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Articles 871 - 900 of 956
Full-Text Articles in Entire DC Network
Residual Pesticides In Fishes From Lake Chicot, Arkansas, C. M. Cooper, S. S. Knight
Residual Pesticides In Fishes From Lake Chicot, Arkansas, C. M. Cooper, S. S. Knight
Journal of the Arkansas Academy of Science
Samples of fish from isolated and flow-through portions of Lake Chicot, Arkansas, were analyzed for residual pesticide concentrations from 1978 and 1981. Where appropriate ecologically, fish flesh, viscera and whole fish, were analyzed for the common organochlorine insecticides DDT [1,1 ,1-trichloro -2,2bis(p-chlorophenyl)-ethane], DDE [1,1-dichloro-2,2-bis(p-chlorophenyl)-ethyene], DDD [1,1-dichloro -2,2-bis(p-chlorophenyl)-ethane], toxaphene (chlorinated camphene), chlordane, heptachlor, heptachlor epoxide, dieldrin, and endrin. DDT, DDT metabolites, and heptachlor were significantly (a = 0.05) higher in spotted gar (Lepisosteus oculatus) and yellow bullhead catfish (Ictalurus natalis) than in other species examined. Pesticide concentrations did not exceed the acceptable levels established by the U.S. Environmental Protection Agency although …
The Prairie Naturalist Volume 18, No. 3 September 1986
The Prairie Naturalist Volume 18, No. 3 September 1986
The Prairie Naturalist
Paul B. Kannowski, Editor
Nikki R. Seabloom, Assistant Editor
Douglas H. Johnson, Book Review Editor
TABLE OF CONTENTS
HABITAT SELECTION AND MOVEMENT PATTERNS IN SANDHILLS RODENTS ▪ C. A. Lemen and P. W. Freeman
THE HERPETOFAUNA OF THE WEAVER DUNES, WABASHA COUNTY, MINNESOTA ▪ P. A. Cochran
MULTIPLE EGG CLUTCH PRODUCTION IN THE GREAT PLAINS TOAD ▪ J. J. Krupa
MAMMALS OF THE KONZA PRAIRIE RESEARCH NATURAL AREA, KANSAS ▪ E. J. Finck, D. W. Kaufman, G. A. Kaufman, S. K. Gurtz, B. K. Clark, L. J. McLellan, and B. S. Clark
AQUATIC INVERTEBRATES IN LEVEL DITCHES AND ADJACENT EMERGENT …
Assault On Eden: Destruction Of Latin America's Rain Forests, Douglas R. Shane
Assault On Eden: Destruction Of Latin America's Rain Forests, Douglas R. Shane
Ecology Collection
In the seemingly distant world of Latin America's rain forests, man's greed and desperation have resulted in a fire which threatens to obscure our ability to observe life's poetry: The continuing destruction of the earth's tropical rain forests is one of the most serious environmental problems confronting humanity today: Intact, these vital organisms offer an understanding of the planet's past and a key to our future; destroyed, they threaten catastrophe of global consequence.
Multiple Trophic Levels In Soft-Bottom Communities, John A. Commito, William G. Ambrose Jr.
Multiple Trophic Levels In Soft-Bottom Communities, John A. Commito, William G. Ambrose Jr.
Environmental Studies Faculty Publications
In order to assess the general applicability of recent field experiments with predatory infauna, we searched the literature and found 48 well-documented cases of infaunal consumption by such predators. In 63 % of the cases detailed enough to make a determination, the predators ate other predators. Multiple trophic levels within the infauna are probably a common feature of many soft-bottom communities.
Two Modal Action Patterns With A Continuous Temporal Distribution, Alan B. Bond, George W. Barlow, William Rogers
Two Modal Action Patterns With A Continuous Temporal Distribution, Alan B. Bond, George W. Barlow, William Rogers
Papers in Behavior in Biological Sciences
Most methods of quantitative analysis of animal behavior assume that action patterns can be unambiguously classified into discrete, exclusive categories. This is not invariably the case. The digging behavior of the Midas cichlid (Cichlasoma citrinellum), for example, exhibits two functionally distinct modalities, scoop and pi&, that intergrade continuously in form but are separable probabilistically. We present a technique for analyzing such behaviors that provides a reliable basis for formulating and verifying categories and allows a quantitative assessment of functional dissimilarity.
Die meisten Methoden quantitativer Verhaltensanalysen setzen eindeutige Klassifizierung der Verhaltensweisen in sich wechselseitig ausschlieißende Kategorien voraus. Die sind …
Dummy-Elicited Aggressive Behavior In The Polychromatic Midas Cichlid, George W. Barlow, William Rogers, Alan B. Bond
Dummy-Elicited Aggressive Behavior In The Polychromatic Midas Cichlid, George W. Barlow, William Rogers, Alan B. Bond
Alan Bond Publications
Aggressive responses of 12 individuals of the polychromatic Midas cichlid Cichlasoma citrinellum were tested with five different sizes of neutrally colored (spot pattern) life-like dummies. The dummies were presented daily over six days, for one minute apiece, in a balanced design. Color (gold or normal morph) and sex of the subjects were varied independently. The attacks and threats at the dummies were positively correlated in their occurrence so they were combined to yield an aggregate measure of aggression. Attacks on blinded juveniles, five minutes before and five minutes after viewing a dummy, were analyzed to test for the occurrence of …
The Effects Of Dredged Materials On The Copeod, Acartia Tonsa, Renee Suzanne Crouch
The Effects Of Dredged Materials On The Copeod, Acartia Tonsa, Renee Suzanne Crouch
Biological Sciences Theses & Dissertations
A study was conducted to determine the potential impact of open ocean disposal of sediments dredged from a highly industrialized seaport. Sediments from three potential dredge sites along the Southern Branch of the Elizabeth River, Hampton Roads, Virginia were evaluated for acute toxicity. The suspended particulate fractions of dredged materials were tested in a series of 96-hour, static bioassays using the calanoid copepod, Acartia tonsa Dana. Significant mortalities were observed for all three sites with the sediments from the most heavily industrialized site producing immediate and severe mortality. Analysis of results indicates that mortality was highly related to the volatile …
Foraging Ecology Of Temperate-Zone And Tropical Woodpeckers, Robert A. Askins
Foraging Ecology Of Temperate-Zone And Tropical Woodpeckers, Robert A. Askins
Biology Faculty Publications
The foraging behavior of 11 species of woodpeckers in Guatemala, Maryland, and Minnesota was studied in order to test the seasonal stability hypothesis. This hypothesis predicts that specialization and species richness should be no greater for tropical wood-excavators than for those in the temperate zone because wood-excavators in both regions are buffered against seasonal change. Niche breadth values for six variables that describe foraging methods and perches were calculated by two methods. Unweighted niche breadth values were similar for tropical and temperate woodpeckers for all variables except foraging techniques; in this case the temperate species are more specialized. With weighted …
The Transmission Of Learned Behavior: An Observational Study Of Father-Child Interactions During Fishing, Judy Diamond, Alan B. Bond
The Transmission Of Learned Behavior: An Observational Study Of Father-Child Interactions During Fishing, Judy Diamond, Alan B. Bond
Papers in Behavior in Biological Sciences
Mechanisms of transmission of learned behavior were described in terms of the behavioral interactions between fathers and their children as they fished from a pier on Maryland’s Eastern Shore. Verbal and nonverbal behaviors were analyzed using hierarchical cluster analysis and the patterns of association in the behavioral repertoire were described in detail. Groupings of associated behaviors ranged from clusters suggestive of modeling or simple showing to complex combinations of behaviors involved in teaching. There were indications that the transmission behaviors varied with the content of the transmitted information and the role of the performer. Role differentiation in the transmission behaviors …
The North American Black Duck (Anas Rubripes): A Case Study Of 28 Years Of Failure In American Wildlife Management, John W. Grandy
The North American Black Duck (Anas Rubripes): A Case Study Of 28 Years Of Failure In American Wildlife Management, John W. Grandy
Conservation Collection
A scientific and technical analysis is presented of the factors which may have been primarily responsible for an estimated 60% decline in the black duck (Anas rubripes) population since 1955. The analyses presented show that the U.S. Fish and Wildlife Service (FWS), the management agency responsible for waterfowl management in the United States, has recognized the population decline, that the FWS's own experts have consistently recognized that hunting is the most likely cause of the population decline, and that hunting is the only mortality factor which wildlife managers can control in the practical sense. Using FWS information, the author shows, …
The Prairie Naturalist Volume 14, No. 3. September 1982
The Prairie Naturalist Volume 14, No. 3. September 1982
The Prairie Naturalist
FECAL pH OF DESERT AND EASTERN COTTONTAIL RABBITS IN TEXAS ▪ R. J. Warren and K. T. Scribner
NESTING OF THE AMERICAN AVOCET IN NORTH DAKOTA ▪ J. G. Sidle and P. M. Arnold
REVISED CHECKLIST OF NORTH DAKOTA BIRDS ▪ C. A. Fannes and R. E. Stewart
THE EFFECT OF WEATHER FACTORS ON AUDUBON CHRISTMAS BIRD COUNTS L. L. Falk
NOTES:
Additional Nest Record for Red-breasted Nuthatch in North Dakota ▪ R. Hopkins
A Henslow's Sparrow in North Dakota ▪ R. B. Renken and J. J. Dinsmore
First Documented Record of the Moose in South Dakota ▪ D. A. …
Aquatic Macroinvertebrates Of Three Acid Bogs On Crowley's Ridge In Northeast Arkansas, Jerry L. Farris, George L. Harp
Aquatic Macroinvertebrates Of Three Acid Bogs On Crowley's Ridge In Northeast Arkansas, Jerry L. Farris, George L. Harp
Journal of the Arkansas Academy of Science
Qualities and quantities of parameters composing the bog systems in Northeast Arkansas are not entirely reflective of those defining bogs of the northern United States. While pH is restricting to the organisms of each bog studied (4.8-6.9), the major limiting factor is the amount of available water. Three acidophilic bogs with shallow water depths (2-30 cm) yielded a total of 75 aquatic macroinvertebrate taxa. The bog with greatest surface area supported 67 taxa and a mean numerical standing crop of 14 organisms/2 hr sampling period. The bog with the smallest surface area had 13 taxa and a mean standing crop …
Striving For Common Ground: Humane And Scientific Considerations In Contemporary Wildlife Management, Stephen R. Kellert
Striving For Common Ground: Humane And Scientific Considerations In Contemporary Wildlife Management, Stephen R. Kellert
Nature Collection
Although there is a diversity of opinion about how to view the relationship between humans and wildlife, recent political pressures from the current administration make it mandatory that these diverse groups coalesce to use their combined leverage to halt the planned incursions into the remaining habitats of wildlife. It is also important to begin to see nature as a complex and interrelated whole, and to respect the integrity of that whole, rather than simply select individual species for affection and protection.
The Effects Of Copper On Skeletonema Costatum (Greville) Cleve, Susanne Sybille Jackman
The Effects Of Copper On Skeletonema Costatum (Greville) Cleve, Susanne Sybille Jackman
Biological Sciences Theses & Dissertations
Copper levels and dominant phytoplankton species composition were examined from six sites in Kings Creek on Virginia's Eastern Shore from March to August 1980. Creek copper levels were determined by an APDCMIBK extraction procedure and ranged from 0.003 to 0.020 mg/1. Diatoms were the dominant phytoplankters with Skeletonema costatum (Greville) Cleve emerging as a major late summer species.
Subsequent laboratory studies involved 96-hour experiments using Skeletonema costatum (clone Skel) grown in enriched natural seawater. The water was collected from Kings Creek and enriched to Guillard and Ryther's (1962) f/2 media levels. Cupric sulfate was added to the experimental culture media …
The Buller-Steer Syndrome, Richard Ulbrich
The Buller-Steer Syndrome, Richard Ulbrich
Ethology Collection
Bulling among steers is an abnormal behavioral trait and is a common health and economic problem in feedlot operations. Factors associated with the buller-steer syndrome are hormonal implantation, seasonality and environmental conditions, stress, overcrowding, and social interaction between individuals. Research has examined relationships between these and other factors and buller occurrence. Boredom of feedlot cattle may contribute to buller occurrence and other undesirable behavior more than we might suspect. Research is needed to determine the feasibility of enriching the environment of penned livestock in general, the goal of which would be, in theory, the elimination of undesirable behavior as well …
The Prairie Naturalist Volume 12, Numbers 3 And 4. September–December 1980
The Prairie Naturalist Volume 12, Numbers 3 And 4. September–December 1980
The Prairie Naturalist
THE FLORA AND SANDHILLS PRAIRIE COMMUNITIES OF ARAPAHO PRAIRIE, ARTHUR COUNTY, NEBRASKA ▪ K. H. Keeler, A. T. Harrison and L. S. Vescio
USE OF ULTRASONIC SOUND TO ESTIMATE BODY FAT DEPOTS IN THE MALLARD ▪ G. A. Baldassarre, R. J. Whyte and E. G. Bolen
NORTHERN MOCKINGBIRD BREEDING IN NORTH DAKOTA ▪ D. Child, J. Fontaine, T. Gatz, M. Johnson and J. Oswald
SPRING ARRIVAL OF BIRDS AT WOODWORTH, NORTH DAKOTA ▪ K. F. Higgins, L. M. Kirsch, and J. M. Callow
HYBRIDIZATION AND TAXONOMIC STATUS OF GREATER PRAIRIE CHICKENS AND SHARP-TAILED GROUSE (HYBRIDIZATION IN GROUSE) ▪ D. W. …
Sampling Problems And Interpretation Of Chemical Analysis Of Mineral Springs Used By Wildlife, D. Fraser, E. Reardon, F. Dieken, B. Loescher
Sampling Problems And Interpretation Of Chemical Analysis Of Mineral Springs Used By Wildlife, D. Fraser, E. Reardon, F. Dieken, B. Loescher
Habitat Assessment and Management Collection
Mineral-rich springs used by wildlife were studied in order to develop an appropriate sampling technique. The mineral content of the water varied spatially within a lick, apparently because of contamination by nonlick water and animal urine. The spring source usually could be located with a conductivity meter. Samples contaminated by animal urine could be recognized by their high N content and usually by their color. The distinctive chemical composition of licks is best appreciated by comparing filtered samples of lick water with nonlick water collected nearby. Field filtration was necessary when samples were preserved with acid for trace-metal analysis. Soil …
The Prairie Naturalist Volume 12, Number 1. March, 1980
The Prairie Naturalist Volume 12, Number 1. March, 1980
The Prairie Naturalist
RESIDUAL SEEDS AS POTENTIAL SPRING WATERFOWL FOODS IN SMALL, MAN-MADE IMPOUNDMENTS ▪ G. A. Baldassarre
NOTES ON THE NATURAL HISTORY OF BATS FROM BADLANDS NATIONAL MONUMENT, SOUTH DAKOTA ▪ J. P. Farney and J. K. Jones, Jr.
PRAIRIE CHICKEN DOMINATED SHARP-TAILED GROUSE INTERACTION ▪ R. A. Schmidt
CHRISTMAS BIRD COUNTS FOR NORTH DAKOTA— 1979 ▪ R. N. Randall
THIRD NESTING OF CATTLE EGRET IN NORTH DAKOTA ▪ R. A. Schmidt
FIRST BREEDING RECORDS OF THE WHITE-FACED IBIS IN NORTH DAKOTA ▪ R. A. Schmidt
NOTES
Pinon Jay in North Dakota ▪ R. N Randall, J. Swanick and O. Swanick
Gray-crowned …
The Prairie Naturalist Volume 11, Number 4. December 1979
The Prairie Naturalist Volume 11, Number 4. December 1979
The Prairie Naturalist
THE STATUS OF HERONS, EGRETS AND IBISES IN NORTH DAKOTA ▪ J. T. Lokomoen
RANGE EXPANSION OF BAIRD'S SPARROW IN SOUTH DAKOTA ▪ H. A. Kantrud and C. A. Faanes
NESTING RECORDS OF THE WOOD THRUSH IN NORTH DAKOTA ▪ S. O. Lambeth and D. O. Lambeth
SOME ECOLOGICAL ASPECTS OF MARBLED GODWITS AND WILLETS IN NORTH DAKOTA ▪ K. F. Higgins, L. M. Kirsch, M. R. Ryan and R. B. Renken
NOTES ON THE INCUBATION BEHAVIOR OF BLACK-BELLIED WHISTLING DUCKS ▪ E G. Bolen and E. N. Smith
NOTES
Red Fox Captures Sharp-tailed Grouse at the Lek ▪ S. …
The Prairie Naturalist Volume 11, Number 3. September 1979
The Prairie Naturalist Volume 11, Number 3. September 1979
The Prairie Naturalist
DISTRIBUTION AND NATURAL HISTORY OF AMPHIBIANS AND REPTILES IN WESTERN NEBRASKA WITH ECOLOGICAL NOTES ON THE HERPETILES OF ARAPAHO PRAIRIE ▪ R. E. Ballinger, J. D. Lynch and P. H. Cole
AVIAN MORTALITY FROM A SEVERE HAIL STORM ▪ J. L. Piehl
EFFECTS OF A SUMMER STORM ON BIRD POPULATIONS ▪ D. H. Johnson
SEXING AND AGING CRITERIA FOR THE WHITE PELICAN ▪ G. R. Lingle and N. F. Sloan
CANVASBACK DUCK RECOVERS FROM COMPOUND LUXATION TO WING ▪ H. A. Doty
SECOND NORTH DAKOTA RECORD OF LOUISIANA WATERTHRUSH ▪ C. A. Faanes
FIRST NESTING RECORD OF A LOUISIANA HERON …
Front Matter, Elephant Editors
Observations In Tsavo National Park, Kenya, Evans E. Mgaah
Observations In Tsavo National Park, Kenya, Evans E. Mgaah
Elephant
Personal observations from four years as a game ranger in Tsavo National Park, Kenya.
Captive Elephant Population Of North America: 1979 Update, Elephant Editors
Captive Elephant Population Of North America: 1979 Update, Elephant Editors
Elephant
Survey of elephants in captivity, 1979.
Observations Of Elephants In East And Southern Africa, Jeheskel Shoshani
Observations Of Elephants In East And Southern Africa, Jeheskel Shoshani
Elephant
Selected short observations on African elephants (Loxodonta africana) made during 1978 in East and Southern Africa.
Iucn/Wwf Help Wanted, Elephant Editors
Iucn/Wwf Help Wanted, Elephant Editors
Elephant
A published plea from the IUCN/World Wildlife Fund Conservation Programme in Indonesia asking for information regarding endangered elephants in Sumatra.
Elephant Symposium And Related Activities, Elephant Editors
Elephant Symposium And Related Activities, Elephant Editors
Elephant
Agenda for the upcoming Elephant Symposium at the American Society of Mammalogists 59th Annual Meeting, June 20th, 1979.
Information From The Elephant Interest Group Questionnaire, Elephant Editors
Information From The Elephant Interest Group Questionnaire, Elephant Editors
Elephant
Elephant-related activities of answering respondents to the newsletter's questionnaire.
Report On The Elephants Of Tongaland, Clive Walker
Report On The Elephants Of Tongaland, Clive Walker
Elephant
Report from a preliminary survey of elephants in Southern Africa by the Endangered Wildlife Trust Elephant Group.
Financial Report And Acknowledgments, Elephant Editors
Financial Report And Acknowledgments, Elephant Editors
Elephant
Accounting of the Elephant Interest Group for production of the journal.
Bibliography, Elephant Editors
Bibliography, Elephant Editors
Elephant
Updates to the selected bibliography covering references from 1970 - mid-1979.