The notostracan tadpole shrimp (TPS) Triops newberryi Packard has potential to be used as a biocontrol agent of immature mosquitoes. Eggs, nymphal or adult shrimps are considered to be the stages for field introduction. To yield good growth of the shrimp and high production of shrimp eggs under artificial conditions, nutritional requirements of TPS for growth, survival and fecundity need to be ...

A fourfold increase in oxygen uptake by rabbit spermatozoa incubated in the rabbit uterus and a twofold increase in cock sperm¬ atozoa incubated in the hen's oviduct over ejaculated spermatozoa is the first reproducible biochemical change to be demonstrated in sperma¬ tozoa residing in the female genital tract. It was shown that these rapidly respiring spermatozoa were capacitated because they ...

To safeguard against meat supply shortages during pandemics or other catastrophes, this study analyzed the potential to provide average household’s entire protein consumption using either soybean production distributed at household level in U.S. with: (1) pasture-fed rabbits, (2) pellet and hay-fed (3) pellet-fed chickens. Only backyard resources, cultivation can 80–160% of 0–50% a needs be pro...

INTER-SPECIFIC transplantations of mammalian eggs offer one possible way of studying the significance of intrinsic and external factors in embryonic development and their mutual interactions. The variety of problems which can be attacked by this method is dependent, of course, on the length of time during which development can proceed with a given combination of donor and recipient. The develop...

After microinjection of hemoglobin mRNA from rabbit reticulocytes (9S mRNA) into Xenopus laevis oocytes, the cytological structure remains normal. The peroxidase reaction does not show an accumulation of synthesized hemoglobin in the germinal vesicle. Fertilized Pleurodeles Waltlii eggs synthesize rabbit hemoglobin after injection of 9S mRNA; hemoglobin synthesis decreases as development progre...