DOCSLIB.ORG

Modeling the Life History of Sessile Rotifers: Larval Substratum Selection Through Reproduction

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Modeling the Life History of Sessile Rotifers: Larval Substratum Selection Through Reproduction Modeling the life history of sessile rotifers: larval substratum selection through reproduction Andrea N. Young, Rick Hochberg, Elizabeth J. Walsh & Robert L. Wallace Hydrobiologia The International Journal of Aquatic Sciences ISSN 0018-8158 Hydrobiologia DOI 10.1007/s10750-018-3802-x 1 23 Your article is protected by copyright and all rights are held exclusively by Springer Nature Switzerland AG. This e-offprint is for personal use only and shall not be self- archived in electronic repositories. If you wish to self-archive your article, please use the accepted manuscript version for posting on your own website. You may further deposit the accepted manuscript version in any repository, provided it is only made publicly available 12 months after official publication or later and provided acknowledgement is given to the original source of publication and a link is inserted to the published article on Springer's website. The link must be accompanied by the following text: "The final publication is available at link.springer.com”. 1 23 Author's personal copy Hydrobiologia https://doi.org/10.1007/s10750-018-3802-x (0123456789().,-volV)(0123456789().,-volV) ROTIFERA XV Modeling the life history of sessile rotifers: larval substratum selection through reproduction Andrea N. Young . Rick Hochberg . Elizabeth J. Walsh . Robert L. Wallace Received: 14 July 2018 / Revised: 13 October 2018 / Accepted: 15 October 2018 Ó Springer Nature Switzerland AG 2018 Abstract Although the theoretical underpinnings of cohort of larvae. Our Basic Model assessed fitness as habitat selection by marine invertebrate larvae have simply settling on a substratum using only the larval been well studied, this theory has been neglected for elements and revealed statistically greatest fitness freshwater sessile rotifers. To study how substratum when swimming speed decreased with age and when selection affects larval fitness, we developed a substratum preference was constant or exhibited mid- dynamic model to examine influences of three age competence. The Reproductive Model assessed elements of larval life (survival, substratum accep- fitness (mean number of offspring adult-1)asa tance, substratum encounter probability) and substra- function of substratum. We compared reproduction tum-dependent reproductive success in adults. Monte on neutral substrata to substrata where quality varied Carlo simulation models were run using an initial and separately as a function of adult population density: coloniality (synergism) versus competition. The model showed fitness was statistically greatest Guest editors: Steven A. J. Declerck, Diego Fontaneto, Rick Hochberg & Terry W. Snell / Crossing Disciplinary when larval swimming speed decreased with age and Borders in Rotifer Research when coloniality increased reproduction. We also explored conditions where populations of planktonic Electronic supplementary material The online version of adults could survive. The model is applicable to sessile this article (https://doi.org/10.1007/s10750-018-3802-x) con- tains supplementary material, which is available to authorized organisms and may be modified to examine other life users. A. N. Young R. L. Wallace (&) Department of Mathematical Sciences, Ripon College, Department of Biology, Ripon College, Ripon, WI 54971, Ripon, WI 54971, USA USA e-mail: [email protected] R. Hochberg Department of Biological Sciences, University of Massachusetts at Lowell, Lowell, MA 01854, USA E. J. Walsh Department of Biological Sciences, University of Texas at El Paso, El Paso, TX 79968, USA 123 Author's personal copy Hydrobiologia history activities including selection of mates, prey, or et al., 2004; Kinlan et al., 2005; Toonen & Tyre, 2007; territory. Burgess et al., 2012). However, the life history characteristics of sessile rotifers (Monogononta: Gne- Keywords Behavior Á Dynamic modeling Á siotrocha: Atrochidae, Collothecidae, and Flosculari- Gnesiotrocha Á Planktonic Á Substratum-dependent idae) differ from those of marine invertebrates. For reproduction Á Rotifera example, marine invertebrates often release large numbers of relatively long-lived (days, weeks, months) larvae that may disperse over short Larvae … are indeed not helpless, for they are endowed with the power of choice, and with a period of time during which that choice (* 1 m) to long ([ 750 km) distances and have may be made. — Wilson (1952). extended development times (days to months) (Kempf, 1981; Hadfield, 1998; Shanks, 2009). They also exhibit extreme diversity in size (* 200 to [ 3000 lm) and form (Levin & Bridges, 1995), and as a group use varied energy sources: endosymbiotic Introduction autotrophy, lecithotrophy, osmotrophy, and plank- totrophy, as well as poecilogony (Vance, 1973; Understanding a species requires comprehending its McEdward, 1995; Chia et al., 1996; Allen & Pernet, entire life history, not just the morphological and 2007). Additionally, during their free-swimming ecological features attendant to the adult (Werner & phase, marine larvae usually experience an extensive, Gilliam, 1984; Werner, 1988). Undeniably many relatively uniform, open-water existence, where suit- studies have documented ontogenetic (developmental) able substrata are generally not encountered. As a shifts; these include shifts in diet (e.g., polychaetes: consequence many, but certainly not all, marine larvae Hentschel, 1998; harpacticoid copepods: Decho & are capable of postponing settlement in the absence of Fleeger, 1988; fishes: Daly et al., 2009; amphibians: suitable habitat (Pechenik, 1980). In contrast, sessile Schriever & Williams, 2013), behavior (Despland & rotifers release relatively few, short-lived (hours to Hamzeh, 2004), physiology (Woods & Wilson, 2013), days) larvae that exhibit little variation in size (ca. and habitat use (Richards, 1992) (see de Roos & 400 lm) or form (Wallace et al., 2015), and which Persson, 2013). appear to be lecithotrophic or possess limited ability to Interpreting the life history of sessile invertebrates feed (Wallace et al., 1998; Hochberg, 2014; Hochberg is no different; it requires an understanding of their et al. (in this volume). Moreover hatchlings immedi- distinct bipartite existence: larval life is transitory, ately encounter a mosaic of habitats dominated by ending either in death or with a cascade of searching diverse hydrophytes that provide a rich landscape for and settling behaviors culminating in attachment and settlement with variable morphologies and chemis- subsequent metamorphosis into an adult (Crisp & tries that often differ over short distances (Meksuwan Meadows, 1963; Wallace, 1980; Pawlik, 1992; et al., 2014). Burgess et al., 2009). Accordingly, a successful larva Free-swimming larvae may provide sessile rotifers must survive planktonic life, encounter at least one several advantages including (1) colonization of a substratum, attach, metamorphose to adulthood, and preferred substratum, including new hydrophyte reproduce. Clearly, if settlement is irreversible, choice growth that has not been weakened by herbivores, of a high-quality substratum becomes critical to pathogens, or age; (2) establishment of a colony or maximize fitness (Hodin et al., 2015). Thus, one may alternatively avoidance of competition; and (3) wider infer that sessile invertebrates must make evolutionary dispersal that may reduce inbreeding. In contrast, tradeoffs that are not intuitively obvious. disadvantages include (1) death in the plankton due to Undeniably there is a rich literature on the life starvation and/or predation; (2) delayed metamorpho- history of most marine invertebrate larvae (Chia & sis with subsequent inability to complete it; and (3) Rice, 1978; Young, 1990; McEdward, 1995; Hadfield, poor adult reproduction due to selection of an inferior 1998), including conceptualizing the process of sub- habitat (Pechenik, 1999). stratum selection (Doyle, 1975; Roughgarden et al., To better understand the life history of sessile 1985; Strathmann, 1985; Rumrill, 1990; Marechal rotifers, we developed a dynamic model with the 123 Author's personal copy Hydrobiologia capacity to vary environmental and sessile rotifer life with the potential for reproduction. Components of the history features including (a) relative availability of model are fully described in Supplemental Document. potential substrata, (b) cohort size, (c) planktonic In the basic model (BM), we defined fitness simply as survival, (d) substratum choice, and (e) adult survival settling and metamorphosing, with the assumption that and subsequent reproduction. Here we present our metamorphosis leads to equal reproduction on all model, explore some of its results, offer testable hy- substrata (Doyle, 1975). In the reproductive model potheses regarding sessile rotifer life histories based (RM), we defined reproductive fitness as metamor- on outcomes of model runs, and suggest areas where phosing with subsequent reproduction, which could additional research is needed. vary as a function of substratum or density of settled larvae. The RM followed the behavior of the original population and one generation of offspring. We also Materials and methods explored conditions where adults could survive in the plankton. Following, we provide a brief overview of Model development the environmental and life history functions (LHF) that we incorporated into the model (Table 1). Our model reflects ideas from several previously LHF 1 Larval survival in the plankton. Larval published models of sessile animals (Doyle, 1975; survival was set such that during each time
Load more

Recommended publications
  • Invert4 2 161 172 Kutikova.PM6
    Çîîëîãèÿ áåñïîçâîíî÷íûõ, 2007, 4(2): 161172 © ÇÎÎËÎÃÈß ÁÅÑÏÎÇÂÎÍÎ×ÍÛÕ, 2007 Ïÿòü âèäîâ êîëîâðàòîê ñåìåéñòâà Flosculariidae (Rotifera), èõ ëè÷èíêè è ìåòàìîðôîç Ë.À. Êóòèêîâà Çîîëîãè÷åñêèé èíñòèòóò ÐÀÍ, Ñàíêò-Ïåòåðáóðã, 199034, Ðîññèÿ. e-mail: [email protected] ÐÅÇÞÌÅ: Äîïîëíåíî è óòî÷íåíî îïèñàíèå ìîðôîëîãèè ïÿòè âèäîâ êîëîâðàòîê cåìåéñòâà Flosculariidae: Floscularia janus (Hudson, 1881), Ptygura pilula (Cubitt, 1872), Beuchampia crucigera (Dutrochet, 1812), Limnias melicerta Weisse, 1848, Lacinularia ismailoviensis (Pog- genpol, 1872). Ïðåäñòàâëåíû ñâåäåíèÿ î ìåòàìîðôîçå íåñêîëüêèõ âèäîâ èç ðàçëè÷íûõ ðîäîâ. ÊËÞ×ÅÂÛÅ ÑËÎÂÀ: êîëîâðàòêè, Flosculariidae, ñåññèëüíûå è êîëîíèàëüíûå êîëîâ- ðàòêè, ëè÷èíî÷íûé ìåòàìîðôîç. Five species of rotifers of the family Flosculariidae (Rotifera), their larvae and metamorphosis L.A. Kutikova Zoological Institute RAS, Saint-Petersburg, 199034, Russia. e-mail: [email protected] SUMMARY: The descriptions of morphological structures of five species of rotifers of the family Flosculariidae (Floscularia janus (Hudson, 1881), Ptygura pilula (Cubitt, 1872), Beau- champia crucigera (Dutrochet, 1812), Limnias melicerta Weisse, 1848, Lacinularia ismailovien- sis (Poggenpol, 1872) are expanded and updated. The larval metamorphosis of species from several genera is described. KEYWORDS: Rotifera, Flosculariidae, sessile and colonial rotifers, larval metamorphosis. Ââåäåíèå Ìàñòàêñ ìàëëåîðàìàòíîãî òèïà. Ïî áèîëî- ãèè, ýêîëîãèè è ñòðîåíèþ ñåññèëüíûõ êî- Ñåìåéñòâî Flosculariidae âêëþ÷àåò 7 ðî- ëîâðàòîê ñóùåñòâóåò çàìåòíîå ÷èñëî
    [Show full text]
  • Paper Received: 28.11.2019 Revised Received: 11.12.2019 Accepted: 12.12.2019
    Journal Home page : www.jeb.co.in « E-mail : [email protected] Review Article Journal of Environmental Biology TM p-ISSN: 0254-8704 e-ISSN: 2394-0379 JEB CODEN: JEBIDP DOI : http://doi.org/10.22438/jeb/41/1/MRN-1344 White Smoke Plagiarism Detector Just write. Review on the ecology and taxonomy of sessile rotifers (Rotifera) with special reference to Mexico S.S.S. Sarma1*, M.A. Jiménez-Santos2, S. Nandini1 and R.L. Wallace3 1Laboratory of Aquatic Zoology, National Autonomous University of Mexico, CP-54090 Tlalnepantla, México 2Posgrado en Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, CP-04510, Mexico 3Department of Biology, Ripon College, Ripon, WI 54971-0248, USA *Corresponding Author Email : [email protected] Paper received: 28.11.2019 Revised received: 11.12.2019 Accepted: 12.12.2019 Abstract Although comprising <0.5% of all the known species of Rotifera, sessile rotifers are an important component in freshwater ecosystems, especially shallow waterbodies. During the last eight decades, fewer than 80 publications have dealt specifically with sessile rotifers, while more than 7600 articles have focused on rotifers in general. In this work research on the sessile rotifers with emphasis on the Mexican fauna has been reviewed and some additional information on the new records has been included. Difficulties involved in collection and maintenance of sessile rotifers, as well as problems of identification and quantification have been considered. Published data on the ecology and taxonomy of this group has also been reviewed. There are 35 species of sessile rotifers from three families Atrochidae, Collothecidae, and Flosculariidae, but to that four more species in the planktonic family Conochilidae may be added, as recent molecular research indicates that this family lies within Flosculariidae.
    [Show full text]
  • Old Woman Creek National Estuarine Research Reserve Management Plan 2011-2016
    Old Woman Creek National Estuarine Research Reserve Management Plan 2011-2016 April 1981 Revised, May 1982 2nd revision, April 1983 3rd revision, December 1999 4th revision, May 2011 Prepared for U.S. Department of Commerce Ohio Department of Natural Resources National Oceanic and Atmospheric Administration Division of Wildlife Office of Ocean and Coastal Resource Management 2045 Morse Road, Bldg. G Estuarine Reserves Division Columbus, Ohio 1305 East West Highway 43229-6693 Silver Spring, MD 20910 This management plan has been developed in accordance with NOAA regulations, including all provisions for public involvement. It is consistent with the congressional intent of Section 315 of the Coastal Zone Management Act of 1972, as amended, and the provisions of the Ohio Coastal Management Program. OWC NERR Management Plan, 2011 - 2016 Acknowledgements This management plan was prepared by the staff and Advisory Council of the Old Woman Creek National Estuarine Research Reserve (OWC NERR), in collaboration with the Ohio Department of Natural Resources-Division of Wildlife. Participants in the planning process included: Manager, Frank Lopez; Research Coordinator, Dr. David Klarer; Coastal Training Program Coordinator, Heather Elmer; Education Coordinator, Ann Keefe; Education Specialist Phoebe Van Zoest; and Office Assistant, Gloria Pasterak. Other Reserve staff including Dick Boyer and Marje Bernhardt contributed their expertise to numerous planning meetings. The Reserve is grateful for the input and recommendations provided by members of the Old Woman Creek NERR Advisory Council. The Reserve is appreciative of the review, guidance, and council of Division of Wildlife Executive Administrator Dave Scott and the mapping expertise of Keith Lott and the late Steve Barry.
    [Show full text]
  • Gnesiotrocha, Monogononta, Rotifera) in Thale Noi Lake, Thailand
    Zootaxa 2997: 1–18 (2011) ISSN 1175-5326 (print edition) www.mapress.com/zootaxa/ Article ZOOTAXA Copyright © 2011 · Magnolia Press ISSN 1175-5334 (online edition) Diversity of sessile rotifers (Gnesiotrocha, Monogononta, Rotifera) in Thale Noi Lake, Thailand PHURIPONG MEKSUWAN1, PORNSILP PHOLPUNTHIN1 & HENDRIK SEGERS2,3 1Plankton Research Unit, Department of Biology, Faculty of Science, Prince of Songkla University, Hat Yai 90112, Songkhla, Thai- land. E-mail: [email protected], [email protected] 2Freshwater Laboratory, Royal Belgian Institute of Natural Sciences, Vautierstraat 29, 1000 Brussels, Belgium. E-mail: [email protected] 3Corresponding author Abstract In response to a clear gap in knowledge on the biodiversity of sessile Gnesiotrocha rotifers at both global as well as re- gional Southeast Asian scales, we performed a study of free-living colonial and epiphytic rotifers attached to fifteen aquat- ic plant species in Thale Noi Lake, the first Ramsar site in Thailand. We identified 44 different taxa of sessile rotifers, including thirty-nine fixosessile species and three planktonic colonial species. This corresponds with about 40 % of the global sessile rotifer diversity, and is the highest alpha-diversity of the group ever recorded from a single lake. The record further includes a new genus, Lacinularoides n. gen., containing a single species L. coloniensis (Colledge, 1918) n. comb., which is redescribed, and several possibly new species, one of which, Ptygura thalenoiensis n. spec. is formally described here. Ptygura noodti (Koste, 1972) n. comb. is relocated from Floscularia, based on observations of living specimens of this species, formerly known only from preserved, contracted specimens from the Amazon region.
    [Show full text]
  • Redalyc.Rotifera from Southeastern Mexico, New Records and Comments on Zoogeography
    Anales del Instituto de Biología. Serie Zoología ISSN: 0368-8720 [email protected] Universidad Nacional Autónoma de México México García-Morales, Alma Estrella; Elías GUTIÉRREZ, Manuel Rotifera from southeastern Mexico, new records and comments on zoogeography Anales del Instituto de Biología. Serie Zoología, vol. 75, núm. 1, julio-diciembre, 2004, pp. 99-120 Universidad Nacional Autónoma de México Distrito Federal, México Disponible en: http://www.redalyc.org/articulo.oa?id=45875103 Cómo citar el artículo Número completo Sistema de Información Científica Más información del artículo Red de Revistas Científicas de América Latina, el Caribe, España y Portugal Página de la revista en redalyc.org Proyecto académico sin fines de lucro, desarrollado bajo la iniciativa de acceso abierto Anales del Instituto de Biología, Universidad Nacional Autónoma de México, Serie Zoología 75(1): 99-120. 2004 Rotifera from southeastern Mexico, new records and comments on zoogeography ALMA ESTRELLA GARCÍA-MORALES* MANUEL ELÍAS-GUTIÉRREZ* Resumen. Se examinaron muestras litorales y pelágicas procedentes de 36 sistemas acuáticos del sureste de México y la Península de Yucatán. Se encontraron 128 taxa, de los cuales 22 constituyen ampliaciones de ámbito para esta región (Epiphanes brachionus f. spinosus, Anuraeopsis navicula, Euchlanis semicarinata, Macrochaetus collinsi, Colurella sulcata, C. uncinata f. bicuspidata, Lepadella costatoides, L. cyrtopus, Lecane curvicornis f. lofuana, L. curvicornis f. nitida, L. rhytida, Scaridium bostjani, Trichocerca elongata f. braziliensis, Dicranophorus epicharis, D. halbachi, D. prionacis, Testudinella mucronata f. hauerensis, Limnias melicerta, Ptygura libera, Hexarthra intermedia f. braziliensis, Filinia novaezealandiae y Collotheca ornata. Todos los nuevos registros se ilustran y discuten. Adicionalmente se comenta sobre la distribución geográfica de las especies encontradas.
    [Show full text]
  • Origin of Chordates Part-I
    ORIGIN OF CHORDATES Evolution of chordate was one of the most important event in the history of chordate as it was the beginning of evolution of more advanced chordates like bird and mammals. It is the story of origin from a primitive invertebrate like creatures to early chordates. Though first fossil of the first vertebrate the ostrachoderm was discovered from the Ordovician period but it might have originated in late Cambrian period. As early chordates were soft bodied, their fossil records are not preserved. Hence, to trace their ancestry, we have to find out the similarity among different deuterostomes to trace the origin of chordates. Some structural features shared by them such as bilateral symmetry, antero-posterior body axis, triploblastic coelomate condition, etc., may he because of their common ancestry. TIME OF ORIGIN: Late Cambrian period PLACE OF ORIGIN: Fresh water THEORIES OF INVERTEBRATE ANCESTRY OF CHORDATES Several theories have been put forwarded to explain the origin of chordates either directly from some invertebrate group or through the intervention of some protochordate. Almost every invertebrate phylum—Coelenterata, Nemertean, Phoronida, Annelids, Arthropods and Echinodermatashas been suggested. But these theories are far from being satisfactory and convincing and have only a historical value. Only the echinoderm theory has received some acceptance. DIVISION OF BILATERIA The Bilateria is divided into two major divisions (1) Protostomia and (2) Deuterostornia. This division is based on the differences in embryonic and larval developments. Protostomia includes from Annelida to Arthropoda while deuterostomia includes Echinodermata, Pogonophora and Chordate. DEUTEROSTOME LINE OF CHORDATE EVOLUTION Following common features of all Deuterostomes suggests strong evidence of a closer evolutionary relationship between the three principal deuterostome phyla – Echinodermata, Hemichordata and Chordata.
    [Show full text]
  • The Biodiverse Rotifers (Rotifera: Eurotatoria)
    Bonn zoological Bulletin 68 (1): 147–162 ISSN 2190–7307 2019 · Sharma B.K. & Sharma S. http://www.zoologicalbulletin.de https://doi.org/10.20363/BZB-2019.68.1.147 Research article urn:lsid:zoobank.org:pub:D9308652-B9BF-4BBB-B573-F1C4B53E1AC5 The biodiverse rotifers (Rotifera: Eurotatoria) of Northeast India: faunal heterogeneity, biogeography, richness in diverse ecosystems and interesting species assemblages Bhushan Kumar Sharma1, * & Sumita Sharma2 1, 2 Department of Zoology, North-Eastern Hill University, Shillong – 793 022, Meghalaya, India * Corresponding author: Email: [email protected] 1 urn:lsid:zoobank.org:author:FD069583-6E71-46D6-8F45-90A87F35BEFE 2 urn:lsid:zoobank.org:author:668E0FE0-C474-4D0D-9339-F01ADFD239D1 Abstract. The biodiverse Rotifera of northeast India (NEI) revealed 303 species belonging to 53 genera and 24 families; ~96% of these species examined from seven states of NEI affirm the rotifer heterogeneity of our plankton and semi-plank- ton collections. This study documents the record number of species of global and regional biogeographic interest, high- lights affinity with Southeast Asian and Australian faunas, and indicates notable heterogeneity in richness and composition amongst the seven northeastern states. The speciose rotifers of small lentic biotopes of Arunachal Pradesh, Mizoram, Nagaland, Meghalaya, Manipur and Tripura, the floodplain lakes beels( ) and small wetlands (dobas and dubies) of the Brahmaputra and the Barak floodplains of Assam, and the floodplain lakes (pats) of Manipur are noteworthy. Deepor Beel and Loktak Lake (two Ramsar sites) are the globally rich rotifer `hotspots’. Interesting assemblages per sample of 80+ species in certain beels and pats, and up to 50 species in dobas and dubies depict the `Rotifera paradox’.
    [Show full text]
  • About the Book the Format Acknowledgments
    About the Book For more than ten years I have been working on a book on bryophyte ecology and was joined by Heinjo During, who has been very helpful in critiquing multiple versions of the chapters. But as the book progressed, the field of bryophyte ecology progressed faster. No chapter ever seemed to stay finished, hence the decision to publish online. Furthermore, rather than being a textbook, it is evolving into an encyclopedia that would be at least three volumes. Having reached the age when I could retire whenever I wanted to, I no longer needed be so concerned with the publish or perish paradigm. In keeping with the sharing nature of bryologists, and the need to educate the non-bryologists about the nature and role of bryophytes in the ecosystem, it seemed my personal goals could best be accomplished by publishing online. This has several advantages for me. I can choose the format I want, I can include lots of color images, and I can post chapters or parts of chapters as I complete them and update later if I find it important. Throughout the book I have posed questions. I have even attempt to offer hypotheses for many of these. It is my hope that these questions and hypotheses will inspire students of all ages to attempt to answer these. Some are simple and could even be done by elementary school children. Others are suitable for undergraduate projects. And some will take lifelong work or a large team of researchers around the world. Have fun with them! The Format The decision to publish Bryophyte Ecology as an ebook occurred after I had a publisher, and I am sure I have not thought of all the complexities of publishing as I complete things, rather than in the order of the planned organization.
    [Show full text]
  • Elizabeth J. Walsh Professor - Biological Sciences University of Texas at El Paso December 10, 2019
    Elizabeth J. Walsh Professor - Biological Sciences University of Texas at El Paso December 10, 2019 1. Education B.S., Animal Biology, University of Nevada, Las Vegas, December 1983. Ph.D., Environmental Biology, University of Nevada, Las Vegas, Las Vegas, Nevada, May, 1992. Mentor: Dr. Peter L. Starkweather Dissertation title: Ecological and genetic aspects of the population biology of the littoral rotifer Euchlanis dilatata 2. Professional Employment - UTEP September 2014 to Director Ecology and Evolutionary Biology Program Present June 2013 to Interim Department Chair September 2014 September 2008 to Professor of Biological Sciences Present University of Texas at El Paso September 2000 to Associate Professor of Biological Sciences August 2008 University of Texas at El Paso September 1994 to Assistant Professor of Biological Sciences 2000 University of Texas at El Paso 3. Professional Employment – Prior to UTEP July 1993 to Postdoctoral Research Associate, September 1994 Department of Zoology, Brigham Young University September 1992- Lecturer, Rutgers University, December 1992 Population Ecology (Graduate level) December 1991- Gallagher Postdoctoral Fellow, June 1993 Academy of Natural Sciences of Philadelphia 4. Professional Societies American Microscopical Society, Executive Committee Member at Large of Board (2012-2014) Association for the Sciences of Limnology and Oceanography Ecological Society of America Society of Environmental Toxicology and Chemistry, Scientific Program Committee (2011-2012) Southwest Association of Naturalist Sigma Xi 5. Awards 1. UTEP Academy of Distinguished Teachers (April 2019) 1. University Faculty Marshals of Students (May 2019, December 2019) 2. Graduate School Faculty Marshal of Students (May 2017) 3. University of Texas Regents’ Outstanding Teaching Award (2015). UTEP nominee, (2014); College of Science (2012, 2013, 2014); Department of Biological Science (2012, 2013, 2014) 4.
    [Show full text]
  • On the Serotonergic Nervous System of Two Planktonic Rotifers, Conochilus Coenobasis and C
    ARTICLE IN PRESS Zoologischer Anzeiger 245 (2006) 53–62 www.elsevier.de/jcz On the serotonergic nervous system of two planktonic rotifers, Conochilus coenobasis and C. dossuarius (Monogononta, Flosculariacea, Conochilidae) Rick Hochbergà Department of Biological Sciences, University of Massachusetts, One University Avenue, Lowell, MA 01854, USA Received 21 November 2005; received in revised form 4 April 2006; accepted 10 April 2006 Corresponding editor: M. Schmitt Abstract The serotonergic nervous systems of two non-colonial species of Conochilus were examined to obtain the first immunohistochemical insights into the neuroanatomy of species of Flosculariacea (Rotifera, Monogononta). Species of Conochilus, subgenus Conochiloides, were examined using serotonin (5-HT) immunohistochemistry, epifluorescence and confocal laser scanning microscopy, and 3D computer imaging software. In specimens of C. coenobasis and C. dossuarius, the serotonergic nervous system is defined by a dorsal cerebral ganglion, apically directed cerebral neurites, and paired nerve cords. The cerebral ganglion contains approximately four pairs of small 5-HT- immunoreactive perikarya; one pair innervates the posterior nerve cords and three pairs innervate the apical field. The most dorsal pair innervates a coronal nerve ring that encircles the apical field. Within the apical field is a second nerve ring that outlines the inner border of the coronal cilia. Together, both the inner and outer nerve rings may function to modulate ciliary activity of the corona. The other two pairs of perikarya innervate a region around the mouth. Specific differences in the distribution of serotonergic neurons between species of Conochilus and previously examined ploimate rotifers include the following: (a) a lack of immunoreactivity in the mastax; (b) a greater number of apically directed serotonergic neurites; and (c) a complete innervation of the corona in both species of Conochilus.
    [Show full text]
  • The Rotifers of Spanish Reservoirs: Ecological, Systematical and Zoogeographical Remarks
    91 THE ROTIFERS OF SPANISH RESERVOIRS: ECOLOGICAL, SYSTEMATICAL AND ZOOGEOGRAPHICAL REMARKS Jordi de Manuel Barrabin Departament d'Ecologia, Universitat de Barcelona. Avd. Diagonal 645,08028 Barcelona. Spain,[email protected] ABSTRACT This article covers the rotifer data from a 1987/1988 survey of one hundred Spanish reservoirs. From each species brief infor- mation is given, focused mainly on ecology, morphology, zoogeography and distribution both in Spain and within reservoirs. New autoecological information on each species is also established giving conductivity ranges, alkalinity, pH and temperature for each. Original drawings and photographs obtained on both optical and electronic microscopy are shown of the majority of the species found. In total one hundred and ten taxa were identified, belonging to 101 species, representing 20 families: Epiphanidae (1): Brachionidae (23); Euchlanidae (1); Mytilinidae (1 ): Trichotriidae (3): Colurellidae (8); Lecanidae (1 5); Proalidae (2); Lindiidae (1); Notommatidae (5); Trichocercidae (7); Gastropodidae (5); Synchaetidae (1 1); Asplanchnidae (3); Testudinellidae (3); Conochiliidae (5):Hexarthridae (2); Filiniidae (3); Collothecidae (2); Philodinidae (Bdelloidea) (I). Thirteen species were new records for the Iberian rotifer fauna: Kerutella ticinensis (Ehrenberg); Lepadella (X.) ustucico- la Hauer; Lecane (M.) copeis Harring & Myers; Lecane tenuiseta Harring: Lecane (M.) tethis Harring & Myers; Proales fal- laciosa Wulfert; Lindia annecta Harring & Myers; Notommatu cerberus Hudson & Gosse; Notommata copeus Ehrenberg: Resticula nyssu Harring & Myers; Trichocerca vernalis Hauer; Gustropus hyptopus Ehrenberg: Collothecu mutabilis Hudson. Key Words: Rotifera, plankton, heleoplankton, reservoirs RESUMEN Este urticulo proporciona infiirmacicin sobre 10s rotferos hullados en el estudio 1987/88 realizudo sobre cien embalses espafioles. Para cnda especie se da una breve informacicin, ,fundamentalmente sobre aspectos ecoldgicos, morfoldgicos, zoo- geogriificos, asi como de su distribucidn en EspaAa y en los emldses.
    [Show full text]
  • Geology of Saipan Mariana Islands Part 4
    Geology of Saipan Mariana Islands Part 4. Submarine Topography and Shoal- Water Ecology GEOLOGICAL SURVEY PROFESSIONAL PAPER 280-K Geology of Saipan Mariana Islands Part 4. Submarine Topography and Shoal- Water Ecology By PRESTON E. CLOUD, Jr. GEOLOGICAL SURVEY PROFESSIONAL PAPER 280-K Description and interpretation of the submarine topography and of the sediments^ biotas^ and morphology of the reef complex adjacent to a geologically diverse tropical island UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1959 UNITED STATES DEPARTMENT OF THE INTERIOR FRED A. S EATON, Secretary GEOLOGICAL SURVEY Thomas B. Nolan, Director For sale by the Superintendent of Documents, U. S. Government Printing Office Washington 25, D. C. GEOLOGICAL SURVEY PROFESSIONAL PAPER 280 Geology of Saipan, Mariana Islands Part 1. General Geology A. General Geology By PRESTON E. CLOUD, Jr., ROBERT GEORGE SCHMIDT, and HAROLD W. BURKE Part 2. Petrology and Soils B. Petrology of the Volcanic Rocks By ROBERT GEORGE SCHMIDT C. Petrography of the Limestones By J. HARLAN JOHNSON D. Soils By RALPH J. McCRACKEN Part 3. Paleontology E. Calcareous Algae By J. HARLAN JOHNSON F. Difcoaster and Some Related Microfossils By M. N. BRAMLETTE G. Eocene Radiolaria By WILLIAM RIEDEL H. Smaller Foraminifera By RUTH TODD I. Larger Foraminifera By W. STORRS COLE J. Echinoids By C. WYTHE COOKE Part 4. Submarine Topography and Shoal-Water Ecology K. Submarine Topography and Shoal-Water Ecology By PRESTON E. CLOUD, Jr. CONTENTS Page Page Abstract_________________________________________ 361 Shoal-water and shoreline ecology and sediments—Con. Introduction. ______________________________________ 362 Habitat descriptions—Con. Purpose and scope of the work_____________________ 362 Organic reefs and reef benches______________ 383 Field methods and acknowledgments-_______________ 362 Minor reef structures______________________ 384 Systematic identifications and other research aid____ 363 Biotope X.
    [Show full text]