نتایج جستجو برای: fish reproduction
تعداد نتایج: 168650 فیلتر نتایج به سال:
Cobitis faridpaki Cobitis faridpaki (Mousavi-Sabet, Vasil'eva, Vatandoust and Vasil'ev, 2011) is found in streams of the Siahrud River in the southeastern Caspian Sea basin, and this is the first report on reproductive parameters of the newly described endemic loach. Reproductive conditions are key parameters of fish populations, and their assessment is very important for endemic fishes. To stu...
The rapid development of fish farming and the increasing demand for fish have led to the dense cultivation of fish, which in turn has caused stressors for fish and thus increased the risk of disease. until now, the use of chemicals has been widely used for prevention and treatment, however, the use of chemical drugs has several negative effects on the environment (creation of resistant strains ...
Abstract As in other vertebrates, fish reproduction is tightly controlled by gonadotropin signaling. One of the most perplexing aspects action on germ cell biology restricted expression receptors somatic cells gonads. Therefore, identification factors conveying gonadotropins particularly important for understanding mechanism reproduction. Insulin-like growth (Igfs) are recognized as key regulat...
The ultraviolet (UV) filter 3-benzylidene camphor (3BC) is used in personal care products and in a number of materials for UV protection. 3BC has been shown in vitro and in vivo in fish to be estrogenic, but possible effects on fertility and reproduction are unknown. In this study we evaluate whether 3BC affects reproduction of fish Pimephales promelas. After a preexposure period of 21 days, re...
Big eye snapper is one of the important species of snappers from (Lutjanidae) family. This fish is resident of Persian Gulf and Oman Sea and is edible. Study reproduction in Lujanus lutjanus was conducted in the Persian Gulf and Sea of Oman from December 2014 to November 2015. Sampling was conducted at 14 stations using trawl and trap monthly. In this study, the total number of samples was 247,...
Over the last century the reproduction of sturgeon has been intensively studied par Russian scientists who established a technology for the ranching of alevins which included artificial fertilization of gametes taken from wild broodfish and larvae rearing. More recently, since 1970, major contributions originated from teams in the USA, the EU, Japan and Iran. A rather good knowledge of the repr...
Over the last century the reproduction of sturgeon has been intensively studied par Russian scientists who established a technology for the ranching of alevins which included artificial fertilization of gametes taken from wild broodfish and larvae rearing. More recently, since 1970, major contributions originated from teams in the USA, the EU, Japan and Iran. A rather good knowledge of the repr...
Aquaculture is one of the fastest rising sectors of world food production. Hundreds of fish species are cultured, providing an affordable, high quality food source. Two aspects of sexual development are critically important for the continued improvement of cultured fish stocks: sexual dimorphism and control of reproduction. In this paper, we review the main methods used to control sex determina...
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