Oceanography & Fisheries Open Access Journal最新文献

筛选

英文中文

The Utility of Dietary Phosphorus Enrichment During Transition to Formulated Feeds of Juvenile Abalone Haliotis tuberculata 结核鲍幼鱼配方饲料过渡阶段饲粮增磷的应用

Oceanography & Fisheries Open Access Journal Pub Date : 2018-10-24 DOI: 10.19080/ofoaj.2018.08.555742

C. Hannon

引用次数: 0

The Effectiveness of Co-Management Practices: The Case of Small-Scale Fisheries in Sri Lanka 共同管理实践的有效性:以斯里兰卡小规模渔业为例

Oceanography & Fisheries Open Access Journal Pub Date : 2018-03-23 DOI: 10.4172/2155-9546.1000509

Vyddiyaratnam Pathmanandakumar

引用次数: 5

Acoustic Systems (Split Beam Echo Sounder) to Determine Abundance of Fish in Marine Fisheries 声学系统(分束回声探测仪)用于确定海洋渔业中鱼类的丰度

Oceanography & Fisheries Open Access Journal Pub Date : 2017-03-01 DOI: 10.24273/JGEET.2017.2.1.38

M. Lubis, H. Manik

{"title":"Acoustic Systems (Split Beam Echo Sounder) to Determine Abundance of Fish in Marine Fisheries","authors":"M. Lubis, H. Manik","doi":"10.24273/JGEET.2017.2.1.38","DOIUrl":"https://doi.org/10.24273/JGEET.2017.2.1.38","url":null,"abstract":"Acoustic waves are transmitted into the subsurface ocean will experience scattering (scattering) caused by marine organisms, material distributed in the ocean, the structure is not homogeneous in seawater, as well as reflections from the surface and the seabed. Estimation of fish stocks in the waters wide as in Indonesia have a lot of them are using the acoustic method. The acoustic method has high speed in predicting the size of fish stocks so as to allow acquiring data in real time, accurate and high speed so as to contribute fairly high for the provision of data and information of fishery resources. Split beam echo sounder comprises two aspects, and a transducer. The first aspect is the high-resolution color display for displaying echogram at some observations and also serves as a controller in the operation of the echo sounder. The second aspect is transceiver consisting of transmitter and receiver. The Echosounder divided beam first inserted into the ES 3800 by SIMRAD beginning of the 1980s and in 1985 was introduced to fishermen in Japan as a tool for catching up. Split beam transducer is divided into four quadrants. Factors that contribute affect the value of Target Strength (TS) fish Strength target can generally be influenced by three factors: a target factor itself, environmental factors, and factors acoustic instrument. Factors include the size of the target, the anatomy of fish, swim bladder, the behavior of orientation.","PeriodicalId":408289,"journal":{"name":"Oceanography & Fisheries Open Access Journal","volume":"18 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132913751","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: 11

首页上一页

Oceanography &amp; Fisheries Open Access Journal最新文献

Oceanography & Fisheries Open Access Journal最新文献