| multiple molecular forms of gonadotropin-releasing hormone in teleost fish brain. | gonadotropin-releasing hormone (gnrh) immunoreactive peptides in extracts of hake (merluccius capensis) and tilapia (tilapia sparrmanii) brain were investigated by high performance liquid chromatography (hplc) and radioimmunoassay with region-specific antisera. in hake brain, content and concentration of gnrh was higher in the pituitary gland than in the hypothalamic lobes or extrahypothalamic brain. hake pituitary gland gnrh was purified by six consecutive hplc systems. the major gnrh molecular ... | 1985 | 3906593 |
| parasites of merluccius capensis and m. paradoxus from the coast of namibia. | 84 specimens of the sea hake merluccius capensis and 60 of m. paradoxus were investigated parasitologically along the coast of namibia in 1988. between both fish species there was a high coincidence. 18 species of parasites could be stated. distinction is remarkable between the north and south parts of the investigation area with a boundary at about 25 degrees 30' south. southern to this border line of probably different fish stocks brachiella merluccii is absent and the prevalence of scolex ple ... | 1993 | 8334458 |
| genetic identification of nine hake species for detection of commercial fraud. | this study describes the 5s rrna gene as a simple and reliable one-step pcr-based genetic marker that allows unambiguous identification of merluccius paradoxus, merluccius senegalensis, merluccius australis, merluccius gayi, merluccius bilinearis, merluccius hubbsi, and macruronus magellanicus. the marker is based on differences in length at the nontranscribed spacer within the 5s rrna genes and is robust enough for identification of processed products, such as fish fingers and other precooked c ... | 2004 | 15633688 |
| genomic and phylogenetic characterization of luminous bacteria symbiotic with the deep-sea fish chlorophthalmus albatrossis (aulopiformes: chlorophthalmidae). | bacteria forming light-organ symbiosis with deep-sea chlorophthalmid fishes (aulopiformes: chlorophthalmidae) are considered to belong to the species photobacterium phosphoreum. the identification of these bacteria as p. phosphoreum, however, was based exclusively on phenotypic traits, which may not discriminate between phenetically similar but evolutionarily distinct luminous bacteria. therefore, to test the species identification of chlorophthalmid symbionts, we carried out a genomotypic (repe ... | 2005 | 15691950 |
| myosporidium merluccius n. g., n. sp. infecting muscle of commercial hake (merluccius sp.) from fisheries near namibia. | a new species of microsporidia classified to a new genus was observed in the trunk muscle of commercial hake (merluccius capensis/paradoxus complex) from namibian fisheries. macroscopic examination revealed thin and dark filaments inserted among muscle fibers. inside the filaments were many sporophorous vesicles with about 30-50 spores per vesicle. the shape of the spore was pyriform and the extruded polar filament was of moderate length (up to 4.29 microm, n=12). this new species of microsporid ... | 2005 | 16313438 |
| mitochondrial dna analyses of the cape hakes reveal an expanding, panmictic population for merluccius capensis and population structuring for mature fish in merluccius paradoxus. | the cape hake species, merluccius capensis and merluccius paradoxus are the most important resource of the south african and namibian demersal fishery, but it is unclear whether there is a single population of each shared by both countries. we analysed the population structure and evolutionary history of these two species using the variable 5' region of the mtdna control region for 311 specimens of m. capensis and 333 specimens of m. paradoxus sampled between lüderitz (southern namibia) to south ... | 2007 | 16982203 |
| biannual otolith-zone formation of young shallow-water hake merluccius capensis in the northern benguela: age verification using otoliths sampled by a top predator. | otoliths collected at least monthly from scat samples of cape fur seals arctocephalus pusillus are used to show that shallow-water hake merluccius capensis from the northern benguela develop three translucent zones in their first 1·5 years of life. the novel sampling approach provided otoliths that belonged to four m. capensis cohorts of approximate known age (hatched in 1996, 1998, 2002 and 2005), allowing age verification. following spawning in austral winter, translucent zones consistently fo ... | 2015 | 25990746 |