They discovered that fish larvae that survive a long, rough, offshore journey eventually arrive at a near
shore reef in good condition, and that they thrive afterwards. In contrast, locally produced young have a relatively
easy life and they arrive on the reef (near the area where they were spawned) in a variety of conditions –– from poor to
good. Only the young that are in good condition survive after a month on the reef. "This research delves into one of the
major questions of how populations are connected through dispersal," said Scott Hamilton, a postdoctoral fellow in the
Department of Ecology, Evolution, and Marine Biology (EEMB) at UC Santa Barbara. "We want to know where the young of
many marine organisms are coming from and going to, and what factors determine whether they survive." Click
Aggression, testosterone and nepotism don't necessarily help one climb the social ladder, but the support
of a good female can, according to new research on the social habits of an unusual African species of fish. "We found
that changes in social status were regulated by the most dominant female in a social group", says John Fitzpatrick,
shown just above, lead researcher and a graduate student in the department of Biology at McMaster University. "In fact,
dominant females seemed to act as gatekeepers, allowing only males larger than themselves to move up in status and
become dominant." Working underwater off the Zambian shores of Lake Tanganyika in Africa, the researchers examined how
males respond to changes in social position in the cichlid fish, Neolamprologus pulcher, which is sometimes called the
Daffodil. This species lives in permanent social groups made up of a dominant male and female breeding pair and
subordinate males and females that help this pair look after young and defend territory. By removing the male breeders,
researchers created vacancies and provided an opportunity for subordinate males to rise through the ranks. Click
It's one of the facts that everyone knows and accepts: fish have little or no memory. But one particular
fish is busy dispelling this myth after a scientist has managed to train him to eat on command. The giant humphead
wrasse called Bentley, shown just above, knows that when a "dinner gong" is sounded in his tank it's time to go for
food. Experts say Bentley, who is a tropical fish, has learned to associate the noise with feeding time in an experiment
that mirrors the famous test carried out on dogs by Russian scientist, Pavlov. Click
For those who feel a bit cut off from the sea here in Moscow, you may be pleased to hear that the Moscow
zoo at Krasnopresnenskaya will soon be introducing a huge aquarium with glass underwater passages. You can escape the
slush and pollution of the city streets and, for the duration of your visit, experience an almost underwater existence
as you make your way through the transparent corridors and marvel at the different species of fish. Click
Scientists have known for some time that most major groups of complex animals appeared in the fossils
record during the Cambrian Explosion, a seemingly rapid evolutionary event that occurred 542 million years ago. Now
Virginia Tech paleontologists, using rigorous analytical methods, have identified another explosive evolutionary event
that occurred about 33 million years earlier among macroscopic life forms unrelated to the Cambrian animals. They dubbed
this earlier event the "Avalon Explosion." Click
Normal coral, shown above on the left, exposed to ultraviolet filters found in sunscreen "bleaches"
white, shown above on the right, when the algae living inside it die. Up to 10-percent of coral reefs are threatened by
sunscreen-induced bleaching, a new study found. Click
here to see the original
article in National Geographic.
The Sahara, the Gobi, the Chihuahuan - all are great deserts. But what about the South Pacific's
subtropical gyre? This "biological desert" within a swirling expanse of nutrient-starved saltwater is the largest, and
least productive, ecosystem of the South Pacific. Together with the subtropical gyres in other oceans, biological
deserts cover 40% of Earth's surface. But their relative obscurity may be about to change. Researchers are reporting
that the ocean's biological deserts have been expanding, and they are growing much faster than global warming models
predict. Click here
Callers during this Show
George from Colorado calls and talks
about his 120-gallon aquarium, ultraviolet sterilization,
and his plans for his next big aquarium.
Jay from Indiana calls and talks about
what Tom wants to talk about, and we never actually find out
why Jay called !!
The Bailey Brothers
encourage YOU to call Pet Fish Talk
during the show and talk about your pet fish.
Download of this Entire Show
Here's how: Right-Click
here, then click on "Save Target (or Link) As ...".
Navigate to the folder you prefer, and click on the button labeled "Save".
Later you can copy the MP3-file to your iPod or other MP3-player.
You can also burn
files to CDs, then play them in a CD-player.
hereto buy an MP3-enabled CD-Player, or click
hereto buy an MP3-Player, or click
to buy an Apple iPod, which can all play Pet
Fish Talk Shows.
There are lots of Pet Fish Talk Shows.
now to go to the Archive, where you'll find links to more than
360 Pet Fish Talk
here to go to our Search Page, where you can search for any topic that we
have discussed in any show.
here for technical support, if Pet Fish Talk will not play on your computer.
If this web page looks too small or too narrow, hold down the
keyboard key marked "Ctrl" then press down on the key marked
+, and this web page should get bigger. If you overdue it
and this page gets too big, hold down the same "Ctrl" key
and press down on the key marked - to make this page
Repeat, until this
page looks just right to you. In this way you can customize
the appearance of our website in your computer. This tip
will work simultaneously on all the pages in this website,
and your computer should remember what you've done the next
time you come back to this site, unless you're using an
ancient version of a browser. ;^
advertisement, shown below, links to this advertiser's