アエロビック範囲と気温の好み 黄色いタング (Zebrasoma flavescens) の現在の海温と上昇した海温
Elsa S van Hall1, Keith E Korsmeyer2
1Department of Marine Science, Hawai'i Pacific University, 1 Aloha Tower Drive, Honolulu, HI, 96813, USA. evanhall@hpu.edu.
まとめ
気候変動による海面温度 (SST) の上昇は,黄色いタングの生理学や水泳に大きな影響を与えない. しかし これらのサンゴ礁の魚は 冷たい海を好んでおり 海洋の温暖化に伴う 複雑な行動反応を示しています
科学分野:
- 海洋生物学
- 気候変動 エコロジー
- 魚の生理学
背景:
- 気候変動により,海面温度 (SST) と極端な暑さが発生しています.
- これらの変化は 珊瑚礁の生態系の生物多様性と機能に 大きな脅威をもたらします
- 黄色いタング (Zebrasoma flavescens) は,生態学的に経済的に重要なサンゴ礁の魚です.
研究 の 目的:
- 高いSSTに対する 黄色いタングの生理学的および行動的反応を調査する.
- 高温への適応が代謝率,有酸素能力,水泳能力にどのように影響するか評価する.
- 異なる熱慣性シナリオの下で黄色いタングの温度偏好を決定する.
主な方法:
- 黄色いタングは,現在の夏のSST (27°C) または上昇したSST (31°C) に慣れていました.
- 標準代謝率 (SMR),最大代謝率 (MMR),エアロビック範囲 (AS),水泳性能を測定した.
- 温度偏好 (Tpref) は,温度グラデーション室を使用して24時間以上評価されました.
主要な成果:
- 適応温度は,SMR,MMR,AS,または水泳性能に有意な影響を及ぼさなかった.
- 慣性温度に関係なく,黄色いタングは27°Cの平均Tprefを示した.
- 組成分析により,両方の適応群で利用可能な最低温度 (24-26°C) を好むことが明らかになった.
結論:
- 黄色いタングは,生理的に上昇したSSTを補償し,代謝と泳ぎの能力を維持することができます.
- 慣れ親しんだにもかかわらず,彼らの行動温度は現在の夏のSSTに近いか以下です.
- これは 生理学的に許容できない要因が このサンゴ礁魚の熱嗜好に影響を及ぼすことを示唆しています
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