A Specimen Record of the Barnacle Goose in Texas

1987 ◽  
Vol 32 (4) ◽  
pp. 506
Author(s):  
Eric G. Bolen
Keyword(s):  
Barnacle Goose ◽  
Specimen Record

Development of metabolic enzyme activity in locomotor and cardiac muscles of the migratory barnacle goose

1995 ◽  
Vol 269 (1) ◽  
pp. R64-R72 ◽  
Author(s):  
C. M. Bishop ◽  
P. J. Butler ◽  
S. Egginton ◽  
A. J. el Haj ◽  
G. W. Gabrielsen
Keyword(s):  
Plasma Glucose ◽  
Citrate Synthase ◽  
Specific Activity ◽  
Glycolytic Enzymes ◽  
Metabolic Enzyme ◽  
Mitochondrial Enzymes ◽  
Pectoralis Muscle ◽  
Barnacle Goose ◽  
Average Maximum ◽  
Cardiac Muscles

Preflight development of the goslings was typified by rapid increases in the mitochondrial enzymes of the semimembranosus and heart ventricular muscles resulting in near-adult values by 3 wk of age. In contrast, aerobic capacity of the pectoralis muscle initially developed slowly but showed a rapid increase between 5 and 7 wk of age, in preparation for becoming airborne. Activities of glycolytic enzymes in the pectoralis muscle showed similar patterns of development as those found for the aerobic enzymes, except for hexokinase, which was low at all ages, indicating an adaptation for catabolism of both intracellular glycogen and plasma fatty acids in preference to plasma glucose. Muscle mass specific activity of citrate synthase in the pectoralis increased by only 33% from goslings during the first few days of flight, compared with premigratory geese. Activities of anaerobic glycolytic enzymes in the ventricles were low, but values for hexokinase, which is involved in the phosphorylation of plasma glucose, developed rapidly. Values for lactate dehydrogenase were also high, reflecting the capacity of the heart to catabolize plasma lactate. Substrate flux supplied by carnitine palmitoyltransferase and oxoglutarate dehydrogenase (OGD), in the pectoralis muscles of the premigratory geese, appears to have the smallest excess capacities to meet the requirements of sustained aerobic flight. The average maximum oxygen uptake for premigratory geese during flight, as indicated by values for OGD, is calculated to be 484 ml O2/min (or 208 ml O2.min-1.kg-1).

Incomplete species lists derived from global and regional specimen-record databases affect macroecological analyses: A case study on the vascular plants of China

2018 ◽  
Vol 45 (12) ◽  
pp. 2718-2729 ◽  
Author(s):  
Hong Qian ◽  
Tao Deng ◽  
Jan Beck ◽  
Hang Sun ◽  
Cui Xiao ◽  
...  
Keyword(s):  
Vascular Plants ◽  
Species Lists ◽  
Specimen Record

scholarly journals Dragonflies and damselflies of the Western Cape - OdonataMAP report, August 2018

2018 ◽  
Vol 9 ◽  
Author(s):  
Les Underhill ◽  
Megan Loftie-Eaton ◽  
Rene Navarro
Keyword(s):  
20Th Century ◽  
Western Cape ◽  
Specimen Record

In the two-year period 1 July 2016 to 30 June 2018, citizen scientists added seven species to the list of dragonflies and damselflies in the Western Cape, bringing the total to 76 species (Figure 1). The database available for this report contained 11,267 records of dragonflies and damselflies. This includes the specimen record dating back to the start of the 20th century. Of these records 2,433 records (22%) were added between July 2016 and June 2017, and 4,202 (37%) between July 2017 and June 2018. Thus 59% of the entire Western Cape database of records of dragonflies and damselflies was contributed by citizen scientists in two years.

scholarly journals A study of the progression of damage in an axially loaded Branta leucopsis femur using X-ray computed tomography and digital image correlation

PeerJ ◽  
2017 ◽  
Vol 5 ◽  
pp. e3416 ◽  
Author(s):  
Zartasha Mustansar ◽  
Samuel A. McDonald ◽  
William Irvin Sellers ◽  
Phillip Lars Manning ◽  
Tristan Lowe ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Digital Image Correlation ◽  
Digital Image ◽  
Time Lapse ◽  
Image Correlation ◽  
Long Bone ◽  
Barnacle Goose ◽  
3D Images ◽  
X Ray ◽  
X Ray Computed

This paper uses X-ray computed tomography to track the mechanical response of a vertebrate (Barnacle goose) long bone subjected to an axial compressive load, which is increased gradually until failure. A loading rig was mounted in an X-ray computed tomography system so that a time-lapse sequence of three-dimensional (3D) images of the bone’s internal (cancellous or trabecular) structure could be recorded during loading. Five distinct types of deformation mechanism were observed in the cancellous part of the bone. These were (i) cracking, (ii) thinning (iii) tearing of cell walls and struts, (iv) notch formation, (v) necking and (vi) buckling. The results highlight that bone experiences brittle (notch formation and cracking), ductile (thinning, tearing and necking) and elastic (buckling) modes of deformation. Progressive deformation, leading to cracking was studied in detail using digital image correlation. The resulting strain maps were consistent with mechanisms occurring at a finer-length scale. This paper is the first to capture time-lapse 3D images of a whole long bone subject to loading until failure. The results serve as a unique reference for researchers interested in how bone responds to loading. For those using computer modelling, the study not only provides qualitative information for verification and validation of their simulations but also highlights that constitutive models for bone need to take into account a number of different deformation mechanisms.

A QUANTITATIVE ANALYSIS OF INDIVIDUALITY IN BARNACLE GOOSE LOUD CALLS

Bioacoustics ◽  
1994 ◽  
Vol 5 (4) ◽  
pp. 247-260 ◽  
Author(s):  
M. HAUSBERGER ◽  
J. P. RICHARD ◽  
J. M. BLACK ◽  
R. QURIS
Keyword(s):  
Quantitative Analysis ◽  
Barnacle Goose ◽  
Loud Calls

Das Bürzeldrüsensekret der Trauerente (Melanitta nigra) / The Uropygial Gland Wax from the Common Scoter (Melanitta nigra)

1972 ◽  
Vol 27 (6) ◽  
pp. 695-698 ◽  
Author(s):  
J. Jacob ◽  
A. Zeman
Keyword(s):  
Chain Length ◽  
Nonanoic Acid ◽  
Uropygial Gland ◽  
Primary Alcohols ◽  
Barnacle Goose ◽  
The Common ◽  
Acidic Components

The uropygial gland fat from the common scoter (Melanitta nigra) is a mixture of ester waxes of which 2,4,6-trimethyl-octanoic and 2,4,6-trimethyl-nonanoic acid are shown to be the main compounds within the acidic components. Besides traces of 2,4-dimethyl-heptanoic and 4,6-dimethyloctanoic acid could be detected. The alcoholic components of the waxes are more complex and consist of n-alkanols (77,6%) with chain-length from C14— C18 and of monomethyl-substituted primary alcohols with the same chain-length and branches in 2-, 4-, 8-, 12- and 14-position.Chemotaxonomically the common scoter differs from other birds of this tribe but has some relationship to the barnacle goose and to the red-breasted merganser.

scholarly journals The First Specimen Record of Gray Heron (Ardea cinerea) for North America

2007 ◽  
Vol 119 (1) ◽  
pp. 134-136 ◽  
Author(s):  
Martin Renner ◽  
Paul D. Linegar
Keyword(s):  
North America ◽  
Ardea Cinerea ◽  
Specimen Record
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