Dietary neem oil and nonylphenol accelerate somatic growth by suppressing sex steroids mediated gonadal growth in reproductively active Labeo bata (Hamilton, 1822)

2021 ◽  
Author(s):  
Prasanta Jana ◽  
Narottam P. Sahu ◽  
Subrata Dasgupta ◽  
Gyandeep Gupta ◽  
Saumya K. Ray ◽  
...  
Keyword(s):  
Sex Steroids ◽  
Somatic Growth ◽  
Neem Oil ◽  
Gonadal Growth ◽  
Labeo Bata

Quantitative and Qualitative Characteristics of Somatic and Gonadal Growth of Yellow Perch (Perca flavescens) from Lac Ste. Anne, Alberta

1989 ◽  
Vol 46 (6) ◽  
pp. 989-994 ◽  
Author(s):  
R. W. Tanasschuk ◽  
W. C. Mackay
Keyword(s):  
Yellow Perch ◽  
Gonad Development ◽  
Perca Flavescens ◽  
Somatic Growth ◽  
Late Summer ◽  
The Other ◽  
Energy Utilization ◽  
Gonadal Growth ◽  
Males And Females ◽  
Qualitative Characteristics

A yellow perch (Perca flavescens) population from a shallow eutrophic north temperate lake was sampled 10 times between March 1976 and June 1977 to determine the characteristics of somatic and gonadal growth. Quantitatively, somatic growth differed in timing and extent among age-sex groups. One + males and females grew mostly in June whereas 2 + males grew mainly in July; 2 + females grew from June through September. Two + males grew less over the year than did the other age-sex groups. The qualitative characteristics of somatic growth were not influenced by sex or maturation. The timing of gonadal growth and the associated endogenous energy utilization differed between the sexes. One + females did not mature. Testes grew in late summer (August). There was no impact of gonad development on somatic composition of 1 + males whereas 2 + males appeared to use visceral fat. Gonadal growth for 2 + females began in August and continued through March and presumably to spawning in April; somatic lipid was depleted during ovarian growth.

scholarly journals Gonads or body? Differences in gonadal and somatic photoperiodic growth response in two vole species

2020 ◽  
Author(s):  
Laura van Rosmalen ◽  
Jayme van Dalum ◽  
David G. Hazlerigg ◽  
Roelof A. Hut
Keyword(s):  
Common Vole ◽  
Somatic Growth ◽  
Thyroid Stimulating Hormone ◽  
Breeding Strategy ◽  
Neuroendocrine System ◽  
Iodothyronine Deiodinase ◽  
Gonadal Growth ◽  
Time Reproduction ◽  
Photoperiodic Responses ◽  
Vole Species

AbstractTo optimally time reproduction, seasonal mammals use a photoperiodic neuroendocrine system (PNES) that measures photoperiod and subsequently drives reproduction. To adapt to late spring arrival at northern latitudes, a lower photoperiodic sensitivity and therefore a higher critical photoperiod for reproductive onset is necessary in northern species to arrest reproductive development until spring onset. Temperature-photoperiod relationships, and hence food availability-photoperiod relationships, are highly latitude dependent. Therefore, we predict PNES sensitivity characteristics to be latitude-dependent. Here, we investigated photoperiodic responses at different times during development in northern- (tundra/root vole, Microtus oeconomus) and southern vole species (common vole, Microtus arvalis) exposed to constant short (SP) or long photoperiod (LP).M. oeconomus grows faster under LP, whereas no photoperiodic effect on somatic growth is observed in M. arvalis. Contrastingly, gonadal growth is more sensitive to photoperiod in M. arvalis, suggesting that photoperiodic responses in somatic and gonadal growth can be plastic, and might be regulated through different mechanisms. In both species, thyroid-stimulating-hormone-β subunit (Tshβ) and iodothyronine-deiodinase 2 (Dio2) expression is highly increased under LP, whereas Tshr and Dio3 decreases under LP. High Tshr levels in voles raised under SP may lead to increased sensitivity to increasing photoperiods later in life. The higher photoperiodic induced Tshr response in M. oeconomus suggests that the northern vole species might be more sensitive to TSH when raised under SP.Species differences in developmental programming of the PNES, which is dependent on photoperiod early in development, may form part divergent breeding strategies evolving as part of latitudinal adaptation.Summary statementDevelopment of the neuroendocrine system driving photoperiodic responses in gonadal and somatic growth differ between the common and the tundra vole, indicating that they use a different breeding strategy.

scholarly journals Gonads or body? Differences in gonadal and somatic photoperiodic growth response in two vole species

2020 ◽  
Vol 223 (20) ◽  
pp. jeb230987
Author(s):  
Laura van Rosmalen ◽  
Jayme van Dalum ◽  
David G. Hazlerigg ◽  
Roelof A. Hut
Keyword(s):  
Common Vole ◽  
Somatic Growth ◽  
Thyroid Stimulating Hormone ◽  
Iodothyronine Deiodinase ◽  
Gonadal Growth ◽  
Time Reproduction ◽  
Photoperiodic Responses ◽  
Vole Species ◽  
The Common ◽  
Stimulating Hormone

ABSTRACTTo optimally time reproduction, seasonal mammals use a photoperiodic neuroendocrine system (PNES) that measures photoperiod and subsequently drives reproduction. To adapt to late spring arrival at northern latitudes, a lower photoperiodic sensitivity and therefore a higher critical photoperiod for reproductive onset is necessary in northern species to arrest reproductive development until spring onset. Temperature–photoperiod relationships, and hence food availability–photoperiod relationships, are highly latitude dependent. Therefore, we predict PNES sensitivity characteristics to be latitude dependent. Here, we investigated photoperiodic responses at different times during development in northern (tundra or root vole, Microtus oeconomus) and southern vole species (common vole, Microtus arvalis) exposed to constant short (SP) or long photoperiod (LP). Although the tundra vole grows faster under LP, no photoperiodic effect on somatic growth is observed in the common vole. In contrast, gonadal growth is more sensitive to photoperiod in the common vole, suggesting that photoperiodic responses in somatic and gonadal growth can be plastic, and might be regulated through different mechanisms. In both species, thyroid-stimulating hormone β-subunit (Tshβ) and iodothyronine deiodinase 2 (Dio2) expression is highly increased under LP, whereas Tshr and Dio3 decrease under LP. High Tshr levels in voles raised under SP may lead to increased sensitivity to increasing photoperiods later in life. The higher photoperiodic-induced Tshr response in tundra voles suggests that the northern vole species might be more sensitive to thyroid-stimulating hormone when raised under SP. In conclusion, species differences in developmental programming of the PNES, which is dependent on photoperiod early in development, may form different breeding strategies as part of latitudinal adaptation.

Ontogeny of energetic relationships and potential effects of tissue turnover: a comparative modeling study on lake trout

1998 ◽  
Vol 55 (11) ◽  
pp. 2518-2532 ◽  
Author(s):  
Jixiang He ◽  
Donald J Stewart
Keyword(s):  
Growth Model ◽  
Lake Trout ◽  
Somatic Growth ◽  
Complex Model ◽  
Individual Growth ◽  
Metabolic System ◽  
New Model ◽  
Gonadal Growth ◽  
Tissue Turnover ◽  
Energy Assimilation

Tissue turnover is endogenous energy flow and may play a regulatory role in the metabolic system of an organism. We developed a general growth model addressing potential effect of tissue turnover on energy acquisition and partitioning. We applied the model to estimate energy assimilation of lake trout (Salvelinus namaycush) in Lake Michigan and compared the model with a commonly used complex model. Both models are expansions of the Pütter - von Bertalanffy growth model. The new model suggested a consistent decreasing trend in energy net conversion efficiency (NCE) for somatic growth versus body energy. The complex model suggested that NCE is relatively stable in early ages and decreases slowly in comparison with the pattern suggested by the new model. The new model estimated higher specific assimilation rate and NCE for gonadal growth than for somatic growth of mature fish. The complex model did not distinguish gonadal growth from somatic growth. For a lake trout growing from the start of age-1 to the end of age-10, our new model suggested a total energy assimilation 25% higher than the complex model. The above comparisons support the inference that tissue turnover is an important bioenergetic component. Inclusion of tissue turnover in bioenergetic modeling analyses may be critical for studying the linkages among individual growth, reproduction, and population dynamics.

Sex steroids mediate hoxa11 expression in the human peri-implantation endometrium

1998 ◽  
Vol 5 (1) ◽  
pp. 42A-42A
Author(s):  
H TAYLOR ◽  
P IGARASHI ◽  
D OLIVE ◽  
A ARICI
Keyword(s):  
Sex Steroids

In vitro - studies with antler bone cells: Structure forming capacity, osteocalcin production and influence of sex steroids

2006 ◽  
Vol 15 (04) ◽  
pp. 245-257 ◽  
Author(s):  
H. J. Rolf ◽  
K. G. Wiese ◽  
H. Siggelkow ◽  
H. Schliephake ◽  
G. A. Bubernik
Keyword(s):  
Sex Steroids ◽  
Bone Cells ◽  
In Vitro Studies ◽  
Osteocalcin Production

Review of Somatic Growth of the Child.

1967 ◽  
Vol 12 (7) ◽  
pp. 382-383
Author(s):  
HOWARD V. MEREDITH
Keyword(s):  
Somatic Growth
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