The Northeast Arctic cod (Gadus morhua), is well known for extensive upstream migrations from its feeding grounds in the Barents Sea to various spawning banks along the Norwegian coast. Prior to the 1990s these banks were located on a wide latitudinal range from Finnmark (~71o N) to Møre (~63o N), or even to the south-western parts of Norway (~60o N), with the highest densities around Lofoten (...

Southern bluefin tuna (SBT) appear to comprise a single stock that is assumed to be both mixed across its distribution and having reproductive adults that are obligate, annual spawners. The putative annual migration cycle of mature SBT consists of dispersed foraging at temperate latitudes with migration to a single spawning ground in the tropical eastern Indian Ocean. Spawning migrations have b...

Atlantic bluefin tuna (Thunnus thynnus) are distributed throughout the North Atlantic and are both economically valuable and heavily exploited. The fishery is currently managed as two spawning populations, with the GOM population being severely depleted for over 20 years. In April-August of 2010, the Deepwater Horizon oil spill released approximately 4 million barrels of oil into the GOM, with ...

—Throughout its native range, American shad Alosa sapidissima is thought to cease feeding during anadromous migration. We examined the feeding habits of American shad during spawning migration by documenting changes in diet composition and feeding that occur in mature fish in the York River, Virginia. American shad were collected prior to and after spawning at various locations on a gradient fr...

The species Thunnus thynnus is misspelled in the article title. The correct title is: Trophic Ecology of Atlantic Bluefin Tuna (Thunnus thynnus) Larvae from the Gulf of Mexico and NW Mediterranean Spawning Grounds: A Comparative Stable Isotope Study. The correct citation is: Laiz-Carrión R, Gerard T, Uriarte A, Malca E, Quintanilla JM, Muhling BA, et al. (2015) Trophic Ecology of Atlantic Bluef...

Evolutionary effects of fishing can have unwanted consequences diminishing a fishery's value and sustainability. Reserves, or no-take areas, have been proposed as a management tool for reducing fisheries-induced selection, but their effectiveness for migratory species has remained unexplored. Here we develop an eco-genetic model to predict the effects of marine reserves on fisheries-induced evo...

this study aimed to investigate the spawning season, length at first maturity (lm 50 ) and sex ratio of metapenaeus affinis in the shrimp fishing grounds of hormozgan province, west of the persian gulf, iran. samples were taken by the swept area method and trawl net with 2 cm mesh size in the cod end from january 2010 to february 2011. results showed that the sex ratio deviated from 1:1 and fem...

That iteroparous fish reproduce every year after they have become sexually mature is a common assumption in fisheries science. Experimental and field studies suggest, however, that mature fish commonly skip spawning, often but not only in relation with failing food resources. This study presents a life-history model based on optimal energy allocation for the Northeast Arctic cod. Ingested energ...

Data from plaice, Pleuronectes platessa L., tagged with electronic data storage tags, were used to test whether these fishes exhibited migration route and spawning area fidelity in successive spawning seasons. Depth and temperature data were recorded for each fish over 365-512 days in the central North Sea and this information was used to reconstruct movements based on tidal locations. We disco...

White-streaked grouper (Epinephelus ongus) is an important fisheries target and forms spawning aggregations at particular spawning grounds. The aims of the present study were to investigate the ecological characteristics of annual spawning aggregations such as (1) spatial variations in the density of E. ongus at the spawning ground, (2) the relationship between fish density and environmental va...