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| 项目编号 | 8901115 |
| Dissertation Research: Selection Allocation and Gamete Production in Drosophila Pachea | |
| Therese Markow | |
| 主持机构 | Arizona State University |
| 开始日期 | 1989-06-15 |
| 结束日期 | 1991-11-30 |
| 资助经费 | 8000(USD) |
| 项目类别 | Standard Grant |
| 资助机构 | US-NSF（美国国家科学基金会） |
| 项目所属计划 | EVOLUTIONARY PROCESSES CLUSTER |
| 语种 | 英语 |
| 国家 | 美国 |
| 英文简介 | Females of a species generally produce relatively few, large gametes (eggs), while males produce many small gametes (sperm). A general principle in behavioral ecology is that this disparity differences observed between females and males. To understand this principle one must consider the causes of variation in reproductive success for each sex. Successful females, those which best pass their genes to the next generation, are those that most efficiently convert resources into eggs and that have a genetic predisposition to mate with a genetically superior male. A female tends not to benefit from mating with several males, since a single mating can fertilize all of her eggs. By contrast, a male can greatly enhance his reproductive success through several matings. One of the few exceptions to this rule may be Drosophila pachea, a fruit fly endemic to the Sonoran desert that lives only within rotting tissue of senita cactus. Reproductive success of D. pachea males may be limited by the number of sperm they produce. Sperm are huge, 12.5 mm long, and very helical, resembling the spring of a ballpoint pen. Males exhaust their supply of stored sperm after a few copopulations. Additionally, females tend to not receive an adequate supply of sperm to fertilize all of their eggs. Consequently females will remate several times daily. The investigators' research goal is to pattern of sperm production by D. pachea males and to describe male and female mate choice and mating strategy. Studies of the reproductive biology of Drosophila pachea should greatly contribute to the understanding of the evolution of life history traits. Further, because several close relatives of D. pachea are agricultural pests, understanding the mating system of this fly may benefit biological control programs. |
| 来源学科分类 | Biological Sciences |
| URL | https://www.nsf.gov/awardsearch/showAward?AWD_ID=8901115 |
| 资源类型 | 项目 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/340971 |
| 推荐引用方式 GB/T 7714 | Therese Markow.Dissertation Research: Selection Allocation and Gamete Production in Drosophila Pachea.1989. |
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