نتایج جستجو برای: broodstocks
تعداد نتایج: 155 فیلتر نتایج به سال:
The Senegalese sole (Solea senegalensis) is a valuable flatfish for aquaculture, but it presents important reproductive problems in captivity. Spawning is achieved by wild-caught breeders but cultured broodstocks fail to spawn spontaneously and, when they do, eggs are unfertilized. To gain knowledge on the physiological basis underlying this reproductive dysfunction, this study aimed at analyzi...
Blood is directly involved in many metabolic processes, and blood and hormonal assessments can be helpful in diagnosing the physiological status of fish. In this study, changes in stress indices (glucose and cortisol) and steroid hormones (testosterone, estradiol and progesterone) of sea carp broodstocks in three stages, before hormone injection, after injection and after artificial reproducti...
To determine the effects of spawning frequency and density of incubating eggs on the survival rates of eggs and larvae in rainbow trout, five different groups of broodstocks with varying spawning frequencies were stripped. After fertilization, the percentage of survival at different stages of development, from eying, hatching to free swimming fry stages and also growth rates of larvae were dete...
Knowledge on seahorses is generally scarce but has been increasing in recent years due to their conservation status. Seahorse culture is a quite recent activity in the field of marine aquaculture in most countries attempting it, and captive breeding techniques are available only for some species. With the aim of contributing to the development of breeding in captivity for conservative purposes,...
Penaeus vanamei is one of the most important penaeide shrimp species in Persian Gulf. This research was carried out to determine the genetic status of broodstocks of this species by sequencing the cytochrome oxidase I gene (COI). Sampling was performed from two hatcheries in hormozgan province (Kolahi and Tiab) and a hatchery in Bushehr province (Delvar). Seven haplotypes were identified from ...
Primers for eight microsatellites were developed; they successfully amplified DNA from 20 domesticated Formosan Sambar deer (Cervus unicolor swinhoei). All loci were polymorphic, with 10-19 alleles per locus. The average observed heterozygosity across loci and samples was 0.310, ranging from 0 to 0.750 at each locus. All loci but one, CU18, deviated from Hardy-Weinberg equilibrium due to excess...
background: there are different activating salt solutions for sperm induction of rainbow trout (oncorhynchus mykiss) under artificial spawning condition, although some uncertainties are associated with the performance. objectives: this study was conducted to consider the effects of different concentration of calcium and magnesium ions and change of ph in the billard salt solution on sperm motil...
Hatchery production of Chinook Salmon Oncorhynchus tshawytscha in the Columbia River basin comprises most anadromous salmonid this region. facilities and programs serve to mitigate for impacts salmonids due construction operation hydropower dams habitat from development addition conservation restoration natural populations. A genetic method referred as parentage-based tagging (PBT) enables high...
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