New insights into the trophic ecology of young white sharks (Carcharodon carcharias) in waters off the Baja California Peninsula, Mexico

Tamburin Elena; Elorriaga-Verplancken Fernando R.; Estupinan-Montano Colombo; Madigan Daniel J.; Sanchez-Gonzalez Alberto; Padilla Mauricio Hoyos; Wcisel Michelle; Galvan-Magana Felipe

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New insights into the trophic ecology of young white sharks (Carcharodon carcharias) in waters off the Baja California Peninsula, Mexico

机译：在墨西哥Baja California Peninsula的水域中年轻白鲨（Carcharodon Carcharias）的营养生态学洞察力新的见解

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White sharks (Carcharodon carcharias) are described as generalist predators, with a demonstrated ontogenetic dietary shift which occurs between subadult and adult life stages. Trophic ecology studies on white shark have been focused mainly on large and mature individuals, necessitating studies of young white shark trophic ecology to better understand their resource use. This study provides new insights into young white shark diet in the North eastern Pacific Ocean using stable isotope analysis in muscle tissues. We analyzed delta C-13 and delta N-15 values of young white shark muscle (n=21) from Sebastian Vizcaino Bay (SBV) during 2015-2018. We found changes in prey composition across early [neonates, young-of-the-years (YOYs), juveniles] white shark life stages, with significant changes in isotopic composition throughout early ontogeny. Mixing model results indicate a high use of coastal areas for foraging, mainly for juvenile stages and the substantial contribution of pelagic preys (e.g., S. japonicus, Prionotus spp., Cynoscion spp., S. sagax, etc.) in YOYs, white shark diet also indicates an important role of offshore foraging. This change in isotopic composition likely represents the shift from the embryo's typical maternally derived isotopic signature, incorporated in offshore foraging regions, to the postpartum isotopic composition incorporated by foraging neonates in inshore nursery habitats. This study provides relevant information regarding young white shark feeding preferences, reinforces the importance of coastal areas as critical habitat for the development and the successful foraging of this species, and also provides indirect insights on the feeding habits of the adult female of white sharks, which constitutes a baseline for further research.

机译：白鲨（Carcharodon Carcharias）被描述为一般主义的捕食者，并在亚地区和成人寿命之间进行了展示的植物饮食。关于白鲨的营养生态学研究主要集中在大型和成熟的个人身上，需要研究年轻的白鲨营养学生态学，以更好地了解他们的资源使用。本研究在肌肉组织中使用稳定的同位素分析，对东北太平洋的年轻白鲨饮食提供了新的洞察力。在2015 - 2018年，我们分析了来自Sebastian Vizcaino Bay（SBV）的年轻白鲨肌（N = 21）的Delta C-13和Delta N-15值。我们发现早期的猎物组合的变化[新生儿，年龄（同比），青少年]白鲨生命阶段，同位素组成的显着变化，在早期的组织发生。混合模型结果表明沿海地区的沿海地区使用，主要用于少年阶段和胸腺毛皮的实质性贡献（例如，S.Paponicus，Prionotus SPP。，Cynoscion SPP。，S. Sagax等）在同学中，白色鲨鱼饮食也表明海上觅食的重要作用。同位素组合物的这种变化可能代表胚胎典型的母体衍生的同位素签名，其在海上觅食地区掺入，该组合物通过在患有肢体苗圃栖息地中觅食新生儿的产后同位素组合物。本研究提供了有关年轻白鲨喂养偏好的相关信息，加强了沿海地区作为关键栖息地的发展和成功觅食本物种的重要性，并对白鲨成年女性的饲养习惯提供间接洞察，这构成进一步研究的基线。

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《Marine biology》 |2020年第5期|55.1-55.14|共14页
作者
Tamburin Elena; Elorriaga-Verplancken Fernando R.; Estupinan-Montano Colombo; Madigan Daniel J.; Sanchez-Gonzalez Alberto; Padilla Mauricio Hoyos; Wcisel Michelle; Galvan-Magana Felipe;
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Inst Politecn Nacl Ctr Interdisciplinario Ciencias Marinas Av IPN S-N La Paz 23096 Baja California Mexico|Fdn Alium Pacific Carrera 26 5C-13 Cali Colombia;

Inst Politecn Nacl Ctr Interdisciplinario Ciencias Marinas Av IPN S-N La Paz 23096 Baja California Mexico;

Fdn Alium Pacific Carrera 26 5C-13 Cali Colombia;

Harvard Univ Dept Organismal & Evolutionary Biol Cambridge MA 02138 USA;

Inst Politecn Nacl Ctr Interdisciplinario Ciencias Marinas Av IPN S-N La Paz 23096 Baja California Mexico;

Pelagios Kakunja AC Sinaloa 1540 Col Los Garzas La Paz 23070 Baja California Mexico|Fins Attached Marine Res & Conservat 19675 Still Glen Dr Colorado Springs CO 80908 USA;

Michigan State Univ Museum 409 W Circle Dr E Lansing MI 48824 USA;

Inst Politecn Nacl Ctr Interdisciplinario Ciencias Marinas Av IPN S-N La Paz 23096 Baja California Mexico;

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1. Isotopic niche and resource sharing among young sharks (Carcharodon carcharias and Isurus oxyrinchus) in Baja California, Mexico [J] . Tamburin Elena, Kim Sora L., Elorriaga-Verplancken Fernando R., Marine ecology progress series . 2019,第MARa21期

机译：墨西哥下加利福尼亚州的幼鲨（Carcharodon carcharias和Isurus oxyrinchus）之间的同位素生态位和资源共享
2. Insights into young of the year white shark, Carcharodon carcharias, behavior in the Southern California Bight [J] . Dewar H, Domeier M, Nasby-Lucas N Environmental Biology of Fishes . 2004,第2期

机译：洞悉年度白鲨（Carcharodon carcharias）在南加州湾的行为
3. Sex, size and isotopes: cryptic trophic ecology of an apex predator, the white shark Carcharodon carcharias [J] . French G. C. A., Rizzuto S., Sturup M., Marine biology . 2018,第6期

机译：性别，大小和同位素：尖顶捕食者，白鲨Carcharodon carcharias的神秘营养生态
4. Two New-born Great White Sharks, Carcharodon Carcharias(linnaeus, 1758) (lamniformes; Lamnidae) From Turkish waters Of The North Aegean Sea [C] . Hakan KABASAKAL, Sait OEZGUER GEDIKOGLU . 2008

机译：两只新生的大白鲨，Carcharodon Carcharias（linnaeus，1758年）（lamformes; Lamnidae），来自北爱琴海的土耳其水域
5. Feeding structures of the white shark, Carcharodon carcharias (Linnaeus), with notes on other species. [D] . Powlik, James John. 1989

机译：白鲨的摄食结构，Carcharodon carcharias（Linnaeus），有关于其他物种的注释。
6. Sex size and isotopes: cryptic trophic ecology of an apex predator the white shark Carcharodon carcharias [O] . G. C. A. French, S. Rizzuto, M. Stürup, -1

机译：性别大小和同位素：尖顶捕食者白鲨Carcharodon carcharias的神秘营养生态
7. Using Stable Isotope Analysis to Understand the Migration and Trophic Ecology of Northeastern Pacific White Sharks (Carcharodon carcharias) [O] . Carlisle, Aaron B., Kim, Sora L., Semmens, Brice X., 2012

机译：使用稳定同位素分析了解东北太平洋白鲨（Carcharodon carcharias）的迁移和营养生态

New insights into the trophic ecology of young white sharks (Carcharodon carcharias) in waters off the Baja California Peninsula, Mexico

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