logging in or signing up Spiders and Ants ashhoque90 Download Post to : URL : Related Presentations : Let's Connect Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Copy embed code: Embed: Flash iPad Dynamic Copy Does not support media & animations Automatically changes to Flash or non-Flash embed WordPress Embed Customize Embed URL: Copy Thumbnail: Copy The presentation is successfully added In Your Favorites. Views: 54 Category: Entertainment License: All Rights Reserved Like it (0) Dislike it (0) Added: May 08, 2013 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript Jumping spider’s use of myrmecomorphy clouds distinction between aggressive and Batesian mimicry : Jumping spider’s use of myrmecomorphy clouds distinction between aggressive and Batesian mimicry By Ash HoquePowerPoint Presentation: Aggressive mimics fool their prey by imitating harmless species. Batesian mimics delude predators by imitating the warning signals of harmful species. Yellow Jacket: Left ( Model ) Clear wing moth : Right ( Mimic ): Interspecific resemblance is exhibited by many different organisms. Epitomes of Batesian mimicry bear warning signals of models to discourage predation from common predators. These warning signals include repulsive skin, venom, weapons and other traits that are used to forfend predators.PowerPoint Presentation: Salticidae or jumping spider family belong to the phylum Arthropoda . The salticid genus Myrmarachne exhibits myrmecomorphy, an anomaly in which organisms mimic ants morphologically and/or behaviorally.PowerPoint Presentation: Myrmarachne melanotarsa, an ant-like jumping spider exhibits both aggressive and Batesian mimicry. M. melanotarsa often preys on the eggs and juveniles of ant opposing salticid species.PowerPoint Presentation: Ants are well protected against most salticids and often use them for food. Salticids often prey on arthropods from the same family ( Salticidae ). Salticids have extraordinary visual acuity and identify the ants by their appearance, in an effort to avoid predation. Ant-like salticids from the genus Myrmarachne are also avoided by these salticids .PowerPoint Presentation: M. melanotarsa’s approach is scare off the parental ant opposing salticid in order to ransack nests for the eggs and “post-embryos .” M. melanotarsa is araneophagic, or preferable preys on spiders.PowerPoint Presentation: The hypothesis is that for M. melanotarsa, the discrepancy between aggressive and Batesian mimicry is obscured. It is predicted that Menemerus females will desert their nests containing post-embryos when they observe ants and that they will also desert their nests when they see M. melanotarsa , for they will not be able to discriminate between the two. This was tested by placing a female Menemerus sp., an ant-averse salticids species, and their young offspring within visual distance of M. melanotarsa , its model and several non-ant-like arthropods.PowerPoint Presentation: Upon noticing ants or ant mimics, Menemerus females deserted their infants more often than when observing non-ant-like arthropods or in control tests where no arthropods were present . This was predicted by the hypothesis that M. melanotarsa mimics ants as a predatory tactic.PowerPoint Presentation: The black shows number of times the Menemerus was found outside the nest, and grey shows the number of times it was inside the nest .PowerPoint Presentation: Another instance in which the discrepancy between Aggressive and Batesian mimicry is made indistinct is shown in a recent study of fangblennies (Cote & Cheney 2007). The fangblenny resembles a cleaner fish in order to safely approach the host fish, rather than eating the host’s parasites, the fangblenny eats the host. Resembling the cleaner fish also has a custodial purpose, as host fish are hesitant to fully strike back against what they feel is an insubordinate cleaner fish.PowerPoint Presentation: Fangblenny : Right Cleaner Fish : LeftReferences: References Nelson X. J., Jackson R. R. 2009. Aggressive use of Batesian mimicry by an ant-like jumping spider. Biology Letter 5: 755–757. Huang J., Cheng R., Li D., Tso I. 2010. Salticid predation as one potential driving force of ant mimicry in jumping spiders. Proceedings Of The Royal Society Biological Sciences 278: 1356-1364 You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.