Pub Date : 1900-01-01DOI: 10.5181/cetology.0.31_15
Hajime Ishikawa
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Pub Date : 1900-01-01DOI: 10.5181/cetology.0.30_11
Yoshikazu Uni, K. Tateyama
Introduction Killer whales (Orcinus orca) have a cosmopolitan distribution, are commonly found in pack ice, and may extend their range into ice-covered water in the Antarctic. In the southern Okhotsk Sea, which contains the most southern offshore formation sea ice in the northern hemisphere, killer whales are often seen close to the sea ice during winter and early spring (Sato et al. 2006). On February 7, 2005, an ice-related mass stranding of killer whales occurred at Aidomari in Rausu town in the Shiretoko Peninsula (Eastern Hokkaido, Japan) and attracted great interest worldwide. Before this event, only a few ice-related mass strandings had been reported in the research community, e.g., 19 whales were stranded in Trinity Bay, Canada, in April 1957, and 2 whales were stranded off southwest Newfoundland in March 1975 (Mitchell and Reeves 1988). After the Aidomari event, based on a literature search, Uni et al. (2005) compiled seven icerelated strandings in the southern Okhotsk Sea off Hokkaido and Etorofu Island. Furthermore, Uni et al. (2017) included certain concrete evidence and made a small correction to the previous study. To consider future responses to stranding events, Westdal et al. (2016) reviewed 17 ice-related strandings both onshore and offshore ice entrapment in and before 2013 in the northern hemisphere. This study compiled ice-related strandings at the shore of killer whales in the southern Okhotsk Sea and considered criteria such as weather, tidal range, sea ice behavior, and coastal topography with reviews of responses by locals. Materials and Methods This study is based on a poster presentation for the 14th Biennial Conference on the Biology of Marine Mammals in San Diego in 2005 (Uni et al. 2005). The study area was the southernmost Okhotsk Sea, along the coast of southern Sakhalin, Hokkaido and Etorofu Island, between 44 ° and 50 °N and 142 ° and 148 °E. Information was collected for each event using the following materials: the Marine Mammal Stranding Database created by the National Museum of Nature and Science in Tokyo, which is the most comprehensive database of marine mammal stranding events in Japan (https://www.kahaku.go.jp/english/research/db/zoolo gy/marmam/index.php); official history books of the coastal municipals along the Okhotsk coast of Hokkaido; and related literature concerning sea ice in the Okhotsk Sea. When we found a particular description, extensive searches were made to seek evidence of the event (e.g., newspaper articles, images, and specimens). If there was an observer of the event, we arranged an interview with them. In addition to the abovementioned materials, we used direct observations and video analysis for the recent events. For each event, causes of ice-related stranding regarding weather, sea ice behavior, tide height, and coastal configuration were discussed. To evaluate stranding causes using these criteria, we used tide height data archived by the Japan Meteorological Agency (http://www.d
虎鲸(Orcinus orca)具有世界性的分布，通常在浮冰中发现，并可能将其活动范围扩展到南极的冰覆盖水域。在鄂霍次克海南部，包含北半球最南部的近海地层海冰，在冬季和早春，经常可以看到虎鲸靠近海冰(Sato et al. 2006)。2005年2月7日，在日本北海道东部的七子半岛的劳州镇的Aidomari发生了一起与冰有关的大规模虎鲸搁浅事件，引起了全世界的极大关注。在此事件之前，研究界只报道过几起与冰有关的大规模搁浅事件，例如1957年4月在加拿大三一湾有19头鲸鱼搁浅，1975年3月在纽芬兰西南部有2头鲸鱼搁浅(Mitchell and Reeves 1988)。Aidomari事件发生后，Uni等人(2005)在文献检索的基础上，在北海道和Etorofu岛附近的鄂霍次克海南部收集了7起相关搁浅事件。此外，Uni et al.(2017)纳入了一定的具体证据，并对之前的研究进行了小幅修正。为了考虑未来对搁浅事件的反应，Westdal等人(2016)回顾了2013年及之前北半球陆上和海上冰困的17起与冰有关的搁浅事件。这项研究汇编了鄂霍次克海南部虎鲸海岸与冰有关的搁浅情况，并考虑了天气、潮汐范围、海冰行为和海岸地形等标准，并对当地人的反应进行了回顾。材料和方法本研究基于2005年在圣地亚哥举行的第14届海洋哺乳动物生物学双年展的海报展示(Uni et al. 2005)。研究区位于鄂霍次克海最南端，沿库页岛南部、北海道和Etorofu岛海岸，北纬44°~ 50°，东经142°~ 148°之间。每次事件的信息收集使用以下材料:东京国立自然科学博物馆创建的海洋哺乳动物搁浅数据库，这是日本最全面的海洋哺乳动物搁浅事件数据库(https://www.kahaku.go.jp/english/research/db/zoolo gy/marmam/index.php);北海道鄂霍次克沿岸城市的官方历史书;以及有关鄂霍次克海海冰的相关文献。当我们发现一个特定的描述时，我们进行广泛的搜索以寻找事件的证据(例如，报纸文章，图像和标本)。如果有旁观者，我们会安排对他们进行采访。除了上述材料外，我们还对近期发生的事件进行了直接观察和视频分析。对于每个事件，与冰有关的搁浅的原因，包括天气、海冰行为、潮汐高度和海岸配置进行了讨论。为了使用这些标准评估搁浅原因，我们使用了日本气象厅存档的潮汐高度数据(http://www.data.jma.go.jp/gmd/kaiyou/db/tide/sea_l ev_var/index_hourly.php)和谷歌地图。此外，对于最近的事件，获得了鄂霍次克海2005年和之后发生的海冰卫星图像。可见光和微波卫星图像由安装在NASA发射卫星“Aqua”上的MODIS和安装在jaxa发射卫星“GCOM-W”上的AMSR2观测。卫星图像由日本宇宙航空研究开发机构地球观测研究中心提供。没有对鄂霍次克海的近海冰困进行调查。
{"title":"Ice-related Strandings of Killer Whales at Shore in the Southern Okhotsk Sea","authors":"Yoshikazu Uni, K. Tateyama","doi":"10.5181/cetology.0.30_11","DOIUrl":"https://doi.org/10.5181/cetology.0.30_11","url":null,"abstract":"Introduction Killer whales (Orcinus orca) have a cosmopolitan distribution, are commonly found in pack ice, and may extend their range into ice-covered water in the Antarctic. In the southern Okhotsk Sea, which contains the most southern offshore formation sea ice in the northern hemisphere, killer whales are often seen close to the sea ice during winter and early spring (Sato et al. 2006). On February 7, 2005, an ice-related mass stranding of killer whales occurred at Aidomari in Rausu town in the Shiretoko Peninsula (Eastern Hokkaido, Japan) and attracted great interest worldwide. Before this event, only a few ice-related mass strandings had been reported in the research community, e.g., 19 whales were stranded in Trinity Bay, Canada, in April 1957, and 2 whales were stranded off southwest Newfoundland in March 1975 (Mitchell and Reeves 1988). After the Aidomari event, based on a literature search, Uni et al. (2005) compiled seven icerelated strandings in the southern Okhotsk Sea off Hokkaido and Etorofu Island. Furthermore, Uni et al. (2017) included certain concrete evidence and made a small correction to the previous study. To consider future responses to stranding events, Westdal et al. (2016) reviewed 17 ice-related strandings both onshore and offshore ice entrapment in and before 2013 in the northern hemisphere. This study compiled ice-related strandings at the shore of killer whales in the southern Okhotsk Sea and considered criteria such as weather, tidal range, sea ice behavior, and coastal topography with reviews of responses by locals. Materials and Methods This study is based on a poster presentation for the 14th Biennial Conference on the Biology of Marine Mammals in San Diego in 2005 (Uni et al. 2005). The study area was the southernmost Okhotsk Sea, along the coast of southern Sakhalin, Hokkaido and Etorofu Island, between 44 ° and 50 °N and 142 ° and 148 °E. Information was collected for each event using the following materials: the Marine Mammal Stranding Database created by the National Museum of Nature and Science in Tokyo, which is the most comprehensive database of marine mammal stranding events in Japan (https://www.kahaku.go.jp/english/research/db/zoolo gy/marmam/index.php); official history books of the coastal municipals along the Okhotsk coast of Hokkaido; and related literature concerning sea ice in the Okhotsk Sea. When we found a particular description, extensive searches were made to seek evidence of the event (e.g., newspaper articles, images, and specimens). If there was an observer of the event, we arranged an interview with them. In addition to the abovementioned materials, we used direct observations and video analysis for the recent events. For each event, causes of ice-related stranding regarding weather, sea ice behavior, tide height, and coastal configuration were discussed. To evaluate stranding causes using these criteria, we used tide height data archived by the Japan Meteorological Agency (http://www.d","PeriodicalId":219125,"journal":{"name":"Japan Cetology","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126306531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.5181/cetology.0.29_21
K. Kojima, Tomoko Egami
{"title":"The record of whaling at Lamalera, Indonesia: the statistics and its analysis since 2010 through 2018","authors":"K. Kojima, Tomoko Egami","doi":"10.5181/cetology.0.29_21","DOIUrl":"https://doi.org/10.5181/cetology.0.29_21","url":null,"abstract":"","PeriodicalId":219125,"journal":{"name":"Japan Cetology","volume":"94 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131893849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.5181/cetology.0.29_15_20
Yoshikazu Uni
{"title":"Whale bone torii is a variation of the Western whale bone arch","authors":"Yoshikazu Uni","doi":"10.5181/cetology.0.29_15_20","DOIUrl":"https://doi.org/10.5181/cetology.0.29_15_20","url":null,"abstract":"","PeriodicalId":219125,"journal":{"name":"Japan Cetology","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115733623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The second follow-up report of “whale flensing performance” held in the Showa era in Japan.","authors":"H. Ishikawa","doi":"10.5181/cetology.0.29_1","DOIUrl":"https://doi.org/10.5181/cetology.0.29_1","url":null,"abstract":"","PeriodicalId":219125,"journal":{"name":"Japan Cetology","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131108689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Arihiro Iwata, Tomoki Ogawa, Mitsuhiro Kishimoto, Kouji Yoshida, Harushige Yoshida
The fatty acid composition of Bryde’s whale oil obtained through commercial whaling in 2019 was investi- gated and compared to the results of a reference study conducted in 1979. The measured proportion of long-chain fatty acids was higher than that obtained in the previous study. The proportion of the polyunsatu- rated fatty acids detected was approximately 1.5 times higher than that detected in the previous study. Bryde’s whale oil, as a new material, is expected to have applications in the development of healthy foods.
{"title":"Fatty Acid Composition of Bryde’s Whale Oil","authors":"Arihiro Iwata, Tomoki Ogawa, Mitsuhiro Kishimoto, Kouji Yoshida, Harushige Yoshida","doi":"10.5181/cetology.0.31_1","DOIUrl":"https://doi.org/10.5181/cetology.0.31_1","url":null,"abstract":"The fatty acid composition of Bryde’s whale oil obtained through commercial whaling in 2019 was investi- gated and compared to the results of a reference study conducted in 1979. The measured proportion of long-chain fatty acids was higher than that obtained in the previous study. The proportion of the polyunsatu- rated fatty acids detected was approximately 1.5 times higher than that detected in the previous study. Bryde’s whale oil, as a new material, is expected to have applications in the development of healthy foods.","PeriodicalId":219125,"journal":{"name":"Japan Cetology","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131572351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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