Poultry or Avian Science Commons^™

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

Michael P Lombardo

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 that a …

Homosexual Copulations By Male Tree Swallows, Michael P. Lombardo, Ruth M. Bosman, Christine A. Faro, Stephen G. Houtteman, Timothy S. Kluisza

Michael P Lombardo

Homosexual courtship behavior in non-human animals is well known (Ford and Beach 1980) and occurs in a wide variety of taxa. However, homosexual copulations, especially between males, are less well known. In birds, males mounting other males have been observed in the colonially breeding Cattle Egret (Bubulcus ibis) (Fujioka and Yamagishi 1981) and Common Murre (Uria aalge) (Birkhead et al. 1985, Hatchwell 1988). Neither Fujioka and Yamagishi (1981) nor Birkhead et al. (1985) and Hatchwell (1988) reported whether cloacal contact occurred during their observations of male-male mountings. Here we describe homosexual copulations by male Tree Swallows …

Individual, Temporal, And Seasonal Variation In Sperm Concentration In Tree Swallows, Michael Lombardo, Armetris Forman, Matthew Czarnowski, Patrick Thorpe

Michael P Lombardo

We determined sperm concentrations in Tree Swallows (Tachycineta bicolor) by manually expressing semen samples from males during prelaying, egg-laying, incubation, and nestling periods. Sperm concentrations varied by orders of magnitude (0-109 sperm mL-1) among males. Sperm concentrations were highest during the incubation period and lowest during the prelaying period. None of the samples collected during the prelaying, egg-laying, and incubation periods were devoid of sperm. In contrast, 45% of samples collected during the nestling period lacked sperm. Sperm concentrations (1) did not vary over the course of the morning during prelaying, egg-laying, and incubation periods but significantly increased during the …

Microbial Colonization Of The Cloacae Of Nestling Tree Swallows, Tamara Mills, Michael Lombardo, Patrick Thorpe

Michael P Lombardo

Microbes have the potential to be important selective forces in many aspects of avian biology. Microbes can affect fitness as a result of either their pathogenic or beneficial effects on host health. Little is known about the chronology of microbial colonization of nestlings or the effects of microbes on fledgling condition. We set out to (1) characterize the time course of microbial colonization of the cloacae of nestling Tree Swallows (Tachycineta bicolor), (2) examine the relationship between cloacal microbes and fledgling condition, and (3) determine if nest mates had similar assemblages of cloacal microbes. We repeatedly measured nestlings and sampled …

Within-Pair Copulations: Are Female Tree Swallows Feathering Their Own Nests?, Michael Lombardo

Michael P Lombardo

A variety of hypotheses has been proposed to explain why socially monogamous birds copulate repeatedly with their mates when only a single copulation is necessary to fertilize an entire clutch (Birkhead and Møller 1992, Petrie 1992, Hunter et al. 1993). Petrie (1992) hypothesized that a female should copulate frequently with her mate so as to reduce her mate’s involvement in extrapair copulations. By reducing her mate’s involvement in extrapair copulations, a female may: (1) avoid the transmission of parasites and sexually transmitted diseases (Hamilton 1990); (2) may avoid sperm depletion by her mate; and (3) may monopolize her mate’s paternal …

On The Evolution Of Sexually Transmitted Diseases In Birds, Michael Lombardo

Michael P Lombardo

"The definitive version is available at www.blackwell-synergy.com".

Sexually transmitted diseases (STDs) in animals are caused by pathogens that are transmitted during copulation. Birds have played an important role in the development of STD-centered theories of mating behavior. However, it is not known whether STDs exist in wild bird populations. While the avian cloaca with its dual functions of gamete transfer and excretion seemingly predisposes birds for the evolution of STDs, the life history patterns of most birds (i.e., seasonal breeders with relatively brief annual periods of sexual activity) suggest otherwise. The importance of STDs as selective forces that shape host …

Left-Sided Directional Bias Of Cloacal Contacts During Tree Swallow Copulations, Aaron Petersen, Michael Lombardo, Harry Power

Michael P Lombardo

Most female birds have only a left ovary and associated oviduct with entry to the oviduct on the left side of the urodeum of the cloaca. We hypothesized that male cloacal contacts during copulation would occur from the left side of females because this would put sperm closer to the entrance of the oviduct. We observed that cloacal contacts from the left outnumbered those from the right by a margin of 3:1 during tree swallow, Tachycineta bicolor, copulations at nestboxes in western Michigan in 1999. The directional bias of cloacal contacts may have an adaptive function.

The Beneficial Sexually Transmitted Microbe Hypothesis Of Avian Copulation, Michael Lombardo, Patrick Thorpe, Harry Power

Michael P Lombardo

Several hypotheses have been proposed to explain why female birds either copulate repeatedly with a single mate or copulate with multiple partners even though only a single copulation may be sufficient to fertilize an entire clutch. We hypothesize that females may directly benefit from high frequencies of copulation and multiple copulation partners if they receive a cloacal inoculation of beneficial sexually transmitted microbes (STMs) that can either protect them against future encounters with pathogens and/or serve as therapy against present infections. Experiments in domestic animal production, wildlife rehabilitation, and clinical medicine indicate that inoculations of beneficial microbes derived from the …

Letter To Faa Administrator Re: Usair 1549 Crash, Paul F. Eschenfelder, Russell P. Defusco Phd, Richard Sowden

Paul F. Eschenfelder

No abstract provided.

An Initial Map Of Chromosomal Segmental Copy Number Variations In The Chicken, Xiaofei Wang, Samuel N. Nahashon, Tromondae K. Feaster, Ann L. Bohannon-Stewart, Nathaniel Adefope

Agricultural and Environmental Sciences Faculty Research

Background

Chromosomal segmental copy number variation (CNV) has been recently recognized as a very important source of genetic variability. Some CNV loci involve genes or conserved regulatory elements. Compelling evidence indicates that CNVs impact genome functions. The chicken is a very important farm animal species which has also served as a model for biological and biomedical research for hundreds of years. A map of CNVs in chickens could facilitate the identification of chromosomal regions that segregate for important agricultural and disease phenotypes.

Results

Ninety six CNVs were identified in three lines of chickens (Cornish Rock broiler, Leghorn and Rhode Island …

Correction [June 2010]

Nebraska Bird Review

Correction: The name of the photographer of the Great Blue Heron nest on page 5 of the March 2010 issue of the Nebraska Bird Review was inadvertently omitted. The photo was taken by Edward Tickle.

Annual Meeting At Chadron

Nebraska Bird Review

Sixty-seven members and guests were in attendance at the 111th Annual Meeting of the Nebraska Ornithologists' Union held at Camp Norwesca on May 14–16, 2010. The Camp Norwesca campus, located just south of Chadron State Park, proved to be an excellent birding location, providing good views of Evening Grosbeaks and Red Crossbills. Evening Grosbeaks were also found at Chadron State Park and at Beaver Wall in Sheridan Co.

Field trips were led by Wayne Mollhoff, Kathy DeLara, Ann Duey, Alice Kenitz, and Bruce and Donna Walgren. Rain on Saturday morning caused some last-minute changes to the trip itineraries. Among the …

Nebraska Bird Review (June 2010) 78(2), Whole Issue

Nebraska Bird Review

Correction ... 38

Spring Field Report, March 2010 to May 2010 ... 38

Annual Meeting at Chadron ... 63

An Unfortunate Name—With a Nebraska Twist ... 68

English and Scientific Alpha Codes for the Birds of Nebraska ... 70

Subscription and Organization Information ... 83

Spring Field Report, March 2010 To May 2010, W. Ross Silcock

Nebraska Bird Review

There was much of interest this spring. Early and late dates, early breeding, even a few rarities, are scattered through the species accounts. A few highlights are mentioned here. Mark Brogie found 6 species of Gallinaceous birds in one hour in Knox Co—quite a feat. Glossy Ibis reports continue to increase, and Mississippi Kites were found in new areas. Cranes made news: a leucistic Sandhill, another Common, and good numbers of Whoopings. Piping Plovers may be spreading out a bit, given the disappearance of the expanses of sand at L McConaughy, and amazing finds are being made by the team …

Subscription And Organization Information [June 2010]

Nebraska Bird Review

The Nebraska Bird Review is published quarterly by the Nebraska Ornithologists' Union, Inc., as its official journal, and is sent to members not in arrears of dues. Annual subscription rates (on a calendar-year basis only): $15 in the United States, $18 in Canada, and $30 in all other countries, payable in advance. Single copies are $4 each, postpaid, in the United States, $5 in Canada, and $8 elsewhere. Send orders for back issues to Anita Breckbill, NOU Librarian, c/o Music Library, WMB 30, University of Nebraska, Lincoln, NE 68588-0101.

Memberships in the NOU (on a calendar-year basis only): Active Household …

English And Scientific Alpha Code For The Birds Of Nebraska, Mark A. Brogie

Nebraska Bird Review

Alpha codes, abbreviations of common or scientific bird names, have long been used by ornithologists. The U.S. Bird Banding Laboratory's employment of alpha codes has become an integral part of large ornithological programs across the United States and Canada. Rather than using the full English or scientific name of a bird species, alpha codes allow quicker data entry and can also help to cross-reference other data.

The content of this article is a list of alpha codes, current through the American Ornithologists' Union Checklist of North American Birds, Seventh Edition (1998), its following supplements (AOU: 2000, 2002, 2003, 2004, 2005, …

An Unfortunate Name—With A Nebraska Twist, Rick Wright

Nebraska Bird Review

The past days have seen an amusing conversation about bird names conducted on the online discussion group NEBirds—just the sort of thing to get us through these dog-day afternoons of August. The scientific name of the Paltry Tyrannulet, a tropical flycatcher, is Zimmerius vilissimus, the genus so named by Melvin Traylor after American ornithologist John Todd Zimmer, who had a Nebraska connection through the university and State Museum in Lincoln. Combining the bird’s specific epithet from 1859—long preceding the new genus name of 1977—resulted in an English meaning of the entirety as “the very contemptible Zimmer.” Not what Traylor …

The Effect Of Heavy Metal Stress On Avian Proximal Tubule Urate Secretion, Carla L. Maffeo

Honors Scholar Theses

In both humans and birds, urate is an important antioxidant when maintained at normal plasma concentrations. Though human kidneys primarily reabsorb filtered urate, while those of birds perform mostly secretion, both maintain urate levels at ~300microM. The importance of maintaining urate levels within the homeostatic range was observed when the study of several prominent diseases revealed an association with hyperuricemia.

This study examined the effect of elevated zinc concentration on avian urate secretion. Here, acute exposure of chicken proximal tubule epithelial cells (cPTCs) to zinc stress had no effect on urate secretion, but prolonged zinc-induced cellular stress inhibited active transepithelial …

A Comparison Of The Singing Activity Of Carolina Wrens (Thryothorus Ludovicianus)) In Urban And Rural Settings, Shannon R. Trimboli

Masters Theses & Specialist Projects

As the earth’s landscape becomes increasingly urbanized, local wildlife must adapt to urban conditions or migrate to areas that are more rural. Urban wildlife face challenges such as direct loss of habitat, competition with non-native species, disturbance due to anthropogenic noise, and micro-climatic changes. Factors such as temperature, relative humidity, and noise affect the acoustical environment and may affect the ability of many animals, including birds, to communicate.

Understanding how urbanization affects birds’ singing behavior is critical because singing often plays a vital role in attracting mates and defending territories. In addition, as global climate change occurs it will become …

Winter Field Report, December 2009 To February 2010, W. Ross Silcock

Nebraska Bird Review

This was a long, cold winter, but effects on birds were not particularly noticeable. Perhaps the relative blandness of the reports reflected the "normal" behavior of most birds when confronted with a cold winter and the seriousness of survival: birds were in places they should have been. Carolina Wrens may have been hit (more on that in the Spring Report), but a few species were present in higher numbers than might have been expected. Rusty and Red-winged Blackbirds and Brown-headed Cowbird were notable for higher winter numbers, as were Snow Buntings. Even more so, there were lots of Fox Sparrows, …