The Brightness Of The Papilio Troilus During Larval Stage Affect The Survival Rate When They Encountered With Predators

1369 WordsNov 1, 20166 Pages
Student number: 1003487461 Week 1 Tuesday evening RM205 TA’s name Species number: 2 Does The Brightness in Coloration of The Papilio Troilus in Larval Stage Affect The Survival Rate When They Encountered with Predators? Introduction Papilio Troilus also known as the spicebush swallowtail, they will go through three stages of development in their larval phase. In the first stage, they resemble birds dropping in brown and white color. As they growing into their forth instar, they turning to a green-yellow color with black dots on their back to resemble snakes. When Troilus larvas nearly the pupate time their coloration changes again to deep orange. While the brown and white coloration of the larva in first instar can be considered as a form of mimicry, which encourage their predators to leave them alone, the bright green-yellow color of their forth instar can be recognized as aposematic, also known as warning color. (K.L.Prudic 2007) The specific color work with black dots on the back of those larvas, is mimicking the appearance of snake which is the natural enemy of their predator. Aposematic is a defensive strategy prey spices developed to increase their survival rate from predation. Coloration is one of the many ways to warning their potential predator, visually express their toxicity and unpalatability. (K.L.Prudic 2007) Both the beneficial function and mechanisms in molecular level of aposematic in the genus Papilio has been well researched and documented. (E.V. Zakharov

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