Brief Study on the Genetic Variations at Isozyme Loci in Native Catfish (<i>Clarias batrachus</i>), African Catfish (<i>Clarias gariepinus</i>) and their Hybrid (<i>Clarias gariepinus</i> x <i>Clarias batrachus</i>)

Both recombinant African catfish LH and FSH are able to activate the African catfish FSH receptor.

LH and FSH are heterodimeric glycoprotein hormones, composed of a common alpha-subunit non-covalently associated with a hormone-specific beta-subunit. Repeated efforts to isolate catfish FSH (cfFSH) have not been successful and only catfish LH (cfLH) has been purified from catfish pituitaries. Recently, however, we succeeded in cloning the cDNA encoding the putative cfFSHbeta; the cDNAs for the...

Production of Hybrid Catfish

ferent species is a process called hybridization,with the offspring known as hybrids. Probably the best recognized animal hybrid is the mule,which is a cross between a female horse and a male donkey. Hybrids can have some characteristics of both parents. Breeding hybrids with selected or favored characteristics of each parent is one of the goals of animal husbandry. When a hybrid has characteri...

Susceptibility of channel catfish, blue catfish and channel×blue catfish hybrid to Ichthyophthirius multifiliis

patterns and variations in native and non-native interlanguage pragmatic rating: effects of rater training, intercultural proficiency, and self-assessment

although there are studies on pragmatic assessment, to date, literature has been almost silent about native and non-native english raters’ criteria for the assessment of efl learners’ pragmatic performance. focusing on this topic, this study pursued four purposes. the first one was to find criteria for rating the speech acts of apology and refusal in l2 by native and non-native english teachers...

leadership styles of tefl instructors at gilan university and their effects on the students attitudes and motivation

the subjects of the study are only the tefl teachers and students at gilan university. to obtain the desired data, a questionnaire which was based on the theories and disecussions gathered, was used as the main data gathering instrument. to determine the degree of relationship between variables, covariance and pearson product moment correlation coefficient were the formulas applied. the data we...