Status of the Great Plains Toad (Bufo [Anaxyrus] Cognatus) in Alberta: Update 2009
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Status of the Great Plains Toad (Bufo [Anaxyrus] cognatus) in Alberta:
Update 2009
Alberta Wildlife Status Report No. 14 (Update 2009) Status of the Great Plains Toad (Bufo [Anaxyrus] cognatus) in Alberta:
Update 2009
Prepared for: Alberta Sustainable Resource Development (ASRD) Alberta Conservation Association (ACA)
Update prepared by: Kimberly J. Pearson Much of the original work contained in the report was prepared by Janice D. James in 1998. This report has been reviewed, revised, and edited prior to publication. It is an ASRD/ACA working document that will be revised and updated periodically.
Alberta Wildlife Status Report No. 14 (Update 2009)
December 2009
Published By:
i Publication No. T/220 ISBN: 978-0-7785-8889-4 (Printed Edition) ISBN: 978-0-7785-8890-0 (On-line Edition) ISSN: 1206-4912 (Printed Edition) ISSN: 1499-4682 (On-line Edition)
Series Editors: Sue Peters, Robin Gutsell and Gavin Berg Illustrations: Brian Huffman Maps: Velma Hudson
For copies of this report, visit our web site at: http://srd.alberta.ca/BioDiversityStewardship/SpeciesAtRisk/ and click on “Detailed Status”
OR
Contact: Information Centre - Publications Alberta Sustainable Resource Development Main Floor, Great West Life Building 9920 - 108 Street Edmonton, Alberta, Canada T5K 2M4
Telephone: (780) 944-0313 or 1-877-944-0313
This publication may be cited as:
Alberta Sustainable Resource Development and Alberta Conservation Association. 2009. Status of the Great Plains Toad (Bufo [Anaxyrus] cognatus) in Alberta: Update 2009. Alberta Sustainable Resource Development. Wildlife Status Report No. 14 (Update 2009). Edmonton, AB. 25 pp.
ii PREFACE
(YHU\¿YH\HDUVWKH)LVKDQG:LOGOLIH'LYLVLRQRI$OEHUWD6XVWDLQDEOH5HVRXUFH'HYHORSPHQW reviews the general status of wildlife species in Alberta. These overviews, which have been conducted in 1991 (The Status of Alberta Wildlife), 1996 (The Status of Alberta Wildlife), 2000 (The General Status of Alberta Wild Species 2000), and 2005 (The General Status of Alberta Wild Species 2005 DVVLJQLQGLYLGXDOVSHFLHV³UDQNV´WKDWUHÀHFWWKHSHUFHLYHGOHYHORIULVNWRSRSXODWLRQV that occur in the province. Such designations are determined from extensive consultations with professional and amateur biologists, and from a variety of readily available sources of population data. A key objective of these reviews is to identify species that may be considered for more detailed status determinations.
The Alberta Wildlife Status Report Series is an extension of the general status exercise, and provides comprehensive current summaries of the biological status of selected wildlife species in Alberta. Priority is given to species that are At Risk or May Be At Risk in the province, that are of uncertain status (Undetermined), or that are considered to be at risk at a national level by the Committee on the Status of Endangered Wildlife in Canada (COSEWIC).
Reports in this series are published and distributed by the Alberta Conservation Association and the Fish and Wildlife Division of Alberta Sustainable Resource Development. They are intended to provide detailed and up-to-date information that will be useful to resource professionals for managing populations of species and their habitats in the province. The reports are also designed to provide current information that will assist Alberta’s Endangered Species Conservation Committee in identifying species that may be formally designated as Endangered or Threatened under Alberta’s Wildlife Act. To achieve these goals, the reports have been authored and/or reviewed by individuals with unique local expertise in the biology and management of each species.
iii EXECUTIVE SUMMARY
The 1998 review of the status of the Great Plains toad (Bufo [Anaxyrus] cognatus) in Alberta resulted in the species’ designation as 'DWD 'H¿FLHQW. The General Status of Alberta Wild Species 2005 ranks the species as May Be At Risk and the Committee on the Status of Endangered Wildlife in Canada (COSEWIC) designates the Great Plains toad as a species of Special Concern in Canada. This report reviews current information on the Great Plains toad in Alberta as a step towards updating its provincial status.
The Great Plains toad prefers ephemeral, clear, shallow ponds within areas of sandy soil in the mixed grasslands of southeastern Alberta, which is the northwestern extreme of the species’ global range. The majority of the species’ approximately 10-year lifespan is spent burrowed XQGHUJURXQGLQXSODQGKDELWDWVDQGWKH\DUHWKXVYHU\GLI¿FXOWWRGHWHFW0RVWRIWKHVSHFLHV¶ occurrences have been recorded during high spring precipitation events, which initiate breeding activity.
Based on data available to 2008 and the locations of preferred sand hill and sand plain habitats and less suitable cultivated areas, six general Great Plains toad populations appear to exist within Alberta. The largest of these extends south from Empress to Medicine Hat. Others are located in the Many Island Lake/Walsh, Wrentham/Skiff, Onefour, Tilley/Bow City/Rolling Hills, and Hays/Taber/Grassy Lake areas.
Despite severe drought conditions in southern Alberta during the early 2000s, many apparently QHZ*UHDW3ODLQVWRDGRFFXUUHQFHVZHUHLGHQWL¿HGEHWZHHQ DQGEHFDXVHRIKHDY\ rainfall events in 2000, 2005, and 2006. Given a lack of long-term, consistent, and standardized monitoring, estimating Alberta’s Great Plains toad population size and trends can only be done roughly. Unfortunately, no null survey data are available to clarify where the Great Plains toad has been searched for but not found. However, based on available data, it is estimated that approximately 2100 to 10 000 Great Plains toads inhabit Alberta. Given the considerable degree of habitat loss and disturbance as a result of cultivation of sandy soil areas for agriculture, oil and gas developments, and other developments, the species has likely been experiencing a downward population trend in Alberta. To monitor the species for conservation purposes, long-term, repeat surveys should occur, and null survey data must be collected and managed appropriately.
6HYHUDODQWKURSRJHQLFLQÀXHQFHVVXFKDVK\GURORJLFFKDQJHVKDELWDWDOWHUDWLRQDQGGHVWUXFWLRQ pesticides, roadway mortality, oil and gas exploration and development, and increasing rates of amphibian disease combine with natural climatic and predation impacts to threaten the long-term viability of the Great Plains toad population in Alberta. Aside from several surveys for Great 3ODLQVWRDGSUHVHQFHQRVSHFLHVVSHFL¿FPDQDJHPHQWRUUHVHDUFKKDVWDNHQSODFHLQWKHSURYLQFH WRGDWH7KHVSHFLHV¶DSSDUHQWO\VPDOOSRSXODWLRQOLPLWHGGLVWULEXWLRQGLI¿FXOW\RIGHWHFWLRQ and the development and disturbance of native habitats warrant cautious consideration to ensure the long-term conservation of the Great Plains toad in Alberta.
iv ACKNOWLEDGEMENTS
For the original 1998 report prepared by Janice D. James: Many thanks are due to Cliff Wallis (Cottonwood Consultants), Cleve Wershler (Sweetgrass Consultants), and James Krupa (University of Kentucky) for helpful information and comments. I am indebted to Tony Russell and Larry Powell of the University of Calgary for information and many helpful suggestions. As well, thanks are due to Andy Didiuk (Canadian Wildlife Service, Saskatoon) for his location data and useful comments. The information provided by Jonathan Wright (Calgary) was also greatly appreciated. Special thanks must also go out to Dave Prescott (Alberta Conservation Association) and Lisa Takats (Alberta Amphibian Monitoring Program) for much needed information and locations. I am also obliged to Rick Lauzon (Axys Environmental Protection) who kindly provided additional site records and observational information. Thanks also to Leo Dube (Alberta Environmental Protection, Lethbridge) for his help with information and to Kasy Kaczanowski of Ducks Unlimited (Brooks) for comments on that organization’s policy concerning these amphibians.
Preparation of this report was funded by the Alberta Conservation Association.
For the 2009 update prepared by Kimberly J. Pearson: Thanks to John Acorn (University of Alberta), Lorna Allen (Alberta Natural Heritage Information &HQWUH 'HODQH\%R\G &DQDGLDQ)RUFHV%DVH6XI¿HOG &RQQLH%URZQH 8QLYHUVLW\RI$OEHUWD Doug Collister (Accipiter Ecological Services), Andy Didiuk (Canadian Wildlife Service, Saskatoon), Chris Fisher (independent consultant), Cam Goater (University of Lethbridge), Nathan Gregory (Dillon Consulting Limited), Laura Hamilton (University of Alberta), Sherry Hohn (Ghostpine Environmental Services Ltd.), Kris Kendell (Alberta Conservation Association [ACA]), Tammy MacMillan (Tera Environmental), Rick Martin (Eastern Irrigation District), %HQMDPLQ0F:LOOLDPV &DQDGLDQ)RUFHV%DVH6XI¿HOG -XOLH3LHUFH 'XFNV8QOLPLWHG&DQDGD Dave Prescott (Alberta Sustainable Resource Development [ASRD], Fish and Wildlife Division), :HV5LFKPRQG &DQDGLDQ)RUFHV%DVH6XI¿HOG 7RQ\5XVVHOO 8QLYHUVLW\RI&DOJDU\ 0HOLVVD Sawchuk (Tera Environmental), Dave Scobie (Avocet Environmental Inc.), Deanna Olson (US Department of Agriculture Forest Service), John Taggart (ASRD, Fish and Wildlife Division), Jonathan Thompson (Ducks Unlimited Canada), Richard Quinlan (ASRD, Fish and Wildlife Division), Greg Wagner (Iris Environmental Systems Inc.), and Cleve Wershler (Sweetgrass Consultants), for providing comments and resources relevant to the 2009 update.
Thanks also to Sue Peters (ACA), Kris Kendell (ACA), Janice James (contracted researcher), Joel Nicholson (ASRD, Fish and Wildlife Division), Gavin Berg (ASRD, Fish and Wildlife Division), and Robin Gutsell (ASRD, Fish and Wildlife Division) for providing comments on the draft update report, and to Stephen Hamilton (ACA) and Velma Hudson (ACA) for providing mapping services.
Preparation of this report was funded by the Alberta Conservation Association and the Fish and Wildlife Division of Alberta Sustainable Resource Development.
v TABLE OF CONTENTS
PREFACE ...... iii
EXECUTIVE SUMMARY...... iv
ACKNOWLEDGEMENTS...... v
INTRODUCTION ...... 1
SPECIES TAXONOMY...... 1
HABITAT...... 1
CONSERVATION BIOLOGY...... 3
1. Appearance...... 3
2. Activity Patterns...... 4
3. Reproduction...... 4
4. Dispersal/Movement...... 5
5. Survival...... 5
DISTRIBUTION...... 6
1. Alberta...... 6
2. Other Areas ...... 8
POPULATION SIZE AND TRENDS ...... 8
1. Alberta...... 8
2. Other Areas ...... 10
LIMITING FACTORS...... 11
1. Hydrologic Changes ...... 11
2. Habitat Alteration and Destruction ...... 11
3. Pesticides...... 12
4. Predation ...... 13
5. Roadway Mortality ...... 13
vii TABLE OF CONTENTS continued:
6. Oil and Gas Exploration and Development ...... 13
7. Disease ...... 14
STATUS DESIGNATIONS ...... 15
1. Alberta...... 15
2. Other Areas ...... 15
RECENT MANAGEMENT IN ALBERTA...... 16
SYNTHESIS...... 16
LITERATURE CITED...... 18
$SSHQGL['H¿QLWLRQVRIVWDWXVUDQNVDQGOHJDOGHVLJQDWLRQV ...... 24
LIST OF FIGURES
Figure 1 Known distribution of the Great Plains toad in Alberta, including observations made prior to 1998, and from 1998 to 2008 ...... 7
Figure 2 North American distribution of the Great Plains toad (adapted from Krupa 1994)...... 9
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Appendix 1. Definitions of status ranks and legal designations.
A. The General Status of Alberta Wild Species 2005 (after Alberta Sustainable Resource Development 2007)
2005 Rank 1996 Rank Definitions At Risk Red Any species known to be At Risk after formal detailed status assessment and designation as Endangered or Threatened in Alberta. May Be At Risk Blue Any species that may be at risk of extinction or extirpation, and is therefore a candidate for detailed risk assessment. Sensitive Yellow Any species that is not at risk of extinction or extirpation but may require special attention or protection to prevent it from becoming at risk. Secure Green Any species that is not At Risk, May Be At Risk or Sensitive. Undetermined Status Any species for which insufficient information, knowledge or data Undetermined is available to reliably evaluate its general status. Not Assessed n/a Any species that has not been examined during this exercise. Exotic/Alien n/a Any species that has been introduced as a result of human activities. Extirpated/Extinct n/a Any species no longer thought to be present in Alberta (Extirpated) or no longer believed to be present anywhere in the world (Extinct). Accidental/Vagrant n/a Any species occurring infrequently and unpredictably in Alberta, i.e., outside its usual range.
B. Alberta Species at Risk Formal Status Designations Species designated as EndangeredXQGHU$OEHUWD¶VWildlife Act include those listed as Endangered or Threatened in the Wildlife Regulation (in bold).
Endangered A species facing imminent extirpation or extinction. Threatened A species likely to become endangered if limiting factors are not reversed. Species of A species of special concern because of characteristics that make it particularly sensitive to Special Concern human activities or natural events. Data Deficient A species for which there is insufficient scientific information to support status designation.
C. Committee on the Status of Endangered Wildlife in Canada (after COSEWIC 2009)
Extinct A species that no longer exists. Extirpated A species that no longer exists in the wild in Canada, but occurs elsewhere. Endangered A species facing imminent extirpation or extinction. Threatened A species that is likely to become endangered if nothing is done to reverse the factors leading to its extirpation or extinction. Special Concern A species that may become threatened or endangered because of a combination of biological characteristics and identified threats. Not at Risk A species that has been evaluated and found to be not at risk of extinction given the current circumstances. Data Deficient A category that applies when the available information is insufficient to (a) resolve a wildlife species' eligibility for assessment, or (b) permit an assessment of the wildlife species' risk of extinction.
Appendix 1 continued:
D. Heritage Status Ranks: Global (G), National (N), Subnational (S) (after Alberta Natural Heritage Information Centre 2007, NatureServe 2009)
G1/N1/S1 5 or fewer occurrences or only a few remaining individuals. May be especially vulnerable to extirpation because of some factor of its biology. G2/N2/S2 6 to 20 or fewer occurrences or with many individuals in fewer locations. May be especially vulnerable to extirpation because of some factor of its biology. G3/N3/S3 21 to 100 occurrences; may be rare and local throughout its range, or in a restricted range (may be abundant in some locations). May be susceptible to extirpation because of large- scale disturbances. G4/N4/S4 Typically > 100 occurrences. Apparently secure. G5/N5/S5 Typically > 100 occurrences. Demonstrably secure. GX/NX/SX Believed to be extinct or extirpated; historical records only. GH/NH/SH Historically known; may be relocated in the future. G?/N?/S? Not yet ranked, or rank tentatively assigned.
E. United States Endangered Species Act (after National Research Council 1995)
Endangered Any species that is in danger of extinction throughout all or a significant portion of its range. Threatened Any species that is likely to become an endangered species within the foreseeable future throughout all or a significant portion of its range.
List of Titles in This Series (as of December 2009)
No. 1 Status of the Piping Plover (Charadrius melodus) in Alberta, by David R. C. Prescott. 19 pp. (1997)
No. 2 Status of the Wolverine (Gulo gulo) in Alberta, by Stephen Petersen. 17 pp. (1997)
No. 3 Status of the Northern Long-eared Bat (Myotis septentrionalis) in Alberta, by M. Carolina Caceres and M. J. Pybus. 19 pp. (1997)
No. 3 Update 2009. Status of the Northern Myotis (Myotis septentrionalis) in Alberta. Alberta Sustainable Resource Development and Alberta Conservation Association. 34 pp. (2009)
No. 4 Status of the Ord’s Kangaroo Rat (Dipodomys ordii) in Alberta, by David L. Gummer. 16 pp. (1997)
No. 5 Status of the Eastern Short-horned Lizard (Phrynosoma douglassii brevirostre) in Alberta, by Janice D. James, Anthony P. Russell and G. Lawrence Powell. 20 pp. (1997)
No. 5 Update 2004. Status of the Short-horned Lizard (Phrynosoma hernandesi) in Alberta. Alberta Sustainable Resource Development. 27 pp. (2004)
No. 6 Status of the Prairie Rattlesnake (Crotalus viridis viridis) in Alberta, by Sheri M. Watson and Anthony P. Russell. 26 pp. (1997)
No. 7 Status of the Swift Fox (Vulpes velox) in Alberta, by Susan E. Cotterill. 17 pp. (1997)
No. 8 Status of the Peregrine Falcon (Falco peregrinus anatum) in Alberta, by Petra Rowell and David P. Stepnisky. 23 pp. (1997)
No. 9 Status of the Northern Leopard Frog (Rana pipiens) in Alberta, by Greg Wagner. 46 pp. (1997)
No. 9 Update 2003. Status of the Northern Leopard Frog (Rana pipiens) in Alberta. Alberta Sustainable Resource Development. 61 pp. (2003)
No. 10 Status of the Sprague’s Pipit (Anthus spragueii) in Alberta, by David R. C. Prescott. 14 pp. (1997)
No. 11 Status of the Burrowing Owl (Speotyto cunicularia hypugaea) in Alberta, by Troy I. Wellicome. 21 pp. (1997)
No. 11 Update 2005. Status of the Burrowing Owl (Athene cunicularia) in Alberta. Alberta Sustainable Resource Development and Alberta Conservation Association. 28 pp. (2005)
No. 12 Status of the Canadian Toad (Bufo hemiophrys) in Alberta, by Ian M. Hamilton, Joann L. Skilnick, Howard Troughton, Anthony P. Russell, and G. Lawrence Powell. 30 pp. (1998)
No. 13 Status of the Sage Grouse (Centrocercus urophasianus urophasianus) in Alberta, by Cameron L. Aldridge. 23 pp. (1998)
No. 14 Status of the Great Plains Toad (Bufo cognatus) in Alberta, by Janice D. James. 26 pp. (1998)
No. 14 Update 2009. Status of the Great Plains Toad (Bufo [Anaxyrus] cognatus) in Alberta. Alberta Sustainable Resource Development and Alberta Conservation Association. 25 pp. (2009)
No. 15 Status of the Plains Hognose Snake (Heterodon nasicus nasicus) in Alberta, by Jonathan Wright and Andrew Didiuk. 26 pp. (1998) No. 16 Status of the Long-billed Curlew (Numenius americanus) in Alberta, by Dorothy P. Hill. 20 pp. (1998)
No. 17 Status of the Columbia Spotted Frog (Rana luteiventris) in Alberta, by Janice D. James. 21 pp. (1998)
No. 18 Status of the Ferruginous Hawk (Buteo regalis) in Alberta, by Josef K. Schmutz. 18 pp. (1999)
No. 18 Update 2006. Status of the Ferruginous Hawk (Buteo regalis) in Alberta. Alberta Sustainable Resource Development and Alberta Conservation Association. 22 pp. (2006)
No. 19 Status of the Red-tailed Chipmunk (7DPLDVUX¿FDXGXV) in Alberta, by Ron Bennett. 15 pp. (1999)
No. 20 Status of the Northern Pygmy Owl (Glaucidium gnoma californicum) in Alberta, by Kevin C. Hannah. 20 pp. (1999)
No. 21 Status of the Western Blue Flag (Iris missouriensis) in Alberta, by Joyce Gould. 22 pp. (1999)
No. 21 Update 2005. Status of the Western Blue Flag (Iris missouriensis) in Alberta. Alberta Sustainable Resource Development and Alberta Conservation Association. 29 pp. (2005)
No. 22 Status of the Long-toed Salamander (Ambystoma macrodactylum) in Alberta, by Karen L. Graham and G. Lawrence Powell. 19 pp. (1999)
No. 23 Status of the Black-throated Green Warbler (Dendroica virens) in Alberta, by Michael R. Norton. 24 pp. (1999)
No. 24 Status of the Loggerhead Shrike (Lanius ludovicianus) in Alberta, by David R. C. Prescott and Ronald R. Bjorge. 28 pp. (1999)
No. 25 Status of the Plains Spadefoot (Spea bombifrons) in Alberta, by Richard D. Lauzon. 17 pp. (1999)
No. 26 Status of the Trumpeter Swan (Cygnus buccinator) in Alberta, by M. Lynne James. 21 pp. (2000)
1R 6WDWXVRIWKH3\JP\:KLWH¿VK Prosopium coulteri) in Alberta, by William C. Mackay. 16 pp. (2000)
No. 28 Status of the Short-eared Owl ($VLRÀDPPHXV) in Alberta, by Kort M. Clayton. 15 pp. (2000)
No. 29 Status of the Willow Flycatcher (Empidonax traillii) in Alberta, by Bryan Kulba and W. Bruce McGillivray. 15 pp. (2001)
No. 30 Status of the Woodland Caribou (Rangifer tarandus caribou) in Alberta, by Elston Dzus. 47 pp. (2001)
No. 31 Status of the Western Spiderwort (Tradescantia occidentalis) in Alberta, by Bonnie Smith. 12 pp. (2001)
No. 32 Status of the Bay-breasted Warbler (Dendroica castanea) in Alberta, by Michael Norton. 21 pp. (2001)
No. 33 Status of the Cape May Warbler (Dendroica tigrina) in Alberta, by Michael Norton. 20 pp. (2001)
No. 34 Status of the Whooping Crane (Grus americana) in Alberta, by Jennifer L. White. 21 pp. (2001)
No. 35 Status of Soapweed (Yucca glauca) in Alberta, by Donna Hurlburt. 18 pp. (2001)
No. 36 Status of the Harlequin Duck (Histrionicus histrionicus) in Alberta, by Beth MacCallum. 38 pp. (2001)
No. 37 Status of the Grizzly Bear (Ursus arctos) in Alberta, by John L. Kansas. 43 pp. (2002) No. 38 Status of the Wood Bison (Bison bison athabascae) in Alberta, by Jonathan A. Mitchell and C. Cormack Gates. 32 pp. (2002)
No. 39 Status of the Bull Trout (6DOYHOLQXVFRQÀXHQWXV) in Alberta, by John R. Post and Fiona D. Johnston. 40 pp. (2002)
No. 39 Update 2009. Status of the Bull Trout (6DOYHOLQXVFRQÀXHQWXV) in Alberta. Alberta Sustainable Resource Development and Alberta Conservation Association. 48 pp. (2009)
No. 40 Status of the Banff Springs Snail (Physella johnsoni) in Alberta, by Dwayne A.W. Lepitzki. 29 pp. (2002)
No. 41 Status of the Shortjaw Cisco (Coregonus zenithicus) in Alberta, by Mark Steinhilber. 23 pp. (2002)
No. 42 Status of the Prairie Falcon (Falco mexicanus) in Alberta, by Dale Paton. 28 pp. (2002)
No. 43 Status of the American Badger (Taxidea taxus) in Alberta, by Dave Scobie. 17 pp. (2002)
No. 44 Status of the Yucca Moth (Tegeticula yuccasella) in Alberta. Alberta Sustainable Resource Development. 21 pp. (2002)
No. 45 Status of the White-winged Scoter (Melanitta fusca deglandi) in Alberta. Alberta Sustainable Resource Development. 15 pp. (2002)
No. 46 Status of the Lake Sturgeon (Acipenser fulvescens) in Alberta. Alberta Sustainable Resource Development. 30 pp. (2002)
No. 47 Status of the Western Silvery Minnow (Hybognathus argyritis) in Alberta. Alberta Sustainable Resource Development. 24 pp. (2003)
1R 6WDWXVRIWKH6PDOOÀRZHUHG6DQG9HUEHQD Tripterocalyx micranthus) in Alberta. Alberta Sustainable Resource Development. 24 pp. (2003)
No. 49 Status of the Brown Creeper (Certhia americana) in Alberta. Alberta Sustainable Resource Development. 30 pp. (2003)
No. 50 Status of the Mountain Plover (Charadrius montanus) in Alberta. Alberta Sustainable Resource Development. 25 pp. (2003)
No. 51 Status of the St. Mary Shorthead Sculpin (provisionally Cottus bairdi punctulatus) in Alberta. Alberta Sustainable Resource Development. 24 pp. (2003)
No. 52 Status of the Stonecat (1RWXUXVÀDYXV) in Alberta. Alberta Sustainable Resource Development. 22 pp. (2003)
No. 53 Status of the Sage Thrasher (Oreoscoptes montanus) in Alberta. Alberta Sustainable Resource Development. 23 pp. (2004)
No. 54 Status of the Tiny Cryptanthe (Cryptantha minima) in Alberta. Alberta Sustainable Resource Development. 39 pp. (2004)
No. 55 Status of the Slender Mouse-ear-cress (Halimolobos virgata) in Alberta. Alberta Sustainable Resource Development. 27 pp. (2005)
No. 55 Update 2009. Status of the Slender Mouse-ear-cress (Halimolobos virgata or Transberingia bursifolia subsp. virgata) in Alberta. Alberta Sustainable Resource Development and Alberta Conservation Association. 28 pp. (2009) No. 56 Status of the Barred Owl (Strix varia) in Alberta. Alberta Sustainable Resource Development. 15 pp. (2005)
No. 57 Status of the Arctic Grayling (Thymallus arcticus) in Alberta. Alberta Sustainable Resource Development. 41 pp. (2005)
No. 58 Status of the Weidemeyer’s Admiral (Limenitis weidemeyerii) in Alberta. Alberta Sustainable Resource Development and Alberta Conservation Association. 13 pp. (2005)
No. 59 Status of the Porsild’s Bryum (Bryum porsildii) in Alberta. Alberta Sustainable Resource Development and Alberta Conservation Association. 30 pp. (2006)
No. 60 Status of the Western Grebe (Aechmophorus occidentalis) in Alberta. Alberta Sustainable Resource Development and Alberta Conservation Association. 29 pp. (2006)
No. 61 Status of the Westslope Cutthroat Trout (Oncorhynchus clarkii lewisii) in Alberta. Alberta Sustainable Resource Development and Alberta Conservation Association. 34 pp. (2006)
No. 62 Status of the Limber Pine (3LQXVÀH[LOLV) in Alberta. Alberta Sustainable Resource Development and Alberta Conservation Association. 17 pp. (2007)
No. 63 Status of the Whitebark Pine (Pinus albicaulis) in Alberta. Alberta Sustainable Resource Development and Alberta Conservation Association. 22 pp. (2007)
No. 64 Status of the Western Small-footed Bat (Myotis ciliolabrum) in Alberta. Alberta Sustainable Resource Development and Alberta Conservation Association. 24 pp. (2008)
1R 6WDWXVRIWKH9HUQD¶V)ORZHU0RWK Schinia verna) in Alberta. Alberta Sustainable Resource Development and Alberta Conservation Association. 17 pp. (2008)
No. 66 Status of the Athabasca Rainbow Trout (Oncorhynchus mykiss) in Alberta. Alberta Sustainable Resource Development and Alberta Conservation Association. 32 pp. (2009)