Studies on Progesterone Concentration and Fertility Response in Postpartum Subestrus Buffaloes during Breeding and Low Breeding Seasons

2021 ◽  
Author(s):  
B. Chandra Prasad ◽  
G. Venkata Naidu ◽  
M. Srinivas ◽  
M. Raghunath ◽  
Ashwini Kumar
Keyword(s):  
Breeding Season ◽  
Bubalus Bubalis ◽  
Pregnancy Rates ◽  
Progesterone Concentration ◽  
Murrah Buffaloes ◽  
Farming Community ◽  
Livestock Sector ◽  
Gross Income ◽  
Breeding Seasons ◽  
Reproductive Problem

Background: The dairy and livestock sector plays a very important role in national economy of India by contributing close to one third of gross income of rural households and nearly half of gross income in case of those without land. Subestrus is the most prevalent, frustrating and challenging problem encountered in postpartum buffaloes. Postpartum subestrus is one of the most prevalent, frustrating and challenging reproductive problem encountered in rural resulting into prolonged inter-calving period, reduced milk production and thus greatly affecting the economy of our farming community. Methods: The present study was carried out on Graded Murrah buffaloes during the period from September 2017 to August 2019 (includes breeding and low breeding season) which were maintained at farm and field. Treatment of sub-estrus lactating graded Murrah buffaloes (Bubalus bubalis) using Double PGF2 α (DPG) and Presynch-Ovsynch (POVS) their influence on fertility in farm and field condition during breeding and low breeding season was studied. Total cholesterol and progesterone concentration was recorded during different days/period of protocols. Further, overall per cent conception and pregnancy rates were recorded and compared between two protocols. Result: Progesterone levels increased significantly on day 21 post AI in pregnant buffaloes, whereas decreased significantly in non-pregnant buffaloes both in farm and field during breeding and low breeding season. The overall per cent conception and pregnancy rates were higher in POVS group than DPG group at both farm and field as well as during breeding and low breeding seasons.

Superovulatory Response and Progesterone Profile in Murrah Buffaloes (Bubalus bubalis) Pretreated with GnRH Agonist

2020 ◽  
Author(s):  
Sumit Singhal ◽  
Shiv Prasad ◽  
Rajesh Verma ◽  
H.P. Gupta ◽  
J.K. Prasad
Keyword(s):  
Embryo Transfer ◽  
Bubalus Bubalis ◽  
Hormone Concentration ◽  
Progesterone Concentration ◽  
Serum Progesterone ◽  
Group Iii ◽  
Embryo Recovery ◽  
Murrah Buffaloes ◽  
Multiple Ovulation ◽  
Group I

Background: Limited elite buffalo population need to be propagated at faster rate to sustain the dairy industry in India. Faster propagation could be achieved through embryo transfer technology. Low serum progesterone concentrations during the start of superstimulatory treatment is major factor that hampers the success of multiple ovulation embryo transfer (MOET) in buffaloes. This study evaluated the effect of GnRH pretreatment before superovulatory regimen on progesterone profile, superovulation and correlation of progesterone with superstimulatory parameter in Murrah buffaloes. Methods: Buffaloes (n=27) were superstimulated using 600 mg Folltropin and divided into three groups on basis of pretreatment: Group I and group II were pretreated with GnRH @ 10 µg and 06 µg, respectively while no pretreatment was subjected in group III (control). Progesterone hormone concentration, superovulatory response, ovulation rate, embryo recovery were recorded. Result: Our study revealed that superovulatory response was non-significantly different in all three groups and ranged from 6-8 in terms of number of corpus luteum (CL). Average number of recovered embryos in this study was nearly 2.0. A positive correlation between progesterone concentrations at the initiation of FSH treatment with number of CL and embryo recovery was observed. The study indicated that GnRH pretreatment before superstimulation improve the serum progesterone concentration, superovulatory response and embryo recovery in Murrah buffaloes. 

Seasonal variation in oestrus and ovarian activity of Finnish Landrace, Tasmanian Merino and Scottish Blackface ewes

1977 ◽  
Vol 24 (3) ◽  
pp. 363-376 ◽  
Author(s):  
A. G. Wheeler ◽  
R. B. Land
Keyword(s):  
Seasonal Variation ◽  
Breeding Season ◽  
Venous Blood ◽  
Plasma Free Fatty Acid ◽  
Reproductive Activity ◽  
Ovulation Rate ◽  
Ovarian Activity ◽  
Progesterone Concentration ◽  
Luteal Function ◽  
Breeding Seasons

SUMMARYThe patterns of seasonal variation in reproductive activity were observed over a period of 15 mo for approximately 15 females of each of three breeds: Finnish Landrace (Finn), Tasmanian Merino (Merino) and Scottish Blackface (Blackface). The incidence of oestrus was measured by teasing with vasectomized rams, and the incidence and rate of ovulation were determined frequently by laparoscopy. Luteal function was assessed from peripheral venous blood progesterone concentration on days 7 and 11 of the oestrous cycle. Nutritional status was monitored by recording body weight and plasma-free fatty acid levels throughout the study.The breeding seasons differed significantly: Finn, October to May; Merino, September to February; and Blackface, October to February. Variation in the incidence of ovulation was similar to that in the incidence of oestrus for each breed. The incidence of silent ovulation varied with the breed, being greatest in the Merino and least in the Finn. The ovulation rate varied among breeds (Finn, 2·99; Merino, 1·08 and Blackface, 1·30), and during the breeding season (e.g. Finn: November, 3·5; March, 2·6). Follicles were observed in each breed throughout the period of study.The pattern of variation in progesterone concentration was similar for each breed despite their different breeding seasons. In addition to breed differences in ovulation rate and in onset and end of the breeding season, the sensitivity to oestrogen was apparently such that, with the Finn if oestrogen secretion was high enough to stimulate ovulation it would usually also stimulate oestrus, whereas with the Merino ovulation often occurred without oestrus; this suggests that in the Merino the centres controlling ovulation are more sensitive to oestrogen than those controlling behaviour.

Effect of preovulatory follicle on fertility in Graded murrah buffaloes (Bubalus bubalis)

2017 ◽  
Author(s):  
M. Praveen Raj ◽  
G. Venkata Naidu ◽  
M. Srinivas ◽  
M. Raghunath ◽  
K. Ananda Rao
Keyword(s):  
Bubalus Bubalis ◽  
Preovulatory Follicle ◽  
Progesterone Concentration ◽  
Serum Progesterone ◽  
Physiological Maturity ◽  
Murrah Buffaloes ◽  
Pregnancy Status ◽  
Follicle Size ◽  
Relationship Of ◽  
The Relationship

An investigation was taken up to study the relationship of preovulatory follicle size at the time of first postpartum AI and CL biometry with conception using transrectal ultrasonography in 70 parous Graded Murrah buffaloes maintained under rural conditions. POF sizes were measured ultrasonographically and grouped in to small preovulatory follicle (SPF), medium preovulatory follicle (MPF) and large preovulatory follicle (LPF). Serum progesterone concentration at the time of AI and pregnancy status was negatively correlated indicating that when progesterone level declined to less than 0.3 ng/ml (basal level) at the time of AI, the chances of the animal becoming pregnant was increased. The size of the POF was positively correlated to the size of the CL on day 10 in pregnant buffaloes. The overall POF diameter at the time of estrum was 12.31 ± 0.29 mm (Range 9 to 16 mm) in Graded Murrah buffaloes and 50 % of the buffaloes had POF size > 12 - £14 mm. They conceived only if the POF diameter was more than 9 mm at the time of AI however there was no significant correlation between the POF size at the time of AI and conception. Thus, it was concluded that physiological maturity rather than the diameter of the follicle influenced the fertility in Graded Murrah buffaloes under field conditions.

scholarly journals Evidence for use of both capital and income breeding strategies in the mangrove tree crab, Aratus pisonii

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jade Carver ◽  
Morgan Meidell ◽  
Zachary J. Cannizzo ◽  
Blaine D. Griffen
Keyword(s):  
Breeding Season ◽  
Breeding Strategy ◽  
Reproductive Period ◽  
Breeding Strategies ◽  
Mangrove Tree ◽  
Income Breeding ◽  
Aratus Pisonii ◽  
Breeding Seasons ◽  
And Storage ◽  
Capital And Income Breeding

AbstractTwo common strategies organisms use to finance reproduction are capital breeding (using energy stored prior to reproduction) and income breeding (using energy gathered during the reproductive period). Understanding which of these two strategies a species uses can help in predicting its population dynamics and how it will respond to environmental change. Brachyuran crabs have historically been considered capital breeders as a group, but recent evidence has challenged this assumption. Here, we focus on the mangrove tree crab, Aratus pisonii, and examine its breeding strategy on the Atlantic Florida coast. We collected crabs during and after their breeding season (March–October) and dissected them to discern how energy was stored and utilized for reproduction. We found patterns of reproduction and energy storage that are consistent with both the use of stored energy (capital) and energy acquired (income) during the breeding season. We also found that energy acquisition and storage patterns that supported reproduction were influenced by unequal tidal patterns associated with the syzygy tide inequality cycle. Contrary to previous assumptions for crabs, we suggest that species of crab that produce multiple clutches of eggs during long breeding seasons (many tropical and subtropical species) may commonly use income breeding strategies.

scholarly journals Effects of management system on beef heifer growth and reproductive performance

2020 ◽  
Author(s):  
Parker A Henley ◽  
Frank A Ireland ◽  
Igor F Canisso ◽  
J Lannett Edwards ◽  
Daniel W Shike
Keyword(s):  
Development Strategy ◽  
Breeding Season ◽  
Reproductive Performance ◽  
Body Condition Score ◽  
Pregnancy Rates ◽  
Fescue Toxicosis ◽  
Soybean Hulls ◽  
Randomized Design ◽  
Condition Score ◽  
Calf Performance

Abstract This study evaluated the effect of heifer development system on body weight (BW), body condition score (BCS), fescue toxicosis symptoms, reproductive performance, and subsequent calf growth of fall-calving beef heifers. Angus × Simmental heifers [n = 399; 240 ± 20.0 kg initial BW; age = 252 ± 20 d] were stratified by BW and BCS and assigned to 1 of 12 groups in each of the 2 production years. The study utilized a stratified randomized design. Pens were randomly assigned to 4 treatments: drylot (DL) development (fed ad-libitum diet consisting of 90% hay and 10% DDGS on a dry matter basis), grazing endophyte-infected fescue supplemented daily (2.3 kg as-fed/heifer/d; 50:50 mix of soybean hulls and DDGS; E+/S), grazing endophyte-infected fescue and supplemented from the midpoint of treatment period until breeding (4.5 kg as-fed/heifer/d; 50:50 mix of soybean hulls and DDGS; E+/LS), and grazing novel endophyte-infected fescue with no supplement (NE+/NS). Treatments ceased on d 168 [time of artificial insemination (AI)] and heifers were commingled and managed as a group through second breeding season. Heifers in DL had greatest (P ≤ 0.05) BW and BCS from d 28 until d 254. Furthermore, E+/S heifers had greater (P ≤ 0.05) BW and BCS than both E+/LS and NE+/NS from d 28 until d 168. On d 56 and 84, E+/LS heifers had lower (P ≤ 0.05) BW and BCS compared to NE+/NS, but on d 148 treatments reranked and E+/LS remained at a greater (P ≤ 0.05) BW and BCS compared to NE+/NS through the first breeding season. Drylot heifers had greatest (P ≤ 0.05) percentage cycling and percentage of mature BW at AI (66.6%) and had greater (P ≤ 0.05) AI and overall pregnancy rates compared to E+/LS and NE+/NS. The E+/S (55%) and E+/LS (53.7%) heifers were developed to a greater (P < 0.01) percentage of mature BW than NE+/NS (49.3%). A greater (P ≤ 0.02) percentage of DL and E+/S heifers were pregnant at the end of the first breeding season (89.3 and 85.1%; respectively) compared to NE+/NS (61.5%). In summary, DL heifers had the greatest BW and BCS at AI, percentage cycling, and AI pregnancy rate. However, this strategy did not result in differing overall pregnancy rates between DL, E+/S, and E+/LS and there were no differences in milk production, rebreeding reproductive performance, and calf performance between all treatments. Finally, the poorest AI and overall pregnancy rates of the NE+/NS heifers suggests this is not a viable development strategy for fall-born heifers.

scholarly journals Ovarian follicular dynamic and plasma progesterone concentration in Alpine goats on the breeding season

2018 ◽  
Vol 70 (6) ◽  
pp. 2017-2022 ◽  
Author(s):  
N.G. Alves ◽  
C.A.A. Torres ◽  
J.D. Guimarães ◽  
E.A. Moraes ◽  
P.B. Costa ◽  
...  
Keyword(s):  
Breeding Season ◽  
Progesterone Concentration ◽  
Plasma Progesterone

scholarly journals Density and Flock Size of the Raven (Corvus corax) In the Orawa - Nowy Targ Basin During Non-Breeding Season

Ring ◽  
2006 ◽  
Vol 28 (2) ◽  
pp. 119-125
Author(s):  
Michał Ciach ◽  
Dominik Wikar ◽  
Małgorzata Bylicka
Keyword(s):  
Breeding Season ◽  
Early Spring ◽  
Food Resources ◽  
High Density ◽  
Line Transect ◽  
Flock Size ◽  
Early Winter ◽  
Corvus Corax ◽  
Line Transect Method ◽  
Breeding Seasons

Density and Flock Size of the Raven (Corvus corax) In the Orawa - Nowy Targ Basin During Non-Breeding Season During the 2002/2003-2004/2005 non-breeding seasons the density of the Raven in the open habitats of the Orawa - Nowy Targ Basin was studied by line transect method. The results were analysed in four periods (autumn, early winter, winter and early spring). The median density of Ravens did not differ significantly between individual periods and was respectively: 3.5, 3.8, 4.8 and 3.8 indiv. / 10 km. Number of birds during particular controls varied from 1.0 to 24.8 indiv. / 10 km. However, while excluding flocks, the median density of single individuals and pairs of the Raven was considerably lower and in subsequent periods reached respectively: 2.2, 2.4, 2.2 and 1.7 indiv. / 10 km. Flock size did not differ significantly between individual periods. Single individuals and, less often, groups of two birds were recorded mostly. Small (3-5 indiv.) and medium (6-15 indiv.) flocks were recorded rarely and large flocks (16 indiv. and above) - only exceptionally. The high density and strong fluctuations of abundance of Ravens were determined by flocks presence, which was probably linked to irregular occurrence of food resources.

scholarly journals Influence of body condition score at calving on the metabolic status and production performance of Murrah buffaloes (Bubalus bubalis) during the transition period

2018 ◽  
Vol 31 (11) ◽  
pp. 1756-1765 ◽  
Author(s):  
Nelson Carvalho Delfino ◽  
Lucas Fialho de Aragão Bulcão ◽  
Henry Daniel Ruiz Alba ◽  
Mauricio Xavier da Silva Oliveira ◽  
Filipe Pinheiro Soares de Queiroz ◽  
...  
Keyword(s):  
Body Condition ◽  
Transition Period ◽  
Body Condition Score ◽  
Bubalus Bubalis ◽  
Production Performance ◽  
Metabolic Status ◽  
Murrah Buffaloes ◽  
Condition Score

Phenotypic plasticity of the montane vole (Microtus montanus) in unpredictable environments

1992 ◽  
Vol 70 (11) ◽  
pp. 2121-2124 ◽  
Author(s):  
Norman C. Negus ◽  
Patricia J. Berger ◽  
Aelita J. Pinter
Keyword(s):  
Phenotypic Plasticity ◽  
Breeding Season ◽  
Growth Rates ◽  
Adaptive Strategy ◽  
Severe Drought ◽  
Microtus Montanus ◽  
Age Cohort ◽  
Montane Meadow ◽  
Study Sites ◽  
Breeding Seasons

From 1987 to 1989, the cohort dynamics of Microtus montanus populations were studied at two montane meadow sites approximately 160 km apart, in northwestern Wyoming. The 1987 and 1988 breeding seasons differed markedly from each other. In 1987, melt off occurred in April, and the first cohort was born in May (cohort 1). The entire breeding season was favorable owing to frequent rainfall throughout the summer. Cohort 1 animals grew rapidly and females began breeding at 4–5 weeks of age. Likewise, cohort 2 (June) animals exhibited rapid growth and females were breeding at 7–8 weeks of age. Cohort 3 (July and August) animals grew more slowly and most entered the winter as prepubertal animals of subadult size. At the end of the summer, cohort 3 animals represented >70% of the voles recruited during the breeding season. In 1988, following melt off in late April, precipitation was below normal and the situation intensified to severe drought through the summer. The growth rates of cohort 1 and 2 animals were significantly lower than 1987 growth rates, and very few females attained sexual maturity. At the end of the summer, cohort 3 animals represented <25% of the total recruitment at both study sites. Such apparent phenotypic plasticity of growth and maturation appears to be an evolved adaptive strategy that is responsive to several environmental cues. Both study sites, although widely separated, exhibited virtually identical patterns throughout the study.

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