The group of crabs known as fiddler crabs actually encompasses over 90 species and subspecies of the genus Uca that come from a variety of locations. Males and females are quite easily distinguished by their claws - the females have small claws, but the males have one very large claw (see photos of males and females). The largest fiddler crabs only reach a mature size of about 2 inches across their
You scratch Giant Crab 1 in the left first leg from behind, fracturing the chitin and bruising the fat!
The article that we read was called The Mystery of the Rare Male Sea Monkey by Nadia Drake. The rough idea of this article was how the female Sea Monkeys(brine shrimp) reproduced asexually and how the male Sea Monkeys couldn’t breed with their own kind. So, as a result, the male shrimp breed with different species resulting in hybrid offspring. It also compared shrimp that breed asexually and another that bred sexually. The vocabulary words found in the article were asexual, chromosome, and DNA. Asexual was used when explaining how the female sea monkeys reproduce. Chromosome was used when they explained that when an asexual lineage emerges, it gains an extra set of chromosomes. Finally, DNA was used when it said that for asexual
The horseshoe crab and the trilobite do share a common ancestor. There are many pieces of evidence in the anatomy of both species that support this claim. A first piece of evidence is that both species have an outer exoskeleton but no internal skeleton. This separates both of them from vertebrates, making both of them invertebrates. The second piece of evidence supporting walking legs of both species are also positioned on the underside of the animal, protected under the shell. Both the trilobite and the horseshoe crab have one horseshoe-shaped cephalothorax with a raised ridge in the middle of it and two eyes positioned on either side of the ridge. The mouth of both species is on the underside of the body as well, unlike crustaceans and insects
Zebra Mussels are small fingerlike size about two inches in length. They have a hard white shell with black strips. So that’s where they get their name. The Zebra Mussels originated from the Caspian Sea region of Asia. They are fresh-water mussel species capable to attaching to hard surfaces. The Zeba Mussels can tolerate a wide range of environment conditions. Adults can live out of the water for about seven days.
The Callinectes sapidus also known commonly as the Maryland Blue Crab, is a crustacean found in the Chesapeake Bay. The blue crab is found in aquatic environments, most often in estuaries. It characterized by it’s blue claws. The blue crabs undergo a life cycle of: zoeae, megalop, juvenile, and adulthood. The blue crab’s hard shells serve as a protective barrier for external dangers. The Callinectes sapidus comes from the order of Decapods, whereby it’s carapace has now evolved to be better suited for swimming. Of interest is the blue crab’s mating
This perspective often distorts the view of large crabbing businesses on their harvesting methods which, although are seemingly humane, are actually very detrimental to the crab population. For instance, when Hal Herzog, a Professor of Psychology at Western California University, ventured to Florida’s Gulf coast, the crabbers there explained to him the two varieties of crabs which they harvested; the “lucky” stone crabs and the “unlucky” blue crabs (Herzog). The blue crabs were considered unlucky because they were killed on the spot; however, the stone crabs were considered lucky because of their ability to regenerate their claws, and so crabbers would simply rip their claws off and then throw them back into the sea (Herzog). However,
It’s almost Mardi Gras time, and we can’t think of a way we like to celebrate better than a big old crawfish boil (or crayfish, or crawdads, or mudbugs, or whatever you call them). These tiny, freshwater crustaceans are basically tiny lobsters, but that doesn’t stop them from perplexing people from outside Fat Tuesday’s homeland year after year.
Jared Diamond is a world renowned scientist, author, Pulitzer Prize winner, and currently a geography professor at UCLA. Of his six books published, we will be looking at the last chapter of his fourth book, Collapse: How Societies Choose to Fail or Succeed. In this book Diamond utilizes the comparative method to find resemblance in past societal collapses with our current society. In the chapter entitled, "The World as Polder: What Does it Mean to Us Today," Diamond points out that there are indeed many parallels between past and present societies and that our modern day society is currently on a path of self destruction , through examples such as globalization and the interdependency of each country.
Each spring, the Delaware Bay becomes the site of one of the most spectacular and ancient phenomena in the natural world: the spawning of horseshoe crabs and the flocking of ravenous shorebirds that depend on them.
In the article entitled “SeaWorld tanks or sea pens? Dispute over which is best for orcas continues,” the Los Angeles Times is mainly focused on a dispute over releasing killer whales, SeaWorld thinks orcas would be safer in a large tank while animal activists and SeaWorld critics want orcas given a sense of freedom in a sea pen. First, the Los Angeles Times explores how marine biologists agree that these whales will most likely never be freed and if a compromise is made, the closest they would get to freedom would be a limited environment: “But marine biologists — including SeaWorld critics — agree that the orcas probably will never be released to the open seas. Even if the killer whales don’t spend the rest of their lives in the theme park, the closest they would get to freedom would be retirement in ocean coves.
I used to be able to wake up to the sound of my fiddler crabs scuttling. I would wake up, check on them, and go get ready for school. Unfortunately, they died when we left them with the neighbors. Now, my parents won't let me get any more replacements. Arguably, they should let me keep two female fiddler crabs. This has been concluded, because I take care of them myself, they are also cheap to purchase, and they are easy to keep while on vacation. I really love fiddler crabs.
BuccalWafers: A formulation consist of wafer with surface layers possessing adhesive properties, while the bulk layer consists of antimicrobial agents, biodegradable polymers and matrix polymers
This study is designed to assess the hypothesis that the exoskeletons from decapods, specifically of shrimps and crabs, are capable biosorbents for the removal of heavy metals in waste water.
In our effort at keeping algae away from our tanks, algae eaters can be great allies. Here is a short list of some saltwater algae eaters I know (more will be added later). If you know any other fish or invertebrates that should be added to this list or would like to add some information to this list, please use the comment box bellow. Thanks!
All are carniverous and have four pair of walking legs, one pair of pedipalps, and one pair of chelicerae. (Spiders, W.Shear) Each chelicerae consists of a base and a fang.