Deegener Falk (9 results)
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Taschenbuch. Condition: Neu. Druck auf Anfrage Neuware - Printed after ordering - Bachelor Thesis from the year 2021 in the subject Biology - Behaviour, grade: 1,3, Johannes Gutenberg University Mainz (Institute of Organismic and Molecular Evolution), language: English, abstract: This paper deals with the hypothesis, that there…is a mechanism in Lasius niger queens giving them the ability to assess the fecundity of another queen, probably through CHC¿s. The thorax length likely does not contribute to this mechanism. Cooperation between unrelated individuals provides benefits that could ensure the survival of species. This work investigates on pleometrotic choosing behavior in Lasius niger ant queens. Here, two or more unrelated and usually monogynous queens found a colony together right after their nuptial flight and cooperate up to the emergence of the first workers. Then they fight until only one of them remains. Since the surviving queen is usually more fecund and heavier than her former nestmates, it is hypothesized that she will choose smaller queens with a lower fecundity to cooperate with. Therefore, queens in special arenas with two opposite arranged branches were given different choices. Here, either both branches contained a queen of higher or lower fecundity or only one of them. Two different experiments were performed, where the queens were either grouped random or based on their fecundity. It was found that queens that were chosen over another queen later laid significantly less eggs than the rejected ones. Additionally, queens that chose a lower fecund queen were significantly faster at choosing than queens that chose a higher fecund one. Queens that chose a queen over an empty nest site also did this faster than queens that chose an empty nest site over a queen. There was no significant difference in thorax length between chosen and rejected queens. The differences in relative thorax length were only significant in one of two collection locations, where chosen queens were larger than rejected ones.
- Softcover
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Taschenbuch. Condition: Neu. The size and fecundity and the choice of pleometrotic partners in the ant Lasius niger. An analysis of the influence | Falk Deegener | Taschenbuch | Englisch | 2021 | GRIN Verlag | EAN 9783346498878 | Verantwortliche Person für die EU: preigu GmbH & Co. KG, Lengericher Landstr. 19, 49078 Osnabrück, m…ail[at]preigu[dot]de | Anbieter: preigu.
- Softcover
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Taschenbuch. Condition: Neu. Druck auf Anfrage Neuware - Printed after ordering - Praktikumsbericht / -arbeit aus dem Jahr 2020 im Fachbereich Biologie - Neurobiologie, Note: 1,7, Johannes Gutenberg-Universität Mainz, Sprache: Deutsch, Abstract: Diese Arbeit beschäftigt sich mit der Frage, ob die Taufliege Drosophila melanogaste…r durch Übung und Konsolidierung in der Lage ist, ihre Kletterleistung beim Überqueren einer Lücke zu verbessern. Dabei liegt der Fokus auf dem Kurzzeitgedächtnis (KZG) und damit der Fähigkeit, gelernte Verhaltensweisen nach kurzer Zeit zu wiederholen. Es ist davon auszugehen, dass Drosophila melanogaster fünf Gedächtnisstufen hat. Zu Beginn steht das Erlernen von Information. Die Nächste Stufe ist das zu untersuchende KZG. Darauf folgen Mittelzeitgedächtnis, anästhesieresistentes Gedächtnis und Langzeitgedächtnis. Drosophila melanogaster ist in der Lage gelerntes etwa eine Stunde im KZG zu behalten (Dubnau und Tully 1998). Der zugrundeliegende Mechanismus für das olfaktorische KZG ist bereits gut beschrieben und auch auf das motorische Lernen anwendbar. Es handelt sich hierbei um den cAMP-Signalweg. Dabei empfängt ein Kenyonzellneuron olfaktorische Eingänge im Calyx des Pilzkörpers. Der dadurch ausgelöste Calciumioneneinstrom aktiviert Calciumcalmodulin (CaM). Dieses bindet anschließend an die durch CaM und G-alpha doppelt regulierte Adenylylcyclase II (AC). Gleichzeitig erhält das Neuron den Eingang eines Modulatorneurons. Dieses schüttet den Neurotransmitter Dopamin aus. Je länger die Dopaminausschüttung anhält, desto länger hält die Signalkaskade an, was die Gedächtniskonsolidierung beeinflussen könnte. Dopaminerge G-Protein-gekoppelte Rezeptoren (DA-R) werden dadurch aktiviert und geben G-alpha frei, welches anschließend auch an die AC bindet. Die dadurch aktivierte AC stellt cyclisches Adenosinmonophosphat (cAMP) her, einen sekundären Botenstoff. cAMP aktiviert im Anschluss die Proteinkinase A (PKA), die dadurch in ihre regulatorischen und katalytischen Untereinheiten zerfällt. Die PKA phosphoryliert dann Kaliumhintergrundkanäle.
- Softcover
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Taschenbuch. Condition: Neu. Drosophila melanogaster, das Kurzzeitgedächtnis und der Wildtyp Canton-Special. Eine Analyse mit Hochgeschwindigkeitskamera | Falk Deegener | Taschenbuch | 24 S. | Deutsch | 2021 | GRIN Verlag | EAN 9783346498601 | Verantwortliche Person für die EU: GRIN Publishing GmbH, Waltherstr. 23, 80337 München…, info[at]grin[dot]com | Anbieter: preigu.
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Taschenbuch. Condition: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -Bachelor Thesis from the year 2021 in the subject Biology - Behaviour, grade: 1,3, Johannes Gutenberg University Mainz (Institute of Organismic and Molecular Evolution), language: English, abstract: This paper deals with the hypothe…sis, that there is a mechanism in Lasius niger queens giving them the ability to assess the fecundity of another queen, probably through CHC¿s. The thorax length likely does not contribute to this mechanism. Cooperation between unrelated individuals provides benefits that could ensure the survival of species. This work investigates on pleometrotic choosing behavior in Lasius niger ant queens. Here, two or more unrelated and usually monogynous queens found a colony together right after their nuptial flight and cooperate up to the emergence of the first workers. Then they fight until only one of them remains. Since the surviving queen is usually more fecund and heavier than her former nestmates, it is hypothesized that she will choose smaller queens with a lower fecundity to cooperate with. Therefore, queens in special arenas with two opposite arranged branches were given different choices. Here, either both branches contained a queen of higher or lower fecundity or only one of them. Two different experiments were performed, where the queens were either grouped random or based on their fecundity. It was found that queens that were chosen over another queen later laid significantly less eggs than the rejected ones. Additionally, queens that chose a lower fecund queen were significantly faster at choosing than queens that chose a higher fecund one. Queens that chose a queen over an empty nest site also did this faster than queens that chose an empty nest site over a queen. There was no significant difference in thorax length between chosen and rejected queens. The differences in relative thorax length were only significant in one of two collection locations, where chosen queens were larger than rejected ones. 44 pp. Englisch.
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Taschenbuch. Condition: Neu. This item is printed on demand - Print on Demand Titel. Neuware -Bachelor Thesis from the year 2021 in the subject Biology - Behaviour, grade: 1,3, Johannes Gutenberg University Mainz (Institute of Organismic and Molecular Evolution), language: English, abstract: This paper deals with the hypothesis,… that there is a mechanism in Lasius niger queens giving them the ability to assess the fecundity of another queen, probably through CHC¿s. The thorax length likely does not contribute to this mechanism. Cooperation between unrelated individuals provides benefits that could ensure the survival of species. This work investigates on pleometrotic choosing behavior in Lasius niger ant queens. Here, two or more unrelated and usually monogynous queens found a colony together right after their nuptial flight and cooperate up to the emergence of the first workers. Then they fight until only one of them remains. Since the surviving queen is usually more fecund and heavier than her former nestmates, it is hypothesized that she will choose smaller queens with a lower fecundity to cooperate with. Therefore, queens in special arenas with two opposite arranged branches were given different choices. Here, either both branches contained a queen of higher or lower fecundity or only one of them. Two different experiments were performed, where the queens were either grouped random or based on their fecundity. It was found that queens that were chosen over another queen later laid significantly less eggs than the rejected ones. Additionally, queens that chose a lower fecund queen were significantly faster at choosing than queens that chose a higher fecund one. Queens that chose a queen over an empty nest site also did this faster than queens that chose an empty nest site over a queen. There was no significant difference in thorax length between chosen and rejected queens. The differences in relative thorax length were only significant in one of two collection locations, where chosen queens were larger than rejected ones. 44 pp. Englisch.
- Softcover
- Print on Demand
Seller: buchversandmimpf2000, Emtmannsberg, BAYE, Germanybuchversandmimpf2000
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Taschenbuch. Condition: Neu. This item is printed on demand - Print on Demand Titel. Neuware -Praktikumsbericht / -arbeit aus dem Jahr 2020 im Fachbereich Biologie - Neurobiologie, Note: 1,7, Johannes Gutenberg-Universität Mainz, Sprache: Deutsch, Abstract: Diese Arbeit beschäftigt sich mit der Frage, ob die Taufliege Drosophila… melanogaster durch Übung und Konsolidierung in der Lage ist, ihre Kletterleistung beim Überqueren einer Lücke zu verbessern. Dabei liegt der Fokus auf dem Kurzzeitgedächtnis (KZG) und damit der Fähigkeit, gelernte Verhaltensweisen nach kurzer Zeit zu wiederholen. Es ist davon auszugehen, dass Drosophila melanogaster fünf Gedächtnisstufen hat. Zu Beginn steht das Erlernen von Information. Die Nächste Stufe ist das zu untersuchende KZG. Darauf folgen Mittelzeitgedächtnis, anästhesieresistentes Gedächtnis und Langzeitgedächtnis. Drosophila melanogaster ist in der Lage gelerntes etwa eine Stunde im KZG zu behalten (Dubnau und Tully 1998). Der zugrundeliegende Mechanismus für das olfaktorische KZG ist bereits gut beschrieben und auch auf das motorische Lernen anwendbar. Es handelt sich hierbei um den cAMP-Signalweg. Dabei empfängt ein Kenyonzellneuron olfaktorische Eingänge im Calyx des Pilzkörpers. Der dadurch ausgelöste Calciumioneneinstrom aktiviert Calciumcalmodulin (CaM). Dieses bindet anschließend an die durch CaM und G-alpha doppelt regulierte Adenylylcyclase II (AC). Gleichzeitig erhält das Neuron den Eingang eines Modulatorneurons. Dieses schüttet den Neurotransmitter Dopamin aus. Je länger die Dopaminausschüttung anhält, desto länger hält die Signalkaskade an, was die Gedächtniskonsolidierung beeinflussen könnte. Dopaminerge G-Protein-gekoppelte Rezeptoren (DA-R) werden dadurch aktiviert und geben G-alpha frei, welches anschließend auch an die AC bindet. Die dadurch aktivierte AC stellt cyclisches Adenosinmonophosphat (cAMP) her, einen sekundären Botenstoff. cAMP aktiviert im Anschluss die Proteinkinase A (PKA), die dadurch in ihre regulatorischen und katalytischen Untereinheiten zerfällt. Die PKA phosphoryliert dann Kaliumhintergrundkanäle.Books on Demand GmbH, Überseering 33, 22297 Hamburg 24 pp. Deutsch.
