DOCSLIB.ORG

Newsletter of the Animal Navigation Group

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Newsletter of the Animal Navigation Group Newsletter of the Animal Navigation Group Issue No. 28 Autumn 2013 Contents Navigational Efficiency of Nocturnal ‘Myrmecia’ Ants Suffers at Low Light Levels 5 Spatial memory and stereotypy of flight paths by big brown bats in cluttered surroundings 5 Bumblebee calligraphy: the design and control of flight motifs in the learning and return flights of Bombus terrestris 6 Coordinating compass-based and nest-based flight directions during bumblebee learning and return flights 6 Spontaneous magnetic orientation in larval Drosophila shares properties with learned magnetic compass responses in adult flies and mice 7 Magnetic Compass Orientation in the European Eel 7 Animal Behaviour: Monarchs Catch a Cold 8 Endogenous control of migratory behavior in Alaskan Northern Wheatears Oenanthe oenanthe 8 An unknown migration route of the "globally threatened" Aquatic Warbler revealed by geolocators 8 Migration strategies of the Yelkouan Shearwater Puffinus yelkouan 8 Orientation of shorebirds in relation to wind: both drift and compensation in the same region 9 Individual migratory patterns of two threatened seabirds revealed using stable isotope and geolocation analyses 9 Homeward bound: factors affecting homing ability in a polymorphic lizard 10 Migration confers survival benefits against avian predators for partially migratory freshwater fish 10 Pairs of pigeons act as behavioural units during route learning and co-navigational leadership conflicts 11 Response of a free-flying songbird to an experimental shift of the light polarization pattern around sunset 11 Back home at night or out until morning? Nycthemeral variations in homing of anosmic Cory's shearwaters in a diurnal colony 12 The invisible cues that guide king penguin chicks home: use of magnetic and acoustic cues during orientation and short-range navigation 12 Reception and learning of electric fields in bees 13 The behavioural ecology of animal movement: reflections upon potential synergies 13 In search of magnetosensitivity and ferromagnetic particles in Rhodnius prolixus: Behavioral studies and vibrating sample magnetometry 14 Orientation of migrating leatherback turtles in relation to ocean currents 14 Long-Distance Animal Migrations in the Oceanic Environment: Orientation and Navigation 1 Correlates 15 Detection and Learning of Floral Electric Fields by Bumblebees 15 Interactions between the visual and the magnetoreception system: Different effects of bichromatic light regimes on the directional behavior of migratory birds 15 An experimental displacement and over 50 years of tag-recoveries show that monarch butterflies are not true navigators 16 Beware the Boojum: caveats and strengths of avian radar 16 Common orientation and layering of migrating insects in southeastern Australia observed with a Doppler weather radar 17 Passive Acoustic Tracking of Singing Humpback Whales (Megaptera novaeangliae) on a Northwest Atlantic Feeding Ground 17 Flexible weighing of olfactory and vector information in the desert ant Cataglyphis fortis 18 Visual Scene Perception in Navigating Wood Ants 18 Mechanistic models of animal migration behaviour – their diversity, structure and use 18 Sensory Navigation Device for Blind People 19 Repeat Tracking of Individual Songbirds Reveals Consistent Migration Timing but Flexibility in Route 19 Migration phenology and seasonal fidelity of an Arctic marine predator in relation to sea ice dynamics 20 Overshadowing of geometry learning by discrete landmarks in the water maze: Effects of relative salience and relative validity of competing cues 20 Predictive ethoinformatics reveals the complex migratory behaviour of a pelagic seabird, the Manx Shearwater 21 Migratory connectivity magnifies the consequences of habitat loss from sea-level rise for shorebird populations 21 Three-Phase Fuel Deposition in a Long-Distance Migrant, the Red Knot Calidris canutus piersmai, before the Flight to High Arctic Breeding Ground 22 Bird Migration Advances More Strongly in Urban Environments 22 Visual Navigation during Colony Emigration by the Ant Temnothorax rugatulus 22 Representation of Three-Dimensional Space in the Hippocampus of Flying Bats 23 A 3D Analysis of Flight Behavior of Malaria Mosquitoes in Response to Human Odor and Heat 23 A Distinct Layer of the Medulla Integrates Sky Compass Signals in the Brain of an Insect 24 The depth of the honeybee's backup sun-compass systems 24 Differences in Speed and Duration of Bird Migration between Spring and Autumn 25 Activity-dependent gene expression in honey bee mushroom bodies in response to orientation flight 25 Migrating Mule Deer: Effects of Anthropogenically Altered Landscapes 25 Error Properties of Argos Satellite Telemetry Locations Using Least Squares and Kalman Filtering 26 Ocean-finding in marine turtles: the importance of low-horizon elevation as an orientation cue 26 From random walks to informed movement 27 Homing Pigeons Respond to Time-Compensated Solar Cues Even in Sight of the Loft 28 An Iron-Rich Organelle in the Cuticular Plate of Avian Hair Cells 28 A magnetic pulse does not affect homing pigeon navigation: a GPS tracking experiment 28 Forty years of olfactory navigation in birds 29 Hippocampal Time Cells: Time versus Path Integration 29 Avian magnetic compass can be tuned to anomalously low magnetic intensities 30 A Trans-Hemispheric Migratory Songbird Does Not Advance Spring Schedules or Increase 2 Migration Rate in Response to Record-Setting Temperatures at Breeding Sites 30 Passive electroreception in aquatic mammals 31 Are harbour seals (Phoca vitulina) able to perceive and use polarised light? 31 Edible Crabs "Go West": Migrations and Incubation Cycle of Cancer pagurus Revealed by Electronic Tags 31 Echolocation in Blainville's beaked whales (Mesoplodon densirostris) 32 Conditional Use of Social and Private Information Guides House-Hunting Ants 32 Increasing the Usability of Pedestrian Navigation Interfaces by means of Landmark Visibility Analysis 33 Biomimetic and bio-inspired robotics in electric fish research 33 Differential Regulation of Adipokines May Influence Migratory Behavior in the White- Throated Sparrow (Zonotrichia albicollis) 33 Rejoinder: challenge and opportunity in the study of ungulate migration amid environmental change 34 Environmental change and the evolution of migration 34 Animal migration amid shifting patterns of phenology and predation: lessons from a Yellowstone elk herd 35 Carry-over effects from breeding modulate the annual cycle of a long-distance migrant: an experimental demonstration 35 Sun Compass Orientation Helps Coral Reef Fish Larvae Return to Their Natal Reef 36 Advances in tracking small migratory birds: a technical review of light-level geolocation 36 The significance of midsummer movements of Autographa gamma: Implications for a mechanistic understanding of orientation behavior in a migrant moth 37 Apparent dissociation of photoperiodic time measurement between vernal migration and breeding under dim green light conditions in Gambel's white-crowned sparrow Zonotrichia leucophrys gambelii 37 Revealing the control of migratory fueling: An integrated approach combining laboratory and field studies in northern wheatears Oenanthe oenanthe 38 Lipid reserves and immune defense in healthy and diseased migrating monarchs Danaus plexippus 38 Premigratory fat metabolism in hummingbirds: A rumsfeldian approach 39 Development of the navigational system in homing pigeons: increase in complexity of the navigational map 39 Mapping the navigational knowledge of individually foraging ants, Myrmecia croslandi 39 Use of a light-dependent magnetic compass for y-axis orientation in European common frog (Rana temporaria) tadpoles 40 Automated long-term tracking and social behavioural phenotyping of animal colonies within a semi-natural environment 40 Projected climate-driven faunal movement routes 41 Movements and dispersal of farmed Atlantic salmon following a simulated-escape event 41 Site fidelity and homing behaviour in intertidal fishes 41 Satellite telemetry reveals behavioural plasticity in a green turtle population nesting in Sri Lanka 42 Context-dependent diel behavior of upstream-migrating anadromous fishes 42 Migration and dispersal patterns of bats and their influence on genetic structure. Bats are important ecosystems service providers, make a significant contribution to biodiversity and can be important pests and disease vectors. In spite of this, information on their migration and dispersal patterns is limited. 42 Fall movements of Red-headed Woodpeckers in South Carolina. 43 Effect of neck collars on the body condition of migrating Greater Snow Geese 43 3 Migratory Reed Warblers Need Intact Trigeminal Nerves to Correct for a 1,000 km Eastward Displacement 44 Perceiving space and optical cues via a visuo-tactile sensory substitution system: a methodological approach for training of blind subjects for navigation 44 Complementary Roles of the Hippocampus and the Dorsomedial Striatum during Spatial and Sequence-Based Navigation Behavior 45 Annual rhythms that underlie phenology: biological time-keeping meets environmental change 45 Patterns and influences on Dolly Varden migratory timing in the Chignik Lakes, Alaska, and comparison of populations throughout the northeastern Pacific and Arctic oceans 46 Blue whales respond to simulated mid-frequency military sonar 46 Rates of straying by hatchery-produced Pacific salmon (Oncorhynchus spp.) and steelhead (Oncorhynchus mykiss) differ among species, life history types, and populations 47 A Depth-Based Head-Mounted
Load more

Recommended publications
  • Φ-Features in Animal Cognition
    φ-Features in Animal Cognition Chris Golston This paper argues that the core φ-features behind grammatical person, number, and gender are widely used in animal cognition and are in no way limited to humans or to communication. Based on this, it is hypothesized (i) that the semantics behind φ-features were fixed long before primates evolved, (ii) that most go back as far as far as vertebrates, and (iii) that some are shared with insects and plants. Keywords: animal cognition; gender; number; person 1. Introduction Bickerton claims that language is ill understood as a communication system: [F]or most of us, language seems primarily, or even exclusively, to be a means of communication. But it is not even primarily a means of communication. Rather, it is a system of representation, a means for sorting and manipulating the plethora of information that deluges us throughout our waking life. (Bickerton 1990: 5) As Berwick & Chomsky (2016: 102) put it recently “language is fundamentally a system of thought”. Since much of our system of representation seems to be shared with other animals, it has been argued that we should “search for the ancestry of language not in prior systems of animal communication, but in prior representational systems” (Bickerton 1990: 23). In support of this, I provide evidence that all the major φ-features are shared with primates, most with vertebrates, and some with plants; and that there are no φ-features whose semantics are unique to humans. Specifically human categories, including all things that vary across human cultures, seem to I’d like to thank Steve Adisasmito-Smith, Charles Ettner, Sean Fulop, Steven Moran, Nadine Müller, three anonymous reviewers for EvoLang, two anonymous reviewers for Biolinguistics and Kleanthes Grohmann for help in identifying weakness in earlier drafts, as well as audiences at California State University Fresno, Marburg Universität, and Universitetet i Tromsø for helpful discussion.
    [Show full text]
  • Magnetic and Celestial Orientation of Migrating European Glass Eels
    Magnetic and Celestial Orientation of Migrating European Glass Eels (Anguilla anguilla) Cresci, Alessandro https://scholarship.miami.edu/view/delivery/01UOML_INST/12356199980002976 Cresci, A. (2020). Magnetic and Celestial Orientation of Migrating European Glass Eels (Anguilla anguilla) (University of Miami). Retrieved from https://scholarship.miami.edu/discovery/fulldisplay/alma991031453189802976/01U OML_INST:ResearchRepository Open 2020/05/11 19:16:33 UNIVERSITY OF MIAMI MAGNETIC AND CELESTIAL ORIENTATION OF MIGRATING EUROPEAN GLASS EELS (ANGUILLA ANGUILLA) By Alessandro Cresci A DISSERTATION Submitted to the Faculty of the University of Miami in partial fulfillment of the requirements for the degree of Doctor of Philosophy Coral Gables, Florida May 2020 ©2020 Alessandro Cresci All Rights Reserved UNIVERSITY OF MIAMI A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy MAGNETIC AND CELESTIAL ORIENTATION OF MIGRATING EUROPEAN GLASS EELS (ANGUILLA ANGUILLA) Alessandro Cresci Approved: ________________ _________________ Josefina Olascoaga, Ph.D. Joseph E. Serafy, Ph.D. Professor of Physical Oceanography Research Professor Ocean Sciences Marine Biology and Ecology ________________ _________________ William E. Johns, Ph.D. Evan K. D’Alessandro, Ph.D. Professor of Physical Oceanography Lecturer and Director, M.P.S Ocean Sciences Marine Biology and Ecology ________________ ________________ Howard I. Browman, Ph.D. Caroline M.F. Durif, Ph.D. Principal Research Scientist Principal Research Scientist Institute of Marine Research Institute of Marine Research ________________ Guillermo Prado, Ph.D. Dean of the Graduate School CRESCI, ALESSANDRO (Ph.D., Ocean Sciences) Magnetic and Celestial Orientation of Migrating (May 2020) European Glass Eels (Anguilla anguilla) Abstract of a dissertation at the University of Miami. Dissertation supervised by Professor Josefina Olascoaga.
    [Show full text]
  • Collective Behavior As a Driver of Critical Transitions in Migratory Populations Andrew Berdahl1,2*†, Anieke Van Leeuwen2†, Simon A
    Berdahl et al. Movement Ecology (2016) 4:18 DOI 10.1186/s40462-016-0083-8 RESEARCH Open Access Collective behavior as a driver of critical transitions in migratory populations Andrew Berdahl1,2*†, Anieke van Leeuwen2†, Simon A. Levin2 and Colin J. Torney2,3 Abstract Background: Mass migrations are among the most striking examples of animal movement in the natural world. Such migrations are major drivers of ecosystem processes and strongly influence the survival and fecundity of individuals. For migratory animals, a formidable challenge is to find their way over long distances and through complex, dynamic environments. However, recent theoretical and empirical work suggests that by traveling in groups, individuals are able to overcome these challenges and increase their ability to navigate. Here we use models to explore the implications of collective navigation on migratory, and population, dynamics, for both breeding migrations (to-and-fro migrations between distinct, fixed, end-points) and feeding migrations (loop migrations that track favorable conditions). Results: We show that while collective navigation does improve a population’s ability to migrate accurately, it can lead to Allee effects, causing the sudden collapse of populations if numbers fall below a critical threshold. In some scenarios, hysteresis prevents the migration from recovering even after the cause of the collapse has been removed. In collectively navigating populations that are locally adapted to specific breeding sites, a slight increase in mortality can cause a collapse of genetic population structure, rather than population size, making it more difficult to detect and prevent. Conclusions: Despite the large interest in collective behavior and its ubiquity in many migratory species, there is a notable lack of studies considering the implications of social navigation on the ecological dynamics of migratory species.
    [Show full text]
  • Old Tricks, New Dogs: Ethology and Interactive Creatures
    Old Tricks, New Dogs: Ethology and Interactive Creatures Bruce Mitchell Blumberg Bachelor of Arts, Amherst College, 1977 Master of Science, Sloan School of Management, MIT, 1981 SUBMITTED TO THE PROGRAM IN MEDIA ARTS AND SCIENCES, SCHOOL OF ARCHITECTURE AND PLANNING IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY AT THE MASSACHUSETTS INSTITUTE OF TECHNOLOGY. February 1997 @ Massachusetts Institute of Technology, 1996. All Rights Reserved Author:...................................................... ............................ .......................................... Program in Media Arts and Sciences' September 27,1996 Certified By:................................. Pattie Maes Associate Professor Sony Corporation Career Development Professor of Media Arts and Science Program in Media Arts and Sciences Thesis Supervisor . A ccepted By:................................. ......... .... ............................ Stephen A. Benton Chair, Departmental Committee on Graduate Students Program in Media Arts and Sciences MAR 1 9 1997 2 Old Tricks, New Dogs: Ethology and Interactive Creatures Bruce Mitchell Blumberg SUBMITTED TO THE PROGRAM IN MEDIA ARTS AND SCIENCES, SCHOOL OF ARCHITECTURE AND PLANNING ON SEPTEMBER 27, 1996 IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY AT THE MASSACHUSETTS INSTITUTE OF TECHNOLOGY Abstract This thesis seeks to address the problem of building things with behavior and character. By things we mean autonomous animated creatures or intelligent physical devices. By behavior we mean that they display the rich level of behavior found in animals. By char- acter we mean that the viewer should "know" what they are "feeling" and what they are likely to do next. We identify five key problems associated with building these kinds of creatures: Rele- vance (i.e. "do the right things"), Persistence (i.e.
    [Show full text]
  • Fusion of Wildlife Tracking and Satellite Geomagnetic Data for the Study of Animal Migration Fernando Benitez-Paez1,2 , Vanessa Da Silva Brum-Bastos1 , Ciarán D
    Benitez-Paez et al. Movement Ecology (2021) 9:31 https://doi.org/10.1186/s40462-021-00268-4 METHODOLOGY ARTICLE Open Access Fusion of wildlife tracking and satellite geomagnetic data for the study of animal migration Fernando Benitez-Paez1,2 , Vanessa da Silva Brum-Bastos1 , Ciarán D. Beggan3 , Jed A. Long1,4 and Urška Demšar1* Abstract Background: Migratory animals use information from the Earth’s magnetic field on their journeys. Geomagnetic navigation has been observed across many taxa, but how animals use geomagnetic information to find their way is still relatively unknown. Most migration studies use a static representation of geomagnetic field and do not consider its temporal variation. However, short-term temporal perturbations may affect how animals respond - to understand this phenomenon, we need to obtain fine resolution accurate geomagnetic measurements at the location and time of the animal. Satellite geomagnetic measurements provide a potential to create such accurate measurements, yet have not been used yet for exploration of animal migration. Methods: We develop a new tool for data fusion of satellite geomagnetic data (from the European Space Agency’s Swarm constellation) with animal tracking data using a spatio-temporal interpolation approach. We assess accuracy of the fusion through a comparison with calibrated terrestrial measurements from the International Real-time Magnetic Observatory Network (INTERMAGNET). We fit a generalized linear model (GLM) to assess how the absolute error of annotated geomagnetic intensity varies with interpolation parameters and with the local geomagnetic disturbance. Results: We find that the average absolute error of intensity is − 21.6 nT (95% CI [− 22.26555, − 20.96664]), which is at the lower range of the intensity that animals can sense.
    [Show full text]
  • Particle Swarm Optimization Based Source Seeking Rui Zou, Vijay Kalivarapu, Eliot Winer, James Oliver, Sourabh Bhattacharya
    1 Particle Swarm Optimization Based Source Seeking Rui Zou, Vijay Kalivarapu, Eliot Winer, James Oliver, Sourabh Bhattacharya Abstract—Signal source seeking using autonomous vehicles is a chemical/biological agent. Motivated from source-seeking a complex problem. The complexity increases manifold when behavior exhibited by natural species from a microscopic level signal intensities captured by physical sensors onboard are noisy [1] to a macroscopic level [2], researchers have developed and unreliable. Added to the fact that signal strength decays with distance, noisy environments make it extremely difficult to robots [3] and sensor networks [4] that can imitate these be- describe and model a decay function. This paper addresses our haviors in order to perform complex tasks such as environment work with seeking maximum signal strength in a continuous monitoring, search and rescue operations, explosive detection, electromagnetic signal source with mobile robots, using Particle drug detection, sensing leakage of hazardous chemicals, pol- Swarm Optimization (PSO). A one to one correspondence with lution sensing and environmental studies. swarm members in a PSO and physical mobile robots is estab- lished and the positions of the robots are iteratively updated In this work, we address the problem in which a team as the PSO algorithm proceeds forward. Since physical robots of mobile agents, called the seekers, attempt to find the are responsive to swarm position updates, modifications were location of a source that emits an electromagnetic signal required to implement the interaction between real robots and of unknown strength. The seekers can continuously sense the PSO algorithm. The development of modifications necessary the signal strength transmitted by the source at their current to implement PSO on mobile robots, and strategies to adapt to real life environments such as obstacles and collision objects are positions which generally decays with distance from the presented in this paper.
    [Show full text]
  • Review the Sensory Ecology of Ocean Navigation
    1719 The Journal of Experimental Biology 211, 1719-1728 Published by The Company of Biologists 2008 doi:10.1242/jeb.015792 Review The sensory ecology of ocean navigation Kenneth J. Lohmann*, Catherine M. F. Lohmann and Courtney S. Endres Department of Biology, University of North Carolina, Chapel Hill, NC 27599, USA *Author for correspondence (e-mail: [email protected]) Accepted 31 March 2008 Summary How animals guide themselves across vast expanses of open ocean, sometimes to specific geographic areas, has remained an enduring mystery of behavioral biology. In this review we briefly contrast underwater oceanic navigation with terrestrial navigation and summarize the advantages and constraints of different approaches used to analyze animal navigation in the sea. In addition, we highlight studies and techniques that have begun to unravel the sensory cues that underlie navigation in sea turtles, salmon and other ocean migrants. Environmental signals of importance include geomagnetic, chemical and hydrodynamic cues, perhaps supplemented in some cases by celestial cues or other sources of information that remain to be discovered. An interesting similarity between sea turtles and salmon is that both have been hypothesized to complete long-distance reproductive migrations using navigational systems composed of two different suites of mechanisms that function sequentially over different spatial scales. The basic organization of navigation in these two groups of animals may be functionally similar, and perhaps also representative of other long-distance ocean navigators. Key words: navigation, orientation, migration, magnetic, hydrodynamic, chemical, olfactory, sea turtle, fish, whale, salmon. Introduction animals navigating through the ocean have access to a suite of Considerable progress has been made in characterizing the navigational cues which differs from that of their terrestrial mechanisms of orientation and navigation used by diverse animals.
    [Show full text]
  • Navigational Strategies and Models T
    Psicológica (2002), 23, 3-32. Navigational strategies and models T. Rodrigo* University of Barcelona Many scientists are interested in the different mechanisms and strategies that animals use to navigate. This paper reviews a series of studies and models about the navigational strategies that animals can use to move from one place to another. Studies of long-distance navigation have mainly been focused on how animals are able to maintain a certain orientation across a distance of hundreds of kilometers. These studies have shown the great variety of sources of information that animals can use to orientate themselves, as well as their redundancy. But, for successful navigation to occur, animals not only have to know how to orientate themselves, they also have to know which direction they should be orientated and for how long. Direction and duration have mainly been studied in short-distance navigation. These studies have shown that animals can use a variety of strategies to locate a given goal. Whether an animal uses a specific strategy will depend on its sensory capabilities and also on the conditions imposed by the environment. Navigation can be defined as the process which enables a course or path from one place to another to be identified and maintained (Gallistel, 1990). The importance of this process for animals that navigate over long distances is obvious. There are many animal that migrate, both to find favourable climatic and nutritional conditions for the adults and to provide the young with the necessary conditions for growth. Navigational errors could take them far from their goal and to a place without the necessary conditions for their survival.
    [Show full text]
  • The Role of Landscapes and Landmarks in Bee Navigation: a Review
    insects Review The Role of Landscapes and Landmarks in Bee Navigation: A Review Bahram Kheradmand * and James C. Nieh Section of Ecology, Behavior, and Evolution, Division of Biological Sciences, UC San Diego, La Jolla, CA 92093, USA; [email protected] * Correspondence: [email protected]; Tel.: +1-858-822-5010 Received: 31 August 2019; Accepted: 9 October 2019; Published: 12 October 2019 Abstract: The ability of animals to explore landmarks in their environment is essential to their fitness. Landmarks are widely recognized to play a key role in navigation by providing information in multiple sensory modalities. However, what is a landmark? We propose that animals use a hierarchy of information based upon its utility and salience when an animal is in a given motivational state. Focusing on honeybees, we suggest that foragers choose landmarks based upon their relative uniqueness, conspicuousness, stability, and context. We also propose that it is useful to distinguish between landmarks that provide sensory input that changes (“near”) or does not change (“far”) as the receiver uses these landmarks to navigate. However, we recognize that this distinction occurs on a continuum and is not a clear-cut dichotomy. We review the rich literature on landmarks, focusing on recent studies that have illuminated our understanding of the kinds of information that bees use, how they use it, potential mechanisms, and future research directions. Keywords: landmark detection; salience; visual information; multimodal navigation; Apis mellifera 1. Introduction 1.1. What Are Landmarks? A major and fascinating question in the study of animal cognition is how animals identify, remember, and use landmarks to navigate.
    [Show full text]
  • Context-Dependent Diel Behavior of Upstream-Migrating Anadromous Fishes
    Environ Biol Fish (2013) 96:691–700 DOI 10.1007/s10641-012-0059-5 Context-dependent diel behavior of upstream-migrating anadromous fishes Matthew L. Keefer & Christopher C. Caudill & Christopher A. Peery & Mary L. Moser Received: 31 October 2011 /Accepted: 18 June 2012 /Published online: 4 July 2012 # Springer Science+Business Media B.V. 2012 Abstract Variability is a hallmark of animal behavior during most of the diel cycle in low-gradient, and the degree of variability may fluctuate in response to less hydraulically complex reservoir and riverine environmental or biological gradients. For example, diel habitats. Movement shifted to predominantly diurnal activity patterns during reproductive migrations often (salmonids and American shad) or nocturnal (Pacific differ from those in non-breeding habitats, reflecting lamprey) at hydroelectric dam fishways where hy- trade-offs among efficient route selection, reproductive draulic complexity and predator density were high. phenology, and risk avoidance. In this study, we tested Results suggest that context-dependent behaviors are the hypothesis that diel movements of anadromous common during fish migrations, and that diel activ- fishes differ among freshwater migration habitats. We ity patterns vary with the degree of effort or preda- analyzed diel movement data from ~13 000 radio-, PIT-, tion risk required for movement. and acoustic-tagged adult fishes from five Columbia River species: Chinook salmon, Oncorhynchus tshawyt- Keywords Behavioral plasticity. Migration . scha; sockeye salmon, O. nerka; steelhead, O. mykiss; Orientation . Predation risk . Sensory ecology Pacific lamprey, Entosphenus tridentatus;andAmerican shad, Alosa sapidissima. All five species were active Introduction M. L. Keefer (*) : C. C. Caudill Department of Fish and Wildlife Sciences, Behavioral flexibility allows animals to rapidly and College of Natural Resources, University of Idaho, adaptively respond to changing conditions and to en- Moscow, ID 83844-1136, USA vironmental stimuli that signal resources or risk.
    [Show full text]
  • Restrictions on the Dynamic Growth of Navigation Accuracy in Groups of Animals
    Restrictions on the dynamic growth of navigation accuracy in groups of animals Vladimir N. Binhi Prokhorov General Physics Institute of the Russian Academy of Sciences; 38 Vavilov St., Moscow, 119991; [email protected] Abstract Many migratory animals regularly travel thousands of kilometers, ex- actly finding their destinations. It is assumed that migrants have both a compass sense to hold their course, and a map sense | a kind of \biolog- ical" GPS | to correct accumulated errors and determine right direction during navigation. Unlike the compass sense, the map sense is still not reliably explained. Therefore, an alternative way is discussed in literature to eliminate the errors | the aggregation of animals in groups and their coordinated movement. Orientation accuracy of a group may be signifi- cantly higher because the errors caused by the action of a variety of casual factors are averaged. This idea, called the \many wrongs principle," has been confirmed both in behavioral experiments and in the results of com- puter simulations. However, until now there was no analytical model that considered this effect and its limitations. Such a model is presented in this article. The model is given in terms of the course deviation angle and its variance. It includes a few parameters: individual sensitivity of the animal compass, the power of the herd instinct, and the level of random noise. These parameters determine, among other factors, the size of the group that is optimal for precise navigation. It is shown that there is a range of the noise level, at which the aggregation of individuals into groups that do not exceed a certain size would be favorable.
    [Show full text]
  • New Insights Into Pelagic Migrations: Implications for Ecology and Conservation
    ES43CH04-Costa ARI 26 September 2012 10:32 New Insights into Pelagic Migrations: Implications for Ecology and Conservation Daniel P. Costa, Greg A. Breed, and Patrick W. Robinson Department of Ecology and Evolutionary Biology, University of California, Santa Cruz, California 95060; email: [email protected] Annu. Rev. Ecol. Evol. Syst. 2012. 43:73–96 Keywords First published online as a Review in Advance on animal navigation, animal tracking, Argos, global positioning system August 28, 2012 (GPS), marine protected area, migration, satellite telemetry, transect survey The Annual Review of Ecology, Evolution, and Systematics is online at ecolsys.annualreviews.org Abstract This article’s doi: Highly pelagic large marine vertebrates have evolved the capability of mov- 10.1146/annurev-ecolsys-102710-145045 ing across large expanses of the marine environment; some species routinely Copyright c 2012 by Annual Reviews. move across entire ocean basins. Our understanding of these movements All rights reserved has been enhanced by new technologies that now allow us to follow their 1543-592X/12/1201-0073$20.00 by University of California - Santa Cruz on 11/13/12. For personal use only. movements over great distances and long time periods in great detail. This technology provides not only detailed information on the movements of a Annu. Rev. Ecol. Evol. Syst. 2012.43:73-96. Downloaded from www.annualreviews.org wide variety of marine species, but also detailed characteristics of the habi- tats they use and clues to their navigation abilities. Advances in electronic tracking technologies have been coupled with rapid development of statis- tical and analytical techniques. With these developments, conservation of highly migratory species has been aided by providing new information on where uncommon or endangered species go, what behaviors they perform and why, which habitats are critical, and where they range, as well as, in many cases, better estimates of their population size and the interconnect- edness of subpopulations.
    [Show full text]