43 research outputs found
Posición filogenética de nuevas poblaciones de alsodes (anura, alsodidae) procedentes de la Araucanía Andina, Sur de Chile
No full textEl conocimiento taxonómico y biogeográfico de los anfibios del género Alsodes, particularmente en los Andes, es precario e incompleto. En este estudio se determinó la posición filogenética de seis nuevas poblaciones del género, descubiertas en las estribaciones andinas de la Región de La Araucanía, mediante el análisis molecular más completo y actualizado realizado hasta la fecha para este grupo. La reconstrucción filogenética reveló que estas nuevas poblaciones representan dos linajes mitocondriales: uno completamente nuevo (Alsodes sp.) y otro estrechamente relacionado con A. vittatus. Ambos linajes tienen distribuciones principalmente alopátricas, pero coexisten en el estero Icalma y su afluente principal. No obstante, los individuos asociados a estos linajes no presentaron correspondencia morfológica con ninguna de las especies nominales cercanas, tanto de la vertiente oriental como occidental de los Andes, indicando un estatus taxonómico incierto. En las localidades australes de Quililche, Resbaloso y Pucón se detectó exclusivamente el linaje mitocondrial de Alsodes sp., mientras que, en la localidad más septentrional, río Pino Hachado, solo se identificó el linaje mitocondrial de A. vittatus. Este último resultó parafilético respecto al único ejemplar de A. neuquensis incluido en el análisis, lo que apoya la hipótesis de conespecificidad propuesta previamente para estas especies. Los resultados también plantean interrogantes sobre posibles eventos históricos de hibridación o introgresión mitocondrial, aspecto que requiere estudios adicionales. Estos hallazgos, resultado del esfuerzo de muestreo más exhaustivo realizado hasta ahora en la región, cubren un segmento de aproximadamente 120 km donde no se habían documentado formalmente poblaciones del género, lo que representa un avance significativo en el conocimiento biogeográfico y filogenético de Alsodes en la Araucanía andina
Replicar los datos para: Supplementary material 1 from: Troncoso-Palacios J, Diaz HA, Puas GI, Riveros-Riffo E, Elorza AA (2016) Two new Liolaemus lizards from the Andean highlands of Southern Chile (Squamata, Iguania, Liolaemidae). ZooKeys 632: 121-146
No full textAppendices : Explanation not
Distribuci\uf3n de Liolaemus torresi (Squamata: Liolaemidae), lagarto end\ue9mico del desierto de Chile
No full textDistribución de Liolaemus torresi (Squamata: Liolaemidae), lagarto endémico del desierto de Chile
No full textNo summarySin resume
Lost for more than a century: the rediscovery of Alsodes vittatus (Philippi, 1902) (Anura, Alsodidae), one of the rarest and most elusive amphibians from Chile
No full textThe legacy of the 19th-century naturalist Rudolph Philippi to the taxonomy of Chilean amphibians has been controversial since most of the species he described in 1902 have been questioned or invalidated. Here, we describe the rediscovery of Alsodes vittatus, a species that was not observed for 130 years after being collected, in three places very close to the type locality in the Andean foothills of the La Araucanía Region, Chile. The species was identified phenotypically by the vertebral line of some individuals, which turned out to be an intrapopulationally polymorphic trait. A phylogenetic analysis with mitochondrial genes, including most of the species of the genus, showed that the discovered populations of A. vittatus are paraphyletic with respect to the only individual of A. neuquensis included. We also describe populations from another area where A. vittatus was searched in the past, which we assigned here to A. igneus due to its geographic location and phylogenetic and phenotypic affinity. All these populations are part of two well-supported clades, but their relationships with nearby species (e.g., A. norae and A. barrioi) remain uncertain. These results ratify that the diversity and phylogenetic relationships of the genus in the Chilean Andes, particularly in the La Araucanía Region, are not yet well established. We discuss the possibility that A. vittatus and A. neuquensis, known until now only in Argentina, are the same species, and suggest downgrading the conservation status of A. vittatus from Critically Endangered to Endangered, considering the information from the new localities discovered
Lost for more than a century: the rediscovery of Alsodes vittatus (Philippi, 1902) (Anura, Alsodidae), one of the rarest and most elusive amphibians from Chile
No full textVolume: 1230Start Page: 195End Page: 21
Short communication: Guttation of oat and wheat and the results of its comparison with the yield
No full textSaabunud / Received 14.10.2021 ; Aktsepteeritud / Accepted 05.04.2022 ; Avaldatud veebis / Published online 05.04.2022 ; Vastutav autor / Corresponding author: Edvin Nugis; [email protected] present paper aims to give an overview of results
collected in the Estonian Crop Research Institute related to the
comparison between guttation and yield in grain crop cereals. The
objects of research were oat variety 'Eugen' and wheat 'Manu', which
went through the stages of germinating their seeds (in vitro), set them
by sprouts down into the soil, and the emergence of sprouts under
conditions of a hydrothermostat. Since transpiration in a hydrother-
mostat at an air temperature of 23 °C, and an extremely high value of air
relative humidity was limited, therefore, due to this, the plant sprouts
have begun to exude guttation fluid. As result, we have found that the
amount of isolated gutted fluid correlates significantly with the grain
yields of field trials indicators. The comparison between relative
guttation and relative yield was described by a straightforward
relationship. The entire experiment took about one week, and the first
results of droplet prints on filter paper can be obtained after 60 hours.
This was the novelty of our approach which provides the prerequisites
for both increasing the reliability of conclusions regarding the yield
obtained and with forecast
Two new Liolaemus lizards from the Andean highlands of Southern Chile (Squamata, Iguania, Liolaemidae)
No full textVolume: 632Start Page: 121End Page: 14
Artificiell Intelligens i B2B-förhandlingar. : Tillitens betydelse för upplevelser och användningen av AI i strategisk beslutsfattning.
No full textTitel: Artificial Intelligence in B2B Negotiations: The Role of Trust in Perceptions and the Use of AI in Strategic Decision-Making. Level: Student Thesis, final assignment for Bachelor Degree in Business Administration Author: Annie Sehlin och Edvin Nieminen Supervisor: Martin Ahlenius Date: 2025 - January Aim: The purpose of this study is to examine individuals' attitudes, experiences, and trust in artificial intelligence in the context of strategic decision-making in B2B negotiations. To address this purpose, three research questions have been formulated: What role does trust in AI play in the use of the technology and individuals' experiences of its benefits and drawbacks? What factors are central to the acceptance of AI in companies? What impact do gender differences have on future outlook and expectations regarding AI? Method: In order to achieve the purpose of the study, a deductive research approach was applied with a survey as the method. The population consisted of individuals within Swedish companies that use AI in strategic decision-making. Data collection was carried out using convenience, selective, and snowball sampling. A descriptive, correlation analysis and an independent sample t-test were then performed on the collected data to identify relationships. Results and conclusions: This research shows that the acceptance and use of AI are related to the trust that exists. Women report higher usage and greater trust in AI, while also experiencing fewer drawbacks compared to men. Other crucial factors include the companies' technical competence and resources, which influence the implementation of AI. To achieve successful implementation, companies should address perceived disadvantages and strengthen the trust in AI. Contribution of the thesis: The study provides insight into how factors such as trust, resources, and cognitive limitations influence companies' application of AI. Furthermore, it highlights how businesses, by investing in the right technology and building trust in AI, have the opportunity to achieve a successful implementation of AI. Suggestions for future research: For future research, the focus should be on AI's impact on various parts of the negotiation process and how companies can optimize the selection of AI tools. It would also be valuable to analyze industry-specific differences and cultural aspects to gain awareness of AI's role in international business contexts. Key words: Negotiation, B2B, negotiation process, AI and strategic decision-making
Artificiell Intelligens i B2B-förhandlingar. : Tillitens betydelse för upplevelser och användningen av AI i strategisk beslutsfattning.
No full textTitel: Artificial Intelligence in B2B Negotiations: The Role of Trust in Perceptions and the Use of AI in Strategic Decision-Making. Level: Student Thesis, final assignment for Bachelor Degree in Business Administration Author: Annie Sehlin och Edvin Nieminen Supervisor: Martin Ahlenius Date: 2025 - January Aim: The purpose of this study is to examine individuals' attitudes, experiences, and trust in artificial intelligence in the context of strategic decision-making in B2B negotiations. To address this purpose, three research questions have been formulated: What role does trust in AI play in the use of the technology and individuals' experiences of its benefits and drawbacks? What factors are central to the acceptance of AI in companies? What impact do gender differences have on future outlook and expectations regarding AI? Method: In order to achieve the purpose of the study, a deductive research approach was applied with a survey as the method. The population consisted of individuals within Swedish companies that use AI in strategic decision-making. Data collection was carried out using convenience, selective, and snowball sampling. A descriptive, correlation analysis and an independent sample t-test were then performed on the collected data to identify relationships. Results and conclusions: This research shows that the acceptance and use of AI are related to the trust that exists. Women report higher usage and greater trust in AI, while also experiencing fewer drawbacks compared to men. Other crucial factors include the companies' technical competence and resources, which influence the implementation of AI. To achieve successful implementation, companies should address perceived disadvantages and strengthen the trust in AI. Contribution of the thesis: The study provides insight into how factors such as trust, resources, and cognitive limitations influence companies' application of AI. Furthermore, it highlights how businesses, by investing in the right technology and building trust in AI, have the opportunity to achieve a successful implementation of AI. Suggestions for future research: For future research, the focus should be on AI's impact on various parts of the negotiation process and how companies can optimize the selection of AI tools. It would also be valuable to analyze industry-specific differences and cultural aspects to gain awareness of AI's role in international business contexts. Key words: Negotiation, B2B, negotiation process, AI and strategic decision-making
