scholarly journals The Abyssinian Art of Louis Agassiz Fuertes in the Field Museum

2020 ◽  
Author(s):  
Paul Johnsgard
Keyword(s):  
Reproductive Biology ◽  
Conservation Status ◽  
Field Museum ◽  
Modern Bird ◽  
Limited Edition ◽  
Pencil Drawings ◽  
Louis Agassiz ◽  
Species Ecology

This book documents the paintings and drawings executed by Louis Agassiz Fuertes during the Field Museum of Natural History’s seven-month expedition to Ethiopia (Abyssinia) in 1926–27. During that time Fuertes completed 70 field watercolors that illustrate 55 species of birds and four species of mammals. He also executed 34 pencil drawings, which illustrate 13 species of mammals and 11 species of birds, plus numerous miscellaneous sketches and small watercolors. This book identifies and describes the biology of all 69 species of birds and mammals illustrated by Fuertes and includes 32 color reproductions of Fuertes’s watercolors that were published as a limited-edition album in 1930 by the Field Museum. The 60,000-word text provides brief summaries of all these species’ ecology, behavior, and reproductive biology as well as information about their current populations and conservation status. A review of Fuertes’s life, his influence on modern bird and wildlife art, and his participation in and artistic contributions to the Field Museum’s Abyssinian Expedition is also included, as well as more than 250 bibliographic citations.

Phylogeography of the rare Australian endemic Grey Falcon Falco hypoleucos: implications for conservation

2020 ◽  
Vol 30 (3) ◽  
pp. 447-455 ◽  
Author(s):  
DALE W. MULLIN ◽  
GRAHAM A. MCCULLOCH ◽  
JONNY SCHOENJAHN ◽  
GIMME H. WALTER
Keyword(s):  
Genetic Diversity ◽  
Arid Zone ◽  
Local Level ◽  
Conservation Status ◽  
Genetic Structuring ◽  
Single Population ◽  
Breeding Sites ◽  
Effective Conservation ◽  
Generation Sequencing ◽  
Species Ecology

SummaryThe Grey Falcon Falco hypoleucos is one of the world’s rarest raptors, with an estimated population size of fewer than 1,000 individuals. Our knowledge of threats posed to the Grey Falcon remains scant. Understanding the genetic variation in this species would help to assess its conservation status more realistically and its prospects for survival in a changing environment. We amplified the cytochrome b region of mitochondrial DNA from the feathers of 26 individuals captured from the wild across the distribution of the species and assessed the genetic diversity and spatial genetic structuring of the species. Genetic diversity was low, with only six haplotypes identified, but there was no evidence of a recent genetic bottleneck. No population genetic structuring was detected, indicating that the Grey Falcon population is effectively continuous across the species’ entire distribution, covering much of Australia’s arid/semi-arid zone. Our results indicate that the Grey Falcon should be managed as a single population and suggest conservation efforts that benefit the species at a local level should be good for the species as a whole. Future studies should employ next generation sequencing approaches, which may provide finer-scale information on the extent these birds move among breeding sites. Further research into the species’ ecology is also required to identify effective conservation measures.

scholarly journals Ecological requirements and relative impact of threats affecting the Austral RailRallus antarcticus: monitoring methodology considerations for an imperative conservation status re-evaluation

2019 ◽  
Vol 29 (4) ◽  
pp. 586-597
Author(s):  
ANDRÉS DE MIGUEL ◽  
LAURA FASOLA ◽  
IGNACIO ROESLER ◽  
LUCÍA MARTIN ◽  
NATALIA COSSA ◽  
...  
Keyword(s):  
Global Climate ◽  
American Mink ◽  
Conservation Status ◽  
Santa Cruz ◽  
Management Decisions ◽  
Habitat Features ◽  
Ecological Requirements ◽  
The Poor ◽  
Cattle Management ◽  
Species Ecology

SummarySince its rediscovery in 1998, two major threats have been mentioned for the enigmatic Austral RailRallus antarcticus: cattle management by burning grass and rushes and predation by American minkNeovison vison. Added to the lack of a protocol to monitor this secretive bird, ever-growing threats make it necessary to study its global situation in depth to take accurate and urgent management decisions. We firstly studied how threats to the Austral Rail currently impact their occupancy and relative density (RD) at a wetland scale and habitat features associated with its presence at survey site scale inside wetlands in Santa Cruz province, Argentina. We additionally developed a monitoring protocol to detect the rail effectively and promptly by studying responses to playback with two different vocalisations at different times of the day and season. Both threats evaluated were negatively related to occupancy and RD of the Austral Rail, especially mink presence appearing to have an additive effect. We propose American mink control as crucial for Austral Rail conservation, while it would also be necessary to conserve a portion of wetlands exempt from burning and cattle presence. At survey sites, its presence was positively related with c.1–1.5 m tall rushes, whilst rails avoided low- density rush areas that resulted after management of rushes with fire to create pasture. To detect rails, both vocalisations can be confidently used at any time of the day and season. The poor knowledge about species ecology, mismanagement of vegetation in wetlands, expansion of American mink in Patagonia, construction on two dams in the Santa Cruz river basin, added to the already modified humidity conditions due to global climate change, force us to suggest that the Austral Rail should be considered as globally ‘Endangered’ (EN), to ensure the consideration of the species in management decisions.

Fine structure and possible functions of the hermaphrodite duct of some pulmonate snails (Mollusca: Gastropoda)

1990 ◽  
Vol 48 (3) ◽  
pp. 68-69
Author(s):  
Alan N. Hodgson
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Fine Structure ◽  
Seminal Vesicle ◽  
Reproductive Biology ◽  
Light Microscope ◽  
Light Microscope Level ◽  
Transmission Electron ◽  
Standard Techniques

The hermaphrodite duct of pulmonate snails connects the ovotestis to the fertilization pouch. The duct is typically divided into three zones; aproximal duct which leaves the ovotestis, the middle duct (seminal vesicle) and the distal ovotestis duct. The seminal vesicle forms the major portion of the duct and is thought to store sperm prior to copulation. In addition the duct may also play a role in sperm maturation and degredation. Although the structure of the seminal vesicle has been described for a number of snails at the light microscope level there appear to be only two descriptions of the ultrastructure of this tissue. Clearly if the role of the hermaphrodite duct in the reproductive biology of pulmonatesis to be understood, knowledge of its fine structure is required.Hermaphrodite ducts, both containing and lacking sperm, of species of the terrestrial pulmonate genera Sphincterochila, Levantina, and Helix and the marine pulmonate genus Siphonaria were prepared for transmission electron microscopy by standard techniques.

Schizophrenia Memorabilia in a Limited Edition

1973 ◽  
Vol 18 (7) ◽  
pp. 329-330
Author(s):  
HANS DOERR
Keyword(s):  
Limited Edition
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