DOCSLIB.ORG

Aquatic Invasive Species

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Aquatic Invasive Species 2016 Focal AIS Species List The following list of focal AIS was developed in coordination with Portland State University, Oregon State University, Oregon Department of Fish and Wildlife, and Washington Department of Fish and Wildlife. It will be reviewed and adjusted annually. Pertinent AIS from this list will be included in survey efforts. Other AIS considered a local threat can be added to this minimal list. Type Common name Genus species Species Code New Zealand mudsnails Potamopyrgus antipodarum POAN Zebra mussels Dreissena polymorpha DRPO Quagga mussels Dreissena rostriformis bugensis DRRO Rusty Crayfish Orconectes rusticus ORRU Red Swamp Crayfish Procambarus clarkii PRCL Aquatic Ringed Crayfish Orconectes neglectus ORNE animals Bullfrog Rana catesbeiana RACO Northern Crayfish Orconectes virilis ORVI Nutria Myocaster coypus MYCO Asian Clam Corbicula flumina COFL Chinese mystery snail Cipangopaludina chinensis CICH Big Eared Radix Radix auricularia RAAU Yellow Flag Iris Iris pseudacorus IRPS Hydrilla Hydrilla verticillata HYVE Nonnative Milfoils Myriophyllum species MYSP Yellow Floating Heart Nymphoides peltata NYPE Giant Salvinia Salvinia molesta SAMO Giant Reed Arundo donax ARDO Aquatic Brazilian Elodea Egeria densa EGDE plants Didymo Didymosphenia geminata DIGE Flowering rush Butomus umbellatus BUUM Common reed Phragmites austalis PHAU Curly-leaf pondweed Potamogeton crispus POCR Purple Loosestrife Lythrum salicaria LYSA Garden Loosestrife Lysimachia vulgaris LYVU Water primrose Ludwigia spp. LU Terrestrial animals Feral Swine Sus scrofa SUSC Japanese Knotweed Fallopia japonica FAJA Hybrid Bohemian Polygonumx bohemicum POBO Knotweed Terrestrial Giant Knotweed Polygonum sachalinese POSA plants Giant Hogweed Heracleum mantegazzianum HEMA Old Man’s Beard Clematis vitalba CLVI Garlic Mustard Alliaria petiolata ALPE Himalayan blackberry Rubus discolor RUDI 1 English Ivy Hedera helix HEHE Salt Cedar Tamarisk ramosissima TARA Orange hawkweed Hieracium aurantiacum HIAU Yellow archangel Lamiastrum galebdolon LAGA Invasive Aquatic Animals New Zealand mudsnails (Potamopyrgus antipodarum) These prolific snails often dominate the benthic habitat where they are found. Population densities of 100,000/m2 are common in some rivers, comprising up to 95% of the macro- invertebrate biomass. They can out-compete and displace native macro-invertebrates that other species depend on for food. Disruption of the food chain has led to reduced growth rates and lower populations of fish species. The New Zealand mudsnail is often introduced through ship ballast water and aquaculture operations. Once introduced to a region, mudsnails can spread quickly by hitchhiking on the wading gear, boats, and trailers of fishermen, boaters, and watershed workers. The problem with hitchhiking is magnified by the mudsnail’s small size and ability to survive extreme conditions. 0.7 mm Surveyors and anglers are very likely vectors of this invader, carrying these small snails attached to their gear. Gear treatment is essential to avoid accidental transfer from infected waters to pristine waters. 2 Zebra Mussel (Dreissena polymorpha) This tiny, fingernail sized, mussel is native to the Caspian Sea and has the ability to completely transform ecosystems. Annually, zebra mussels cause hundreds of million dollars worth of economic damage by clogging industrial and residential water-intake pipes. Loss of native mussel populations in the Great Lakes and Mississippi river is one the best documented impact of zebra mussels. Not only do they compete with them for food, but massive zebra mussel colonization of native mussels causes suffocation, shell deformity, starvation, and energetic stress leading to death. The mussel has an amazing capacity as a filter feeder to increase water clarity, and this can lead to greater blooms of algae. Toxic algae blooms poison the water, making people sick, and can kill small animals. 1.5 cm Anglers and surveyors can both be vectors for new infestations as they move from an infected stream to a healthy stream because the mussel is spread as the free-swimming veliger (juvenile) life stage. 3 Quagga Mussel (Dreissena bugensis) D. rostriformis bugensis is a bivalve mollusc originating from the estuaries of the Dnieper and Southern Bug rivers, both flowing into the Caspian Sea. In the mid-1980s, D. rostriformis bugensis was introduced into North America, presumably through discharge of ballast water from transoceanic ships. In 2007, a population was discovered in Lake Mead, a reservoir of the Colorado River. The quagga mussel is a sessile filter-feeder that is capable of reaching extremely high densities. Due to their ability to colonize hard surfaces, these mussels become a major fouling problem, clogging water-intake pipes and water filtration systems. They easily attach to canal locks, docks, buoys, hulls of the commercial and 2 to 4 cm recreational vessels. There are no native look-alikes, and their larger size shell has red to brown markings. 4 Large brown Spot on carapace Rusty Crayfish (Orconectes rusticus) This invasive crayfish are native to the Eastern United states. They have the potential to change food chain dynamics by out competing other detritivores and scavengers. Both pools and riffles provide this invader with habitat. Red Swamp Crayfish (Procambarus clarkia) This potential invader is native to the coastal plains of the Gulf Coast, from Mexico to Florida, and as far north as Illinois in the Mississippi River drainage. The red swamp aggressively competes with native crayfish and other aquatic species for habitat and forage. This species can act as a host for parasites and diseases. It is known by the black rectangular patches on the dorsal abdominal segments and the red knobs on the claws. Red knobs Black saddles or patches 5 Ringed Crayfish (Orconectes neglectus) This species is native to the central plains and Ozark regions, in the Mississippi River drainage. Introduced populations have been found in New York, as well as the John Day River and Umpqua River, in Oregon. This species prefers fast water and gravel/cobble streams. The impacts of this invader are unknown, but scientists expect that competition with native crayfish and other aquatic species for habitat and forage is possible. It can grow to 9 cm in length and is identified by the distinct black markings on its carapace, abdomen and claws. Even small individuals exhibit the identifying features (see photo at right). Blotches on segments Northern crayfish (Orconectes propinquus) This species is native to central Canada and U.S. Introduced to parts of the Southwest, Southeast and Mid-Atlantic regions. The Northern Crayfish is a short-lived species (~2 yrs) with a high reproductive rate. Competition and displacement of native crayfish has occurred where this species is introduced. Burrowing can cause bank erosion, or It is identified by green claws with yellow tips damage irrigation structures. and paired, tan / brown blotches on each abdominal segment. 6 DON’T BE CONFUSED BY OUR NATIVE LOOK-A-LIKE! Signal Crayfish (Pacifastacus leniusculus) Our native crayfish is common to many streams in the Pacific Northwest. They can be identified by the smooth texture of their claws lacking noticeable bumps. The native crayfish’s claws are also more robust (wider) than their invading cousins. Smooth claws, lacking bumps Chinese Mitten Crab (Eriocheir sinensis) Native to China and Korea along the Yellow Sea , this species is found throughout the San Francisco Bay watershed and has migrated as far inland as the Sierra Nevada foothills of Ca lifornia. Range expansion along the West ast Cois expected. Th e Chinese mitten crab is a burrowing crab tha t has a catadromous lifecycle, breeding in bra ckish water, but living as adults in fresh wa ter. This means it spends the majority of its life in freshwater reaches of coastal watersheds, but reproduces and develops in brackish est uaries. The width of its shell ranges in size from 4 to 8 4 to 8 cm cm. It is known for the furry “mittens” that cover all but the tips of their claws. 7 Chinese Mystery Snail (Cipangopaludina chinensis) Relatively widespread in waters that join the Great Lakes and the Northeastern Seaboard, this invader has been discovered living in the lower Columbia, Snake, Willamette, and Puget Sound drainages. The Chinese mystery snail is identified by their relatively large, globose (round) shells. Their operculum (the flap covering the opening used for feeding and excreting) has concentric markings. Cipangopaludina chinensis has a width that is often 75% of its length. Total length can reach 65 mm (~2.5 inches). An adult will usually have 6 to 7 complete whorls. The lighter coloration of juveniles transforms to an Preferred habitat is silty bottoms, although the olive green, greenish brown, brown or reddish species can range well upstream of silt- brown pigmentation as an adult. dominant stream reaches. C. chinensis uses its tongue-like radula to scrape and ingest organic and inorganic bottom Four complete material. Common diatoms are probably the whorls in this most nutritious food it consumes. Its effects on snail native NW ecosystems have yet to be determined. Mystery snails can host parasites and diseases that are known to infect humans. Concentric rings visible on the operculum 8 Asian Clam Corbicula fluminea The Asian clam was first introduced to the United States from China in the 1920s, either as a food for Chinese immigrants or with the Giant Pacific Oyster importation. They were first established in California in 1938, then moved rapidly through irrigation canals and now continue to spread across the United States. These small freshwater mussels can be drawn into power plants along with coolant water and clog tubes and pipes, resulting in economic costs. The Asian clam will also compete with native clams and mussels for habitat and food, and change benthic substrates. Lake Tahoe. This nutrient-poor habitat may serve as a good template for PNW streams In the Pacific Northwest, the species is likely to and lakes. spread as long as it can endure the cold temperatures. Infested waters can be treated by hand (or with chemicals in closed environments like power plants).
Load more

Recommended publications
  • Revisiting Big-Ear Radix Snails on the Kenai Peninsula by Matt Bowser
    Refuge Notebook • Vol. 19, No. 37 • September 15, 2017 Revisiting big-ear radix snails on the Kenai Peninsula by Matt Bowser Genetic relationships among selected big-ear radix snails collected in several geographic regions. Longer branch lengths correspond to more differences among barcode sequences, measured in expected changes per amino acidsite. “Sometimes one thing leads to another.” This is Alaska, he doubted that it had been introduced. a quote from a Refuge Notebook article I had writ- We dug into this question of whether or not the ten about the Kenai Peninsula’s first exotic freshwa- big-ear radix is exotic to our area. A literature search ter snail, the big-ear radix (Radix auricularia), last Jan- and expert opinion supported my first conclusion: the uary. I had been referring to the past, but more was to current understanding was that all populations of this come. Soon after the article appeared in the Clarion I snail currently in North America were the result of in- was contacted by retired geologist Dr. Dick Reger, who troduction from Europe. disagreed with statements in my article. He thought The history of Radix auricularia in North Amer- that this snail might be native. ica goes back to before 1869 when it was found near As a geologist, Dick had studied freshwater snails Troy, New York, apparently introduced with plants and clams in old sediments in our area to determine from Europe. By the early 1900s it had spread to multi- past conditions. He had also collected and identified ple locations in the Great Lakes.
    [Show full text]
  • An Annotated Draft Genome for Radix Auricularia (Gastropoda, Mollusca)
    View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Plymouth ElectronicGBE Archive and Research Library An Annotated Draft Genome for Radix auricularia (Gastropoda, Mollusca) Tilman Schell1,2,*, Barbara Feldmeyer2, Hanno Schmidt2, Bastian Greshake3, Oliver Tills4, Manuela Truebano4, Simon D. Rundle4, Juraj Paule5, Ingo Ebersberger2,3, and Markus Pfenninger1,2 1Molecular Ecology Group, Institute for Ecology, Evolution and Diversity, Goethe-University, Frankfurt am Main, Germany 2Adaptation and Climate, Senckenberg Biodiversity and Climate Research Centre, Frankfurt am Main, Germany 3Department for Applied Bioinformatics, Institute for Cell Biology and Neuroscience Goethe-University, Frankfurt am Main, Germany 4Marine Biology and Ecology Research Centre, Marine Institute, School of Marine Science and Engineering, Plymouth University, United Kingdom 5Department of Botany and Molecular Evolution, Senckenberg Research Institute, Frankfurt am Main, Germany *Corresponding author: E-mail: [email protected]. Accepted: February 14, 2017 Data deposition: This project has been deposited at NCBI under the accession PRJNA350764. Abstract Molluscs are the second most species-rich phylum in the animal kingdom, yet only 11 genomes of this group have been published so far. Here, we present the draft genome sequence of the pulmonate freshwater snail Radix auricularia. Six whole genome shotgun libraries with different layouts were sequenced. The resulting assembly comprises 4,823 scaffolds with a cumulative length of 910 Mb and an overall read coverage of 72Â. The assembly contains 94.6% of a metazoan core gene collection, indicating an almost complete coverage of the coding fraction. The discrepancy of ~ 690 Mb compared with the estimated genome size of R.
    [Show full text]
  • Molecular Characterization of Liver Fluke Intermediate Host Lymnaeids
    Veterinary Parasitology: Regional Studies and Reports 17 (2019) 100318 Contents lists available at ScienceDirect Veterinary Parasitology: Regional Studies and Reports journal homepage: www.elsevier.com/locate/vprsr Original Article Molecular characterization of liver fluke intermediate host lymnaeids (Gastropoda: Pulmonata) snails from selected regions of Okavango Delta of T Botswana, KwaZulu-Natal and Mpumalanga provinces of South Africa ⁎ Mokgadi P. Malatji , Jennifer Lamb, Samson Mukaratirwa School of Life Sciences, College of Agriculture, Engineering and Science, University of KwaZulu-Natal, Westville Campus, Durban 4001, South Africa ARTICLE INFO ABSTRACT Keywords: Lymnaeidae snail species are known to be intermediate hosts of human and livestock helminths parasites, Lymnaeidae especially Fasciola species. Identification of these species and their geographical distribution is important to ITS-2 better understand the epidemiology of the disease. Significant diversity has been observed in the shell mor- Okavango delta (OKD) phology of snails from the Lymnaeidae family and the systematics within this family is still unclear, especially KwaZulu-Natal (KZN) province when the anatomical traits among various species have been found to be homogeneous. Although there are Mpumalanga province records of lymnaeid species of southern Africa based on shell morphology and controversial anatomical traits, there is paucity of information on the molecular identification and phylogenetic relationships of the different taxa. Therefore, this study aimed at identifying populations of Lymnaeidae snails from selected sites of the Okavango Delta (OKD) in Botswana, and sites located in the KwaZulu-Natal (KZN) and Mpumalanga (MP) provinces of South Africa using molecular techniques. Lymnaeidae snails were collected from 8 locations from the Okavango delta in Botswana, 9 from KZN and one from MP provinces and were identified based on phy- logenetic analysis of the internal transcribed spacer (ITS-2).
    [Show full text]
  • The Frog in Taffeta Pants
    Evolutionary Anthropology 13:5–10 (2004) CROTCHETS & QUIDDITIES The Frog in Taffeta Pants KENNETH WEISS What is the magic that makes dead flesh fly? himself gave up on the preformation view). These various intuitions arise natu- Where does a new life come from? manded explanation. There was no rally, if sometimes fancifully. The nat- Before there were microscopes, and compelling reason to think that what uralist Henry Bates observed that the before the cell theory, this was not a one needed to find was too small to natives in the village of Aveyros, up trivial question. Centuries of answers see. Aristotle hypothesized epigenesis, the Tapajos tributary to the Amazon, were pure guesswork by today’s stan- a kind of spontaneous generation of believed the fire ants, that plagued dards, but they had deep implications life from the required materials (pro- them horribly, sprang up from the for the understanding of life. The vided in the egg), that systematic ob- blood of slaughtered victims of the re- 5 phrase spontaneous generation has servation suggested coalesced into a bellion of 1835–1836 in Brazil. In gone out of our vocabulary except as chick. Such notions persisted for cen- fact, Greek mythology is full of beings an historical relic, reflecting a total turies into what we will see was the spontaneously arising—snakes from success of two centuries of biological critical 17th century, when the follow- Medusa’s blood, Aphrodite from sea- research.1 The realization that a new ing alchemist’s recipe was offered for foam, and others. Even when the organism is always generated from the production of mice:3,4 mix sweaty truth is known, we can be similarly one or more cells shed by parents ex- underwear and wheat husks; store in impressed with the phenomena of plained how something could arise open-mouthed jar for 21 days; the generation.
    [Show full text]
  • Gastropoda, Mollusca)
    bioRxiv preprint doi: https://doi.org/10.1101/087254; this version posted November 11, 2016. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY-NC-ND 4.0 International license. An annotated draft genome for Radix auricularia (Gastropoda, Mollusca) Tilman Schell 1,2 *, Barbara Feldmeyer 2, Hanno Schmidt 2, Bastian Greshake 3, Oliver Tills 4, Manuela Truebano 4, Simon D. Rundle 4, Juraj Paule 5, Ingo Ebersberger 3,2, Markus Pfenninger 1,2 1 Molecular Ecology Group, Institute for Ecology, Evolution and Diversity, Goethe-University, Frankfurt am Main, Germany 2 Adaptation and Climate, Senckenberg Biodiversity and Climate Research Centre, Frankfurt am Main, Germany 3 Department for Applied Bioinformatics, Institute for Cell Biology and Neuroscience, Goethe- University, Frankfurt am Main, Germany 4 Marine Biology and Ecology Research Centre, Marine Institute, School of Marine Science and Engineering, Plymouth University, Plymouth, United Kingdom 5 Department of Botany and Molecular Evolution, Senckenberg Research Institute, Frankfurt am Main, Germany * Author for Correspondence: Senckenberg Biodiversity and Climate Research Centre, Senckenberganlage 25, 60325 Frankfurt am Main, Germany. Tel.: +49 (0)69 75 42 18 30, E-mail: [email protected] Data deposition: BioProject: PRJNA350764, SRA: SRP092167 1 bioRxiv preprint doi: https://doi.org/10.1101/087254; this version posted November 11, 2016. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity.
    [Show full text]
  • Learning in the Land Snail (Helix Aspers a Mliller)*
    Bulletin of the Psychonomic Society 1974, Vol. 4 (SA), 476-478 Learning in the land snail (Helix aspers a Mliller)* R. K. SIEGEL and M. E. JARVIK Departments of Pharmacology and Psychiatry, University of California, Los Angeles Los Angeles, California 90024 A group of two experiments are discussed which demonstrate avoidance learning in land snails. Experiment I utilized the snail's negative geotaxis and its chemoreceptive characteristics and required the snail to climb a vertical pole which contained a quinine-saturated loop of thread at the top. Experiment II substituted electric shock loops for the quinine. Snails in both experimental groups manifested progressively increasing climbing latencies and avoidance responses throughout five successive training sessions and a one week retention test. Control animals which received noncontingent quinine or shock did not show evidence of learning. These results provide evidence of rapid avoidance learning in gastropod mollusks. Very few investigators have examined the problem of employed a pole-climbing response with quinine as an learning in snails (see reviews by Stephens & McGaugh, aversive stimulus at the top of the pole. These authors 1972; Willows, 1973). Early workers have suggested that demonstrated both short- and long-term memory of the these gastropods show evidence of classical conditioning aversive experience as well as habituation of the climbing (Thompson, 1917), maze learning (Garth & Mitchell, response itself with a neutral water stimulus. This 1926; Fischel, 1931), and habituation (Humphrey, learning appeared to be modifiable by length of 1930; Grindley, 1937). The phenomenon of classical laboratory housing, humidity, nutrition, and conditioning in snails has been recently reexamined by reproductive conditions.
    [Show full text]
  • Aquatic Snails of the Snake and Green River Basins of Wyoming
    Aquatic snails of the Snake and Green River Basins of Wyoming Lusha Tronstad Invertebrate Zoologist Wyoming Natural Diversity Database University of Wyoming 307-766-3115 [email protected] Mark Andersen Information Systems and Services Coordinator Wyoming Natural Diversity Database University of Wyoming 307-766-3036 [email protected] Suggested citation: Tronstad, L.M. and M. D. Andersen. 2018. Aquatic snails of the Snake and Green River Basins of Wyoming. Report prepared by the Wyoming Natural Diversity Database for the Wyoming Fish and Wildlife Department. 1 Abstract Freshwater snails are a diverse group of mollusks that live in a variety of aquatic ecosystems. Many snail species are of conservation concern around the globe. About 37-39 species of aquatic snails likely live in Wyoming. The current study surveyed the Snake and Green River basins in Wyoming and identified 22 species and possibly discovered a new operculate snail. We surveyed streams, wetlands, lakes and springs throughout the basins at randomly selected locations. We measured habitat characteristics and basic water quality at each site. Snails were usually most abundant in ecosystems with higher standing stocks of algae, on solid substrate (e.g., wood or aquatic vegetation) and in habitats with slower water velocity (e.g., backwater and margins of streams). We created an aquatic snail key for identifying species in Wyoming. The key is a work in progress that will be continually updated to reflect changes in taxonomy and new knowledge. We hope the snail key will be used throughout the state to unify snail identification and create better data on Wyoming snails.
    [Show full text]
  • Photoperiod and Temperature Interaction in the Helix Pomatia
    Photoperiod and temperature interaction in the determination of reproduction of the edible snail, Helix pomatia Annette Gomot Laboratoire de Zoologie et Embryologie, UA CNRS 687, Faculté des Sciences et Techniques et Centre Universitaire d'Héliciculture, Université de Franche-Comté, 25030 Besançon Cedex, France Summary. Snails were kept in self-cleaning housing chambers in an artificially con- trolled environment. Mating was frequent under long days (18 h light) and rare under short days (8 h light) regardless of whether the snails were kept at 15\s=deg\Cor 20\s=deg\C.An interaction between photoperiod and temperature was observed for egg laying. The number of eggs laid (45\p=n-\50/snail)and the frequency of egg laying (90\p=n-\130%)were greater in long than in short days (16\p=n-\35/snailand 27\p=n-\77%)but a temperature of 20\s=deg\C redressed, to some extent, the inhibitory effect of short days. At both temperatures only long photoperiods brought about cyclic reproduction over a period of 16 weeks, con- firming the synchronizing role of photoperiod on the neuroendocrine control of egg laying in this species of snail. Keywords: edible snail; mating; egg laying; photoperiod; temperature Introduction The effects of photoperiod and temperature, which influence most reproductive cycles of animals of temperate regions, have given rise to a certain number of observations for pulmonate gastropods. In basommatophorans, the influence of photoperiod and temperature on reproduction has been shown in four species of lymnaeids and planorbids (Imhof, 1973), in Melampus (Price, 1979), in Lymnaea stagnalis (Bohlken & Joosse, 1982; Dogterom et ai, 1984; Joosse, 1984) and in Bulinus truncatus (Bayomy & Joosse, 1987).
    [Show full text]
  • Stream Inventory Handbook: Level 1 and Level II
    Stream Inventory Handbook: Level 1 and Level II CONTENTS CHAPTER 1 Introduction/Overview ............................................................................................................ 3 Background ......................................................................................................................................... 3 Inventory Attributes ............................................................................................................................ 4 Establishing Forest Priorities .............................................................................................................. 5 Stream Inventory Program Management ............................................................................................ 5 Program Administration And Quality Control .................................................................................... 6 A Standard Protocol ............................................................................................................................ 7 Presentation of Information ................................................................................................................. 8 Handbook Content .............................................................................................................................. 9 CHAPTER 2 Office Procedures Level I Inventory - Identification Level .................................................. 12 Objectives .........................................................................................................................................
    [Show full text]
  • Stimulation of Genital Eversion in the Land Snail Helix Aspersa by Extracts of the Glands of the Dart Apparatus DANIEL J.D
    THE JOURNAL OF EXPERIMENTAL ZOOLOGY 238:129-139 (1986) Stimulation of Genital Eversion in the Land Snail Helix aspersa by Extracts of the Glands of the Dart Apparatus DANIEL J.D. CHUNG Division of Biological Sciences, and Museum of Zoology, University of Michigan, Ann Arbor, MI 48109 ABSTRACT The dart apparatus, used during courtship in some groups of hermaphroditic land snails, has long been assumed to have a “stimulatory” effect on the mating partner, though how stimulation occurs and exactly what function it serves has never been determined. In this study, extracts of the mucous glands of the dart apparatus of the land snail Helix aspersa were injected into conspecifics and into a related snail, Cepaea nemoralis, in order to test the hypothesis that the dart is used to achieve inflow of bioactive mucous gland secretions into the darted snail. Helix aspersa injected with the extract responded by everting their terminal genitals; eversion normally takes place during courtship and mating. Boiling the extract increased the bioactiv- ity. Pronase-treated extract lost bioactivity, and gel filtration of the boiled extract indicated that the active substance has a molecular weight of about 5,000. The active substance may be a polypeptide. Cepaea nemoralis also everted their genitals when injected with the boiled Helix extract. The active substance appears to be a contact sex pheromone, the second such pheromone in a pulmonate land snail for which experimental evidence has been obtained. Accessory organs in the terminal genitalia dart might cause increased tonus of the pen- of the hermaphroditic land snail order Sty- ial muscles.
    [Show full text]
  • Aquatic Macrophytes As Microhabitats of Radix Auricularia (Gastropoda: Pulmonata): a Case Study from Southeast Bulgaria
    ECOLOGIA BALKANICA 2009, Vol. 1 November 2009 pp. 91-94 Aquatic macrophytes as microhabitats of Radix auricularia (Gastropoda: Pulmonata): A case study from Southeast Bulgaria Stanislava Y. Vasileva*, Dilian G. Georgiev**, Gana M. Gecheva*** University of Plovdiv, Faculty of Biology, Department of Ecology and Environmental Conservation, 24, Tzar Assen Str., 4000 Plovdiv, BULGARIA E-mail: *[email protected], **[email protected], *** [email protected] Abstract. The aim of the current study is to investigate the abundance of the freshwater pulmonate snail Radix auricularia among different aquatic plants communities, with the view of understanding if there is any particular habitat preference, comparing two freshwater basins having similar environmental conditions. The freshwater plant species were collected by net from two ponds at the end of May 2009 - 650 g wet plant mass, micro dam at Chernoochene Village, East Rhodopes Mts.; 138 g wet plant mass, small flood pond near the Maritza River, Plovdiv City, Upper Thracian Lowland. The plant mass was weighted in the laboratory after the alive snails were collected from the plant surface. Totally three species of freshwater plants were inhabited by R. auricularia , but its abundance and possible preference was highest on the Rigid Hornworth (Ceratophyllum demersum ). Key words: Radix auricularia , freshwater, macrophytes, habitats, ponds, South Bulgaria. Introduction very important role in aquatic habitats for Aquatic macrophytes are well known as the natural vitality of the epiphytic preferred shelter and feeding sites of the malacofauna. freshwater snails (ZHADIN , 1952). Even though the Bulgarian freshwater Submerged macrophyte biomass is shown mollusk fauna is relatively well studied in to be the key factor affecting species’ zoological aspect (ANGELOV , 2000) the number, density, and biomass of ecology of the aquatic snails remains still gastropods in standing waters (WANG et al ., poorly known (HUBENOV , 2005).
    [Show full text]
  • Interrelations Des Analyses Malacologiques En Contextes Archéologiques Et Actuels En Plaine D’Alsace
    naturae 2020 9 COLLOQUE NATIONAL DE MALACOLOGIE CONTINENTALE, NANTES, 6 ET 7 DÉCEMBRE 2018 Édité par Lilian LÉONARD Interrelations des analyses malacologiques en contextes archéologiques et actuels en plaine d’Alsace Salomé Granai art. 2020 (9) — Publié le 7 octobre 2020 www.revue-naturae.fr DIRECTEUR DE LA PUBLICATION / PUBLICATION DIRECTOR : Bruno David, Président du Muséum national d’Histoire naturelle RÉDACTEUR EN CHEF / EDITOR-IN-CHIEF : Jean-Philippe Siblet ASSISTANTE DE RÉDACTION / ASSISTANT EDITOR : Sarah Figuet ([email protected]) MISE EN PAGE / PAGE LAYOUT : Sarah Figuet COMITÉ SCIENTIFIQUE / SCIENTIFIC BOARD : Luc Abbadie (UPMC, Paris) Luc Barbier (Parc naturel régional des caps et marais d’Opale, Colembert) Aurélien Besnard (CEFE, Montpellier) Vincent Boullet (Expert indépendant flore/végétation, Frugières-le-Pin) Hervé Brustel (École d’ingénieurs de Purpan, Toulouse) Patrick De Wever (MNHN, Paris) Thierry Dutoit (UMR CNRS IMBE, Avignon) Éric Feunteun (MNHN, Dinard) Romain Garrouste (MNHN, Paris) Grégoire Gautier (DRAAF Occitanie, Toulouse) Olivier Gilg (Réserves naturelles de France, Dijon) Frédéric Gosselin (Irstea, Nogent-sur-Vernisson) Patrick Haffner (UMS PatriNat, Paris) Frédéric Hendoux (MNHN, Paris) Xavier Houard (OPIE, Guyancourt) Isabelle Leviol (MNHN, Concarneau) Francis Meunier (Conservatoire d’espaces naturels – Hauts-de-France, Amiens) Serge Muller (MNHN, Paris) Francis Olivereau (DREAL Centre, Orléans) Laurent Poncet (UMS PatriNat, Paris) Nicolas Poulet (AFB, Vincennes) Jean-Philippe Siblet (UMS PatriNat, Paris)
    [Show full text]