Hormonal Concentration of Controlled and Naturally Induced Aestivated Snails (Archachatina marginata) at Different Reproductive Phases

2018 ◽  
Vol 16 (1) ◽  
pp. 1-9
Author(s):  
O Okhale ◽  
J Omoyakhi ◽  
O Edo-Taiwo ◽  
O Aremu
Keyword(s):  
Reproductive Phases ◽  
Hormonal Concentration

The hormonal control of the uterus of the bat Myotis nigricans during its different reproductive phases: emphasis on progesterone and estradiol

2021 ◽  
Author(s):  
Mateus R. Beguelini ◽  
Cornélio S. Santiago ◽  
Luiz H. A. Guerra ◽  
Fernanda C. A. Santos ◽  
Rejane M. Góes ◽  
...  
Keyword(s):  
Hormonal Control ◽  
Reproductive Phases

scholarly journals Effects of temperature and salinity on the reproductive phases of Macrocystis pyrifera (L.) C. Agardh (Phaeophyceae) in the Magellan region

2018 ◽  
Vol 31 (2) ◽  
pp. 915-928 ◽  
Author(s):  
Juan Pablo Rodríguez ◽  
J. Terrados ◽  
S. Rosenfeld ◽  
F. Méndez ◽  
J. Ojeda ◽  
...  
Keyword(s):  
Macrocystis Pyrifera ◽  
Magellan Region ◽  
Effects Of Temperature ◽  
Reproductive Phases

scholarly journals Effects of attapulgite dietary supplementation on sow performance in two commercial farms in Greece

2018 ◽  
Vol 68 (2) ◽  
pp. 193 ◽  
Author(s):  
V. KANOULAS ◽  
G. A. PAPADOPOULOS ◽  
G. ARSENOS ◽  
E. D. TZIKA ◽  
P. FORTOMARIS
Keyword(s):  
Litter Size ◽  
Repeated Measures ◽  
Average Daily Gain ◽  
Body Weight Loss ◽  
Control Group ◽  
Treatment Groups ◽  
Performance Indexes ◽  
Commercial Farms ◽  
Underlying Mechanisms ◽  
Reproductive Phases

The present study investigated the effects of attapulgite supplementation in sow diets during gestation and lactation on sow performance. The study comprised two reproductive phases (cycles) in two commercial farrow to finish farms: Farm A (capacity: 550 sows) and Farm B (capacity: 220 sows). The treatment groups were: a) control group (CN): the sows were fed a common gestation or lactation diet; b) attapulgite group (AT): the sows were fed the CN diet supplemented with attapulgite at 0,7% level; c) attapulgite plus group (AT+): the sows were fed the CN diet supplemented with attapulgite (0.7%) and a mix of enzymes, live yeast and amino acids (0.1%), at a total of 0.8% level. Within each cycle the sows included per treatment were: 24 for Farm A; 12 for Farm B. Initially data were analyzed per cycle and per each farm. Data from sows that completed both cycles within each farm, were analyzed by repeated measures analysis. Regarding sow parameters, sow body weight loss during lactation tended to be greater in AT sows compared to CN sows during cycle 1 in Farm B and was greater in AT and AT+ than CN sows in Farm A that completed both cycles (P=0.063 and P=0.023, respectively). A greater litter size 24h postpartum was observed in favour of AT compared to CN group during cycle 1 in Farm A and in sows that completed both cycles in Farm A (P=0.001 and P= 0.011, respectively). Litter size at weaning was greater in sows from the AT group than CN during cycle 1 and 2 in Farm A, in cycle 1 in Farm B and in sows that completed both cycles in Farm A (P=0.004, P=0.037, P=0.037, and P=0.022, respectively). Piglet weight at weaning and average daily gain during lactation were greater in AT group than CN and AT+ in sows that completed both cycles in Farm A (P=0.049 and P=0.040 respectively). Notable similar effects, although not statistically significant, were also observed in Farm B. This field study suggests that attapulgite supplementation in sow diets can improve performance indexes. Further research should investigate the underlying mechanisms involved.

scholarly journals GDF-9 and BMP-15 mRNA Levels in Canine Cumulus Cells Related to Cumulus Expansion and the Maturation Process

Animals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 462 ◽  
Author(s):  
George Ramirez ◽  
Jaime Palomino ◽  
Karla Aspee ◽  
Monica De los Reyes
Keyword(s):  
Gene Expression ◽  
Estrous Cycle ◽  
Expression Patterns ◽  
Cumulus Cells ◽  
Mrna Levels ◽  
Cumulus Expansion ◽  
Polymerase Chain ◽  
Specific Regulation ◽  
Reproductive Phases

The competence to undergo expansion is a characteristic of cumulus cells (CCs). The aim was to investigate the expression of GDF-9 and BMP-15 mRNA in canine cumulus cells in relation to cumulus expansion and meiotic development over the estrous cycle. CCs were recovered from nonmatured and in vitro-matured (IVM) dog cumulus oocyte complexes (COCs), which were obtained from antral follicles at different phases of the estrous cycle. Quantitative real-time polymerase chain reaction (q-PCR) was used to evaluate the relative abundance of GDF-9 and BMP-15 transcripts from the CCs with or without signs of expansion. The results were evaluated by ANOVA and logistic regression. The maturity of the oocyte and the expansion process affected the mRNA levels in CCs. There were differences (p < 0.05) in GDF-9 and BMP-15 gene expression in CCs isolated from nonmatured COCs when comparing the reproductive phases. Lower mRNA levels (p < 0.05) were observed in anestrus and proestrus in comparison to those in estrus and diestrus. In contrast, when comparing GDF-9 mRNA levels in IVM COCs, no differences were found among the phases of the estrous cycle in expanded and nonexpanded CCs (p < 0.05). However, the highest (p < 0.05) BMP-15 gene expression in CCs that did not undergo expansion was exhibited in anestrus and the lowest (p < 0.05) expression was observed in estrus in expanded CCs. Although the stage of the estrous cycle did not affect the second metaphase (MII )rates, the expanded CCs obtained at estrus coexisted with higher percentages of MII (p < 0.05). In conclusion, the differential expression patterns of GDF-9 and BMP-15 mRNA transcripts might be related to cumulus expansion and maturation processes, suggesting specific regulation and temporal changes in their expression.

scholarly journals Rooting of Camu-Camu (Myrciaria dubia) in Different Propagation Systems and Reproductive Phases

2015 ◽  
Vol 7 (5) ◽  
Author(s):  
Jhon Paul Mathews Delgado ◽  
Patrick Mathews Delgado ◽  
Carlos Abanto Rodriguez ◽  
Ricardo Manuel Bardales Lozano
Keyword(s):  
Myrciaria Dubia ◽  
Reproductive Phases

scholarly journals Plastochron and yield of Physalis peruviana L. grown in different environments and transplanting dates

2020 ◽  
Vol 41 (4) ◽  
pp. 1151
Author(s):  
André Ricardo Zeist ◽  
Juliano Tadeu Vilela de Resende ◽  
Daniel Suek Zanin ◽  
Israel Felipe Lustosa da Silva ◽  
Daniel Fernandes da Silva ◽  
...  
Keyword(s):  
Leaf Area ◽  
Growth And Development ◽  
Temperature Data ◽  
Node Number ◽  
Physalis Peruviana ◽  
Yield And Quality ◽  
Randomized Design ◽  
Crop Cycle ◽  
Completely Randomized Design ◽  
Reproductive Phases

This study aimed to estimate plastochron, leaf area, and yield of Physalis peruviana seedlings grown in different environments and transplanted on different dates. The experiment was carried out in a completely randomized design, arranged in a 2 x 3 factorial scheme, namely: two cultivation environments (protected and field) and three transplanting dates (10/27/2013, 12/15/2013, and 02/11/2014). Four replicates of eight plants were used per plot, and the four central plants composed the useful area. Based on mathematical models and temperature data, plastochron was estimated for the entire crop cycle and vegetative and reproductive phases separately. Leaf area and node number were measured, and their relationship established at the end of the study. Other variables assessed were fruit number, mass, and yield per plant. Our results showed that the higher temperatures in the protected environment anticipated phenological timings. Plastochron values of 60.0 and 16.5 °C day-1 can be used during vegetative and reproductive stages, respectively. The protected environment increased vegetative growth and development, as well as yield of P. peruviana seedlings. In the Guarapuava-PR region, P. peruviana seedlings should be transplanted during the spring so that higher fruit yield and quality could be achieved.

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