Cartilaginous and bony fish regulate the salt found in water by:
Fish- drink a lot of seawater for hydration and excrete the concentrated salt through their gills and gut
Sharks- Reabsorb the area by the breakdown of protien back into their tissue
Sharks have developed a life strategy that requires slow growth to a relatively large size, while fish demonstrate rapid growth and reach maturity faster
Shark reproduction is internal. They have pelvic claspers that serve as the sperm conducting structure for internal fertilization.
Mary Cruz
Thursday, May 23, 2013
Tuesday, May 21, 2013
What are cartilaginous fish
Cartilaginous fish differ from other fish because they have skeletons made of cartilage
Examples of cartilaginous fish include sharks, rays, and chimeras
A sharks eye is special because some can protect their eye with a tough 3rd eyelid, and some even have a muscle that can roll their eye backward for protection.
Differences between bony and cartilaginous fish:
Sharks have fewer and larger blood cells
Shark skin is covered by dermal denticles and bony fish are covered in flat scales
Shark kidneys and genitals empty in only one opening while bony fish have two separate openings, the rectum and the anus.
Examples of cartilaginous fish include sharks, rays, and chimeras
A sharks eye is special because some can protect their eye with a tough 3rd eyelid, and some even have a muscle that can roll their eye backward for protection.
Differences between bony and cartilaginous fish:
Friday, May 10, 2013
Marine Science Words of Wisdom
"Dont wander away unseen for ten years...come back and visit often"
Sea turtle hatchlings have to make their way from their nest on shore to the open ocean, alone. From the
time they take their first swim until they return to the coastal ocean to forage as juveniles can take up to a decade and is called “the lost years” because they are so hard to track.
Wednesday, May 8, 2013
Nine Major Animal Phyla
The nine major phyla are:
1. Phylum Porifera - The Sponges
2. Phylum Coelenterata – The Coelenterates: jellyfish, hydras, corals
3. Phylum Platyhelminthes – The Flatworms: planaria, tapeworms
1. Phylum Porifera - The Sponges
2. Phylum Coelenterata – The Coelenterates: jellyfish, hydras, corals
3. Phylum Platyhelminthes – The Flatworms: planaria, tapeworms
4. Phylum Nematoda – The Roundworms
5. Phylum Annelida – The Segmented Worms: earthworm, leech, sandworm
6. Phylum Arthropoda – The Arthropods: insects, spiders, crustaceans
7. Phylum Mollusca – The Mollusks: clams, snails, oysters, octopus
8. Phylum Echinodermata – The Echinoderms: sea stars, sea urchins
9. Phylum Chordata – The Chordates: fish, reptiles, amphibians, birds, mammals
- The types of habitats they can be found in are salt water, fresh water, and terrestrial.
- Some species dont have digestive systems, but those who do either have a complete or incomplete one.
- I have seen birds in the shy flying by as an example of a species in a phyla
Friday, April 19, 2013
Animal Habitat April 11th
San Diego Bay is home to a list of Natural resources like salt marsh and tidal flats, birds nesting, and foraging sites
An invasive species is those who evolved elsewhere and whose introduction has or is likely to cause harm to the environment or human health.
An endangered species is a species who is at the risk of extinction. An endangered species in the SD Bay is the Pacific Green Sea Turtles. The San Diego bay offers a protected foraging habitat for the sea turtles and offers a prime study area for researchers
An invasive species is those who evolved elsewhere and whose introduction has or is likely to cause harm to the environment or human health.
An endangered species is a species who is at the risk of extinction. An endangered species in the SD Bay is the Pacific Green Sea Turtles. The San Diego bay offers a protected foraging habitat for the sea turtles and offers a prime study area for researchers
http://www.portofsandiego.org/environment/natural-resources.html
intro to SD bay
The San Diego bay is located in San Diego county. It is 19km long and 1.6 to 4.8 km wide. It is the 3rd largest of 3 natural bays
Activities on the bay are military activities and training
The shallow end of the bay is used for evaporation to extract salt from sea water.
The San diego National Wildlife refuge complex is located in Chula Vista
The purpose of the SD National Wildlife is to preserve and protect the rare birds of southern california coastal marshes.
Activities on the bay are military activities and training
The shallow end of the bay is used for evaporation to extract salt from sea water.
The San diego National Wildlife refuge complex is located in Chula Vista
The purpose of the SD National Wildlife is to preserve and protect the rare birds of southern california coastal marshes.
http://en.wikipedia.org/wiki/San_Diego_Bay
http://www.fws.gov/sandiegorefuges/
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