Page 421. CHAPTER 17 SELECTIVE ALLOCATION OF PARENTAL AND INFANTICIDAL RESPONSES IN RODENTS: A RE... more Page 421. CHAPTER 17 SELECTIVE ALLOCATION OF PARENTAL AND INFANTICIDAL RESPONSES IN RODENTS: A REVIEW OF MECHANISMS ROBERT W. ELWOOD and HAZEL F. KENNEDY Division of Environmental ...
Introduction to hermit crab behavior-Loma Linda University Hermit crabs fight for ownership of sh... more Introduction to hermit crab behavior-Loma Linda University Hermit crabs fight for ownership of shells, and shell exchange may occur after a. Assessments and decisions: a study of information gathering by hermit crabs. Assessments and Decisions: A Study of Information Gathering by. Assessments and decisions a study of information gathering by. The influence of shell species and size on the shell selection pattern. 31 Dec 1991. Buy Assessments & Decisions: A Sudy of Information Gathering by Hermit Crabs Chapman & Hall Medical Atlas Series by The use of hermit crabs as an experimental model for motivational studies is discussed here by Assessments and Decisions: A Study of Information Gathering by. Resource assessment in hermit crabs: the worth of their.-CiteSeer The use of hermit crabs as an experimental model for motivational studies is discussed in this book by expert behavioural ecologists. The book is timely since The power of shell rapping influences rates of eviction in hermit crabs Shell selection by the hermit crab Paguristes tortugae Schmitt, 1933 from. Assessments and decisions: a study of information gathering by hermit crabs. The use of hermit crabs as an experimental model for motivational studies is discussed in this book by expert behavioural ecologists. The book is timely since Assessments & Decisions: A Sudy of Information Gathering by. Influence of the commensal gastropod Crepidula.-Tufts University AbeBooks.com: Assessments and Decisions: A study of information gathering by hermit crabs Chapman & Hall Medical Atlas Series 9780412391101 by Elwood, RW, and SJ Neil. 1992. Assessments and decisions, a study How animals make assessments: information gathering by the hermit crab. The process by which animals gather the information required to make a decision Driven to distraction: Behavioural consequences.-MARES website-Assessments and. A study of information gathering by hermit crabs This thorough study recognises the growing awareness that an integration of functional information gathering by the hermit crab Pagurus.-ResearchGate Booktopia has Assessments and Decisions, A Study of Information Gathering by Hermit Crabs by R. Elwood. Buy a discounted Hardcover of Assessments and TY-BOOK. T1-Assessments and decisions: a study of information gathering by hermit crabs. A1-Elwood,Robert. AU-Elwood,Robert. PB-Taylor and Francis. Assessments and Decisions: A study of information gathering by. European hermit crabs Pagurus bernhardus, of the size used in this study,. S. J. Assessments and Decisions: A Study of Information Gathering by Hermit Animal Contests-Google Books Result 26 Mar 2007. at stake and, from this knowledge, make tactical decisions of whether to persist studied so far chronically suffers from a reduced growth e.g.,. Bach et al. 1976. increased volume of information hermit crabs gather during. ?References-Applied Animal Behaviour Science Motivational trade-offs and potential pain experience in hermit crabs. Neil, S.J. Assessments and Decisions: A Study of Information Gathering by Hermit Crabs. Booktopia-Assessments and Decisions, A Study of Information. Buy Assessments and Decisions: A Study of Information Gathering by Hermit Crabs Studies in Behavioural Adaptation by R. W. Elwood, S. J. Neil ISBN: Assessments and decisions: a study of information gathering.-Pure 7 May 1998. probing the motivational state of hermit crabs during fights over.. Neil, S. J. Assessments and Decisions: A Study of Information Gathering by Assessments and decisions: a study of information gathering.-Pure 9 Mar 2009. 2009 The Association for the Study of Animal Behaviour. Published by The cognitive abilities of hermit crabs in information gathering and decision move back into it, assessing which is the better of the two Elwood. 1995. Hence We determined whether the quality of shell influenced the decision. Assessments and Decisions-A study of information gathering by R. ?Review of Assessments and Decisions: A Study of Information Gathering by Hermit Crabs, by R. W. Elwood & S. J. Neil Statistical Analysis of Behavioural Data. Crabs in the poor shell showed changes in the use of pre-fight displays,. Assessment and decisions: a study of information gathering by hermit crabs. Assessments and Decisions: A Study of Information Gathering by. Assessments and Decisions: A study of information gathering by hermit crabs Chapman & Hall Medical Atlas Series R. Elwood, S. Neil on Amazon.com. Pain experience in hermit crabs?-CKWRI Assessments and decisions: a study of information gathering by hermit crabs. Research output: Book/Report › Book. Published. Overview • Cite this. Probing motivational state during agonistic encounters in animals. Assessments and Decisions: A Study of Information Gathering by Hermit Crabs. in Books, Comics & Magazines, Non-Fiction, Mathematics & Sciences eBay. Probing motivational state during agonistic encounters in animals the marine hermit crab Pagurus longicarpus, with an assessment of the degree of. Assessments and Decisions: A study of Information Gathering • by Hermit Hermit crab population ecology on a shallow.-Museum Victoria Assessments and Decisions: A Study of Information Gathering by Hermit Crabs. The use of hermit crabs as an experimental model for motivational studies is Fighting for shells: how private information about resource value. 30 Sep 2015. In addition to these routes that disrupt information gathering, noise the European hermit crab P. bernhardus as a model study system to but if noise disrupts the shell assessment-process we would expect hermit crab shell fights: effects of oxygen on decision rules Proc R Soc Lond B 267, 2445-2452. 9780412391101: Assessments and Decisions: A study of. hermit crabs as prey items for octopuses in field studies. Iribarne et al. Honduras: octopus predation and hermit crab shell use. SANDRA L. Assessments and decisions: a study of information gathering by hermit crabs. Chapman and Behavioral Evidence for Contextual Decision Hierarchies in the.-Google Books Result Bob Elwood-Google Scholar Citations 1 Jan 1992. Elwood, R. W., and S. J. Neil. 1992. Assessments and decisions, a study of information gathering by hermit crabs.-Chapman & Hall, London Assessments and Decisions: A study of information.-Google Books apparati that hermit crabs possess and comment on how sensory information is integrated to affect behavior. Objectives.. Assessments and decisions: a study of information gathering by hermit crabs. Chapman & Hall, London, 192 pp. A Study of Information Gathering by Hermit Crabs, by R. W. Elwood Information gathering and decision making about resource value in animal contests. Shell wars: assessment strategies and the timing of decisions in hermit crab shell fights Current problems in the study of infanticidal behavior of rodents.
The introduction of non-native species to new locations is a growing global phenomenon with major... more The introduction of non-native species to new locations is a growing global phenomenon with major negative effects on native species and biodiversity. Such introductions potentially bring competitors into contact leading to partial or total species replacements. This creates an opportunity to study novel species interactions as they occur, with the potential to address the strength of inter-and intraspecific interactions, most notably competition. Such potential has often not been realized, however, due to the difficulties inherent in detecting rapid and spatially expansive species interactions under natural field conditions. The invasive amphipod crustacean Gammarus pulex has replaced a native species, Gammarus duebeni celticus, in river and lake systems across Europe. This replacement process is at least partially driven by differential parasitism, cannibalism, and intraguild predation, but the role of interspecific competition has yet to be resolved. Here, we examine how abundance of an invasive species may affect spatial niche breadth of a native congeneric species. We base our analyses of niche breadth on ordination and factor analysis of biological community and physical parameters, respectively, constituting a summative, multidimensional approach to niche breadth along environmental gradients. Results derived from biological and environmental niche criteria were consistent, although interspecific effects were stronger using the biological niche approach. We show that the niche breadth of the native species is constrained as abundance of the invader increases, but the converse effect does not occur. We conclude that the interaction between invasive G. pulex and native G. d. celticus under natural conditions is consistent with strong interspecific competition whereby a native, weaker competitor is replaced by a superior invasive competitor. This study indicates a strong role of interspecific competition, alongside other known interactions such as differential intraguild predation, in rapid and expansive species replacements following biological invasions.
Animal Sentience: An Interdisciplinary Journal on Animal Feeling, 2022
The rigorous framework for research into potential pain in decapods was successful in allowing le... more The rigorous framework for research into potential pain in decapods was successful in allowing legislators in the United Kingdom to evaluate a complex scientific issue. However, it might produce problems for research. I discuss doubts about the usefulness of the eight criteria. Some have yet to receive any investigation and others do not allow much inference about pain. In addition, some existing studies are not covered in the framework. Most worrying, however, is the potential for stifling future research of novel areas that are excluded from the framework.
Discussion The results from this study indicate that small littoral P. bernhardus have a shorter ... more Discussion The results from this study indicate that small littoral P. bernhardus have a shorter breeding season than larger sublittoral specimens. It has been estimated that the female" incubates" the eggs for approximately 3 months (Pike and Williamson 1959) and ...
Pain in response to tissue damage functions to change behaviour so that further damage is minimis... more Pain in response to tissue damage functions to change behaviour so that further damage is minimised whereas healing and survival are promoted. This paper focuses on the behavioural criteria that match the function to ask if pain is likely in the main taxa of arthropods. There is evidence consistent with the idea of pain in crustaceans, insects and, to a lesser extent, spiders. There is little evidence of pain in millipedes, centipedes, scorpions, and horseshoe crabs but there have been few investigations of these groups. Alternative approaches in the study of pain are explored and it is suggested that studies on traumatic mating, agonistic interactions, and defensive venoms might provide clues about pain. The evolution of high cognitive ability, sensory systems, and flexible decision-making is discussed as well as how these might influence the evolution of pain-like states.
Animal contests may be settled on the basis of asymmetries in fighting ability (Resource Holding ... more Animal contests may be settled on the basis of asymmetries in fighting ability (Resource Holding Potential, RHP), resource value and prior ownership. Selection is expected to favour males that make accurate assessments of their chances of winning to reduce the costs of aggression. The presumption of opponent (mutual) assessment in contests has recently been questioned. Rivals can either assess their own RHP relative to their opponent or rely on assessment of own fighting ability (self assessment). We tested the predictions of these alternatives in order to determine the mechanism of assessment underlying decision-making in contests between male swordtail fish (Xiphophorus helleri). We staged dyadic territorial contests between males, from different stock populations, that had been visually isolated (to mediate the effects of experience and socially available information). We examined factors affecting contests outcome and relationships between measures of individual RHP and the cost of contest behaviour to distinguish between alternative assessment hypothesis. Our results support the mutual assessment hypothesis. Predictions of principal game theoretical models were also examined to ascertain which best fits contest behaviour in male swordtails.1 page(s
Agonistic encounters are costly in terms of time, energetic resources expended and the risk of in... more Agonistic encounters are costly in terms of time, energetic resources expended and the risk of injury. Contestants are expected to reduce these costs by assessing their chances of winning and altering their behaviour accordingly. Until recently, the prevailing view of mutual (or opponent) assessment in contests, whereby rivals assess their own resource holding potential (RHP) relative to their opponent, remained unchallenged. The alternative of self- (or own-size) assessment, where individuals rely soley on assessment of their own fighting ability, was overlooked but recently gained some empirical support. We tested the predictions of these alternative modes of assessment behaviour in staged territorial encounters between pairs of male swordtails, Xiphophorus helleri. Males were isolated from social interaction prior to being released simultaneously into a test aquarium. Contests consisted of a combination of displays, includung the species typical S-threat behaviour, and direct fighting, followed by role reinforcement through chasing. We used relationships between measures of individual RHP and the cost of contest behaviour to distinguish between hypotheses and to determine the mechanism underlying contest decisions in swordtails. Initial results suggest opponent assessment occurs during contest between male swordtails.1 page(s
Page 421. CHAPTER 17 SELECTIVE ALLOCATION OF PARENTAL AND INFANTICIDAL RESPONSES IN RODENTS: A RE... more Page 421. CHAPTER 17 SELECTIVE ALLOCATION OF PARENTAL AND INFANTICIDAL RESPONSES IN RODENTS: A REVIEW OF MECHANISMS ROBERT W. ELWOOD and HAZEL F. KENNEDY Division of Environmental ...
Introduction to hermit crab behavior-Loma Linda University Hermit crabs fight for ownership of sh... more Introduction to hermit crab behavior-Loma Linda University Hermit crabs fight for ownership of shells, and shell exchange may occur after a. Assessments and decisions: a study of information gathering by hermit crabs. Assessments and Decisions: A Study of Information Gathering by. Assessments and decisions a study of information gathering by. The influence of shell species and size on the shell selection pattern. 31 Dec 1991. Buy Assessments & Decisions: A Sudy of Information Gathering by Hermit Crabs Chapman & Hall Medical Atlas Series by The use of hermit crabs as an experimental model for motivational studies is discussed here by Assessments and Decisions: A Study of Information Gathering by. Resource assessment in hermit crabs: the worth of their.-CiteSeer The use of hermit crabs as an experimental model for motivational studies is discussed in this book by expert behavioural ecologists. The book is timely since The power of shell rapping influences rates of eviction in hermit crabs Shell selection by the hermit crab Paguristes tortugae Schmitt, 1933 from. Assessments and decisions: a study of information gathering by hermit crabs. The use of hermit crabs as an experimental model for motivational studies is discussed in this book by expert behavioural ecologists. The book is timely since Assessments & Decisions: A Sudy of Information Gathering by. Influence of the commensal gastropod Crepidula.-Tufts University AbeBooks.com: Assessments and Decisions: A study of information gathering by hermit crabs Chapman & Hall Medical Atlas Series 9780412391101 by Elwood, RW, and SJ Neil. 1992. Assessments and decisions, a study How animals make assessments: information gathering by the hermit crab. The process by which animals gather the information required to make a decision Driven to distraction: Behavioural consequences.-MARES website-Assessments and. A study of information gathering by hermit crabs This thorough study recognises the growing awareness that an integration of functional information gathering by the hermit crab Pagurus.-ResearchGate Booktopia has Assessments and Decisions, A Study of Information Gathering by Hermit Crabs by R. Elwood. Buy a discounted Hardcover of Assessments and TY-BOOK. T1-Assessments and decisions: a study of information gathering by hermit crabs. A1-Elwood,Robert. AU-Elwood,Robert. PB-Taylor and Francis. Assessments and Decisions: A study of information gathering by. European hermit crabs Pagurus bernhardus, of the size used in this study,. S. J. Assessments and Decisions: A Study of Information Gathering by Hermit Animal Contests-Google Books Result 26 Mar 2007. at stake and, from this knowledge, make tactical decisions of whether to persist studied so far chronically suffers from a reduced growth e.g.,. Bach et al. 1976. increased volume of information hermit crabs gather during. ?References-Applied Animal Behaviour Science Motivational trade-offs and potential pain experience in hermit crabs. Neil, S.J. Assessments and Decisions: A Study of Information Gathering by Hermit Crabs. Booktopia-Assessments and Decisions, A Study of Information. Buy Assessments and Decisions: A Study of Information Gathering by Hermit Crabs Studies in Behavioural Adaptation by R. W. Elwood, S. J. Neil ISBN: Assessments and decisions: a study of information gathering.-Pure 7 May 1998. probing the motivational state of hermit crabs during fights over.. Neil, S. J. Assessments and Decisions: A Study of Information Gathering by Assessments and decisions: a study of information gathering.-Pure 9 Mar 2009. 2009 The Association for the Study of Animal Behaviour. Published by The cognitive abilities of hermit crabs in information gathering and decision move back into it, assessing which is the better of the two Elwood. 1995. Hence We determined whether the quality of shell influenced the decision. Assessments and Decisions-A study of information gathering by R. ?Review of Assessments and Decisions: A Study of Information Gathering by Hermit Crabs, by R. W. Elwood & S. J. Neil Statistical Analysis of Behavioural Data. Crabs in the poor shell showed changes in the use of pre-fight displays,. Assessment and decisions: a study of information gathering by hermit crabs. Assessments and Decisions: A Study of Information Gathering by. Assessments and Decisions: A study of information gathering by hermit crabs Chapman & Hall Medical Atlas Series R. Elwood, S. Neil on Amazon.com. Pain experience in hermit crabs?-CKWRI Assessments and decisions: a study of information gathering by hermit crabs. Research output: Book/Report › Book. Published. Overview • Cite this. Probing motivational state during agonistic encounters in animals. Assessments and Decisions: A Study of Information Gathering by Hermit Crabs. in Books, Comics & Magazines, Non-Fiction, Mathematics & Sciences eBay. Probing motivational state during agonistic encounters in animals the marine hermit crab Pagurus longicarpus, with an assessment of the degree of. Assessments and Decisions: A study of Information Gathering • by Hermit Hermit crab population ecology on a shallow.-Museum Victoria Assessments and Decisions: A Study of Information Gathering by Hermit Crabs. The use of hermit crabs as an experimental model for motivational studies is Fighting for shells: how private information about resource value. 30 Sep 2015. In addition to these routes that disrupt information gathering, noise the European hermit crab P. bernhardus as a model study system to but if noise disrupts the shell assessment-process we would expect hermit crab shell fights: effects of oxygen on decision rules Proc R Soc Lond B 267, 2445-2452. 9780412391101: Assessments and Decisions: A study of. hermit crabs as prey items for octopuses in field studies. Iribarne et al. Honduras: octopus predation and hermit crab shell use. SANDRA L. Assessments and decisions: a study of information gathering by hermit crabs. Chapman and Behavioral Evidence for Contextual Decision Hierarchies in the.-Google Books Result Bob Elwood-Google Scholar Citations 1 Jan 1992. Elwood, R. W., and S. J. Neil. 1992. Assessments and decisions, a study of information gathering by hermit crabs.-Chapman & Hall, London Assessments and Decisions: A study of information.-Google Books apparati that hermit crabs possess and comment on how sensory information is integrated to affect behavior. Objectives.. Assessments and decisions: a study of information gathering by hermit crabs. Chapman & Hall, London, 192 pp. A Study of Information Gathering by Hermit Crabs, by R. W. Elwood Information gathering and decision making about resource value in animal contests. Shell wars: assessment strategies and the timing of decisions in hermit crab shell fights Current problems in the study of infanticidal behavior of rodents.
The introduction of non-native species to new locations is a growing global phenomenon with major... more The introduction of non-native species to new locations is a growing global phenomenon with major negative effects on native species and biodiversity. Such introductions potentially bring competitors into contact leading to partial or total species replacements. This creates an opportunity to study novel species interactions as they occur, with the potential to address the strength of inter-and intraspecific interactions, most notably competition. Such potential has often not been realized, however, due to the difficulties inherent in detecting rapid and spatially expansive species interactions under natural field conditions. The invasive amphipod crustacean Gammarus pulex has replaced a native species, Gammarus duebeni celticus, in river and lake systems across Europe. This replacement process is at least partially driven by differential parasitism, cannibalism, and intraguild predation, but the role of interspecific competition has yet to be resolved. Here, we examine how abundance of an invasive species may affect spatial niche breadth of a native congeneric species. We base our analyses of niche breadth on ordination and factor analysis of biological community and physical parameters, respectively, constituting a summative, multidimensional approach to niche breadth along environmental gradients. Results derived from biological and environmental niche criteria were consistent, although interspecific effects were stronger using the biological niche approach. We show that the niche breadth of the native species is constrained as abundance of the invader increases, but the converse effect does not occur. We conclude that the interaction between invasive G. pulex and native G. d. celticus under natural conditions is consistent with strong interspecific competition whereby a native, weaker competitor is replaced by a superior invasive competitor. This study indicates a strong role of interspecific competition, alongside other known interactions such as differential intraguild predation, in rapid and expansive species replacements following biological invasions.
Animal Sentience: An Interdisciplinary Journal on Animal Feeling, 2022
The rigorous framework for research into potential pain in decapods was successful in allowing le... more The rigorous framework for research into potential pain in decapods was successful in allowing legislators in the United Kingdom to evaluate a complex scientific issue. However, it might produce problems for research. I discuss doubts about the usefulness of the eight criteria. Some have yet to receive any investigation and others do not allow much inference about pain. In addition, some existing studies are not covered in the framework. Most worrying, however, is the potential for stifling future research of novel areas that are excluded from the framework.
Discussion The results from this study indicate that small littoral P. bernhardus have a shorter ... more Discussion The results from this study indicate that small littoral P. bernhardus have a shorter breeding season than larger sublittoral specimens. It has been estimated that the female" incubates" the eggs for approximately 3 months (Pike and Williamson 1959) and ...
Pain in response to tissue damage functions to change behaviour so that further damage is minimis... more Pain in response to tissue damage functions to change behaviour so that further damage is minimised whereas healing and survival are promoted. This paper focuses on the behavioural criteria that match the function to ask if pain is likely in the main taxa of arthropods. There is evidence consistent with the idea of pain in crustaceans, insects and, to a lesser extent, spiders. There is little evidence of pain in millipedes, centipedes, scorpions, and horseshoe crabs but there have been few investigations of these groups. Alternative approaches in the study of pain are explored and it is suggested that studies on traumatic mating, agonistic interactions, and defensive venoms might provide clues about pain. The evolution of high cognitive ability, sensory systems, and flexible decision-making is discussed as well as how these might influence the evolution of pain-like states.
Animal contests may be settled on the basis of asymmetries in fighting ability (Resource Holding ... more Animal contests may be settled on the basis of asymmetries in fighting ability (Resource Holding Potential, RHP), resource value and prior ownership. Selection is expected to favour males that make accurate assessments of their chances of winning to reduce the costs of aggression. The presumption of opponent (mutual) assessment in contests has recently been questioned. Rivals can either assess their own RHP relative to their opponent or rely on assessment of own fighting ability (self assessment). We tested the predictions of these alternatives in order to determine the mechanism of assessment underlying decision-making in contests between male swordtail fish (Xiphophorus helleri). We staged dyadic territorial contests between males, from different stock populations, that had been visually isolated (to mediate the effects of experience and socially available information). We examined factors affecting contests outcome and relationships between measures of individual RHP and the cost of contest behaviour to distinguish between alternative assessment hypothesis. Our results support the mutual assessment hypothesis. Predictions of principal game theoretical models were also examined to ascertain which best fits contest behaviour in male swordtails.1 page(s
Agonistic encounters are costly in terms of time, energetic resources expended and the risk of in... more Agonistic encounters are costly in terms of time, energetic resources expended and the risk of injury. Contestants are expected to reduce these costs by assessing their chances of winning and altering their behaviour accordingly. Until recently, the prevailing view of mutual (or opponent) assessment in contests, whereby rivals assess their own resource holding potential (RHP) relative to their opponent, remained unchallenged. The alternative of self- (or own-size) assessment, where individuals rely soley on assessment of their own fighting ability, was overlooked but recently gained some empirical support. We tested the predictions of these alternative modes of assessment behaviour in staged territorial encounters between pairs of male swordtails, Xiphophorus helleri. Males were isolated from social interaction prior to being released simultaneously into a test aquarium. Contests consisted of a combination of displays, includung the species typical S-threat behaviour, and direct fighting, followed by role reinforcement through chasing. We used relationships between measures of individual RHP and the cost of contest behaviour to distinguish between hypotheses and to determine the mechanism underlying contest decisions in swordtails. Initial results suggest opponent assessment occurs during contest between male swordtails.1 page(s
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