منابع مشابه
Sea-cage Fish Farming and Declines of Wild Fish
It has often been observed that after sea-cage fish farming begins in a coastal area, nearby wild fish populations steadily or precipitously decline due to elevated levels of pathogens and parasites. Such declines can be understood using three methods, in increasing level of mathematical difficulty: (1) an intuitive approach based on the inverse-square law of radiation applied to parasite trans...
متن کاملForaging strategies of deep-sea fish
The structure of the stomach contents of 33 species of fish caught at depths between 400 and 2900 m in the Rockall Trough is analysed for information on foraging strategies of individual species. One representative (a single) or several representatlves (a multiple ~ncidence) of a prey species can occur in stomachs. The contents of stomachs range from 1 to about 200 individual prey ~ t e m s . T...
متن کاملSatellite Fish Forecasting in South China Sea
Fish forecasting technology has been applied successfully in many countries. However, most of the forecasting methods used in temperate water were unsuitable to be applied in this region. A fish forecasting model suitable to tropical environment has to be developed. This major project involving several objectives and phases to meet the goal of developing a satellite-based fishery forecasting sy...
متن کاملPhotosynthesis and fish production in the sea.
Numerous attempts have been made to estimate the production in the sea of fish and other organisms of existing or potential food value to man (1-4). These exercises, for the most part, are based on estimates of primary (photosynthetic) organic production rates in the ocean (5) and various assumed trophic-dynamic relationships between the photosynthetic producers and the organisms of interest to...
متن کاملSurvey of overexploited amount of tuna fish (tuna fish, seer fish and billfish) in Iranian Southern Waters (Persian Gulf and Oman Sea)
Tuna fish from the order Perciform and the scombridae family, with 15 genera and 52 species, it has been an important economic fish for most countries and the most valuable economic aquatic are in industrial catch in the world. The rate of overfishing in the southern waters (from 1997 to 2016) in 2019 was based on CMSY model and R software and Bayesian status approach (Problem solving based on ...
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ژورنال
عنوان ژورنال: Nature
سال: 1891
ISSN: 0028-0836,1476-4687
DOI: 10.1038/045176a0