Male Fish Borrows Egg to Clone Itself

The Scientist – Researchers in Portugal studying a rare type of hybrid fish in the Ocreza River have found an individual that is the exact genomic match to his father. While such androgenesis—the reproduction of a male with no female genetic component—occurs in some non-vertebrates and has been induced in vertebrates artificially, today’s report (May 24) in Royal Society Open Science Read More…

Effective restoration of aquatic ecosystems

Science Daily – Despite having increased human wellbeing in the past, intense modifications by multiple and interacting pressures have degraded ecosystems and the sustainability of their goods and services. For ecosystem restoration to deliver on multiple environmental and societal targets, the process of restoration must be redesigned to create a unified and scale-dependent approach that Read More…

Travel distances of juvenile fish key to better conservation

Phys Org – Marine reserves—sections of the ocean where fishing is prohibited—promote coral reef sustainability by preventing overfishing and increasing fish abundance and diversity. But to be effective, they need to be sized right, and in a way that accounts for how far juvenile fish travel away from their parents after spawning. Scientists at the Woods Hole Oceanographic Institution Read More…

Study Finds Survival Benefits In Waiting A Year Before Releasing…

The Columbia Basin Bulletin – Two-year steelhead smolts released from the Winthrop National Fish Hatchery on the Methow River in central Washington generally had better survival from the tributary into the Columbia River and migrated more rapidly to the Columbia estuary than did one-year smolts. Traditionally, hatcheries release steelhead smolts after just one year of rearing, but Read More…

The Impact of Different Hatchery Rearing Environments on…

Taylor Francis Online – The aim of this study was to assess the effect of differing hatchery rearing environments on smolting, early male maturation, and smolt-to-adult return rates (SARs) in Chinook Salmon Oncorhynchus tshawytscha. In this investigation, SARs were compared for spring Chinook Salmon from Hood River stock reared at three different hatcheries and then released into the Hood Read More…

Reclamation awards four prizes for tall dam fish passage research

Hydroworld – The U.S. Bureau of Reclamation has announced four winners who will split $20,000 in funding for fish passage research. The goal of the program is to identify potential solutions to move juvenile fish downstream past tall dams, ensuring habitat connectivity that USBR says is essential for threatened and endangered populations. The first prize of $10,000 went to Briana Read More…

Fish step up to lead when predators are near

Phys Org – Researchers from the University of Bristol have discovered that some fish within a shoal take on the responsibilities of leader when they are under threat from predators. The findings, reported today in Science Advances and funded by the UK's Natural Environment Research Council, suggest that the majority of decisions made by the leader fish are followed, making the shoals more Read More…

Study Finds Tributary Mouths In Columbia River Impounded Areas May…

The Columbia Basin Bulletin – Some Pacific and Lempetra lamprey move from spawning grounds to the mouths of tributaries in impounded areas of the Columbia River to rear, according to a recent study. Researchers had thought that rearing in tributary mouths was “incidental,” according to one of the researchers, but they found a higher density of larval lamprey in the deep, Read More…

New app big advance in Pacific fish monitoring

RNZ – The environmental group, WWF, says new technology should allow close to real time management of the Pacific's key purse seine tuna fisheries. It says the new 'Observer eReporting App' will change the game for fisheries management. An analysis last year by the Forum Fisheries Agency showed that non-reporting, misreporting or under--reporting were responsible for the bulk of the Read More…

Mini-Magnets: Study Says Fish Homing Skills Based On Iron Possibly…

The Columbia Basin Bulletin – In the spring when water temperatures start to rise, rainbow trout that have spent several years at sea traveling hundreds of miles from home manage to find their way back to the rivers and streams where they were born for spawning. In a study published April 26, 2017 in Biology Letters, researchers have identified genes that enable the fish to perform this Read More…