Sentences with phrase «total fish catch»

Since phytoplankton form the base of marine food webs, the world's most productive fisheries are located in areas of coastal upwelling that bring cold nutrient rich waters to the surface (especially in the eastern boundary regions of the subtropical gyres); about half the world's total fish catch comes from upwelling zones.

Not exact matches

For example, intensive studies of the effect of fish catch on yield led to the conclusion in the early 1970s that the total global fish yield could be sustained at around 100 million tons a year.

This includes open dumps (i.e., uncovered, unlined), open burn (i.e., not in a controlled facility), the portion of harvested crops eaten by pests, and fish discards (the portion of total catch that is thrown away or slipped)

Because the catch of fish in these areas was lower, such measures would protect many species but wouldn't cut into the total catch as deeply, the authors argue in their report, published online this week in the Proceedings of the National Academy of Sciences.

To derive the death toll worldwide, Read and his team calculated the ratio of cetacean bycatch to total U.S. fish catches and applied it to global catches.

«By looking at the decline in fish food over time, we can estimate how much our total potential fisheries catch could be reduced,» said Moore, who helped develop the Community Earth System Model employed in this study.

Last September he and his colleagues reported that when governments, instead of merely trying to limit the total catch in a fishery, assign individual fishermen a specific share of it, the fishermen stop racing each other to catch as many fish as possible.

It wants the total allowable catch reduced to a level providing an 80 % probability of stocks recovering and demands other steps to reduce fishing pressure.

The amount of total fat and omega - 3 fatty acids found in different species of fish and shellfish can vary depending on a number of factors including the diet of each species, the season and location of the catch, the age and physiological status of the individual organism, and reproductive cycles.

26 of the total 72 Fish can be caught in your town in February.

(4) Fishing with Anotonio's boat and catching mahi - mahi, wahoo, tuna, yellow tail, and others - about 15 fish total!

To get to this number, Jacquet reconstructed Ecuador's shark landings, relying on shark fin export data and other reports, the part of the fish catch that is brought onshore (which often provides the only record of total catch), from 1976 to 2004.

It makes the total area five times larger than the existing national park, and will include a fully protected no - fishing zone along with limited catch zones.