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Articles 31651 - 31680 of 36464
Full-Text Articles in Entire DC Network
The Rhode Island Quahogger: Candidate For The List Of Endangered Species?, James M. Korney
The Rhode Island Quahogger: Candidate For The List Of Endangered Species?, James M. Korney
Marine Affairs Theses and Major Papers
It is the hypothesis of this paper that today the livelihood of the independent Narragansett Bay quahogger is faced with two potentially dangerous threats; water pollution in upper Narragansett Bay and the prospect of an expanding aquaculture industry in the lower bay. Unless the state of Rhode Island properly interprets and enforces existing state legislation to protect the quahoggers interests, his very livelihood will be jeoprodized. This paper will examine the legal, political, economic, and environmental affects of water pollution in upper Narragansett Bay and an expanding aquaculture industry in the lower bay in their relation to the Rhode Island …
Municipal Sewage Treatment: Problems And Considerations, George R. Johnson
Municipal Sewage Treatment: Problems And Considerations, George R. Johnson
Marine Affairs Theses and Major Papers
The coastal areas are vital to the economic and physical well being of the United States. Virtually every facet of our way of life is related in some fashion to these coastal areas. Ocean borne transportation moves not only vast quantities of raw materials, but also many of the intermediate and final products that are then manufactured to their related market areas. Fisheries provide vast amounts of food and employment for many of our people. In addition, the coasts are a continuing source of enjoyment and recreation for millions of our citizens. Coastal waters provide much of the water necessary …
Fight For Alternatives Gathers Momentum
Fight For Alternatives Gathers Momentum
Close Up Reports
Commitments to help lab animals are extracted from industry and government
Genetic And Phenotypic Relationships Between Pubertal And Growth Characteristics Of Gilts, L. K. Hutchens, R. L. Hintz, R. K. Johnson
Genetic And Phenotypic Relationships Between Pubertal And Growth Characteristics Of Gilts, L. K. Hutchens, R. L. Hintz, R. K. Johnson
Department of Animal Science: Faculty Publications
Data on 737 crossbred and purebred gilts were used to obtain heritability estimates for age at puberty (AGEPUB) and weight at puberty (WTPUB) and their genetic and phenotypic correlations with birth weight (BW), weaning weight (WW), postweaning daily gain (ADG), adjusted age at 90.7 kg (AGE) and adjusted backfat at 90.7 kg (BF). The heritability estimates for AGEPUB were low to moderate (.19 and .40, based upon paternal and maternal half-sib estimates, respectively.) The genetic (rg) and phenotypic (rp) correlations between AGEPUB and BW (rg = -.07; rp = -.09), WW (rg = -.25; rp = …
Incorporation Of Carbon-14 Metabolites Into The Sex Pheromon 26-Dichlorophenol Of Dermacentor Andersoni Stiles; And The Disruption Of Pheromone Activity In D. Andersoni And D. Variabilis (Say) By Quinones, Daniel Martin Gainsburg
Incorporation Of Carbon-14 Metabolites Into The Sex Pheromon 26-Dichlorophenol Of Dermacentor Andersoni Stiles; And The Disruption Of Pheromone Activity In D. Andersoni And D. Variabilis (Say) By Quinones, Daniel Martin Gainsburg
Biological Sciences Theses & Dissertations
The Rocky Mountain wood tick, Dermacentor andersoni Stiles, injected with (u-14c) sodium acetate or DL-(benzene ring-u-14c) tryptophan for in vivo studies, was found to produce sex pheromone, 2,6-dichlorophenol, containing 14c activity. Ambiguous results were obtained with L-(u- 14c) tyrosine, and no incorporation of 14c label into pheromone was observed with DL-(ring-u- 14c) phenylalanine or DL-(side chain-3-14c) tyrosine. Attempts were made to determine the site of synthesis, but in vitro studies proved inconclusive.
Disruption of sex pheromone activity in D. andersoni and the American dog tick, D. variabilis (Say) was achieved …
Growth And Recruitment Of Two Penaeids In The Bay Of St. Louis, Mississippi During 1979, Teresa C. Heaton
Growth And Recruitment Of Two Penaeids In The Bay Of St. Louis, Mississippi During 1979, Teresa C. Heaton
OES Theses and Dissertations
Juvenile brown (Penaeus aztecus, Ives) and white (Penaeus setiferus, Linnaeus) shrimp were collected from two stations of a nursery area in St. Louis Bay Mississippi, during May to October, 1979. Periods of shrimp recruitment and growth were determined to discern whether the concurrent environmental variables of salinity and temperature had an influence on shrimp abundance and yield. Growth estimates were obtained from length frequency measurements of trawl samples taken over a 24-h period per month from each station. An analysis of variance of length versus the variables of sex, month, station, time of day, salinity and …
A Multivariate Study Of The Family Molossidae (Mammalia, Chiroptera) : Morphology, Ecology, Evolution, Patricia W. Freeman
A Multivariate Study Of The Family Molossidae (Mammalia, Chiroptera) : Morphology, Ecology, Evolution, Patricia W. Freeman
University of Nebraska State Museum: Mammalogy Papers
The purpose of my study is to examine as many species of the family Molossidae as possible and to determine, with the aid of numerical methods, what natural groups exist within the family. Sneath & Sokal (1973) discuss the methods and reasons for this kind of analysis. A natural group of organisms as here defined is one in which its members share a close phenetic relationship. Phenetic relationship is defined as "similarity (resemblance) based on a set of phenotypic characteristics of the objects or organisms under study," (Sneath & Sokal, 1973, p. 29), and is distinct in definition from phylogenetic …
1981 Little International Agricultural Exposition Catalog, Little International Agricultural Exposition South Dakota State University
1981 Little International Agricultural Exposition Catalog, Little International Agricultural Exposition South Dakota State University
Little International "Little I" Agricultural Exposition Catalogs
No abstract provided.
Museums Are More Than Elephant Graveyards, Patricia W. Freeman
Museums Are More Than Elephant Graveyards, Patricia W. Freeman
University of Nebraska State Museum: Mammalogy Papers
I suspect many people do not know what natural history museums are all about. These museums hold nature's works of art, instead of just man's. There are not many museums of natural history and those few are usually in big cities.
Field Museum of National History in Chicago is one of the largest in the world, along with the British Museum of Natural History in London, the Smithsonian (U.S. National Museum) in Washington, and the American Museum of Natural History in New York. These are the museums that have the actual skeletons of dinosaurs, or stuffed elephants, poised in combat, …
Notes [March 1981]
Nebraska Bird Review
Notes
WHITE-WINGED SCOTER. On 1 May 1980 I had a White-winged Scoter in the yard, at most times not more than 15 to 20 feet away from me. It was here an hour or so before the neighbor's cat caused it to fly. I take it that it was very tired or sick because it would just keep moving enough that I couldn't get any closer.
-Mrs. Don Lockwood
COOPER'S HAWK. A commotion in the top of a pine tree drew my attention. A Blue Jay was being chased by a hawk, whose wings could be heard beating against the …
1980 Nebraska Nesting Survey, Esther V. Bennett
1980 Nebraska Nesting Survey, Esther V. Bennett
Nebraska Bird Review
Data on the 1980 nesting season in Nebraska were received from nineteen observers, reporting on fifty-seven species from twenty-four counties. Counties in the tabulation are listed in a west to east order, with the northernmost of approximately equal locations given first.
Book Reviews [March 1981]
Nebraska Bird Review
Reviews of The Mystery of Migration edited by Dr. Robin Baker (Viking Press, 256 pages, 81/2 x 11, indexed, hardbound, $29.95) and How to Control House Sparrows by Don Grussing (Roseville Publishing House, 52 pages, 51/2 x 81/2, paperbound, $3.95).
Masthead From Nebraska Bird Review (March 1981) 49(1)
Masthead From Nebraska Bird Review (March 1981) 49(1)
Nebraska Bird Review
Published quarterly in March, June, September, and December by the Nebraska Ornithologists' Union Inc. as its official journal and sent free to all members who are not in arrears for dues. Subscriptions (on a calendar year basis only) are $6.00 per year in the United States and $7.00 per year in all other countries, payable in advance. Single numbers are $1.75 each, postpaid.
Memberships (on a calendar year basis only): Student. $3.00: Active, $7.00; Sustaining, $tS.DO; Family Active, $10.00; Family Sustaining, $20.00; Life, $100.00.
Whole Issue Nebraska Bird Review (March 1981) 49(1)
Whole Issue Nebraska Bird Review (March 1981) 49(1)
Nebraska Bird Review
Table of Contents
1980 Treasurer's Report .....................2
1980 Christmas Count .....................2
Book Reviews..................... 7
1980 Nebraska Nesting Survey .....................8
Notes .....................11
1980 Christmas Count
Nebraska Bird Review
One hundred and two species (three more than last year) were reported in the 1980 Christmas Count, and three species (two more than last year) were reported present during the count week but not seen on the count day. These increases were in spite of one less count Crawford - this year. Two additional races were reported, compared to three last year. The individual count this year was 317,910, compared to 188,102 last year, with the Snow Goose count at Omaha, particularly, and at DeSoto and the Mallard count at DeSoto accounting for more than the difference between the two …
Volume 48 Number 4 Of Review Mis-Marked
Volume 48 Number 4 Of Review Mis-Marked
Nebraska Bird Review
The last two issues of Volume 48 of the Review were both marked (on the front cover) "Volume 48 September, 1980 Number 3". The page numbers will distinguish between the two issues, but an easy mark is that the true Number 4 shows part of the index on the back cover. Those who save their copies of the Review should correct the entry on the issue containing the index to read "December" and "4" to prevent confusion in the future.
1980 Treasurer's Report
Nebraska Bird Review
One-page spreadsheet constituting the Nebraska Ornithologists' Union treasurer's report at year end (December 31) of 1980. The grand total is $4,344.48.
Review Of The Island Waterfowl By Milton W. Weller, And The Hawaiian Goose: An Experiment In Conservation By Janet Kear And A. J. Berger, Paul A. Johnsgard
Review Of The Island Waterfowl By Milton W. Weller, And The Hawaiian Goose: An Experiment In Conservation By Janet Kear And A. J. Berger, Paul A. Johnsgard
Paul Johnsgard Collection
Both of these books deal with insular species of waterfowl. The volume by Weller concentrates on the ecological forces that have shaped the compar- ative ecologies and morphologies of some 30 forms of Anatidae that are confined to the islands of the world; the Kear and Berger book deals with the interesting history of the ill-fated Hawaiian goose, or nene, which has at least temporarily been saved from extinction by heroic conservation measures of the Wildfowl Trust and Hawaiian wildlife personnel.
A New Species Of Rhynchomys (Muridae) From The Philippines, Guy G. Musser, Patricia W. Freeman
A New Species Of Rhynchomys (Muridae) From The Philippines, Guy G. Musser, Patricia W. Freeman
University of Nebraska State Museum: Mammalogy Papers
". . . Mr. Whitehead has made a most wonderful and unexpected discovery, that of a new and peculiar Mammal-fauna inhabiting the Luzon highlands, and, so far as is yet known, mostly isolated on a small plateau on the top of Monte Data, in the centre of Northern Luzon, at an altitude of from 7000 to 8000 feet." With this dramatic announcement, Oldfield Thomas (1898:377) introduced to naturalists the spectacular rats found by Whitehead: Crateromys schadenbergi, Carpomys melanurus, C. phaeurus, Batomys granti, Chrotomys whiteheadi, Celaenomys silaceus, and Rhynchomys soricoides. One of the most interesting of these to Thomas was …
Correspondence Of Food Habits And Morphology In Insectivorous Bats, Patricia W. Freeman
Correspondence Of Food Habits And Morphology In Insectivorous Bats, Patricia W. Freeman
University of Nebraska State Museum: Mammalogy Papers
In a morphometric study of molossid bats (Freeman, in press), I found that the first principal component (PC) reflected overall size. The second PC was concerned with a suite of jaw and skull measurements that separated molossids with thicker jaws, fewer but larger teeth, and welldeveloped cranial crests (i.e., bats with robust skulls) from those with thinner jaws, more but smaller teeth, and less developed cranial crests. Subsequently, I found (Freeman, 1979) that molossids with robust skulls ate hard-shelled insects such as beetles. and that molossids with gracile skulls ate soft-bodied insects such as moths. Given these conclusions I was …
Kentucky Warbler (Vol. 57, No. 1), Kentucky Library Research Collections
Kentucky Warbler (Vol. 57, No. 1), Kentucky Library Research Collections
The Kentucky Warbler
No abstract provided.
Relationship Between Production And Stayability In Holstein Cattle, G. F. S. Hudson, L. Dale Van Vleck
Relationship Between Production And Stayability In Holstein Cattle, G. F. S. Hudson, L. Dale Van Vleck
Department of Animal Science: Faculty Publications
Records from 97,555 first daughters of 1,487 Holstein sires in artificial insemination were used to estimate components of variance and covariance of first lactation milk and fat production and stayability to 36, 48, 60, 72, and 84 mo of age. Henderson's Method 3 was used with a model including fixed herd-year- season and genetic group effects and random sire within group and residual effects. Heritabilities for milk and fat production and 36-, 48-, 60-, 72-, and 84-mo stayability were .31, .30, .02, .04, .05, .05, and .05. Genetic and phenotypic correlations between milk production and stayability ranged from .47 to …
Observations On Bats From Trinidad, With A Checklist Of Species Occurring On The Island, Catherine H. Carter, Hugh H. Genoways, Robert S. Loregnard, Robert J. Baker
Observations On Bats From Trinidad, With A Checklist Of Species Occurring On The Island, Catherine H. Carter, Hugh H. Genoways, Robert S. Loregnard, Robert J. Baker
University of Nebraska State Museum: Mammalogy Papers
In their comprehensive treatment of the bats of Trinidad, Goodwin and Greenhall (1961) reported 58 species from the island. Subsequent authors (Goodwin and Greenhall, 1962, 1964; Genoways et al., 1973a; LaVal, 1973a, 1973b) have added some species to the list and changed the status of others so that the known chiropteran fauna of Trinidad now comprises 64 species: five emballonurids, one noctilionid, four mormoopids, 36 phyllostomids (see Handley, 1980, for family-group names), one natalid, one furipterid, one thyropterid, seven vespertilionids, and eight molossids. Among the phyllostomids, the subfamilies Phyllostominae (15) and Stenodermatinae (14) are the best represented, whereas only a …
A Survey Of The Mussels (Pelecypoda: Unionoidia: Unionacea) Of Twelvepole Creek, West Virginia With A Study Of Commensal Algae Found On Selected Mussels, Kevin Joe Smith
A Survey Of The Mussels (Pelecypoda: Unionoidia: Unionacea) Of Twelvepole Creek, West Virginia With A Study Of Commensal Algae Found On Selected Mussels, Kevin Joe Smith
Theses, Dissertations and Capstones
A survey of the Unionacea of Twelvepole Creek, West Virginia was conducted coupled with a qualitative study of commensal algae found on selected mussel species. The naiads and the algae were found to have diverse populations. Naiads collected during the survey were represented by 23 species, 16 genera and 2 families. Corbicula fluminea was found to be confined largely to the main branch of Twelvepole, with no individuals being collected from the East or West Forks and only limited collections near the mouth of Beechfork Creek. Lampsilis radiata luteola and L. ventricosa were found to have the greatest distribution, being …
The Naiads (Mollusca: Unionidae) From Two Prehistoric Sites Along The Ohio River, Mason County, West Virginia, Beverly Dawn Spurlock
The Naiads (Mollusca: Unionidae) From Two Prehistoric Sites Along The Ohio River, Mason County, West Virginia, Beverly Dawn Spurlock
Theses, Dissertations and Capstones
Archeological naiad valves representing 29 species were recovered from two Late Prehistoric Indian villages along the Ohio River, Mason County, West Virginia. Surface collections and limited excavation provided a total of 1,599 identifiable valves and valve fragments. Differences in species compositions and relative abundances between the two middens were noted. Samples from the Rolf Lee Farm Site (46MS51) contained 28 species while the Lewis-Old Town Farm Site (46MS57) produced only 23 species. Comparisons were made with other nearby prehistoric shell deposits and also with more recent twentieth century collections from this reach of the river. Nine of the archeological species …
Food Habits Of Largemouth Bass, Micropterus Salmoides (Lacepede) And Spotted Bass, Micropterus Punctulatus (Rafinesque), From Beech Fork Reservoir, A New Impoundment In Wayne And Cabell Counties, West Virginia, Michael A. Arcuri
Theses, Dissertations and Capstones
A study was undertaken to determine the food habits of two game fishes, the largemouth bass Micropterus salmoides (Lacepede) and the spotted bass M. punctulatus (Rafinesque) in Beech Fork Reservoir shortly after its impoundment. A total of 171 largemouth bass and 95 spotted bass were collected from July 1978, through June 1979, and their stomach contents analyzed.
Largemouth bass fed primarily on fishes, particularly young-of-the-year bluegill. Aquatic and terrestrial invertebrates were also important food items, especially during the spring and fall . The dominant aquatic forms were chironomid larvae and pupae while the dominant terrestrial forms were adult dipterans.
Spotted …