Search results for "Fish"
showing 10 items of 3164 documents
Some observations on the metabolism of S35-methionine during development of the sea urchin eggs
1958
Si e studiato il metabolismo della metionina-S35 nella frazione non-proteica (TCA-solubile) nel corso dello sviluppo diParacentrotus lividus.
Quinol sulphate, a new conjugate of phenol in goldfish.
1983
1. Metabolism of phenol in goldfish yielded the known phenyl conjugates in fish--phenyl sulphate and phenyl glucuronide. Additionally, quinol sulphate, a new conjugate of phenol in fish, was detected.
The activity of glutathione S-transferase in hepatopancreas of Procambarus clarkii: Seasonal variations and the influence of environmental pollutants
1991
Abstract 1. 1The glutathione S -transferase activity in hepatopancreas of the American red crayfish Procambarus clarkii after 15 days' acclimatization in tap water aquaria was measured in specimens collected monthly for a whole year, and shows seasonal variation. 2. 2. Previous data on the environmental pollution of Lake Albufera suggest a possible correlation with the activity tested in the different seasons of the year considering the results of non-acclimatized animals.
Cadmium induced metallothionein in hepatopancreas of Procambarus clarkii: Quantification by a silver-saturation method
1993
Abstract 1. Cadmium induced metallothionein (MT) in crayfish hepatopancreas was measured by silver-saturation method. 2. An increase in MT content was recorded in crayfish hepatopancreas after 12 hr of exposure to 10 mg Cd/l. 3. There was found to be a linear relationship between MT concentrations in hepatopancreas and cadmium concentration in the water. 4. MT levels in hepatopancreas of 20 mg Cd/l exposed crayfish were 7-fold higher than those in control animals.
The effect of time, concentration and temperature on bioaccumulation in the gill of crayfish procambarus clarkii induced by organochlorine pesticides…
1993
Abstract 1. Crayfish were exposed to 1 25 th 96-hr lc 50 and 96-hr lc 50 of lindane and endosulfan for 1, 24, 48, 72 and 96 hr. 2. Concentrations of lindane and endosulfan were determined in gill tissue at 22°C and 29°C. 3. Clear differences were found in all concentrations, times and temperatures tested in gill tissues. 4. The highest accumulation of pesticide was found in the lc 50 endosulfan value.
A method for the incorporation of radioactive isotopes in the sea urchin egg.
1957
Con la iniezione di 10–20µc di Metionina-S35 nella cavita celomatica di femmine adulte diParacentrotus lividus si ottiene una rapida ed efficiente incorporazione dell'isotopo nelle uova. Si discutono i vantaggi del metodo rispetto a quello attualmente in uso.
Toxicokinetics of xenobiotics in zebrafish—Comparison between tap and river water
1991
Abstract 1. 1. Uptake and elimination of lindane, 3,4-dichloroaniline, phenol and 4-nitrophenol by the zebrafish Brachydanio rerio were investigated in tap water and in water of the river Rhine. 2. 2. The differences in bioconcentration of chemicals between the two water types did not exceed a factor of 2.5. 3. 3. Elimination kinetics were comparable in tap and river water. 4. 4. It can be concluded that water of the river Rhine does not influence the kinetics of the investigated xenobiotics.
Data for: Genetic homogeneity in the deep-sea grenadier Macrourus berglax across the North Atlantic Ocean
2018
Microsatellite alleles in Genepop format. DNA sequences in fasta format with correspondent geographical coordinates.
Growth Aspects of Scad Decapterus macrosoma on Fish Point Sanggeng-Manokwari Regency
2018
Tujuan dari penelitian ini adalah untuk mengetahui aspek pertumbuhan ikan meliputi: distribusi ukuran, hubungan panjang-berat, faktor kondisi dan model pertumbuhan. Penelitian ini dilaksanakan pada bulan Maret sampai dengan bulan Juni 2015. Metode yang digunakan adalah metode deskriptif dengan teknik observasi. Jumlah ikan layang yang didapatkan sebanyak 500 ekor. Sebaran ukuran panjang yang diperoleh untuk individu jantan 109-303 mm dan 125-299 mm untuk individu betina. Berdasarkan hasil analisis korelasi antara panjang dan berat ikan layang seluruhnya positif dan sangat kuat, ikan betina memiliki nilai koefisien korelasin 0,6184 dengan koefisien determinasi (R2) 0,3824 dan ikan jantan 0,5…
Wavelength dependence of visual acuity in goldfish.
2003
Visual acuity was measured in a two-choice training experiment with food reward. Four goldfish were trained to select a homogeneously illuminated testfield when a high-contrast grating (transparency) was shown for comparison at the second testfield. Measurements were performed for white and monochromatic testfield illuminations in the light adapted state. Fourteen wavelengths between 404 nm and 683 nm were tested. For each wavelength (and white light) the testfield intensity was determined for which spatial resolution was highest. Between 446 nm and 683 nm maximal values of 2.0 cycles/deg (corresponding to a visual acuity of 15' of arc) were found. At 404 nm and in the ultraviolet resolutio…