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Unit07 - Unit 7 in Entomology[1 For all of you fans of...

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Unit 7 in Entomology [1] For all of you fans of “Survivor” and “Lost”, this unit is for you. Unit seven, getting together and staying alive. [2] In this unit you will need to learn to name and describe five ways insects get together to mate. Using an example, describe each of the different ways insects protect themselves. You want to define two types of mimicry: Mullerian and Batesian, and also define and give examples of aposematic coloring behavior. In this unit you will watch several videos, so you will need to glean some information from these videos, so pay close attention to your study guide, so you know what to look for as you watch the video clips. [3] The primary goal of any organism, including insects, is to pass on its genes through reproduction. In order to do this, an organism must eat, grow and protect itself so that it can reproduce. Through this unit you will learn how insects find mates and protect themselves by examining five reproductive strategies and nine protective strategies. [4] First let's start with reproductive strategies. In unit six, you briefly learned how a female silk moth uses a sex pheromone to attract her mate. This is just one of many fascinating reproductive strategies insects employ to entice reproductive partners. We are going to discuss some specific mating strategies, but before we get started, be sure to read the reproduction section in your text. Some of the strategies are pretty racy. The five strategies to be discussed are looking good, smelling good, sounding sweet, lamp light, and buying love. [5] Are you intrigued? Well, let's start with looking good. Specific insects can rely only on their looks to attract a mate. Males will look for characteristics of his species and when he finds a female that matches his ideal, he mates with her, or vice versa. The more a potential mate looks like the visual ideal of the species, its chances for reproduction is much greater. At times, the one seeking the potential mate may mistakenly mate with the wrong species or a bottle as seen in the video clip about jewel beetles. Take a few minutes now to watch this video. (This has to be the all time class favorite of all the video clips that we watch.) This clip is entitled “Jewel Beetles and Their Beer Mates”. [6] (Video – Jewel Beetles and Their Beer Mates) Some insects use vision to find a mate. They’re attracted to simple good looks. A female jewel beetle flaunts her golden dimpled wing casing, which is irresistible to a male. She’s also big, which to him is beautiful. But in recent years, males have discovered other temptations. For a male jewel beetle, it’s the simple things that are exciting. If it’s orange and dimpled, it’s just what he’s looking for. It’s enormous. This must be a super female—a jewel beetle goddess! Only certain beer bottles have just the right color and texture. All the males in the area are besotted. The real females are ignored. With so many males “on the bottle”, the beetles were in danger of extinction, until the breweries began redesigning their bottles, hoping the males would spend some time with their females.
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