A short summary that summarizes all the important concepts regarding to reproductive strategies.
These notes will help you prepare for any test.
Everything is in a listed format to make it easy to learn.
Reproduction
A where
biological process a
living organism produces offspring
'
.
Genes transferred essential for survival i. evolution
-
are =
.
*
Reproductive success =
number of viable offspring an individual produces .
*
Reproductive strategy depends on how well an organism utilises energy to produce i. care for
offspring .
i. r -
strategy
More energy to produce MANY offspring
9
Little energy / time in
parental care
•
.
'
Many offspring die before adulthood but sufficient numbers survive to reproduce .
K
2
strategy
-
.
Fewer offspring produced
•
•
More in parental care
energy
Offspring better chance of survival
•
=
survivorship curve
concave curve
R strategy
-
-
is
1000 -
•
§
5
-
s Convex curve
n 100 -
* K strategy
-
-
§
E 10 -
-
z
Straight line
Steady survivorship
'
150
0
100
Eg small birds or squirrels .
% of maximum lifespan
, Courtship behavioural patterns that lead to mating and then offspring .
Purposes : I . Ensures both sexes are ready for mating
2. Saves
energy
=
help identify mates from same species (avoids unsuccessful mating )
Choose suitable mate [ males T chance of survival)
3. that are larger & stronger =
offspring
* Visual stimuli
E.g. Peacocks tail feathers
'
Fireflies flash specific light pattern .
* sound stimuli
E.
g Frogs and birds
* chemical stimuli
Females secrete pheromones :
signals they are sexually mature
E.g. Moths, dogs, female lions
*
Physical movement
Scorpions dance
•
Male tortoises t head
message
'
Male does aerobatics
eagle
'
Male weaver birds nests
•
make
⑨
• Environmental changes can affect mating .
'
Mammals = short mating season : births occur at most favourable times .
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through EFT, credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying this summary from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller KirstenRodrigues30. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy this summary for R50,00. You're not tied to anything after your purchase.
