DOCSLIB.ORG

Full Text in Pdf Format

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Full Text in Pdf Format Vol. 20: 181–194, 2013 ENDANGERED SPECIES RESEARCH Published online May 3 doi: 10.3354/esr00493 Endang Species Res Assessing the distinctiveness of the Cultus pygmy sculpin, a threatened endemic, from the widespread coastrange sculpin Cottus aleuticus Patricia E. Woodruff, Eric B. Taylor* Department of Zoology and Biodiversity Research Centre and Beaty Biodiversity Museum, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada ABSTRACT: The Cultus pygmy sculpin is a cottoid fish endemic to Cultus Lake, southwestern British Columbia, Canada, and is listed as ‘threatened’ under the federal Species at Risk Act (SARA). The Cultus pygmy sculpin was first discovered and described as a ‘dwarf’ coastrange sculpin Cottus aleuticus in the 1930s. It matures at a smaller size than the ‘normal’ C. aleuticus, has a lacustrine life history rather than a fluvial one, has different morphological features, and appears to undertake diurnal feeding migrations into the water column to feed on Daphnia, but little else of its biology is known. We used molecular genetic and behavioural assays to further assess the level of differentiation between Cultus pygmy sculpin and stream-dwelling C. aleuticus from several locations. Mitochondrial DNA haplotypes were broadly shared between Cultus pygmy sculpin and coastrange sculpin, and there was no apparent phylogeographic structure. However, analysis of 8 microsatellite analysis loci indicated significant genetic differentiation between parapatric samples of both forms. Laboratory-based experiments showed that, in gen- eral, the Cultus pygmy sculpin was found higher in the water column and was more active off the bottom than coastrange sculpin, but these behavioural differences were influenced by the pres- ence of congeneric C. asper. Molecular and behavioural results support the recognition of the Cul- tus pygmy sculpin as a conservation unit distinct from ‘typical’ C. aleuticus because there is some level of genetic and behavioural discreteness between the forms, and behavioural differences may represent an important aspect of the pelagic life style of the Cultus pygmy sculpin. KEYWORDS: Fish · Threatened species · Designatable units · Behaviour · Microsatellites · Mitochondrial DNA Resale or republication not permitted without written consent of the publisher INTRODUCTION nize and prioritize alternative groups proposed for conservation has proven to be more challenging. In The significance of intraspecific groupings of taxa the USA, under the Endangered Species Act (ESA), for conservation management is increasingly being and in Canada, under the Species at Risk Act recognized; such groupings signal the often rich bio- (SARA), objective criteria have been proposed, deal- heritage of individual taxa (e.g. Bowen 1999), and ing with ‘discreteness’ (e.g. assessed by genetics, can represent variation important to promoting spe- behaviour or geography) of intraspecific populations cies persistence over temporally and spatially vari- and ‘evolutionary significance’ (e.g. in terms of evo- able environments (e.g. Hilborn et al. 2003). While lutionary legacy or local adaptation) of that discrete- the concept of recognizing intraspecific variation in ness, to recognize distinct population segments and conservation plans is well accepted, how to recog- designatable units (DUs), respectively, as legally *Corresponding author. Email: [email protected] © Inter-Research 2013 · www.int-res.com 182 Endang Species Res 20: 181–194, 2013 listable ‘species’. In some cases, however, what are 2009; BCCDC 2012). The Cultus pygmy sculpin is a thought to be evolutionarily distinct units were rec- recognized DU and is legally listed under SARA on ognized and listed before these criteria had been Schedule 1 as a ‘threatened’ species, which means developed or assessed objectively. that recovery planning and critical habitat protection The geoclimatic history of British Columbia (BC), are mandatory, and a recovery strategy for this DU Canada, involved repeated glacial advances and has been completed (National Recovery Team for retreats during the Pleistocene (~ the last 2 million Cultus Pygmy Sculpin 2007). The ‘threatened’ status years), and BC has only about 70 taxonomically rec- of the Cultus pygmy sculpin is based on its apparent ognized freshwater fish species (McPhail 2007). Dur- rarity, some evidence of declines in abundance, and ing Pleistocene glacial advances, the BC freshwater threats to its habitats (COSEWIC 2010). Despite the fish fauna was either eliminated or restricted to ice- status of the Cultus pygmy sculpin, the only studies free refugia peripheral to the main ice sheets, and the on this fish to date were conducted by Ricker in 1932 contemporary freshwater fish fauna consists almost to 1937 (Ricker 1960) and the status reports of the entirely of postglacial immigrants (McPhail 2007). Committee on the Status of Endangered Wildlife in The BC freshwater fish fauna, therefore, is character- Canada (COSEWIC), an independent body whose ized by relatively low taxonomic diversity, but con- primary mandate is to assess the conservation status tains many examples of highly divergent ‘ecotypes’, of Canadian wildlife species (e.g. COSEWIC 2010). intraspecific phylogenetic groups and biological spe- COSEWIC (2010) reported some differences in life cies that have yet to be described formally (e.g. history and morphology between Cultus pygmy McPhail 1984, 2007, Taylor 1999). sculpin and typical coastrange sculpin. For instance, An example of such an ecotype is the Cultus Cultus pygmy sculpin have a pelagic life-style and pygmy sculpin, thought to be a derivative of the small size at maturity, and also exhibit enlarged coastrange sculpin Cottus aleuticus, which was first cephalic pore, smaller pelvic fins, and more pectoral identified by Ricker (1960) and is endemic to Cultus fin rays than the typically stream-dwelling coast- Lake in southwestern BC. The Cultus pygmy sculpin range sculpin (COSEWIC 2010, E. B. Taylor unpubl. is different from ‘typical’ coastrange sculpin in that it data). Ce phalic pores are located on the underside of resides and matures at a smaller size in the lake’s the head and are important in sensory perception in pelagic environment (Ricker 1960, McPhail 2007). A fishes. The small size, large cephalic pores and close relative of the coastrange sculpin, the prickly paired fin characteristics of Cultus pygmy sculpin sculpin C. asper is also found in Cultus Lake, but have been interpreted as potential adaptations to a there apparently only in littoral and benthic habitats pelagic life style (McPhail 2007, COSEWIC 2010). (McPhail 2007). Cultus pygmy sculpin are thought to Notwithstanding these differences, which may in occupy only the deeper, offshore waters of the lake, part reflect phenotypic plasticity, there have been no based on the lack of observations of the ecotype dur- genetic assessments of the status of the Cultus ing shore and tributary sampling (Ricker 1960). Since pygmy sculpin as a valid DU under the discrete and 1970, Fisheries and Oceans Canada (DFO) have cap- significance criteria of COSEWIC. For instance, it is tured Cultus pygmy sculpins during sampling for possible that the 2 forms are part of the same genetic sockeye salmon Oncorhynchus nerka using pelagic population and that the lake form results from disper- trawls in Cultus Lake (J. Hume pers. comm.). It is sal from the stream-spawning habitats of coastrange thought that the Cultus pygmy sculpin undertakes sculpin. Alternatively, the lake form may be a genet- diurnal feeding migrations, following the zooplank- ically discrete population that, coupled with its eco- ton on which it feeds (McPhail 2007). Limnetic life logical specializations, is behaving as a species dis- histories, however, are extremely rare in the Cotti- tinct from coastrange sculpin. This is an important dae. In fact, only 3 species of the 250 or so described unknown because although the Cultus pygmy taxa are wholly limnetic as adults, and these belong sculpin is currently listed by SARA, the status of to 2 highly divergent genera endemic to Lake Baikal COSEWIC DUs and their legal listings are re- in central Siberia (Kontula et al. 2003). assessed at least every 10 yr. Consequently, the con- The Cultus Lake pygmy sculpin is a provincially servation status of any DU may change and the eligi- red-listed species (meaning that it is an indigenous bility of a wildlife species as a DU is one basis on species listed as ‘threatened’ in BC) as its range is which the status may be altered. Further, there have restricted to a single lake that is used intensively: been no detailed studies on this fish since Ricker’s Cultus Lake received 3 million recreational visitors in (1960) original work, and little of its life history is 2009 (Cultus Lake Park Board minutes, September known. A phenotypically similar pelagic form of Cot- Woodruff & Taylor: Distinctiveness of Cultus pygmy sculpin 183 tus aleuticus, however, has been found in Lake monomictic and thermally stratified from May to Washington near Seattle, Washington (USA), about November (Shortreed 2007). The lake is mesotro- 160 km southwest of Cultus Lake (Larson & Brown phic, and there has been an increase in lake tem- 1975). The evolutionary origin of these similar eco- perature over the past 70 yr which has been accom- types, however, is uncertain. This other pelagic panied by an increase in productivity (Shortreed sculpin could share a common ancestor with the Cul- 2007). tus pygmy sculpin or
Load more

Recommended publications
  • Cottus Poecilopus Heckel, 1836, in the River Javorin- Ka, the Tatra
    Oecologia Montana 2018, Cottus poecilopus Heckel, 1836, in the river Javorin- 27, 21-26 ka, the Tatra mountains, Slovakia M. JANIGA, Jr. In Tatranská Javorina under Muráň mountain, a small fish nursery was built by Christian Kraft von Institute of High Mountain Biology University of Hohenlohe around 1930. The most comprehensive Žilina, Tatranská Javorina 7, SK-059 56, Slovakia; studies on fish from the Tatra mountains were writ- e-mail:: [email protected] ten by professor Václav Dyk (1957; 1961), Dyk and Dyková (1964a,b; 1965), who studied altitudinal distribution of fish, describing the highest points where fish were found. His studies on fish were likely the most complex studies of their kind during that period. Along with his wife Sylvia, who illus- Abstract. This study focuses on the Cottus poe- trated his studies, they published the first realistic cilopus from the river Javorinka in the north-east studies on fish from the Tatra mountains including High Tatra mountains, Slovakia. The movement the river Javorinka (Dyk and Dyková 1964a). Feri- and residence of 75 Alpine bullhead in the river anc (1948) published the first Slovakian nomenclature were monitored and carefully recorded using GPS of fish in 1948. Eugen K. Balon (1964; 1966) was the coordinates. A map representing their location in next famous ichthyologist who became a recognised the river was generated. This data was collected in expert in the fish fauna of the streams of the Tatra the spring and summer of 2016 and in the autumn mountains, the river Poprad, and various high moun- of 2017. Body length and body weight of 67 Alpine tain lakes.
    [Show full text]
  • KLMN Featured Creature Sculpins
    National Park Service Featured Creature U.S. Department of the Interior February 2021 Klamath Network Inventory & Monitoring Division Natural Resources Stewardship & Science Sculpins Cottidae General Description Habitat and Distribution Darting low through tide pools or lurking Sculpins occur in both marine and freshwater in stream bottoms, members of the large habitats of North America, Europe, and Asia, fish family, Cottidae, are commonly called with just a few marine species in the southern USFWS/ROGER TABOR sculpins. They also go by “bullhead” or “sea hemisphere. Most abundant in the North Prickly sculpin (Cottus asper) scorpion,” and even some very unflattering Pacific, they tend to frequent shallow water terms, like “double uglies.” You’re not likely and tide pools. In North American coldwa- to catch one on your fishing line, but if you ter streams, they overlap the same habitat as them to keep them oxygenated until they look carefully into ocean tide pools, you trout and salmon, including small headwater hatch a few weeks later into baby fish, known may spot these well camouflaged creatures streams, lakes, and rocky areas of lowland as fry. The fry will be sexually mature in time moving around the bottom. Most of the more rivers. Freshwater sculpin are sometimes the for the next breeding season. than 250–300 known species in this family are only abundant fish species in streams. Inland marine, though some live in freshwater. species found in Pacific Northwest streams Fun Facts include the riffle sculpin (Cottus gulosus), • Some sculpins are able to compress their Generally, sculpins are bottom-dwelling prickly sculpin (Cottus asper), and coastrange skull bones to fit inside small spaces.
    [Show full text]
  • List of Animal Species with Ranks October 2017
    Washington Natural Heritage Program List of Animal Species with Ranks October 2017 The following list of animals known from Washington is complete for resident and transient vertebrates and several groups of invertebrates, including odonates, branchipods, tiger beetles, butterflies, gastropods, freshwater bivalves and bumble bees. Some species from other groups are included, especially where there are conservation concerns. Among these are the Palouse giant earthworm, a few moths and some of our mayflies and grasshoppers. Currently 857 vertebrate and 1,100 invertebrate taxa are included. Conservation status, in the form of range-wide, national and state ranks are assigned to each taxon. Information on species range and distribution, number of individuals, population trends and threats is collected into a ranking form, analyzed, and used to assign ranks. Ranks are updated periodically, as new information is collected. We welcome new information for any species on our list. Common Name Scientific Name Class Global Rank State Rank State Status Federal Status Northwestern Salamander Ambystoma gracile Amphibia G5 S5 Long-toed Salamander Ambystoma macrodactylum Amphibia G5 S5 Tiger Salamander Ambystoma tigrinum Amphibia G5 S3 Ensatina Ensatina eschscholtzii Amphibia G5 S5 Dunn's Salamander Plethodon dunni Amphibia G4 S3 C Larch Mountain Salamander Plethodon larselli Amphibia G3 S3 S Van Dyke's Salamander Plethodon vandykei Amphibia G3 S3 C Western Red-backed Salamander Plethodon vehiculum Amphibia G5 S5 Rough-skinned Newt Taricha granulosa
    [Show full text]
  • Eye Histology of the Tytoona Cave Sculpin: Eye Loss Evolves Slower Than Enhancement of Mandibular Pores in Cavefish?
    McCaffery et al. Eye histology of the Tytoona Cave Sculpin: Eye loss evolves slower than enhancement of mandibular pores in cavefish? Sean McCaffery1, Emily Collins2 and Luis Espinasa3 School of Science, Marist College, 3399 North Rd, Poughkeepsie, New York 12601, USA 1 [email protected] 2 [email protected] [email protected] (corresponding author) Key Words: Cottus bairdi, Cottus cognatus, Cottidae, Scorpaeniformes, Actinopterygii, Tytoona Cave Nature Preserve, Sinking Valley, Blair County, Pennsylvania, troglobite, eye histology, mandibular pore. Despite the presence of caves in northern latitudes above 40–50ºN that would typically be considered suitable environments for cave-adapted fish, stygobiotic fish are absent from these locations (Romero and Paulsen 2001; Proudlove 2001). One factor that likely hindered the distribution of cavefish in these areas was the migration of polar ice sheets during the Wisconsinan Period, which occurred approximately 20,000 years ago. The glaciers covered the majority of the Northern Hemisphere until about 12,000 years ago, making many caves in the region uninhabitable for fish until the period ended (Flint 1971). Presently, the northernmost cave-adapted fish in the world is the Nippenose Cave Sculpin of the Cottus bairdi-cognatus complex (Espinasa and Jeffery 2003) (Actinopterygii: Scorpaeniformes: Cottidae), found at 41º 9’ N, in caves of the Nippenose Valley, in Lycoming County, Central Pennsylvania. In some taxonomic databases and the genetic data repository GenBank, this taxon referred to as Cottus sp. 'Nippenose Valley' (Pennsylvania Grotto Sculpin). Here, we discuss a second population different from Nippenose Cave Sculpin. We refer to this population from Tytoona Cave, Pennsylvania, as the Tytoona Cave Scuplin.
    [Show full text]
  • This Document Was Withdrawn on 6 November 2017
    2017. November 6 on understanding withdrawn was water for wildlife document This Water resources and conservation: the eco-hydrological requirements of habitats and species Assessing We are the Environment Agency. It’s our job to look after your 2017. environment and make it a better place – for you, and for future generations. Your environment is the air you breathe, the water you drink and the ground you walk on. Working with business, Government and society as a whole, we are makingNovember your environment cleaner and healthier. 6 The Environment Agency. Out there, makingon your environment a better place. withdrawn was Published by: Environment Agency Rio House Waterside Drive, Aztec West Almondsbury, Bristol BS32 4UD Tel: 0870document 8506506 Email: [email protected] www.environment-agency.gov.uk This© Environment Agency All rights reserved. This document may be reproduced with prior permission of the Environment Agency. April 2007 Contents Brief summary 1. Introduction 2017. 2. Species and habitats 2.2.1 Coastal and halophytic habitats 2.2.2 Freshwater habitats 2.2.3 Temperate heath, scrub and grasslands 2.2.4 Raised bogs, fens, mires, alluvial forests and bog woodland November 2.3.1 Invertebrates 6 2.3.2 Fish and amphibians 2.3.3 Mammals on 2.3.4 Plants 2.3.5 Birds 3. Hydro-ecological domains and hydrological regimes 4 Assessment methods withdrawn 5. Case studies was 6. References 7. Glossary of abbreviations document This Environment Agency in partnership with Natural England and Countryside Council for Wales Understanding water for wildlife Contents Brief summary The Restoring Sustainable Abstraction (RSA) Programme was set up by the Environment Agency in 1999 to identify and catalogue2017.
    [Show full text]
  • Distribution, Abundance, and Genetic Population Structure of Wood River Sculpin, Cottus Leiopomus
    Western North American Naturalist Volume 68 Number 4 Article 10 12-31-2008 Distribution, abundance, and genetic population structure of Wood River sculpin, Cottus leiopomus Kevin A. Meyer Idaho Department of Fish and Game, Nampa, Idaho, [email protected] Daniel J. Schill Idaho Department of Fish and Game, Eagle, Idaho, [email protected] Matthew R. Campbell Idaho Department of Fish and Game, Eagle, Idaho, [email protected] Christine C. Kozfkay Idaho Department of Fish and Game, Eagle, Idaho, [email protected] Follow this and additional works at: https://scholarsarchive.byu.edu/wnan Recommended Citation Meyer, Kevin A.; Schill, Daniel J.; Campbell, Matthew R.; and Kozfkay, Christine C. (2008) "Distribution, abundance, and genetic population structure of Wood River sculpin, Cottus leiopomus," Western North American Naturalist: Vol. 68 : No. 4 , Article 10. Available at: https://scholarsarchive.byu.edu/wnan/vol68/iss4/10 This Article is brought to you for free and open access by the Western North American Naturalist Publications at BYU ScholarsArchive. It has been accepted for inclusion in Western North American Naturalist by an authorized editor of BYU ScholarsArchive. For more information, please contact [email protected], [email protected]. Western North American Naturalist 68(4), © 2008, pp. 508–520 DISTRIBUTION, ABUNDANCE, AND GENETIC POPULATION STRUCTURE OF WOOD RIVER SCULPIN, COTTUS LEIOPOMUS Kevin A. Meyer1,3, Daniel J. Schill1, Matthew R. Campbell2, and Christine C. Kozfkay2 ABSTRACT.—The Wood River sculpin Cottus leiopomus is endemic to the Wood River Basin in central Idaho and is a nongame species of concern because of its limited distribution. However, status and genetic population structure, 2 factors often central to the conservation and management of species of concern, have not been assessed for this species.
    [Show full text]
  • Endangered Species
    FEATURE: ENDANGERED SPECIES Conservation Status of Imperiled North American Freshwater and Diadromous Fishes ABSTRACT: This is the third compilation of imperiled (i.e., endangered, threatened, vulnerable) plus extinct freshwater and diadromous fishes of North America prepared by the American Fisheries Society’s Endangered Species Committee. Since the last revision in 1989, imperilment of inland fishes has increased substantially. This list includes 700 extant taxa representing 133 genera and 36 families, a 92% increase over the 364 listed in 1989. The increase reflects the addition of distinct populations, previously non-imperiled fishes, and recently described or discovered taxa. Approximately 39% of described fish species of the continent are imperiled. There are 230 vulnerable, 190 threatened, and 280 endangered extant taxa, and 61 taxa presumed extinct or extirpated from nature. Of those that were imperiled in 1989, most (89%) are the same or worse in conservation status; only 6% have improved in status, and 5% were delisted for various reasons. Habitat degradation and nonindigenous species are the main threats to at-risk fishes, many of which are restricted to small ranges. Documenting the diversity and status of rare fishes is a critical step in identifying and implementing appropriate actions necessary for their protection and management. Howard L. Jelks, Frank McCormick, Stephen J. Walsh, Joseph S. Nelson, Noel M. Burkhead, Steven P. Platania, Salvador Contreras-Balderas, Brady A. Porter, Edmundo Díaz-Pardo, Claude B. Renaud, Dean A. Hendrickson, Juan Jacobo Schmitter-Soto, John Lyons, Eric B. Taylor, and Nicholas E. Mandrak, Melvin L. Warren, Jr. Jelks, Walsh, and Burkhead are research McCormick is a biologist with the biologists with the U.S.
    [Show full text]
  • Predation of Juvenile Chinook Salmon by Predatory Fishes in Three Areas of the Lake Washington Basin
    PREDATION OF JUVENILE CHINOOK SALMON BY PREDATORY FISHES IN THREE AREAS OF THE LAKE WASHINGTON BASIN Roger A. Tabor, Mark T. Celedonia, Francine Mejia1, Rich M. Piaskowski2, David L. Low3, U.S. Fish and Wildlife Service Western Washington Fish and Wildlife Office Fisheries Division 510 Desmond Drive SE, Suite 102 Lacey, Washington 98513 Brian Footen, Muckleshoot Indian Tribe 39015 172nd Avenue SE Auburn, Washington 98092 and Linda Park, NOAA Fisheries Northwest Fisheries Science Center Conservation Biology Molecular Genetics Laboratory 2725 Montlake Blvd. E. Seattle, Washington 98112 February 2004 1Present address: U.S. Geological Survey, 6924 Tremont Road, Dixon, California 95620 2Present address: Bureau of Reclamation, 6600 Washburn Way, Klamath Falls, Oregon 97603 3Present address: Washington Department of Fish and Wildlife, Olympia, Washington 98501 SUMMARY Previous predator sampling of the Lake Washington system focused on predation of sockeye salmon (Oncorhynchus nerka) and little effort was given to quantify predation of Chinook salmon (O. tshawytscha). In 1999 and 2000, we sampled various fish species to better understand the effect that predation has on Chinook salmon populations. Additionally, we reviewed existing data to get a more complete picture of predation. We collected predators in three areas of the Lake Washington basin where juvenile Chinook salmon may be particularly vulnerable to predatory fishes. Two of these areas, the Cedar River and the south end of Lake Washington are important rearing areas. In these areas, Chinook salmon may be vulnerable because they are small and are present for a relatively long period of time. The other study area, Lake Washington Ship Canal (LWSC; includes Portage Bay, Lake Union, Fremont Cut, and Salmon Bay), is a narrow migratory corridor where Chinook salmon smolts are concentrated during their emigration to Puget Sound.
    [Show full text]
  • Humboldt Bay Fishes
    Humboldt Bay Fishes ><((((º>`·._ .·´¯`·. _ .·´¯`·. ><((((º> ·´¯`·._.·´¯`·.. ><((((º>`·._ .·´¯`·. _ .·´¯`·. ><((((º> Acknowledgements The Humboldt Bay Harbor District would like to offer our sincere thanks and appreciation to the authors and photographers who have allowed us to use their work in this report. Photography and Illustrations We would like to thank the photographers and illustrators who have so graciously donated the use of their images for this publication. Andrey Dolgor Dan Gotshall Polar Research Institute of Marine Sea Challengers, Inc. Fisheries And Oceanography [email protected] [email protected] Michael Lanboeuf Milton Love [email protected] Marine Science Institute [email protected] Stephen Metherell Jacques Moreau [email protected] [email protected] Bernd Ueberschaer Clinton Bauder [email protected] [email protected] Fish descriptions contained in this report are from: Froese, R. and Pauly, D. Editors. 2003 FishBase. Worldwide Web electronic publication. http://www.fishbase.org/ 13 August 2003 Photographer Fish Photographer Bauder, Clinton wolf-eel Gotshall, Daniel W scalyhead sculpin Bauder, Clinton blackeye goby Gotshall, Daniel W speckled sanddab Bauder, Clinton spotted cusk-eel Gotshall, Daniel W. bocaccio Bauder, Clinton tube-snout Gotshall, Daniel W. brown rockfish Gotshall, Daniel W. yellowtail rockfish Flescher, Don american shad Gotshall, Daniel W. dover sole Flescher, Don stripped bass Gotshall, Daniel W. pacific sanddab Gotshall, Daniel W. kelp greenling Garcia-Franco, Mauricio louvar
    [Show full text]
  • Speckled Dace, Rhinichthys Osculus, in Canada, Prepared Under Contract with Environment and Climate Change Canada
    COSEWIC Assessment and Status Report on the Speckled Dace Rhinichthys osculus in Canada ENDANGERED 2016 COSEWIC status reports are working documents used in assigning the status of wildlife species suspected of being at risk. This report may be cited as follows: COSEWIC. 2016. COSEWIC assessment and status report on the Speckled Dace Rhinichthys osculus in Canada. Committee on the Status of Endangered Wildlife in Canada. Ottawa. xi + 51 pp. (http://www.registrelep-sararegistry.gc.ca/default.asp?lang=en&n=24F7211B-1). Previous report(s): COSEWIC 2006. COSEWIC assessment and update status report on the speckled dace Rhinichthys osculus in Canada. Committee on the Status of Endangered Wildlife in Canada. Ottawa. vi + 27 pp. (www.sararegistry.gc.ca/status/status_e.cfm). COSEWIC 2002. COSEWIC assessment and update status report on the speckled dace Rhinichthys osculus in Canada. Committee on the Status of Endangered Wildlife in Canada. Ottawa. vi + 36 pp. (www.sararegistry.gc.ca/status/status_e.cfm). Peden, A. 2002. COSEWIC assessment and update status report on the speckled dace Rhinichthys osculus in Canada, in COSEWIC assessment and update status report on the speckled dace Rhinichthys osculus in Canada. Committee on the Status of Endangered Wildlife in Canada. Ottawa. 1-36 pp. Peden, A.E. 1980. COSEWIC status report on the speckled dace Rhinichthys osculus in Canada. Committee on the Status of Endangered Wildlife in Canada. 1-13 pp. Production note: COSEWIC would like to acknowledge Andrea Smith (Hutchinson Environmental Sciences Ltd.) for writing the status report on the Speckled Dace, Rhinichthys osculus, in Canada, prepared under contract with Environment and Climate Change Canada.
    [Show full text]
  • Identification of Critical Habitat for Coastrange Sculpin (Cultus Population) (Cottus Aleuticus)
    Canadian Science Advisory Secretariat (CSAS) Research Document 2015/033 Pacific Region Identification of critical habitat for Coastrange Sculpin (Cultus Population) (Cottus aleuticus) 1 2 2 2 3 Eric Chiang , Lucas Pon , Daniel T. Selbie , Jeremy M.B. Hume , Patricia Woodruff , and Gerrit Velema3 1Fisheries and Oceans Canada Science Branch Suite 200, 401 West Pender St Vancouver, BC V6C 3S4 2Fisheries and Oceans Canada Cultus Lake Salmon Research Laboratory 4222 Columbia Valley Rd Cultus Lake, BC V2R 5B6 3University of British Columbia Department of Zoology 2329 West Mall Vancouver, BC V6T 1Z4 June 2015 Foreword This series documents the scientific basis for the evaluation of aquatic resources and ecosystems in Canada. As such, it addresses the issues of the day in the time frames required and the documents it contains are not intended as definitive statements on the subjects addressed but rather as progress reports on ongoing investigations. Research documents are produced in the official language in which they are provided to the Secretariat. Published by: Fisheries and Oceans Canada Canadian Science Advisory Secretariat 200 Kent Street Ottawa ON K1A 0E6 http://www.dfo-mpo.gc.ca/csas-sccs/ [email protected] © Her Majesty the Queen in Right of Canada, 2015 ISSN 1919-5044 Correct citation for this publication: Chiang, E., Pon, L., Selbie, D.T.,Hume, J.M.B., Woodruff, P., and Velema, G. 2015. Identification of critical habitat for Coastrange Sculpin (Cultus Population) (Cottus aleuticus). DFO Can. Sci. Advis. Sec. Res. Doc. 2015/033.
    [Show full text]
  • Phenology and Diversity of Adult Stoneflies (Plecoptera) of a Small Coastal Stream, California
    Bottorff, Richard L., Loren D. Bottorff, 2007. Phenology and diversity of adult stoneflies (Plecoptera) of a small coastal stream, California. Illiesia, 3(1):1‐9. Available online: http://www2.pms‐lj.si/illiesia/Illiesia03‐01.pdf PHENOLOGY AND DIVERSITY OF ADULT STONEFLIES (PLECOPTERA) OF A SMALL COASTAL STREAM, CALIFORNIA Richard L. Bottorff1 and Loren D. Bottorff 2 11963 Toppewetah Street, South Lake Tahoe, CA 96150, E‐mail: [email protected] 23265 Sandhurst Court, Cameron Park, CA 95682, E‐mail: [email protected] ABSTRACT Collections of adult stoneflies over a full year at Irish Gulch Creek, Mendocino Co., California, revealed 23 species. Adults were present at all times of the year. Species number varied from an autumnal low of 2 to a spring peak of 13. Adults of most species were present for less than 3 months, but Malenka depressa adults were present year‐round. Hesperoperla hoguei was the only strictly autumnal‐emerging species. The report of Suwallia dubia from Irish Gulch Creek represents a new California record. The stonefly faunas of Irish Gulch Creek (low coastal) and Sagehen Creek (high Sierra Nevada) were compared. Both creeks had similar numbers of species, but the species composition differed greatly, reflecting dissimilar environments (elevation, water temperature, thermal accumulation, and discharge). Irish Gulch Creek had uniform warmer temperatures; Sagehen Creek had variable colder temperatures. Peak emergence at Irish Gulch Creek occurred 2 months earlier than at Sagehen Creek. Keywords: Plecoptera, seasonal flight period, biodiversity, thermal stability, North Coast bioregion INTRODUCTION we studied these aspects for a small stream on the As might be expected from its varied topography, north coast of California.
    [Show full text]