检索结果-南通市图书馆

Open Journal of Animal Sciences 2017年第2期7卷 168-178页

作者： Gen Nakamura Hiroshi Katsumata Yujin Kim Minoru Akagi Ayumi Hirose Kazutoshi Arai Hidehiro Kato Laboratory of Cetacean Biology Tokyo University of Marine Science and Technology Tokyo Japan Kamogawa Sea World Kamogawa Japan

The coast of Japan is a migratory corridor for the western stock of the gray whales (Eschrichtius robustus), which was once considered as extinct and remains endangered. According to the historical records, from 1955 to 2014, only 21 gray whales occurrence has been recorded in 59 years. However, from 2015 to 2016, intensive occurrence including the seven sightings and the two strandings were noted. In this paper, we found that those sightings were re-sightings of the same individual, which was initially sighted off Sakhalin during August, 2014. On 4 March, 2016, a young female gray whale (8.9 m in body length) was stranded at Wadaura beach, Chiba prefecture. We also conducted research on this animal including taking pictures and external measurements. In addition, we flensed this animal to observe the internal organs and collect a skeletal specimen. The reason for the death of this animal remains unclear;however, from its external characteristics, we identified that this animal was not an identical one, sighted off Sakhalin and the coast of Japan from 2014 to 2016. On 5 April, 2016, another young female gray whale (7 m in body length) was stranded at Arai beach, Shizuoka prefecture. We concluded that from 2015 to 2016, at least three distinct gray whales have migrated along the coast of Japan.

关键词： Gray Whale Eschrichtius robustus Stock stranding

Transmission of Avian Influenza Virus by Humpback Whale and Its stranding along the Atlantic Coast with CO<sub>2</sub>Emissions

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Biomedical Science and Engineering 2018年第12期11卷 359-381页

作者： Tai-Jin Kim Department of Chemical Engineering University of Suwon Hwaseong City South Korea

Humpback whales are migratory, spending summers in cooler, high-latitude waters and mating and calving in tropical and subtropical waters in 14 identified district population segments. It may be possible that the coastal areas are infected with low pathogenic avian influenza (LPAI) during the release of infected humpback whale feces. Therefore, humpback whales can be an effective reservoir of the avian influenza virus (AIV) from the Poles to the Continents to spread AIV to coastal animals. Strong ultraviolet (UV) exposure amidst CO2 emission increase and minimal sunspot number might cause mutations of aquatic virus and humpback whale in the Antarctic and the Arctic. LPAI or highly pathogenic avian influenza (HPAI) is expressed in the Continents under appropriate environmental factors. Since penguins are birds while humpback whales are marine mammals, the humpback whales infected by the mutant virus might cause interspecies transmission to a new host with evolutionary changes. The migration pattern is seasonally similar between migratory bird and humpback whale except: 1) different species of bird versus whale, 2) different landing area of land versus coast, 3) similar infection means of bird feces versus humpback whale feces. The contribution of AIV transmission by whales was several times larger than that by migratory birds. Therefore, the routes of humpback whales should be considered to prevent AIV outbreaks in addition to the flyways of migratory birds. Humpback whale stranding (y) along the Atlantic Coast of the USA was correlated with CO2 emissions (x) to have y = 0.3515x + 18.595 (R2 = 0.4069) during 1992-2016 while y = 0.0652x + 4.5847, (R2 = 0.6128) during 2016-2018. AIV outbreak in 2010 (y) along the Atlantic Coast was also correlated with humpback whale stranding (2016-2018) (x) as y = 0.1387x + 6.8184 (R2 = 0.3966). Since AIV outbreak was linearly (R2 = 0.9967) correlated with the minimum sunspot number, it was postulated that the unusual mortality event

关键词： Transmission Avian Influenza Virus Humpback Whale stranding CO2 Emissions

Shifts in hydropower operation to balance wind and solar will modify effects on aquatic biota

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Water Biology and Security 2022年第3期1卷 88-98页

作者： Henriette I.Jager Thushara De Silva Rocio Uria-Martinez Brenda M.Pracheil Jordan Macknick Oak Ridge National Laboratory Oak RidgeTN37831-6038USA National Renewable Energy Laboratory GoldenCOUSA

To avoid negative consequences to freshwater biota from climate change,society must complete the transition from fossil to renewable electricity ***,temporal patterns in hydropower generation(and flow releases that affect aquatic biota)may change with increased wind and solar *** used power cost modeling to characterize current and future within-day and seasonal patterns in hydropower generation across the Eastern Interconnection in a wet and a dry *** to the baseline,future hydropower generation across the grid decreased during the day and increased before dawn and after *** a project level,such a pattern would suggest‘double peaking’operation(up-and down-ramping before dawn and after dusk,with lower releases midday).Variation in generation was higher in wet years than dry years,foreshadowing possible flow constraints on hydropower *** the grid scale,projected ramping rates were higher in all seasons.A review of the ecological literature suggests that these changes would shift the timing of invertebrate drift and elevate the risk of nest scouring during up-ramping and the risk of stranding or dewatering during down *** conditions may be moderated by increased *** for adapting to future shifts in the renewable portfolio range from re-regulation in reservoir cascades to providing flow refuge(structures and vegetation)below individual *** basin-scale operation can distribute peaking operation to maintain grid support while restricting local ramping at critical ecological *** addition,research to design hybrid renewable systems that add battery storage is needed to understand how we can mitigate future risks to aquatic communities while promoting the use of renewable *** study,which is among the first to examine ecological side-effects of the shift to renewable energy in freshwater ecosystems,lays out a path toward understanding and navigating changes to flow regime

关键词： Wind Solar Hydropower Hydropeaking Temporal niche Double peaking Ramping stranding Dewatering PLEXOS

Annotated checklist and fisheries interactions of cetaceans in Togo, with evidence of Antarctic minke whale in the Gulf of Guinea

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Integrative Zoology 2014年第1期9卷 1-13页

作者： Gabriel H.SEGNIAGBETO Koen VAN WAEREBEEK Joseph EBOWESSIDJAOU Koffivi KETOH Takouda KKPATCHA Kotchikpa OKOUMASSOU Kossi AHOEDO Department of Zoology and Animal Biology University of LoméLoméTogo Agbo-Zegué Togolese Society for Nature ConservationLoméTogo Conservation and Research of West African Aquatic Mammals(COREWAM) c/o Department of Marine and Fisheries SciencesUniversity of GhanaLegonGhana Peruvian Centre for Cetacean Research LimaPeru Department of Fauna and Hunting Ministry of Environment and Forest ResourcesLoméTogo Department of Fisheries and Aquaculture Ministry of AgricultureAnimal Breeding and FisheriesLoméTogo

Based on strandings and captures,9 cetacean species,including 6 odontocetes and 3 mysticetes,are document-ed(photos and specimens)in Togo’s coastal waters(newly-recorded species marked with an asterisk):Antarc-tic minke whale(Balaenoptera bonaerensis*),Bryde’s whale(Balaenoptera brydei or ***),humpback whale(Megaptera novaeangliae),sperm whale(Physeter macrocephalus),pygmy sperm whale(Kogia brevi-ceps*),short-finned pilot whale(Globicephala macrorhynchus*),pantropical spotted dolphin(Stenella attenu-ata*),common bottlenose dolphin(Tursiops truncatus)and common dolphin Delphinus *** anecdotal sight-ing record for killer whale(Orcinus orca)is considered *** lack of Sousa teuszii records in Togo is consistent with its apparent contemporaneous absence in *** *** specimen,entangled in a purse seine set on small pelagics,is a first record for the Gulf of *** occurrence of this Southern Ocean species north of the equator underscores the severe gaps in our understanding of cetacean distribution off west-ern *** majority of artisanal fishermen operating in Togolese coastal waters are of Ghanaian origin and are thought to promote trade and consumption of cetacean *** captures are illegal,enforced with some success in the main fishing centers,covert landings of cetaceans are exceedingly difficult to moni-tor,quantify or *** is expressed about pollution of Togo’s coastal waters with heavy metals due to phosphorite mining and export from the coastal basin near Hahotoéand Kpogamé.

关键词： bycatches capture cetacean bushmeat dolphin Gulf of Guinea stranding whale

Crashworthiness assessment of thin-walled double bottom tanker: A variety of ship grounding incidents

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Theoretical & Applied Mechanics Letters 2019年第5期9卷 320-327,I0005页

作者： Aditya Rio Prabowo Sukmaji Indro Cahyono Jung Min Sohn Department of Mechanical Engineering Sebelas Maret UniversitySurakartaIndonesia Department of Naval Architecture and Marine Systems Engineering Pukyong National UniversityBusanSouth Korea

This study addresses the issue of ship accidental grounding as an impact phenomenon,with the assumption that an interaction of its structure with the oceanic seabed(obstruction),idealized as rock topology,is capable of initiating a so-called hard ground *** occurrence variation was considered by performing two main instances,encompassing raking and stranding,often experienced by oil/chemical tankers as thin-walled *** addition,a failure criterion was implemented on the structural geometry,in order to define its ultimate limit and possible damage,during interaction with the ***,the analysis results were compiled to assess structural crashworthiness as well as progressive failure of the double bottom part of the tanker,where energy criterion indicated the raking to be more ***,detailed observation of the failure sequence indicated the stranding to have successfully breached the inner bottom shell.

关键词： Bottom raking Ship stranding Finite element analysis Crashworthiness criteria Progressive structural failure