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首页> 外文期刊>Marine ecology progress series >Effects of food provisioning on site use in the short-tail stingray Bathvtoshia brevicaudata
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Effects of food provisioning on site use in the short-tail stingray Bathvtoshia brevicaudata

机译：食物供应对短尾st鱼Bathvtoshia brevicaudata现场使用的影响

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Food provisioning can have significant effects on marine wildlife. It is common practice for recreational anglers to discard fish waste back into waterways, yet the effects of incidental provisioning as a result of recreational fish cleaning on marine wildlife have not been assessed and are likely not being considered in fisheries management. At the Woollamia boat ramp in Jervis Bay, Australia, local anglers have been incidentally provisioning short-tail stingrays Bathytoshia brevicaudata through fish-cleaning activities for 30 yr. This provided an opportunity to investigate the influence of provisioning on a small scale. We used behavioural observations to assess stingray site use patterns against provisioning intensity to determine if provisioning can cause changes to the movements and behaviour of this large, marine mesopredator. Twelve female short-tail stingrays were found to use the site during observation periods for this study. Their presence was significantly correlated with the intensity of provisioning events (cumulative duration per observation session), which occurred most often in the afternoons. Significantly more stingrays visited during provisioning than pre-provisioning in simulated provisioning trials at sites where stingrays are not normally provisioned. Additionally, stingrays were considered to be exhibiting anticipatory behaviour as evidenced by increased visitation in the afternoon, irrespective of whether the fish-cleaning table was in use. These data indicate an influence of provisioning on the stingrays' movements and use of the site and has implications with respect to accepted practices for discarding fish waste.
机译：食物供应会对海洋野生动植物产生重大影响。休闲垂钓者的常见做法是将鱼废料丢弃回到水道中，但是休闲鱼清洁对海洋野生动植物造成的偶然供应的影响尚未得到评估，在渔业管理中可能没有考虑到。在澳大利亚杰尔维斯湾（Jervis Bay）的Woollamia船舷梯上，当地垂钓者偶然通过超过30年的鱼类清洁活动提供了短尾st鱼（Bathytoshia brevicaudata）。这提供了一个机会，可以在较小的范围内调查配置的影响。我们使用行为观察来根据配置强度评估黄貂鱼的站点使用模式，以确定配置是否会导致这种大型海洋中捕器的移动和行为发生变化。在本研究的观察期内，发现十二只雌性短尾黄貂鱼使用该部位。它们的存在与调配事件的强度（每个观察会话的累积持续时间）显着相关，调配事件的发生频率最常见于下午。在正常情况下未配置黄貂鱼的站点进行的模拟供应试验中，在供应过程中访问的黄貂鱼比进行预配置的次数要多得多。此外，无论是否使用鱼清洁台，下午的探视次数都增加了，因此认为黄貂鱼表现出预期的行为。这些数据表明供应对黄貂鱼的活动和场地使用的影响，并且对丢弃鱼废的公认做法具有影响。

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