Saturday, May 9, 2009

SHOWING OFF MY PETS : POLYODON SPATHULA

I'm bored.

Tried doing stuff but my attention span is like very short tonight...

So as a challenging entertainment, I tried snapping photos of my American Paddlefish... Using my handphone camera! Yeap.. Of almost 30 odd pix... These two represent the best quality...

All others were chicken droppings only...

Top view- Looks like those saltwater half-beaks.


This is before it flips on its back to get the bloodworm.


So before anything else, an introduction to the species.


The American paddlefish, Polyodon spathula, also called the Mississippi paddlefish or spoonbill, lives in slow-flowing waters of the Mississippi River drainage system. It appears to have been extirpated from Lake Erie and its tributaries. They are closely related to the sturgeons. This large Chondrostian freshwater fish may grow to 220 cm (7 feet) and weigh up to 100 kg (220 pounds). The paddlefish takes its common and scientific names from its distinctive snout, which is greatly elongated and flattened into a paddle shape. The American paddlefish is believed to use sensitive electroreceptors on its paddle to detect prey, as well as to navigate while migrating to spawning sites. The paddlefish feeds primarily on zooplankton but also feeds on crustaceans and bivalves.


Once common throughout the Midwest, overfishing and habitat changes have caused major population declines; both the meat and roe of the paddlefish are desirable as food. Dams and other barriers can prevent the fish from recolonizing places where they once occurred and can deny them access to important critical habitats such as spawning areas. Until about 1900, the paddlefish was also found in the Lake Erie and in river systems tributary thereto in the US and Canada. Invasive species such as zebra mussels have reduced the number of zooplankton in the Great Lakes to such low levels that any hypothetical reintroduction program would seem likely to fail. Recently, paddlefish were spotted in the Danube river. It has not been determined whether these fished escaped from Romanian or Bulgarian fish farms during the 2006 European floods, or whether they were let into the Danube earlier and matured in the river.

The American paddlefish remains a popular sport fish in those parts of its range where populations are sufficient to allow harvesting. Since they are filter-feeders, paddlefish will not accept bait or lures and must be caught by snagging. Several states, including Missouri, have enacted stocking programs for these fish in reservoirs where the resident populations were low or nonexistent, or in areas where historical populations are no longer naturally sustainable. Paddle fish are killed for their eggs which are used as caviar.

Polyodon spathula is one of two living species of Paddlefish. The other one comes from China... It's an endangered species.

So since my handphone camera cannot manage to get some decent pix, I think I just post these instead.

This is what it looks like.


Sub-adult filter-feeding






A "small" adult female


So why keep Paddlefish? Well the first time I saw them was in the 90s when I used to go to Penang Island to this fish store near GAMA Supermarket.

They were VERY expensive at that time.

I think a 4" baby was about RM200++.

Then when I saw that Toboh managed to bring in 2, I bought them. Unfortunately 1 died when it was sucked into the filter inlet. Haih... Anyway, I covered the inlet with a box filter.

The 1 that I have now grew an inch after a month. Doing good I think. I feed it micro-pellet and frozen bloodworm.

It usually do some nifty back-flips when feeding which very cool to see.

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