Sunday, October 31, 2010
Fish reproduce in a variety of ways. Most are broadcast spawners, meaning that when the time is right, the females release their eggs, the males release their sperm and they both meet and mix producing fertilized eggs that develop into fish fry and eventually into adult fish. These snapper are spawning and you can tell by the large cloud of gametes in the water.
By producing a lot of eggs, the snapper hope to overwhelm any predators trying to make a meal so that there is no way all the fry are eaten and some will have a chance of surviving.
Wednesday, October 27, 2010
Pictured to the right, you can see five lamprey mouths and one lamprey head with blue eyes and seven gill holes.
Jawless fish include lampreys which are parasites and hagfish which are detritavores. Neither one will ever win a beauty contest.
Thursday, October 21, 2010
|Elijah is helping Moe with her Mantis Shrimp gloves|
|Tommy is helping Lindsey with her antennaes (and looking evil)|
|making feathery legs for the gooseneck barnacle|
|Lindsey's spiny lobster antennae is getting lots of help|
|Amanda is a decorator crab|
|Corrinn is a male fiddler crab|
|Courtney is a barnacle with feathery legs|
|Morgan is a sea cucumber complete with yellow tentacles|
Friday, October 15, 2010
It does smell a little bad.... but it is pretty fun, and the students do learn a lot. Here are some of the photos from today.
|Corrin and Rachel with Echinoderms (check out Corrin's cool new do)|
|ready to learn|
|shrimp with heads and super long antennae|
|ouch it's got me!|
|Kaitlin and the horseshoe crab|
|Jeremiah and the octopus|
|Kaitlin, Michelle, Bruce, and Jess at the Crab station|
|Alex, Tommy, and Lindsey at the lobster/crawdad station measuring claws|
|Bruce held the octopus (I think because of peer pressure)|
|More peer pressure for Amanda and Delafayetter|
|Cruella has nothing on Carlton and the shrimp heads :)|
|Harley and the crab get to know each other|
|Nate and the octopus, demonstrating something|
|This photo makes me laugh.|
|Brittney and the blue crab (it's a male)|
|Meet the shrimp (via Carlton) - BEST PHOTO of the DAY|
Saturday, October 9, 2010
There are two basic lobsters to be familiar with - the clawed lobster and the spiny lobster. Both are primarily scavengers. The clawed lobster has two different claws - a lighter faster shredder and a heavier more powerful crusher. The clawed lobster is more solitary because it is more aggressive. The spiny lobster does not have big claws, but can defend itself with its long whip like antennae. This lobster likes to congregate in groups and is not as aggressive. Both lobsters carry their eggs on the swimmerettes protecting them from potential predators.
|Left: male ; Right: Female|
- Blue Crabs are found in the Chesapeake Bay. They are very agressive, like to pinch, but are good to eat. They have a pointy-ended shell and swim fins. (you can kind of see the swim fins on the last leg of the crabs on the right)
- Spider Crabs have a rounder body shape, often a bumpy shell that will grow algae for camouflage, and longer more spindly legs. Spider Crabs include snow crabs and king crabs like the ones seen on Deadliest Catch.
- Fiddler Crab males have one claw that is a lot bigger than the other. This is for impressing the ladies, and used to show dominance over other males.
- Hermit Crabs have a weak exoskeleton and thus protect it with a stolen mollusc shell. They have adapted to this lifestyle and have modified back legs that hook on the inside to hold the shell on and one claw that is slightly larger to use as an operculum.
- Gulf shrimp are the ones people most people are familiar with because these are the ones we eat!
- Shore shrimp live in sea grasses, are fairly small and clear, and are not commercially harvested because no one would make any money.
- Snapping shrimp have slightly larger claws and can use them to make sonic waves to stun their prey with sound.
- Mantis shrimp whack their prey with arms that can unfold and strike lightning quick.
- Cleaner shrimp make their living eating parasites off of fish and other sea creatures.
If you look at a diagram, barnacles are like little shrimp glued on their backs with a white fence around them. They stick their feathery legs out to filter feed plankton. They are plankton for a while and once settled and glues onto a hard substrate never move again. This makes mating difficult, but the hermaphroditic barnacles have special talents. Gooseneck barnacles have a stalk that they attach to substrates with.
Thursday, October 7, 2010
Monday, October 4, 2010
Students took the Unit 4 Mollusc Test on Friday and did very well on it. These are the last assignments that will be included on the nine weeks grade.
Computer Lab Etiquette
You are in the computer lab to do work for this class. If you are not doing work, then we will have problems.
Do not pack up early. Work until the bell or until MsJ says.
SAVE OFTEN. And if you save to a key, also save it to your number. If you lose it, you will have to do it again.
If MsJ asks for your attention, stop what you are doing and listen to what she has to say.
You may watch videos about your organism through reliable websites.
You may listen to music through the computer if you have your own headphones. Rule1 MsJ cannot hear it. You get one warning. Rule2 Turn it on and listen – no million clicks and constant changing. Take both ear phones out when MsJ is talking.