碩士 / 國立花蓮教育大學 / 生物資源與科技研究所 / 97 / The paradise fish Macropodus opercularis is native to Taiwan and exhibits particular reproductive behaviors of bubble nesting and parental care. In order to understand reproductive strategies of the paradise fish, the effects of parental body sizes, parental care, and habitat water depths on the reproductive characteristics were examined in this study. The number of eggs (r male length = 0.627, r length difference = 0.710) and hatching rate (r male length = 0.813, r length difference = 0.775) were positively correlated with the parental male length and the length difference between parents, significantly. Parental body size was not correlated with the mating success, bubble nest size, and egg distribution area. Effects of the parental care behavior on the hatching rate were examined by 4 parental care treatments of non-parent, male parent, female parent, and bi-parents. The average hatching rates of the 4 treatments were 62.0, 94.3, 83.2 and 89.9 %, respectively. The hatching rate of non-parental care treatment was significantly lower than those of the other 3 treatments, among which the hatching rates differed insignificantly. The average hatching rates of male parental, female parental, and bi-parental care treatments were 34.7, 23.2 and 35.4 % higher than that of non-parental care treatment, respectively, after the number of eggs, male length, and length difference, as a covariate, were adjusted to equal. There were six water-depth treatments of 5, 10, 20, 30, 40 and 50 cm in our study to examine the effect of habitat water-depth on the reproductive characteristics of the paradise fish. The number of eggs in the shallow-water group of 5-20 cm water-depth treatments was significantly larger than that in the deep-water group of 30-50 cm water-depth treatments, while the matching frequency, bubble nest size, egg distribution area and hatching rate differed insignificantly among the water-depth treatments. The mean hatching rate was up to 95.3 % and the coefficient of variation was only 1.57 % in the shallow-water group, and the mean hatching rate and the coefficient of variation were, in contrast, only 67.2 %, and high as 41.67 % in the deep-water group, respectively, though the hatching rates differed insignificantly between these two groups. In conclusion, strategically mating with the larger male, followed by bi-parental or male parental care, and then selecting appropriate habitat water-depth (≦ 20 cm water depth) to increase the egg production and stabilize the larvae hatching rate are beneficial for the reproductive success of the paradise fish.
| Identifer | oai:union.ndltd.org:TW/097NHLT5404003 |
| Date | January 2009 |
| Creators | Chih-Chieh Chang, 張智傑 |
| Contributors | Wen-Bin Huang, 黃文彬 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 59 |
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