A Young Eden’s Whale (Balaenoptera edeni edeni) Wandering in a Busy International Container Port

IF 0.8 4区 生物学 Q4 MARINE & FRESHWATER BIOLOGY
Jing Sun, Fangting Lu, Baolin Liao, Baohua Xiao, Min Li, Linyun He, Ling Bai, Bingyao Chen
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引用次数: 0

Abstract

Eden’s whale (Balaenoptera edeni edeni) is one of the least-understood baleen whales, with a global distribution that is almost completely unknown; only a few basic population studies of this species have been reported thus far. On 29 June 2021, a single Eden’s whale was sighted in Dapeng Bay, Shenzhen, a busy international container port. This sighting was the first record of a live Eden’s whale in the area, and it attracted immediate widespread attention. Our research team monitored the whale, nicknamed “Xiaobu” by Shenzhen citizens, until its disappearance. There were 48 sightings of the whale over a period of 50 days during vessel-based surveys from 2 July to 29 August 2021. Xiaobu was mainly sighted in coastal areas with a depth of 8.70 to 16.30 m; it remained 1 km offshore. The whale moved in a small minimum convex polygon range of 44.67 km2 and kernel density estimation range of 87.96 km2. From 2 to 27 July 2021, the whale was sighted near the Liquefied Natural Gas Pier in the eastern part of Dapeng Bay; it moved toward the Yantian International Container Terminal in the western part of Dapeng Bay between 28 July and 25 August, after which it was not sighted again. Its shift from east to west may have been influenced by food distribution and/or a gradual increase in familiarity with the local environment. Aerial vertical photogrammetry estimated a short body length of 7.49 m, indicating a young whale. Based on stranding records from the Chinese coastal area, the Eden’s whale population in Beibu Gulf presumably migrates northward to the East China Sea (approximately 2,000 km northeast) in April, and then returns in December. Xiaobu may have become separated from the Eden’s whale group when whales reached Shenzhen during the northward migration.
一头年轻的伊甸园鲸(Balaenoptera edeni edeni)在繁忙的国际集装箱港漫步
伊甸鲸(Balaenoptera edeni edeni)是人们最不了解的须鲸之一,其全球分布几乎完全未知;到目前为止,只有少数关于该物种的基础种群研究报告。2021年6月29日,在繁忙的国际集装箱港口深圳大鹏湾发现了一头伊登鲸。这是该地区首次记录到活的伊登鲸,立即引起了广泛关注。我们的研究小组对这头被深圳市民戏称为“小布”的鲸鱼进行了监测,直到它消失。在2021年7月2日至8月29日的50天内,共有48次鲸鱼目击事件。小布主要出现在沿海地区,深度为8.70至16.30米;它停留在离岸1公里处。鲸鱼在44.67平方公里的最小凸多边形小范围内移动,核密度估计范围为87.96平方公里。2021年7月2日至27日,在大鹏湾东部的液化天然气码头附近发现了这头鲸鱼;7月28日至8月25日期间,它向位于大鹏湾西部的盐田国际集装箱码头移动,之后再也没有被发现。它从东向西的转变可能受到食物分布和/或对当地环境熟悉程度逐渐提高的影响。航空垂直摄影测量估计,短体长为7.49米,表明是一头年轻的鲸鱼。根据中国沿海地区的搁浅记录,北部湾的伊登鲸种群可能在4月向北迁移到东海(东北约2000公里),然后在12月返回。当鲸鱼北移到深圳时,小布可能已经与伊甸园的鲸鱼群分离了。
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来源期刊
Aquatic Mammals
Aquatic Mammals MARINE & FRESHWATER BIOLOGY-ZOOLOGY
CiteScore
1.60
自引率
16.70%
发文量
99
审稿时长
>12 weeks
期刊介绍: Aquatic Mammals is a peer-reviewed journal sponsored by the European Association for Aquatic Mammals (EAAM), the Alliance of Marine Mammal Parks and Aquariums (AMMPA), and the International Marine Animal Trainers’ Association (IMATA). Aquatic Mammals publishes articles related to marine mammals (whales, dolphins, seals, fur seals, sea lions, walrus, dugongs, manatees, sea otters, and polar bears). Topics of publication on both captive animals and wild marine mammals include aspects of husbandry; behavior; conservation; veterinary medicine; anatomy; physiology; training; population trends; and the effects of pollution, climate change, and noise.
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