Animal Sciences Commons^™

Second Specimen Of Oryzomys Dimidiatus, Hugh H. Genoways, J. Knox Jones Jr.

University of Nebraska State Museum: Mammalogy Papers

The species Oryzomys dimidiatus was originally named and described by Thomas (Annals of the Museum of Natural History, series 7, 15: 584-591, 1905) as a member of the genus Nectomys on the basis of a single specimen from the Rio Escondido, 7 miles below Rama, Nicaragua (approximately 1 km. S and 8½ km. E Ranla, 20 m, Zelaya), obtained by W. G. Palmer on November 5, 1904. Although there has been speculation on the relationships of this taxon (currently regarded as the only member of the subgenus Micronectmays, genus Oryzomys--see Hershkovitz, Journal of Mammalogy, 51: 789-794, 1970, …

Whole Issue Nebraska Bird Review (September 1971) 39(3)

Nebraska Bird Review

TABLE OF CONTENTS

Status of the Common Loon in Nebraska: A Summer Occurrence in Lancaster County................. 42

1971 (Forty-sixth Spring Migration and Occurrence Report................. 45

Some Interesting Summer Bird Records for Lancaster County in 1970 .................58

Activities of the Yellow-bellied Sapsucker in the Kearney, Nebraska Area .................60

Notes................. 62

In Memoriam .................64

Comparison Of Estimated Daughter Superiority From Pedigree Records With Daughter Evaluation, L. Dale Van Vleck, H. W. Carter

Department of Animal Science: Faculty Publications

Daughter superiorities of 240 Holstein bulls of the American Breeders Service and Eastern Artificial Insemination Cooperative (EAIC) were estimated from records of paternal sisters of the sire, dam's records, and records of daughters of the maternal grandsire. Estimated daughter superiority (EDS) was then compared with the U.S. Department of Agriculture's predicted difference for American Breeders Service bulls and with the Northeast Sire Comparison for EAIC bulls. The regression equation on estimated daughter superiority was [-84 + .561(EDS)] kg for American Breeders Service bulls and [-227 + .654(EDS)] kg for EAIC bulls. The response is not as large as theoretically predicted …

Estimation Of Heritability Of Threshold Characters, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

Many traits of dairy cattle such as disease resistance and type breakdown scores may have an underlying distribution of values which are approximately normal but must be measured on a yes or no basis. Theory from literature suggests that heritability estimated from such binomial data is only z²/p(1-p) as large as heritability if it could be measured on the normal scale where z is the ordinate on the normal distribution at the threshold point corresponding to a fraction p of the population having the character. Data were generated from a pseudo-normal distribution to test this theory for estimates …

Notes On The Biology Of The Central American Squirrel, Sciurus Richmondi, J. Knox Jones Jr., Hugh H. Genoways

University of Nebraska State Museum: Mammalogy Papers

Additional specimens of Sciurus richmondi are reported, along with comments on variation, distribution, reproduction and molt in this little known squirrel. As presently understood, S. richmondi occurs only in the Caribbean rain forests of Nicaragua. Significant secondary sexual variation in adults was found only in zygomatic breadth, in which females are the larger. Available evidence reveals that the breeding season extends at least from February to September, and suggests two seasonal molts annually.

A New Species Of Spiny Pocket Mouse (Genus Liomys) From Jalisco, Mexico, Hugh H. Genoways

University of Nebraska State Museum: Mammalogy Papers

In the course of a systematic revision of the spiny pocket mice of the genus Liomys, a series of large, brightly colored mice from several localities in southeastern Jalisco was studied. Individuals in this series appeared to be morphologically distinct from mice typical of Liomys pictus plantinarensis Merriam. 1902, taken in the same traplines at several localities, and from specimens of Liomys irroratus jaliscensis (J. A. Allen, 1906), a taxon that also occurs in southeastern Jalisco. The current studies now have progressed to the point where the large and distinctively colored mice from Jalisco can be defined as a …

Whole Issue Nebraska Bird Review (June 1971) 39(2)

Nebraska Bird Review

Table of Contents

Turkey Vulture Nesting Records for Nebraska - A New Record for Sheridan County ................19

A Lancaster County Record for the Surf Scoter ................21

1970 (Thirteenth) Fall Occurrence Report................22

The Seventieth Annual Meeting................ 36

Notes ................37

Book Review ................40

Systematics Of Southern Banner-Tailed Kangaroo Rats Of The Dipodomys Phillipsii Group, Hugh H. Genoways, J. Knox Jones Jr.

University of Nebraska State Museum: Mammalogy Papers

Both nongeographic and geographic variation was assessed in southern banner-tailed kangaroo rats of the nominal species Dipodomys phillipsii and D. ornatus . Univariate and multivariate analyses were employed in consideration of geographic variation. D. ornatus is arranged as a subspecies of D. phillipsii, in which four races (phillipsii, ornatus, perotensis, and oaxacae) are recognized. Some observations on natural history also are included.

Type Appraisal: Ii. Variation In Type Traits Due To Sires, Herds, And Years, H. D. Norman, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

Variance components were estimated from type appraisal data to determine the importance of year, herd, sire, and herd x sire effects upon 49 body, udder, and management traits. Estimates were based on over 16,000 appraisals on daughters of Holstein artificial insemination sires. The variation explained by these effects never exceeded 34% of the total variance. Year effects were almost nonexistent (-2 to 3%). Herd effects were small for all traits except feeding speed, body weight, intensity and persistency of edema, and ketosis, and never exceeded 25%.

Most appraisal traits had low heritabilities. The estimate for milking speed was .23 while …

Type Appraisal: I. Effects Of Age And Stage-Of-Lactation On Type Ratings, H. D. Norman

Department of Animal Science: Faculty Publications

Dairy cattle type appraisal data were examined to determine whether body and udder conformation and management ratings were affected by age and period of lactation at appraisal. Data were collected from 1961 to 1968 from 188 herds having over 23,000 Holstein type appraisals. The body and udder traits were scored by scheduled appraisers, and the management traits were coded by each dairyman. Some of the 35 original traits were composed of more than one descriptive characteristic and, as a result, 49 renamed traits were derived from these.

A model was selected that considered years and herds as well as cow …

Type Appraisal: Iii. Relationships Of First Lactation Production And Type Traits With Lifetime Performance, H. D. Norman, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

Phenotypic and genetic correlations were estimated between 48 type appraisal traits and first lactation milk production to determine the importance of appraisal traits in a breeding program from 5,024 records from the New York type appraisal program. Most phenotypic correlations among the type traits were near zero. Depth of udder was the appraisal trait having the highest correlation with first lactation milk (.27) and fat (.23). Multiple correlations of all appraisal traits with first lactation milk and fat were .44 and .40.

Correlations with lifetime variables were calculated from 2,068 records meeting time qualifications. Of the first lactation variables, milk …

Whole Issue Nebraska Bird Review (March 1971) 39(1)

Nebraska Bird Review

TABLE OF CONTENTS

Treasurer's Report ....................2

Pileated Woodpecker in Otoe County ....................3

1970 Christmas Count ....................4

Winter Meeting ....................9

1970 Nebraska Nesting Survey ....................10

Notes ....................15

In Memoriam ....................16

Morphological Variation In Stenoderma Rufum, J, Knox Jones Jr., Hugh H. Genoways, Robert J. Baker

University of Nebraska State Museum: Mammalogy Papers

For more than 100 years, the red fruit-eating bat, Stenoderma rufum Desmarest, 1820, was known only by a specimen of unknown geographic provenience. Anthony ( 1918, 1925) rediscovered Stenoderma in Puerto Rican cave deposits, but the first living specimens to be reported since the original description were taken on St. John in the Virgin Islands (Hall and Bee, 1960). Subsequently, Tamsitt and Valdivieso (1966) recorded living representatives from Puerto Rico-from a population later named and described as a distinctive subspecies, Stenoderma rufum darioi, by Hall and Tamsitt (1968). The latter authors also reported a specimen of S. r. rufum …

Genetic And Environmental Aspects Of Udder Infections, J. W. Wilton, L. Dale Van Vleck, R. W. Everett, R. S. Guthrie, S. J. Roberts

Department of Animal Science: Faculty Publications

Information on the presence or absence of bacterial infections and abnormal secretions in each quarter of cows in their initial survey on the New York State Veterinary College Mastitis Program was used to obtain several criteria of udder infection. Year-season and stage of lactation effects were statistically significant for several criteria of infection in first, second, and later lactation groups but did not explain much of the variation in any infection criterion. Age within first and second lactation group also accounted for little of the variation in infection although age within later lactations accounted for up to 5% of the …

Block And Bridle Annual, 1971

Block and Bridle Annual (1933–2021)

Contents:

The Emblem
Staff Comments
An Address from the Department Chairman
Animal Sci Faculty
Report from 1970 National Meeting
Faculty Advisors to Block and Bridle
1971-1972 Officers
A Message from the President
Committee Chairmen
1971 Membership
Seniors
Block and Bridle Deadline
Quarter Horse Show
Livestock Judging Contest
Meat Judging Contest
Spring Steak Fry
Janike 1970 B & B Honoree
Honors Banquet
State Fair Trophies
Animal Science Department Complex
Little Ak-Sar-Ben
1870 Ham Sales a Success
B & B Queen Contest: Sue Vierregger
1970-71 Program Revue
Spring Tour
Tour Itinerary
Meats Teams
Meats’ Teams Records
Livestock Team Records

Experimental Hybridization Of The New World Quail (Odontophorinae), Paul A. Johnsgard

Papers in Ornithology

Hybridization experiments among six species of New World quail currently placed in four genera (Colinus, Callipepla, Lophortyx, and Oreortyx) involved the establishment of nine mixed-pair combinations. Seven of these combinations resulted in the production of F₁ offspring, and individuals representing five intergeneric crosses have been reared to maturity. These F₁ individuals exhibited a hatchability at least as high as occurred in parental species matings. In four of five intergeneric crosses, the hybrid females have laid smaller-than-normal eggs in spite of average or higher-than-average egg production, and a high proportion of eggs females laid have been …

Observations On Sound Production In The Anatidae, Paul A. Johnsgard

Paul Johnsgard Collection

It has been known for a long time that, among non-passerine birds, the Anatidae are remarkable for the diversity of specializations in the trachea and syrinx, associated with sound production. It has also been recognised that these variations have taxonomic significance (Heinroth 1911; Johnsgard 1961), but virtually no attempts have been made to correlate the complex tracheal structures with the sounds produced. Yet the group offers many fascinating problems such as the adaptive significance of the looping of the trachea, either outside the body cavity as in the Magpie Goose Anseranas semipalmata, or inside the sternum as in the …

Morphology Of The Spores Of Myxosoma Cerebralis (Hofer, 1903) And M. Cartilaginis (Hoffman, Putz, And Dunbar, 1965)*, Glenn L. Hoffman, Jiří Lom

United States Fish and Wildlife Service: Publications

The spore of Myxosoma cerebralis is redescribed and compared with that of a close relative, M. cartilaginis. M. cerebralis is smaller, with greater variability in size and shape. It possesses a mucous envelope whereas M. cartilaginis does not. The surface architecture of M. cerebralis, as seen with the scanning electron microscope, differs in possessing a conspicuous circumsutural groove, prominent polar filament pores, and a mucous envelope.

Bacula Of Some Neotropical Bats, Randall E. Brown, Hugh H. Genoways, J. Knox Jones Jr.

University of Nebraska State Museum: Mammalogy Papers

Neotropical bats representing 56 species of five families were examined for presence or absence of a baculum. Members of the families Noctilionidae and Phyllostomatidae (sensu lato) have no os penis, but the bone was found in all species studied of Emballonuridae, Natalidae, and Vespertilionidae. The bacula of seven emballonurids, one natalid, and seven vespertilionids are briefly described and figured.

Whole Issue Nebraska Bird Review (Dec 1970) 38(4)

Nebraska Bird Review

TABLE OF CONTENTS

1970 (Forty-fifth) Spring Migration and Occurrence Report ................74

1970 Fall Field Day ................87

Book Review ................88

Notes ................88

Index of Volume XXXVIII ................93

Additional Notes An Some Mammals From Eastern Nebraska, Hugh H. Genoways, Jerry R. Choate

University of Nebraska State Museum: Mammalogy Papers

Field studies concerned primarily with distribution of the short-tailed shrew, Blarina brevicauda, in eastern Nebraska have resulted in noteworthy records of several other species of small mammals. These field studies, which were supported by a grant from the Kansas Academy of Science, entailed extensive trapping of prairie habitats in Cass County, approximately 15 miles west of the Missouri River. In addition to the species discussed below, specimens of Reithrodontomys megalotis, Peromyscus maniculatus, P. leucopus, and Mus musculus were obtained at several localities. All catalogue numbers in the following accounts refer to specimens deposited in the Museum of Natural …

Whole Issue Nebraska Bird Review (Sept 1970) 38(3)

Nebraska Bird Review

CONTENTS

Introduction ............................................................... 43

Description of Gage County ................................................................ 43

Check-list of Gage County Birds-Introduction ............................ 44

Definitions of Terms ................................................................................ 45

Loons; Grebes ............................................................................................ 45

Pelicans; Cormorants; Herons, Egrets, and Bitterns; Geese ........................................................................ 46

Ducks .............................................................. 47

Mergansers; Vultures; Kites and Hawks ............................................ 48

Eagles and Harriers; Osprey; Falcons ................................................ 49

Grouse; Quail and Pheasants; Turkeys; Cranes; Rails, Gallinules and Coots; Plovers and Killdeer; Woodcock ........................................................ 50

Snipe, Curlews, Sandpipers, and Godwits ........................................ 51

Avocets; Phalaropes; Gulls and Terns; Doves; Cuckoos; Barn Owl ............................................................................................ 52

Typical Owls; Poor-will and Nighthawks; Swifts; Hummingbirds; Kingfishers .......................................................... 53

Woodpeckers; Kingbirds and Flycatchers …

Selection On Test-Day Fat Percentage And Milk Production, J. F. Keown, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

Selection procedures which weight equally each test day sample may not be optimum for selection on test days.

Monthly test day data from 63,300 records of artificially sired Holsteins with 305-day lactations were from the New York Dairy Records Processing Laboratory. Heritabilities (h 2) were estimated intraherd-year- season from sire components of variance for monthly test day production within lactations 1, 2, 3, 4, and 5 or greater. Heritability of lactation fat percentage decreased from .60 to .40 from first to fifth lactations whereas heritability for 305-day milk yield increased slightly from .25 to .37 with succeeding lactations. Heritabilities for …

Taxonomy Of The Neotoma Albigula-Group Of Woodrats In Central Mexico, E. Raymond Hall, Hugh H. Genoways

University of Nebraska State Museum: Mammalogy Papers

Study of specimens collected from critical localities since 1944 reveals that: Neotoma montezumae and N. leucodon zacatecae are indistinguishable from earlier named taxa; N. latifrons is a subspecies of an earlier named taxon; and N. palatina, previously known from only one specimen and thought by some mammalogists to be merely an aberrant individual of Neotoma albigula, is a species distinct from N. albigula as Goldman tentatively decided when he named it 64 years ago. In the narial passage, the partition formed by the vomer that extends well behind the hard palate as a sword-like projection is present in …

Harvest Mice (Genus Reithrodontomys) Of Nicaragua, J. Knox Jones Jr., Hugh H. Genoways

University of Nebraska State Museum: Mammalogy Papers

Harvest mice of the genus Reithrodontomys first were reported from Nicaragua by Oldfield Thomas (1907), who originally described Reithrodontomys sumichrasti modestus based on a single specimen from Jinotega. J. A. Allen (1908, 1910) recorded additional specimens of R. s. modestus, which still was the only species known from the country when A. H. Howell (1914) revised the genus Reithrodontomys. In his thorough review of Latin American harvest mice, Hooper (1952) added a second species, Reithrodontomys mexicanus lucifrons, to the Nicaraguan fauna, and Englert (1959) and Anderson and Jones (1960) recorded three additional kinds. The present report treats …

Bibliography Of Diseases And Parasites Of Marine Fish And Shellfish (With Emphasis On Commercially Important Species), Carl J. Sindermann

Harold W. Manter Laboratory of Parasitology: Faculty Publications

The literature on diseases and parasites of marine animals has been accumulating at an accelerating rate in recent decades, and at a seemingly geometrical rate in the past few years. Reviews of selected aspects of the subject have appeared (Cheng, 1967; Sindermann, 1966; Sindermann and Rosenfield, 1967). References listed in these papers include a significant, but still a small part, of the available literature. With the proliferation of journals in many languages throughout the world, a complete bibliography, even in a narrow area of research, is almost an impossibility. Then too, the daily appearance of new published information represents an …

Misidentification And Sire Evaluation, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

Biases in evaluation of sires result from misidentified records in the sire group averages used for sire evaluation. The bias increases as the fraction of misidentified cows increases. Use of variance components estimated from misidentified records also contributes to the bias. Estimates of the correlation between estimated and true genetic value, as well as estimates of genetic progress due to selection, are biased when misidentified records are included in sire group averages.

Whole Issue Nebraska Bird Review (June 1970) 38(2)

Nebraska Bird Review

TABLE OF CONTENTS

Dragonfly Migrations Observed in Nebraska in 1969 ..................22

Sandhill Cranes ..................23

The Sixty-ninth Annual Meeting ..................26

1969 (Twelfth) Fall Occurrence Report ..................27

Notes ..................40

Misidentification In Estimating The Paternal Sib Correlation, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

Misidentification of sires of cows in paternal half-sib analyses of variance biases the estimate of heritability downward. Four models o£ misidentification yield approximately the same reductions in estimated heritability. The reduced estimates are approximately p² of the actual heritability where p is the fraction of cows whose sire is correctly identified. The reduction in heritability estimates from daughter-dam regression would be to a fraction, p, of the actual heritability where p is the fraction of dams correctly identified. Empirical paternal sib analyses of New York Dairy Herd Improvement Holstein records suggest that misidentification is more common among grade cows …

Effects Of Age, Herd, And Herd Status On Classification Scores Of Jersey Cattle, H. L. Barr, H. W. Carter, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

Classification was arranged for herds belonging to the official Jersey program concurrently with classification for Jersey research herds. Herds were categorized as official, registered research and grade research. Cattle were also grouped as 2 year olds, 3 to 4 year olds and 5 year olds.

Differences for herd status were significant (P < .05) for all type traits except stature, breed character, feet and legs and fore udder. Research cattle scored higher only in dairy character and udder quality. Differences between registered research and grade research cattle were not significant.

Differences for age were significant for all traits except feet and legs, mammary and rear udder. Five year-olds scored highest in final score, general appearance, stature, breed character, back and rump, and chest and barrel. The traits relating to mammary system were scored higher on younger cows.

For …