Organisms into which heterologous DNA (transgene) has been artificially introduced and integrated in their genomes are called transgenics. Since the mid 1980s, many species of transgenic fish have been produced by introducing desired foreign DNA into unfertilized or newly fertilized eggs by microinjection or electro-poration. More recently, transgenic finfish, shellfish, and crustaceans have al...

An interlaboratory study was conducted to validate a gas chromatographic (GC) method for determination of 21 organochlorine pesticides, 6 pyrethroid pesticides, and 7 polychlorobiphenyl (PCB) congeners in milk, beef fat, fish, and eggs. The method was performed at low contamination levels, which represent relevant contents in food, and is an extension of the European standard (method NF-EN-1528...

1. In a laboratory batch culture experiment, a diapause response of Daphnia magna to a simulated threat of fish predation was tested at various light intensities, which under natural conditions determine potential vulnerability of Daphnia to visual planktivorous fish. 2. Under moderate light intensity (1.4 lmol m s) that allows effective predation by fish, the proportion of females producing do...

Fecundity, length at first spawning, and spawning seasonality of Stolephorus purpureus were dete~minedby examining preserved ovarian eggs and fish captured throughout a 4-year period. Fecundity was estimated from the numbel of eggs in the most advanced ovarian mode after it was determined that all these eggs hydrated and were spawned. Fecundity (Y) was related to fish weight (X) by the hyperbol...

The reproductive strategies of Cichlids: Hemichromis fasciatus, Oreochromis niloticus, Sarotherodon galilaeus and Tilapia zillii was studied from June, 2007 to December, 2008. The variability in egg –size (i.e. diameter) were measured using the micrometer eye-piece in a binocular microscope. Fecundity was estimated by direct enumeration and related to the fish species population. The sex ratio ...

In order to protect the diverse ecosystems of coastal California, a series of marine protected areas (MPAs) have been established. The ability of these MPAs to preserve and potentially enhance marine resources can only be assessed if these habitats are monitored through time. This study establishes a baseline for monitoring the spawning activity of fish in the MPAs adjacent to Scripps Instituti...

Quail eggs comprise a significant and favourable part of table eggs in certain countries. Some quail eggs, however, present fishy off-flavor which directly influences their quality. It is reported that flavin-containing monooxygenase 3 (FMO3) is associated with fish-odour trait in human and animal products. FMO3 is responsible for the degradation of trimethylamine (TMA) in vivo. Loss-of-functio...

Abstract Melanotaenia ajamaruensis with the common name Ajamaru Rainbowfish belongs to group that endemic of Lake Papua, Indonesia. These fish are very potential as ornamental fish, but biological information is rare. The has just domesticated, therefore a research inceased reproductive factors in captivity needed. reproduction ability was conducted by using various levels Spirulina feed (A=0; ...

Malachite green has been used as an effective compound to control external fungal and protozoan infections of fish since 1933 but it has never been registered as a veterinary drug for use in food fish because of its potential carcinogenicity, mutagenicity and teratogenicity in mammals. The present paper reviews negative sideeffects of malachite green including its accumulation and persistence i...