh down fishing nets.

By overfishing the stocks of the worm are threatened in many areas.

Individual evidence

  1. ^ C. Brüggemann (1838): The natural history in faithful illustrations and with a detailed description of the same. Eduard Eisenach publisher, Leipzig 1838. Die Weichthiere, p. 77. The humpbacked winged snail . Strombus Canarium L.
  2. ↑ Carolus Linnaeus : Systema Naturae. 10th ed., Lars Salvius: Stockholm 1758, p. 742, 289. Strombus , p. 745, 438. Voluta Musica. S. testae labro rotundato brevi retuso, spiraque laevi. Habitat in O. Asiae.
  3. ↑ Zaidi Che Cob1, Aziz Arshad, Mazlan Abd. Ghaffar, Japar Sidik Bujang, Wan Lotfi Wan Muda (2009): Development and Growth of Larvae of the Dog Conch, Strombus canarium (Mollusca: Gastropoda), in the Laboratory (PDF; 614 kB) . Zoological Studies 48 (1), pp. 1-11.
  4. ↑ Aziz Arshad (2008): Sexual Maturity and Sex Determination In Strombus Canarium Linnaeus, 1758 (Gastropoda: Strombidae) . Journal of Biological Sciences 8 (3), pp. 616-621
  5. ↑ a b c Z.C. Cob, A. Arshad, JS Bujang and MA Ghaffar (2009): Age, Growth, Mortality and Population Structure of Strombus canarium (Gastropoda: Strombidae): Variations in Male and Female Sub-Populations . Journal of Applied Sciences 9, pp. 3287-3297.
  6. ↑ Kohn, AJ; Waters. V. (1966). Escape responses of three herbivorous gastropods to the predatory gastropod Conus textile . Animal Behavior (Elsevier) 14 (2-3), pp. 340-345.

Web links

Commons : Laevistrombus canarium  - collection of images, videos and audio files