Agriculture
Seeds of the Future
Hungry bug seeks hot meal
Middle school science adventures
Amphibians
Poison Dart Frogs
Bullfrogs
Frogs and Toads
Animals
Roach Love Songs
Not Slippery When Wet
Copybees
Behavior
Making Sense of Scents
Honeybees do the wave
Swedish Rhapsody
Birds
Swifts
Turkeys
Doves
Chemistry and Materials
The metal detector in your mouth
Sugary Survival Skill
The memory of a material
Computers
The Earth-bound asteroid scientists saw coming
Getting in Touch with Touch
The Book of Life
Dinosaurs and Fossils
Dinosaur Eggs-citement
Three strikes wiped out woolly mammoths
An Ancient Spider's Web
E Learning Jamaica
2014 GSAT Results for Jamaican Kids
Results of GSAT are in schools this week
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Earth
Giving Sharks Safe Homes
Earth's Poles in Peril
Science loses out when ice caps melt
Environment
Alien Invasions
A 'Book' on Every Living Thing
Swimming with Sharks and Stingrays
Finding the Past
Sahara Cemetery
Salt and Early Civilization
Writing on eggshells
Fish
Eels
Seahorses
Saltwater Fish
Food and Nutrition
In Search of the Perfect French Fry
The Color of Health
Sponges' secret weapon
GSAT English Rules
Whoever vs. Whomever
Adjectives and Adverbs
Who vs. Whom
GSAT Exam Preparation Jamaica
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
The Annual GSAT Scholarships
Preparing for the GSAT Exam
GSAT Exams Jamaica Scholarships
42,000 students will sit for the GSAT Exam in two weeks
Access denied - Disabled boy aces GSAT
GSAT Scholarship
GSAT Mathematics
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
GSAT Mathematics Quiz, Teaching Math, teaching anxiety
Play for Science
Human Body
Speedy Gene Gives Runners a Boost
Gut Germs to the Rescue
A New Touch
Invertebrates
Mussels
Flatworms
Black Widow spiders
Mammals
Woolly Mammoths
African Elephants
Humans
Parents
Raise a Lifelong Reader by Reading Aloud
Expert report highlights the importance to parents of reading to children!
Choosing a Preschool: What to Consider
Physics
Gaining a Swift Lift
Project Music
Electric Backpack
Plants
Fungus Hunt
The algae invasion
Flower family knows its roots
Reptiles
Tortoises
Cobras
Copperhead Snakes
Space and Astronomy
A Galaxy Far, Far, Far Away
Return to Space
An Icy Blob of Fluff
Technology and Engineering
Shape Shifting
Reach for the Sky
A Clean Getaway
The Parts of Speech
Problems with Prepositions
Adjectives and Adverbs
What is a Preposition?
Transportation
Robots on a Rocky Road
Middle school science adventures
Morphing a Wing to Save Fuel
Weather
Catching Some Rays
A Dire Shortage of Water
In Antarctica watch the heat (and your step)
Add your Article

Mussels

The term mussel is used for several families of bivalve mollusks inhabiting lakes, rivers, and creeks, as well as intertidal areas along coastlines worldwide. The freshwater mussels (several allied families, the largest being the Unionidae) and saltwater mussels (family Mytilidae) are not closely related, and are grouped in different subclasses, despite some similarities in appearance. The freshwater Zebra mussels and their relatives (family Dreissenidae) live attached to rocks in a manner similar to marine mussels, but are classified with the Heterodonta, the taxonomic group including most bivalves referred to as "clams". External anatomy: The mussel's external shell is composed of two valves that protect it from predators and desiccation. Protruding from a valve is an enlarged structure called the umbo, which indicates the dorsal surface of the mussel. Foot: Like most bivalves, mussels have a large organ referred to as a foot, which is tongue-like in shape with a groove on the ventral surface, which is continuous with the byssus pit. In this pit a viscous secretion is poured out which enters the groove and hardens gradually when it comes into contact with sea water. This forms an extremely tough byssus thread that secures the mussel to its substrate. Feeding: Both marine and freshwater mussels are filter feeders that feed on plankton. They do so by drawing water in through their incurrent siphon. The water is then brought into the branchial chamber by the actions of the cilia located on the gills for cilliary-mucus feeding. The waste water exits out through the excurrent siphon. The labial palps finally funnel the food into the mouth where digestion can continue. Clumping: Marine mussels are usually found clumping together on the wave-washed rocks with one another, which anchors them against the force of the waves. Those mussels found in the middle of a clump will have less water loss due to water capture by the other mussels. Predators: Marine mussels in the wild are eaten by starfish, while living freshwater mussels are a favored source of food for muskrats, otters, raccoons and other mammals. Outside fertilization: Both marine and freshwater mussels are gonochoristic, with separate male and female individuals. In marine mussels, fertilization occurs outside the body, and there is a larval stage that drifts for a period of from three weeks to six months before settling down on a hard surface as a young mussel. There, it is capable of moving slowly by means of attaching and detaching byssal threads to attain a better life position. Flushing oxygen-rich water: Freshwater mussels also reproduce sexually. Sperm released by the male directly into the water enters the female via the incurrent siphon. After fertilization, the eggs develop into the larval stage called glochidia. The glochidia grow in the gills of the female where they are constantly flushed with oxygen-rich water. For a time, these glochidia are parasitic on fish, attaching themselves to the fish's fins or gills. They grow and then break free from the host and drop to the bottom of the water. If they land in a place that suits their needs, they will continue their development and begin their independent life. Freshwater mussel glochidia are generally species-specific and will only live if they find the correct fish host. Reproduction in the Dreissenidae (zebra mussels and their relatives) is similar to that of the marine mussels.

Mussels
Mussels








Designed and Powered by HBJamaica.com™