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首页> 外文期刊>Annals of Applied Biology >Long-term effects of prey-availability, partnering and temperature on overall egg capsule output of 'New Zealand flatworms', Arthurdendyus triangulates.
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Long-term effects of prey-availability, partnering and temperature on overall egg capsule output of 'New Zealand flatworms', Arthurdendyus triangulates.

机译：猎物的可利用性，伙伴关系和温度对“新西兰扁虫” Arthurdendyus三角形的总卵囊产量的长期影响。

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Arthurdendyus triangulatus is an invasive terrestrial flatworm that preys on earthworms. To assess A. triangulatus egg capsule production, flatworms were maintained in ventilated polypropylene tubs (7.5 L) kept in controlled environment (CE) chambers or outdoors in the ground. Controlled environment chambers were maintained at 8 degrees C or 14 degrees C, flatworms kept singly or paired within tubs and offered Eisenia fetida according to a weight equalling one-eighth or one-half of the mean flatworm weight, or left unfed. The tubs were a successful method for keeping flatworms, with some surviving for over one year. The greatest number of egg capsules produced by an individual A. triangulatus was nine over a 16 week period for a flatworm kept at 14 degrees C and fed at the one-half regime (0.56 egg capsules flatworm-1 week-1). Although the effects of treatments varied with CE chambers, there was some evidence from flatworms kept outdoors, that feeding affected egg capsule output, with those flatworms fed at the one-half regime tending to produce more egg capsules (P=0.057). Flatworms at the one-eighth regime or that were unfed produced progressively lighter egg capsules and substantially declined in weight themselves. Nevertheless, even unfed flatworms continued to produce egg capsules for 18 weeks. The lightest egg capsule weighed 8 mg, whilst the heaviest was 180 mg. In the CE chambers at 14 degrees C, there was evidence for two different reproductive/survival strategies. Some flatworms produced cumulatively more egg capsules the longer they survived, whereas others lived longer but produced fewer egg capsules. Flatworms kept without a partner still produced egg capsules up to 35 weeks later. Egg capsules contained a mean of 4.14 (CE chambers) or 4.62 (outdoors) juveniles, with a maximum of 11. Overall, juveniles were 45% of the weight of egg capsules, although larger egg capsules had more juveniles, which comprised a greater proportion of the egg capsule. The conversion of earthworm prey to egg capsule production was estimated at 13%.
机译：Arthurdendyus triangulatus是一种侵入性陆地扁虫，以pre为食。为了评估三角藻卵囊的生产，将flat虫放在通风的聚丙烯桶中（7.5升），该聚丙烯桶存放在可控环境（CE）室内或地下室外。将受控环境箱保持在8摄氏度或14摄氏度，将扁虫单独或成对放置在盆中，并按等于扁虫平均重量八分之一或二分之一的重量提供埃塞俄比亚fetida或不进食。浴缸是保持扁虫的成功方法，有些可以存活一年以上。对于一个保持在14摄氏度并以一半状态喂食的扁虫，在16周的时间内，单个三角曲霉产生的最大数量的卵囊是9个（0.56个扁囊虫卵囊-1周-1）。尽管处理的效果随CE腔室的不同而不同，但有一些证据表明，将flat虫放在室外，进食会影响卵囊的产量，而以二分之一方式喂食的那些flat虫倾向于产生更多的卵囊（P = 0.057）。八分之一或未进食的扁虫产生的卵囊逐渐变轻，自身重量大大下降。然而，即使是未喂食的扁虫也持续产生卵囊长达18周。最轻的鸡蛋胶囊重8毫克，最重的是180毫克。在14摄氏度的CE房中，有两种不同的生殖/生存策略的证据。一些扁虫存活的时间越长，累积产生的卵囊越多，而另一些蠕虫的寿命更长，但卵囊产生的少。在没有伴侣的情况下饲养的扁虫在长达35周后仍能产生卵囊。卵囊平均含有4.14个（CE孵化室）或4.62个（室外），最大为11个。总体上，少年占卵囊重量的45％，尽管较大的卵囊中的卵幼虫更多，占较大比例卵囊的。 pre猎物到卵囊生产的转化率估计为13％。

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