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Animal Behavior Test IV Review
PSYC368 Test IV Review
Terms in this set (49)
ability to displace
when are you likely to see territoriality?
when resources are unevenly distributed
are grazers or browsers more likely to be territorial?
Browsers - you can't defend grass
single most important determiner of dominance
are dominance hierarchies usually linear?
no, trinagular. there is usually a smaller male who can displace a larger one randomly
traditional sociobiology says sperm is cheap, but some dude thinks it can be depleted -> this would mean there is a cost to the male
used in species where smaller males cannot hold a territory
limits on a male's reproductive success?
# of females they can sleep with
limits on a female's reproductive success?
Banderianski male choice of female in insects?
larger females, because larger females hold more eggs
What's a Lek?
Very rare. Males hold no territory, they just hang out communally and females choose from among them
Orange distribution of trinidad guppies?
normal distribution (bell curve)
how does the distrbution of orange in guppies relate to what females look at?
females preference is an upside down bell, so they like the most common stuff most.
Pitcher -> what correlates with the orange color of guppies?
more orange = more sperm
nematode parasite load
don't mate with them
Swaddle with Zebra Finches
made coloration assymetrical, and they had greater reproductive success.
Petri looks at the area of peacock's eyespots. What does this correlate with?
higher chick survival for bigger eyespots
Zehavi's handicap principle
I have a costly display. my ability to maintain them increases.
Eberhardt -> reproductive strategy controlled by females.
because complicated female anatomy interacts with sperm
female interacts with sperm to make them able to fetilize
advantage for a female prairie dog to mate with more males?
birds - any relation between age of sperm and embryo success?
older sperm are less viable
relationship between whether female ejects sperm and egg laying?
more likely to eject it further from egg laying
Scorpion flies - relationship between duration of copulation and size of food item?
larger food = longer copulation to a point
demonstrate that femles choose one males sperm over another in cuttlefish
two areas where sperm can be found -> one storage
ways a male can minimize competition between its sperm and others?
Guard female, plugs, duration of copulation, sperm loading, chemically increase female receptivity, remove other males sperm
percent of offspring the 2nd male fathers
bases of priority pattern (whether 1st or 2nd male advantage)
intervals between mating, anatomical differences (culdesac 2nd, conduit 1st), for animals that plug 1st, age (older male, less viable sperm)
Is the male organ different between poly and mono species?
yes - in polyamorous species, males have protrusions designed to make female take in sperm better
lives most of its life at sea -> elephant seals
describe elephant seal males.
on cove beach, very territorial, in a large area not so much. high ranking males copulate more, but in large pops, lower ranking males will copulate more.
elephant seal weight
males - 5000 lbs, females - 1800 lbs.
who shows up first during mating season?
males, to establish dominance
return to natal beach, so the males all know each other
difference between beach types and female behavior?
more aggressive on a little beach (cove)
differenc ein age when m/f reproduce?
females are sexually mature much younger
elephant seal milk?
high in lipids, lipid content increases after a few days, protein stays constant.
elephant seal foster mothers
take in extra pups to get rid of milk
why might females squabble with each other?
keep other females from getting too curious
elephant seal female incitation
female won't copulate with smaller male and throws a fit, then larger male hears and comes over and she copulates with him
does intrasexual behavior occur in elephant seals?
among males. practice probably.
why do more male weaners die?
they are more likely to try to keep suckling after weaning
sperm induction in spiders
male puts sperm on web then takes them up into the palps
several males on web, most powerful is hub male. nephila female is polyandrous. she copulates right after shedding, and while eating
weird thing about nephila male reproduction?
he invests all of his sperm in one newly molted female. sperm are released early on, but there are a ton of insertions after. this is a guarding function.
male rips of palp, dies of low blood pressure whie having sex
what is weird about reproduction in microthena?
second copulation is longer than first, and helps the sperm uptake on the first side anyway
female can eject sperm
Chris's work indicates:
second male releases fewer sperm in nephila
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