碩士 / 國立臺灣師範大學 / 生命科學研究所 / 100 / An individual’s reproductive success can depend on its morphological, behavioral and hormonal traits. Although many studies have explored the importance of each of these three individually to reproductive success, how they combine and how males’ and females’ traits combine to influence reproductive success are rarely explored. I paired up male and female paradise fish Macropodus opercularis to investigate (1) whether male and female fishes’ behavioral traits are related to their morphological traits and hormone levels, and (2) the relative importance of the three types of traits in both the male and the female in determining the reproductive success of a mating pair. I used standard length, condition factor and caudal fin length to represent the fishes’ morphology; aggressiveness (attack frequency) and parental care (bubble-nest area) to represent their behaviors; levels of testosterone (T), 11-ketotestosterone (KT), 17ß-estradiol (E2) and cortisol (Cort) to represent their hormones, and likelihood of spawning, latency to spawn and the number of eggs they produced to represent reproductive success. I had five main sets of results. (1) Egg production was associated positively with the female’s KT levels and the male’s T levels, but negatively with female’s T levels and the male’s KT levels. (2) Males with high levels of T built small bubble-nests. Moreoever, female partners of males which built smaller bubble-nests spawned more slowly. (3) Females with higher levels of Cort were slower to spawn. (4) Female partners of males with greater condition factor were less likely to spawn, and partners of males with longer standard length produced fewer eggs. (5) Males with longer caudal fins were less aggressive, and females with longer standard length were more aggressive. Overall, this study showed that males which provided more parental care or had higher levels of T had higher reproductive success, but that larger males or those with higher levels of KT had lower reproductive success. Moreover, females with high levels of KT had high reproductive success, but those which had higher levels of T or Cort had lower reproductive success. In conclusion, the morphological traits and hormone levels of male and female paradise fish were related to their aggressiveness and parental effort. A pair’s reproduction was correlated with both the male and female fishes’ traits. Morphological traits and hormone levels were more important than aggressiveness and parental effort, and males’ traits had a stronger association with reproduction than females’.
| Identifer | oai:union.ndltd.org:TW/100NTNU5112119 |
| Date | January 2011 |
| Creators | Chia-Yi Hu, 胡家怡 |
| Contributors | Yu-ying Hsu, 許鈺鸚 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 61 |
Page generated in 0.0018 seconds