Articles tagged with Fisheries
The Egyptian Mediterranean Sea fishery has recovered due to increased phosphorus and nitrogen in urban waste water, changing the ecosystem's productive engine. This shift has important consequences for lower food web structure and larval fish.
Indonesia aims to create 5 million hectares of new marine protected areas, with the help of $1 million investment from Conservation International's Global Conservation Fund. The move is part of efforts to reverse ocean decline and promote sustainable development.
Scientists warn that leatherback sea turtles are on the brink of extinction due to declining populations in Pacific Ocean rookeries. Conservation efforts are needed to reverse this trend, with potential solutions including gear fixes, spatial closures, and changes in consumer demand for swordfish.
The Pacific Ocean's sardine and anchovy regimes alternate every 25 years, affecting the marine food web and climate. These cycles are similar to El Niño events but take place over longer time periods.
Research suggests hatchery steelhead do not harm wild steelhead, but may jeopardize wild chinook survival rates. Studies reveal a strong negative association between hatchery steelhead and wild chinook smolt-to-adult survival.
Researchers created a DNA fin test that accurately identifies six shark species commonly caught in North Atlantic waters. The test uses polymerase chain reaction and has implications for shark fisheries and trade monitoring, facilitating better recordkeeping and conservation efforts.
Researchers have developed a new genetic shark-identification test that is quick, accurate and relatively cheap. The test has been evaluated on 33 closely-related known species and found to be nearly 100% accurate, with an average accuracy of over 99%, according to Shivji and his colleagues.
A recent review article reveals that horseshoe crabs have an impressive survival rate of 7.5% after undergoing biomedical bleeding, suggesting their 350 million-year-long survival is remarkable. The research also provides new information on the habitat, migration patterns, and nursery grounds of horseshoe crabs.
Researchers have discovered a new method to isolate and understand the chemicals released by male sea lampreys to lure females. The study reveals that males release pheromones, not females, to initiate mating, offering potential new strategies for controlling sea lamprey populations.
A recent study by Tsou and Collie found that predation is a dominant source of mortality in the Georges Bank fish community. The most important predators are cod, silver hake, sharks, and rays, which have replaced groundfish as the dominant fish eaters in more recent years.
Researchers at PNNL and the US Army Corps of Engineers used an acoustic camera to study fish behavior near a dam, capturing images of individual fish at distances of up to 30 feet. The camera provided detailed information on fish size and shape estimates, expanding understanding of how fish react to structures added to dams.
Scientists from over 20 nations will gather to discuss the processes and interactions that determine fish population production. The symposium explores topics such as overfishing, environmental factors, and recruitment dynamics to better understand the global fisheries crisis.
A new net design reduces bycatch of juvenile pollock in the US fishery by up to 75%. Researchers have found that modifying mid-water trawls to use single top-panels of mesh allows small pollock to escape, while retaining market-sized fish. This simple and effective technique could greatly enhance the survival and health of the resource.