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2003

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Full-Text Articles in Ecology and Evolutionary Biology

The Dynastine Scarab Beetles Of Costa Rica And Panama (Coleoptera: Scarabaeidae: Dynastinae), Brett C. Ratcliffe Dec 2003

The Dynastine Scarab Beetles Of Costa Rica And Panama (Coleoptera: Scarabaeidae: Dynastinae), Brett C. Ratcliffe

Bulletin of the University of Nebraska State Museum

The 157 species of dynastine scarab beetles that occur in Costa Rica and Panama are comprehensively reviewed. Keys, descriptions, distributions, and notes on biology are provided for all species as well as illustrations and maps. The larvae of Enema endymion, Heterogomphus chevrolati, and Dynastes hercules are described for the first time. Also included are synopses of the higher-level taxa, a glossary, a gazetteer of place names, and a species checklist.

The following new species are described: Cyclocephala alazona, C. enigma, C. labidion, C. marylizae, C. mustacha, C. stockwelli, C. una mas (all Cyclocephalini); Irazua dilicra (Oryctini); Amblyoproctus centroamericanus, Hemiphileurus curoei, …


Body Mass Of Late Quaternary Mammals (Data Set), Felisa A. Smith, S. Kathleen Lyons, S.K. Morgan Ernest, Kate E. Jones, Kansas State University, Tamar Dayan, Pablo A. Marquet, James H. Brown, John P. Haskell Dec 2003

Body Mass Of Late Quaternary Mammals (Data Set), Felisa A. Smith, S. Kathleen Lyons, S.K. Morgan Ernest, Kate E. Jones, Kansas State University, Tamar Dayan, Pablo A. Marquet, James H. Brown, John P. Haskell

School of Biological Sciences: Faculty Publications

The purpose of this data set was to compile body mass information for all mammals on Earth so that we could investigate the patterns of body mass seen across geographic and taxonomic space and evolutionary time. We were interested in the heritability of body size across taxonomic groups (How conserved is body mass within a genus, family, and order?), in the overall pattern of body mass across continents (Do the moments and other descriptive statistics remain the same across geographic space?), and over evolutionary time (How quickly did body mass patterns iterate on the patterns seen today? Were the Pleistocene …


The Prairie Naturalist Volume 35, No.4 December 2003 Dec 2003

The Prairie Naturalist Volume 35, No.4 December 2003

The Prairie Naturalist

HOME RANGE AND MOVEMENTS OF EASTERN AND RIO GRANDE WILD TURKEY FEMALES IN NORTHEASTERN

SOUTH DAKOTA ▪ C. P. Lehman, L. D. Flake, and A. P. Leif

THE BAT FAUNA OF SOUTHEASTERN SOUTH DAKOTA . J. E. Lane, C. L. Buck, and R. M. Brigham

FIRST REPORT OF THE NORTH DAKOTA RARE BIRD COMMITTEE ▪ D. Svingen and R. E. Martin

BREEDING CHRONOLOGY OF DABBLING DUCKS IN MINNEDOSA, MANITOBA ▪ A. M. Wells and H. H. Prince

A LIVE COLLECTION OF A PISTOLGRIP FROM NEBRASKA ▪ S. C. Schainost

NEW NESTING DATES FOR SOME BREEDING BIRDS IN NORTH DAKOTA ▪ …


The Translocation Of Golden Perch, Murray Cod And Australian Bass, Into And Within Western Australia, For The Purposes Of Recreational Stocking, Domestic Stocking And Commercial And Non-Commercial Aquaculture. A Discussion Paper., Department Of Fisheries Dec 2003

The Translocation Of Golden Perch, Murray Cod And Australian Bass, Into And Within Western Australia, For The Purposes Of Recreational Stocking, Domestic Stocking And Commercial And Non-Commercial Aquaculture. A Discussion Paper., Department Of Fisheries

Fisheries management papers

This discussion paper has been prepared to provide information to assist in assessment of the possible impact of the translocation of golden perch (Macquaria ambigua), Murray cod (Maccullochella peelii peelii) and Australian bass (Macquaria novemaculeata) into and within Western Australia, for the purposes of recreational stocking, domestic stocking, commercial and non-commercial aquaculture. In assessing the translocation of any aquatic species, economic and social benefits must be balanced with biological and environmental risks.


Antipredator Behavior And Physiology Determine Lestes Species Turnover Along The Pond-Permanence Gradient, Robby Stoks, Mark A. Mcpeek Dec 2003

Antipredator Behavior And Physiology Determine Lestes Species Turnover Along The Pond-Permanence Gradient, Robby Stoks, Mark A. Mcpeek

Dartmouth Scholarship

Identifying key traits that shape trade-offs that restrict species to only a subset of environmental gradients is crucial to understanding and predicting species turnover. Previous field experiments have shown that larvae of Lestes damselfly species segregate along the entire gradient of pond permanence and predator presence and that differential predation risk and life history constraints together shape their distribution. Here, we report laboratory experiments that identify key differences in behavior and physiology among species that structure their distributions along this gradient. The absence of adaptive antipredator behavioral responses against large dragonfly larvae and fish of Lestes dryas, the only species …


Left-Sided Directional Bias Of Cloacal Contacts During House Sparrow Copulations, Karen B. Nyland, Michael P. Lombardo, Patrick A. Thorpe Dec 2003

Left-Sided Directional Bias Of Cloacal Contacts During House Sparrow Copulations, Karen B. Nyland, Michael P. Lombardo, Patrick A. Thorpe

Peer Reviewed Publications

Most female birds have only a left ovary and associated oviduct. The entry to the oviduct is on the left side of the urodeum of the cloaca. This arrangement may favor males that mount females from the left during copulation if it results in sperm being placed closer to the opening of the oviduct. Therefore, we predicted a left-sided directional bias of cloacal contacts during House Sparrow (Passer domesticus) copulations. Cloacal contacts from the left outnumbered those from the right 74 to 25 (3:1) during 25 bouts of copulation at 11 House Sparrow nests. While this pattern suggests …


Environmental Enrichment And Prior Experience Of Live Prey Improve Foraging Behaviour In Hatchery-Reared Atlantic Salmon, C. Brown, T. Davidson, K. Laland Dec 2003

Environmental Enrichment And Prior Experience Of Live Prey Improve Foraging Behaviour In Hatchery-Reared Atlantic Salmon, C. Brown, T. Davidson, K. Laland

Aquaculture Collection

Atlantic salmon salmo salar L. parr were reared for 3 months under standard hatchery conditions or in a structurally enriched tank (containing plants, rocks and novel objects). Half of each of these fish had prior exposure to live prey in the form of live bloodworm while the other half were fed hatchery-pellets. After 12 days all fish were tested on a novel live prey item (brine shrimp). A significant interaction between the two factors (prior exposure to live prey and rearing condition) revealed that foraging performance was only enhanced in fish that had been reared in a complex environment and …


Chemical And Toxicological Characterization Of The Lower Mobjack Bay, York River, Virginia Segment Of The Chesapeake Bay, Morris H. Roberts Jr., Mark A. Richards, Peter F. Delisle Dec 2003

Chemical And Toxicological Characterization Of The Lower Mobjack Bay, York River, Virginia Segment Of The Chesapeake Bay, Morris H. Roberts Jr., Mark A. Richards, Peter F. Delisle

Reports

The Chesapeake Bay segment called Lower Mobjack Bay Lower York River Virginia was found to have insufficient data to characterize in 1999. Therefore this area was selected for a chemical, toxicological, benthic community characterization study of the sediments in 2002. The segment was divided into 3 strata: the lower York River, the Poquoson River, and Back River, each with 4 randomly selected stations. Samples were collected in October 2002 for evaluation of conditions.

There were few significant chemical exceedances of the ER-L or ER-M in the three strata and no toxicologically effects from exposure to sediment samples from any stratum. …


A Case For Taxonomic Recognition Of The Taxon Enodia Anthedon Borealis A. H. Clark (Satyridae), Alex Grkovich, Harry Pavulaan Nov 2003

A Case For Taxonomic Recognition Of The Taxon Enodia Anthedon Borealis A. H. Clark (Satyridae), Alex Grkovich, Harry Pavulaan

The Taxonomic Report of the International Lepidoptera Survey

Clark (1936) described the taxa anthedon and borealis both as new subspecies of Enodia portlandia (Fabricius, 1781). Clark described borealis as the northernmost phenotypically different taxon in this group. Anthedon later became recognized as a distinct species with borealis as a subspecies of it. Masters (1971) characterized E. anthedon borealis as displaying several subtle phenotypic differences from nominotypical anthedon and also noted significant differences in behavior and habitat and reinforced the continued recognition of borealis as a valid subspecies. However, a number of publications after 1971 generally failed to recognize subspecific status for borealis, either ignoring borealis entirely …


A Taxonomic Review Of Chlosyne Ismeria With Description Of A New Subspecies From The Southern Appalachian Mountains, Ronald R. Gatrelle Nov 2003

A Taxonomic Review Of Chlosyne Ismeria With Description Of A New Subspecies From The Southern Appalachian Mountains, Ronald R. Gatrelle

The Taxonomic Report of the International Lepidoptera Survey

The taxon Boisduval and Le Conte described in 1833 as Melitaea ismeria is examined as a historical entity and confirmed as a sister subspecies of the taxon Chlosyne ismeria nycteis. The ismeria populations in the southern Appalachian mountains (United States) are described as a new subspecies: Chlosyne ismeria obsoleta. In facies, this new subspecies is most similar to the western subspecies Chlosyne ismeria drusius in that it is dark and contrasting in its dorsal markings. It is known to range from the mountain region of extreme northern Georgia north in the Appalachians to near southwestern Virginia, United States. …


Subadult Experience Influences Adult Mate Choice In An Arthropod: Exposed Female Wolf Spiders Prefer Males Of A Familiar Phenotype, Eileen Hebets Nov 2003

Subadult Experience Influences Adult Mate Choice In An Arthropod: Exposed Female Wolf Spiders Prefer Males Of A Familiar Phenotype, Eileen Hebets

Eileen Hebets Publications

Current sexual selection theory proposes several potential mechanisms driving the evolution of female mating preferences, few of which involve social interactions. Although vertebrate examples of socially influenced mating preferences do exist, the invertebrate examples are virtually nonexistent. Here I demonstrate that the mating preferences of female wolf spiders can be acquired through exposure as subadults to unrelated, sexually active adult males. I first conducted exposure trials during which subadult females of the wolf spider Schizocosa uetzi were allowed to interact with mature males of an experimentally manipulated phenotype (either black or brown forelegs). After maturation, these previously exposed females were …


Genetic Relationships Among Leptographium Terebrantis And The Mycangial Fungi Of Three Western Dendroctonus Bark Beetles, Diana Six, Thomas C. Harrington, Joseph Steimel, Douglas Mcnew, T. D. Paine Nov 2003

Genetic Relationships Among Leptographium Terebrantis And The Mycangial Fungi Of Three Western Dendroctonus Bark Beetles, Diana Six, Thomas C. Harrington, Joseph Steimel, Douglas Mcnew, T. D. Paine

Ecosystem and Conservation Sciences Faculty Publications

Morphology, mitochondrial DNA (mtDNA) restriction fragment polymorphisms (RFLPs) and nuclear DNA (nDNA) fingerprinting were used to clarify relationships among the morphologically similar Ophiostoma and Leptographium species associated with mycangia of three Dendroctonus bark beetles (Ophiostoma clavigerum associated with both D. ponderosae and D. jeffreyi, and L. pyrinum associated with D. adjunctus), as well as a closely related nonmycangial bark beetle associate (L. terebrantis). Most isolates of O. clavigerum form long (40-70 μm), septate conidia, while all isolates of L. terebrantis and L. pyrinum form conidia less than 17.0 μm in length. The conidia of L. pyrinum are pyriform, with truncate …


Habitat Use Of Sympatrically Nesting Fish Crows And American Crows, Brook Lauro, John Tanacredi Ph.D. Nov 2003

Habitat Use Of Sympatrically Nesting Fish Crows And American Crows, Brook Lauro, John Tanacredi Ph.D.

Faculty Works: CERCOM

We examined habitat use of sympatric Fish Crows (Corvus ossifragus) and American Crows (C. brachyrhynchos) nesting in the vicinity of waterbird breeding locations at the Rockaway Peninsula, New York City. Fish Crows nested significantly more often at natural habitats, including coastal dunes and salt marsh islands; American Crows nested significantly more often at residential and recreational areas. In regard to potential foraging areas, Fish Crows nested closer to waterbird colonies and to the water's edge while American Crows nested closer to a garbage source and to lawns. Fish Crows nested significantly more often in deciduous trees …


University Of Nebraska-Lincoln School Of Natural Resources Review: Final Report, December 2003, Michael O'Neill, Phaedra Budy, Stephen Degloria, Ed Kanemasu, Jamie Robertson, Derrel Martin, Anne K. Vidaver, Tylr Naprstek, Donna Woudenberg Nov 2003

University Of Nebraska-Lincoln School Of Natural Resources Review: Final Report, December 2003, Michael O'Neill, Phaedra Budy, Stephen Degloria, Ed Kanemasu, Jamie Robertson, Derrel Martin, Anne K. Vidaver, Tylr Naprstek, Donna Woudenberg

School of Natural Resources: Documents and Reviews

In July 2003, the School of Natural Resource Sciences was merged with the Conservation and Survey Division and the Water Center Nebraska State Survey. This merger produced the School of Natural Resources (hereafter referred to as the "School") in its current form. The University of Nebraska-Lincoln requested a ten-year review of the School's programs and activities. The review was administered by the Cooperative State Research, Education and Extension Service (CSREES) in cooperation with the University of Nebraska-Lincoln's Institute of Agriculture and Natural Resources, the College of Agriculture, and the School.

The review document is divided into nine sections. The first …


Convergent Habitat Segregation Of Aedes Aegypti And Aedes Albopictus (Diptera : Culicidae) In Southeastern Brazil And Florida, Marieta A H Braks, Ricardo Lourenco-De-Oliveira, Steven A. Juliano, Nildimar A. Honorio, L Philip Lounibos Nov 2003

Convergent Habitat Segregation Of Aedes Aegypti And Aedes Albopictus (Diptera : Culicidae) In Southeastern Brazil And Florida, Marieta A H Braks, Ricardo Lourenco-De-Oliveira, Steven A. Juliano, Nildimar A. Honorio, L Philip Lounibos

Faculty Publications – Biological Sciences

During the rainy season of 2001, the incidence of the dengue vectors Aedes aegypti and Ae. albopictus was examined in different habitats of two cities (Rio de Janeiro and Nova Iguacu) in Rio de Janeiro State, Brazil, and in two cities (Palm Beach and Boca Raton) in Florida. Oviposition trap collections were performed in urban, suburban, and rural habitats in both areas. Our hypothesis that the abundances and frequencies of occurrence of Ae. aegypti and Ae albopictus are affected in opposite ways by increasing urbanization was only partially supported. City, habitat, and their interaction significantly affected the abundance of both …


Inventory Of The Land Conservation Values Of The Houtman Abrolhos Islands., Department Of Fisheries. Western Australia Oct 2003

Inventory Of The Land Conservation Values Of The Houtman Abrolhos Islands., Department Of Fisheries. Western Australia

Fisheries management papers

There is growing pressure for increased development on the Houtman Abrolhos Islands (Abrolhos Islands). Much work on the natural, historical and cultural values of the islands has been undertaken. This document is a review of this work, which provides an overview of the conservation values of the islands, and should prove useful in considering the selection, design and evaluation of proposed developments at the Abrolhos Islands. Based on existing information, the purpose of the Review of the Land Conservation Values of the Houtman Abrolhos Islands is to: • identify and map areas of conservation value (natural, historical and cultural); and …


The Evolution Of Warning Signals As Reliable Indicators Of Prey Defense, Thomas N. Sherratt, Christopher D. Beatty Oct 2003

The Evolution Of Warning Signals As Reliable Indicators Of Prey Defense, Thomas N. Sherratt, Christopher D. Beatty

Biology

It is widely argued that defended prey have tended to evolve conspicuous traits because predators more readily learn to avoid defended prey when they are conspicuous. However, a rival theory proposes that defended prey have evolved such characters because it allows them to be distinguished from undefended prey. Here we investigated how the attributes of defended (unprofitable) and undefended (profitable) computer-generated prey species tended to evolve when they were subject to selection by foraging humans. When cryptic forms of defended and undefended species were similar in appearance but their conspicuous forms were not, defended prey became conspicuous while undefended prey …


Integrated Weed Management Plan For The Lower Las Vegas Wash, Elizabeth Bickmore Sep 2003

Integrated Weed Management Plan For The Lower Las Vegas Wash, Elizabeth Bickmore

Publications (WR)

The Las Vegas Wash (Wash) is the primary drainage for the metropolitan Las Vegas Valley, eventually finding its way into the Colorado River watershed system. Pursuant to the recommendations of the Water Quality Citizens Advisory Committee, the Las Vegas Wash Coordination Committee (LVWCC) was formed in 1998 to develop a comprehensive plan for the long-term stabilization and management of the Wash. Consisting of representatives from 28 government agencies, businesses, environmental groups and citizens, the LVWCC formulated the Las Vegas Wash Comprehensive Adaptive Management Plan (CAMP) and designated the Southern Nevada Water Authority (SNWA) as the lead agency for the implementation …


Effects Of Management Practices On Grassland Birds: Greater Prairie-Chicken, W. D. Svedarsky, J. E. Toepfer, R. L. Westemeier, R. J. Robel Sep 2003

Effects Of Management Practices On Grassland Birds: Greater Prairie-Chicken, W. D. Svedarsky, J. E. Toepfer, R. L. Westemeier, R. J. Robel

Effects of Management Practices on Grassland Birds

Information on the habitat requirements and effects of habitat management on grassland birds were summarized from information in more than 5,500 published and unpublished papers. A range map is provided to indicate the breeding distribution of Greater Prairie-Chicken in the United States and southern Canada. Although birds frequently are observed outside the breeding range indicated, the maps are intended to show areas where managers might concentrate their attention. It may be ineffectual to manage habitat at a site for a species that rarely occurs in an area. The species account begins with a brief capsule statement, which provides the fundamental …


Csrees School Of Natural Resources Comprehensive Five-Year Review Sep 2003

Csrees School Of Natural Resources Comprehensive Five-Year Review

School of Natural Resources: Documents and Reviews

No abstract provided.


The Prairie Naturalist Volume 35, No.3 September 2003 Sep 2003

The Prairie Naturalist Volume 35, No.3 September 2003

The Prairie Naturalist

BROWN-HEADED COWBIRDS IN GRASSLANDS: THEIR HABITATS, HOSTS, AND RESPONSE TO MANAGEMENT ▪ J. A. Shaffer, C. M. Goldade, M. F. Dinkins, D. H. Johnson, L. D. Igl, and B. R. Euliss

LlGUMIA SUBROSTRATA (BIVALVIA: UNIONIDAE) IN MINNESOTA AND ITS STATUS IN THE UPPER MIDWEST ▪ B. E. Sietman, D. E. Kelner, R. A. Hart, and M. Davis

GUIDELINES FOR FINDING NESTS OF PASSERINE BIRDS IN TALLGRASS PRAIRIE ▪ M. Winter, S. E. Hawks, J. A. Shaffer, and D. H. Johnson

RESPONSE OF THE LEAST SHREW TO PREY OLFACTORY CUES ▪ F. Punzo and C. Gonzalez

Book Reviews

North Dakota's Butterflies …


Abundance And Distribution Of Planktonic Archaea And Bacteria In The Waters West Of The Antarctic Peninsula, Matthew Church, Edward F. Delong, Hugh Ducklow, Markus Karner, Christian Preston, David M. Karl Sep 2003

Abundance And Distribution Of Planktonic Archaea And Bacteria In The Waters West Of The Antarctic Peninsula, Matthew Church, Edward F. Delong, Hugh Ducklow, Markus Karner, Christian Preston, David M. Karl

VIMS Articles

Polyribonucleotide probes targeting planktonic archaeal (Group I and II) and bacterial rRNA revealed that Archaea comprised a significant fraction of total prokaryote cell abundance in the marine waters west of the Antarctic Peninsula. Determinations of Archaea and Bacteria cell abundances were made during two research cruises to the Palmer Long‐Term Ecological Research region during the austral winter and summer of 1999. During the austral summer, surface water abundances of Group I (GI) Archaea were generally low, averaging 4.7 x 103 cells ml−1 and accounting for 1% of the total picoplankton assemblage. The abundance of GI Archaea increased significantly with depth, …


Park's Tribolium Competition Experiments: A Non-Equilibrium Species Coexistence Hypothesis, Jeffrey Edmunds, J. M. Cushing, R. F. Costantino, Shandelle M. Henson, Brian Dennis, R. A. Desharnais Sep 2003

Park's Tribolium Competition Experiments: A Non-Equilibrium Species Coexistence Hypothesis, Jeffrey Edmunds, J. M. Cushing, R. F. Costantino, Shandelle M. Henson, Brian Dennis, R. A. Desharnais

Faculty Publications

1. In this journal 35 years ago, P. H. Leslie, T. Park and D. B. Mertz reported competitive exclusion data for two Tribolium species. It is less well-known that they also reported 'difficult to interpret' coexistence data. We suggest that the species exclusion and the species coexistence are consequences of a stable coexistence two-cycle in the presence of two stable competitive exclusion equilibria. 2. A stage-structured insect population model for two interacting species forecasts that as interspecific interaction is increased there occurs a sequence of dynamic changes (bifurcations) in which the classic Lotka-Volterra-type scenario with two stable competitive exclusion equilibria …


Draft Plan Of Management For The Proposed Point Quobba Fish Habitat Protection Area., Department Of Fisheries Aug 2003

Draft Plan Of Management For The Proposed Point Quobba Fish Habitat Protection Area., Department Of Fisheries

Fisheries management papers

Point Quobba is a popular site for locals and tourists for beach activities, fishing and snorkelling, and as a place for children to learn to swim and gain an awareness of the marine environment. The marine life and habitats of the area are of considerable scientific and recreational interest and are highly valued in the local community. However, they are at risk from their high level of use and from conflict between users due to their proximity to popular tourism, boat ramp, camping and settlement areas on-shore.


A Subspecific Assessment Of The Genus Hesperia (Hesperiinae) In Eastern North America (Part I: The South): New Subspecies Of Hesperia Metea, Hesperia Sassacus And Hesperia Meskei, Ronald R. Gatrelle, Marc C. Minno, Alex Grkovish Jul 2003

A Subspecific Assessment Of The Genus Hesperia (Hesperiinae) In Eastern North America (Part I: The South): New Subspecies Of Hesperia Metea, Hesperia Sassacus And Hesperia Meskei, Ronald R. Gatrelle, Marc C. Minno, Alex Grkovish

The Taxonomic Report of the International Lepidoptera Survey

Hesperia meskei pinocayo Gatrelle and Minno is described from Big Pine Key, Monroe County, Florida, United States. This subspecies is thought to be nearly extinct. Its mainland status is uncertain. It is characterized by bi-colored ventral hindwings with more prominent ventral hindwing spots. Hesperia metea intermedia Gatrelle is described from Pickens County, South Carolina, United States. Its range is from northwestern South Carolina, United States west through Mississippi, United States and probably into Missouri, United States. Males have the least dorsal fulvous of the metea subspecies; ventrally they are well marked. Females are similar to subspecies licinus. Hesperia sassacus …


The Role Of Indigenous Parataxonomists In Botanical Inventory: From Herbarium Amboinense To Herbarium Floresense, Jeanine Pfeiffer, Yeremias Uril Jul 2003

The Role Of Indigenous Parataxonomists In Botanical Inventory: From Herbarium Amboinense To Herbarium Floresense, Jeanine Pfeiffer, Yeremias Uril

Faculty Publications, Environmental Studies

The enormous taxonomic scope of the Flora Malesiana Project is exacerbated by the extremely short supply of trained researchers and taxonomic experts available to undertake this task. The vast number of indigenous botanical experts resident in Malesia represents a potentially valuable, yet largely unrecognised and untapped, resource. By engaging in collaborative research with indigenous parataxonomists, Flora Malesiana researchers can develop field methodologies that enable a more comprehensive and accurate assessment of the botanical resources of the region while simultaneously enrolling local communities in the sustainable, long-term conservation of native biocultural diversity. This paper outlines a number of projects involving indigenous …


Trying To Fix The Development In Evolutionary Developmental Psychology, David S. Moore Jul 2003

Trying To Fix The Development In Evolutionary Developmental Psychology, David S. Moore

Pitzer Faculty Publications and Research

If we agree for a moment that there is such a thing as human nature, we immediately encounter an extraordinarily thorny question: Where does our nature come from? This question drives David Bjorklund and Anthony Pellegrini’s new book The Origins of Human Nature: Evolutionary Developmental Psychology. The question is so challenging, in part, because human nature reflects at least two conceptually distinct processes: evolution and development. The former, which operates across generations, allows the continued existence of characteristics that permitted survival and reproduction in our ancestors; the latter, which operates during a person’s lifetime, contributes to the appearance of …


Effect Of Food Availability On Reproduction And Brood Size In A Freshwater Brooding Bivalve, Mark Beekey, Ronald H. Karlson Jul 2003

Effect Of Food Availability On Reproduction And Brood Size In A Freshwater Brooding Bivalve, Mark Beekey, Ronald H. Karlson

Biology Faculty Publications

Brood size is often constrained by the amount of energy available to produce offspring. Yet, energetic constraints may not be as important if the physical capacity to brood offspring is limited. Investigating the relative importance of energetic and physical constraints on brood size is necessary to understand how reproductive strategies are molded by natural selection. We investigated how food availability affects brood size in Sphaerium striatinum, a freshwater bivalve. We reared juveniles to adulthood under three food levels in a common garden experiment. The number of reproductive attempts, brood size, and stage of offspring development were measured. Clams reared …


Preliminary Report On The Osteology And Relationships Of A New Aberrant Cryptocleidoid Plesiosaur From The Sundance Formation, Wyoming, F. Robin O’Keefe, William Wahl Jr. Jul 2003

Preliminary Report On The Osteology And Relationships Of A New Aberrant Cryptocleidoid Plesiosaur From The Sundance Formation, Wyoming, F. Robin O’Keefe, William Wahl Jr.

Biological Sciences Faculty Research

The cryptocleidoid plesiosaur Tatenectes laramiensis, new genus, is described from the Redwater Shale Member of the Sundance Formation, Narrona County, Wyoming. The holotype of this species was a partial skeleton that has since been lost. A neotype is designated that preserves the same elements present in the holotype. A second specimen is referred to the taxon, and this specimen includes cranial material. The preserved cranial elements are the left squamosal, a partial right frontal, several isolated teeth, the parasphenoid, and large portions of the left and right pterygoids. The skull shares many traits with that of Kimmerosaurus, a cryptocleidoid plesiosaur …


Some Environmental Relationships Of Undergrowth Species In Aspen Communities Of The Intermountain West, W F. Mueggler Jun 2003

Some Environmental Relationships Of Undergrowth Species In Aspen Communities Of The Intermountain West, W F. Mueggler

Aspen Bibliography

This analysis results from an opportunity to explore plant-environmental relationships from data collected for a different purpose. Origin of the data is a study designed to develop an aspen community-type classification for southern Idaho, western Wyoming, Utah, and Nevada which resulted in the publication "Aspen Community Types of the Intermountain Region" GTR INT-250 by W.F. Mueggler (1988).