Animal Sciences Commons^™

Pfiesteria Piscicida And Dinoflagellates Similar To Pfiesteria, Harold G. Marshall

Virginia Journal of Science

Pfiesteria pisiccida is a microscopic, unicellular organism that is classified as both a mixotrophic and heterotrophic dinoflagellate, which has been associated with both fish deaths and a cause of human illness (Burkholder et al., 1992; Glasgow et al., 1995; Burkholder and Glasgow, 1997). This species possesses a complex life cycle that includes motile forms (e.g. zoospores, gametes, amoebae) and a cyst stage that may remain dormant in the sediment (Burkholder et al., 1995b). Pfiesteria piscicida is known to have toxin and non-toxin producing populations, where cyst transformation into the toxic motile zoospores may be initiated by the presence of certain …

Evolutionary Patterns Of Morphometrics, Allozymes And Mitochondrial Dna In Thrashers (Genus Toxostoma), Robert M. Zink, Donna L. Dittmann, John Klicka, Rachelle C. Blackwell-Rago

Ornithology Program (HRC)

We examined patterns of variation in skeletal morphometrics (29 characters), allozymes (34 loci), mitochondrial DNA (mtDNA) restriction sites (n = 74) and fragments (n = 395), and mtDNA sequences (1,739 bp from cytochrome b, ND2, ND6, and the control region) among all species of Toxostoma. The phenetic pattern of variation in skeletal morphometrics generally matched traditional taxonomic groupings (based on plumage patterns) with the exceptions of T. redivivum, which because of its large size clusters outside of its proper evolutionary group (lecontei), and T. occelatum, which did not cluster with T. curvirostre. Skull characters contributed highly to species discrimination, suggesting …

Health Transfers: An Application Of Health-Health Analysis To Assess Food Safety Regulations, Fred Kuchler, Jackqueline L. Teague, Richard A. Williams, Don W. Anderson

RISK: Health, Safety & Environment (1990-2002)

The authors apply a Health-Health Analysis to risks associated with harvesting Gulf oysters to evaluate that approach to managing health and safety risks.

The Ultraviolet Birds Of Nebraska, Paul A. Johnsgard

Papers in Ornithology

Our human eyesight does not allow us to perceive the world as most birds do, and that they at times might be responding to visual clues literally beyond our ken. For example, are the ultraviolet "tear-drops" on the cheeks of a Mourning Dove an important visual "target" for close-up courtship, or are they perhaps important for stimulating preening by its mate? It would be interesting to modify or eliminate these small marks, and see what behavioral effects might result. Two individual male birds that, to human eyes, might appear identical, may be of quite differing attraction to females, depending upon …

Fish & Wildlife News: September/October 1999

Fish and Wildlife News

Contents:
Babbitt Lauds Voluntary Conservation 2
Another Bird Wings Off “The List” 3
New Division Focuses on Reaching Out 3
Group Studies Towering Concerns 4
Fight Back Against Hackers 5
Gore Salutes a Restored River 9
Feathered Friends Harbinger Hardy Hurricanes 9
A Family Reunion at a Remote Refuge 18
Coming to Your TV: Conservation History 19
Kids Catch Fish and Fun 21
Fire and Grit at NCTC 22
Fish & Wildlife…In Brief 31

1998 Nebraska Nesting Report, Wayne J. Mollhoff

Nebraska Bird Review

Following a hiatus of nearly a decade, this report on the nesting birds of Nebraska reinstates a Nebraska Bird Review tradition that began with an anonymous compilation (apparently by the editor) of the notes from two observers in the 1955 breeding season (Anonymous 1956). By 1965, with the inception of the Cornell Nest Record Card Program, data was collected on standardized cards, with the completed cards being forwarded to Cornell University in New York.

I accepted responsibility for the program several years ago; but by mutual agreement with the/Nebraska Ornithologists' Union leadership, I have delayed work until the Nebraska Breeding …

Three Poems, Roy Scheele

Nebraska Bird Review

At the Kitchen Window

Prodigal

The Patience of the Hawk

Nebraska Bird Review (September 1999) 67(3), Whole Issue

Nebraska Bird Review

Summer Field Report, June to July, 1999 ... 86

Species Accounts ... 88

The Ultraviolet Birds of Nebraska ... 103

Cooperative Whooping Crane Tracking Project (March 1999–May 1999) ... 105

1998 Nebraska Nesting Report ... 108

Three Poems by Roy Scheele ... 114

Table Of Contents And Masthead, From Nebraska Bird Review (September 1999) 67(3)

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): $14.00 in the United States; $18.00 for all foreign countries, payable in advance. Single copies are $4.00 each, postpaid, in the United States, and $5.00 elsewhere. Send orders for back issues to Mary Prichard, NOU Librarian, University of Nebraska State Museum, Lincoln, NE 68588-0514.

Memberships in NOU (on a calendar year basis only): Active, $15.00; Sustaining, $25.00; Student, $10.00; Family Active, $20.00; Family Sustaining, $30.00; …

Cooperative Whooping Crane Tracking Project March 1999-May 1999

Nebraska Bird Review

A peak population of 182 (164 adult/subadult and 18 juvenile) whooping cranes was reported at Aransas during the winter of 1998-99. An adult plumaged whooping crane, which wintered with sandhill cranes about 90 miles northeast of Aransas in Fort Bend County, was the record 183rd bird in the wintering flock. No birds are known to have been lost at Aransas during the winter. A 1986 colormarked female with a broken leg, last observed at Quivira NWR on December 29, 1998, was not reported during the spring migration, and is assumed to be dead. An estimated 183 whooping cranes migrated north …

Summer Field Report, June To July, 1999, W. Ross Silcock

Nebraska Bird Review

First of all, I want to thank Joel Jorgensen for helping write these reports for the last few years. Joel has decided to spend his limited free time on Records Committee matters; he is currently Chairman. Over the last few years, Joel has made significant contributions to Nebraska ornithology, particularly through his! meticulous counts of shorebirds in the Rainwater Basin.

This season proved interesting in terms of ranges of breeding birds, as discussed in the accounts. See, for example, Little Blue Heron, the dOWitchers. Black-billed Magpie, White-breasted Nuthatch, Sedge Wren, and the towhees. There seems to be an increasing number …

The Ultraviolet Birds Of Nebraska, Paul A. Johnsgard

Nebraska Bird Review

That the visual range of at least some birds extends into the ultraviolet region has been known since the early 1970s, when it was first discovered in hummingbirds and pigeons. The ultraviolet region is that energy consisting of light waves shorter than Violet, and thus beyond human perception. Although UV perception has long been recognized to occur in many insects and other invertebrate groups, scientists had doubted that either birds or mammals have this ability. Instead, it was generally assumed that the vertebrate cornea provides a protective block to ultraviolet waves, perhaps because UV energy can do damage to the …

Comparing The Tadpoles Of Hyla Geographica And Hyla Semilineata, Anne D'Heursel, Rafael O. De Sá

Biology Faculty Publications

External morphology, internal oral anatomy, and chondrocranial anatomy were examined for tadpoles of Hyla geographica from the Amazon rainforest, Brazil, and Hyla semilineata from the Atlantic rainforest, Brazil. Here, we provide morphological larval data to help diagnose these closely related species. Scanning electron microscopy analysis of buccal morphology showed the most distinctive features between these species: the distance between the lingual papillae in the buccal floor of H. geographica is three times greater than that distance in H. semilineata, and the relative size of the lingual papillae in H. geographica is less than half their size in H. semilineata. Although …

Kentucky Warbler (Vol. 75, No. 3), Kentucky Library Research Collections

The Kentucky Warbler

No abstract provided.

Fisheries Research Report No. 114 - The Western Australian Scallop Industry, D C. Harris, L M. Joll, R A. Watson

Fisheries Research Reports

Five separate commercial fisheries target the saucer scallop, Amusium balloti (Bernadi 1861) in Western Australian waters. While the average annual catch from these fisheries is around 600 tonnes of scallop meat, past catches have been highly variable with annual landings ranging from 150 to 4,400 tonnes of meat worth between $2 and $59 million. Consequently, scallops represent one of the larger single-species fisheries operating in Western Australia (WA).

A. balloti has a distribution spanning most of the WA coast, from Broome in the north around to Esperance in the south. Despite this extensive distribution, saucer scallops tend to be restricted …

Fisheries Research Report No. 115 - Statistical Analysis Of Gascoyne Region Recreational Fishing Study July 1996, Neil R. Sumner, Richard A. Steckis

Fisheries Research Reports

A survey of recreational fishers in the Gascoyne region of Western Australia was conducted in July 1996 to provide information required by fisheries managers. Catch rates, attitudinal, demographic and economic information from boat-based and shore-based fishers was collected by Fisheries Officers. Pink snapper (Pagrus auratus) was the primary species caught by boatbased recreational fishers in the region. Various species of whiting were the predominant catch from shore-based anglers. Most fishers interviewed (80%) supported the introduction of an upper limit on the amount of fish and fillets that a person could take away from the Gascoyne region for personal or family …

Avian Communities Of Large Reclaimed Mine Grasslands In Southwestern Indiana, Travis L. Devault

All-Inclusive List of Electronic Theses and Dissertations

Many bird species native to the tallgrnss prairie region oCthc central U.S. have declined drastically since European settlement due lo the destruction and alteration of grassland habitat. In this study, the breeding bird communities or 21 large reclaimed surface coal mine grasslands in a seven-county area or southwestern Indiana were examined with respect to species and guild composition, density, variation among sites, and grassland size. In addition, the vegetation characteristics of nine large mine grasslands were described and related to the presence and abundance or eight grasslund bird species common to the study areas. The immense size of mine grasslands …

Evidence Supporting The Recent Origin And Species Status Of The Timberline Sparrow, John Klicka, Robert M. Zink, Jon C. Barlow, W. Bruce Mcgillivray, Terry J. Doyle

Ornithology Program (HRC)

The Timberline Sparrow (Spizella taverneri), although originally described as a species, is currently classified as a subspecies of the more widespread Brewer's Sparrow (S. breweri). We investigated the taxonomic status and recent evolutionary history of these species by comparison of both morphological and molecular characters. Morphometric comparisons using 6 external and 18 skeletal measurements show that S. taverneri specimens from two widely separated populations (Yukon and southwestern Alberta, Canada) are indistinguishable with respect to size yet are significantly larger (by 3%) than representatives of several breweri populations. Analysis of 1,413 base pairs of mitochondrial DNA (mtDNA) for 10 breweri and …

Draft Shark Bay Pink Snapper Management Plan 1999, Fisheries Western Australia.

Fisheries Management Papers

This draft management plan was prepared by the Fisheries Department on 12 July 1999 for the Minister for Fisheries for the purpose of facilitating consultation in resepct of the proposal by the Minister to determine a new Management Plan for the Shark Bay Pink Snapper Fishery.

The Translocation Of Barramundi. A Discussion Paper., Makaira Pty Ltd

Fisheries Management Papers

There is recognisable economic benefit to the translocation of barramundi, but there is also a need to ensure the translocation will not adversely impact upon the genetic diversity, introduce disease or impact on the natural environment and biodiversity. This discussion paper has been prepared to provide information to assist in the assessment of the possible impact of translocation of barramundi into and within Western Australia, for the purposed of recreational stock enhancement, aquaculture development and domestic stocking. In contemplating the translocation any aquatic species, signigicant economic and social benefits must be balanced with biological and environmental risks; that is, the …

Fisheries Research Report No. 111 - Sea Temperature Variability Off Western Australia 1990 To 1994, Alan Pearce, Mark Rossbach, Marion Tait, Rhys Brown

Fisheries Research Reports

Analysis of temperature data from coastal waters between Shark Bay and Cape Mentelle has shown the main features of temporal and spatial variability in temperature along the Western Australian coastline. Three distinct periods of variability emerge: the annual cycle (peak temperatures generally in January-February and troughs in July-August), a few-day (weatherrelated) cycle, and the diurnal pattern.

Summer temperatures range from 24° C (South Passage) to 19° C (Cape Mentelle), and winter temperatures from 21° C (South Passage) to 16° C (Marmion). Mean annual temperature ranges (winter minimum to summer maximum) are between 3° C (South Passage) and 7° C (Alkimos), …

Fish & Wildlife News: July/August 1999

Fish and Wildlife News

Contents:

Bald Eagle Soaring to Recovery 2
New Directorate Appointments 3
Biologists Discover Lynx Kittens 7
Preview National Wildlife Refuge Week 9
Refuge Management Goes Under the Sea 13
Learning About Fisheries in Region 1 14
Student Career Program Fulfills a Promise 18
Service Reaches Out to Ranchers 21
FWS and Tribes: Partnership Success Story 21
Tracking the Elusive Sage Grouse 24
New Feature: Fish & Wildlife Honors... 30
Fish & Wildlife...In Brief 31

Predicting The Cutting Time Of Cottage Cheese Using Backscatter Measurements, Czarena L. Crofcheck, Frederick A. Payne, Sue E. Nokes

Biosystems and Agricultural Engineering Faculty Publications

An automated system for monitoring culture growth and determining coagulum cutting time is needed for cottage cheese manufacturing. A light backscatter measurement system was designed and installed in a local cottage cheese manufacturing plant. A cutting time prediction algorithm was developed using parameters generated from the backscatter profile. The cutting time prediction algorithm, T_cut = T_max + β₂ S, used two time-based parameters generated from the backscatter profile (T_max and S) and one operator selected parameter, β₂, to predict the coagulum cutting time, Tcut. The standard error of prediction for the algorithm was 6.4 …

State Of The Fisheries Report 1998/1999, Jim W. Penn

Status Reports of the Fisheries and Aquatic Resources

The State of the Fisheries document is designed as an essential supplement to the Annual Report to Parliament and provides a more detailed level of information to support the agency's non-financial performance measures. By summarising management changes, compliance activities and research data such as landings, effort, catch rates, stock assessment and breeding stock levels, this document provides a valuable reference point for Western Australian fisheries ofmajor importance to the commercial, recreational and aquaculture sectors. Information relevant to Fisheries WA's Fish and Fish Habitat Protection Program and activities undertaken on behalf ofthe Commonwealth is also provided. The report indicates that overall …

Estructura Del Condrocráneo Y Esqueleto Visceral De Larvas De Pseudis Minuta (Anura, Pseudidae, E. O. Lavilla, Rafael O. De Sá

Biology Faculty Publications

The chondrocranium and visceral skeleton of Pseudis minuta tadpoles are described, based on a series of five larvae in stages 31 - 35 of Gosner (1960). Among their striking characters are the presence of peculiar articular surfaces between cornua trabeculae and suprarostral cartilage, the incomplete development of the orbital cartilage, the high fenestration of the floor of the cavum cranii, the fusion of posterior foramina, and the fusion of spicules 3 and 4 in the hyobranchial skeleton.

Marvelous, Mystical, Tropical Trogons, Paul A. Johnsgard, John Schmitt , Illustrator

Papers in Ornithology

f all the groups of birds in the world, few fit our ideas of “tropical forest birds” as well as the trogons and quetzals. They are found almost entirely between the Tropics of Cancer and Capricorn, from northern Mexico to northern Argentina. Furthermore, nearly all of them depend on hollows in large trees for nest sites, except for a few species that excavate cavities in the paper-mache-like homes of tree-dwelling termites or arboreal wasp nests.Beyond that, trogons and quetzals conform to our ideas of how exotic tropical birds should appear. Nearly all of the approximately 40 species are colored iridescent …

Overcoming Response Bias Using Symbolic Representations Of Number By Chimpanzees (Pan Troglodytes), Sarah T. Boysen, Kimberly L. Mukobi, Gary G. Berntson

Sentience Collection

We previously reported that chimpanzees were unable to optimally select the smaller of two candy arrays in order to receive a larger reward. When Arabic numerals were substituted for the candy arrays, animals who had had prior training with numerical symbols showed an immediate and significant improvement in performance and were able to select reliably the smaller numeric representation in order to obtain a larger reward. Poor performance with candy arrays was interpreted as reflecting a response bias toward the intrinsic incentive and/or perceptual features of the larger array. In contrast, the Arabic numerals represent numerosity symbolically and appear to …

The Mayfly Newsletter, Peter M. Grant

The Mayfly Newsletter

The Mayfly Newsletter is the official newsletter of the Permanent Committee of the International Conferences on Ephemeroptera.

Clark's Nutcracker At Lake Mcconaughy, Stephen J. Dinsmore

Nebraska Bird Review

On 1 November 1998 I observed a Clark's Nutcracker along the north shore of Lake McConaughy in Keith County. Specifically, the bird was along the road of the Cedar Vue Recreation Area, just east of the main boat ramp. I studied and photographed the bird from 11:32 to 11:50 a.m. I was driving along the entrance road to Cedar Vue when I spotted a bird perched in a dead tree. As I approached the tree, I was thinking about stopping when the bird suddenly took flight. The flight silhouette resembled that of a flicker, although the undulating flight and slower …

Spring Field Report, March To May 1999, W. Ross Silcock, Joel G. Jorgensen

Nebraska Bird Review

This spring proved an exciting season for several reasons. For warbler fans, it described a dream with lots of birds to look at and a rather incredible species count (for anywhere) of no fewer than 381 Many "eastern" warblers were found westward, especially at "islands" of habitat such as the Geneva Cemetery and similar spots just beyond the western edge of the original eastern woodland region, as well as the Panhandle. For rarity counters, spring included no fewer than 4 first state records: Glossy Ibis, Gray Flycatcher, Black-throated Gray Warbler, and Brambling. We make here a special note that the …