Another interesting fact about angelfish is that they have an occupation in the fish world. Most of them act as cleaners for other fish and pick dead tissue from their bodies. This is not their food, though. Their diet consists mainly of sponge and algae.
One particular kind of angelfish, the blackspot angelfish, has a special capability that allows it to change gender from female to male. However, the change is not made at random; it happens for a specific reason. Angelfish live in groups, and each group has one male fish, which is blue in color, and four female fish, which are yellow. The male angelfish is the strongest and largest member of the group. He is the one who protects and looks after the females. When the male dies, the group needs a new “security guard.” This is when the largest female in the group begins to change in appearance. She begins to grow larger in size, and after a week, she starts changing color, from yellow to blue. Slowly, her behavior toward the other fish also changes. She begins behaving like a male. Two weeks later, black stripes appear on her body, indicating the gender change is complete. She is now completely male!
The totem pole can be grouped into specific categories, depending on its location and the occasion for which it was carved. Welcome poles were traditionally placed on village beachfronts to greet visitors arriving by canoe. Inside the homes of high-ranking chiefs is where house poles were found. The family’s history was carefully carved into each pole. Placed along the rear or front walls of a house, house poles also helped to support the main beam of the roof.
Memorial poles stood in front of a house. They were erected in memory of a deceased chief or a high-ranking clan member. The poles depicted the person’s accomplishments or family history. Mortuary poles were also raised to honor the dead, but they differed from memorial poles, having a burial box placed at the top of the pole. Inside the burial box were the remains of the deceased.
While many of these poles can still be found in various locations on the west coast of North America, there is one pole that can now only be found in a museum—the shame pole. Traditionally, shame poles were carved for a chief to embarrass and ridicule another who had done something wrong. Once the wrong was made right, the pole was taken down.
Totem poles are important expressions of specific Aboriginal cultures. Despite the threats posed by cultural and political encroachment of colonial forces, the art of totem pole carving has survived. Aboriginal carvers continue to carve totems as symbols of their cultural pride and clan kinship.
Ohio State University researchers tested three commercially sold foggers in a study on the effect of foggers on bedbugs. After testing these brands on five different groups of live bedbugs for two hours, the scientists saw that the foggers had little—if any—effect on the insects. The researchers said bedbugs hide in cracks and crevices such as under sheets and mattresses, or deep in carpets where foggers won’t reach. Moreover, bugs that do come in contact with the mist may be resistant to the pesticide.
Foggers, or bug bombs, should really be a measure of last resort. First of all, the gases used in bug bombs are highly flammable and thus pose a serious risk of fire or explosion if the product is not used properly. Second, once a bug bomb is used, every surface in your home will be covered with the toxic pesticide. When you use a bug bomb, a chemical mixture rains down on your counters, furniture, floors, and walls, leaving behind oily and toxic substances. Your health might thus be endangered. Therefore, it is suggested that people leave the problem to the professionals.