Adaptive significance of multimodal signalling in male Austruca lactea under fluctuating environments

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K18613
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Ecology/Environment
• Research Institution: Kumamoto University (2016-2017); Nagasaki University (2015)
• Principal Investigator: Takeshita Fumio 熊本大学, くまもと水循環・減災研究教育センター, 特任助教 (00723842)
• Research Collaborator: MURAI Minoru 熊本大学, くまもと水循環・減災研究教育センター, 客員研究員
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 求愛行動 / シグナル / ハクセンシオマネキ / 甲殻類 / 配偶者選択 / 選好性

Outline of Final Research Achievements

The adaptive significance of multiple signalling in males of Austruca lactea was studied. Females preferred males that emit the large number of pulses per time unit. The number of attraction waves and the blood lactate levels increased with the food availability. Courtship interference by neighbor males reduced mating success. Physical obstructs influenced the mate searching duration of females. The pattern of color changes differed between carapace and the large claw of males. These results suggest that the functions differ among multiple signals, although the signals would be utilized in female mate choice as criterions. In addition, these results imply that the effectiveness of each signals differ under social and physical environments.

Free Research Field

行動生態学