Oceanography & Fisheries Open access Journal最新文献

Uncovering the Effects of the Southwest Monsoon on Fishing Activity in the Indian Ocean with VIIRS Boat Detection Data 利用VIIRS船探测数据揭示西南季风对印度洋渔业活动的影响

Oceanography & Fisheries Open access Journal Pub Date : 2023-10-12 DOI: 10.19080/ofoaj.2023.16.555948

Namrata Chatterjee

引用次数: 0

Discovering Hidden Offshore Lighting Structures with Multiyear Low-Light Imaging Satellite Data 用多年的低光成像卫星数据发现隐藏的近海照明结构

Oceanography & Fisheries Open access Journal Pub Date : 2023-08-14 DOI: 10.19080/ofoaj.2023.16.555944

Christopher D Elvidge

{"title":"Discovering Hidden Offshore Lighting Structures with Multiyear Low-Light Imaging Satellite Data","authors":"Christopher D Elvidge","doi":"10.19080/ofoaj.2023.16.555944","DOIUrl":"https://doi.org/10.19080/ofoaj.2023.16.555944","url":null,"abstract":"The NASA/NOAA Visible Infrared Imaging Radiometer Suite (VIIRS) day/night band (DNB) has a capability to detect lighting present at the earth’s surface. This low-light imaging capability was built to satisfy a requirement from meteorologists to detect clouds at night in the visible based on reflected moonlight. On land, human settlements are the dominant source of DNB detected surface lighting. Lights are also detected offshore primarily arising from fishing boats using lights to attract catch. In 2015, the Earth Observation Group developed the VIIRS Boat Detection (VBD) product and today several fishery agencies use VBD data to monitor fishing activity and compliance with closures. Recently EOG compiled the full record VBD detections as a 15 arc second global grid. The record spans 2012-2021 in Asia and 2017-2021 elsewhere. Upon reviewing the multiyear accumulation of VBD detections we were surprised to find a diversity of previously unseen lighting features [1]. These structures are not evident in VBD from single nights but are only revealed by accumulating the detections across a year or more. The additional features include lit platforms, transit lanes, and vessel anchorages associated with ports and passage straits. Another surprising finding is geopolitical divisions in the density of cumulative vessel detections. In this paper we provide a look into one of the densest areas of VBD detections in the world, from the Yellow Sea, East China Sea and Sea of Japan (East Sea).","PeriodicalId":308766,"journal":{"name":"Oceanography & Fisheries Open access Journal","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135307923","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

Controlling Factors of the Population Dynamics of Two Dominant Bivalves of the Macro-benthic Community on the Sandy Tidal Flats 沙质潮滩大型底栖生物群落两种优势双壳类种群动态的控制因素

Oceanography & Fisheries Open access Journal Pub Date : 2021-07-15 DOI: 10.19080/ofoaj.2021.14.555879

H. Tsutsumi

引用次数: 0

Women in West African Mangrove Oyster (Crassostrea Tulipa) Harvesting, Contribution to Food Security and Nutrition in Ghana 西非红树林牡蛎(长牡蛎)收获中的妇女，对加纳粮食安全和营养的贡献

Oceanography & Fisheries Open access Journal Pub Date : 2021-07-09 DOI: 10.19080/OFOAJ.2021.14.555878

H. Agbekpornu

引用次数: 1

Ecological Significance of the Late Occurrence of Halophila stipulacea (Hydrocharitaceae, Tracheophyta) on the Southern Levantine Mediterranean Shores of Israel 以色列地中海南黎凡特海岸晚出现的Halophila tolacea(水螅科，气管植物)的生态学意义

Oceanography & Fisheries Open access Journal Pub Date : 2021-07-06 DOI: 10.19080/OFOAJ.2021.14.555877

Hoffman Razy

引用次数: 1

Diversity and Taxonomical Identification of Rays in Pondicherry (Puducherry) Coastal Waters 本地樱桃(Puducherry)沿海水域射线的多样性和分类鉴定

Oceanography & Fisheries Open access Journal Pub Date : 2021-07-06 DOI: 10.19080/OFOAJ.2021.14.555876

Nithyamary Srinivasan

引用次数: 0

A comparative Study of Diatom Flora of the Taleghan River in Iran with Other Studies Around the World 伊朗塔勒甘河硅藻区系与世界其他地区的比较研究

Oceanography & Fisheries Open access Journal Pub Date : 2021-06-16 DOI: 10.19080/ofoaj.2021.13.555874

A. Naseri

引用次数: 0

Exotic Pumpkinseed Sunfish Lepomis gibbosus (Linnaeus, 1758) in the International Minho River (Iberian Peninsula), and Parasitic Association with Myzobdella lugubris Leidy, 1851 (Annelida, Hirudinea) 国际米尼奥河(伊比利亚半岛)的外来南瓜子太阳鱼Lepomis gibbosus (Linnaeus, 1758)及其与Myzobdella lugubris Leidy的寄生关系(水蛭目)

Oceanography & Fisheries Open access Journal Pub Date : 2021-06-08 DOI: 10.19080/ofoaj.2021.13.555872

A. Lages, D. Costa, N. Gomes, C. Antunes

{"title":"Exotic Pumpkinseed Sunfish Lepomis gibbosus (Linnaeus, 1758) in the International Minho River (Iberian Peninsula), and Parasitic Association with Myzobdella lugubris Leidy, 1851 (Annelida, Hirudinea)","authors":"A. Lages, D. Costa, N. Gomes, C. Antunes","doi":"10.19080/ofoaj.2021.13.555872","DOIUrl":"https://doi.org/10.19080/ofoaj.2021.13.555872","url":null,"abstract":"To evaluate the establishment of the emerged species Lepomis gibbosus (Linnaeus, 1758) in the international section of the Minho River (Iberian Peninsula) the abundance was analysed for 7 years. This study also describes the world’s first record of parasitism between the leech Myzobdella lugubris Leidy, 1851 and L. gibbosus. The earliest record of species L. gibbosus , also known as pumpkinseed sunfish, was in the Spanish area of the Minho River basin, in the beginning of the 2000s. It is considered an established species in the estuary, due to its ecological release capacity, which has been increasing over the last few years. Physical condition, age, feeding patterns, and reproduction habits were analysed from July 2014 to October 2015. Individuals sampled appear in a good physical condition (b>3). The oldest individual captured was 4 years old, with L max =18.6cm. Females have a higher gonadosomatic investment than males (F 1;585 =150.43, p<0.01), particularly in July (F=7.39%; M=1.4%), which comply with the values of the hepatosomatic index (F 2;300 =34.23, p<0.01). Breeding season occurs between July/August and sexual maturity is reached at age of 1. Regarding the feeding regime, 18 taxa were identified from gut content. In the first year of life, the pumpkinseed has a preference for insects and crustaceans. In adult age, gastropods are the preference, which can cause trophic competition with native species. Therefore, monitoring studies should continue to follow the population dynamics.","PeriodicalId":308766,"journal":{"name":"Oceanography & Fisheries Open access Journal","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115384149","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: 3

An Alternative Modeling Approach to Stock Assessment of Central Philippine Waters 菲律宾中部水域鱼类评估的另一种建模方法

Oceanography & Fisheries Open access Journal Pub Date : 2021-06-02 DOI: 10.19080/ofoaj.2021.13.555871

A. Avillanosa

引用次数: 0

The Content of Natural Radionuclides in the Fish of Lake Issyk-Kul 伊塞克库尔湖鱼类中天然放射性核素的含量

Oceanography & Fisheries Open access Journal Pub Date : 2021-05-10 DOI: 10.19080/OFOAJ.2021.13.555867

B. Djenbaev

{"title":"The Content of Natural Radionuclides in the Fish of Lake Issyk-Kul","authors":"B. Djenbaev","doi":"10.19080/OFOAJ.2021.13.555867","DOIUrl":"https://doi.org/10.19080/OFOAJ.2021.13.555867","url":null,"abstract":"This work is devoted to the study of the features of biogenic migration of natural radionuclides in the conditions of Lake Issyk-Kul located in the north-eastern part of Kyrgyzstan. Lake Issyk-Kul is a high-mountainous, thermal, drain less reservoir with brackish water with a high content of natural uranium. This is due to climatic conditions, the geological structure of river valleys, and the peculiarities of the composition of river waters capable of extracting uranium from rocks. Calculations using the Erica tool 1.3 software showed that the natural uranium content in the water of Lake Issyk-Kul (0.809 Bq/l) is safe for living organisms of the aquatic ecosystem, the level of absorbed dose, accumulation and risk factors vary within the normal range. According to the Erica tool 1.3 database, low radiation doses (0-50 μ Gy/h) can stimulate the growth of aquatic plants. The species composition of the ichthyofauna of Lake Issyk-Kul consists of 22 species of fish, including 12 aboriginal and 10 acclimatized. The content of natural radionuclides ( 226 Ra, 228 Th and 212 Pb) in the bone and muscle tissue of some fish species of Lake Issyk-Kul was investigated. It has been established that radionuclides are predominantly found in bone tissue in comparison with muscles, their concentrations vary within the limits of natural parameters.","PeriodicalId":308766,"journal":{"name":"Oceanography & Fisheries Open access Journal","volume":"86 7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113938150","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