Aggressiveness and locomotion activity related to hatching time in Matrinxã, Brycon amazonicus (Spix and Agassiz, 1829)

2014 ◽  
Vol 157 ◽  
pp. 146-151 ◽  
Author(s):  
Ellen Cristina M. de Souza ◽  
Jaquelinne P. da Silva ◽  
Marle Angélica Villacorta-Correa ◽  
Thaís B. Carvalho
Keyword(s):  
Hatching Time ◽  
Locomotion Activity

The Relation between the Hatching Time and the Sex-ratio in Japanese Quail

1972 ◽  
Vol 9 (2) ◽  
pp. 102-103
Author(s):  
Kenji Ichinoe ◽  
Osamu Yamamuro ◽  
Shozo Suzuki
Keyword(s):  
Sex Ratio ◽  
Japanese Quail ◽  
Hatching Time

scholarly journals Experiments on skeletal growth and development in vitro in relation to the problem of avian phokomelia

1935 ◽  
Vol 118 (807) ◽  
pp. 133-154 ◽  
Keyword(s):  
Bone Formation ◽  
Bone Growth ◽  
Histological Study ◽  
Detailed Comparison ◽  
Specific Gene ◽  
Body Parts ◽  
Continue Development ◽  
Hatching Time ◽  
Stage Of Development

The experiments to be reported in the following pages were suggested by observations made by one of us on the so-called Creeper fowl. Creeper chickens are characterized by a disproportionate shortness of the long bones of the extremities. Histological study has shown that Creeper chickens belong in the same category as the disproportionate dwarfism of mammals known as chondrodystrophy or achondroplasia (Landauer, 1931) . The Creeper characters are inherited as a Mendelian dominant and are lethal in homozygous condition (Landauer and Dunn, 1930). Homozygous Creeper embryos generally die after about 72 hours of incubation, but in rare cases they survive beyond this stage and continue development up to nearly hatching time. These late stages of homozygous Creeper embryos exhibit striking malformations of the extremities which are known as phokomelia (Landauer, 1933). A study of the early embryonic development of homozygous Creeper embryos (Landauer, 1932) led to the conclusion that the effects of the Creeper mutation are not brought about by specific gene action on those body parts which later show deformities, but by a general retardation of body growth at a definite stage of development. This conclusion was strengthened by a detailed comparison of embryonic and post-natal bone growth in heterozygous Creeper and normal chickens (Landauer, 1934). All evidence which so far has been obtained in this work points to the conclusion that the characteristic traits of heterozygous as well as homozygous Creeper chicks are produced by an unspecific retardation of development at a time when formation of the buds of the extremities (and of the head which in homozygous embryos also shows deformities later on) are proceeding at a particularly rapid rate, thereby causing specific disturbances in the differentiation of these parts. It seemed to us that it should be possible to put these conclusions to an experimental test. The most promising way of approach appeared to be an attempt to produce in vitro the extreme abnormalities of bone formation shown by the extremities of phokomelic homozygous Creeper embryos. These abnormalities chiefly consist in (1) a general retardation of cartilage differentiation; (2) lack of bone formation; and (3) frequent partial fusion of ulna and radius on the one hand, tibia and fibula on the other, or presence of only one bone in these segments instead of two.

scholarly journals Reproductive strategy, egg characteristics and embryonic development of Greenland halibut (Reinhardtius hippoglossoides)

2012 ◽  
Vol 70 (2) ◽  
pp. 342-351 ◽  
Author(s):  
Rosario Domínguez-Petit ◽  
Patrick Ouellet ◽  
Yvan Lambert
Keyword(s):  
Embryonic Development ◽  
Reproductive Strategy ◽  
Biochemical Composition ◽  
Incubation Temperature ◽  
Life Stage ◽  
Early Life Stage ◽  
Greenland Halibut ◽  
Hatching Time ◽  
Greenland Halibut Reinhardtius Hippoglossoides ◽  
Reinhardtius Hippoglossoides

Abstract Domínguez-Petit, R., Ouellet, P., and Lambert, Y. 2013. Reproductive strategy, egg characteristics and embryonic development of Greenland halibut (Reinhardtius hippoglossoides). – ICES Journal of Marine Science, 70: 342–351. Despite the commercial importance of Greenland halibut (GH), important gaps exist in our knowledge of the reproductive and early life stage biology for this species. The present study examined through laboratory experiments the spawning strategy, realized fecundity, egg characteristics, biochemical composition, and embryonic development of GH. The results confirmed the hypothesis that GH is a single-batch spawner producing large eggs, resulting in low realized fecundity. Embryonic development and hatching time are highly dependent on incubation temperature; 50% hatching occurred after 46, 30, and 24 days at 2, 4, and 6°C, respectively. Few changes in the biochemical composition of the eggs are observed during embryonic development. Newly hatched larvae are not well developed, having a large yolk sac, no pigmentation and incomplete development of the jaws. Egg specific density confirmed the mesopelagic distribution of the eggs at sea. However, important buoyancy changes occurring in the last 3–4 days before hatching indicate that larvae hatch higher in the water column. These results are important for understanding advection and dispersion processes of GH eggs and larvae and the connectivity between spawning grounds and nursery areas.

Developmental divergence among hatchery strains of rainbow trout (Salmo gairdneri). I. Pure strains

1985 ◽  
Vol 27 (3) ◽  
pp. 289-297 ◽  
Author(s):  
Moira M. Ferguson ◽  
Roy G. Danzmann ◽  
Fred W. Allendorf
Keyword(s):  
Rainbow Trout ◽  
Morphological Analysis ◽  
Developmental Process ◽  
Developmental Rate ◽  
Electrophoretic Analysis ◽  
Development Rate ◽  
Salmo Gairdneri ◽  
Glucosephosphate Isomerase ◽  
Hatching Time ◽  
Developmental Divergence

We compare the developmental rate of six closely related hatchery strains of rainbow trout. Hatching time, morphological analysis, and the pattern of ontogenetic change in lactate dehydrogenase, malate dehydrogenase, glucosephosphate isomerase, and phosphoglucomutase activities indicate significant differences in developmental rate between strains. There is close concordance among the different measures of developmental rate. Strains with higher levels of heterozygosity, as estimated from electrophoretic analysis of 42 loci, developed faster than less heterozygous strains. The variation in developmental rate in these closely related strains indicates that there is substantial genetic variation affecting the developmental process in rainbow trout.Key words: development rate, intraspecific variation, rainbow trout.

Metabolism of the Black Snake Embryo

1953 ◽  
Vol 30 (4) ◽  
pp. 492-501 ◽  
Author(s):  
HUGH CLARK
Keyword(s):  
Energy Source ◽  
Uric Acid ◽  
Acid Synthesis ◽  
K Value ◽  
Embryonic Tissues ◽  
Hatching Time ◽  
Urea Content ◽  
Foetal Liver ◽  
Liver And Kidney ◽  
Post Deposition

1. Post-deposition growth of the black snake embryo is characterized by k values as follows: days 1-11, 0.46; days 11-34, 0.057; days 34-67, 0.039. 2. Total excreted nitrogen is 12.55 mg. occurring successively in development as ammonia, urea and uric acid; k value of total nitrogen production is 0.062, days 11-67, which in comparison with those of growth during this period suggest that stored protein is an energy source during a large part of development. 3. Urea is excreted into the albumen which is the principal storage reservoir and into the yolk; that which is excreted into the yolk is reabsorbed after the 45th day and re-deposited in the albumen as urea, and is in part (22%) converted to uric acid. 4. Concentration of urea in the yolk and yolk-sac continues to increase at the same rate after the 11th day (k = 0.024), although the actual amount declines after the 45th day; concentration in the embryonic tissues increases to the 58th day, then decreases sharply to hatching time; concentration in the albumen increases throughout development, reaching a concentration of approximately 500 mg.%. 5. Uric acid synthesis is believed to be preceded by urea formation, and the presence of urease in the foetal liver and kidney suggest that the urea is hydrolysed to ammonia which is then incorporated into uric acid. Site of the transformation is uncertain, though the early and persistent localization of uric acid in the chorio-allantoic membrane points to this as the organ of synthesis. Decrease in total urea content is quantitatively identical with increase in uric acid. 6. The significance of these findings in relation to development of the vertebrate cleidoic egg is discussed.

Locomotion Activity Recognition Using Stacked Denoising Autoencoders

2018 ◽  
Vol 5 (3) ◽  
pp. 2085-2093 ◽  
Author(s):  
Fuqiang Gu ◽  
Kourosh Khoshelham ◽  
Shahrokh Valaee ◽  
Jianga Shang ◽  
Rui Zhang
Keyword(s):  
Activity Recognition ◽  
Locomotion Activity

Differences in egg hatching time between cyclical and obligate parthenogenetic lineages of aphids

2017 ◽  
Vol 26 (1) ◽  
pp. 135-141
Author(s):  
Charles-Antoine Dedryver ◽  
Joël Bonhomme ◽  
Jean-François Le Gallic ◽  
Jean-Christophe Simon
Keyword(s):  
Egg Hatching ◽  
Hatching Time

scholarly journals Toxicity of chlordane at early developmental stage of zebrafish

2017 ◽  
Author(s):  
Jingxuan Xiong
Keyword(s):  
Early Stage ◽  
Real Life ◽  
Potential Effect ◽  
Early Developmental Stage ◽  
Dependent Manner ◽  
Lower Survival Rate ◽  
Zebrafish Larvae ◽  
Hatching Time ◽  
Early Developmental ◽  
Dose Dependent

AbstractChlordane is highly toxic organochlorine pesticides that have been widely used throughout the world for decades and posing adverse effects on the environment. Contents detected in tissue and blood samples have resulted in a raising concern for their potential effects on wildlife and humans. In this study, we investigate the potential effect of chlordane on the development of zebrafish embryos. Zebrafish larvae were treated with different concentrations (0, 25, 50, 100, 200 ng/L) of chlordane from 12 hours postfertilization (hpf). Different early stage parameters were observed at 1, 2, 3 and 4 day post-fertilization (dpf). Chlordane-exposed zebrafish larvae appeared significant lower survival rate, developmental and hatching time delay and decreased embryo productivity. The heartbeat rate and blood flow were decreased in a dose dependent manner. These results suggested that exposure to real life of chlordane led to direct morphological and phenotypic changes and effects systems related to development and reproduction even in short-term manner.

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