As you listen to Pet Fish Talk, you can also follow
other underlined links to related web pages with pictures, videos, and more
information about the topics being discuss during the show.
After sundown, tourists would travel by boat to Jandayan Island off Bohol and go diving to look at the
luminous seahorses swimming among corals in the dark waters. For over 10 years, seahorses, like the one shown above,
have thrived in the waters off Getafe town in Jandayan, along with fish, corals and other marine life. The fisherfolk
and officials of Barangay Handumon helped make this possible. They banded together to put up, manage and protect a
marine sanctuary out in the sea since 1995 despite meager resources and little support from the national government. The
sanctuary has been adjudged the most outstanding marine protected area (MPA) in the country by the MPA Support Network
(MSN), a multisectoral alliance of organizations seeking to protect the marine environment. "To a large extent, they
have shown that they were consistently managing their areas," University of the Philippines' Marine Science Institute
Prof. Porfirio Aliño, MSN coordinator, said after the awards held at the Celebrity Sports Plaza in Quezon City recently.
He added: "You need to show that it has been sustained for a long time. It's quite a challenge if you think that it has
been sustained for 20 years." Click
In mid-February, at the height of Austral summer, the sun in the Antarctic never sets. Nor did the work
ever stop for University of Hawaii oceanography professor Chris Measures and his team of trace-metals oceanographers,
shown in the picture above, who worked around the clock measuring dust from the decks of the Scripps Institution of
Oceanography research vessel Roger Revelle. The researchers affixed bouquets of trumpet-shaped filters to the ship’s
mast to trap dust from the air, and for every degree of longitude, they sampled the sea, plunging a contraption of
cylindrical bottles to the depths of the upper ocean, screening water for remnants of dissolved dust and the trace
amounts of iron and aluminum they contain. Chemical oceanographers are interested in how chemicals enter and cycle
through the oceans. They are particularly interested in iron, a micronutrient necessary for plant growth. Just as pill
supplements are a way to get vitamins into human bodies, dust from continental deserts is one way to get iron into the
oceans, where phytoplankton use the dissolved form of iron, along with inputs like carbon dioxide, to process sunlight
and make food for themselves. In quantifying dust deposition, the researchers hunt for trace amounts of iron and
aluminum in the water column. Aluminum is not directly used by plants, but it exists in proportion to iron in desert
dust, and its presence in the oceans shows the origins and the paths of iron, long after the iron has been absorbed by
plants. Click here
DNA analysis shows that the piranha populations present in the Amazon flood plain but situated 100 metres
above sea-level have been in existence for no more than 3 million years. According to a new hypothesis, during the
marine incursion phase some piranha populations would have survived in the upstream parts of the network. Such
populations would have differentiated into species following the fragmentation of their zone of distribution, but
probably also in response to ecological constraints specific to the basin where they were kept in isolation from each
other. Once the ocean had regressed again, 3 million years ago, these piranhas could finally have dispersed downstream,
finding their way back to the Amazon's lowland plain which would have served as a gathering ground for biodiversity.
What now remains to be found are the ecological parameters that could have favoured the diversification of piranha
populations so confined to the upper reaches of the river network. One of the hypotheses advanced highlights water
quality as a factor in stimulating ecological and morphological differentiation of species. The field survey
observations indicated that some of the species were highly localized, in both geographical and ecological terms. For
example, Serrasalmus hollandi is mostly found in turbid, sediment-laden waters flowing down from Andean mountain
streams. In contrast, a new species the biologists discovered, lives in the same hydrographic basin but only in rivers
with crystal-clear waters bearing very little sediment content. However, water quality cannot be considered as the sole
factor behind speciation, seeing that a third piranha species was found living in either of these two categories of
river. The research results as a whole suggest that the superimposition of factors linked to geographical history and
ecological conditions, intervening at different spatial and temporal scales, is responsible for the diversification of
the piranhas. This is an evolutionary progression which should be transposable to other fish communities inhabiting
South American waters. Click here
When a female Swordtail, like the one shown above, is attracted to a male, entire suites of genes in her
brain turn on and off, show biologists from The University of Texas at Austin studying swordtail fish. Molly Cummings
and Hans Hofmann found that some genes were turned on when females found a male attractive, but a larger number of genes
were turned off. “When females were most excited—when attractive males were around—we observed the greatest down
regulation [turning off] of genes,” said Cummings, assistant professor of integrative biology. “It’s possible that this
could lead to a release of inhibition, a transition to being receptive to mating.” The same genes that turned on when
the females were with attractive males turned off when they were with other females and vice versa. This is one of few
studies to link changes in the expression of genes with changes in an individual’s behavior in different social
situations. Click here
An international team of researchers, led by the University of Sheffield, has demonstrated how Atlantic
cod fish, shown above, responded to past natural climate extremes. The new research could help in determining cods
vulnerability to future global warming. With fishing pressures high and stock size low, there is already major concern
over the current sustainability of cod and other fisheries. The new findings show that natural climate change has
previously reduced the range of cod to around a fifth of what it is today, but despite this, cod continued to populate
both sides of the North Atlantic. The researchers used a computer model and DNA techniques to estimate where cod could
be found in the ice age, when colder temperatures and lower sea-levels caused the extinction of some populations and the
isolation of others. Click here
State and federal wildlife officials will unveil an ambitious wetlands restoration plan Wednesday that
promises strong levees around South Bay, shown above, homes and businesses, new bayside trails for hikers and more
places for bird watchers to spot shorebirds and ducks. The plan is the first phase of a $1 billion, 50-year effort to
restore thousands of acres of former Cargill Inc. salt ponds purchased by the government four years ago. Various
wildlife agencies will work together to expand the bay's wildlife habitat and build trails and nature centers as part of
the long-term restoration. They also will construct solid levees to prevent flooding from periodic storms and rising
seas associated with global warming. Click
Callers during this Show.
Jourdan from Connecticut
calls and talks about his homemade aquarium filter in a
drinking water bottle and about his trip to Zambia in
Scott from New Hampshire
calls and asks about breeding Mbuna Cichlids in his
Dennis from Spokane talks
about his 80-gallon aquarium with Mollies, that get sick
about every 14-weeks, which is strange.
Evan from Colorado says
he bought some Amquel+, and it's worked Miracles in his
aquariums and fish bowls.
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