Download or read book Mating Behavior and Mate Preference in Schizocosa Ocreata Wolf Spiders written by Stephanie S. Norton and published by . This book was released on 2001 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: Size, but different tuft sizes) simultaneously in a choice chamber once/day over 4 days. The repeatability of female preference varied with the nature of the choice. Female preference for larger tufts was significant and repeatable (r = 0.65) when choosing between an average male and one with reduced tufts, but not when choosing between an average male and one with enlarged tufts. This may be an indication of a threshold trait. To examine variation in receptivity with age post-adulthood, I studied responses of females to a courting male video. Receptivity varied significantly with age post-adulthood: females were more aggressive and less receptive to video images of courting males in the first week, became significantly more receptive after 3 weeks, and less thereafter. Correlated changes in aggressive and receptivity behavior may suggest a physiological linkage. These studies demonstrate the importance of female focused dies of sexual selection, indicating that the female predominantly controls the mating system of S. ocreata wolf spiders.
Download or read book Cognitive Cross modal Integration in a Wolf Spider Schizocosa Ocreata Hentz Lycosidae written by Elizabeth C. Kozak and published by . This book was released on 2015 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt: Across animal species, males convey important information to potential mates through signals in multiple sensory modalities. In order to choose the best possible mate, female receivers must accurately perceive and assess male multimodal signals, especially when those signals occur simultaneously with those of other males. Cross-modal integration, i.e., cognitive binding of information transmitted in more than one sensory signal mode, is therefore important in animal communication, especially in complex, noisy environments in which many signals overlap. However, it is currently unknown how perception of multiple, disparate male signals plays a role in female mate choice decisions, especially for invertebrates. Males of the brush-legged wolf spider Schizocosa ocreata (Hentz) use multimodal communication (visual and vibratory signals) in courtship. Because female S. ocreata may be courted by multiple males at the same time, they must evaluate co-occurring male signals originating from separate locations. Moreover, due to environmental complexity, individual components of male signals may be occluded, altering detection of sensory modes by females. While experiments with live spiders and video playback have shown that female Schizocosa ocreata wolf spiders display receptivity to males courting in either isolated signal mode and show increased receptivity for multimodal courtship, it is unknown whether this is the case when females are presented with a choice between multimodal vs. isolated unimodal male courtship signals, and how these preferences are affected by disparity between signals. I first used digital multimodal playback to present females with a choice between 1) isolated unimodal (visuaI or vibratory), 2) multimodal vs. vibratory, and 3) multimodal vs. visual male courtship signals. I next used digital multimodal playback to investigate the effect of spatial and temporal disparity of visual and vibratory components of male courtship signals on female mate choice, and presented females with male courtship signals consisting of components that varied in spatial location or temporal synchrony. When presented with a choice between either isolated unimodal male courtship signal (visual or vibratory), there was no significant difference in the average number of receptive displays directed to either male signal. When presented with a choice between a multimodal male courtship signal and a vibratory male courtship signal, females directed, on average, significantly more receptive displays to the multimodal signal. However, when presented with a choice between multimodal and visual-only male courtship signals, there was no significant difference in receptivity directed by females to either signal, in contrast with the prediction generated from previous research. Females responded to spatially disparate signal components separated by e"90° as though they were separate sources, but responded to slightly disparate signals separated by d"45° as though they originated from a single source. Responses were seen as evidence for cross-modal integration. Temporal disparity (synchrony) in signal modes also affected female receptivity. Females responded more to male signals when visual and vibratory modes were in synchrony than either out-of-synch or interleaved/alternated. These findings are consistent with those seen in both humans and other vertebrates, and provide insight into how animals overcome communication challenges inherent in a complex environment.
Download or read book Coercive Male Mating Behavior in the Brush legged Wolf Spider Schizocosa Ocreata Hentz written by Julianna L. Johns and published by . This book was released on 2007 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coercive (forced) mating has evolved in many animal species because it likely increases male fitness. Coercive male mating behavior is uncommon in spiders, as females are larger and potentially cannibalistic. In Schizocosa ocreata (Hentz) wolf spiders, females usually respond to male courtship with receptivity, although males sometimes force unreceptive females to copulate. Multivariate analysis of mating trials revealed distinct behavior patterns (e.g., aggressive male behavior; female resistance) allowing designation as coercive vs. cooperative. Males were also observed to use fangs during coercive mating, resulting in hemolymph loss and scarring in females (not seen in unmated females, and less frequent in other matings). Experimental immobilization of male fangs resulted in no significant difference in mating success, but reduced copulation duration compared to controls. The frequency of coercion in this species (11.7% of matings) suggests a possible alternative male behavioral tactic in response to female resistance.
Download or read book The Role of Context and Comparative Evaluation in Female Mate Choice Decisions of Schizocosa Ocreata Hentz written by Emily Logan Galbraith and published by . This book was released on 2008 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research examined how female Schizocosa ocreata wolf spiders evaluate complex and conflicting information in mate choice. In one study, spiders showed hierarchical preference for single male traits as magnitude increased, but when traits were co-varied, preference patterns differed based on pairing of males. This suggests that females use comparative evaluation, assessing males relatively rather than using fixed scores. In a second study, context effects were tested by adding an alternative to a choice set such that one of the original choices asymmetrically dominated the new option. Preference for particular individuals subsequently varied based on the traits of all males present, suggesting that female preference differs with context, depending on male number and relative quality. Both studies indicate that choice context and comparative evaluation are present in this species. These studies are likely the first to test for such effects in mate choice using theories from economics and animal foraging.
Download or read book Mate Recognition in Wolf Spiders written by Melissa Ann Orr and published by . This book was released on 2001 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sexual selection and species-recognition are two different processes that can lead to behavioral reproductive isolation. The wolf spiders Schizocosa ocreata and S. rovneri are ethospecies which use distinct multi-modal courtship behavior, containing both visual and vibratory components, to maintain separation. Interspecific hybrids, which can be produced in the lab, perform a courtship display containing key multi-modal elements of both parental species. Without accounting for the multi-modal facets of courtship, laboratory experiments have found that male and female hybrids are behaviorally sterile when paired with either parental species (Stratton & Uetz, 1986). The present study isolates the cues necessary for species recognition in S. ocreata, S. rovneri, and hybrid females. Responses to heterospecific males (mate recognition errors) increase when S. ocreata and S. rovneri females are presented with only one communication mode from heterospecific males. When females are presented with hybrid males, however, results vary. Female S. ocreata and S. rovneri are receptive to hybrids in half of the trials when both primary and secondary cues are present, but show species differences in response across modes. Hybrid females respond less to all courting males, but show the highest receptivity to S. rovneri vibratory courtship. Analysis of the pattern of hybrid male behavior suggests that hybrid males behave in a manner more similar to the species typical behavior of their paternal parent. This study indicates that key species recognition elements are communicated in different sensory systems between the two spider species. These data suggest a potential for natural hybridization under conditions where one mode of communication is absent or constrained and raise questions about the importance of multiple modes of communication.
Download or read book Descriptions of North American Araneae of the Families Lycosidae and Pisauridae written by Thomas Harrison Montgomery and published by . This book was released on 1904 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Domestic Dog written by James Serpell and published by Cambridge University Press. This book was released on 1995 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: A scientific analysis of dogs, their behaviour, and their relationships with humans.
Download or read book Spider Behaviour written by Marie Elisabeth Herberstein and published by Cambridge University Press. This book was released on 2011-01-27 with total page 417 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spiders are often underestimated as suitable behavioural models because of the general belief that due to their small brains their behaviour is innate and mostly invariable. Challenging this assumption, this fascinating book shows that rather than having a limited behavioural repertoire, spiders show surprising cognitive abilities, changing their behaviour to suit their situational needs. The team of authors unravels the considerable intra-specific as well as intra-individual variability and plasticity in different behaviours ranging from foraging and web building to communication and courtship. An introductory chapter on spider biology, systematics and evolution provides the reader with the necessary background information to understand the discussed behaviours and helps to place them into an evolutionary context. Highlighting an under-explored area of behaviour, this book will provide new ideas for behavioural researchers and students unfamiliar with spiders as well as a valuable resource for those already working in this intriguing field.
Download or read book Biology of Spiders written by Rainer Foelix and published by OUP USA. This book was released on 2011-05-05 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the only books to treat the whole spider, from its behavior and physiology to its neurobiology and reproductive characteristics, Biology of Spiders is considered a classic in spider literature. First published in German in 1979, the book is now in its third edition, and has established itself as the supreme authority on these fascinating creatures. Containing five hundred new references, this book incorporates the latest research while dispelling many oft-heard myths and misconceptions that surround spiders. Of special interest are chapters on the structure and function of spider webs and silk, as well as those on spider venom. A new subchapter on tarantulas will appeal especially to tarantula keepers and breeders. The highly accessible text is supplemented by exceptional, high-quality photographs, many of them originals, and detailed diagrams. It will be of interest to arachnologists, entomologists, and zoologists, as well as to academics, students of biology, and the general reader curious about spiders.
Download or read book Sperm Competition and the Evolution of Animal Mating systems written by Robert L. Smith and published by Elsevier. This book was released on 2012-12-02 with total page 710 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sperm Competition and the Evolution of Animal Mating Systems describes the role of sperm competition in selection on a range of attributes from gamete morphology to species mating systems. This book is organized into 19 chapters and begins with the conceptualization of sperm competition as a subset of sexual selection and its implications for the insects. The following chapter describes the relationship between multiple mating and female fitness, with an emphasis on determining the conditions under which selection on females is likely to counteract selection on males for avoiding sperm competition. Other chapters consider the female perspective on sperm competition; the evolutionary causation at the level of the individual male gamete; and the correlation of high paternal investment and sperm precedence in the insects. The remaining chapters are arranged phylogenetically and explore the sperm competition in diverse animal taxa, such as the Drosophila, Lepidoptera, spiders, amphibians, and reptiles. These chapters also cover the evolution of direct versus indirect sperm transfer among the arachnids or the problem for kinship theory presented by multiple mating and sperm competition in the Hymenoptera. This book further discusses the remarkable potential for sperm competition among certain temperate bat species whose females store sperm through winter hibernation and the mixed strategies and male-caused female genital trauma as possible sperm competition adaptations in poeciliid fishes. The concluding chapter examines the predictions concerning testes size and mating systems in the primates and the possible role of sperm competition in human selection. This book is of great value to reproductive biologists and researchers.
Download or read book Spider Communication written by Peter N. Witt and published by Princeton University Press. This book was released on 2014-07-14 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concentrating on the complex spider communication system, this book assembles the most recent multidisciplinary advances of leading researchers from many countries to assess the peculiar role spiders play in the animal kingdom. Originally published in 1982. The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.
Download or read book Chemical Communication in Crustaceans written by Thomas Breithaupt and published by Springer Science & Business Media. This book was released on 2010-11-25 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt: The crustaceans are ecologically and economically important organisms. They constitute one of the dominant invertebrate groups on earth, particularly within the aquatic realm. Crustaceans include some of the preferred scientific model organism, profitable aquaculture specimen, but also invasive nuisance species threatening native animal communities throughout the world. Chemoreception is the most important sensory modality of crustaceans, acquiring important information about their environment and picking up the chemical signals that mediate communication with conspecifics. Significant advances have been made in our understanding of crustacean chemical communication during the past decade. This includes knowledge about the identity, production, transfer, reception and behavioral function of chemical signals in selected crustacean groups. While it is well known that chemical communication is an integral part of the behavioral ecology of most living organisms, the intricate ways in which organisms allocate chemicals in communication remains enigmatic. How does the environment influence the evolution of chemical communication? What are the environmental cues that induce production or release of chemicals? How do individuals economize production and utilization of chemicals? What is the importance of molecule specificity or mix of a molecule cocktail in chemical communication? What is the role of chemical cues in multimodal communication? How does the ontogenetic stage, the sex or the physiological status of an individual affect its reaction to chemical cues? Many of these questions still represent important challenges to biologists.
Download or read book Studying Vibrational Communication written by Reginald B. Cocroft and published by Springer. This book was released on 2014-07-25 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume explains the key ideas, questions and methods involved in studying the hidden world of vibrational communication in animals. The authors dispel the notion that this form of communication is difficult to study and show how vibrational signaling is a key to social interactions in species that live in contact with a substrate, whether it be a grassy lawn, a rippling stream or a tropical forest canopy. This ancient and widespread form of social exchange is also remarkably understudied. A frontier in animal behavior, it offers unparalleled opportunities for discovery and for addressing general questions in communication and social evolution. In addition to reviews of advances made in the study of several animal taxa, this volume also explores topics such as vibrational communication networks, the interaction of acoustic and vibrational communication, the history of the field, the evolution of signal production and reception and establishing a common vocabulary.
Download or read book Alternative Reproductive Tactics written by Rui F. Oliveira and published by Cambridge University Press. This book was released on 2008-03-13 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of alternative reproductive tactics (the behavioural strategies used by individuals to increase their reproductive success) is an evolutionary puzzle, and one of great interest to researchers. For instance, why do some males guard both nest and eggs, while others sneak into nests while pairs are spawning and fertilise those eggs? The field offers a special opportunity to study the evolution and functional causes of phenotypic variation, which is a general problem in the field of evolutionary biology. By integrating both mechanistic (psychological) and evolutionary (behavioural ecology) perspectives and by covering a great diversity of species, Alternative Reproductive Tactics addresses this integrated topic of longstanding interest, bringing together a multitude of otherwise scattered information in an accessible form that is ideal for graduate students and researchers.
Download or read book Behaviour and Ecology of Spiders written by Carmen Viera and published by Springer. This book was released on 2017-11-02 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: Within the last few decades, arachnology in the Neotropical region has experienced a great development filling the knowledge gap in one of the most diverse regions of the world. Nevertheless, large geographical areas remain poorly sampled, especially within the Amazon, and new genera and species have been continuously discovered, even in urban areas. In congruence with the recent improvements in research, several aspects of the ecology, behaviour and natural history of spiders, such as interactions with other predators and parasitoids, social interactions, dispersal patterns, habitat requirements, mating behaviors, among others, are being carefully investigated. These recent contributions incorporate substantial information on the preexisting knowledge on these subjects every year. Our main objective with this book is to present a summary on these new researches and on the currently knowledge on the main subjects involved in the general theme, emphasizing the contribution of the rich fauna of the Neotropical region to the research of behaviour and ecology of the spiders.
Download or read book Spider Research in the 21st Century written by David Penney and published by . This book was released on 2013 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: The result is a great increase in multi-disciplinary research and novel avenues incorporating spiders as model organisms.
Download or read book Seismic Communication in a Wolf Spider written by Jeremy S. Gibson and published by . This book was released on 2005 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: I investigated the importance of the seismic component, substratum-borne vibrations, of the multimodal courtship display in the wolf spider Schizocosa ocreata (Hentz) (Araneae: Lycosidae). It is currently known that the visual signaling component of male multimodal courtship displays conveys condition-dependent information, and that females can use this signal alone in mate choice decisions. I found that isolated seismic signals are also used in mate choice, as females preferred males that were louder, higher pitched and with shorter signaling pulses. Results also showed that male seismic signals are dependent on current condition and may convey information about male size and body condition. Seismic signals and visual signals are likely redundant, although some aspects of seismic signals may convey different information, supporting both the redundant and multiple messages hypotheses.
