The objective of this study was the development of hatching protocols in controlled conditions to obtain juveniles, in order to restock and increase the resource of Sepia officinalis. The study was divided into the following phases: development and application of artificial surfaces at specific sites of the Molise coast in Italy; induction of eggs hatching and juveniles maintenance under contro...

Embryos of three aquatic breeding amphibian species, Ambystoma mexicanum, Hyla chrysoscelis, and Rana clamitans, were exposed to increasing levels (0, 5, 10, 30, 60, 100, 300, and 500 mg/L) of nitrate-N (NO(3)-) in laboratory, static-renewal experiments. Lethal effects were recorded from Gosner stage 2 (H. chrysoscelis and R. clamitans) or Harrison stage 2 (A. mexicanum) to time of hatching. Da...

The fertilized eggs of E. septemfasciatus are spherical and transparent with buoyancy at 790 to 890 μm (average 821.8±2.0 μm) in diameter with 170 to 230 μm oil globules (average 192.9±0.93 μm). Hatching began approximately 46 and 35 hours after fertilization at 22.0°C and 25.0°C water temperature, respectively. The average total length of newly hatched larvae was 1.75±0.03 mm. Most of the yolk...

Fertile White Leghorn chicken eggs were exposed to 0,1,2,4,6,8, and 16 ÎL of Prudhoe Bay Crude oil (PBCO) on day 9 of incubation. The effects of oil on percentage pipping,percentage hatchability, body weight gains post hatching,serum creatine kinase and pathological changes in the pipping (hatching) muscle (musculus complexus), liver, bursa of Fabricius and other organ systems were assessed dur...

In most bird species, the timing of incubation onset may influence the degree of hatching asynchrony, which, together with variation in clutch size, affects reproductive success. In some domesticated species that usually show no hatching asynchrony, plasma prolactin concentrations in females rise with the onset of incubation and the end of laying, and this rise enhances incubation behavior and ...

Sea turtle hatching success at mass nesting beaches is typically lower than at solitary nesting beaches, presumably due in part to high rates of microbial metabolism resulting from the large input of organic matter from turtle eggs. Therefore, we tested the hypothesis that hatching success varies across areas of the beach in conjunction with differences in the physical nest environment andmicro...

background: routine use of assisted hatching (ah) following icsi is a controversial issue in the literature. there are rare studies regarding the effect of laser assisted hatching (lah) on live birth rate. objective: our main goal was to evaluate the effect of lah on delivery rate as well as congenital anomaly in patients undergoing their first icsi cycle. materials and methods: a total of 182 ...

abstract the various stages of embryonic growth pharaoh´s cuttlefish (sepia pharaonis) reside in oman until hatching was studied. gregor tours and the eggs collected for further study of the propagation of education, research center of the earth - chabahar moved .once every 24 hours to get detailed information was sampling of from fertilized eggs. egg size of 11±4 mm were selected because of th...

Substratum quality and oxygen supply to the interstitial zone are crucial for the reproductive success of salmonid fishes. At present, degradation of spawning grounds due to fine sediment deposition and colmation are recognized as main factors for reproductive failure. In addition, changes in water temperatures due to climate change, damming, and cooling water inlets are predicted to reduce hat...