叉尾斗鱼繁殖行为的观察

Observation on the Breeding Behavior of Macropodus opercularis

采用室内研究法对叉尾斗鱼（Macropodus opercularis）的繁殖行为进行了观察，结果表明，叉尾斗鱼分批产卵。雌雄鱼交配于21：35-21：55时开始，00：44～1：56时结束，整个过程持续约3～4h，交配20～37次（Mean=28．83，n=6），时间跨度从8．9-18．6s（11．31±2．61，n=141）；只交配但雌鱼未产卵的伪交配4～6次（Mean=5．17，n=6），时间跨度从6．2～15．5S（10．27±2．51S，n=27）；只完成交配第一步的伪交配36～117次（Mean=76．83，n=6），时间跨度1．4～15．0S（5．69±2．31s，n=440）。生殖期产卵8～9批，每批卯62～1316粒（Mean=793．36，n=11）；孵卵、护幼由雄性担当。卯从产出到孵化成鱼苗离开泡巢历时约4d。野生叉尾斗鱼6～9月繁殖，产卵期水温22．4～33．5℃，溶解氧量1．1～4．2mg／L，pH值6．0～7．0。

Tbe behaviors of paradise fish Macropodus opercularis were observed in laboratory during breeding period including courtship,mating, spawning,eggs guarding and fry hatching. Paradise fish is a batch spawner. Tbey initiate mating and spawning in 21：35 to 21：55 and finished in 00：44 to 1：56.The duration of mating and spawning lasted 3 to 4 hours. Multiple mafings were recorded ranged from 20 to 37 times（Meal = 28.83, n = 6） . Each mating lasted 8.9 s to 18.6 s with mean of 11.31 ± 2.61 （n = 141 ）. Pseudmatings that female did not produce spawns after mating occurred 4 to 6 times （Mean = 5.17, n = 6）. Pseudmatings of which was only completed the first step of mating happened 36 to 117 times（ Mean=76.83,n =6）,each time only took 1.4 s to 15.0 s（5.69±2.31 s,n =440）. During the entire breeding period, the female produced spawned 8 to 9 times with 62 to 1 316 eggs each time （Mean = 793.36 for females of 76.95 to 78.35 mm in body-length. Males guarded for their eggs and fries. It took four days for egg to hatch into fry. In the nature water, paradise fish bred when water temperature is ranged 22.4- 33.5℃ , DO at 1.1 - 4.2 mg/L, and pH at 6.0 - 7.0. The breeding season lasted 4 months from June to September in nature water.