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Articles 1 - 17 of 17
Full-Text Articles in Life Sciences
Comments On Eusopondis And Proctoporus (Squamata: Gymnophthalmidae) From Peru, With The Description Of Three New Species And A Key To The Peruvian Species, Edgar Lehr, Gunther Kohler
Comments On Eusopondis And Proctoporus (Squamata: Gymnophthalmidae) From Peru, With The Description Of Three New Species And A Key To The Peruvian Species, Edgar Lehr, Gunther Kohler
Edgar Lehr
We describe two new species of Proctoporus and a new species of Euspondylus (all from central Peru, Departamento de Huanuco, 2545 to 3010 m elevation). The new species are distinguished from all species presently assigned to Proctoporus and Euspondylus by unique characteristics of pholidosis, morphometrics, and color pattern. A key to the Peruvian species of Proctoporus and Euspondylus is provided. The current allocation of species to Proctoporus and Euspondylus may not reflect the phylogenetic relationships of the species under consideration. Based on the available data there appears to be no evidence to justify the separation of these genera. However, because …
Two New Species Of Marsupial Frogs (Anura: Hylidae: Gastrotheca) From The Cordillera Oriental In Central Peru, Edgar Lehr, William E. Duellman, Daniel Rodriguez, Rudolf Von May
Two New Species Of Marsupial Frogs (Anura: Hylidae: Gastrotheca) From The Cordillera Oriental In Central Peru, Edgar Lehr, William E. Duellman, Daniel Rodriguez, Rudolf Von May
Edgar Lehr
A distinctive new species of Gastrotheca from the Rio Chanchamayo Valley in the Cordillera Oriental in Peru is the only known member of the genus that lacks a tympanum. Another new species from the Cordillera de Carpish is distinctive in having a pair of lateral brood pouches and only basal webbing on the foot.
A Striking New Species Of The Eleutherodactylus From Andean Peru (Anura: Leptodactylidae), Edgar Lehr, Cesar Aguilar, William Duellman
A Striking New Species Of The Eleutherodactylus From Andean Peru (Anura: Leptodactylidae), Edgar Lehr, Cesar Aguilar, William Duellman
Edgar Lehr
No abstract provided.
Speciation In The Central American Seaway: The Importance Of Taxon Sampling In The Identification Of Trans-Isthmian Geminate Pairs, Matthew T. Craig, Philip A. Hastings, Daniel J. Pondella Ii
Speciation In The Central American Seaway: The Importance Of Taxon Sampling In The Identification Of Trans-Isthmian Geminate Pairs, Matthew T. Craig, Philip A. Hastings, Daniel J. Pondella Ii
Daniel Pondella
Aim To create a molecular phylogenetic hypothesis for the closely related serranid genera Alphestes Bloch and Schneider and Dermatolepis Gill and assess the role of the Panamanian Isthmus in speciation within these reef fishes. Location Tropical eastern Pacific, Caribbean, and Indian Oceans. Methods Sequence data from one nuclear (TMO-4C4) and three mitochondrial genes (16S, 12S, and cytochrome b) were used in maximum parsimony and maximum likelihood analyses. Results Here we show that previously hypothesized trans-isthmian geminate species are not each other's closest living relatives. Species of Alphestes Bloch and Schneider in the eastern Pacific are sister taxa indicating post-closure speciation. …
Food Based Approaches For A Healthy Nutrition In Africa, Mamoudou Hama Dicko
Food Based Approaches For A Healthy Nutrition In Africa, Mamoudou Hama Dicko
Pr. Mamoudou H. DICKO, PhD
The latest estimates of the FAO demonstrate the problems of the fight against hunger. These problems are manifested by the ever-increasing number of chronically undernourished people worldwide. Their numbers during the 1999-2001 period were estimated at about 840 million of which 798 million live in developing countries. Sub-Saharan Africa alone represented 198 million of those. In this part of Africa the prevalence of undernourishment ranges from 5-34%, causing growth retardation and insufficient weight gain among one third of the children under five years of age and resulting in a mortality of 5-15% among these children. Malnutrition resulting from undernourishment is …
New Species Of Drymoluber (Reptilia: Squamata: Colubridae) From Southeastern Peru, Edgar Lehr, Nelly Carrillo, Peter Hocking
New Species Of Drymoluber (Reptilia: Squamata: Colubridae) From Southeastern Peru, Edgar Lehr, Nelly Carrillo, Peter Hocking
Edgar Lehr
A new species of colubrid snake, genus Drymoluber, is described from three localities (1920-3300 m elevation) in southeastern Peru (Departamento de Apurimac), The characteristics of the new species include dorsal scales smooth with two apical pits, in 13 rows throughout body; 14-16 maxillary teeth; one preocular; two postoculars; One anterior and two posterior temporals; anal plate entire; ventrals 158-182; subcaudals 82-92; and a dorsal pattern of transverse blackish blotches (1,0-1,5 scales wide) and narrower hazelnut brown interspaces (2.0-2.5 scales wide) in juveniles, whereas adults are dorsally uniform olive-grey and ventrally yeUowish-grey. The new species differs from all species of the …
A Major Evolutionary Transition To More Than Two Sexes?, Joel D. Parker
A Major Evolutionary Transition To More Than Two Sexes?, Joel D. Parker
Joel D Parker
Two recently discovered cases of genetic caste determination in social insects might provide the first example of a major evolutionary transition from two to more than two sexes. I argue here that the system can be interpreted as comprising primarily individuals requiring gametes from three parental types and having four sexes from the perspective of demographic extinction. Additionally, I show how this mating system can be seen as a major evolutionary transition. For these populations, it is apparent that the mechanism for a three- or four-sex system does not lie within the myriad of possible arrangements of chromosomes within individuals, …
Molecular Phylogenetic Evidence For An Extracellular Cu Zn Superoxide Dismutase Gene In Insects, Joel D. Parker
Molecular Phylogenetic Evidence For An Extracellular Cu Zn Superoxide Dismutase Gene In Insects, Joel D. Parker
Joel D Parker
Representatives of three ancient gene families of the antioxidant enzyme superoxide dismutase (SOD) can be found in most metazoans. In mammals and Caenorhabditis elegans , there is at least one gene each of the cytoplasmic, mitochondrial and extracellular lineages of SOD genes. The cytoplasmic SOD was one of the first enzymes to be implicated in ageing due to its protection against damaging oxygen free radicals. In contrast to other metazoans, insects were thought to lack a gene for the extracellular SOD. We have cloned and sequenced an SOD mRNA in the ant Lasius niger that appears to belong to this …
Low Cost Seismic Test Platform, David A. Bainbridge
Low Cost Seismic Test Platform, David A. Bainbridge
David A Bainbridge
The challenge of seismic safety is better testing of building systems rather than just components. This mobile test platform may offer an inexpensive method of testing building performance.
Dramatic Decline Of Wild South China Tigers Panthera Tigris Amoyensis: Field Survey Of Priority Tiger Reserves, Ronald Tilson, Hu Defu, Jeff Muntifering, Philip J. Nyhus
Dramatic Decline Of Wild South China Tigers Panthera Tigris Amoyensis: Field Survey Of Priority Tiger Reserves, Ronald Tilson, Hu Defu, Jeff Muntifering, Philip J. Nyhus
Philip J. Nyhus
This paper describes results of a Sino- American field survey seeking evidence of South China tigers Panthera tigris amoyensis in the wild. In 2001 and 2002 field surveys were conducted in eight reserves in five provinces identified by government authorities as habitat most likely to contain tigers. The surveys evaluated and documented evidence for the presence of tigers, tiger prey and habitat disturbance. Approximately 290 km of mountain trails were evaluated. Infrared remote cameras set up in two reserves captured 400 trap days of data. Thirty formal and numerous informal interviews were conducted with villagers to document wildlife knowledge, livestock …
'Willa Cather’S ‘River Of Silver Sound’: Woman As Ecosystem In The Song Of The Lark, Matthew Sivils
'Willa Cather’S ‘River Of Silver Sound’: Woman As Ecosystem In The Song Of The Lark, Matthew Sivils
Matthew Sivils
Willa Cather loved the Southwest. The landscapes and cu ltural history of the area held a prominent place in both her fiction and in her own creative consciousness.1 As Judith Fryer points out, after Cather visited New Mexico and Arizona in 1912, she became so enamored with the region that she returned many times over the fol lowing decade (41). During this period Cather published a novel heavily inspired by her affection for the Southwestern landscape-The Song of the Lark. This novel fol lows Thea Kronborg from her childhood in the fictional rural town of Moonstone, Colorado, through an artistic …
A New Species Of Phyllonastes From Peru (Amphibia, Anura, Leptodactylidae), Edgar Lehr, Cesar Aguilar, Mikael Lundberg
A New Species Of Phyllonastes From Peru (Amphibia, Anura, Leptodactylidae), Edgar Lehr, Cesar Aguilar, Mikael Lundberg
Edgar Lehr
A new Andean species of Phyllonastes is described from east-central Peru (Departamento de Pasco, 2900 m elevation), The new species differs from all known Phyllonastes by lacking discs with circumferential groove on the toes, inguinal spots, and dorsolateral shipes. The new species shares characters with members of the genus Phrynopus, which suggests possible relationships between the genera.
Rediscovery Of Hyla Melanopleura Boulenger, 1912 (Amphibia: Anura: Hylidae), Edgar Lehr, Rudolf Von May
Rediscovery Of Hyla Melanopleura Boulenger, 1912 (Amphibia: Anura: Hylidae), Edgar Lehr, Rudolf Von May
Edgar Lehr
The description of Hyla melaflopleura was based on five syntypes from Huancabamba. Peru, from 925 m above sea level. Information on colouration in life and life history were unknown until the authors rediscovered this species in Huancabamba, Pe ru, a t 1780 m above sea level. Eight frogs were found at night in the vegetation next to small streams and in artificial ponds. Life colouration of H . melaflopleura at day and night and osteology of the hand are described , and measurements of morphological characters are presented. The call and tadpole of H. meiaflopleura remain unknown.
Darwinism, Design And Complex Systems Dynamics, David Depew, Bruce Weber
Darwinism, Design And Complex Systems Dynamics, David Depew, Bruce Weber
David J Depew
No abstract provided.
Ethics In A Time Of Crises, David A. Bainbridge
Ethics In A Time Of Crises, David A. Bainbridge
David A Bainbridge
Global crises reveal the weakness of our current ethical construct. A more inclusive ethical framework is needed to encourage and support sustainable development and management of resources and restoration of damaged ecosystems.
Concepts Of Bacterial Biodiversity For The Age Of Genomics, Frederick M. Cohan
Concepts Of Bacterial Biodiversity For The Age Of Genomics, Frederick M. Cohan
Frederick M. Cohan
No abstract provided.
Anatomy, Physiology And Psychology Of Desert Destruction, David A. Bainbridge
Anatomy, Physiology And Psychology Of Desert Destruction, David A. Bainbridge
David A Bainbridge
Off road vehicle damage continues to expand in the California deserts. This 2004 presentation explores the causes and possible methods for reducing destruction. Protecting and restoring the desert is not a technical problem but an economic/accounting problem.