巴西罗卡斯环礁喇嘛湾柠檬鲨neaprion brevirostris (Poey, 1868)丰度的新资料

IF 1 4区 地球科学 Q3 MARINE & FRESHWATER BIOLOGY
Ana Laura Tribst Corrêa, Dráusio Pinheiro Véras, June Ferraz Dias
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引用次数: 0

摘要

用目测法对罗卡斯环礁喇嘛湾生物保护区柠檬鲨(negarion brevirostris)的数量和活动模式进行了重新评估。在2015年的两次探险中,我们考虑了潮汐和白天的时间来计划我们的观察。利用每日目测计数,南方夏季平均丰度为29只(最多35只),冬季平均丰度为31只(最多41只)。结果表明,经过18年的平均丰度大幅下降后,当地柠檬鲨的数量可能已经恢复。此外,该物种的运动模式证实了先前有关它们对出生地忠诚的研究。这些结果证明了在罗卡斯环礁使用非致命和非侵入性技术对柠檬鲨进行持续监测的必要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
New data on abundance of lemon shark Negaprion brevirostris (Poey, 1868) at Lama Bay, Rocas Atoll, Brazil
The abundance and movement patterns of lemon sharks ( Negaprion brevirostris) at Lama Bay, Biological Reserve Rocas Atoll, were reassessed by visual census. We considered tides and daylight periods to plan our observations during two expeditions in 2015. Using daily visual counts, the mean abundance of individuals was 29 in austral summer (maximum 35) and 31 in winter (maximum 41). The results indicated that the local lemon shark population might have recovered after 18 years of a substantial drop in mean abundance. In addition, the movement pattern of the species corroborated previous studies related to their fidelity to the birthplace. These results justify the need of continuous monitoring of lemon sharks over the course of time at Rocas Atoll using non-lethal and non-invasive techniques.
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来源期刊
CiteScore
1.60
自引率
12.50%
发文量
21
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