Examines in Marine Biology & Oceanography最新文献_第5页

Ocean Temperature Changes and Sea Level Changes 海洋温度变化和海平面变化

Examines in Marine Biology & Oceanography Pub Date : 2020-03-18 DOI: 10.31031/eimbo.2020.03.000568

Nils Axel Mörner

引用次数: 1

Seasonal Abundance and Species Composition of Cetacean Caught as By-Catch by Artisanal Driftnet Off the Niger Delta Nigeria 奈及利亚尼日三角洲手工流网附带渔获的鲸类的季节性丰度及种类组成

Examines in Marine Biology & Oceanography Pub Date : 2020-03-05 DOI: 10.31031/eimbo.2020.03.000566

Justina A Obienu

{"title":"Seasonal Abundance and Species Composition of Cetacean Caught as By-Catch by Artisanal Driftnet Off the Niger Delta Nigeria","authors":"Justina A Obienu","doi":"10.31031/eimbo.2020.03.000566","DOIUrl":"https://doi.org/10.31031/eimbo.2020.03.000566","url":null,"abstract":"A total of 315 dolphins were captured as by-catch, during the 575 fishing trips between 2017 and 2018, in two-landing sites (Imbikiri, Bayelsa State and Finima River State) offshore the Niger Delta Nigeria. The catches which consisted of 6 different species of cetacean , the short-beaked common dolphin ( Delphinus delphis ), the Risso’s dolphin ( Grampus griseus ), the Atlantic bottlenose dolphin ( Tursiops truncatus ), the Atlantic spotted dolphin ( Stenella frontalis ), Fraser’s dolphin ( Lagenodelphis hosei ). and the Long beak dolphin ( Delphinus Capensis ). The rainy season (April to August) recorded higher Cetacean catches than during the dry season (January, February, March, October, November and December). The short beaked dolphin ( Delphinus delphis), was the most abundant (over 56%) during dry and wet seasons while the least abundant was Risso dolphin ( Grampus griseus ) about 6% during the dry and wet seasons. The variable seasonal abundance and species composition of cetacean observed in this study could provide benchmarks for the sustainability of cetacean species abundance and variability in the Niger Delta and more so in the Gulf of Guinea.","PeriodicalId":192292,"journal":{"name":"Examines in Marine Biology & Oceanography","volume":"244 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121875975","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}

引用次数: 0

Importance of Environmental Management Systems in Ensuring Continual Environmental Protection in Offshore Upstream Oil and Gas Industry 环境管理体系对近海上游油气行业持续环境保护的重要性

Examines in Marine Biology & Oceanography Pub Date : 2020-02-24 DOI: 10.31031/eimbo.2020.03.000565

O. A. Dahab

引用次数: 1

Maximum Sustainable Yield, Maximum Economic Yield and Sustainability in Fisheries 渔业的最大可持续产量、最大经济产量和可持续性

Examines in Marine Biology & Oceanography Pub Date : 2020-01-08 DOI: 10.31031/eimbo.2020.03.000561

Ernesto A Chávez

引用次数: 0

Segments and Gaps in Tide Gauge Records 潮汐计记录的片段和空白

Examines in Marine Biology & Oceanography Pub Date : 2019-12-11 DOI: 10.31031/eimbo.2019.03.000560

Nils Axel Mörner

引用次数: 0

A Rarely Witnessed Summertime Upwelling Event northwest off the Hainan Island 海南岛西北海域罕见的夏季上升流事件

Examines in Marine Biology & Oceanography Pub Date : 2019-11-22 DOI: 10.5194/egusphere-egu2020-6287

A. Pan, Fangfang Kuang, Kai Li, Xu Dong

{"title":"A Rarely Witnessed Summertime Upwelling Event northwest off the Hainan Island","authors":"A. Pan, Fangfang Kuang, Kai Li, Xu Dong","doi":"10.5194/egusphere-egu2020-6287","DOIUrl":"https://doi.org/10.5194/egusphere-egu2020-6287","url":null,"abstract":"\u0000 <p>A field survey revealed a rare realization of upwelling event in the northwestern Hainan Island (UNWHI) on July 24, 2015. Model experiments suggest that the UNWHI is not locally generated, but can be treated as northward extension of the upwelling southwest off Hainan Island (USWHI) under favorable wind conditions. Therefore, presence of the USWHI is vital for the UNWHI occurrence. Tidal mixing is testified to be the primary driving force for the USWHI, whilst southerly winds plays an essential role in the induction of the UNWHI. Moreover, it is demonstrated that the UNWHI is not a stable, but intermittent coastal upwelling system. Shallow basin of the Beibu Gulf makes the interior circulation vulnerable to local monsoon changes. Given the favorable southerly winds, a cyclonic gyre northwest off Hainan Island will be induced and which, leads to northward coastal current and consequently, the UNWHI is to be formed due to the northward transport of the USWHI. Conversely, the UNWHI vanishes during northerly winds period, because the basin-scale anticyclonic gyre results in a southward current west off the Hainan Island and which, acts to push the upwelled water of the USWHI offshore and away from the northwestern Hainan Island. In addition, our diagnostics indicates that contributions from surface heat fluxes to the UNWHI occurrence is negligible. Besides, it also reminds us that application of a high-frequency, much closer to reality wind field is necessary for the coastal upwelling simulation. </p>\u0000","PeriodicalId":192292,"journal":{"name":"Examines in Marine Biology & Oceanography","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134491282","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}

引用次数: 0

Examines in Marine Biology &amp; Oceanography最新文献

Examines in Marine Biology & Oceanography最新文献