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Brazilian Wandering Spider

The biology of the Brazilian Wandering Spider

Madi Motley

on 18 October 2012

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Transcript of Brazilian Wandering Spider

Brazilian Wandering
Spider What does it look like? The Amazon region Geographical Range The Brazilian Wandering Spider lives in these parts of the Amazon region.
Brazil, Peru, Ecuador, Guyana, and Suriname. Their leg span ranges from13-15 cm! What does it look like? Their body length ranges from 17-48 mm It is a large hairy spindly looking spider.

It has 8 eyes, 2 of which are large.

They are fast moving and have distinctive red jaws which they display when angered. Taxonomic
Classification Animalia (Living animal)
Arthrophoda (Segmented body, external skeleton)
Arachnida (Spiders, Ticks, Scorpians, etc.)
Araneae (Spiders)
Ctenidae (Wandering Spiders)
Phoneutria (Brazilian Wandering Spiders)
Phoneutria Fera (Brazilian Wandering Spider from
the Amazon Region) Kingdom:
Type: 7 other species in the same genus:
P. bahiensis
P. keyserling
P. pertyi
P. boliviensis
P. eickstedtae
P. reidyi
P. nigriventer Close Relatives Atlantic Rainforest of Brazil Central South America Throughout Brazil Venezuela, Peru, Brazil Brazil, Argentina, Uruguay Old world spider fangs Specialized Adaptations Most venomous spider
on Earth Venomous neurotoxin Causes loss of muscle control Colored to match
environment 8 eyes Population Status Unknown!

Prediction: The spiders population
may go up or stay relatively the same. It is called the Brazilian "Wandering" Spider because it wanders the forest floor at night.

In densely populated areas, it hides in dark places during the day.

Often called the banana spider because it hides in shipments of bananas. Habitat Food they eat Niche Crickets
Mice They hide in dark places
during the day (houses, clothes,
log piles) and wander the jungle
floor by night, looking for prey. Mating Reproduces by creating
egg sacs, then the
male quickly leaves
after mating. In this niche, no animal
competes with this spider
that we know of. Intraspecific Competition

It would be fighting against other male
and females for territory, food, or mates.
Other competition could be against other
Phoneutria spiders in its genus. Competition Interspecific Competition

It would be fighting against the other
living organisms in the Amazon
such as birds, rodents, snakes, and
wasps for territory and food. Spider vs. Mouse Symbiotic Relationships Predator vs Prey
more severe type of parasitism,
kills and eats where as parasites do
not want to kill the organism. Two factors that determine the environmental
resistance on an animal are: Environmental Resistance
and Factors Abiotic

Since the Phoneutria Fera
lives in the rainforest,
temperature and weather
would be a large abiotic
factor in its life. Biotic

The pompillid wasp is
one of this spiders
biggest and very
few predators. * There are no biogeochemical cycles The phoneutria fera is a climax species. These spiders have
been there for a long time and are the oldest of the species.
Although deforestation has occured within the Amazon
rainforest, the P. fera can relocate and adapt easily to the

They are not a species that has been introduced to a new
area because of destruction or in the middle stages of adapting
to its environment. Pioneer/Seral/Climax Species The P. fera lays an eggsack that takes about a month to hatch.
500+ spiderlings a few millimeters in size are laid about every
2-3 months.

This means the biotic potential for this spider is high. Biotic Potential Factors

Biotic: Prey
Abiotic: Weather, natural disasters The P. fera is an r-selected organism because they produce
offspring in large amounts everytime they lay an egg.

Also, there is not much parental care or learning that
takes places.

They have high fertility/fecundity/ and biotic potential. K or r Selected By Madi, Maddy, and Rodney!
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