排序方式: 共有62条查询结果,搜索用时 0 毫秒
61.
Inoue S Oshima Y Usuki H Hamaguchi M Hanamura Y Kai N Shimasaki Y Honjo T 《Chemosphere》2006,63(5):881-888
We examined the effect of tributyltin (TBT) on embryonic development of the Manila clam, Ruditapes philippinarum. In a maternal exposure test, 100 clams were exposed to TBT at measured concentrations of <0.01 (control), 0.061, 0.310, or 0.350 microg/l at 20-22 degrees C for 3 weeks, and the embryo developmental success (the ratio of normal D-larvae to all larvae) was measured. There was a significant negative correlation between embryo developmental success and TBT concentration in the female Manila clams (p < 0.001). These results indicated that TBT accumulated in the female clam decreased embryo developmental success. In a waterborne exposure test, fertilized eggs (4 h after fertilization) were exposed to TBT at measured concentrations of <0.01 (control), 0.062, 0.140, 0.320, or 0.640 microg/l for 23 h. Embryo developmental success was also significantly decreased in all TBT treatment groups compared with that in the control group. TBT accumulated in female adults and waterborne TBT clearly inhibit reproductive success of the clam. 相似文献
62.
Nakano R Ishikawa Y Tatsuki S Surlykke A Skals N Takanashi T 《Die Naturwissenschaften》2006,93(6):292-296
Although sex pheromone communication in the genus Ostrinia (Lepidoptera: Crambidae) has been studied intensively, acoustic communication in this genus has not been explored. In this
study, we report that male-produced ultrasound serves as a courtship song in the Asian corn borer moth, O. furnacalis. Upon landing close to a pheromone-releasing female, a male showed a series of courtship behaviors involving emission of
ultrasound. The sounds were produced when the wings were vibrated quickly in an upright position. The male song was composed
of chirps, i.e., groups of pulses (duration of a chirp = 58.9 ms, 8.8 pulses/chirp), with a broadband frequency of 25–100 kHz.
In flight tunnel experiments, deaf and hearing females showed a significant difference in the incidence of three behavioral
responses to courting males, i.e., immediate acceptance, acceptance after walking, and rejection. Deaf females showed more
‘rejection’ and less ‘acceptance after walking’ than hearing females, indicating that the detection of male-produced ultrasound
plays an important role in the acceptance of a male. The findings are discussed in the context of exploitation of receiver
bias and mate choice. 相似文献