萨尔瓦多濒危座头鲸的迁徙目的地,新角巨翅目(鲸足目:驼背鲸科)

IF 0.8 4区 生物学 Q4 BIOLOGY Revista De Biologia Tropical Pub Date : 2023-10-30 DOI:10.15517/rev.biol.trop..v71is4.57283
Nicola Ransome, Melvin G. Castaneda, Ted Cheeseman, John Calambokidis, Fred Sharpe
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引用次数: 0

摘要

通过空间和时间来识别个体,可以对鲸类生态学的许多方面进行研究。座头鲸(Megaptera novaeangliae)可以很容易地通过拍摄其腹尾吸片的独特形状和色素沉着模式来识别。每年冬天,中美洲座头鲸的小而濒危的独特种群(DPS)都会季节性地访问萨尔瓦多;然而,专门的研究非常有限。在2018年之前,只有11只鲸鱼被照片识别,萨尔瓦多座头鲸的迁徙目的地是未知的。近年来,照片识别的努力有所增加,今天有92只来自萨尔瓦多的座头鲸被单独识别。目的:确定萨尔瓦多座头鲸的高纬度主要觅食区。 方法:利用Happywhale在线匹配平台,通过自动图像识别将萨尔瓦多鲸鱼与全球66 043只座头鲸侥幸照片识别目录进行匹配。 结果:总共有80只(87.0%)在萨尔瓦多拍摄的鲸鱼与在北太平洋觅食区看到的个体相匹配。萨尔瓦多鲸鱼在觅食区域的观察历史从2年到29年不等(平均12.1年,标准差5.8年)。虽然我们注意到不同地区之间的调查工作可能非常不同,但萨尔瓦多座头鲸在快乐鲸上的主要觅食区域是加利福尼亚中部(n = 70, 76.1%)。在这些鲸鱼中,有21头(22.8%)在南加州也被发现过,而只有3头(3.3%)只在南加州被记录在案。此外,在加拿大不列颠哥伦比亚省南部发现了两头鲸鱼(2.2%),其中一头鲸鱼与阿拉斯加东南部的座头鲸相匹配。这头鲸鱼(性别未知)有27年的目击历史,但在繁殖区没有先前的记录,这是第一次在濒危的中美洲DPS繁殖区发现东南阿拉斯加座头鲸。结论:我们的研究表明,虽然萨尔瓦多座头鲸与北太平洋东部的各种觅食区相匹配,但它们的主要迁徙目的地是加州南部和中部。
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Migratory destinations of endangered humpback whales, Megaptera novaeangliae (Cetartiodactyla: Balaenopteridae), from El Salvador
Introduction: The study of many aspects of cetacean ecology is made possible by identifying individuals through space and time. Humpback whales (Megaptera novaeangliae) can be easily identified by photographing their ventral tail flukes’ unique shape and pigmentation patterns. The small and endangered distinct population segment (DPS) of Central America humpback whales visit El Salvador seasonally each winter; however, dedicated research has been extremely limited there. Before 2018, only 11 individual whales had been photo-identified, and the migratory destinations of Salvadoran humpback whales were unknown. In recent years, photo-identification efforts have increased, and today there are 92 individually identified humpback whales from El Salvador. Objective: To identify the main high-latitude feeding areas of Salvadoran humpback whales. Methods: Using the online matching platform Happywhale, Salvadoran whales were matched via automated image recognition to a global humpback whale fluke photo-identification catalog of 66 043 individuals. Results: In total, 80 (87.0 %) of the whales photographed in El Salvador were matched to individuals seen in North Pacific feeding areas. Sighting histories of Salvadoran whales resighted in feeding areas ranged from two to 29 years (average = 12.1, SD = 5.8). While we note that survey effort was likely very different between regions, the main feeding area of Salvadoran humpback whales on Happywhale was Central California (n = 70, 76.1 %). Of these whales, 21 (22.8 %) had also been sighted in Southern California, while just three (3.3 %) individual whales were registered only in Southern California. Additionally, two whales (2.2 %) were sighted in Southern British Columbia, Canada, and one whale was matched to a humpback whale from Southeast Alaska. This whale (of unknown sex) has a sighting history of 27 years but no prior documentation in a breeding area and is the first published sighting of a Southeast Alaskan humpback whale in the breeding area of the endangered Central America DPS. Conclusions: Our study shows that while Salvadoran humpback whales were matched to various feeding areas in the Eastern North Pacific, their primary migratory destinations are in Southern and Central California.
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来源期刊
Revista De Biologia Tropical
Revista De Biologia Tropical 生物-生物学
CiteScore
1.80
自引率
0.00%
发文量
23
审稿时长
4-8 weeks
期刊介绍: The Revista de Biología Tropical / International Journal of Tropical Biology and Conservation is a mainstream scientific journal published since 1953 and covered by Web of Science; Science Citation Index; Current Contents; Google Scholar; Scopus, SciELO and nearly 50 additional indices. A double blind system guarantees you a fair evaluation, and our world class editorial and scientific boards provides a first decision in three working days. The journal is Full Open Access and is widely read where your article can have the highest real impact. Since its beginning in 1953, the Revista follows these principles: objective and independent evaluation of all manuscripts; transparency in all processes; ethical use of procedures, data, specimens and subjects; fair treatment of all parties; and absolute predominance of scientific rigor over any other aspect.
期刊最新文献
Migratory destinations of endangered humpback whales, Megaptera novaeangliae (Cetartiodactyla: Balaenopteridae), from El Salvador Initial characterization of mitochondrial DNA control region haplotypes of the Antillean manatee (Trichechus manatus manatus, Sirenia:Trichechidae) in Guatemala Mitochondrial DNA supports the low genetic diversity of Tursiops truncatus (Artiodactyla: Delphinidae) in Bocas del Toro, Panama and exhibits new Caribbean haplotypes Characteristics and spatial identification of Antillean manatee (Trichechus manatus manatus Sirenia: Trichechidae) strandings in Guatemala More pieces for the puzzle: novel information on the genetic diversity and population structure of Steno bredanensis (Artiodactyla: Delphinidae) in Central America and the Caribbean Sea
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