Lek Behaviour in Birds: Do Displaying Males Reduce Nest Predation?
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Highlights of the Museum of Zoology Highlights on the Blue Route
Highlights of the Museum of Zoology Highlights on the Blue Route Ray-finned Fishes 1 The ray-finned fishes are the most diverse group of backboned animals alive today. From the air-breathing Polypterus with its bony scales to the inflated porcupine fish covered in spines; fish that hear by picking up sounds with the swim bladder and transferring them to the ear along a series of bones to the electrosense of mormyrids; the long fins of flying fish helping them to glide above the ocean surface to the amazing camouflage of the leafy seadragon… the range of adaptations seen in these animals is extraordinary. The origin of limbs 2 The work of Prof Jenny Clack (1947-2020) and her team here at the Museum has revolutionised our understanding of the origin of limbs in vertebrates. Her work on the Devonian tetrapods Acanthostega and Ichthyostega showed that they had eight fingers and seven toes respectively on their paddle-like limbs. These animals also had functional gills and other features that suggest that they were aquatic. More recent work on early Carboniferous sites is shedding light on early vertebrate life on land. LeatherbackTurtle, Dermochelys coriacea 3 Leatherbacks are the largest living turtles. They have a wide geographical range, but their numbers are falling. Eggs are laid on tropical beaches, and hatchlings must fend for themselves against many perils. Only around one in a thousand leatherback hatchlings reach adulthood. With such a low survival rate, the harvesting of turtle eggs has had a devastating impact on leatherback populations. Nile Crocodile, Crocodylus niloticus 4 This skeleton was collected by Dr Hugh Cott (1900- 1987). -
Importance of Dewlap Display in Male Mating Success in Free- Ranging Brown Anoles (Anolis Sagrei) Author(S): Richard R
Importance of Dewlap Display in Male Mating Success in Free- Ranging Brown Anoles (Anolis sagrei) Author(s): Richard R. Tokarz, Ann V. Paterson, Stephen McMann Source: Journal of Herpetology, 39(1):174-177. 2005. Published By: The Society for the Study of Amphibians and Reptiles DOI: http://dx.doi.org/10.1670/0022-1511(2005)039[0174:IODDIM]2.0.CO;2 URL: http://www.bioone.org/doi/ full/10.1670/0022-1511%282005%29039%5B0174%3AIODDIM%5D2.0.CO %3B2 BioOne (www.bioone.org) is a nonprofit, online aggregation of core research in the biological, ecological, and environmental sciences. BioOne provides a sustainable online platform for over 170 journals and books published by nonprofit societies, associations, museums, institutions, and presses. Your use of this PDF, the BioOne Web site, and all posted and associated content indicates your acceptance of BioOne’s Terms of Use, available at www.bioone.org/page/ terms_of_use. Usage of BioOne content is strictly limited to personal, educational, and non-commercial use. Commercial inquiries or rights and permissions requests should be directed to the individual publisher as copyright holder. BioOne sees sustainable scholarly publishing as an inherently collaborative enterprise connecting authors, nonprofit publishers, academic institutions, research libraries, and research funders in the common goal of maximizing access to critical research. SHORTER COMMUNICATIONS Journal of Herpetology, Vol. 39, No. 1, pp. 174–177, 2005 Copyright 2005 Society for the Study of Amphibians and Reptiles Importance of Dewlap Display in Male Mating Success in Free-Ranging Brown Anoles (Anolis sagrei) 1,2 3,4 3,5 RICHARD R. -
The Secret Sex Lives of Sage-Grouse: Multiple Paternity and Intraspecific Nest Parasitism Revealed Through Genetic Analysis
Behavioral Ecology doi:10.1093/beheco/ars132 Advance Access publication 21 September 2012 Original Article The secret sex lives of sage-grouse: multiple paternity and intraspecific nest parasitism revealed through genetic analysis Krista L. Birda, Cameron L. Aldridgea,b, Jennifer E. Carpentera, Cynthia A. Paszkowskia, Mark S. Boycea and David W. Coltmana aDepartment of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada T6G 2E9 Downloaded from bDepartment of Ecosystem Sciences and NREL, Colorado State University, in cooperation with US Geological Survey, 2150 Centre Avenue, Building C, Fort Collins, CO 80526, USA In lek-based mating systems only a few males are expected to obtain the majority of matings in a single breeding season and http://beheco.oxfordjournals.org/ multiple mating is believed to be rare. We used 13 microsatellites to genotype greater sage-grouse (Centrocercus urophasianus) samples from 604 adults and 1206 offspring from 191 clutches (1999–2006) from Alberta, Canada, to determine paternity and polygamy (males and females mating with multiple individuals). We found that most clutches had a single father and mother, but there was evidence of multiple paternity and intraspecific nest parasitism. Annually, most males fathered only one brood, very few males fathered multiple broods, and the proportion of all sampled males in the population fathering offspring aver- aged 45.9%, suggesting that more males breed in Alberta than previously reported for the species. Twenty-six eggs (2.2%) could be traced to intraspecific nest parasitism and 15 of 191 clutches (7.9%) had multiple fathers. These new insights have important implications on what we know about sexual selection and the mating structure of lekking species. -
Mating Systems and Parental Investment Mating Systems
Mating systems and parental investment Mating systems Pattern of matings in a population green anole Antithesis = promiscuity Polygyny Polygyny Scramble: no attempts to defend females, resources horseshoe crabs Northern barred frog Female defense: must be clustered elk Montezuma’s oropendola Dulichiella spp. Polygyny Resource distribution Resource defense: males defend food, nest sites Distribution of females affects Red-winged blackbird Lamprologus cichlid males’ ability to guard them Males cannot monopolize wide-ranging females dunnock 1 Polygyny threshold Polygyny threshold Male with no other females (monogamy) Male with other female(s) polygyny threshold ??? Quality of male’s territory Polygyny threshold Male dominance polygyny When females and sage grouse Polygyny threshold = point at which it’s resources too dispersed, better to be polygynous on a good territory males compete Leks = communal display arenas hammerhead bat Uganda kob Leks Leks High variance in male mating success – 10-20% males achieve >50% copulations – one male got 75% copulations Classical lek: males display in sight of each other Exploded lek: males rely wire-tailed manakin on vocal communication, e.g. kakapo 2 Leks Leks • Hotshots • Hotshots – Females attracted to lek by dominant male – Females attracted to lek by dominant male • Hotspots – Leks located in high-use areas Leks Leks • Hotshots Position of most successful – Females attracted to lek by dominant male male territory shifts (hot shot?) • Hotspots black grouse – Leks located in high-use areas • Female -
Plumage Coloration and Morphology in Chiroxiphia Manakins
PLUMAGE COLORATION AND MORPHOLOGY IN CHIROXIPHIA MANAKINS: INTERACTING EFFECTS OF NATURAL AND SEXUAL SELECTION Except where reference is made to the work of others, the work described in this dissertation is my own or was done in collaboration with my advisory committee. This dissertation does not include proprietary or classified information. _________________________________________ Stéphanie M. Doucet Certificate of Approval: _____________________ _____________________ F. Stephen Dobson Geoffrey E. Hill, Chair Professor Schamagel Professor Biological Sciences Biological Sciences ______________________ ______________________ Craig Guyer Stephen L. McFarland Professor Acting Dean Biological Sciences Graduate School PLUMAGE COLORATION AND MORPHOLOGY IN CHIROXIPHIA MANAKINS: INTERACTING EFFECTS OF NATURAL AND SEXUAL SELECTION Stéphanie M. Doucet A Dissertation Submitted to the Graduate Faculty of Auburn University in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy Auburn, Alabama May 11, 2006 PLUMAGE COLORATION AND MORPHOLOGY IN CHIROXIPHIA MANAKINS: INTERACTING EFFECTS OF NATURAL AND SEXUAL SELECTION Stéphanie M. Doucet Permission is granted to Auburn University to make copies of this dissertation at its discretion, upon request of individuals or institutions and at their expense. The author reserves all publication rights. ____________________________________ Signature of Author ____________________________________ Date of Graduation iii DISSERTATION ABSTRACT PLUMAGE COLORATION AND MORPHOLOGY IN CHIROXIPHIA MANAKINS: INTERACTING EFFECTS OF NATURAL AND SEXUAL SELECTION Stéphanie M. Doucet Doctor of Philosophy, May 11, 2006 (M.S. Queen’s University, 2002) (B.S. Queen’s University, 2000) 231 Typed Pages Directed by Dr. Geoffrey E. Hill I examined how natural and sexual selection may have influenced the morphology and coloration of Chiroxiphia manakins (Aves: Pipridae). In the first chapter, I investigated age– and sex–related patterns of plumage coloration and molt timing in long–tailed manakins, C. -
LEK&Hyphen;LIKE MATING SYSTEM of the MONOGAMOUS BLUE&Hyphen;BLACK GRASSQUIT
The Auk 118(2):404-411, 2001 LEK-LIKE MATING SYSTEM OF THE MONOGAMOUS BLUE-BLACK GRASSQUIT JULIANA B. ALMEIDA1'3 AND REGINA H. MACEDOTM •Departamentode Ecologia,Universidade de Brasilia,70910-900 Brasilia, Brazil; and 2Departamentode Zoologia,Universidade de Brasilia, 70910-900 Brasflia, Brazil ABSTRACT.--Inthis study, we investigatedthe role of display and mating systemof the little known NeotropicalBlue-black Grassquit (Volatinia jacarina). Males form aggregations and executea highly conspicuousdisplay, resembling traditional leks. Number of displaying malesdeclined throughout the study period, thoughdisplaying intensity during the season showedno variation. Individual maleshad significantlydifferent displayingrates and also defendedterritories of very different sizes,ranging from 13.0 to 72.5 m2, but we found no associationbetween territory sizes and the averagedisplaying ratesof the residentmales. There alsois no associationbetween displaying rates of malesand size and vegetationstruc- ture of their territories. Four of seven nests were found within male territories and obser- vationsindicated that both sexesinvest equally in caring for nestlings.Results suggest that the Blue-blackGrassquit does not fit into the traditionallek mating system,contrary to what hasbeen proposed in the scarceliterature available. However, it is clearthat theseapparently monogamousbirds behavelike a lekking species.We speculateabout the possibilitythat aggregationof nesting territoriesin this speciesmay be due to sexualselection pressures, and suggestthat the Blue-blackGrassquit may be an ideal candidateto test Wagner's(1997) hidden-lek hypothesis.Received 2 August1999, accepted17 October2000. SEXUALSELECTION in lekking species has and Wolf 1979), females do not nest within been the object of much attention during the male territories,but may dependupon resourc- last decades.A lek can be broadly defined as es within them. -
The Influence of Body Size on Sexual Dimorphism
University of Tennessee, Knoxville TRACE: Tennessee Research and Creative Exchange Masters Theses Graduate School 12-2017 The Influence of Body Size on Sexual Dimorphism Haley Elizabeth Horbaly University of Tennessee, Knoxville, [email protected] Follow this and additional works at: https://trace.tennessee.edu/utk_gradthes Part of the Biological and Physical Anthropology Commons Recommended Citation Horbaly, Haley Elizabeth, "The Influence of Body Size on Sexual Dimorphism. " Master's Thesis, University of Tennessee, 2017. https://trace.tennessee.edu/utk_gradthes/4970 This Thesis is brought to you for free and open access by the Graduate School at TRACE: Tennessee Research and Creative Exchange. It has been accepted for inclusion in Masters Theses by an authorized administrator of TRACE: Tennessee Research and Creative Exchange. For more information, please contact [email protected]. To the Graduate Council: I am submitting herewith a thesis written by Haley Elizabeth Horbaly entitled "The Influence of Body Size on Sexual Dimorphism." I have examined the final electronic copy of this thesis for form and content and recommend that it be accepted in partial fulfillment of the equirr ements for the degree of Master of Arts, with a major in Anthropology. Dawnie W. Steadman, Major Professor We have read this thesis and recommend its acceptance: Benjamin M. Auerbach, Michael W. Kenyhercz Accepted for the Council: Dixie L. Thompson Vice Provost and Dean of the Graduate School (Original signatures are on file with official studentecor r ds.) The Influence of Body Size on Sexual Dimorphism A Thesis Presented for the Master of Arts Degree The University of Tennessee, Knoxville Haley Elizabeth Horbaly December 2017 Copyright © 2017 by Haley Elizabeth Horbaly All rights reserved. -
Zoology Lab Manual
General Zoology Lab Supplement Stephen W. Ziser Department of Biology Pinnacle Campus To Accompany the Zoology Lab Manual: Smith, D. G. & M. P. Schenk Exploring Zoology: A Laboratory Guide. Morton Publishing Co. for BIOL 1413 General Zoology 2017.5 Biology 1413 Introductory Zoology – Supplement to Lab Manual; Ziser 2015.12 1 General Zoology Laboratory Exercises 1. Orientation, Lab Safety, Animal Collection . 3 2. Lab Skills & Microscopy . 14 3. Animal Cells & Tissues . 15 4. Animal Organs & Organ Systems . 17 5. Animal Reproduction . 25 6. Animal Development . 27 7. Some Animal-Like Protists . 31 8. The Animal Kingdom . 33 9. Phylum Porifera (Sponges) . 47 10. Phyla Cnidaria (Jellyfish & Corals) & Ctenophora . 49 11. Phylum Platyhelminthes (Flatworms) . 52 12. Phylum Nematoda (Roundworms) . 56 13. Phyla Rotifera . 59 14. Acanthocephala, Gastrotricha & Nematomorpha . 60 15. Phylum Mollusca (Molluscs) . 67 16. Phyla Brachiopoda & Ectoprocta . 73 17. Phylum Annelida (Segmented Worms) . 74 18. Phyla Sipuncula . 78 19. Phylum Arthropoda (I): Trilobita, Myriopoda . 79 20. Phylum Arthropoda (II): Chelicerata . 81 21. Phylum Arthropods (III): Crustacea . 86 22. Phylum Arthropods (IV): Hexapoda . 90 23. Phyla Onycophora & Tardigrada . 97 24. Phylum Echinodermata (Echinoderms) . .104 25. Phyla Chaetognatha & Hemichordata . 108 26. Phylum Chordata (I): Lower Chordates & Agnatha . 109 27. Phylum Chordata (II): Chondrichthyes & Osteichthyes . 112 28. Phylum Chordata (III): Amphibia . 115 29. Phylum Chordata (IV): Reptilia . 118 30. Phylum Chordata (V): Aves . 121 31. Phylum Chordata (VI): Mammalia . 124 Lab Reports & Assignments Identifying Animal Phyla . 39 Identifying Common Freshwater Invertebrates . 42 Lab Report for Practical #1 . 43 Lab Report for Practical #2 . 62 Identification of Insect Orders . 96 Lab Report for Practical #3 . -
Female Mate Fidelity in a Lek Mating System and Its Implications for the Evolution of Cooperative Lekking Behavior
The University of Chicago Female Mate Fidelity in a Lek Mating System and Its Implications for the Evolution of Cooperative Lekking Behavior. Author(s): E. H. DuVal Reviewed work(s): Source: The American Naturalist, Vol. 181, No. 2 (February 2013), pp. 213-222 Published by: The University of Chicago Press for The American Society of Naturalists Stable URL: http://www.jstor.org/stable/10.1086/668830 . Accessed: 28/01/2013 11:42 Your use of the JSTOR archive indicates your acceptance of the Terms & Conditions of Use, available at . http://www.jstor.org/page/info/about/policies/terms.jsp . JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact [email protected]. The University of Chicago Press, The American Society of Naturalists, The University of Chicago are collaborating with JSTOR to digitize, preserve and extend access to The American Naturalist. http://www.jstor.org This content downloaded on Mon, 28 Jan 2013 11:42:28 AM All use subject to JSTOR Terms and Conditions vol. 181, no. 2 the american naturalist february 2013 Female Mate Fidelity in a Lek Mating System and Its Implications for the Evolution of Cooperative Lekking Behavior E. H. DuVal* Department of Biological Science, Florida State University, Tallahassee, Florida 32306 Submitted May 25, 2012; Accepted September 23, 2012; Electronically published December 26, 2012 Dryad data: http://dx.doi.org/10.5061/dryad.vb808. -
A Female Lek Mating System in the Worm Pipefish (Nerophis Lumbriciformis) Nuno Monteiro, Diana Carneiro, Nuno Queirós, Agostinh
A female lek mating system in the worm pipefish (Nerophis lumbriciformis) Nuno Monteiro, Diana Carneiro, Nuno Queirós, Agostinho Antunes, Natividad Vieira, Adam Jones Presenting Author: Nuno Monteiro University of Porto, Portugal and University Fernando Pessoa and Texas A&M University, USA Lek mating systems, in which one sex gathers to display at a well-defined spatial location and the other arrives for the sole purpose of choosing a mate, remain an enduring puzzle for sexual selection theory. The most perplexing aspect of this mating system is embodied by the “paradox of the lek”: in the face of the strong directional selection imposed by mate choice, genetic variation among competing individuals should rapidly disappear, thus negating any benefit for the choosing sex. Here, we show that a marine pipefish, Nerophis lumbriciformis, has an extremely unusual mating system characterized by lekking females. Males, who provide all post-zygotic care to ventrally attached offspring, visit the lek and mate with the most attractive females. In this sex-role-reversed lek, the direct benefits to males are more obvious than in traditional systems as they receive fuller broods of larger eggs when mating with the most ornamented lekking females. Female display traits honestly reflect their reproductive potential, as ornaments are costly to maintain and expressed in a condition-dependent manner. Indirect selection on mating preferences is not necessary to explain the establishment and maintenance of the worm pipefish mating system, so the paradox of the lek appears not to apply to this species. Similar, but subtler, mechanisms could contribute to the maintenance of leks in species with "conventional" sex roles. -
Sexual Selection and Mate Choice
Review TRENDS in Ecology and Evolution Vol.21 No.6 June 2006 Sexual selection and mate choice Malte Andersson1 and Leigh W. Simmons2 1Department of Zoology, University of Gothenburg, SE 405 30 Gothenburg, Sweden 2Centre for Evolutionary Biology, School of Animal Biology (M092), The University of Western Australia, Crawley 6009, WA, Australia The past two decades have seen extensive growth of characterization of genes and their effects, from DNA sexual selection research. Theoretical and empirical sequences via protein to phenotypic expression at the level work has clarified many components of pre- and of the individual, with possible consequences at the postcopulatory sexual selection, such as aggressive population level and above. competition, mate choice, sperm utilization and sexual conflict. Genetic mechanisms of mate choice evolution Evolution of mate choice have been less amenable to empirical testing, but Although mate choice occurs in males and females [4], for molecular genetic analyses can now be used for incisive convenience we refer here to female choice of male traits. experimentation. Here, we highlight some of the As experimental evidence accumulated, mate choice currently debated areas in pre- and postcopulatory became widely recognized, but the genetic mechanisms sexual selection. We identify where new techniques underlying its evolution remain the subject of debate can help estimate the relative roles of the various (Box 1). Showing how mating preferences evolve geneti- selection mechanisms that might work together in the cally is harder than showing that they exist, and the evolution of mating preferences and attractive traits, problem is aggravated by the possibility that several and in sperm–egg interactions. -
Sexual Behaviour of Rams:Male Orientation and Its Endocrine Correlates
JournalofReproductionandFertilitySupplement54, 259-269 Sexual behaviour of rams:male orientation and its endocrine correlates J. A. Resko1, A. Perkins2, C. E. Roselli1, J. N. Stellflug3 and F. K. Stormshak4 'Department of Physiology and Pharmacology, School of Medicine, Oregon Health Sciences University, Portland, OR 97201-3098, USA; 'Department of Psychology, Carroll College,Helena, MAO 59625, USA; 'US Sheep Experimentation Station, Dubois, ID 83425, USA; and 4Department of Animal Sciences, Oregon State University, Corvallis, OR 97331-6702, USA The components of heterosexual behaviour in rams are reviewed as a basis for understanding partner preference behaviour. A small percentage of rams will not mate with oestrous females and if given a choice will display courtship behaviour towards another ram in preference to a female. Some of the endocrine profiles of these male- oriented rams differ from those of heterosexual controls. These differences include reduced serum concentrations of testosterone, oestradiol and oestrone, reduced capacity to produce testosterone in vitro, and reduced capacity to aromatize androgens in the preoptic-anterior hypothalamus of the brain. Our observation that aromatase activity is significantly lower in the preoptic-anterior hypothalamic area of male-oriented rams than in female-oriented rams may indicate an important neurochemical link to sexual behaviour that should be investigated. The defect in steroid hormone production by the adult testes of the male-oriented ram may represent a defect that can be traced