OUT-OF-SEASON SPAWNING OF THREATENED WEATHERFISH MISGURNUS FOSSILIS (L. 1758) USING COMMERCIAL PREPARATIONS CONTAINING GnRH ANALOGUES

The differentiation capacity of isolated loach (Misgurnus fossilis L.) blastoderm.

Experiments on the capacity of the isolated teleost blastoderm to undergo development when cultivated in vitro have revealed species differences in the time of initiation of blastoderm differentiation. Thus the Fundulus blastoderm acquires the ability to develop after being separated from the yolk at the stage of 32 blastomeres (Oppenheimer, 1936) while the blastoderms of pike and of salmon dif...

Reproductive parameters of common carp (Cyprinus carpio L) spawners during natural season and out-of-season spawning.

Common carp spawning characteristics were compared between season and out-of-season periods. There were no differences in the percentage of ovulation, spermatozoa motility and embryo survival to the eyed-egg-stage between the spawning periods. Fish spawned during the season produced oocytes of higher total weight than those spawned out-of-season. On the day exogenous feeding began, larvae obtai...

The Spawning of Arenicola Marina ( L ) . I . the Breeding Season

assessment of the efficiency of s.p.g.c refineries using network dea

data envelopment analysis (dea) is a powerful tool for measuring relative efficiency of organizational units referred to as decision making units (dmus). in most cases dmus have network structures with internal linking activities. traditional dea models, however, consider dmus as black boxes with no regard to their linking activities and therefore do not provide decision makers with the reasons...

Contamination of Commercial L-leucine Preparations with Methionine and Cystine.

methods to remove methionine from L-leucine (Fox, Science 84:163, 1936; Bergmann and Stein, J. Biol. Chem. 129:609, 1939), I was surprised to find that certain current preparations of commercial L-leucine, supposedly of high quality, are heavily contaminated with methionine and also with cystine. In an examination of the requirements of a series of Bacillus subtilis mutants, the four types show...