2012Nekarisknow 23 L

Total Page:16

File Type:pdf, Size:1020Kb

2012Nekarisknow 23 L ANIMAL BEHAVIOUR ANNA NEKARIS Heniam, velenis ismolor sumsan vendit lum num qui eu faciliq uamconum venim nisl il iniamet la a LOW RES Bite for Getty Driven to the edge of extinction by the pet trade due to their ris A survival teddy-bear looks, the Javan slow loris has a deadly bite. nek A Ann Anna Nekaris uncovers the plight of the poisonous primate. 72 May/Jun 2012 ANIMAL BEHAVIOUR ntil three years ago, many people Last year, I travelled to Java to begin a ANNA NEKARIS U would not have known what three-year study into why slow lorises have a slow loris was. A Dr Seuss venom. We already knew that they are able character, perhaps? Or maybe a cocktail? to produce it themselves, and last summer LOW RES But then a YouTube video of a pet loris found that they supplement it with toxins being tickled turned a small, obscure absorbed from their food. But why do they nocturnal primate into a global celebrity. even need venom? That clip has now been viewed millions of The venom delivery system of lorises times. If you search online for ‘slow loris’, is wholly peculiar. Their upper arms each it is one of the top results. have a brachial gland that produces thick, Since then, a series of loris videos have brown, vile-smelling oil. This gloop gone viral, attracting an army of online appears harmless but, when mixed with fans. Most aren’t conservationists, though. the loris’s saliva, it can be lethal to small At. Ut alismodip estie dolobor alit aute ex eum They just want lorises as pets. But these animals. Even humans have died from iriure volor sequam vullan exer sed tissecte cuddly creatures harbour a deadly secret. anaphylactic shock when bitten. The five known species of slow loris are the planet’s only poisonous primates, with Crosshead here be an advantage. But observing them a bite so dangerous it can kill. And there’s Venomous mammals are only slightly more hunting at night would be difficult. So I no anti-venom. common than hens with teeth. Just six headed to the Ciapus Primate Centre in When I first saw the video, I thought other species are known – the European western Java, the only sanctuary in Asia back to my many experiences of lorises in mole and water shrew, the short-tailed specialising in the care of slow lorises the field. There was the time my tough, shrew, the Cuban and Haitian solenodons rescued from the pet trade. machete-wielding Cambodian guide Mr and the duck-billed platypus. (A seventh I wanted to know if a loris bites to kill Hao was nipped by a pygmy slow loris. species, the European hedgehog, is thought instantly – and my findings were startling. The erstwhile fearless forester dropped the to possess venomous saliva.)Niat, All venim use their iliquis The Javan lorises I observed almost always killer fluffball in panic and started sucking venom to subdue prey, exceptat. Agnibh for the esequate decapitated their victims, ripping the heads modolorper susto del et the poison from his wound, blood dripping platypus, which exudes itsvolorem poison zzritfrom lor augiam,off with gusto. I wasn’t convinced venom to the ground. Maybe, I thought, if I found defensive spurs on its hind legs. is necessary for an animal that possesses out more about loris venom I could use the Since lorises tackle relatively large prey such powerful teeth and jaws. information to deter would-be pet owners. such as lizards, frogs and bats, venom could A change of tack was needed. Local people often have unique insight into the behaviour of animals on their patch, especially dangerous ones, so I decided Mr kokan told me that The loris is to ask them about loris venom. I visited the Kasipuhan, a tribe that lives within more dangerous than the leopard, and Gunung Halimun Salak National E ANNA NEKARIS Wawan Tarniwan n x2 A rniw A nt Wawan Tarniwan A w A ris x2, w A Niat, venim iliquis nek at. Agnibh esequate A Niat, venim iliquis at. Agnibh esequate modolorper susto del et Ann modolorper susto del et volorem zzrit lor Niat, venim iliquis at. Agnibh esequate modolorper susto del et volorem zzrit lor augiam, volorem zzrit lor augiam, 74 May/Jun 2012 ANIMAL BEHAVIOUR Niat, venim iliquis at. Agnibh esequate modolorper susto del et volorem zzrit lor augiam, FACTSHEET E Park, one of Java’s last remaining problem facing the staff of the Ciapus males and females. pristine forested areas. Mr Kokan, a self- Primate Centre. Many lorises taken into Conflict usually breaks out during the proclaimed ‘protector of the forest’, seemed captivity suffer from severe head wounds mating season, when numerous males – a likely source of information. But when I that, if they heal, leave terrible scars. sometimes as many as 10 – may compete asked him about the muka geni, or ‘little Ciapus vets report that a loris injured by for a single female. Rival suitors hurl each fireface’, the room fell silent. a branch or wire heals quickly, but a loris other out of trees; they bite, gouge, grapple Mr Kokan explained that the loris is bitten by another loris often develops and utter a wide variety of chittering more dangerous than the leopard – it stops festering necrosis. Could lorises perhaps, and whistling calls. The combatants are and stares, whereas the big cat runs away. like platypuses, have evolved venom for invariably left with nasty scars. It is more feared than any snake because use against their own kind? It was an there is no cure for its venom, and any intriguing hypothesis. Crosshead here grass touched by its toxic urine withers and Slow lorises have a complex system of I needed to catch some lorises to examine dies. “But there is nothing more deadly overlapping home ranges. Though the their scars and fit them with radio ANNA NEKARIS than loris blood,” Mr Kokan told me. If a norm is for an adult male and female to transmitters, but I soon discovered that dog kills a loris and brings it to the village, live together, their territory will be visited it wasn’t going to be easy. Lorises have a the corpse could poison the entire water by lower-status males, and offspring of knack of avoiding traps. I met an ex-hunter supply. various ages may also be present. Lorises called Mr Ade who described how he As I left the village my mind was vigorously defend territorial boundaries used to collect lorises to sell on the black buzzing, and I started musing about a – I’ve seen vicious same-sex fights among market. He would wake before dawn and Mr Ade had stopped catching lorises be hidden away ‘under the counter’. ANNA NEKARIS watch as the sunlight filtered through because of the suffering he could see in Unfortunately not. I found dozens of stands of bamboo, picking out the furry their faces when the middlemen ripped them, from Borneo and Sumatra as well as Mr kokan told me that The loris is more forms of sleeping lorises. He often found their teeth out with wire cutters. This Java, openly for sale. several individuals dozing together. For horrific – but, sadly, widespread – practice I even came across lorises for sale next each loris he supplied, traders paid him less prevents lorises destined for the pet trade to police cars and in front of coffee shops LAtIN NAME: /Nycticebus javanicus/ dangerous than the leopard, and that than the price of a pack of cigarettes. from delivering their toxic bite. at upmarket malls in the cities of Jakarta COMMON NAME: Javan slow loris Mr Ade took me to farmland where he and Bandung. Most of the animals were LENgtH: 27-31cm (10.6-12.2in) used to find his lorises. I didn’t understand priced at around £25 – a far cry from the WEIgHt: 750g-1.15kg (26.5-40.5oz) how he could locate them so easily. The 40p that the original captor of each poor A few more ANimAls witH AN uNexPeCteD stiNg iN tHe tAil Javan slow loris is one of the 25 most animal received for this prize. DIEt: Mostly flowers and gum; also lizards, endangered primates in the world – since I don’t yet know why lorises are frogs, bats, snails, insects and fruit. 2006 I had seen fewer than 30 of them in venomous, but I do know that if the illegal LIfE-CyCLE: Female gives birth to one or two the wild. When we arrived, I observed pet trade continues unchecked, I won’t babies after a gestation of six months. neat lines of carrots and chillies, and a sea have long to find out. My dream is that HABItAt: Originally lowland primary rainforest; of cabbages intersected by row after row of my research will help to convince people also cultivated land around villages. tea plants. Hardly prime loris habitat, you around the world that these gremlin-like IDENtIfyINg fEAtUREs: Dark eye rings, with might think. primates – all species of which are sadly a white diamond between; dark stripe down endangered – are better off in the forest back. Fur can be short or very fluffy – two Crosshead here [A version of this article first appeared in BBC Wildlife Magazine] forms considered by some to be separate But scattered through the fields were species. trees bearing fruits the lorises relish and Anna Nekaris reader in anthropology, stAtUs: Endangered. Threats include flowers that they love – though to reach G Hooded Pitohui G Centipede G Duck-Billed Platypus G Cone snail course tutor MSc in Primate Conservation deforestation and hunting for the pet and PA Native to Indonesia and Papua There are thought to be around Found in the freshwater rivers There are hundreds of species of them, the primates would need to crawl at Oxford Brookes University and Director traditional medicine trades.
Recommended publications
  • Cone Snail Case
    Cone Snail case Cone snail molecular phylogeny Cone snail video Snail Venom Yields Potent Painkiller, But Delivering The Drug Is Tricky Updated August 4, 201510:52 AM ETPublished August 3, 20153:30 PM ET http://www.npr.org/sections/health-shots/2015/08/03/428990755/snail-venom- yields-potent-painkiller-but-delivering-the-drug-is-tricky Magician’s cone (Conus magus) The magician’s cone, Conus magus, is a fish-hunting, or piscivorous cone snail found in the Western Pacific. It is so common in some of small Pacific islands, especially in the Philippines, that it is routinely sold in the market as food. The magician’s cone attacks its fish prey by sticking out its light yellowish proboscis, from which venom is pushed through a harpoon-like tooth. It hunts by the hook-and-line method and so will engulf its prey after it has been paralyzed. To learn more about hook-and-line hunters, click here. Scientists have analyzed the venom of the magician’s cone and one of its venom components was discovered to have a unique pharmacological activity by blocking a specific calcium channel (N-type). After this venom component was isolated and characterized in a laboratory, researchers realized that it had potential medical application. By blocking N-type calcium channels, the venom blocks channels that when open convey pain from nerve cells. If this is blocked, the brain cannot perceive these pain signals. It was developed as a pain management drug, and is now chemically synthesized and sold under the trade name Prialt. This drug is given to patients who have very severe pain that is not alliviated by morphine.
    [Show full text]
  • Shell Classification – Using Family Plates
    Shell Classification USING FAMILY PLATES YEAR SEVEN STUDENTS Introduction In the following activity you and your class can use the same techniques as Queensland Museum The Queensland Museum Network has about scientists to classify organisms. 2.5 million biological specimens, and these items form the Biodiversity collections. Most specimens are from Activity: Identifying Queensland shells by family. Queensland’s terrestrial and marine provinces, but These 20 plates show common Queensland shells some are from adjacent Indo-Pacific regions. A smaller from 38 different families, and can be used for a range number of exotic species have also been acquired for of activities both in and outside the classroom. comparative purposes. The collection steadily grows Possible uses of this resource include: as our inventory of the region’s natural resources becomes more comprehensive. • students finding shells and identifying what family they belong to This collection helps scientists: • students determining what features shells in each • identify and name species family share • understand biodiversity in Australia and around • students comparing families to see how they differ. the world All shells shown on the following plates are from the • study evolution, connectivity and dispersal Queensland Museum Biodiversity Collection. throughout the Indo-Pacific • keep track of invasive and exotic species. Many of the scientists who work at the Museum specialise in taxonomy, the science of describing and naming species. In fact, Queensland Museum scientists
    [Show full text]
  • Disaggregation of Bird Families Listed on Cms Appendix Ii
    Convention on the Conservation of Migratory Species of Wild Animals 2nd Meeting of the Sessional Committee of the CMS Scientific Council (ScC-SC2) Bonn, Germany, 10 – 14 July 2017 UNEP/CMS/ScC-SC2/Inf.3 DISAGGREGATION OF BIRD FAMILIES LISTED ON CMS APPENDIX II (Prepared by the Appointed Councillors for Birds) Summary: The first meeting of the Sessional Committee of the Scientific Council identified the adoption of a new standard reference for avian taxonomy as an opportunity to disaggregate the higher-level taxa listed on Appendix II and to identify those that are considered to be migratory species and that have an unfavourable conservation status. The current paper presents an initial analysis of the higher-level disaggregation using the Handbook of the Birds of the World/BirdLife International Illustrated Checklist of the Birds of the World Volumes 1 and 2 taxonomy, and identifies the challenges in completing the analysis to identify all of the migratory species and the corresponding Range States. The document has been prepared by the COP Appointed Scientific Councilors for Birds. This is a supplementary paper to COP document UNEP/CMS/COP12/Doc.25.3 on Taxonomy and Nomenclature UNEP/CMS/ScC-Sc2/Inf.3 DISAGGREGATION OF BIRD FAMILIES LISTED ON CMS APPENDIX II 1. Through Resolution 11.19, the Conference of Parties adopted as the standard reference for bird taxonomy and nomenclature for Non-Passerine species the Handbook of the Birds of the World/BirdLife International Illustrated Checklist of the Birds of the World, Volume 1: Non-Passerines, by Josep del Hoyo and Nigel J. Collar (2014); 2.
    [Show full text]
  • The Avifauna of Mt. Karimui, Chimbu Province, Papua New Guinea, Including Evidence for Long-Term Population Dynamics in Undisturbed Tropical Forest
    Ben Freeman & Alexandra M. Class Freeman 30 Bull. B.O.C. 2014 134(1) The avifauna of Mt. Karimui, Chimbu Province, Papua New Guinea, including evidence for long-term population dynamics in undisturbed tropical forest Ben Freeman & Alexandra M. Class Freeman Received 27 July 2013 Summary.—We conducted ornithological feld work on Mt. Karimui and in the surrounding lowlands in 2011–12, a site frst surveyed for birds by J. Diamond in 1965. We report range extensions, elevational records and notes on poorly known species observed during our work. We also present a list with elevational distributions for the 271 species recorded in the Karimui region. Finally, we detail possible changes in species abundance and distribution that have occurred between Diamond’s feld work and our own. Most prominently, we suggest that Bicolored Mouse-warbler Crateroscelis nigrorufa might recently have colonised Mt. Karimui’s north-western ridge, a rare example of distributional change in an avian population inhabiting intact tropical forests. The island of New Guinea harbours a diverse, largely endemic avifauna (Beehler et al. 1986). However, ornithological studies are hampered by difculties of access, safety and cost. Consequently, many of its endemic birds remain poorly known, and feld workers continue to describe new taxa (Prat 2000, Beehler et al. 2007), report large range extensions (Freeman et al. 2013) and elucidate natural history (Dumbacher et al. 1992). Of necessity, avifaunal studies are usually based on short-term feld work. As a result, population dynamics are poorly known and limited to comparisons of diferent surveys or diferences noticeable over short timescales (Diamond 1971, Mack & Wright 1996).
    [Show full text]
  • Toxic Birds Not of a Feather
    Commentary Avian chemical defense: Toxic birds not of a feather Paul J. Weldon Conservation and Research Center, Smithsonian Institution, 1500 Remount Road, Front Royal, VA 22630 n 1992, Dumbacher et al. (1) substan- Itially altered prevailing views of avian physiology, biochemistry, and chemical ecology with their report of the potent neurotoxin homobatrachotoxinin in feathers and other tissues of several spe- cies of New Guinean passerine birds of the genus Pitohui. Their discovery was signif- icant not only for suggesting a protective mechanism rarely considered for birds (i.e., chemical defense) but for the nature of the compound they discovered, a struc- turally complex alkaloid that binds Naϩ channels and depolarizes electrogenic membranes. Alkaloids in tetrapods gen- erally had been thought to be confined to amphibians, whose skins have long been acknowledged as arsenals of these biolog- Fig. 1. Hornets (Vespa orientalis) attacking a freshly skinned carcass of a laughing dove (Steptopelia ically active compounds (2). Indeed, be- senegalensis)(Left) while ignoring that of a pied kingfisher (Ceryle rudis). This observation prompted H. B. fore its discovery in Pitohui, homobatra- Cott (4) to undertake an extensive investigation of avian chemical defense. [Reproduced with permission chotoxinin, a member of a family of from ref. 4 (Copyright 1947, The Zoological Society of London).] steroidal alkaloids called batrachotoxinins (BTXs), had been found only in skin se- cretions of Central and South American dichrous), the most toxic of the birds they An additional enigma described by poison-dart frogs (Dendrobatidae) of the examined, is aposematic and may be Dumbacher et al. (3) is the profound genus Phyllobates.
    [Show full text]
  • Antiproliferative Effect of the Red Sea Cone Snail, Conus Geographus
    Alburae & Mohammed Tropical Journal of Pharmaceutical Research March 2020; 19 (3): 577-581 ISSN: 1596-5996 (print); 1596-9827 (electronic) © Pharmacotherapy Group, Faculty of Pharmacy, University of Benin, Benin City, 300001 Nigeria. Available online at http://www.tjpr.org http://dx.doi.org/10.4314/tjpr.v19i3.17 Original Research Article Antiproliferative effect of the Red Sea cone snail, Conus geographus Najla Ali Alburae1*, Afrah Eltayeb Mohammed2 1Department of Biology, Faculty of Science, King Abdulaziz University, PO Box 80203, Jeddah 21589, 2Biology Department, College of Science, Princess Nourah bint Abdulrahman University, PO Box 84428, Riyadh 11671, Saudi Arabia *For correspondence: Email: [email protected]; Tel.: +966-50-33710116 Sent for review: 19 October 2019 Revised accepted: 21 February 2020 Abstract Purpose: To investigate the antiproliferative effect of the Red Sea cone snail, Conus geographus, against 4 MCF-7 (breast), MDA-MB-231 (epithelial human breast), HepG2 (hepatocellular) and SKOV-3 (ovarian) cancer cell lines. Methods: Extraction of Red Sea cone snail sample with a mixture of CH2Cl2 and CH3OH (1:1, v/v) yielded 0.55 g of a green viscous material. The cytotoxic effects of the organic extract against the cancer cell lines were determined using cell proliferation (MTT) assay, and the half-maximal concentration (IC50) values measured. The effect of the crude extract on the cell cycle of the HepG-2 was determined by flow cytometry. Results: The extract produced significant inhibitory effects against SKOV-3, MDA-MB-231, MCF-7 and HepG2, with IC50 values of 22.7 ± 2.2, 68.7 ± 6.2, 47 ± 4.2 and 19 ± 2.1 µg/mL, respectively.
    [Show full text]
  • WIAD CONSERVATION a Handbook of Traditional Knowledge and Biodiversity
    WIAD CONSERVATION A Handbook of Traditional Knowledge and Biodiversity WIAD CONSERVATION A Handbook of Traditional Knowledge and Biodiversity Table of Contents Acknowledgements ...................................................................................................................... 2 Ohu Map ...................................................................................................................................... 3 History of WIAD Conservation ...................................................................................................... 4 WIAD Legends .............................................................................................................................. 7 The Story of Julug and Tabalib ............................................................................................................... 7 Mou the Snake of A’at ........................................................................................................................... 8 The Place of Thunder ........................................................................................................................... 10 The Stone Mirror ................................................................................................................................. 11 The Weather Bird ................................................................................................................................ 12 The Story of Jelamanu Waterfall .........................................................................................................
    [Show full text]
  • Bird Abundances in Primary and Secondary Growths in Papua New Guinea: a Preliminary Assessment
    Mongabay.com Open Access Journal - Tropical Conservation Science Vol.3 (4):373-388, 2010 Research Article Bird abundances in primary and secondary growths in Papua New Guinea: a preliminary assessment Kateřina Tvardíková1 1 Department of Zoology, Faculty of Biological Science, University of South Bohemia, Branišovská 31, CZ- 370 05 České Budějovice. Email: <[email protected] Abstract Papua New Guinea is the third largest remaining area of tropical forest after the Amazon and Congo basins. However, the growing intensity of large-scale slash-and-burn agriculture and logging call for conservation research to assess how local people´s traditional land-use practices result in conservation of local biodiversity, of which a species-rich and diverse component is the avian community. With this in mind, I conducted a preliminary survey of birds in small-scale secondary plots and in adjacent primary forest in Wanang Conservation Area in Papua New Guinea. I used mist-netting, point counts, and transect walks to compare the bird communities of 7-year-old secondary growth, and neighboring primary forest. The preliminary survey lasted 10 days and was conducted during the dry season (July) of 2008. I found no significant differences in summed bird abundances between forest types. However, species richness was higher in primary forest (98 species) than in secondary (78 species). The response of individual feeding guilds was also variable. Two habitats differed mainly in presence of canopy frugivores, which were more abundant (more than 80%) in primary than in secondary forests. A large difference (70%) was found also in understory and mid-story insectivores. Species occurring mainly in secondary forest were Hooded Butcherbird (Cracticus cassicus), Brown Oriole (Oriolus szalayi), and Helmeted Friarbird (Philemon buceroides).
    [Show full text]
  • West Papua – Birds-Of-Paradise and Endemics of the Arfaks and Waigeo
    INDONESIA: WEST PAPUA – BIRDS-OF-PARADISE AND ENDEMICS OF THE ARFAKS AND WAIGEO 03 – 14 AUGUST 2022 03 – 14 AUGUST 2023 Wilson’s Bird-of-paradise is often considered one of the best-looking birds in the world! www.birdingecotours.com [email protected] 2 | ITINERARY Indonesia: West Papua – Arfak and Waigeo New Guinea is a geographic rather than political term that refers to the main island in the region. The western half of the island of New Guinea comprises the Indonesian provinces of West Papua (Papua Barat) and Papua, collectively once called West Irian or Irian Jaya; the eastern half of the main island of New Guinea comprises the country of Papua New Guinea. We will be based in West Papua for this exhilarating, small-group birding adventure. Aside from the large landmass of New Guinea, the New Guinea region includes numerous small islands (some part of Indonesia and others part of Papua New Guinea), and we will visit one of these areas: Waigeo, part of the Raja Ampat Archipelago in West Papua (also known as the Northwestern Islands). Approximately 680 bird species have been recorded from West Papua, from slightly more than 700 for the whole New Guinea region. Some 550 species are considered breeding residents, with 279 New Guinea endemics (found in Indonesia and/or Papua New Guinea) and at least an additional 42 endemics found only in West Papua. There are also over 115 Palearctic and Australian migrant species and a range of seabirds which spend some of their time in West Papua. This tour will begin in the town of Manokwari, situated on the north-eastern tip of West Papua's Bird's Head (or Vogelkop) Peninsula where we could get our tour started with the gorgeous Lesser Bird-of-paradise, this area is usually great for Blyth’s Hornbill and numerous fruit doves.
    [Show full text]
  • Gene Flow in the Mu¨ Llerian Mimicry Ring of a Poisonous Papuan Songbird Clade (Pitohui; Aves)
    GBE Gene Flow in the Mu¨ llerian Mimicry Ring of a Poisonous Papuan Songbird Clade (Pitohui; Aves) Kritika M. Garg1, Katerina Sam2,3,†, Balaji Chattopadhyay1,†, Keren R. Sadanandan1, Bonny Koane4, Per G.P. Ericson5,andFrankE.Rheindt 1,* 1Department of Biological Sciences, National University of Singapore 2Biology Centre of Czech Academy of Sciences, Institute of Entomology, Ceske Budejovice, Czech Republic 3Faculty of Science, University of South Bohemia, Ceske Budejovice, Czech Republic 4The New Guinea Binatang Research Centre, Madang, Papua New Guinea 5Department of Zoology, Swedish Museum of Natural History, Stockholm, Sweden †These authors contributed equally to this work. *Corresponding author: E-mail: [email protected]. Accepted: June 25, 2019 Data deposition: This project has been deposited at NCBI under the accessions MK519502–MK519541 (for MC1R gene sequences), SRP158801 (for ddRAD-Seq data), and QWTY00000000 (for the rusty pitohui genome). Abstract Mu¨ llerian mimicry rings are remarkable symbiotic species assemblages in which multiple members share a similar phenotype. However, their evolutionary origin remains poorly understood. Although gene flow among species has been shown to generate mimetic patterns in some Heliconius butterflies, mimicry is believed to be due to true convergence without gene flow in many other cases. We investigated the evolutionary history of multiple members of a passerine mimicry ring in the poisonous Papuan pitohuis. Previous phylogenetic evidence indicates that the aposematic coloration shared by many, but not all, members of this genus is ancestral and has only been retained by members of the mimicry ring. Using a newly assembled genome and thousands of genomic DNA markers, we demonstrate gene flow from the hooded pitohui (Pitohui dichrous) into the southern variable pitohui (Pitohui uropygialis), consistent with shared patterns of aposematic coloration.
    [Show full text]
  • Radular Morphology of Conus (Gastropoda: Caenogastropoda: Conidae) from India
    Molluscan Research 27(3): 111–122 ISSN 1323-5818 http://www.mapress.com/mr/ Magnolia Press Radular morphology of Conus (Gastropoda: Caenogastropoda: Conidae) from India J. BENJAMIN FRANKLIN, 1, 3 S. ANTONY FERNANDO, 1 B. A. CHALKE, 2 K. S. KRISHNAN. 2, 3* 1.Centre of Advanced Study in Marine Biology, Annamalai University, Parangipettai-608 502, Cuddalore, Tamilnadu, India. 2.Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai-400 005, India. 3.National Centre for Biological Sciences, TIFR, Old Bellary Road, Bangalore-560 065, India.* Corresponding author E-mail: (K. S. Krishnan): [email protected]. Abstract Radular morphologies of 22 species of the genus Conus from Indian coastal waters were analyzed by optical and scanning elec- tron microscopy. Although the majority of species in the present study are vermivorous, all three feeding modes known to occur in the genus are represented. Specific radular-tooth structures consistently define feeding modes. Species showing simi- lar feeding modes also show fine differences in radular structures. We propose that these structures will be of value in species identification in cases of ambiguity in other characteristics. Examination of eight discrete radular-tooth components has allowed us to classify the studied species of Conus into three groups. We see much greater inter-specific differences amongst vermivorous than amongst molluscivorous and piscivorous species. We have used these differences to provide a formula for species identification. The radular teeth of Conus araneosus, C. augur, C. bayani, C. biliosus, C. hyaena, C. lentiginosus, C. loroisii, and C. malacanus are illustrated for the first time. In a few cases our study has also enabled the correction of some erroneous descriptions in the literature.
    [Show full text]
  • Phylogenetic Evidence for Colour Pattern Convergence in Toxic Pitohuis
    doi 10.1098/rspb.2001.1717 Phylogeneticevidencefor colourpattern convergenceintoxicpitohuis: Mu ¨ llerianmimicry in birds? JohnP.Dumbacher * and RobertC. Fleischer Molecular Genetics Laboratory,National Zoological Park, Smithsonian Institution,Washington, DC 20008, USA Birdspecies inthe genus Pitohui arechemically defended by a potentneurotoxic alkaloid in their skinand feathers. Thetwo most toxicpitohui species, the hoodedpitohui ( Pitohuidichrous )andthe variablepitohui (Pitohuikirhoce phalus ),aresometimes strikinglypatterned and,in certain portionsof their geographical ranges,both species sharea nearlyidentical colour pattern, whereasin otherareas they do not. MÏ llerian mimicry (the mutualresemblance oftwo chemically defended prey species) is commonin some other animalgroups and Pitohui birds havebeen suggested as one of the most likelycases inbirds. Here, we examinepitohui plumage evolution in the contextof a well-supportedmolecular phylogeny and use a maximumlikelihood approach to test forconvergent evolution in coloration. W eshowthat the `mimetic’ phenotypeis ancestralto both species andthat the resemblance inmost races is better explainedby a sharedancestry .One largeclade of P.kirhocephalus lost this mimetic phenotypeearly in their evolution andone race nested deepwithin this cladeappears to have re-evolved this phenotype.These latter ¢nd- ingsare consistent withthe hypothesisthat MÏllerian mimicry is drivingthe evolutionfor a similar colourpattern between P. dichrous,but onlyin this oneclade of P.kirhocephalus . Keywords:
    [Show full text]