Copy of NANDINI BN FINAL 4 (2).pptx

Copy of NANDINI BN FINAL 4 (2).pptx

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  TUMKUR UNIVERSITY TUMAKURU DOS&R INZOOLOGY PAPER CPT-4.2 – ANIMAL BEHAVIOUR SEMINAR TOPIC – CHEMICAL COMMUNICATION IN REPTILES SUBMITTED TO: Miss SHARADA R GUEST FACULTY DOS&R IN ZOOLOGY TUMKUR UNIVERSITY TUMKURU SUBMITTED BY: NANDINI B N II YEAR MSc IV SEM DOS&R IN ZOOLOGY TUMKUR UNIVERSITY TUMKURU
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  CONTENT • Introduction • Typesof communication • Modes of communication • Chemical communication in reptiles • Conclusion • Reference
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  INTRODUCTION ▪ Communication isthe transfer of information from one animal to another. • The animal which sends the signal is called Signaller and the animal that receives the signal is called Receiver. • Behaviour emitted by the signaller is called signal. • Animal communication is also known as Biological communication.
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  TYPES OF COMMUNICATION ▪Intraspecific communication Communication within a single species Eg:Honey bee dance • Interspecific communication Communication between two different species Eg:warning to colouration in wasps.
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  MODES OF COMMUNICATION ▪Visual Communication ▪ Acoustic Communication ▪ Tactile Communication ▪ Chemical Communication
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  VISUAL COMMUNICATION ▪ Itis important communication because a large amount of information can be conveyed in a short time. ▪ Most animals with well- developed eyes have colour vision.(Eg:Molluscs,Arthropoda) ▪ Many fishes, reptiles, and birds exhibit brilliant colour patterns that usually have a signaling function. ▪ Signals includes: :Facial expression, Colour identification, Posture, Light etc…
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  ACOUSTIC COMMUNICATION ▪ Arthropodsand vertebrates commonly use acoustic or sound communication. ▪ These animals must expend energy to produce sounds, but sounds can be used during night or day. ▪ Sound waves also have the advantage of travelling around objects, and may be produced or received while an animal is in the open or concealed. ▪ Eg: Calls of mammals and birds
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  TACTILE COMMUNICATION ▪ Tactilecommunication refers to the communication between animals in physical contact with each other. ▪ The antennae of many invertebrates and the touch receptors in the skin of vertebrates function in tactile communication. ▪ Eg: birds preaning the feathers of other birds primates grooming eachother
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  CHEMICAL COMMUNICATION • Chemicalcommunication is another common mode of communication. • Chemicals that are synthesized by one organism and they affect the behaviour of another member of same species are called pheromones. • Olfactor receptor in receiving animal usually detect chemical signal. • Unicellular organism with chemoreceptor can recognize their own species.
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  COMMUNICATION IN REPTILES •Chemical communication is a major facet of reptilian life. • For example, it is used in prey detection or foraging, predator detection, mate choice, alarm signaling, and territoriality. • Reptiles depend more on their chemical senses than any other class of vertebrates. • chemical signals are important in their communication and reproduction, so the study of chemical communication must be integral part of the research on the social behaviour of reptiles.
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  COMMUNICATION IN TURTLE •Turtle have well developed sense of smell, they also secretes pheromones from several sources. • One of the main organ including in chemical communication are mantal glands(MGs) located on the regions of the head. • They produce secretions that are involved in the mate choice. • The presence of use amount of galactose amine sugar residues in the vomero nasal receptors seems to be presembles functions in the chemoreception and transduction of pheromonal signals. • Eg: Pseudemys scripta
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  COMMUNICATION IN SNAKES •Snakes use their vomeronasal system to track pray, smell approaching predators and to communicate with others snakes by collecting the chemical cues that they emit. • Chemical cues are pheramones that are lipids left directly on substrate. • Eg: Garter snake
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  COMMUNICATION IN LIZARDS •The presence of chemicals contributes to how social groups of lizards maintain their colony, to recognize one another, for mating. • Many lizards posses structure on the ventral surface of the thigh called femoral pores. • Which exceeded a waxy secretion , it play very good role in communication, mating, marking territories. • It contains chemical called Hexadecanol. • Eg: Iguanas
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  ADVANTAGES • Usually providea simple message that can last for hours or days. • They are effective night or day. • They can pass around objects. • They may be transported over long distances. • They take relatively little energy to produce. DISADVANTAGES • The chemical signals are that they cannot be changed quickly and are slow to act.
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  CONCLUSION • Animals docommunicate which involves information transfer from the sender to a receiver. • They can convey their needs, desire, and reactions to the environment via some sophisticated signaling of their own. • No animals have however evolved the sophistication of the human language – communication system. • The understanding of animal communication is essential for understanding the animal world in general.
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  REFERENCES ▪ Rishikesh Gupta,Neeraj Kumar Arora, Animal Behaviour: Psychology, Ethology and Evolution .First edition [2013] Publication by Campus Books International New Delhi, Page num:(11- 13). ▪ Dr. VK Agarwal. Animal Behaviour(Ethology), S Chand publications (2009) New Delhi, Page num: (223-229). ▪ Lynne D Houck. Pheramone Communication in Reptiles, Oregon state university (2009) Corvallis oregon. ▪ https://www.researchgate.net/publication/378239746_Chemical_communication_i n_reptiles_Order_Squamata.[24/05/24] ▪ https://www.researchgate.net/publication/379924869_Chemical_communication_i n_reptiles_of_the_orders_testudines_crocodrylia_and_ryncochepalia.[24/05/24]
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  THANK YOU