QUIZ 116 - 25/4 (solution)
Squids are coming under the order
Teuthoidea
Dentalioida
Myoida
Pterioidea
.jpg) |
| source - wikipedia |
Squids are a type of marine cephalopod mollusk that belong to the order Teuthida. They are characterized by their elongated, torpedo-shaped bodies, which are covered in soft, flexible skin. Their bodies are usually cylindrical, with a pointed tail fin at one end and a funnel-shaped siphon at the other.
Squids have eight arms and two longer tentacles, which are used for capturing prey. These arms and tentacles are lined with suckers or hooks that help them to grasp onto their prey. They are also equipped with a beak-like mouth and a radula, which is a tongue-like organ covered in tiny, sharp teeth.
Squids are found in oceans all over the world, from the polar regions to the tropics. They are capable of swimming at high speeds and are known for their ability to change color and pattern to camouflage themselves or communicate with other squid. Squids are also known for their ability to release ink as a defensive mechanism.
Squids are an important food source for many marine predators, including whales, sharks, dolphins, and seabirds. They are also harvested by humans for food and other products, such as ink and fertilizer. Squid is a popular seafood item in many parts of the world and is often used in dishes such as calamari, sushi, and stir-fries.
In addition to their ecological and economic importance, squids are also studied by scientists for their unique anatomy, behavior, and physiology. They are a model organism for research in neurobiology, because of their large, complex nervous systems. Squids are also used in medical research and drug discovery, as they produce a range of bioactive compounds that have potential therapeutic applications.
Giant clams are coming under the family ___________ and order ___________
Ostreidae, Pterioidea
Pectinidae, Pectinoida
Mytilidae, Mytiloida
Tridacnidae, Veneroida
.jpg) |
| source - wikipedia |
Giant clams are a group of large, colorful bivalve mollusks that belong to the family Tridacnidae and the order Veneroida. There are several species of giant clams, including the Tridacna gigas, which is the largest bivalve in the world and can grow up to 4 feet long and weigh over 500 pounds.
Giant clams are found in shallow, tropical waters throughout the Indo-Pacific region, including the Great Barrier Reef, the Coral Triangle, and the Philippines. They are known for their strikingly colored mantle tissues, which can range from bright blue and green to golden brown and purple. These colors are produced by symbiotic algae that live within the giant clam's tissues and provide it with nutrition through photosynthesis.
Giant clams are filter feeders, meaning they obtain their food by filtering water through their gills and extracting small organisms, such as plankton and bacteria. They are also capable of photosynthesis, which allows them to produce their own food when sunlight is available. Giant clams can form symbiotic relationships with certain types of algae, which provide them with additional nutrition and help them to grow faster.
Giant clams are important reef-building organisms, as they play a key role in the formation and maintenance of coral reefs. Their shells provide habitat for a wide range of marine organisms, and their filter feeding helps to maintain water quality and nutrient cycling on the reef.
Giant clams are highly valued for their meat and shells. In some parts of the world, they are considered a delicacy and are harvested for food. Their shells are also used for decorative purposes and as a source of mother-of-pearl.
Because of their ecological and economic importance, giant clams are the subject of conservation efforts in many parts of the world. They are threatened by overfishing, habitat loss, and pollution, and several species are listed as endangered or vulnerable by the International Union for Conservation of Nature (IUCN). Conservation efforts include the establishment of marine protected areas, captive breeding programs, and efforts to promote sustainable harvesting practices.
Abalones are scientifically named as
Haliotis
Trochus
Turbo
Chiton
 |
| source - wikipedia |
Abalones are scientifically named as Haliotis. They are a type of marine snail, belonging to the family Haliotidae, and are known for their large, ear-shaped shells with a pearly, iridescent interior. Abalones are found in coastal waters around the world and are an important food source in many cultures. They are also valued for their shells, which are used in jewelry and decorative arts.
Pinctada fucata comes under the family
Vasidae
Patellidae
Pteriidae
Mytilidae
_(Japan).jpg) |
| source - wikipedia |
Pinctada fucata is a species of pearl oyster that belongs to the family Pteriidae. It is commonly known as the Akoya pearl oyster and is native to the coastal waters of Japan, although it is also found in other parts of the world, including China, Korea, and Vietnam. The Akoya pearl oyster is known for its ability to produce high-quality pearls, which are widely used in jewelry.
The Akoya pearl oyster is a bivalve mollusk, meaning that it has a hinged shell that is divided into two halves. The shell of the Akoya pearl oyster is round or oval-shaped and is typically about 10-15 cm in diameter. The shell is usually grayish-white in color and has a smooth, shiny surface. The interior of the shell is lined with a layer of nacre, which is the same material that is used to make pearls.
The Akoya pearl oyster is widely cultured for its pearls, which are produced when a small piece of tissue from a donor oyster is implanted into the mantle of the Akoya pearl oyster. The oyster then secretes layers of nacre around the implanted tissue, forming a pearl. The resulting pearls are typically small, ranging in size from 2-10 mm in diameter, and are known for their luster, color, and roundness.
In addition to being used for pearl production, the Akoya pearl oyster is also harvested for its meat, which is considered a delicacy in some cultures. The meat is usually eaten raw or cooked and is often served with soy sauce and wasabi.
Like other members of the family Pteriidae, the Akoya pearl oyster is a filter feeder, meaning that it obtains its food by filtering small organisms, such as plankton, from the surrounding water. The oyster pumps water through its gills, trapping food particles on mucus-covered cilia, and then transfers the particles to its mouth.
The Akoya pearl oyster is an important species both ecologically and economically. However, it is also threatened by overfishing, habitat destruction, and pollution. Conservation efforts are underway to protect the oyster and its habitat, including the establishment of marine protected areas, the promotion of sustainable harvesting practices, and the development of pearl farming techniques that minimize environmental impacts.
‘Torsion’ occurs in
Bivalve
Cephalopod
Scaphopoda
Gastropoda
 |
| source - zoology notes |
"Torsion" occurs in Gastropods. Torsion is a unique characteristic of Gastropods, which is the twisting of the body during development so that the mantle cavity, anus, and gills are located above the head, and the head and mouth are located near the ground.
The torsion is thought to have evolved as a way to allow the snails to move more efficiently through their environment. It also allowed the development of a more complex digestive system, as the twisting brought the anus and mantle cavity closer to the mouth and allowed for better control of food and waste.
Torsion has important implications for the biology and ecology of Gastropods. For example, it affects the way snails breathe and excrete waste, and it can also influence their ability to feed and interact with their environment. Torsion can also have an impact on the evolution of Gastropod species, as it can influence their ability to adapt to different environments and ecological niches.
Example for parasitic copepod is
Squilla
Euphausia
Lernea
Calappa
 |
| source- wikipedia |
~
Lernea is a genus of parasitic copepods that are known for their ability to attach themselves to the skin or gills of fish and feed on their host's blood or tissues. There are several species of Lernea, each of which is specialized to infest a specific host species.
Lernea copepods have a distinctive shape, with a long, slender body that tapers towards the posterior end. They have two pairs of antennae, which are used for sensing the environment and locating potential hosts. The mouthparts of Lernea copepods are adapted for piercing the skin of the host and extracting blood or tissues.
Once a Lernea copepod has located a host, it attaches itself to the skin or gills using a pair of hooks or other specialized structures. The copepod then feeds on the host's blood or tissues, using its mouthparts to pierce the skin and suck out fluids. Infestations of Lernea copepods can cause significant damage to fish populations, as they can reduce growth rates, weaken immune systems, and even cause death.
Lernea copepods have complex life cycles, which involve several developmental stages and multiple hosts. The eggs of Lernea copepods are laid on vegetation or other objects in the aquatic environment, and hatch into free-swimming larvae. These larvae then seek out a suitable host, where they attach themselves and begin to feed. As they mature, Lernea copepods will detach from the host and release their offspring into the environment, where they will seek out new hosts and continue the cycle.
The infestation of Lernea copepods is a common problem in aquaculture, where it can cause significant economic losses. Infestations can be controlled using various methods, including chemical treatments, biological controls, and management practices that reduce the risk of infestation. However, prevention is the most effective approach to controlling Lernea copepod infestations, and fish farmers are advised to practice good hygiene and biosecurity measures to minimize the risk of infestation.
Spiny lobster comes under the family
Nephropidae
Palinuridae
Scyllarida
Penaeidae
 |
| source- wikipedia |
Spiny lobster comes under the family Palinuridae. Palinuridae is a family of marine crustaceans that includes the spiny lobsters, also known as rock lobsters or crayfish. The family includes around 60 species that are found in tropical and subtropical waters around the world.
Spiny lobsters are characterized by their long, spiny antennae and tough, spiny exoskeletons. They have five pairs of legs, with the first pair modified into large claws that are used for defense and capturing prey. Spiny lobsters are nocturnal, and they feed on a variety of invertebrates, fish, and even carrion.
Palinuridae is an important commercial fishery, and spiny lobsters are highly valued for their meat, which is considered a delicacy in many cultures. They are also popular in the aquarium trade, where they are prized for their ornamental value and unique behaviors.
Due to overfishing and habitat destruction, many species of spiny lobster are now threatened or endangered. Conservation efforts are underway to protect these valuable crustaceans and ensure their long-term survival in the wild.
Example for the order Cladocera is
Cypris
Calanus
Daphnia
Lepas
Daphnia is an example for the order Cladocera. Cladocera is a group of small, freshwater crustaceans that are characterized by a flattened body, a single compound eye, and a pair of large, branched antennae. They are found in a wide range of freshwater habitats, from ponds and lakes to rivers and streams.
Daphnia, also known as water fleas, are perhaps the most well-known members of the Cladocera. They are small, translucent crustaceans that are an important part of freshwater ecosystems, serving as a primary food source for many species of fish and other aquatic animals. Daphnia feed on algae and other small particles suspended in the water, and they play an important role in maintaining water quality by filtering and recycling nutrients.
Daphnia have a unique reproductive strategy, known as cyclical parthenogenesis. Under favorable conditions, they reproduce asexually, producing clones of themselves that are genetically identical. However, under unfavorable conditions, such as a lack of food or an increase in predators, they switch to sexual reproduction, producing offspring that are genetically diverse and better adapted to survive in changing conditions.
Daphnia are commonly used as model organisms in scientific research, due to their small size, transparency, and ease of culture in the laboratory. They have been used to study a wide range of topics, from genetics and developmental biology to ecology and evolution.
Umbonium are commonly called as
Whelks
Button shell
Sacred chank
Cowries
.jpg) |
| source - wikipedia |
Umbonium are commonly called as "Button shell". Umbonium is a genus of small, shallow-water sea snails that belong to the family Trochidae. These snails are commonly found in tropical and subtropical waters around the world, and are known for their small size and distinctive button-like shape.
The shells of Umbonium are typically less than an inch in size, and are flattened and disc-shaped, with a series of ridges or grooves radiating out from the center. The shells are usually brightly colored, with patterns of spots, stripes, or other markings.
Umbonium are often collected by beachcombers and shell collectors, who appreciate their attractive appearance and unique shape. However, they are not commonly used in jewelry or other decorative objects, as their small size makes them difficult to work with.
Umbonium are not considered a significant food source for humans, although they are sometimes consumed by other marine animals, such as fish and birds. They play a small role in the ecology of tropical and subtropical marine ecosystems, serving as a prey item for some species and competing with others for resources.
Of the following shells which one is protected under Wild Life Protection Act.
Lambis chiragra
Umbonium restiarium
Oliva gibbosa
Babylonia spirata
 |
| source - inaturalist |
Lambis chiragra is the shell that is protected under the Wild Life Protection Act. Lambis chiragra is a species of sea snail commonly known as the "Spider Conch". It is found in the Indo-Pacific region and is known for its large size and distinctive shape, which resembles a spider with its legs folded under its body.
Due to overharvesting for their shells, as well as habitat destruction and other threats, populations of Lambis chiragra have declined significantly in many areas. In response to this, many countries have implemented protective measures to conserve this species, including listing it under their respective wildlife protection acts.
In India, Lambis chiragra is protected under Schedule I of the Wild Life Protection Act, which provides the highest level of protection to endangered species. It is illegal to hunt, trade, or possess the shells of Lambis chiragra without a permit from the government. Violators can face fines and imprisonment under the law.
For more information kindly join us,
.png)
Comments
Post a Comment