【摘要】 红螯螯虾(Cherax quadricarinatus)个体间打斗行为是影响养殖效益的重要因素。通过摄像记录，观察并分析了红螯螯虾不同个体大小、性别的打斗行为差异，以及不同环境底质和遮避物对其打斗行为的影响。结果显示：1)不同规格红螯螯虾的打斗行为特征存在差异，小规格螯虾((0.11±0.01) g)比较保守温和，中等规格螯虾((8.84±1.35) g)打斗行为最激烈，而大规格螯虾((54.32±2.99) g)打斗强度大但发起打斗更为谨慎。2)对于大规格螯虾，雄性组的打斗次数和打斗时间极显著(P<0.01)多于雌性组和异性组，而打斗强度、躲避次数和威胁次数在三个不同性别组之间均无显著差异(P>0.05)。对于中小规格螯虾，打斗强度、打斗次数、打斗持续时间、躲避次数和威胁次数等打斗参数在三个不同性别组之间均无显著差异(P>0.05)。3)在三种规格螯虾的异性组中，雄虾的打斗发起次数和打斗获胜次数均显著高于雌虾(P<0.05),显示雄性较雌性好斗，且易获胜。4)在环境中添加PVC管、鹅卵石、沙、束状筛网等底质或遮避物后，红螯螯虾的打斗次数显著减少(P<0.05)。结果表明，红螯螯虾个体长大后，雄性个体之间相遇更易引发争斗，且雄性表现出比雌性更好斗、更易取胜。建议在红螯螯虾不同养殖阶段，在养殖池中添加PVC管等各种遮避物或铺设不同底质来提高环境复杂度，以减少螯虾的打斗行为，增加养殖效益。更多还原

【Abstract】 Fighting behavior among individuals of redclaw crayfish(Cherax quadricarinatus)is an important factor affecting the efficiency of its culture.In this study, the effects of body size, gender and environmental conditions on the fighting behavior of redclaw crayfish were analyzed on observation of the video recording.The results showed that: 1)There were differences in fighting behavior among different sizes of this crayfish.Small-sized crayfish((0.11±0.01) g)were conservative and gentle, but medium-sized crayfish((8.84±1.35)g)were the most aggressive, while the large-sized crayfish((54.32±2.99) g)were more aggressive but more cautiously to initiate a fight.2)For small-sized and medium-sized crayfish, the fighting parameters of fighting intensity, fighting times, fighting duration, evading times and threatening times were all not significantly different between different gender groups(P> 0.05);for large-sized crayfish, the fighting times and fighting duration of male group(♂vs.♂)were significantly higher(P< 0.01)than those of the female group(♀vs.♀)and the heterosexual group(♀vs.♂),while the fighting intensity, evading times and threatening times were all not significantly different between different gender groups(P> 0.05).3)In the heterosexual group(♀vs.♂)of all size, the times of initiating by the males were significantly higher than those of female, as well as winning(P< 0.05),indicating that males were more aggressive and easier to win than females.4)The fighting times of crayfish was significantly reduced when PVC pipe, pebbles, sand and bunchy net were added to the environment(P< 0.05).The results of this study showed that male encounters were more likely to lead to fights than female encounters or male-female encounters, and males also tend to be more aggressive and more successful in opposite-sex fights.It is recommended that in the different stages of redclaw crayfish culture, adding various shelters such as PVC pipes or laying different substrates to set different environmental complexities in the pond to reduce the fighting behavior and increase the benefits of culture.更多还原