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Recovery from Heron Attack???
Fish eggs can be transported via animals or birds.
The eggs 'stick' to the fur or scaled feet of the critters and end up falling off in a new pond or water source. The eggs can also travel attached to vegetation which in turn is transported in animal coats or in their paws or feet. Ornamental ponders are always accidently sending off fish eggs in plants exchanges. Clams, mussels, insect larvae, tube worms, snails, leeches and amphibian eggs have also traveled via this method. This is probably what happened with your pond. A wildlife fish biologist could probably tell you if bullheads would out compete your bluegill and bass for food resources in your pond. I did find that small fish make up a small part of the bullhead diet. They make good use of varied food sources which makes them successful in turbid ponds. And two other significant facts One, they have few predators.: Black bullheads have large, sharp spines at the front of their dorsal (top) and pectoral (side) fins. When bothered, they lock them in a straight-out position making them very hard to swallow. These spines and the fishes' preference for eating mostly at night make black bullheads an uncommon prey for other fish. and as for algae and lack of clarity in your water right now, It is a hardy fish that tolerates turbid (muddy) water, warm temperatures, and low oxygen concentrations. The black bullhead can tolerate conditions many other types of fish cannot. Your pond's natural predilection is to fill in. It is mother nature's way of providing for fertile fields. Your pond has been following this path for 20 years now and its becoming more of a habitat that bullheads enjoy. It may be time to do some more excavating. A really good book dealhe book on maintenance and renewal of older ponds. Some starting as 'old' as ten years into the ponds life. Your pond at 20 years may be a candidate for this. Our pond is right at the edge of a 50 acre wetland. There is no stream inlet or outlet. When we had the pond dug the excavator said it was spring fed and you see two areas at the bottom that remained clear for years. The pond filled in a couple days and the level varies very little, even in the dry summer months. We bought the bluegills and bass from a fish hatchery and put in no bullheads. And didn't see any for 20 years or more. kathy :-) A HREF="http://www.onceuponapond.com/"Once upon a pond/A |
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