Nurse sharks are vulnerable of extinction in Brazil. Although its reproductive behavioral repertoire is already known, including indications that females are not passive to the attempts of males, no indication of proceptive behavior of females of this species is known. Considering that proceptive behavior is what initiates or increases the probability of a male exhibiting sexual behaviors directed at a female, the present study carried out behavioral observations in two groups of nurse sharks in reproductive period to identify possible proceptive behaviors. The present work identified a new behavior, here referred to as Body Movement (BM), as an indicator of proceptivity. This behavior corresponded on average to 47.68% of the reproductive behaviors performed by the females and its occurrence was positively correlated (r = 0.5143341 / p = 0.04152 - Spearman) with the occurrence of socio-reproductive behaviors of males. Being able to identify signs of proceptivity in animals is important to understand the reproductive context in which a group is found and to allow greater attention to animals that are able to reproduce, in order to create more efficient reproductive management programs to develop long-term sustainable population management.

中文翻译：

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身体运动作为护士鲨（Ginglymostoma cirratum）感知行为的指标

护士鲨在巴西很容易灭绝。虽然它的生殖行为谱是已知的，包括表明雌性对雄性的尝试并不被动的迹象，但没有迹象表明该物种的雌性有主动行为。考虑到性行为是引发或增加雄性对雌性发生性行为的可能性的原因，本研究对两组处于生育期的护士鲨进行了行为观察，以确定可能的性行为。目前的工作确定了一种新行为，这里称为身体运动 (BM)，作为感知的指标。这种行为平均相当于雌性生殖行为的 47.68%，并且其发生率呈正相关（r = 0.5143341 / p = 0. 04152 - Spearman）与男性社会生殖行为的发生。能够识别动物的生殖能力迹象对于了解发现群体的生殖环境并让更多地关注能够繁殖的动物非常重要，以便制定更有效的生殖管理计划以发展长期可持续的人口管理。