نتایج جستجو برای: induced spawning
تعداد نتایج: 985695 فیلتر نتایج به سال:
Life-history theory suggests that animals may skip reproductive events after initial maturation to maximize lifetime fitness. In iteroparous teleosts, verifying past spawning history is particularly difficult; the degree of skipped spawning at the population level therefore remains unknown. We unequivocally show frequent skipped spawning in Northeast Arctic cod (NEAC) in a massive field and lab...
pharaoh cuttlefish (sepia pharaonis) is commercially important and native cephalopods in the persian gulf and oman sea. in 2013, a total of 150 eggs of pharaoh cuttlefish were collected from 20 m depth in about 6 miles south of lengeh port and transferred to the laboratory of mollusks research station in bandar-e lengeh. eggs were incubated in temperature of 27.5±0.5 0c (mean ± sd) and salinity...
Common carp spawning characteristics were compared between season and out-of-season periods. There were no differences in the percentage of ovulation, spermatozoa motility and embryo survival to the eyed-egg-stage between the spawning periods. Fish spawned during the season produced oocytes of higher total weight than those spawned out-of-season. On the day exogenous feeding began, larvae obtai...
Long-term population viability of Fraser River sockeye salmon (Oncorhynchus nerka) is threatened by unusually high levels of mortality as they swim to their spawning areas before they spawn. Functional genomic studies on biopsied gill tissue from tagged wild adults that were tracked through ocean and river environments revealed physiological profiles predictive of successful migration and spawn...
Mangubhai & Harrison (2008; Mar Ecol Prog Ser 360:85–96) documented spawning patterns in an equatorial assemblage of Acropora spp. in Kenya over a 2 yr period. They concluded that reproductive seasons are more protracted at low latitudes and that ‘mass spawning’ does not occur in equatorial regions, due to a breakdown in spawning synchrony among species. However, this interpretation hinges on t...
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 ...
Putative spawning waves of Atlantic herring Clupea harengus were collected from 4 locations and genetically compared using 9 microsatellite loci. Shelf-scale (100s km) spatial differences were measured (max FST = 0.01, p < 0.001) and 1 sub-annual temporal difference (FST = 0.0058, p = 0.001) was revealed between spawning fish (predominantly comprising the same year-class) collected, 6 d apart, ...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید