of a particular stock is permitted. These principles are grounded in natural history realities and include: (1) protection of spawning animals and substocks; (2) protection of juveniles from bycatch and habitat degradation; (3) conservation of forage species that support growth and survival of desired predator stocks; and (4) protection of species that appear to structure the ecosystem in which the stock evolved (i.e., keystone species). General principles such as these are critical to the development of true ecosystem-based management and a course of action that favours restoration, conservation, and fishery production. To meet these objectives, this paper advocates measures such as the implementation of temporal marine reserves, gear restrictions, and highly conservative quotas of forage species complexes. This paper also advocates the use of local management paradigms that incorporate the local ecological knowledge of experienced fishermen.
A Geographical Information System for 4D Marine Datasets.
1 & Valavanis V1
1Hellenic Center for Marine Research, 71003 Heraklion, Crete, Greece
In many disciplines, large data collections are increasingly emerging as one of the most important resources. In domains as diverse as global climate change, high energy physics and computational genomics, the data volume already reaches terabytes and will soon approach petabytes. This is the case in marine sciences. The accumulated large amount of marine datasets, coming from diverse sources such as remote sensing or electronic sensors, must be efficiently stored to be queried by marine scientists according to specific criteria (e.g. where are areas that simultaneously have a temperature between 10 and 15ºC, salinity greater than 35 psu and chlorophyll greater than 0.003 mg/m3?) and display these queries in 3D graphics. We present a distributed and scalable GIS-like tool for the storage, selection and visualization of 4D marine datasets. The aim of this tool is to standardize the variety of data available for the water column and support marine biologists in manipulating 4D marine datasets. It enables answering specific environmental and biological questions regarding ocean processes and essential fish habitat mapping in three dimensions over time.