DOCSLIB.ORG

Holomuzki.Pdf (346.7Kb)

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Holomuzki.Pdf (346.7Kb) Available online at www.nznaturalsciences.org.nz Same enemy, same response: predator avoidance by an invasive and native snail Joseph R. Holomuzki1,3 & Barry J. F. Biggs2 1Department of Evolution, Ecology, and Organismal Biology, The Ohio State University, Mansfield, Ohio, U.S.A. 2National Institute of Water and Atmospheric Research Limited, Christch- urch, New Zealand 3Corresponding author’s email: [email protected] (Received 21 December 2011, revised and accepted 25 April 2012) Abstract Novel or highly effective antipredator traits can facilitate successful invasions by prey species. Previous studies have documented that both the native New Zealand snail, Potamopyrgus antipodarum, and the highly successful, worldwide invader Physella (Physa) acuta, seek benthic cover to avoid fish predators. We asked whether an invasive, South Island population of Physella has maintained this avoidance response, and if so, how it compared to that of Potamopyrgus that has coevolved with native fish. We compared patterns of sediment surface and subsurface use between snail species and between sizes of conspecifics both in a 2nd –order reach with predatory fish and in a laboratory experiment where fish presence (common bullies [Gobiomorphus cotidianus]) was manipulated. Both snails sought protective sediment subsurfaces when with bullies. Proportionally, sediment subsurface use both in field collections and in fish treatments in the experiment were similar between species. Field-captured bullies ate more Physella than Potamoprygus, suggesting different consumptive risks, but overall, few snails were consumed. Instream densities and sizes (shell length) of Physella were greatest on cobbles, where most (>90%) egg masses were found. Potamopyrgus densities were evenly distributed across sand, gravel, and cobbles. Shell lengths were similar between snails on sediment subsurfaces and surfaces during daylight for both species, suggesting this avoidance response was not size-dependent. For Physella, retaining the ability to seek benthic refugia when exposed to novel predators likely greatly contributes to its invasion success. Given both snails are dominant primary consumers in many freshwater ecosystems, surface-density increases resulting from predation pressure decreases would predictably significantly affect system trophic dynamics. Key words: bully predation – Physella acuta – Potamopyrgus antipodarum – sediment surface and subsurface use – shell length – sediment size New Zealand Natural Sciences (2012) 37: 11-24. © New Zealand Natural Sciences 12 New Zealand Natural Sciences 37 (2012) Introduction hence displace other macroinvertebrates and fish (Lowe & Hunter 1988; Win- Novel or highly effective antipredator terbourn & Fegley 1989; Biggs & Lowe traits can facilitate successful invasions 1994). In New Zealand, their popula- by prey species. Traits that allow benthic tions seldom reach high densities, in part macroinvertebrate invaders to effectively because of predation by native and non- deter or avoid native predators, and hence native fishes (Levri 1998; Holomuzki & to become successful, include armouring Biggs 2006; Holomuzki 2010). (spines) (Zaranko et al. 1997; Levri et Predation risk might be a key driver al. 2007), inedibility (Strayer 2009), of microspatial patterns of both snails. activity reductions (Pennuto & Keppler Potamopyrgus generally resides on a 2008), and movement to spatial refugia broad range of sediment sizes (Jowett et (Dalesman et al. 2007). Identifying and al. 1991), but in streams, is most dense assessing the relative effectiveness of on cobbles in slow current speeds (≤ antipredator traits of native and non- 15 cm/s) (Holomuzki & Biggs 2007). native prey is important to predicting Regardless of sediment size, in streams the potential rate and geographical extent with predatory fish, ~80% of all Pota- of invader spread and impacts on native mopyrgus occur in sediment subsurfaces species numbers and assemblages (Levine with limited predator access (Holomuzki et al. 2003; Temperton et al. 2004). et al. 2009). Moreover, Potamopyrgus This study compares predator avoid- will move to protective sediment sub- ance behaviours by a native and non- surfaces when in the presence of mol- native snail. Potamopyrgus antipodarum luscivorous bullies (Gobiomorphus spp.), (Gray 1843) is native to New Zealand a widespread native fish in New Zealand streams and lakes, where it commonly streams and lakes (Holomuzki & Biggs co-exists with the highly successful, 2006). Similarly, Physella acuta will worldwide invader Physella (Physa) acuta move under cover when in the physical (Draparanaud 1805) (McCarter 1986; or chemical presence of pumpkinseed Cope & Winterbourn 2004; Kristensen sunfish (Lepomis gibbosus) (Turner 1996; & Closs 2008), apparently introduced Turner & Montgomery 2003) and creek from the Mediterranean region of Europe chub (Semotilus atromaculatus) (Turner or North America ca. 40 years ago (Win- et al. 2000), important molluscivores in terbourn 1973). Potamopyrgus is now also eastern North America (Brönmark et al. found in southeastern Australia (Sch- 1992). However, for invasive populations reiber et al. 1998; 2003), Japan (Shimada in New Zealand, it is unclear whether & Urabe 2003), Europe (Statzner 1981), Physella has retained this response, and the Laurentian Great Lakes (Zaranko et how this response, if retained, compares al. 1997), and the western United States to predator-induced microspatial shifts (Dybdahl & Kane 2005). So, both snails by Potamopyrgus that has coevolved with also widely co-occur as non-native spe- native predators. cies. When at high densities or biomass, The magnitude of any avoidance re- grazing by both snails can significantly sponse might also depend on predation reduce algal biomass and richness, alter risk and prey vulnerability. Bullies eat algal physiognomy and composition, and both Physella and Potamopyrgus (Sagar Holomuzki & Biggs: Predator avoidance by invasive and native snails 13 & Glova 1995; Wilhelm et al. 2007), snail size distributions. but it is unknown whether consumptive risk from bullies differs between these Methods snails. Non-native, young brown trout (Salmo trutta) in New Zealand streams Snail and sediment field sampling apparently eat similar numbers of Pota- mopyrgus and Physella (Holomuzki 2010), Snails were sampled in the East Branch of even though Physella is larger-bodied the Kaiapoi River (a.k.a. Silverstream; lat (~7 mm average length), softer-shelled, 43.25°S, long 172.35°E) 26 km north of and energetically more profitable than Christchurch on 1 and 2 February 2011. Potamopyrgus (4–6 mm average length) Snails were collected in a ~25-m-long, (McCarter 1986). Moreover, in North ~11-m-wide reach (current velocity: America, Physa integra (= P. acuta, Dillon 5–16 cm/s; water depths: 12–31 cm) et al. 2002) are smaller at sites with fish containing mainly coarse gravel to small than without fish (Bernot & Whittinghill cobbles armouring sand. Macrophytes, 2003), but it is unclear if snails are smaller mostly watercress (Nasturtium officinale), because of size-selective predation or be- were present only along shorelines. The cause larger snails exhibit stronger avoid- predominant fishes in this 2nd-order ance behaviours that reduce predation reach were common bullies, short-finned risk than smaller ones. For Potamopyrgus, eels (Anguilla australis), and brown trout small, non-parasitized individuals (<3.8 (Holomuzki & Biggs, 2006). Indigenous mm length) are more active than large Paranephrops zealandicus crayfish were individuals on tops of rocks during day- absent (JRH, pers. obs.). light (Levri & Lively 1996), suggesting The reach was mapped to create a grid predation risk might vary with body size. system for sampling snails and sediments. Here, we present results from field The grid contained 2 rows, each 1-m wide collections, gut-evacuation observations, and 5 m-long near mid-channel, and and a laboratory experiment to examine spaced 1-m apart. Each row was divided 1) how densities of each snail vary with into twenty 0.5 x 0.5 m plots. Plots were sediment size, 2) how patterns of sedi- used to collect snails and sediments, and ment subsurface use differ between Phy- the 1-m wide space between the rows sella and Potamopyrgus and between sizes in the middle of the reach served as a of conspecifics when with predatory fish, walkway to minimize disturbance in and 3) whether these snails are equally sample plots. Twenty one of the 40 plots important prey items for common bul- within the grid were randomly selected lies (Gobiomorphus cotidianus McDow- for sampling with a cylindrical stovepipe all). Microdistributional patterns of P. core sampler (40 cm height, 25.4 cm di- acuta in streams are unknown, but clearly ameter). The sampler was pushed ~5 to 15 important to understanding trophic cm into sediments and all snails and sedi- relationships. We also relate egg mass dis- ments within the sampler were collected. tributions to sediment sizes for Physella, However, collection procedure varied but not for ovoviviparous Potamopyrgus, with water depth at plots. In depths <25 because egg-laying habitat preferences cm, all epibenthic snails in the sampler might affect sediment use patterns and were removed by suctioning, then sedi- 14 New Zealand Natural Sciences 37 (2012) ments were removed with a dip net (0.5 x 10 in the laboratory between north- and 0.5-mm mesh) to a depth of ~5 to 15 cm. west-facing windows to expose fish to a In depths from ~25 to 31 cm, epibenthic natural
Load more

Recommended publications
  • The New Zealand Mud Snail Potamopyrgus Antipodarum (J.E
    BioInvasions Records (2019) Volume 8, Issue 2: 287–300 CORRECTED PROOF Research Article The New Zealand mud snail Potamopyrgus antipodarum (J.E. Gray, 1853) (Tateidae, Mollusca) in the Iberian Peninsula: temporal patterns of distribution Álvaro Alonso1,*, Pilar Castro-Díez1, Asunción Saldaña-López1 and Belinda Gallardo2 1Departamento de Ciencias de la Vida, Unidad Docente de Ecología, Facultad de Ciencias, Universidad de Alcalá, 28805 Alcalá de Henares, Madrid, Spain 2Department of Biodiversity and Restoration. Pyrenean Institute of Ecology (IPE-CSIC). Avda. Montaña 1005, 50059, Zaragoza, Spain Author e-mails: [email protected] (ÁA), [email protected] (PCD), [email protected] (ASL), [email protected] (BG) *Corresponding author Citation: Alonso Á, Castro-Díez P, Saldaña-López A, Gallardo B (2019) The Abstract New Zealand mud snail Potamopyrgus antipodarum (J.E. Gray, 1853) (Tateidae, Invasive exotic species (IES) are one of the most important threats to aquatic Mollusca) in the Iberian Peninsula: ecosystems. To ensure the effective management of these species, a comprehensive temporal patterns of distribution. and thorough knowledge on the current species distribution is necessary. One of BioInvasions Records 8(2): 287–300, those species is the New Zealand mudsnail (NZMS), Potamopyrgus antipodarum https://doi.org/10.3391/bir.2019.8.2.11 (J.E. Gray, 1853) (Tateidae, Mollusca), which is invasive in many parts of the Received: 7 September 2018 world. The current knowledge on the NZMS distribution in the Iberian Peninsula is Accepted: 4 February 2019 limited to presence/absence information per province, with poor information at the Published: 29 April 2019 watershed scale. The present study aims to: 1) update the distribution of NZMS in Handling editor: Elena Tricarico the Iberian Peninsula, 2) describe its temporal changes, 3) identify the invaded habitats, Thematic editor: David Wong and 4) assess the relation between its abundance and the biological quality of fluvial systems.
    [Show full text]
  • Tolerance of the Invasive New Zealand Mud Snail to Various Decontamination Procedures Christopher N
    Lawrence University Lux Lawrence University Honors Projects Spring 6-3-2015 Tolerance of the Invasive New Zealand Mud Snail To Various Decontamination Procedures Christopher N. Acy Lawrence University, [email protected] Follow this and additional works at: https://lux.lawrence.edu/luhp Part of the Aquaculture and Fisheries Commons, Environmental Education Commons, and the Terrestrial and Aquatic Ecology Commons © Copyright is owned by the author of this document. Recommended Citation Acy, Christopher N., "Tolerance of the Invasive New Zealand Mud Snail To Various Decontamination Procedures" (2015). Lawrence University Honors Projects. 76. https://lux.lawrence.edu/luhp/76 This Honors Project is brought to you for free and open access by Lux. It has been accepted for inclusion in Lawrence University Honors Projects by an authorized administrator of Lux. For more information, please contact [email protected]. Tolerance of the Invasive New Zealand Mud Snail To Various Decontamination Procedures Christopher Norris Acy A Thesis Submitted in Candidacy for Honors at Graduation from Lawrence University May 2015 Acknowledgements I would like to thank my advisor on this project, Dr. Bart De Stasio. His insight and tutoring in the scientific writing process and data interpretation were invaluable. Zoe Psarouthakis was essential as a partner and lab mate as this project would not have been possible without her help. Her aid in scientific ideas and in the running of these experiments is very much appreciated. Both Dr. Beth De Stasio and Katherine Barie provided thoughts and suggestions on the introduction that greatly improved the overall quality of the section. i Table of Contents Abstract ....................................................................................................................................................
    [Show full text]
  • New Zealand Mudsnail
    SPECIES AT A GLANCE New Zealand Mudsnail New Zealand mudsnails are a highly invasive spe- cies of freshwater mollusk of the family Hydrobiidae, also known as spring snails. While some species in the family Hydrobiidae are sensitive to water quality and environment, New Zealand mudsnails are tolerant of a wide variety of habitats. Because of their ability to clone themselves and maintain high reproductive rates, these animals have rapidly spread throughout the western United States. Some estimates indicate that one female can clone and produce over 312,500,000 offspring in one year. It takes only one aquatic hitchhiker to start an invasion! REPORT THIS SPECIES! Oregon: 1-866-INVADER or Oregon InvasivesHotline.org; Washington: 1-888-WDFW-AIS; California: 1-916- 651-8797 or email [email protected]; Other states: 1-877-STOP-ANS. Jane and Michael Liu, Oregon Sea Jane and MichaelGrant Oregon Liu, Species in the news Learning extensions Resources Ecology graduate student Val Bren- On the Trail of the Snail Distribution information: neis studies the effect of invasive http://rivrlab.msi.ucsb.edu/NZMS/ New Zealand mudsnails in Youngs index.php Bay, near Astoria, Oregon. Why you should care ery operations. They spread into relatively pristine People provide pathways for spreading New areas, such as Yellowstone National Park. New Zea- Zealand mudsnails. Mudsnails can dramatically land mudsnails have been shown to spread indepen- impact the bottom of the food chain by dominating dently upstream through locomotion. They are spread primary consumption in aquatic communities they through contaminated recreational equipment (boots invade. Through sheer numbers, their dense popula- and waders, lifejackets, kayaks, etc.), birds, and the tions outcompete native invertebrates for periphyton digestive tracts of fish.
    [Show full text]
  • Predator Detection and a Possible Dispersal Behavior of the Invasive New Zealand Mud Snail, Potamopyrgus Antipodarum (Gray, 1843)
    Aquatic Invasions (2019) Volume 14, Issue 3: 417–432 Special Issue: Behaviour in Aquatic Invasions Guest editors: Kit Magellan, Amy Deacon, Marian Wong and Mhairi Alexander CORRECTED PROOF Research Article Predator detection and a possible dispersal behavior of the invasive New Zealand mud snail, Potamopyrgus antipodarum (Gray, 1843) Edward P. Levri*, Rebecca Luft and Xiaosong Li Division of Mathematics and Natural Sciences, Penn State – Altoona, 3000 Ivyside Park, Altoona, PA 16601, USA Author e-mails: [email protected] (EPL), [email protected] (RL), [email protected] (XL) *Corresponding author Co-Editors’ Note: This paper is a contri- bution to the Behaviour in Aquatic Abstract Invasions Special Issue of Aquatic Invasions. Papers in this Special Issue Behavior can play a large role in invasion success. Of particular importance may be explore how behaviour contributes to the ability of an invader to detect and respond to unfamiliar potential predators. We invasion success; native species’ examined a behavior related to dispersal in populations of the New Zealand mud behavioural strategies that reduce the snail (Potamopyrgus antipodarum) in response to chemical cues from crayfish and impacts of invasions; how knowledge of behaviour can enhance management piscine predators. Populations of the snail isolated from North America and its of invasive species; and potential effects native New Zealand were used in two separate experiments. In both experiments, of climate change on the behavioural groups of snails were placed in water either with or without predator cues, and the impacts of aquatic invasive species. number of snails found floating attached to the surface tension of the water after ten Citation: Levri EP, Luft R, Li X (2019) minutes was noted.
    [Show full text]
  • New Zealand Mudsnails
    New Zealand Mudsnails How to Prevent the Spread of New Zealand Mudsnails through Field Gear This brochure is a guide for field detection and for treating field gear to prevent the spread of New Zealand mudsnails. It is intended for researchers, monitoring crews, watershed survey groups, and anyone else who travels frequently between aquatic or riparian locations. Second Edition February 2010 1DevilsDevills Lake, Lake, Oregon, Oregon is is heavily heavily infested infested with with New New Zealand Zealand mudsnails.mudsnails. Prevent Prevent the the spread spread of of New New Zealand Zealand mudsnails mudsnails by bycleaning cleaning geargear and and boats boats and and not not moving moving water water fromfrom infested waters waters into into new new bodies bodies of of water. water. (Photo by Jane and Michael Liu.) INTRODUCTION Range Range expansion expansion of of the the mudsnail mudsnail The New Zealand mudsnail hashas been been unwittingly unwittingly hastened hastened by (Potamopyrgus antipodarum) is an anglers,by anglers, hunters, hunters, and and field field person person- - introduced aquatic species that has nel—innel—in other other words, words, people people whowho invaded estuaries,estuaries, lakes,lakes, rivers, rivers, and frequentlyfrequently move move from between one watershed streams streamsand streams in Washington, in Washington, Oregon, Oregon, toand the lakes next, inhauling watersheds, wet waders, hauling nets, California, and many other states andwet other waders, gear nets, with and them. other Once gear withthe in the western U.S. ItIt waswas firstfirst notednoted mudsnailthem. Once is established the mudsnail in ais new estab- in North America in the late 19801980ss inin habitat,lished in it ais new impossible habitat, to it iseradicate impossi - the Snake River and has since spread itble without to eradicate damaging it without other damaging com- throughout the West.
    [Show full text]
  • Lake Tahoe Region Aquatic Invasive Species Management Plan CALIFORNIA ‐ NEVADA
    Lake Tahoe Region Aquatic Invasive Species Management Plan CALIFORNIA ‐ NEVADA DRAFT September 2009 Pending approval by the Aquatic Nuisance Species Task Force This Aquatic Invasive Species Management Plan is part of a multi-stakeholder collaborative effort to minimize the deleterious effects of nuisance and invasive aquatic species in the Lake Tahoe Region. This specific product is authorized pursuant to Section 108 of Division C of the Consolidated Appropriations Act of 2005, Public Law 108-447 and an interagency agreement between the U.S. Army Corps of Engineers and the California Tahoe Conservancy. This product was prepared by: Suggested citation: USACE. 2009. Lake Tahoe Region Aquatic Invasive Species Management Plan, California - Nevada. 84 pp + Appendices. Cover photo credits: Lake Tahoe shoreline, Toni Pennington (Tetra Tech, Inc.); curlyleaf pondweed, Steve Wells (PSU); Asian clams, Brant Allen (UCD); bullfrog (USGS), zebra mussels (USGS); bluegill and largemouth bass (USACE) ii i Table of Contents Acknowledgements................................................................................................................ iii Acronyms ............................................................................................................................... iv Glossary.................................................................................................................................. vi Executive Summary ...........................................................................................................
    [Show full text]
  • New Zealand Mud Snail Investigations in Utah
    The following is a list of the presentations at the New Zealand Mud Snail conference in Bozeman, MT. on August 16th and 17th. The comments in blue are from my notes, including this opening paragraph. Some of the issues that consistently arose were: 1. We still need more information 2. We still have not found an effective and efficient eradication technique 3. We need a consistent message for the public 4. Early detection of potential new populations is of utmost imporatance incontrolling spread (where will they show up next?) 5. We need to get the management and control plan to ANS this year Abstracts and Comments: New Zealand mud snail investigations in Utah Mark Vinson Department of Aquatic, Watershed, and Earth Resources and Department of Biology, Utah State University, Logan, Utah, 84322, [email protected], 435-797-2038 The New Zealand mud snail (NZMS), Potamopyrgus antipodarum (Gastropoda: Hydrobiidae) was first collected in Utah in September 2001 in the Green River downstream from Flaming Gorge Dam. Since then the snail has spread throughout northern Utah. We will present data on their current distribution. We also evaluated if juvenile rainbow trout could assimilate nutrients or use energy from New Zealand mud snails was via experimental additions and movement of the stable isotopes N15 and C13 through several trophic levels and evaluation of changes in fish weight over time. Trout fed NZMSs gained significantly less weight and absorbed less of a stable isotope tracer then those fed a native amphipod food source, Hyalella azteca. On average, fish fed NZMSs lost 0.2% of their initial body weight per day over three 100 day feeding trials.
    [Show full text]
  • Hydrobiidae Descriptions
    An Ecological, Morphological and Molecular Investigation of Beddomeia Species (Gastropoda: Hydrobiidae) in Tasmania Karen Richards BScEd, Melbourne College of Advanced Education BAppSc (Hons), Deakin University A thesis submitted in fulfilment of the requirements for the Degree of Doctor of Philosophy University of Tasmania September 2010 ii Declaration This thesis contains no material which has been accepted for the award of any other degree or diploma by the University or any other institution. To the best of my knowledge the thesis contains no material previously published or written by another person except where acknowledgement is made in the text. Karen Richards Date Statement of Authority of Access This thesis may be made available for loan and limited copying is permitted in accordance with the Copyright Act 1968. Karen Richards Date iii iv Abstract Narrow-range endemic species are thought to have naturally small distributions, limited by size, mobility, dispersal capabilities, specific habitat requirements and biogeographical boundaries. Many narrow range taxa are poorly reserved and most threatened freshwater invertebrate taxa in Tasmania, including the majority of Beddomeia species, fall into this category. Management of such taxa is reliant on informed ecological data which is not currently available for many freshwater invertebrates. To address the need for more detailed information on one such group of aquatic invertebrates, this study obtained spatial and ecological data for a number of Beddomeia species and identified habitat variables that together explained the snail distributions. A combination of geology, catchment size, forest type, flow and disturbance were identified as significant explanatory variables of Beddomeia presence within a river catchment.
    [Show full text]
  • Potamopyrgus Antipodarum in a Hatchery Environment
    Management of Biological Invasions (2021) Volume 12, Issue 1: 85–95 Special Issue: Proceedings of the 21st International Conference on Aquatic Invasive Species Guest editors: Sarah Bailey, Mattias Johansson, Brenda Koenig and Linda Shaw CORRECTED PROOF Short Communication Efficacy of low-dose EarthTec® QZ treatment for the control of New Zealand mud snails Potamopyrgus antipodarum in a hatchery environment Devon C. Oliver*, Alex D. Loubere and Jeff A. Sorensen Arizona Game & Fish Department, Phoenix, AZ 85086, USA Author e-mails: [email protected] (DCO), [email protected] (ADL), [email protected] (JAS) *Corresponding author Co-Editors’ Note: This study was contributed in relation to the 21st International Conference Abstract on Aquatic Invasive Species held in Montreal, Canada, October 27–31, 2019 (http://www.icais. The New Zealand mud snail (NZMS) Potamopyrgus antipodarum, is an invasive org/html/previous21.html). This conference has species of freshwater snail that has become established in the United States. Where provided a venue for the exchange of they establish, NZMSs can achieve very high densities and have negative ecological information on various aspects of aquatic invasive species since its inception in 1990. impacts. The discovery of NZMSs at Page Springs Hatchery (PSH) in 2019 triggered The conference continues to provide an a need for treatment options in a hatchery that would not result in eradication of fish ® opportunity for dialog between academia, stocks. The effects of a low-dose (30 ppb) treatment of EarthTec QZ on NZMSs, industry and environmental regulators. Page springsnails Pyrgulopsis morrisoni and pond snails Physella virgata were This paper was not presented at the Conference evaluated for 39 days.
    [Show full text]
  • Poor Growth of Rainbow Trout Fed New Zealand Mud Snails Potamopyrgus Antipodarum
    See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/233054924 Poor Growth of Rainbow Trout Fed New Zealand Mud Snails Potamopyrgus antipodarum Article in North American Journal of Fisheries Management · June 2008 DOI: 10.1577/M06-039.1 CITATIONS READS 60 342 2 authors: Mark Vinson Michelle Baker United States Geological Survey Utah State University 43 PUBLICATIONS 1,764 CITATIONS 69 PUBLICATIONS 2,346 CITATIONS SEE PROFILE SEE PROFILE Some of the authors of this publication are also working on these related projects: Filtering with a drill pump: An efficient method to collect suspended sediment View project Forest Service Monitoring View project All content following this page was uploaded by Mark Vinson on 20 May 2014. The user has requested enhancement of the downloaded file. 28:701–709, 2008 North American Journal of Fisheries Management [Article] � Copyright by the American Fisheries Society 2008 DOI: 10.1577/M06-039.1 Poor Growth of Rainbow Trout Fed New Zealand Mud Snails Potamopyrgus antipodarum MARK R. VINSON* U.S. Bureau of Land Management, National Aquatic Monitoring Center, Department of Watershed Sciences, Utah State University, Logan, Utah 84322-5210, USA MICHELLE A. BAKER Department of Biology and Ecology Center, Utah State University, Logan, Utah 84322-5305, USA Abstract.—The New Zealand mud snail (NZMS) Potamopyrgus antipodarum is rapidly invading North American freshwaters, leading to speculation that native fisheries, especially those involving trout, will be negatively impacted. To assess whether trout would consume NZMSs and could assimilate nutrients from them, we conducted a laboratory 15N tracer study, a laboratory feeding study, and bioenergetics modeling with rainbow trout Oncorhynchus mykiss; we also evaluated 5 years of diet and condition data describing rainbow trout and brown trout Salmo trutta collected from a river colonized by NZMSs.
    [Show full text]
  • District B Team Lead) NCRWQCB Will Put Forth on Water Usage Will Further Carve the Path of Our State’S Legacy
    Y E A R 2 7 , D I S T R I C T B V O L U M E 2 7 , I S S U E 2 TRIBUTARY TRIBUNE S T O R I E S A N D A R T B Y C O R P S M E M B E R S O F T H E C A L I F O R N I A C O N S E R V A T I O N C O R P S W A T E R S H E D S T E W A R D S P R O G R A M I N P A R T N E R S H I P W I T H A M E R I C O R P S TINY HOME: ROCK BOTTOM ART IN THIS ISSUE BY: STERLING MÉUS, Tiny Home: Rock Bottom Art Page 1 SERVING AT CALIF. SEA GRANT RUSSIAN RIVER SALMON AND STEELHEAD MONITORING PROGRAM Life During the Pandemic: Taking Page 1 Inspiration From Nature Have you ever been walking in a river or stream? Have you noticed small lumps or cylinders lying on the rocks along the river floor? Most FIRE AND FLOOD: Understanding Page 2 people ignore or dismiss those small cylinders, thinking that they are Climate Implications for California sticks or branches stuck on the riverbed. They are in fact creations, and homes, to a remarkable species of insect known as the Caddisfly. Restoration Watch: Opening Tide Page 3 Caddisflies, in the order Trichoptera, dwell at the bottom of rivers and Gates to Opportunity on..
    [Show full text]
  • Potamopyrgus Antipodarum) Threatens Michigan’S Waterways
    State of Michigan’s Status and Strategy for New Zealand Mudsnail Management Scope The invasive New Zealand mudsnail (Potamopyrgus antipodarum) threatens Michigan’s waterways. The goals of this document are to: • Summarize current level of understanding on the biology and ecology of the New Zealand mudsnail. • Summarize current management options for the New Zealand mudsnail in Michigan. • Identify possible future directions of New Zealand mudsnail management in Michigan. Biology and Ecology I. Identification U.S. Geological Survey The New Zealand mudsnail is a gastropod of the genus Potamopyrgus within Hydrobiidae. This small aquatic snail is native to New Zealand and typically measures between 4-5mm in size. Its dextral, spiraling shell is helpful in identification. The gray to light or dark brown shell is cone- shaped and slender with a pointed whorl. Adults have seven to eight right-handed whorls and can measure up to 12 mm long (Richards et al. 2004). The operculum is ovate in shape, resembling an ear; this feature separates this species from other freshwater snails (Zaranko et al. 1997). The New Zealand mudsnail shares similar shell appearances to native species including Eremopyrgus eganensis and Juturnia tularosae (Richards et al. 2004). However, the New Zealand mudsnail has a longer and narrower shell when compared to Eremopyrgus eganensis and Juturnia tularosae, which typically have five or less whorls (Zaranko et al. 1997, Richards et al. 2004). II. Life History The New Zealand mudsnail reproduces both sexually and asexually. Females can reproduce asexually through parthenogenesis. Populations in the United States are mainly composed of asexually reproducing females (Nielson et al.
    [Show full text]