Life Sciences Commons^™

The Web Amount And Quality Of Web Spiders (Agelenidae, Pholcidae), Agelena Labyrinthica (Clerck, 1757) And Holocnemus Pluchei (Scopoli, 1763), Depending On Food And Temperature, Bayda Hameed, Adi̇le Akpinar, Derya İşler Ceyhan

Turkish Journal of Zoology

The web amount and quality of web-weaving of two spider species, Agelena labyrinthica (Clerck, 1757) and Holocnemus pluchei (Scopoli, 1763), were determined depending on the temperature and the amount of food consumed. Two different experiments were set up in the study. In the first one, the spiders were raised at different temperatures (20-25 °C and 25-30 °C) under laboratory conditions and they were fed with 10 Drosophila melanogaster (Diptera: Drosophilidae) each time. In the second one, the spiders were fed with 7-10 insects caught from their natural habitats, at 20-25 °C and 25-30 °C. According to this, the difference in …

The Effect Of Streptomycin On Survival, Development, And Some Biochemical Aspects Ofdrosophila Melanogaster, Volkan Keleş, Kemal Büyükgüzel, Ender Büyükgüzel

Turkish Journal of Zoology

The effects of an aminoglycoside antibiotic, streptomycin, on survival rate, development time, and adult longevity of Drosophila melanogaster (Diptera: Drosophilidae) were examined by adding on the artificial diet at different concentrations in laboratory condition. The effect of streptomycin on malondialdehyde (MDA) and protein carbonyl (PCO) contents, superoxide dismutase (SOD), and catalase (CAT) activities in all developmental stages of D. melanogaster was also investigated. First-instar larvae were reared into diets with 600 mg/L, 1200 mg/L, and 1800 mg/L of streptomycin concentrations and were fed until the adult emergence. The highest concentration of streptomycin significantly reduced the survival rates of all development …

Happy Or Hangry Families: Does Kinship Mediate Cooperation And Cannibalism In Drosophila Melanogaster Larvae?, Lucas Khodaei

Theses and Dissertations (Comprehensive)

The fruit fly Drosophila melanogaster has a long history as a research model for studies on behaviour and group dynamics. When individuals are grouped in an environment and resources decrease, then they may behave co-operatively with one another or antagonistically compete. Hamilton’s Law states that if the benefit of helping a related individual out-weighs the cost to its direct fitness, then the individual’s indirect fitness will increase when they help their kin compared to helping an unrelated stranger. Yet it is unknown whether kinship mediates larval behaviour to encourage co-operation and/or lessen antagonistic behaviours between consanguineous individuals. In this thesis …

The Uas-Gal4 System In D. Melanogaster: An Insight Into The Influence Of Micrornas On The Developmental Pathways Of The Wing, Emily R. Wilson

Honors Theses

By examining genetic pathways in D. melanogaster, a better understanding of the homologous regulatory mechanisms in humans can be utilized to further enhance knowledge of the roles of microRNA within development. This study utilizes the UAS-Gal4 system in order to produce a mutant phenotype capable of being visually studied and analyzed, focusing on the developmental pathway of the wing in D. melanogaster. Dissections of the wandering third instar larvae yielded wing disc tissue expressing the downregulation of loquacious and CG17386.

Effects Of Melatonin On Heartbeat And Possible Identification Of A Melatonin Receptor In Drosophila Melanogaster, Tricia L. Vankirk

Electronic Theses and Dissertations

Chapter 1 of this manuscript is a literature review that serves as an introduction to the entire dissertation. Chapter 2 examines the effects of the melatonin injection on heart rate and rhythmicity in Drosophila melanogaster Canton-S (wild-type) pupae and pupae bearing a variety of heart mutations. Chapter 3 investigates further the possible mechanisms of melatonin’s ability to increase heart rhythmicity without significantly affecting heart rate. A melatonin antagonist, luzindole; a high-affinity melatonin agonist, 2-iodomelatonin and RNAi techniques are used to identify a possible melatonin receptor in Drosophila melanogaster.

An appendix contains a previously published manuscript detailing experiments performed at the …

The Effects Of Larval Diet Restriction On Developmental Time, Preadult Survival, And Wing Length In Drosophila Melanogaster, Pinar Güler, Nazli Ayhan, Can Koşukcu, Banu Şebnem Önder

Turkish Journal of Zoology

Environmental stress effects on life history traits have been shown by many studies up to the present. Organisms are frequently affected by nutritional stress in nature. Nutritional restriction has been used as an artificial environmental stress by scientists since 1935. As a result of such studies, it is known that nutritional intake during developmental stages can affect many life history traits as a response to environmental stress in Drosophila melanogaster. In this study, we used 15 different diet regimes with variable yeast and sugar concentrations to test the effects of dietary changes on viability, developmental time, and wing size. Our …

The Effects Of Serotonin On The Courtship Behavior Of Drosophilia Melanogaster, Nicholas James Brandmeir

Electronic Theses and Dissertations

In Drosophila, the male courtship ritual is stereotyped and under the control of several genes including fruitless. In previous studies, it has been show that various fruitless alleles cause phenotypic abnormalities in the D. melanogaster courtship ritual. It is also known that there is a high level of co-expression of both the fruitless gene product and serotonin in specific neurons of the Drosophila CNS. This study examines the role of serotonin in the Drosophila male courtship ritual by using a mutant strain, Ddc^ts1,in which the production of serotonin is blocked above 30°C. In this study an increase in temperature caused …

Implications Of Locus Specific Microevolution Inferred By Genetic Distances Between Two Local Populations Of Drosophila Melanogaster From Turkey, Ergi̇ Deni̇z Özsoy

Turkish Journal of Zoology

The standard genetic distances were calculated with 3 allozyme loci in 2 local populations of Drosophila melanogaster from Turkey. One of the distances, i.e. obtained with alcohol dehydrogenase (Adh), was completely different from the distances with the other 2 allozyme loci, glycerophosphate dehydrogenase (\alphaGpdh) and cytosolic malate dehydrogenase (Mdh1), leading to a statistically significant inflation in the cumulated distance value obtained over the 3 loci. It is shown that this final significant value was caused by the significant difference in allelic frequencies at the Adh loci across local populations. Implications of the different genetic distances in 2 local populations are …

Effect On Heartbeat Of Drosophila Melanogaster Of Mutations In The Calcium Channel Encoding Cacophony Gene And Its Interaction With The Rna Helicase Mutant Maleless^Napts, Vanessa Mcgowan

Electronic Theses and Dissertations

There is a lack of information concerning the genetics of heart disease, especially of those due to aberrant pacemaker activity. Drosophila melanogaster is an ideal candidate for research in this area because of its suitability to genetic manipulation and its accessible genetic database. What is most compelling, however, is that the genesis of heartbeat is Drosophila is strikingly similar to that in many other organisms, including mammals. The myogenic heart of DrosophiIa melanogaster is stimulated to contract by a caudal pacemaker, which is regulated by ion channel interactions. A voltage-gated calcium channel of PIQ- or N-type is implicated in the …

The Effects Of 2,4-D And 4-Cpa On The Duration Of Development And The Number Of Adults In F_1, F_2 And F_3 Generations Of Drosophila Melanogaster, Bülent Kaya, Ati̇la Yanikoğlu

Turkish Journal of Zoology

In this study, effects of two hericides on pupa formation period, pupa period and number of adults in F_1, F_2 and F_3 generations of Drosophila melnogaster were investigated. 300 ppm concentraiton of 2-4-D applied on parent stock and F_1 generation has lengtened the pupa formation period and pupa period of D. melanogaster in F_1 generation, while it reduced the number of adults another effective concentration was 100 ppm which has shortened the pupa period in F_3 generation. The highest concentration (100 ppm) of 4-CPA applied on parent stock and F_1 generation has lengtened the pupa formation period in F_1 generation. …

Isolation And Characterization Of Autosomal Male Sterile Mutants In Drosophila Melanogaster, Lynn J. Romrell

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In order to study the genetic control of spermiogenesis, recessive, male-sterile, autosomal mutants of Drosophila melanogaster were induced with ethyl methanesulfonate. A total of 31 mutants were recovered, 15 of which were located on the second chromosome and 16 on the third chromosome. Eight second- and 6 third-chromosome mutants demonstrating sterility in all homozygous males were used for further analysis.

Complementation tests showed that 2 of the 8 second chromosome mutants (and none of the 6 third chromosome mutants) were noncomplementing, indicating that two of the mutants produced were alleles of the same locus. Mapping of the second chromosome mutants …

The Effects Of Formaldehyde On The Frequency Of Reversion Of The White-Ivory Mutant Of Drosophila Melanogaster, Ruth Ellen D. Wood

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study is an analysis of the effects of formaldehyde, a chemical which is both recombinogenic and mutagenic, on white-ivory (wⁱ) a highly mutable allele of the white locus of Drosophila. Formaldehyde is shown to significantly increase the reversion frequency of wⁱ. The results of this investigation differ from earlier observations in three respects: (1) there is a positive correlation between RNA (ribonucleic acid) concentration and reversion frequency in the presence of formaldehyde, but reversion does not appear to be totally RNA dependent; (2) female germ cells are more sensitive than those of the male; …

The Apparent Genetic Relationship Between Campaniform And Trichoid Sensilla On Drosophila Wings, Vern Sisson, Charles L. Hamrum, Arthur W. Glass

Journal of the Minnesota Academy of Science

No abstract provided.