Spider
Mimics
Moth
According to
a report by the University of Kentucky, the bolas spider (adult female)
emits chemical attractants that mimic the sex pheromones of its moth prey, a
form of aggressive chemical mimicry. Specific questions to be addressed include
the following: (1) Does the spider's emitted signal change over the course of a
night to correspond with the predictably different diel patterns of sexual
activity of its principal prey species? (2) Does the emitted signal vary
seasonally to correspond with predictable changes in abundance of its prey
species? (3) Do hunting tactics and the emitted signal vary plastically with
unpredictable prey availability?.
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‘High’ on Bugs?
• Drug addicts in the Philippines are going “buggy.” They are chewing live bugs
to get high. Due to strict antinarcotic laws and stiff prices, addicts are
turning to this cheaper euphoriant. “Called the Korean bug, it produces, when
eaten alive, a ‘high’ rivalling the effects of marijuana” and other drugs, says
Time Journal of Manila. The bugs are a little bigger than a grain of rice,
making it all the easier to smuggle them into the country from South Korea.
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WE
SMELL A RAT Scientists at Emory University say
they have genetically engineered "socially inept" rodents, also known as
rodents who sniff each other too much.
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Death By
Ant Bites SARASOTA, FLA.—The
Associated Press reports that Mary Morales Gay, an 87-year-old nursing home
patient suffering from Alzheimer's disease, died recently after she was
bitten 1,625 times by ants as she lay in her bed. State officials identified
the home as the Quality Health Care Center in North Port, in extreme southern
Sarasota County. State officials report that the center has had a clean record.
The official cause of death is
pending toxicology tests, the article reports, but the woman was severely bitten
by either fire ants or red ants. Gay did not have an allergic reaction to the
bites and likely lived for hours after being bitten, officials said. The ant
bites were on the right side of her chest, upper arm and part of her abdomen and
back, and appeared to have come over a period of time. The family, who declined
immediate comment, is talking to an attorney.
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Claim
of animal Cruelty with roaches? "performing
animals cannot ever be ``killed, injured, overworked or caused discomfort.''
LOS ANGELES, CALIF.--According to a Reuters News Service article, Lara
Deakin has had some strange assignments in her career, but few could compare to
the time she was called upon to protect a cockroach.
The roach was featured in a scene in
the Susan Sarandon movie ``Anywhere But Here.'' As a field officer for the Film
and TV Unit of the American Humane Association, Deakin was on hand to enforce
the AHA's strict code of conduct,
which mandates that performing animals cannot ever be ``killed, injured,
overworked or caused discomfort.''
In the case of the cockroach, the
article reports, Deakin came up with a simple safeguard to protect the pest
during an on-camera encounter with a can of Raid. She refilled the can with
Evian.
``We don't expect animal actors to be
kept on silk pillows eating bonbons all day,'' Gini Barrett, director of the AHA
western regional office, said. ``We just don't believe any animal should be
harmed for the sake of a film production.''
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Using
Its
Head Queen ants of the
Blepharidatta conops
species, a native of Brazil’s savanna, have a large flat, round head. According
to the Brazilian edition of National Geographic, the ants use this
unusual appendage to block the entrance to a chamber where eggs, larvae, and
pupae are stored, protecting these from potential predators. The walls of the
queen’s chamber are made up of parts of insect bodies collected by worker ants.
After extracting the body fluids from these bodies and carefully eliminating
their muscles, worker ants build an enclosure around the queen ant, leaving an
opening exactly the size of her head. Worker ants gain access to this special
chamber by tapping out a kind of password on the royal head.
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Fast
Roaches Anyone who has tried to catch cockroaches
knows that this is no easy task. What is their secret? For one thing, tiny hairs
on each side of their abdomen register the slightest air movement caused by
enemies and reveal the direction from which it comes. Also, their nervous system
appears to be extremely efficient, as the roaches need only one hundredth of a
second to react and run away. Now, by means of a high-speed camera, Jeffrey
Camhi and his colleagues at the Hebrew University of Jerusalem have learned
more, reports the newspaper Berliner Morgenpost. They found that
roaches can run at a speed of three feet [1 m] a second and at
this speed can even change direction up to 25 times a second. "We know of no
other orientation behavior in any animal capable of such a high frequency of
body turning," said Camhi, quoted in New Scientist. "If the
cockroach were not such a bad house guest, it would no doubt receive the
admiration it richly deserves."
How toxic is salt (sodium chloride)?
- Oral toxicity
Human; TDLo: 12,357 mg/kg/23 D-C
Mouse; LD50: 4,000 mg/kg
Rat; LD50: 3,000 mg/kg
Rabbit; LDLo: 8,000 mg/kg