Abalone in fiji

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Abalone in fiji

Abalones are marine snails that live in oceans, shores or rocky parts of the sea. Different species of abalones reside in different parts of the earth. Abalones are known for their colourful shells and flesh. People like to eat them cooked and even raw. The Red abalone currently holds the title as the biggest abalone there is in the whole world.

These abalones can be found in places such as Canada, Mexico and California. However, a lot of them are mainly in California. They are considered as big because their shells can reach up to 31 cm.

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Moreover, they are very thick and also tough. They are shaped like a dome and naturally red.

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Other than that, there are small holes on the shells at the amount of three or four. These holes help them to breathe. These creatures do not contain poison.

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They cannot harm since they have no teeth and they cannot sting either. The Red abalones are actually quiet creatures. Besides being famous for being the largest abalone, they are also famously known for their tasty meat.

Red abalones are farmed for commercial purposes especially for food. Similar to the Red abalones, the White abalones population are mostly in California and Mexico.

However, their population is small. Their shells are oval with up to 5 holes. Furthermore, their size can reach 25 cm. For colours, they are yellow with a shade of green and others are also beige.

These sea snails are also very well known for their meat as they are tender and gives off a lot of flavour in comparison to other Types of Abalone. Various reasons that contribute to their status include overfishing and insufficient numbers of adult White abalones. However, efforts are continuously made to recover their population. The Black abalones are mostly distributed on the United States, specifically the Pacific coast.South Pacific.

abalone in fiji

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abalone in fiji

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15 Types of Abalone – Characteristics

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Mollusks are world wide and predominantly marine. They have a soft body surrounded by a mantle, an anterior head and a large muscular foot.

Mollusks are best known for their beautifully formed and colored calcareous shell secreted by the mantle.

The abalone join other snails, whelks and sea slugs in the class Gastropoda. Members of this class have one shell, as opposed to clams with two, or the shell may be lacking altogether, as in the sea slugs.

The spiral structure, so common in snail shells, is flattened in the abalone and may be obscured by fouling and shell boring organisms. Abalone are members of the family Haliotidae and the genus haliotis, which means sea ear, referring to the flattened shape of the shell. The name abalone is probably derived from the Spanish-American word aulon or aulone.

Anatomy of an Abalone with Shell Removed. The internal organs are arranged around the foot and under the shell. The most conspicuous organ, the crescent-shaped gonad, is gray or green in females and cream colored in males. It extends around the side opposite the pores and to the rear of the abalone.

The abalone has a pair of eyes, a mouth and an enlarged pair of tentacles. Inside the mouth is a long, file-like tongue called the radula, which scrapes algal matter to a size that can be ingested. Click on the link to read some information about Red Abalone.

Reproduction The sexes are separate and can be distinguished in individuals as small as one inch when the gonads begin to develop. The eggs or sperm are released through the pores with the respiratory current.

This is known as broadcast spawning. Spawning may be controlled by the water temperature or length of the day. The presence of eggs and sperm in the water may stimulate other abalone to spawn, thus increasing the chances of fertilization. The egg hatches as a microscopic, free living larvae. It drifts with the currents for about a week, then the abalone larvae settles to the bottom, sheds its swimming hairs cilia and begins to develop the adult shell form. If suitable habitat is located it may grow to adulthood.

Hybrid abalone are not uncommon in areas where several species occur together. All species can hybridize, but the most common hybrids are red and white with pink.This economically important species is highly utilised and has a high market value. It is therefore one of the most sought-after invertebrates in the country.

Haliotis midae is one of five South African endemic abalone species. The others are Haliotis parvaH. They are marine snails that are associated with rocky areas. Haliotis midae has a flattened, ear-shaped shell with a wide opening at the base — unlike their terrestrial snail cousins that have spiral shells Attwood It also has a row of small holes through which water escapes after aerating the gills.

South African abalone has a muscular foot running along the wide open base Lyons The shell covers the dorsal part of the body leaving some fleshy parts protruding from the side. They are the biggest abalones of the five indigenous species, growing to mm in size Van der Merwe Males and females can be told apart by looking at their gonads reproductive parts ; males have cream-coloured gonads while females have green-coloured gonads Visser-Roux Similar to terrestrial snails, South African abalone moves by creating a series of wave-like movements across the muscular foot, which propels them forward.

They also use the foot for gripping on rocks Attwood South African abalone has a wide but patchy distribution. It is distributed along the coast of Port St. South African abalone is generally found in shallow coastal waters and seems to prefer rocky surroundings Van der Merwe Juvenile abalone associate themselves with sea urchins, Parechinus angulosuswhich they depend upon for protection Slabbert Abalones in general are herbivorous Makhande and feed mainly on kelp and red- and green algae.

They catch floating or overhanging kelp by raising the front part of their body and extending the far end of their foot Cloete Floating, overhanging kelp or algae that come into contact with the foot are trapped and fed on Cloete If a large enough kelp is caught then the neighbours also join in and feed.

Abalone farming usually alternates sea weeds with synthetic food as food sources Francis et al. Reproduction in abalone is dioecious — that is, it occurs between male and female Makhande During spawning males and females release reproductive cells through small breathing holes Cloete As male and female reproductive cells interact, fertilisation takes place.

Wood and Buxton showed that the breeding season of South African abalone is between March and October, with spawning peaking between April and June. Temperatures have a large impact on larval development. High temperatures are associated with prevention or even termination of larval development, while low temperatures are associated with longer duration of the larval stage.

After fertilisation, abalone goes through different developmental stages. At the juvenile stage, South African abalones start looking for areas where they can settle and be safe Visser-Roux This can range from rocky areas to patching themselves to sea urchins until their shells become strong enough to protect them from most predators.

According to SteinbergSouth African abalones are believed to live up to 30 years. South African abalones live in groups.Other common names are ear shellssea earsand muttonfish or muttonshells in Australia, ormer in the UKperlemoen in South Africaand paua in New Zealand. Abalone are marine snails.

Their taxonomy puts them in the family Haliotidae, which contains only one genus, Haliotiswhich once contained six subgenera. These subgenera have become alternate representations of Haliotis. The most comprehensive treatment of the family considers 56 species valid, with 18 additional subspecies.

The shells of abalones have a low, open spiral structure, and are characterized by several open respiratory pores in a row near the shell's outer edge. The thick inner layer of the shell is composed of nacre mother-of-pearlwhich in many species is highly iridescentgiving rise to a range of strong, changeable colors, which make the shells attractive to humans as decorative objects, jewelry, and as a source of colorful mother-of-pearl.

The flesh of abalones is widely considered to be a desirable food, and is consumed raw or cooked by a variety of cultures. The shell of abalones is convexrounded to oval in shape, and may be highly arched or very flattened. The shell of the majority of species has a small, flat spire and two to three whorls.

abalone in fiji

The last whorl, known as the body whorlis auriformmeaning that the shell resembles an ear, giving rise to the common name "ear shell". Haliotis asinina has a somewhat different shape, as it is more elongated and distended. The shell of Haliotis cracherodii cracherodii is also unusual as it has an ovate form, is imperforateshows an exserted spire, and has prickly ribs. A mantle cleft in the shell impresses a groove in the shell, in which are the row of holes characteristic of the genus.

These holes are respiratory apertures for venting water from the gills and for releasing sperm and eggs into the water column. They make up what is known as the selenizonewhich forms as the shell grows.

This series of eight to 38 holes is near the anterior margin. Only a small number is generally open. The older holes are gradually sealed up as the shell grows and new holes form.

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Each species has a typical number of open holes, between four and 10, in the selenizone. An abalone has no operculum. The aperture of the shell is very wide and nacreous. The exterior of the shell is striated and dull.

The color of the shell is very variable from species to species, which may reflect the animal's diet. The animal has fimbriated head lobes and side lobes that are fimbriated and cirrated.This app is a life saver and it's easy to use.

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