نتایج جستجو برای: fishing operations

تعداد نتایج: 149015  

2008
Bryan P. Wallace Selina S. Heppell Rebecca L. Lewison Shaleyla Kelez Larry B. Crowder

1. Fisheries bycatch has been implicated in declines of many long-lived marine vertebrate populations, but bycatch impacts on these populations vary according to spatio-temporal overlap in fisheries operations and critical ontogenetic habitat, as well as to characteristics of fishing gear. 2. To provide a framework for comparing the relative impacts of different fisheries on populations of logg...

2018
Jennifer C Selgrath Sarah E Gergel Amanda C J Vincent

Locally sustainable resource extraction activities, at times, transform into ecologically detrimental enterprises. Understanding such transitions is a primary challenge for conservation and management of many ecosystems. In marine systems, over-exploitation of small-scale fisheries creates problems such as reduced biodiversity and lower catches. However, long-term documentation of how governanc...

This paper used the Data Envelopment Analysis (DEA) to measure the technical efficiency of fishing vessels in Haizhou Bay, and then used the Tobit regression to define its influencing factors. This study shows that the overall fishing capacity utilization of fishing vessels at present is very low which indicates that there is a serious waste of resources problem in Haizhou Bay. Specifically, th...

2007
Kiyoshi AMAGAI Rihei KAWASHIMA

Dynamical relation between ship's motions and warp tension while towing a trawl net was identified by the use of statistical method to be the multivariate AR model. Using this system identification method, the various towing system parameters were obtained by analysing the records of measuring ship's motions and warp tension during the fishing operations in several sea conditions. Based on thes...

2007
P. Kilby

The Royal Australian Air Force (RAAF) conducts maritime surveillance operations in order to deter non-state threats such as terrorism or illegal fishing. RAAF aircraft search various areas of ocean in order to classify as many ships as possible in the shortest possible time. This resembles the traditional Travelling Salesman Problem (TSP) but with many interesting variations – the “cities” (shi...

Journal: :بهره برداری و پرورش آبزیان 0
افشین عادلی دانشگاه گرگان ارغوان معماری -

abstract nowadays, the management of water resources by planning through appropriate site selection, fish species storage and selection, enforcement and providing various side services has become a profitable, entrepreneurial and fun process. survey and usage of development of fee-fishing experience in the world wide represent a model in order to a better economical and fun plan offers and envi...

2016
João C. Ferreira Serge Lage Iola Pinto Nuno Antunes

— This paper discusses the results of an applied research on the fishing activity based on a monitor system developed by a company and fishing reports produced at the end of each fishing activity. Due to economic interests combined with fishing limitations there is a natural tendency for wrong reporting. We apply Data Mining (DM) methodologies to find fishing patterns. These DM techniques in SQ...

S. Zhaoqun, W. Rong, Z. Yugui,

This paper used Data Envelopment Analysis (DEA) to measure the technical efficiency of fishing vessels in Haizhou Bay, and then used the Tobit regression to define its influencing factors. This study shows that the overall fishing capacity utilization of fishing vessels at present is very low which indicates that there is a serious problem of waste of resources in Haizhou Bay. Specifically, the...

2012
Nancy Young

SUMMARY: We, NMFS, issue the final False Killer Whale Take Reduction Plan (FKWTRP), and regulatory measures and non-regulatory measures and recommendations to reduce mortalities and serious injuries of false killer whales in Hawaii-based longline fisheries. Regulatory measures include gear requirements, longline prohibited areas, training and certification in marine mammal handling and release,...

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