scholarly journals PRECOCIOUS MATURITY OF THE MAJID CRAB,PUGETTIA PRODUCTA, PARASITIZED BY THE RHIZOCEPHALAN BARNACLE,HETEROSACCUS CALIFORNICUS

1984 ◽  
Vol 166 (2) ◽  
pp. 384-395 ◽  
Author(s):  
JACK O'BRIEN
Keyword(s):  
Precocious Maturity

Reproduction Versus Somatic Growth: Hormonal Control in Octopus Vulgaris

1978 ◽  
Vol 77 (1) ◽  
pp. 15-31 ◽  
Author(s):  
R. K. O'DOR ◽  
M. J. WELLS
Keyword(s):  
Amino Acids ◽  
Free Amino Acids ◽  
Free Amino ◽  
Muscle Protein ◽  
Somatic Growth ◽  
Hormonal Control ◽  
Gland Secretion ◽  
Total Amino Acid ◽  
Octopus Vulgaris ◽  
Precocious Maturity

Octopus vulgaris can be forced into precocious maturity by removal of the subpedunculate lobe from the brain, an operation that releases the optic glands from inhibition, and allows them to secrete a gonadotropin. 14C-leucine was injected into the bloodstream of immature animals and its subsequent incorporation into muscle protein followed by taking successive samples from the arms. The optic glands were then activated, and a further injection of 3H-leucine given and followed by means of further arm samples. Optic gland secretion suppresses protein synthesis in the muscles. This is associated with an increase in the total amino acid pool in the muscles and with a considerable increase in the concentration of free amino acids circulating in the blood. If an ovary is present these events are associated with a rapid growth of the ovary and its ducts, and a loss of weight elsewhere. In ovariectomized animals the ducts grow, but there is no yolk to absorb the large pool of free amino acids, and the animals gain weight by osmotic uptake of water into the muscles. The developing ovary may produce a hormone that increases the release of amino acids from muscle, since the concentration circulating in the blood of intact animals remains at least as high as in ovariectomized octopuses, despite the demands of the developing ovary. These matters are discussed in relation to other evidence for a gonadial hormone and in relation to the ‘self-destruct’ effect of the optic gland secretion in determining the post-reproductive death of octopuses.

scholarly journals A Case of Precocious Maturity

1897 ◽  
Vol 136 (10) ◽  
pp. 231-232
Author(s):  
CHARLES W. TOWNSEND
Keyword(s):  
Precocious Maturity

scholarly journals Growth rates of main and reciprocal crosses of Isa Brown and local chickens

2020 ◽  
Vol 46 (2) ◽  
pp. 1-7
Author(s):  
U. C. Nwaogwugwu ◽  
U. H. Udoh
Keyword(s):  
Growth Rates ◽  
Broiler Chicks ◽  
F1 Hybrid ◽  
Naked Neck ◽  
Reciprocal Crosses ◽  
Fast Growing ◽  
Instantaneous Growth ◽  
Precocious Maturity ◽  
Absolute Growth ◽  
Local Chickens

The absolute and relative instantaneous growth rates of F1 hybrid chickens were determined  at 2- 10 and 12-20 week periods of growth. The hybrids were hatched from eggs laid by 69 Isa Brown and local chicken parents. A total of 123, 49 and 116 chicks of Isa Brown x frizzle feathered (IBxF), Isa Brown x naked neck (IBxNa) and Isa Brown x normal feathered IBxN) main crosses and 137, 42 and 64 chicks of frizzle feathered x Isa Brown (FxIB), naked neck x Isa Brown (Na x IB) and normal feathered x Isa Brown (NxIB) reciprocal crosses, respectively were produced at day-old. The greatest absolute growth rates of 49.44g/week at 2-10 weeks and 71.11 g/week at 12-20 weeks were obtained from IBxN and FxIB genotypes, respectively. Instantaneously, IBxNa had the greatest rate of 0.28 g/time at 2-10 weeks, while IB x F and Na x IB each at 12-20 weeks were found to grow at the greatest rate of 0.091 g/time, respectively. It was concluded that normal and naked neck genes could be utilised in main crosses to develop fast growing broiler chicks while frizzle and naked neck genes could be used in reciprocal crosses to improve good laying pullets without precocious maturity.

On Genital Maturity in an Immature Soma

1930 ◽  
Vol 7 (3) ◽  
pp. 248-252
Author(s):  
L. MIRSKAYA ◽  
F. A. E. CREW
Keyword(s):  
Pregnant Woman ◽  
Female Mouse ◽  
Sexual System ◽  
Immature Female ◽  
Precocious Maturity

The precocious maturity of the sexual system of the immature female mouse provoked by the injection of urine from the pregnant woman is not associated with any maturation of the organism as a whole, for coitus in the case of such animals is never followed by pregnancy. The age at which the first litter is produced is undisturbed by this procedure.

Cardiac CT Imaging: Precocious Maturity?

2012 ◽  
Vol 30 (1) ◽  
pp. xiii
Author(s):  
Stephan Achenbach ◽  
Takeshi Kondo ◽  
Jagat Narula
Keyword(s):  
Cardiac Ct ◽  
Ct Imaging ◽  
Precocious Maturity

Reduced daylength stimulates size-dependent precocious maturity in 0+ male Atlantic salmon parr

Aquaculture ◽  
2011 ◽  
Vol 311 (1-4) ◽  
pp. 168-174 ◽  
Author(s):  
Ove T. Skilbrei ◽  
Mikko Heino
Keyword(s):  
Atlantic Salmon ◽  
Size Dependent ◽  
Precocious Maturity ◽  
Salmon Parr ◽  
Atlantic Salmon Parr

Britten and the String Quartet

Tempo ◽  
1987 ◽  
pp. 2-6
Author(s):  
Anthony Payne
Keyword(s):  
String Quartet ◽  
Benjamin Britten ◽  
Early Maturity ◽  
Precocious Maturity ◽  
Variations On A Theme

THAT BENJAMIN BRITTEN already possessed in his early twenties a most astonishing technical assurance has never been in doubt; nor that he commanded a range of feeling and a stylistic integrity which proclaimed a uniquely precocious maturity. So much was evident from early published scores like the Sinfonietta, Phantasy for oboe quartet, Variations on a theme of Frank Bridge, and Our Hunting Fathers. The route by which he had reached this early maturity, however, was not generally known until comparatively recently, and the book which was for decades to remain the most reliable and perceptive guide to his music—the symposium of 1952 edited by Donald Mitchell and Hans Keller—said little about the pre-opus 1 works, or about influences.

scholarly journals Agricultural crop consumption induces precocious maturity in deer by improving physical and reproductive performance

Ecosphere ◽  
2021 ◽  
Vol 12 (4) ◽  
Author(s):  
Ayaka Hata ◽  
Rumiko Nakashita ◽  
Tomoko Anezaki ◽  
Masato Minami ◽  
Yuko Fukue ◽  
...  
Keyword(s):  
Reproductive Performance ◽  
Agricultural Crop ◽  
Precocious Maturity
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