Part III. The fauna of the Tristan da Cunha Islands

1965 ◽  
Vol 249 (759) ◽  
pp. 361-402 ◽  
Keyword(s):  
South America ◽  
Animal Species ◽  
Current Knowledge ◽  
Terrestrial Invertebrate ◽  
Invertebrate Species ◽  
Tristan Da Cunha ◽  
General Evaluation ◽  
Taxonomic Groups ◽  
Biogeographical Province ◽  
Tristan Da Cunha Islands

1. Introduction Tristan da Cunha, Inaccessible, Nightingale and Gough Islands are similar in climate, physiography and vegetation, and form a single biogeographical province. Many animal species, including some endemics, occur on all of them, and the faunas of the four islands have the same general characteristics and show a common relationship to stocks in temperate South America. Any discussion of the fauna of the group must therefore consider all four main islands. Such a general evaluation is rendered difficult by variations in the intensity of study of the different islands and of different taxonomic groups. It is probably true today that the native land fauna of the archipelago is adequately known in outline, and that no native vertebrate or abundant large terrestrial invertebrate species awaits discovery. However, the smallei and less conspicuous land invertebrates and the majority of the shallow-water marine organisms are undoubtedly underworked, and much remains to be discovered about the detailed distribution, ecology and interrelationships of the island faunas. The present paper is no more than an interim review of the extent and deficiency of current knowledge.

Part II. The terrestrial botany of the Tristan da Cunha Islands

1965 ◽  
Vol 249 (759) ◽  
pp. 273-360 ◽  
Keyword(s):  
Oceanic Islands ◽  
Tristan Da Cunha ◽  
Plant Life ◽  
The Pacific ◽  
Classical Studies ◽  
Macaronesian Islands ◽  
Remote Islands ◽  
St Helena ◽  
Biogeographical Province ◽  
Tristan Da Cunha Islands

The islands of Tristan da Cunha, Inaccessible, Nightingale and Gough are alike in their climate and physiography, and also in their plant and animal life. They form a single biogeographical province, and the botany of all four islands will be dealt with here. The biotas of remote islands have long been considered of unusual interest, especially since the classical studies of Darwin in the Galapagos group. To the earlier explorers, their biological productions were matters only of curiosity and some speculation, but since the publication of Darwin’s Origin of species and Alfred Russel Wallace’s Island life , it has been realized that insular biotas present features of outstanding biological, evolutionary and geographic interest. A very great deal of attention has therefore been concentrated upon studies of the plant life of many oceanic islands, especially in Hawaii (Hillebrand, 1888; Campbell 1933; Skottsberg 1940), Islas Juan Fernandez (Skottsberg 1953-56) and other `high’ islands in the Pacific (references in Merrill 1947); in the Macaronesian islands, Bermuda and St Helena (Wallace 1895; Hemsley 1885; and later references in Turrill 1953, 1959) ; and in the scattered islands of the Southern Ocean (references in Wace 1960).

Epigenetic Regulator Signatures in Regenerative Capacity

2019 ◽  
Vol 14 (7) ◽  
pp. 598-606
Author(s):  
Sarah Albogami
Keyword(s):  
Epigenetic Regulation ◽  
Animal Species ◽  
Current Knowledge ◽  
Regeneration Process ◽  
Body Parts ◽  
Lysine Methylation ◽  
Regenerative Capacity ◽  
Biological Phenomena ◽  
Epigenetic Regulator

Background:: Regeneration is the process by which body parts lost as a result of injury are replaced, as observed in certain animal species. The root of regenerative differences between organisms is still not very well understood; if regeneration merely recycles developmental pathways in the adult form, why can some animals regrow organs whereas others cannot? In the regulation of the regeneration process as well as other biological phenomena, epigenetics plays an essential role. Objective:: This review aims to demonstrate the role of epigenetic regulators in determining regenerative capacity. Results:: In this review, we discuss the basis of regenerative differences between organisms. In addition, we present the current knowledge on the role of epigenetic regulation in regeneration, including DNA methylation, histone modification, lysine methylation, lysine methyltransferases, and the SET1 family. Conclusion:: An improved understanding of the regeneration process and the epigenetic regulation thereof through the study of regeneration in highly regenerative species will help in the field of regenerative medicine in future.

scholarly journals The Wnt Signalling Pathway: A Tailored Target in Cancer

2020 ◽  
Vol 21 (20) ◽  
pp. 7697 ◽  
Author(s):  
Malvina Koni ◽  
Veronica Pinnarò ◽  
Maria Felice Brizzi
Keyword(s):  
Animal Species ◽  
Current Knowledge ◽  
Integration Site ◽  
World Health ◽  
Cancer Driver ◽  
Common Cancer ◽  
Public Health Challenges ◽  
Health Organization ◽  
Canonical Wnt ◽  
The Impact

Cancer is one of the greatest public health challenges. According to the World Health Organization (WHO), 9.6 million cancer deaths have been reported in 2018. The most common cancers include lung, breast, colorectal, prostate, skin (non-melanoma) and stomach cancer. The unbalance of physiological signalling pathways due to the acquisition of mutations in tumour cells is considered the most common cancer driver. The Wingless-related integration site (Wnt)/β-catenin pathway is crucial for tissue development and homeostasis in all animal species and its dysregulation is one of the most relevant events linked to cancer development and dissemination. The canonical and the non-canonical Wnt/β-catenin pathways are known to control both physiological and pathological processes, including cancer. Herein, the impact of the Wnt/β-catenin cascade in driving cancers from different origin has been examined. Finally, based on the impact of Extracellular Vesicles (EVs) on tumour growth, invasion and chemoresistance, and their role as tumour diagnostic and prognostic tools, an overview of the current knowledge linking EVs to the Wnt/β-catenin pathway is also discussed.

scholarly journals Evolution of temporal interaction: A comparative approach to social timing

2017 ◽  
Author(s):  
Andrea Ravignani ◽  
Sonja Kotz
Keyword(s):  
Social Behaviour ◽  
Evolutionary History ◽  
Animal Species ◽  
Comparative Approach ◽  
Evolutionary Perspective ◽  
Sensory Modalities ◽  
Temporal Interaction ◽  
Taxonomic Groups ◽  
Timing Behaviour ◽  
Timing Processes

Increasing empirical research shows a deep connection between timing processes and neural processing of social information. An integrative theoretical framework for prospective studies in humans was recently proposed, linking timing to sociality. A similar framework guiding research in non-human animals is desirable, ideally encompassing as many taxonomic groups and sensory modalities as possible in order to embrace the diversity of social and timing behaviour across species. Here we expand on a previous theoretical account, introducing this debate to animal behaviour. We suggest adopting an evolutionary perspective on social timing in animals: i.e. a comparative approach to probe the link between temporal and social behaviour across a broad range of animal species. This approach should advance our understanding of animal social timing that is, how social behaviour and timing are mutually affected, and possibly of its evolutionary history in our own lineage. We conclude by identifying outstanding questions and testable hypotheses in animal social timing.

scholarly journals Terrestrial invertebrate fauna of Polish caves – a summary of 100 years of research

2020 ◽  
Vol 33 ◽  
pp. 45-69 ◽  
Author(s):  
Joanna Kocot-Zalewska ◽  
Paweł Domagała
Keyword(s):  
Invertebrate Fauna ◽  
Research Papers ◽  
Terrestrial Invertebrate ◽  
Cave Fauna ◽  
History Of ◽  
Detailed List ◽  
Taxonomic Groups

The year 2018 is particularly important in the history of zoological research in Poland. A hundred years ago, Kazimierz Demel published the first work concerning the terrestrial cave fauna of caves in the Ojców area. In this paper we present the extent of research on the terrestrial invertebrate fauna of Polish caves in the last 100 years. All accessible research papers that have been published during this period were analysed. Based on published literature, 593 species of terrestrial invertebrate were recorded in Polish caves. Additionally, detailed list of species of individual taxonomic groups was provided.

scholarly journals Talent Research in Sport 1990–2018: A Scoping Review

2020 ◽  
Vol 11 ◽  
Author(s):  
Joseph Baker ◽  
Stuart Wilson ◽  
Kathryn Johnston ◽  
Nima Dehghansai ◽  
Aaron Koenigsberg ◽  
...  
Keyword(s):  
South America ◽  
Scoping Review ◽  
Female Athletes ◽  
Current Knowledge ◽  
Central Element ◽  
Future Research ◽  
Cognitive Variables ◽  
Inclusion Criteria ◽  
Cross Sectional ◽  
Research Designs

Several recent systematic and targeted reviews have highlighted limitations in our understanding of talent in sport. However, a comprehensive profile of where the scientific research has focused would help identify gaps in current knowledge. Our goal in this scoping review was (a) to better understand what others have done in the field of research (e.g., what groups have been examined using what research designs and in what areas), (b) to summarize the constituent areas of research in a meaningful way, (c) to help identify gaps in the research, and (d) to encourage future research to address these gaps. Peer-reviewed articles written in English that met several inclusion criteria were analyzed. A total of 1,899 articles were identified, and the descriptive findings revealed a relatively narrow focus of research on talent in sport. Specifically, the majority of examined articles focused on (a) males only, (b) the sport of soccer, (c) perceptual cognitive variables, (d) developing athletes, (e) adult samples, and (f) cross-sectional designs. For better or worse, the concept of talent remains a central element of how coaches, practitioners, and scientists think about athlete development. Findings from this scoping review highlight the continued need to explore issues related to talent identification, selection, and development in more diverse samples (e.g., female athletes and younger ages) and contexts (e.g., from Africa, Asia, and South America). There is also a clear necessity to focus on under-researched areas using alternative methodologies.

Zoogeography of the Antarctic ascidian fauna in relation to the sub-Antarctic and South America

2007 ◽  
Vol 19 (3) ◽  
pp. 321-336 ◽  
Author(s):  
Carmen Primo ◽  
Elsa Vázquez
Keyword(s):  
South America ◽  
Saint Paul ◽  
South American ◽  
South American Species ◽  
Species Classification ◽  
Antarctic Region ◽  
Antarctic Species ◽  
Tristan Da Cunha ◽  
Centre Of Origin ◽  
The Antarctic

AbstractThis study of the relationships between the Antarctic, sub-Antarctic and South America biogeographical regions used both existing and new data. We constructed a presence/absence matrix of 237 species for 27 biogeographical divisions which included the Amsterdam-Saint Paul and Tristan da Cunha islands. Species and areas were classified using cluster analysis combined with MDS ordination. Six main groups were obtained from the species classification: 1) Amsterdam-Saint Paul, and 2) Tristan da Cunha species, 3) species from the Macquarie Province, 4) species from the sub-Antarctic Region, 5) Antarctic species and species distributed in the cold regions, 6) South American species. The biogeographical components were dominated by the endemic (although it is not as high as in other groups), Antarctic-South America and Southern Hemisphere elements. Except for Amsterdam-Saint Paul, Tristan da Cunha and Bouvet, the areas considered were grouped together with Macquarie being rather related to New Zealand regions. We speculate that the Antarctic Region may have acted as an “evolutionary incubator”, providing a centre of origin for sub-Antarctic and South American ascidians.

Carnitine biosynthesis in mammals

2002 ◽  
Vol 361 (3) ◽  
pp. 417-429 ◽  
Author(s):  
Frédéric M. VAZ ◽  
Ronald J. A. WANDERS
Keyword(s):  
Fatty Acids ◽  
Energy Metabolism ◽  
Animal Species ◽  
Current Knowledge ◽  
Tubular Reabsorption ◽  
Regulatory Aspects ◽  
Micro Organisms ◽  
Endogenous Synthesis

Carnitine is indispensable for energy metabolism, since it enables activated fatty acids to enter the mitochondria, where they are broken down via β-oxidation. Carnitine is probably present in all animal species, and in numerous micro-organisms and plants. In mammals, carnitine homoeostasis is maintained by endogenous synthesis, absorption from dietary sources and efficient tubular reabsorption by the kidney. This review aims to cover the current knowledge of the enzymological, molecular, metabolic and regulatory aspects of mammalian carnitine biosynthesis, with an emphasis on the human and rat.

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