Elucidation of factors affecting mortality during early life stages of megabenthos: comparative study on megabenthic species with different reproductive season

巨型底栖动物生命早期死亡率影响因素的阐明：不同繁殖季节巨型底栖动物的比较研究

• 批准号: 23780206
• 负责人: KEITA Kodama
• 金额: $ 2.83万
• 依托单位: National Institute for Environmental Studies
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2013
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23780206/
• 关键词: 個体数変動; 初期生活史; 底棲魚介類; 貧酸素; 水温; 東京湾; 貧酸素水塊; 再生産

To elucidate common or different mechanisms of synchronous stock decline of megabenthos with different reproductive season in Tokyo Bay, factors affecting mortality during the early life stages of mantis shrimp (Oratosquilla oratoria; summer spawner) and marbled sole (Pseudopleuronectes yokohamae; winter spawner) were investigated.Field surveys revealed that mortality between larval and juvenile stages might have affected abundance of mantis shrimp. Analysis of spatio-temporal changes in juvenile mantis shrimp and environmental factors showed that hypoxia could cause failure of settlement and contraction of spatial distribution of juveniel, thereby resulted in decrease of young-of-the-year abundance. On the other hand, field surveys revealed that water temperature was a critical factor affecting young-of-the-year abundance of marbled sole; increase in water temperature during reproductive season might have affected mortality of marbled sole between spawning and early larval stages.

为了阐明东京湾不同繁殖季节巨型底栖动物种群同步下降的共同或不同机制，对影响虾蛄（Oratosquilla oratoria；夏季产卵者）和大理石鳎（Pseudopleuronectes yokohamae；冬季产卵者）生命早期死亡率的因素进行了调查。 阶段可能影响了螳螂虾的丰度。对幼螳螂虾时空变化和环境因素的分析表明，缺氧会导致幼虾沉降失败，空间分布收缩，从而导致幼虾丰度下降。另一方面，实地调查表明，水温是影响石鳎幼苗丰度的关键因素。繁殖季节水温的升高可能会影响产卵和早期幼虫阶段之间的大理石鳎的死亡率。

项目成果

Changes in life history traits of megabenthic species in Tokyo Bay, Japan, concurrent with decrease in their stock sizes

日本东京湾巨型底栖物种生活史特征的变化与其种群规模的减少同时发生

• 发表时间: 2012
• 作者: Kodama K;Lee JH;Park JC;Shiraishi H;Horiguchi T
• 通讯作者: Horiguchi T

Changes in the megabenthic community structure in relation to environmental variations in Tokyo Bay, Japan. In : Daniels JA (ed.) Advances in Environmental Research

日本东京湾与环境变化相关的巨型底栖动物群落结构的变化。

• 发表时间: 2012
• 作者: Kodama K;Horiguchi T
• 通讯作者: Horiguchi T

Phenotypic changes in reproductive traits with changes in stock size of the starspotted smooth-hound Mustelus manazo in Tokyo Bay, Japan

日本东京湾星斑光滑猎犬 Mustelus manazo 繁殖性状的表型变化与种群大小的变化

• DOI: 10.1007/s12562-012-0580-7
• 发表时间: 2013
• 期刊: Fisheries Science
• 影响因子: 1.9
• 作者: Jeong-Chae Park;Masaaki Oyama;Jeong-Hoon Lee;Keita Kodama;Yasuhiko Ohta;Atsuko Yamaguchi;Hiroaki Shiraishi & Toshihiro Horiguchi
• 通讯作者: Hiroaki Shiraishi & Toshihiro Horiguchi

Surveys on environmental pollution and possible adverse effects by radionuclides in wildlife, after severe accidents of Fukushima Dai-ichi Nuclear Power Plants, Japan

日本福岛第一核电站严重事故后环境污染和放射性核素对野生动物可能造成的不利影响的调查

• 发表时间: 2012
• 作者: Horiguchi T;Kodama K;Ihara S;Takase M;Ohta;Yoshii H;Mizuno S;Kamiyama K;Maki H;Tanaka A;Karube S;Shiraishi H;Ohara T
• 通讯作者: Ohara T

Upregulation of hypoxia-inducible factor (HIF)-1α and HIF-2α mRNA levels in dragonet Callionymus valenciennei exposed to environmental hypoxia in Tokyo Bay

• DOI: 10.1016/j.marpolbul.2012.05.002
• 发表时间: 2012-07-01
• 期刊: MARINE POLLUTION BULLETIN
• 影响因子: 5.8
• 作者: Kodama, Keita;Rahman, Md. Saydur;Thomas, Peter
• 通讯作者: Thomas, Peter