在亚热带和亚南极水域繁殖的烟灰信天翁(Phoebetria fusca)所吃头足类动物与南印度洋蝶形目动物的比较

IF 2.3 3区 地球科学 Q2 OCEANOGRAPHY
Yves Cherel, Colette Trouvé
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引用次数: 0

摘要

利用从 92 个食物样本中分类的总计 ∼ 7000 个累积的鸟喙,首次确定了信天翁在亚热带阿姆斯特丹岛的头足类食物(53 个食物样本中的 3898 个鸟喙),并将其与在亚南极克罗泽群岛(39 个样本中的 3085 个鸟喙)捕食的猎物进行了比较。在阿姆斯特丹岛,信天翁捕食了 42 种头足类动物,其中包括占优势的 Histioteuthis atlantica(按喙数计算占 34.7%)和幼年 Ommastrephes cylindraceus/Todarodes filippovae(占 10.1%)。它们主要捕食纬度分布广泛的头足类(55.1%),亚热带物种排名第二(25.8%),南大洋特有物种排名第三(19.1%)。相比之下,克罗泽群岛的鸟类主要捕食南大洋特有物种(80.7%),其次是亚热带物种(14.8%)和分布广泛的类群(4.5%)。在那里,主要的猎物是Histioteuthis eltaninae成鱼(24.6%)、Batoteuthis skolops(27.2%)和Galiteuthis glacialis(16.2%)。克罗泽群岛的同域烟灰信天翁和浅褐烟灰信天翁因捕食不同的猎物而分离,这表明它们分别在群岛北部和南部的不同觅食地觅食。轻喙信天翁几乎只捕食南大洋特有的猎物(98.2%),如冰川鳕(44.4%)、冰川心理鳕(21.4%)、H. eltaninae(13.4%)和Moroteuthopsis longimana(10.2%)。将信天翁的头足类猎物纳入之前对南印度洋蝶形目动物的调查中,增加了南亚热带物种和南大洋类群。总体而言,这一广阔洋区的头足类至少有 71 个物种,包括 2 个浴足类、56 个栉孔类动物、2 个栉孔类、3 个卷足类和 7 个无卷足类章鱼,以及 Vampyroteuthid Vampyroteuthis infernalis。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Comparison of cephalopods eaten by sooty albatross Phoebetria fusca breeding in subtropical and subantarctic waters, and teuthofauna of the southern Indian Ocean

Using a total of ∼7000 accumulated beaks sorted from 92 food samples, the cephalopod diet of sooty albatross Phoebetria fusca was determined for the first time at the subtropical Amsterdam Island (3898 beaks from 53 food samples), and it was compared with prey eaten at the subantarctic Crozet Islands (3085 beaks from 39 samples). At Amsterdam Island, sooty albatross fed on 42 cephalopod taxa that included the dominant Histioteuthis atlantica (34.7% by number of beaks) and juvenile Ommastrephes cylindraceus/Todarodes filippovae (10.1%). They preyed primarily upon cephalopods that have a wide latitudinal distribution (55.1%), with subtropical species ranking second (25.8%), and Southern Ocean endemics third (19.1%). By contrast, birds from Crozet Islands fed primarily on Southern Ocean endemics (80.7%), followed by subtropical species (14.8%), and taxa with a wide distribution (4.5%). There, the main prey were adult Histioteuthis eltaninae (24.6%), Batoteuthis skolops (27.2%) and Galiteuthis glacialis (16.2%). Sympatric sooty and light-mantled sooty P. palpebrata albatrosses from Crozet Islands segregated by feeding on different prey indicating different foraging grounds north and south of the archipelago, respectively. Light-mantled sooty albatross fed almost exclusively on Southern Ocean endemics (98.2%), such as G. glacialis (44.4%), Psychroteuthis glacialis (21.4%), H. eltaninae (13.4%) and Moroteuthopsis longimana (10.2%). Including cephalopod prey of sooty albatross to the previous investigations on teuthofauna from the southern Indian Ocean added southern subtropical species to Southern Ocean taxa. Overall, teuthofauna of this vast oceanic zone hosts at least 71 cephalopod species, including two bathyteuthids, 56 oegopsids, two sepiolids, three cirrate and seven incirrate octopods, and the vampyroteuthid Vampyroteuthis infernalis.

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来源期刊
CiteScore
4.60
自引率
4.20%
发文量
144
审稿时长
18.3 weeks
期刊介绍: Deep-Sea Research Part I: Oceanographic Research Papers is devoted to the publication of the results of original scientific research, including theoretical work of evident oceanographic applicability; and the solution of instrumental or methodological problems with evidence of successful use. The journal is distinguished by its interdisciplinary nature and its breadth, covering the geological, physical, chemical and biological aspects of the ocean and its boundaries with the sea floor and the atmosphere. In addition to regular "Research Papers" and "Instruments and Methods" papers, briefer communications may be published as "Notes". Supplemental matter, such as extensive data tables or graphs and multimedia content, may be published as electronic appendices.
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