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  • 首頁 環境時評人與自然最新動態焦點追蹤法律法規環境評價環保產業國內新聞國際新聞環境知識

    氣候變化

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    氣候變化可能使白鯨鯨魚深入其中

    來源:網絡整理 人氣:次瀏覽 發布時間:2019-06-12

    一個國際研究小組發現,白鯨的身體狀況會影響他們在血液和肌肉組織中儲存氧氣的能力,這可能會影響他們的潛水能力。在發表在實驗生物學雜志上的一篇論文中,發現肌肉中的肌紅蛋白和血紅蛋白,負責儲存和輸送氧氣的蛋白質的濃度分別比最高身體狀況的白鯨高12%和27%。那些條件較差的人。

    氣候變化可能使白鯨鯨魚深入其中

    “我們估計這些差異相當于身體狀況最差的鯨魚最大潛水時間減少至少三分鐘,”主要作者,曼尼托巴大學校友Emily Choy博士(博士/ 17)說,現在是麥吉爾大學的研究員。

    該研究是在2014年的一份報告中開始的,該報告發現,在過去的20年里,Beaufort Sea 白鯨的推斷增長率已經下降,這被認為是環境變化的結果。由于齒鯨的潛水深度與體型有關,因此研究小組想知道鯨魚的體型是否會因較小的鯨魚而受到影響。

    然而,研究人員發現,身體狀況而不是體重是預測血液和肌肉儲氧能力的最重要因素。Choy先前的工作表明,能量密度較低的獵物物種的向北遷移正在推動身體狀況的減少。

    “考慮到白鯨的主要獵物北極鱈魚的峰值生物量位于350至500米的深度之間,并且在最深處發現最大且能量最豐富的鱈魚,身體狀況的下降可能會影響鯨魚要到達他們喜歡的獵物,“蔡說。

    “ 物理條件和儲氧能力之間的關系可能是白鯨的惡性循環,其中環境變化導致鯨魚狀況下降,影響其覓食能力,導致其覓食能力進一步減少。利物浦大學的研究合作者Michael Berenbrink博士補充道。

    曼尼托巴大學的生物學家凱文坎貝爾博士指出:“同樣令人擔憂的是,我們的研究結果表明,影響白鯨身體狀況的環境變化也可能影響他們逃避捕食者和海冰捕獲的能力,從而導致死亡風險增加。”

    該團隊與西北地區Inuvialuit定居區的因紐特人社區合作,從77只自殺式白鯨中收集樣本。

    “我們非常感謝我們的社區合作伙伴,并感謝獵人們分享他們的鯨魚,沒有它們,這項研究是不可能的,”Choy說。“我們必須繼續共同努力,監測北部白鯨種群的健康和狀況。”

    中國環境觀察網 版權所有 ? 2005~2023 All Rights Reserved 未經中國環境觀察網書面特別授權,請勿轉載或建立鏡像 違者依法追究相關法律責任 聯系郵箱:sheng6665588@gmail.com

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