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Dissertations / Theses on the topic 'Antipredatory'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

JONES, DONNA CARLSON. "BIVALVE EPIBIONT ARMOR: THE EVOLUTION OF AN ANTIPREDATORY STRATEGY." University of Cincinnati / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1085085950.

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2

Jones, Donna C. "Bivalave epibiont armor the evolution of an antipredatory strategy /." Cincinnati, Ohio : University of Cincinnati, 2003. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=ucin1085085950.

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3

Jones, Adam C. "Defensive synergy : the antipredatory role of glass spicules in Caribbean Demosponges /." Electronic version (PDF), 2004. http://dl.uncw.edu/etd/2004/jonesa/adamjones.pdf.

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4

Itoh, Ryo. "Eavesdropping on heterospecific alarm calls as antipredatory tactics in Malagasy lizards." 京都大学 (Kyoto University), 2010. http://hdl.handle.net/2433/120693.

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5

Aslanzadeh, Shervin. "Risk perception and antipredatory behaviour of locusts and crickets versus predation strategies of Central netted dragon (Ctenopherus nuchalis)." Thesis, The University of Sydney, 2013. http://hdl.handle.net/2123/10091.

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Predation is among the selective forces that shape the phenotype and lifestyle of prey. Different prey types may show different antipredatory responses to the same predator or level of risk based on their ability to avoid predation. I tested antipredatory behaviour of prey species, the Australian plague locust, Chortoicetes terminifera, and the cricket, Acheta domestica, against a predator, the Central netted dragon, Ctenopherus nuchalis. Many theoretical and empirical studies suggest that increased safety has resulted in the evolution of aggregation or group living in prey species. I tested t

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6

Lapic, Whitney Alexandra. "An Asynchronous Mesozoic Marine Revolution: Drilling Versus Durophagy in Post-Paleozoic Echinoids." Miami University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=miami1619187876334553.

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7

Leaver, Jessica. "Options for eland: a multi-scale assessment of antipredatory responses of a vulnerable prey species to their dominant predator in the Eastern Cape, South Africa." Thesis, Nelson Mandela Metropolitan University, 2014. http://hdl.handle.net/10948/6570.

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Eland Tragelaphus oryx are the largest and slowest African antelope, falling within the preferred weight range of the prey of lions Panthera leo. Little is known, however, about the antipredatory strategies employed by eland. Rapid population declines in several small reserves following the reintroduction of lions suggest that the antipredatory strategies of eland may be compromised in spatially limited areas. This emphasises the need for research aimed at investigating how eland respond to lions, particularly in the spatial context, given that lions are increasingly being reintroduced into sm

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8

Tissier, Mathilde. "Conservation biology of the European hamster (Cricetus cricetus) : nutritional effects of crops on hamsters fitness and evaluation of their antipredatory behavior to upgrade wildlife underpasses." Thesis, Strasbourg, 2017. http://www.theses.fr/2017STRAJ022/document.

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Le Grand hamster (Cricetus cricetus), l’un des mammifères les plus menacés d’Europe, est en voie d’extinction en France. Toutefois, nous manquons d’information sur les causes de son déclin et sur comment améliorer sa conservation. Durant ma thèse, je me suis intéressée à l’effet des cultures sur la reproduction du hamster. Les principaux résultats indiquent qu’une consommation importante de maïs conduit à une diminution drastique du succès reproducteur en raison d’une carence en vitamine B3. Une autre étude démontre que des associations de cultures (blé-soja ou maïs-tournesol) sont favorables

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9

FitzGibbon, Clare Dorothea. "The antipredator behaviour of Thomson's gazelles." Thesis, University of Cambridge, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.292868.

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10

Arbuckle, Kevin. "On the macroevolution of antipredator defence." Thesis, University of Liverpool, 2015. http://livrepository.liverpool.ac.uk/2025420/.

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This thesis aims to improve our understanding of the macroevolutionary implications of antipredator defences, particularly with regard to how defence impacts biodiversity (including both species and trait diversity). To do this I took a phylogenetic comparative approach and used multiple study systems in an attempt to ensure the generality of my work. I begin by investigating how chemical defence and protective coloration influence ecology by testing for life history and ecological correlates of these defences (Chapter 1). Upon finding evidence for an increased niche space in chemically-defend

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11

Proctor, Carole. "Spatial models of antipredator vigilance in birds." Thesis, University of Sussex, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.323052.

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12

Burke, da Silva Karen. "Antipredator calling by the eastern chipmunk, Tamius striatus." Thesis, McGill University, 1993. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=68157.

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Chipmunk antipredator calls were examined during the summers of 1990 and 1991. The structural characteristics of the three calls, chipping, chucking and the trill, were obtained through taped recordings and sonagraphic analysis. Behavioural observations indicated that chucking by choruses of individuals occurs in the presence of aerial predators, chipping by choruses of individuals occurs in the presence of terrestrial predators and the trill is given by single individuals when fleeing from predators.<br>Experiments were carried out to determine the function of the trill and chipping. Demograp

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13

Snider, Madison R. "Antipredator Behavior and Morphology in Isolated Cyprinodont Fishes." Thesis, North Dakota State University, 2018. https://hdl.handle.net/10365/29880.

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For desert fishes in the American Southwest, predation by invasive species has triggered massive population declines for decades, leaving researchers speculating on the underlying cause. It has been shown that Post-Pleistocene isolation of desert fishes in small habitats with limited predation pressure has led to loss of antipredator traits. Determining the status of antipredator behavioral and morphological traits could identify the most vulnerable desert fishes. In aquatic ecosystems, detection and response to chemical alarm cues derived from epithelial tissue increases the probability of pr

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14

Howard, Simon William. "Effects of trout on galaxiid growth and antipredator behaviour." Thesis, University of Canterbury. Biological Sciences, 2007. http://hdl.handle.net/10092/1438.

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The introduction of trout has been implicated in the declines in native fish fauna in New Zealand and worldwide. Since the introduction of brown (Salmo trutta) and rainbow (Oncorhynchus mykiss) trout to New Zealand in 1867, their distribution has spread and they have been implicated in the fragmentation of native fish distributions, particularly native non-migratory galaxiids. However, in the Upper Waimakariri basin the co-occurrence of trout and galaxiid populations is relatively common, even in streams where trout reach sizes known to be piscivorous. To investigate mechanisms that may regula

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15

Lancaster, Lesley T. "Maternal effects as adaptations for organizing alternative social and antipredator strategies /." Diss., Digital Dissertations Database. Restricted to UC campuses, 2008. http://uclibs.org/PID/11984.

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16

Hollis-Brown, Lisa Anne. "Individual variation in the antipredator behavior of captive rhesus monkeys (Macaca mulatta) /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2005. http://uclibs.org/PID/11984.

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17

Armstrong, William Terry. "Predation and antipredator tactics of nesting black brant and lesser snow geese." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ27398.pdf.

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18

Dias, Cleide Rosa. "Foraging and antipredator behaviour in an acarine predator-prey system on tomato." Universidade Federal de Viçosa, 2013. http://locus.ufv.br/handle/123456789/3972.

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Made available in DSpace on 2015-03-26T13:30:46Z (GMT). No. of bitstreams: 1 texto completo.pdf: 596898 bytes, checksum: a54e884db6b018e150d389984ba546eb (MD5) Previous issue date: 2013-02-25<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>As plantas possuem mecanismos de defesa contra os ataques dos herbívoros. Estes mecanismos podem afetar diretamente os herbívoros, por exemplo, plantas podem produzir metabólitos secundários que reduzem ou param o desenvolvimento dos herbívoros, ou indiretamente por meio de interação com os inimigos naturais dos herbívoros. Plantas atac

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19

Marion, Zachary Harrison. "Ecological efficacy of chemically-mediated antipredator defenses in the Eastern newt Notophthalmus viridescens." Thesis, Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/34856.

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Frogs, toads, and salamanders are well known for harboring an array of distasteful (and poisonous) secondary metabolites, presumably as antipredator defenses; yet few experiments have rigorously demonstrated the efficacy of amphibian chemical defenses against ecologically relevant consumers. For example, despite an absence of rigorous statistical evidence showing their distastefulness to predators, eastern newts (Notophthalmus viridescens (Rafinesque))--a common salamander in lentic North American habitats--are assumed to tolerate diverse predator assemblages because newts secrete tetrodotoxin

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20

Hanson, Anne Lela Fullerton. "Plasticity and tonic processes in the antipredator behavior of rock squirrels (Spermophilus variegatus) /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2003. http://uclibs.org/PID/11984.

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21

Dunlop, Katherine Leigh. "Antipredator Responses to the Non-Native African Jewelfish, Hemichromis letourneuxi, by Naive Everglades Prey." NSUWorks, 2011. http://nsuworks.nova.edu/occ_stuetd/205.

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Novel predator introductions are thought to have a significant impact on the survival and fitness of naïve prey, especially in freshwater systems. The ability of prey to recognize and respond appropriately to these novel threats may depend on the prey’s use of general or specific cues to detect predation threats. We used laboratory behavioral experiments to examine the ability of three native Everglades prey species (Eastern mosquitofish, Gambusia holbrooki, flagfish, Jordanella floridae, and riverine grass shrimp, Palaemonetes paludosus) to respond to the presence and to the sensory cues of a

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22

Fisher, Kimberly A. "Antipredator Strategies of Striped Skunks in Response to Cues of Aerial and Terrestrial Predators." Thesis, California State University, Long Beach, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10690777.

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<p> Prey species defend themselves behaviorally and morphologically, and often utilize varied antipredator strategies against dissimilar predator types (i.e. terrestrial vs. aerial). Striped skunks <i>(Mephitis mephitis) </i> spray noxious secretions at predators and advertise this danger with deterrent behaviors and black-and-white aposematic coloration. Evidence suggests skunks are effective at deterring terrestrial mammalian predators but are vulnerable to aerial predators; how skunks assess the risk posed by different predator types, however, has not been examined empirically. I recorded t

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23

Taylor, David A. "Ecological and phylogenetic characteristics of consumed red-backed salamanders influence antipredator behavior of conspecifics." Diss., Online access via UMI:, 2006.

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24

Lingle, Susan Harrison. "Antipredator behaviour, coyote predation and habitat segregation of white-tailed deer and mule deer." Thesis, University of Cambridge, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.624840.

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25

Bleakley, Bronwyn H. "Indirect genetic effects of social environment influence the expression of antipredator behavior in guppies, Poecilia reticulata." [Bloomington, Ind.] : Indiana University, 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3277974.

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Thesis (Ph.D.)--Indiana University, Dept. of Biology, 2007.<br>Source: Dissertation Abstracts International, Volume: 68-09, Section: B, page: 5787. Adviser: Edmund D. Brodie, III. Title from dissertation home page (viewed May 9, 2008).

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26

Watts, James C. "Diel Patterns of Foraging Aggression and Antipredator Behavior in the Trashline Orb-weaving Spider, Cyclosa turbinata." Digital Commons @ East Tennessee State University, 2014. https://dc.etsu.edu/etd/2334.

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Few studies have rigorously assessed the adaptive value of diel rhythms in animals. We laid the groundwork for assessing the adaptive rhythm hypothesis by assaying diel rhythms of foraging and antipredator behavior in the orb-weaving spider Cyclosa turbinata. When confronted with a predator stimulus in experimental arenas, C. turbinata exhibited thanatosis behavior more frequently and for longer durations during the day. However, assays of antipredator response within webs revealed more complex diel patterns of avoidance behaviors and no pattern of avoidance behavior duration. Assays of prey c

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27

Morishita, Vanessa Rimoli [UNESP]. "Resposta comportamentiais do ouriço-do-mar preto a pistas químicas que indicam risco de predação." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/99399.

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Made available in DSpace on 2014-06-11T19:30:12Z (GMT). No. of bitstreams: 0 Previous issue date: 2010-01-29Bitstream added on 2014-06-13T19:39:29Z : No. of bitstreams: 1 morishita_vr_me_botib.pdf: 211575 bytes, checksum: a3ab5818527a4bb08b91f5efcd53a520 (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Ouriços-do-mar são capazes de avaliar o ambiente externo a partir de pistas químicas, por meio de quimiorreceptores presentes em seus espinhos, pés ambulacrários e pedicelárias. Neste estudo, utilizamos pistas químicas que indicam potencialmente o risco de predaç

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28

Kojima, Yosuke. "Active foraging for toxic prey and chemical protection of offspring by females of Rhabdophis tigrinus." 京都大学 (Kyoto University), 2014. http://hdl.handle.net/2433/188515.

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29

Morishita, Vanessa Rimoli. "Resposta comportamentiais do ouriço-do-mar preto a pistas químicas que indicam risco de predação /." Botucatu : [s.n.], 2010. http://hdl.handle.net/11449/99399.

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Orientador: Rodrigo Egydio Barreto<br>Banca: Gilson Luiz Volpato<br>Banca: Ronaldo Adriano Christofoletti<br>Resumo: Ouriços-do-mar são capazes de avaliar o ambiente externo a partir de pistas químicas, por meio de quimiorreceptores presentes em seus espinhos, pés ambulacrários e pedicelárias. Neste estudo, utilizamos pistas químicas que indicam potencialmente o risco de predação de maneira diretas (odor de predador) ou indiretas (odor de coespecífico injuriado fisicamente) para avaliar os padrões de resposta de Echinometra lucunter. Num primeiro experimento, avaliamos a respostas dos ouriços

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30

Saborse, Jacob A. "Cultural Breakdown of Learned Avian Alarm Calls: Implications to Management and Conservation." Youngstown State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1321976985.

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31

Rooney, Brigit. "Tourism and African Elephant (Loxodonta Africana) Behavior in Zambezi National Park, Zimbabwe." TopSCHOLAR®, 2019. https://digitalcommons.wku.edu/theses/3123.

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As charismatic megafauna and a flagship species, African elephants (Loxodonta africana) are vital to the African tourist economy. Conversely, high levels of wildlife tourism can induce behavioral shifts that push desired animals into less frequented areas and disrupt natural behaviors. In order to examine this trade-off, tourism levels and African elephant behaviors were studied in Zambezi National Park (ZNP) near Victoria Falls, Zimbabwe. Over the course of 14 weeks, in-person observations and camera traps in ZNP were used to collect geographic, demographic, and behavioral data from elephant

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32

Dawson, Sarah Shawnee. "Cognitive Inference and Resulting Behaviors in Response to Ambiguous Threat in the Coyote, Canis latrans." DigitalCommons@USU, 2009. https://digitalcommons.usu.edu/etd/249.

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While antipredator strategies have been a focus of behavioral research for decades, scientists generally study the responses of prey toward overt, explicit threat. However, risk can also be significant when a threat is covert, such as when an ambush predator may be nearby or a secondary threat remains after a predator's departure. Little is known about the mechanism that prey use to assess risk in a predator's absence. Tests were conducted to determine the manner in which coyotes respond to these ambiguous threats. Specifically, I tested whether coyotes respond to prior anthropogenic activ

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33

SPATAFORA, Davide. "ROLE OF BEHAVIOUR IN MARINE ORGANISMS: POTENTIAL EFFECTS UNDER FUTURE OCEAN CONDITIONS." Doctoral thesis, Università degli Studi di Palermo, 2021. http://hdl.handle.net/10447/515055.

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Over the last 250 years, the intensive burning of fossil fuels along with industrial processes and land uses (e.g. clearing forests and agriculture) has contributed to an increase in atmospheric CO2 from approximately 280 to 410 ppm, with a further increase (from 730 to 1020 ppm) projected by the end of this century. About 30% of the anthropogenic CO2 has been absorbed by the ocean, with a consequent decrease of the ocean’s surface pH causing a phenomenon better known as Ocean Acidification (OA). The average pH of the surface ocean has declined from 8.2 by 0.1 units since pre-industrial times

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34

Eiras, José Carlos Lisbôa Recarey. "Food web dynamics under indirect effects mediated by trait and density." Laboratório Nacional de Computação Científica, 2009. http://www.lncc.br/tdmc/tde_busca/arquivo.php?codArquivo=200.

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Predation, classically described as the negative eﬀect of the predator on the density of their prey, will be examined for their eﬀects on the behavior of prey,in the form of antipredator responses. Antipredator responses may arise on the morphology, physiology and/or the behavior of prey, by predation or by the mere presence of the predator, in this case called non-lethal predator. In this context we mainly examine the eﬀect of predators on foraging and change of habitat of their prey, as a antipredator response. Through the diversity of models surveyed, we exam the dynami

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35

Dutour, Mylène. "Communiquer entre espèces pour faire face au prédateur : le cas des cris de harcèlement chez les passereaux." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSE1251/document.

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Si le signalement du prédateur provoque le plus souvent la fuite des proies, il induit parfois un comportement particulier incitant la proie à s’approcher du prédateur et le harceler pour provoquer son départ plutôt que de se mettre hors de sa portée. Ce comportement de harcèlement s’accompagne de l’émission d’un signal hétérospécifique conduisant de nombreuses espèces à venir harceler le prédateur. L’objectif de mon travail de thèse est de comprendre comment est régi le transfert d’informations entre plusieurs espèces de passereaux dans le cas du comportement de harcèlement d’un prédateur. Me

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36

Eiras, José Carlos Lisbôa Recarey. "Dinâmica de redes tróficas sob efeitos indiretos mediados por traço e densidade." Laboratório Nacional de Computação Científica, 2009. https://tede.lncc.br/handle/tede/126.

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Made available in DSpace on 2015-03-04T18:51:18Z (GMT). No. of bitstreams: 1 TESE_PORTUGUES_JOSE_CARLOS.pdf: 4654107 bytes, checksum: 9ffae601e2a71b27032455457d38fe96 (MD5) Previous issue date: 2009-04-01<br>Predation, classically described as the negative eﬀect of the predator on the density of their prey, will be examined for their eﬀects on the behavior of prey,in the form of antipredator responses. Antipredator responses may arise on the morphology, physiology and/or the behavior of prey, by predation or by the mere presence of the predator, in this case called non-lethal predator. In

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37

Citadini, Jessyca Michele. "Coevolução do comportamento antipredatório, desempenho locomotor e morfologia em anuros da Floresta Atlântica." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/41/41135/tde-11042017-165341/.

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Anfíbios anuros representam um grupo de vertebrados cujo plano corpóreo apresenta uma série de modificações associadas ao desempenho locomotor através de saltos, sendo estas especializações muito antigas e conservadas filogeneticamente. Embora estudos comparativos venham demonstrando associações entre desempenho de salto e diversidade de habitat e história de vida para esse grupo filogenético, as relações entre o desempenho locomotor e o comportamento antipredatório dentro do contexto da diversificação do uso do micro-habitat permanecem inexploradas. Primeiramente, nós testamos modelos adaptat

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38

Hill, Jennifer Marie. "Predator biomass and habitat characteristics affect the magnitude of consumptive and non-consumptive effects (NCEs): experiments between blue crabs, mud crabs, and oyster prey." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/41172.

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Recent research has focused on the non-lethal effects of predator intimidation and fear, dubbed non-consumptive effects (NCEs), in which prey actively change their behavior and habitat use in response to predator chemical cues. Although NCEs can have large impacts on community structure, many studies have ignored differences in predator population structure and properties of the natural environment that may modify the magnitude and importance of NCEs. Here, I investigated the roles of predator size and density (i.e. biomass), as well as habitat characteristics, on predator risk assessment and

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39

Eklöv, Peter. "Effects of behavioural flexibility and habitat complexity on predator-prey interactions in fish communities." Doctoral thesis, Umeå universitet, Ekologi och geovetenskap, 1995. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-101769.

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40

Silva, Erika Portela de Lima. "Causas proximais da coexistência de duas espécies simpátricas de aranhas errantes do gênero Ctenus (Ctenidae): percepção de habitats, presas e predadores." Universidade Federal do Amazonas, 2012. http://tede.ufam.edu.br/handle/tede/3633.

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Made available in DSpace on 2015-04-22T22:12:47Z (GMT). No. of bitstreams: 1 Erika Portela de Lima Silva.pdf: 770664 bytes, checksum: b6b83b117ec0ee88c1214d68278a1c6f (MD5) Previous issue date: 2012-03-30<br>CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>The study of the interaction between pairs of species is the basis for understanding the coexistence in biological communities. The ability to select habitats may be important in the coexistence of competing species and in the interactions between predators and prey. This selection is often associated with the capac

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41

Salas, Alex Cortada. "Intraspecific variation in lizard's antipredatory Behaviour." Master's thesis, 2016. https://repositorio-aberto.up.pt/handle/10216/90933.

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Salas, Alex Cortada. "Intraspecific variation in lizard's antipredatory Behaviour." Dissertação, 2016. https://repositorio-aberto.up.pt/handle/10216/90933.

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43

Staňková, Jana. "Antipredační a explorační chování jako projev personality u gekončíků (Eublepharis macularius)." Master's thesis, 2014. http://www.nusl.cz/ntk/nusl-337656.

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This thesis "Antipredatory and exploratory behavior as an expression of personality in Leopard (Eublepharis macularius)" focuses on behavior Leopard gecko (Eublepharis macularius) in the exploratory and antipredation test. The aim is to determine whether some of the symptoms are characteristic of personality Leopard. The theoretical part will demonstrate the concept of personality. What are the terms for it to be about the phenomenon say that it is an expression of personality. We will deal with the various attempts used. The practical part will focus on the design of individual experiments an

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44

Bohanan, Robert Edward. "The efficacy of case construction as an antipredatory behavior for some lotic Chironomidae costs and benefits /." 1988. http://catalog.hathitrust.org/api/volumes/oclc/18605741.html.

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Thesis (Ph. D.)--University of Wisconsin--Madison, 1988.<br>Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

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Kutinová, Lucie. "Reakce naivních primátů na hady: experimenty s vybranými druhy chovanými v Zoo Praha." Master's thesis, 2010. http://www.nusl.cz/ntk/nusl-296637.

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In the wild, snakes are known to elicit strong antipredator responses in primates. Primates often mob the snakes, which is also accompanied by loud calls. In evolution, the deadly threat posed by snakes goes as far as to the origin of placental mammals. In this study, the reactions of naïve individuals to snakes were tested. Naïve pigtail macaques (Macaca nemestrina) and mouse lemurs (Microcebus murinus) avoided the snake stimulus. For the macaques there was a longer latency to touch the rubber snake compared to the latency to touch the rubber lizard. The mouse lemurs avoided feeding on the si

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46

Raška, Jan. "Pavouci jako zdroje a příjemci antipredačních varovných signálů." Doctoral thesis, 2019. http://www.nusl.cz/ntk/nusl-404514.

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The introductory part of this thesis sums up the state of knowledge on aposematism and mimicry, the effect of aposematic and mimetic signals on spider predators, and cases when spiders do not receive but send such signals. Attachments of the thesis include four original manuscripts. In the first study, we presented jumping spiders (Evarcha arcuata, Salticidae) with different colour forms (red-and-black, yellow-and-black, white-and-black) of the firebug (Pyrrhocoris apterus, Pyrrhocoridae). Our goal was to compare reactions of the spiders to various intensity of aposematic signalization, expect

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Součková, Tereza. "Antipredační chování ťuhýka obecného: role klíčových znaků v rozpoznávání predátora." Master's thesis, 2011. http://www.nusl.cz/ntk/nusl-312763.

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This thesis summarizes findings on a recognition and categorization of different sorts of stimuli at birds, it deals with predator recognition in the Red-backed Shrike (Lanius collurio) in its practical part. The aim of my study was to examine if Red-backed Shrikes follow by sign stimuli or colour of stimulus during the predator recognition. I performed my research by means of experiments with dummies, I have observed antipredatory reactions of Red-backed Shrikes on various types of dummies which differ in the presence or absence of features of raptor or in the different coloration. I conclude

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Pipek, Pavel. "Antipredační funkce fulgurace u ploštic (na příkladu druhu Coreus marginatus)." Master's thesis, 2010. http://www.nusl.cz/ntk/nusl-296220.

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1 Abstract Aim of the present study was to test antipredatory function of fulguration (or flash display), which means sudden exposition of conspicous body part on otherwise cryptic animal during escape. Adult squash bugs (Coreus marginatus; Heteroptera) were used as model prey, while as model predator served two species of passerine birds - blue tit (Cyanistes caerulus) and great tit (Parus major). Three approaches were undertaken. Test of palatability should have assessed the efficiency of squash bug chemical defence against bird predators. Experiment was carried out in experimental cage with

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Roure, EC. "Flexibility in antipredator behaviour of Tasmanian macropods to altered devil abundance." Thesis, 2019. https://eprints.utas.edu.au/34775/1/Roure_whole_thesis.pdf.

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Trophic cascades have been occurring at an increased rate due to the global decline of top predators. Top predators are important in maintaining the biodiversity of ecosystems through their top-down influence on prey species, both consumptive via predation which affects population vital rates and behavioural in response to the risk of predation. Predator presence and density is known to have strong influence on prey behaviour and demographics. Antipredator, or risk-sensitive, behaviours of prey individuals reflect their perceived level of threat in the environment. Behavioural responses in pre

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Duquette, Shelly. "Ecological effects of inducible antipredator defense in the ciliated protist euplotes." Thesis, 2005. http://hdl.handle.net/1828/1743.

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Inducible defenses alter the strength of interaction in food webs. Theoretical models that incorporate their effects are therefore critical for predicting community dynamics and stability. I examined ecological effects of an inducible morphological defense in a microbial model. I first investigated the effect of genotype. number of predators, and previous exposure to predators on the speed and maximum level of defense for eight clones in three species of the ciliate Euplotes. The effectiveness of defense depends on both of these aspects of defense induction: therefore these traits should evolv

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