Transcript DN 9-28 Lecture 7 - rodents day 1x

Welcome to Mammal Bio
Do Now 9/28:
Answer the questions below in your
notebook
1. How could living in a colony as a
behavioral adaptation be advantageous
and disadvantageous in relation to
natural selection?
LEARNING TARGETS: STUDENTS WILL BE ABLE TO:
-SUMMARIZE CHARACTERISTICS OF ORDER RODENTIA
-SUMMARIZE CONSERVATION ISSUES OF RODENTS
-COMPARE AND CONTRAST BEHAVIORAL ADAPTATIONS OF BEES AND MOLE RATS
-ANALYZE HOW RODENT ADAPTATIONS HAVE BEEN ADVANTAGEOUS OR
DISADVANTAGEOUS IN RELATION TO EVOLUTION
Exc A
Met B
App C
Beg D
- Analyze how rodent
adaptations have been
advantageous or
disadvantageous in
relation to evolution
-Can summarize all
the characteristics of
rodents
- Can summarize all
conservation issues
that endangered
rodents encounter
- Compare and
contrast the
behavioral
adaptations of
honey bees and
mole rats
-Can summarize some
of the characteristics
of rodents
-Can summarize some
conservation issues
that endangered
rodents encounter
-Can summarize
some of the
characteristics of
rodents
TPS- Share goal and how you are going to learn to reach it.
Invasive Species Rodents of the
Gallapagos Article
Pre-reading- Answer the following
question in your notebook
1. Create a mind web of words relating to
invasive species
During reading- Annotate your reading 
Post Reading- Answer the questions at the
end of the reading and add to your mind
map creating more connections to your
mind map of invasive species
Plicker Questions- invasive
species
Lesson Plan Project Overview
Order Rodentia
Meaning- Latin (rodere or to gnaw)
TPS-
What do you think are
characteristics that organisms in
the order rodentia have?
Characteristics of order Rodentia
•Specialized ever-growing, self-sharpening incisors (2
upper, 2 lower) no canines
•Cheek teeth may be ever-growing
•Mostly small, average range of body size is 20-100 g,
but some can get pretty large (capybara is largest species,
may reach 50 kg)
•Mostly herbivorous or omnivorous
•Females with duplex uterus, baculum present in males
•Worldwide distribution, wide range of habitats and ecologies
Females with duplex uterus
TPS- What is the evolutionary advantage to having a duplex
uterus?
Baculum present in males (a penis bone)
RODENT NICHES:
ROLES OF ORGANISM IN
THE ECOSYSTEM
 Generalists
 Herbivores
and omnivores (mostly insects)
R
Selected (reproduce in large numbers with
little parental care)
 Fill
a diverse range of niches some arboreal to
underground and diurnal to nocturnal
EVOLUTIONARY HISTORY
 Rodents
are one of the oldest groups of mammals dating
to the late Paleocene in North America and Asia
 Earliest
 TPS-
fossils age them to 57 million years old
Observe the fossil Masillamys below what
characteristics of this order does it appear to have?
COMMON ANCESTRY: GLIRES
SUB ORDERS
RODENTS ARE 43% OF ALL MAMMAL SPECIES
(2,277 SPECIES IN 33 FAMILIES)
Sciuromorpha: squirrels, dormice, mountain beaver,
and relatives
Castorimorpha: beavers, gophers, kangaroo rats, pocket
mice, and relatives
Myomorpha: mice, rats, gerbils, jerboas, and
relatives
Anomaluromorpha: scaly-tailed squirrels and
springhares
Hystricomorpha: hystricognath rodents...lots of South
American and African species, mostly
SCIUROMORPHA
 Organisms
included:
Squirrels and mountain
beavers
 Characteristics-
shape of
the infraorbital canal and
attachment of the lateral
masseter muscles along
side the rostrum
Family: Castorimorpha
 Semi
aquatic
 Large
size to volume ratio- helps them to
stay warm
 Webbed
 Eyes
hind feet
have nictitating membranes
 Specialization
in esophagus allowing
them to swim with mouth open
 Castor
glands
 Keystone
species that develop habitat
for other species
Family: Caviidae
Capiybara (largest rodent)
 Tibia
and fibia are partially fused
 Digits
are reduced to 3 manus and
2 ped
 Ever
Growing Cheek Teeth
Family: Anomaluridae
Lord Derby’s Scaly-Tailed Squirrel
Morphological
adaptationskin flaps for gliding (fold of
skin between wrist and hind
foot)and elbow cartilage strut

Arboreal
Family Bathyergidae
African Mole Rat
 Small
eyes poorly developed vision
 Powerful
 Feet
incisors used to dig
used to dig
 Behavioral
adaptation- Colony behavior with
specialized roles, cooperative care of young and
division of labor
 Niche-
underground herbivores eating roots of
plants aerating soil
PHYSIOLOGICAL ADAPTATIONHIBERNATION
TPS-
What is the evolutionary advantage
of hibernation?
Lowering
of metabolic processes
Slowing
of breathing and heart rate
Temperature
decline
ENDANGERED
BAHAMAS HUTIA
 Characteristics
of Hutia-
 Nocturnal
herbivore feeding mostly on leaves and
twigs of shrubs
 Size
of a rabbit
 Endangered
due to habitat loss, deforestation,
over hunting, predation due to cats and dogs
 Populations
are rebounding due to protection
and captive breeding program
EXIT SLIP- COMPLETE ON THE BACK OF
BEE MOLE RAT COMPARISON G.O.
1.
What are characteristics of rodents?
2.
What are 3 adaptations that rodents have?
3.
Have these been evolutionarily
advantageous or disadvantageous? Explain
your answer.
4.
What are some conservation issues that an
endangered rodent experiences? Be sure to
explain the causes.
REFLECTION ON LEARNING TARGETS: STUDENTS WILL BE ABLE TO:
-SUMMARIZE CHARACTERISTICS OF ORDER RODENTIA
-SUMMARIZE CONSERVATION ISSUES OF RODENTS
-COMPARE AND CONTRAST BEHAVIORAL ADAPTATIONS OF BEES AND MOLE RATS
-ANALYZE HOW RODENT ADAPTATIONS HAVE BEEN ADVANTAGEOUS OR DISADVANTAGEOUS IN
RELATION TO EVOLUTION
Exc A
Met B
App C
Beg D
- Analyze how rodent
adaptations have been
advantageous or
disadvantageous in
relation to evolution
-Can summarize all
the characteristics of
rodents
- Can summarize all
conservation issues
that endangered
rodents encounter
- Compare and
contrast the
behavioral
adaptations of
honey bees and
mole rats
-Can summarize some
of the characteristics
of rodents
-Can summarize some
conservation issues
that endangered
rodents encounter
-Can summarize
some of the
characteristics of
rodents
Reflect on your learning goals on the rubric:
1.How did you reach your goal? Be specific about what content you learned/ what you did.
2. What support would help you meet/exceed your goals?
STATION ROTATION COMPARE AND
CONTRAST LAGOMORPHA AND
RODENTIA SKULLS AND PELTSMUSKRAT ADAPTATIONS FROM
INFER FROM OBSERVATIONS ?
READING ON NICHES,
CONVERGENT EVOLUTION IN
RODENTS?