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Open the "Lab Worksheet" link, input your
password, and click "View Page."
Option A: Print the Lab Worksheet and record
your answers for each question, then turn your completed worksheet
into your instructor.
Option B: Copy the Lab Worksheet and paste
either into a blank word document, or into the body of an e-mail,
type your answers in the appropriate places, and e-mail your completed
Lab Worksheet to Brian (brian@ravenscience.org).
Specific Instructions for each section of the Lab
Worksheet.
Section 1: Marine Mammal Common Names
Click the "Marine Mammals Document" link on the opening
page of the Marine Mammals Lab.
Maximize the page.
Hover your cursor over the photographs on the lower bar to find
each photo's number that corresponds to the Lab Worksheet, Section
1.
Click on each photo to open it in another window for a larger view.
Scroll through "Section 1: Marine Mammal Common Names"
in the document to determine the organism's name. The vernacular
(or common) name is typed as bold, the scientific name is italicized
and in parentheses. Record your answer on the Lab Worksheet. If
you are stumped, go back to the Marine Mammals Lab opening page,
and click on "Hints."
Section 2: Orcas Identified by Individual Name
After you have completed the Marine Mammal Common Names section
of your Lab Worksheet, Scroll back up to the top of the page.
Click the link that says "J Pod." This will bring-up
the photo bar of some of the individual orcas in J Pod.
Scroll down to "Section 2: Individual Orca Identification,
J Pod Individuals."
Each orca has it's own unique light gray saddle patch behind it's
dorsal fin. The size and shape of this saddle patch is the key to
individually identifying the members of J, K, and L Pods. You will
need to look carefully at the sketches of each orca, and compare
these to the photos to be identified. Notice that some of the orcas
have scratches on their saddles. These are also an aid in identification.
When the individual is in it's first few years of it's life, it's
saddle is very dark. I have indicated this in the sketches by "dotting"
the saddle patch area.
All of the orcas have a shorter dorsal fin that is falcate, or curved
markedly on the trailing edge, when they are young. But as the males
mature (beginning at about 15 years of age) their dorsal fin begins
to grow very tall and very straight on the trailing edge. This process,
called "sprouting", takes about 5 years. After a male
reaches the age of 20, he is called a bull, or an adult male. A
bull's dorsal fin can attain a height of 2 meters.
Some of the orcas also have a unique marking on their dorsal fin.
These are called notches, and are though to result from mating behaviors.
I have marked the notches on the sketches with a short line adjacent
to them. Some of the notches are small and difficult to see in a
photo. This is where the "Hints" section can be of value
to you.
After you have identified the individuals in J Pod, scroll back
to the top of the document and link to "K Pod", then scroll
back down to the "K Pod Individuals" sketches and identify
these orcas.
Then scroll back up and link to "L Pod", and scroll back
down to "L Pod Individuals", and complete that section
of your worksheet.
Section 3: Behaviors of Marine Mammals
Scroll back up to the top of the page, and click the "Behavior"
link, then scroll down to the bottom of the page for the descriptions
of some common marine mammal behaviors.
Record the behavior that the marine mammal in each photo is exhibiting
on your Lab Worksheet.
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