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Artykuły w czasopismach na temat „Mating weight”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

ODUBOTE, I. K., and J. O. AKINOKUN. "REPRODUCTIVE AND BODY WEIGHT PERFORMANCE OF THE NEW ZEALAND WHITE RABBITS IN THE HUMID TROPICS OF NIGERIA." Nigerian Journal of Animal Production 18 (January 12, 2021): 61–65. http://dx.doi.org/10.51791/njap.v18i.1965.

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Fifty two litters obtained over a period of 8 months (December 1986-July 1987) from the mating of eight bucks with twenty nine does (first mating) and twenty three does (second mating) all belonging to the New Zealand White breed of rabbits were used in this analysis. Mean gestation length, number of mating to conception, litter size at birth and parturition interval were 31.6 ± 0.2 days, 1.4 ± 0.1, 5.6 ± 0.3 pups and 79.0 ± 14.5 days respectively. Litter weight at birth, 3,6 and 8 weeks of age were 230.4 ± 9.5g, 602.1 ± 35.6g, 1247.5 ± 81.5g and 1673.0 ± 112.3g respectively. Parity significan

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Schatz, T. J., and M. N. Hearnden. "The effect of weight and age on pregnancy rates in Brahman heifers in northern Australia." Animal Production Science 57, no. 10 (2017): 2091. http://dx.doi.org/10.1071/an16212.

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The performance of Brahman heifers at their first mating as yearlings (4-year groups of ~100 per year) grazing on improved pasture in the Douglas Daly region and as 2 year olds (3-year groups of ~100 per year) grazing on native pasture in the Victoria River District was studied. The relationships between pre-mating weight and pregnancy rate were established for Brahman heifers mated as yearlings on improved pasture, and as 2 year olds on native pasture with pre-mating weights recorded in late October/early November (before the wet season starts) and in late December (just before the start of m

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3

Reinhold, Klaus, and Hasan Sevgili. "No evidence for strategic male mating effort in response to female weight in a bushcricket." Behaviour 144, no. 10 (2007): 1179–92. http://dx.doi.org/10.1163/156853907781890904.

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AbstractTheoretical models predict that males should allocate sperm in response to female quality and empirical studies have shown that fecundity traits including age, mass and mating status can influence male sperm allocation strategies. We tested whether female size has an influence on sperm allocation in the bushcricket Poecilimon jonicus jonicus (Orthoptera: Phaneropterinae). Contrary to other studies, we found neither evidence of strategic sperm allocation in response to female size nor an effect of female size on spermatophore size. Male age and mating history was positively related to s

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4

Lee, Hosung, Yong-Chan Park, Hyo-Jun Woo, et al. "Analysis on the Contribution of Parturition Environment Factors to Birth Weight and Gestation Period in Hanwoo." Journal of Animal Breeding and Genomics 8, no. 4 (2024): 153–63. https://doi.org/10.12972/jabng.20240408.

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This study was designed to determine the environmental factors influencing birth weight and gestation period in Hanwoo by analyzing reproductive records from 2011 to 2023 of 370,444 cows. Initial statistical analyses revealed the average birth weight to be 27.27± 2.48 kg and the average gestation period to be 288.41±6.25 days over the study period. Variance analysis have significant impacts of calf gender on both birth weight and gestation period. Similarly, parity, calving season, mating year, and calving year showed substantial effects on birth weights and gestation period. It noted that the

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5

Rahnefeld, G. W., Doug Ward, and G. M. Weiss. "A comparison of methods to evaluate beef cow productivity." Canadian Journal of Animal Science 73, no. 4 (1993): 971–75. http://dx.doi.org/10.4141/cjas93-098.

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The following were compared as measures of cow productivity: (A) calf weaning weight per mating opportunity; (B) calf weaning weight per mating opportunity with cow weight at weaning as a covariate; (C) calf weaning weight per mating opportunity per unit of cow weight at weaning; and (D) calf weaning weight per mating opportunity per cow metabolic weight (kg0.75) at weaning. Results indicate that the method described under (C) is best at reducing error followed closely by the method described under (D). The least satisfactory measure of cow productivity was (B). Key words: Beef cattle, cow eff

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Ososanya, T. O. "Effect of broiler litter supplementation on reproductive performance of West African Dwarf sheep." Nigerian Journal of Animal Production 42, no. 2 (2015): 180–86. http://dx.doi.org/10.51791/njap.v42i2.2667.

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Four low cost feed samples were formulated using 0, 25, 50 and 75% levels of broiler litter processed into feed along with other feed ingredients. Sixteen (16) primiparous West African Dwarf (WAD) ewes aged between twelve and eighteen months old were dewormed using Ivermectin and dipped against ticks and fleas using diazintol. Oestrus was artificially synchronized in all the ewes using Iml of Prostaglandin - 2Fα administered intramuscularly, the animals were mated with rams of known fertility and lineage bred. Ewes were evaluated in a pregnancy trial while the lambs born were evaluated in a pr

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Ilic, Zoran, A. Jevtic-Vukmirovic, M. P. Petrovic, et al. "Effect of mating method, sex and birth type on growth of lambs." Biotehnologija u stocarstvu 29, no. 2 (2013): 277–86. http://dx.doi.org/10.2298/bah1302277i.

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Estrus synchronization methods was use to control the reproductive traits of sheep, as well as bringing more females at the same stage of estrus and ovulation. According to the points mentioned above, the aim of the present study was to investigate and compare mating method and influence of fixed factors on birth and weaning weight of lambs. Statistical analysis showed that exist difference in the body weights between genotypes of lambs. In the first group, the difference in weight of lambs at birth, regardless of mating method was not significant (P> 0.05), while in the second group, the d

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8

Schreurs, N. M., P. R. Kenyon, F. J. Mulvaney, P. C. H. Morel, D. M. West, and S. T. Morris. "Response of additional ewe lamb liveweight during gestation on birth and weaning weight of offspring and liveweight of the ewe lamb at weaning." Animal Production Science 50, no. 6 (2010): 528. http://dx.doi.org/10.1071/an09185.

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Increasing the liveweight of ewe lambs during gestation may have positive effects on lamb birthweight and weaning weight and also on ewe lamb liveweight at weaning. Specific times during the gestation period of the ewe lamb may be more responsive to improved nutrition and increases in liveweight. The objective of this work was to use a meta-analytic approach to investigate the effects of ewe lamb liveweight at mating and during pregnancy on lamb birth and weaning weights, and the ewe lamb’s liveweight at weaning. Increasing ewe lamb liveweight in early gestation and in particular before mating

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9

Gunn, R. G., and T. J. Maxwell. "A note on the effect of the direction of live-weight change about the time of mating on reproductive performance of Greyface ewes." Animal Science 48, no. 2 (1989): 471–74. http://dx.doi.org/10.1017/s0003356100040484.

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Over 3 years, in Greyface ewes stocked at 10 or 15 per ha and mated in October (early) or November (late), lamb production at birth was related to the pattern of live-weight change of the individual ewe about mating. Based on weighings at 1·5- to 3-week intervals, ewes were grouped according to whether they were gaining (114 ewes), losing (221) or apparently maintaining weight (339) at the time of mating. Ewes losing weight produced significantly fewer lambs (1·58) than did ewes maintaining weight (1·78) while both produced significantly fewer lambs than did ewes gaining weight (1·96). Differe

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10

Akter, S., N. Nahar, and M. Rahman. "Effects of Garlic Clove, Neem and Eucalyptus Leaf Extract on Mating Behaviour, Oviposition and Adult Emergence of Pulse Beetle, Callosobruchus maculatus." Progressive Agriculture 18, no. 2 (2014): 93–97. http://dx.doi.org/10.3329/pa.v18i2.18164.

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Experiments were conducted in the laboratory to study the effects of garlic clove, neem and eucalyptus leaf extracts on mating behaviour, oviposition and adult emergence of pulse beetle, Callosobruchus maculatus. Intensity of seed damage and weight loss of gram seeds were also recorded. The results showed that the mating frequency, mating duration, oviposition, adult emergence of pulse beetle and weight loss of gram seeds were reduced significantly after application of the extracts. Among the extracts, neem leaf extracts showed lowest mating frequency (1), mating duration (3.66 minutes), lowes

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11

Allison, David B., Michael C. Neale, Melissa I. Kezis, Vincent C. Alfonso, Stanley Heshka, and Steven B. Heymsfield. "Assortative mating for relative weight: Genetic implications." Behavior Genetics 26, no. 2 (1996): 103–11. http://dx.doi.org/10.1007/bf02359888.

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12

Baliarti, E., A. S. Wardani, B. W. Prabowo, et al. "Comparison of Aceh cow’s performance on different mating systems at BPTU HPT Indrapuri, Aceh Province, Indonesia." IOP Conference Series: Earth and Environmental Science 902, no. 1 (2021): 012040. http://dx.doi.org/10.1088/1755-1315/902/1/012040.

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Abstract This research aimed to compare Aceh cow’s performance on different mating systems at BPTU HPT Indrapuri, Indonesia. This research uses 202 Aceh cows with varying systems of mating; natural mating (164 cows), and artificial insemination (AI; 38 cows). Cow’s performance data included birth weight, postpartum mating, calving interval, weaning weight, Cow Reproduction Index (CRI), and Cow Production Index (CPI), obtained from the recording in 2014-2019 and calculation. This research uses the Oneway Anova test to analyze the cow’s performance between mating systems. The results of the cow’

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13

Khotijah, Lilis, A. Maulidina, Kukuh Budi Satoto, and Komang Gede Wiryawan. "The Effect of Different Energy Level on The Ration to The Mating Acceleration of Local Sheep." Jurnal Ilmu Nutrisi dan Teknologi Pakan 16, no. 3 (2018): 52. http://dx.doi.org/10.29244/jintp.16.3.52-55.

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The aim of this research was to find the appropriate ration energy levels to determine the puberty time of ewes. The study used 12 offspring female sheep obtained from crossing Jonggol ewes of Animal Science Teaching and Research Unit (JASTRU) Faculty of Animal Science IPB with Garut male sheep. The animal age was approximately 2-3 months with the average body weight 9.79 ± 1.97 kg. The treatments were consisted of 3 rations which have different TDN level, namely: T1= 65% TDN, T2=70% TDN and T3= 75% TDN. The experimental design used was a completely randomized design with three treatments and

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Gunn, R. G., T. J. Maxwell, W. F. Smith, R. D. M. Agnew, C. D. Kerr, and D. A. Sim. "A note on the effect of post-mating stocking rate on reproductive performance of Greyface ewes." Animal Science 52, no. 3 (1991): 548–50. http://dx.doi.org/10.1017/s0003356100013131.

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Continuously grazed rye grassl clover swards with surface heights of 8 to 10 cm at 5 weeks before a synchronized mating and 7·5 cm at mating were grazed by 151 Greyface ewes stocked at 12 per ha until mating. The effects of two stocking rates (eight and 16 ewes per ha) for 6 weeks over the mating and post-mating period were then studied on live weight, body condition and reproductive peformance. Sward height fell more rapidly post mating when stocked at 16 ewes per ha than at eight ewes per ha, but remained above 3·5 cm until 4 weeks after first mating under both rates. Ewes stocked at 16 per

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15

Oseni, S. O., and B. A. Ajayi. "Descriptive characterization of a nigerian heterogeneous rabbit population - factors affecting litter traits." World Rabbit Science 18, no. 2 (2010): 111. http://dx.doi.org/10.4995/wrs.2010.18.14.

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<span style="font-size: small;"><span style="font-size: 13px; line-height: 14px;">Thi study evaluated the effect of female body weight at conception (FWC), season of mating (SM), type of mating (TM) and litter size at birth (LSB) on the litter performance in a heterogeneous Nigerian population of rabbits. Data on 116 litters from 10 bucks and 48 does across three parities were analysed. Reproductive traits evaluated included LSB, number born alive (NBA), litter sizes and weights at 7, 14 and 21 d post-kindling, pre-weaning survival rate (SR) and daily weight gain of kits from kindl

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Dion, Nicole, and Francis Minvielle. "The effects of alternated cycles of full-sib and random mating on selection for pupa weight in Tribolium castaneum." Canadian Journal of Genetics and Cytology 27, no. 2 (1985): 251–54. http://dx.doi.org/10.1139/g85-037.

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Individual responses to selection for high pupal weight in Tribolium castaneum under two types of mating, cyclic full-sib random-mating system and random mating, were observed for 15 generations. No significant differences have been observed between the two types of mating for the selection response, differential selection, realized heritability, and the number of larvae per generation. Realized heritability of the pupal weight was 0.33 ± 0.02 and 0.42 ± 0.02 for the inbred lines and for the random-mated lines, respectively.Key words: inbreeding, pupa weight, Tribolium.

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17

Rose, R. W., C. M. Nevison, and A. F. Dixson. "Testes weight, body weight and mating systems in marsupials and monotremes." Journal of Zoology 243, no. 3 (1997): 523–31. http://dx.doi.org/10.1111/j.1469-7998.1997.tb02798.x.

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Torres-Vila, L. M., M. C. Rodríguez-Molina, and J. Stockel. "Delayed mating reduces reproductive output of female European grapevine moth, Lobesia botrana (Lepidoptera: Tortricidae)." Bulletin of Entomological Research 92, no. 3 (2002): 241–49. http://dx.doi.org/10.1079/ber2002155.

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AbstractVirgin females of Lobesia botrana Denis & Schiffermüller were mated at ages of 1, 3, 5, 8, 12 and 16 days and the effect of mating delay on reproductive output assessed. Delayed mating did not affect female mating success but fertilization was reduced in 16-day-old females. Increased mating delays substantially affected daily oviposition pattern and resulted in a significant reduction of both fecundity and fertility, so that mean number of viable eggs laid decreased from 150 to 22 in 1- and 16-day-old mated females, respectively. Heavier females were more constrained than lighter o

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Bettenay, RA. "Effect of growth rate and mating age of dairy heifers on subsequent production over four years." Australian Journal of Experimental Agriculture 25, no. 2 (1985): 263. http://dx.doi.org/10.1071/ea9850263.

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An experiment was conducted using Friesian heifers in a Mediterranean environment to examine the effect of growth rate to mating and mating age on subsequent production. Heifers were mated at 12, 15, 18 or 24 months of age and at target mating weights of either 250 or 300 kg liveweight. Differential feeding ceased at the end of mating but, after calving, cows were grazed at one of two stocking rates. There were 64 cows in the milking phase of the experiment. Liveweight and production were measured over four lactations. There were no differences in production associated with target weight. Prod

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Wolcott, M. L., D. J. Johnston, and S. A. Barwick. "Genetic relationships of female reproduction with growth, body composition, maternal weaning weight and tropical adaptation in two tropical beef genotypes." Animal Production Science 54, no. 1 (2014): 60. http://dx.doi.org/10.1071/an13012.

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The genetic relationships of female reproduction with growth and body composition, tropical adaptation traits and maternal weaning weight (descriptive of genetic potential milk production) were estimated in 1027 Brahman (BRAH) and 1132 Tropical Composite (TCOMP) females. Female reproduction was evaluated at puberty, as outcomes of the first and second annual mating periods (Mating 1 and Mating 2, which commenced when females averaged 27 and 39 months of age, respectively), as well as annual averages over up to six matings. Traits evaluated included age at puberty, Mating 1 and 2 pregnancy rate

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Sulkarnain, Muhammad Nur, Zulkharnaim A, Lellah Rahim, Hasman A, and Andi Annisa. "The Influence of Altitude of Place on Birth Weight and 3-Month Weight of Bali Cattle on Beef Cattle Breeding Participatory System in Barru Regency." Advances in Environmental Biology 16, no. 11 (2022): 6–10. http://dx.doi.org/10.22587/aeb.2022.16.11.2.

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This study aimed to determine the difference in birth weight and 3-month weight of Bali cattle that were reared at different heights. This research was carried out on January 20, 2022, located in Barru Regency. The results showed that Bali cattle at an altitude of <100 masl ( 14.26±0.45a ) differed from birth weight at an altitude of >200 masl (14.00 0.75 b). This indicates that the altitude has a significant effect on cattle birth weight,;the higher the place, the lower the birth weight. The low birth weight of cattle is due to the semi-intensive cattle rearing management ssystem,and th

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Pacheco, Rangel Fernandes, Ivan Luiz Brondani, Dari Celestino Alves Filho, et al. "Reproductive performance of heifers of different weight classes in the first and second mating." Semina: Ciências Agrárias 40, no. 2 (2019): 819. http://dx.doi.org/10.5433/1679-0359.2019v40n2p819.

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The objective of this study was to evaluate the effect of live weight at first mating on reproductive performance in the first and second reproductive years. For that purpose, the reproductive history of 221 heifers mated for the first time between the years of 2003 and 2012 was evaluated. Heifers were grouped into three weight classes at the age of 24 months: 50-59.9% (55%), 60-69.9% (65%), and 70-80% (75%). The pregnancy rate in the first reproductive year in heifers from weight classes 55%, 65%, and 75% was 38.0%, 56.4%, and 69.0%, respectively. The pregnancy rate in the second reproductive

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Wolcott, M. L., D. J. Johnston, S. A. Barwick, N. J. Corbet, and P. J. Williams. "The genetics of cow growth and body composition at first calving in two tropical beef genotypes." Animal Production Science 54, no. 1 (2014): 37. http://dx.doi.org/10.1071/an12427.

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The genetics of cow growth and body composition traits, measured before first calving (pre-calving: in females before calving following their first 3-month annual mating period, at an average age of 34 months) and at the start of the subsequent mating period (Mating 2: on average 109 days later), were evaluated in 1016 Brahman (BRAH) and 1094 Tropical Composite (TCOMP) cows. Measurements analysed were liveweight, ultrasound-scanned measurements of P8 and 12/13th rib fat depth and eye muscle area, body condition score and hip height. Traits describing the change in these from pre-calving to Mat

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Thomson, E. F., and F. A. Bahhady. "A note on the effect of live weight at mating on fertility of Awassi ewes in semi-arid north-west Syria." Animal Science 47, no. 3 (1988): 505–8. http://dx.doi.org/10.1017/s0003356100003688.

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Ninety Awassi ewes managed at different levels were used to study the effect of live weight mating on fertility over 3 years in semi-arid north-west Syria. During the 56-day pre-mating period fertile ewes had higher daily live-weight gains than infertile ewes (P < 0·01), frequency of oestrous cycles increased as live weight increased (P < 0·001) and fertile ewes tended to have more frequent oestruses than infertile ewes (P > 0·05). Ewe fertility was related (r = 0·87) to live weight at mating and twinning reached a maximum (four per 100 ewes lambing) in 51· to 56-kg ewes then decrease

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Nuraini, D. M., S. Prastowo, and N. Widyas. "Weaning rate, birth weight, and weaning weight of Jawarandu and Boer crossbreed goat from naturally serviced and artificially inseminated does." IOP Conference Series: Earth and Environmental Science 902, no. 1 (2021): 012029. http://dx.doi.org/10.1088/1755-1315/902/1/012029.

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Abstract Two types of mating had been practiced in the crossbreed of Jawarandu does and Boer buck that produced Boerja goat, the natural service and artificial insemination. This study aimed to compare the weaning rate, birth weight, and weaning weight of offspring from both mating methods and analyze the different birth and weaning weights on different sex and birth type. A total of 271 kids were born from naturally serviced (NS) and artificially inseminated (AI) does (221 and 50, respectively). All kids were managed in the same condition. The number of kid died pre-weaning, birth weight, and

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Sunadi, Bambang, I.-K. Sutama, and I.-G. M. Budiarsana. "Reproductive and productive efficiencies of Etawah Grade goats under various mating managements." Jurnal Ilmu Ternak dan Veteriner 2, no. 4 (2014): 233–36. https://doi.org/10.14334/jitv.v2i4.77.

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Thirty six Etawah Grade (PE) goats were treated with three type of mating managements, i.e. mated at the first oestrous (A), mated at the second oestrous (B), and mated at the third oestrous (C) after parturition, respectively . Results showed that average first estrous was 56 days (26-99 d) after parturition with estrous cycle of 21 days . Conception rate at the first and second oestrous mating managements (A and B) were 50 and 70%, respectively . Variability of birth weight (3,4 - 3,5 kg) under three mating managements were not significantly different (P0 .05), but the weaning weight of kids

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Peiró, Rosa, María-José Argente, and María-Luz García. "Changes in Body Reserves, Non-Esterified Fatty Acids, and Leptin during the Reproductive Lifespan of the Rabbit Female." Animals 13, no. 20 (2023): 3213. http://dx.doi.org/10.3390/ani13203213.

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The aim of this work is to study changes in body weight, perirenal fat thickness (PFT), and non-esterified fatty acid (NEFA) and leptin concentrations throughout the reproductive life of the rabbit female and their correlations when a semi-intensive reproductive rhythm is applied. A total of 46 lactating females were used. Body weight, PFT, and NEFA and leptin concentration were recorded at 12 weeks of age, at first mating and delivery, and at second, third, and fourth mating, 12th d of gestation, and delivery. The highest body weight was detected on the 12th d of any gestation, around 4280 g,

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Villa-Ayala, Patricia, Javier Hernández-Reynoso, and Alfredo Jiménez-Pérez. "Mate Selection on Anastrepha curvicauda: Effect of Weight, Age, and Virginity." Insects 14, no. 4 (2023): 317. http://dx.doi.org/10.3390/insects14040317.

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Sexual selection determines the evolution of the species by favoring some attributes that confer a reproductive advantage to those individuals with those attributes. Tephritidae flies do not always select the same traits when looking for a mating partner. Some aspects of the mating system of Anastrepha curvicauda are known; nevertheless, there is no information on the effect of age, size, and virginity when selecting a mating partner. We set up a series of experiments where a selector (male or female) may select between (a) an old or young partner, (b) a small or large partner, and (c) a virgi

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Anh, Pham Thi Van, Dau Thuy Duong, Nguyen Huu Thang, Nguyen Thi Huong Lien, Nguyen Minh Duc, and Mai Phuong Thanh. "Reproductive/developmental toxicity screening test of kovir capsules in mice." Tạp chí Nghiên cứu Y học 173, no. 12E13 (2023): 54–62. http://dx.doi.org/10.52852/tcncyh.v173i12e13.1899.

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The present study was performed to gather information on the effects of Kovir capsules on reproductive and developmental parameters in mice according to the OECD guideline for reproductive/developmental toxicity screening test. The test item was administered orally at dose levels of 1.44 and 2.16 capsules/kg body weight/day to male mice from 2 weeks before mating to the end of the 14-day mating period and females from 2 weeks before mating, during mating, gestation, and until the 13th day of lactation. During the study period, clinical signs, body weight, relative organ weight, reproductive an

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El-Sayiad, Gh A., I. F. M. Marai, and E. A. Afifi. "Phenotypic and genetic characteristics of growth of Peking ducklings under Egyptian conditions." Journal of Agricultural Science 110, no. 1 (1988): 179–90. http://dx.doi.org/10.1017/s002185960007982x.

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SummaryPeking ducklings were classified at 6 weeks of age according to their body weights in two categories: R, below the overall mean of the flock which were considered as retarded growth; and L, those of body weight equal to the overall mean and above which were considered as large. From each group, males and females were chosen to be parents of the next generation in a ratio 1:5 at 6 months of age and four systems of matings were conducted: RR, LL, RL and LR.At all ages studied the large ducklings were significantly heavier than retarded growth ones and had significantly greater body gain,

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Alphonsus, .C, Akpa.G.N, I.M Sam, O. .C.P Agubosi, F.I Finangwai, and C. Mukasa. "RELATIONSHIP OF PARITY AND SOME BREEDING CHARACTERISTICS IN RED SOKOTO GOATS." Continental J. Animal and Veterinary Research 2 (June 16, 2010): 25–30. https://doi.org/10.5281/zenodo.818023.

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Data on some breeding characteristics; litter size (LS) kidding interval (KI), dam mating weight (Mwt), Kidding weight(Kwt) and 60 day post kidding weight(60dPKwt) as well as body size characteristics(HW,BL and HG) collected from 1000 Red Sokoto does of small holder farmers in Kano State, Nigeria, were analysed to estimate the relationships amongst these characteristics themselves and between them with parity of dam. The mean LS, KI, Mwt, Kwt and 60dPKwt were 1.45, 6.90 months 20.4kg, 24.7kg, and 23.0kg, respectively. The mean height-at-withers (HW), body length (BL) and chest girth (CG) were

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Urun, Samet, and Emre Şirin. "Determination of the effect of pre-mating weight and placental characteristics on birth weight in Karayaka sheep." Archives Animal Breeding 66, no. 4 (2023): 335–40. http://dx.doi.org/10.5194/aab-66-335-2023.

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Abstract. The aim of this study was to determine the effect of the pre-mating weight and placental characteristics on birth weight. Data were collected from 62 Karayaka ewes and 70 Karayaka lambs. The placental characteristics considered were placental weight, placental area and the number of cotyledons. The Pearson correlation coefficient was used for statistical comparison and the determination of relationships between variables. In addition, correlation coefficients between live weights and placental characteristics were determined. The average birth weight (BW), pre-mating weight (PMW), pl

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Ibom, I. A., B. Okon, and F. I. Okon. "Correlation, regression estimates and heterosis of Archachatina marginata snails in Calabar, Nigeria." Nigerian Journal of Animal Production 46, no. 3 (2020): 64–72. http://dx.doi.org/10.51791/njap.v46i3.856.

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White skinned ectotypes were used in a study to estimate heterosis, correlation and regression. Data collected on the snails and their eggs included body weight (BWT), shell length (SLH), shell width (SWH), “mouth” length (MLH) and “mouth” width (MWH); and egg weight (EWT), egg length (ELH) and egg width (EWH), respectively. These data were used to estimate correlations between pairs of traits, heterosis and to predict weight from other morphometric traits among three mating groups [black skinned x black skinned (BAM X BAM), white skinned x white skinned (WAM X WAM) and their cross BAM X WAM)]

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Epplen, Jorg, Esther Schwarz-Weig, Anja Keil, and Norbert Sachser. "BEHAVIOURAL STRATEGIES, TESTIS SIZE, AND REPRODUCTIVE SUCCESS IN TWO CAVIOMORPH RODENTS WITH DIFFERENT MATING SYSTEMS." Behaviour 136, no. 9 (1999): 1203–17. http://dx.doi.org/10.1163/156853999501720.

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AbstractWe summarize our studies on the social and mating systems of Cavia aperea and Galea musteloides , two closely related South-American rodents. In Cavia an extremely high incompatibility exists among adult males. As a consequence, only a single male can be kept together with several females even in richly structured enclosures of 20 m2. From this, a polygynous mating system emerges. In contrast, under similar housing conditions male Galea are much more tolerant and large groups can be established consisting of several adult males and several adult females. The mating system of Galea is p

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Sulieman, A. H., A. E. Bashar, H. A. El Tahir, and S. A. H. Sulieman. "Live Weight and Live Weight Changes and Some Relationships of Certain Reproductive Traits in the Breeding Female Shugor and Dubasi Sub-Types of Sudan Desert Sheep." Veterinary Medicine and Public Health Journal 3, no. 3 (2022): 36–42. http://dx.doi.org/10.31559/vmph2022.3.3.1.

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This study was carried out at the National Sheep Research Station in Elhuda, Sudan to investigate the situation of female sheep conditions while in gestation and to consult some aspects associated to pregnancy parameters and others on live weight were collected, processed and statistically tested in addition to variability consideration. Thus, live weight changes its variability and some relationships for certain reproductive traits in the Shugor and Dubasi subtypes of Sudanese Desert sheep ewes were studied from mating events to the immediate postpartum date. The overall live weight changes d

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Gonzalez, R. E., D. Labuonora, and A. J. E. Russel. "The effects of ewe live weight and body condition score around mating on production from four sheep breeds in extensive grazing systems in Uruguay." Animal Science 64, no. 1 (1997): 139–45. http://dx.doi.org/10.1017/s1357729800015642.

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AbstractEwe live iveights were recorded 4 weeks prior to mating, at the beginning of mating and 22 to 23 days later over a period of 3 years in a flock of some 300 breeding ewes comprising approximately equal numbers of Australian Merino, Ideal (Polwarth), Merilin and Corriedale breeds in a pastorally based grazing system in Uruguay. Multiple-bearing ewes were generally heavier than single-bearing ewes which in turn were heavier than ewes which did not conceive, these differences being greatest in 3- and 4-year-old ewes (i.e. in their second and third breeding seasons). Body condition scores o

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ABEGAZ, S., G. DUGUMA, E. NEGUSSIE, U. GELMESA, F. TEREFE, and J. E. O. REGE. "Factors affecting reproductive performance and estimates of genetic parameters of litter size in Horro sheep." Journal of Agricultural Science 139, no. 1 (2002): 79–85. http://dx.doi.org/10.1017/s0021859602002265.

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Conception and lambing rate, and litter size were studied on data from a flock of Horro sheep. The CATMOD and GLM procedures of SAS were used for the analysis of these traits. A sire, direct additive genetic and a repeatability animal model were employed to obtain estimates of heritability and repeatability for litter size. The results obtained showed that year of mating, age and weight of ewes at mating and number of previous parities had significantly (P<0.01) affected the rate of conception and lambing while weight of rams at mating has shown no significant effect (P>0.05). An increas

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D, Ganbat, Mandakh B, and Baldan T. "EFFECT OF GROUP MATING SCHEMES ON LAMB GROWTH PERFORMANCE." Mongolian Journal of Agricultural Sciences 21, no. 02 (2018): 49–52. http://dx.doi.org/10.5564/mjas.v21i02.917.

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The study was aimed to determinate the effect of group mating scheme on lamb growth performance. Rams, representing different group mating scheme, were assigned to mate 60-80 ewes per a ram for a 45-day breeding period. In group mating scheme, each ram is placed in a separate pasture with a group of ewes gathered from participating herders involved in group breeding during mating season. The average birth, weaning and post weaning weight for lambs from the group mating of selected rams to selected ewes involved in the study were 4.4, 33.8 and 40 kg for male lambs and, 4.3, 29.8 and 35.7 kg for

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Adriani, Adriani. "Pertumbuhan dan Dimensi Tubuh Anak Kambing sebagai Respons Pemberian PMSG pada Induk sebelum Dikawinkan." Jurnal Ilmiah Ilmu-Ilmu Peternakan 14, no. 2 (2011): 103–10. http://dx.doi.org/10.22437/jiiip.v14i2.870.

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Fifty Four birth goat were used to study the growth and body dimensions by response of giving PMSG at prior to mating. The experimental does were injected with pregnant mare serum gonadothrophin (PMSG), 0 IU/kg BW and 15 IU/kg BW. Intravaginal sponge (60 mg medroxyprogesterone acetate) was applied for 14 days to synchronize estrus cycle. Twenty four hours prior to sponge removal, PMSG was injected to stimulate PMSG, than, 5 does were mixed with 1 buck for natural mating. The results showed that administration of PMSG at prior to mating of the does can increase of the birth weight (p<0.01),

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Kendall, Matthew S., Donna L. Wolcott, Thomas G. Wolcott, and Anson H. Hines. "Reproductive potential of individual male blue crabs, Callinectes sapidus, in a fished population: depletion and recovery of sperm number and seminal fluid." Canadian Journal of Fisheries and Aquatic Sciences 58, no. 6 (2001): 1168–77. http://dx.doi.org/10.1139/f01-065.

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We evaluated the depletion and recovery rates of sperm number and vas deferens weight following mating for male Callinectes sapidus both below (<127 mm carapace width) and well above (>140 mm) the fishery size limit for hard crabs in Chesapeake Bay (127 mm). Large males had low sperm count and vas deferens weight immediately after mating and required approximately 920 days to fully recover. After mating, small males had significant reduction in sperm number despite no significant change in vas deferens weight. Furthermore, small males with completely recovered seminal stores had signifi

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Oregui, L. M., D. Gabiña, M. S. Vicente, M. V. Bravo, and T. Treacher. "Relationships between body condition score, body weight and internal fat deposits in Latxa ewes." Animal Science 65, no. 1 (1997): 63–69. http://dx.doi.org/10.1017/s1357729800016301.

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AbstractThe relationships between body weight (BW), body condition score (BCS) and internal fat deposits were studied in Latxa dairy ewes. In 2 years, the BW and BCS of 20% of the ewes in 14 flocks were recorded at the beginning of the mating period (pre-mating), and in the 1st month of lactation (post lambing). BW increased with age (BW = 54·05 × (1-e−0·988 × age), and the mature weight was not reached until 4 years, after which weight did not differ between pre-mating and post-lambing periods. Body condition score, however, differed between the two periods. The regression coefficients (b) of

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Kerr, J. C., and N. D. Cameron. "Responses in gilt traits measured during performance test, at mating and at farrowing with selection for components of efficient lean growth rate." Animal Science 63, no. 2 (1996): 235–41. http://dx.doi.org/10.1017/s135772980001479x.

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AbstractThe responses in traits measured at the start of the mating period and at farrowing were examined after seven generations of divergent selection for daily food intake (DFI), lean food conversion (LFC), lean growth rate (LGA) on ad-\ibitum feeding and lean growth on scale feeding (LGS). Weight and backfat depth at mating were measured on 330 gilts and 74 boars, which were selected on the basis of performance test traits. Farrowing information was available on 259 gilts. At the start of the mating period, gilts selected for high DFI, LGA or LGS had similar live weights (135, 137 and 137

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Koketsu, Yuzo, and Gary D. Dial. "Factors associated with prolonged weaning-to-mating interval among sows on farms that wean pigs early." Journal of the American Veterinary Medical Association 211, no. 7 (1997): 894–98. http://dx.doi.org/10.2460/javma.1997.211.07.894.

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Objective To determine factors associated with weaning-to-mating interval among sows on commercial farms that wean pigs early. Design Cohort study. Animals 11,861 farrowing sows. Procedure Production, farrowing, and feed intake records were reviewed for sows on 16 farms for which mean duration of lactation was between 14.9 and 18.9 days. Results Among sows with high feed intake during lactation (≥ 5.6 kg/d [12.3 lb/d]), lactation duration was not associated with weaning-to-mating interval, but among sows with low feed intake during lactation (< 5.6 kg/d), weaning-to-mating interval increase

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Marai, I. F. M., A. H. Daader, and L. B. Bahgat. "Performance traits of purebred Ossimi and Rahmani lambs and their crosses with Finnsheep born under two accelerated mating systems." Archives Animal Breeding 52, no. 5 (2009): 497–511. http://dx.doi.org/10.5194/aab-52-497-2009.

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Abstract. The aim of the study was to carry out crossing of the local breeds with a known prolific breed with the hope to be a beginning to develop improved synthetic lines under the sub-tropical conditions. In the present study, the data represented 4 genotypes: 2 pure Egyptian local fat-tailed breeds [Ossimi (O) and Rahmani (R)], one back-cross [1/4 Finnish Landrace (F) 3/4 O] and one 3-breed-cross [1/4 F 1/4 O 1/2 R]. The lambs resulted from two accelerated systems: 3 lambings/2 years and 2 lambings/1 year. The results showed that in 3 lambings/2 years and 2 lambings/1 year systems, the cro

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R.U., Turganbaev, and Ko'charov S.Y. "Changes in Live Weight Across Age Dynamics of Offspring Obtained from Mating Camelus Dromedarius And Camelus Bactrianus Camels." American Journal Of Agriculture And Horticulture Innovations 5, no. 4 (2025): 15–17. https://doi.org/10.37547/ajahi/volume05issue04-04.

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This article determines and draws conclusions on the changes in live weight across age dynamics of offspring obtained from mating Camelus dromedarius and Camelus bactrianus camels in various pasture conditions of the Ustyurt Plateau in the Republic of Karakalpakstan.

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Ibrahim, Hadeel K. "Effect of time of using feed blocks as supplementary feed on the weightchanges and reproductive performance of Awassi yearling ewes depend on crop residues as basal diet." Iraqi Journal of Veterinary Medicine 29, no. 1 (2005): 127–39. http://dx.doi.org/10.30539/iraqijvm.v29i1.874.

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This study was conducted to evaluate the Effect of time of using feedblocks (FB) as supplementary feed on the weight changes and reproductiveperformance of Awassi yearling ewes depend on crop residues as basal diet. .Sixty Awassi yearling ewes (mean live weight 39.51 kg) aged 12-13 monthswere allocated into four groups according to their live weight. First group (T1)fed conventional diet (barley grains + straw). The second group (T2) fedconventional diet plus FB during pre and post mating. The third group (T3) fedconventional diet plus FB during pre and mating. The fourth group (T4) fedconvent

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Tomlinson, I. P. M., P. W. E. Kearns, and C. J. Veltman. "Nonrandom mating in the two-spot ladybird (Adalia bipunctata): The influence of weight on mating success." Behavior Genetics 25, no. 5 (1995): 467–74. http://dx.doi.org/10.1007/bf02253375.

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Manalu, W. "The effect of superovulation prior to mating on fetal growth in Iambs from Javanese thin-tail ewes." Jurnal Ilmu Ternak dan Veteriner 4, no. 4 (2014): 243–50. https://doi.org/10.14334/jitv.v4i4.166.

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Twenty-nine fetuses (11 fetuses from 9 non-superovulated ewes and 18 fetuses from 8 superovulated ewes) were used to study the effect of superovulation of ewes prior to mating on fetal weight, fetal length, the length of the body and limbs, chest circumference, weights of the body, head, neck, limb, and viscera. Superovulated ewes, though with a higher litter size, had a greater fetal growth as was indicated by the greater fetal weight and length, the length and weight of the body and limb on day 49 of pregnancy. On day 105 of pregnancy, superovulated ewes with multiple fetuses (â‰¥3) had simi

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Paris, D. B. B. P., D. A. Taggart, G. Shaw, P. D. Temple-Smith, and M. B. Renfree. "Changes in semen quality and morphology of the reproductive tract of the male tammar wallaby parallel seasonal breeding activity in the female." Reproduction 130, no. 3 (2005): 367–78. http://dx.doi.org/10.1530/rep.1.00538.

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Changes in semen quality and morphology of the male reproductive tract were studied throughout the year in the highly promiscuous tammar wallaby. Body size, semen quality and gross morphology of the reproductive organs were assessed in adult males each month from January to November. The mean weight of males was similar in most periods sampled, but males were slightly heavier in the minor (P < 0.05) than the non-breeding season. Since body weight was correlated with weights of the testes, epididymides and accessory sex glands, organ weights were adjusted for body weight in subsequent analys

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Lambe, N. R., S. Brotherstone, M. J. Young, J. Conington, and G. Simm. "Genetic relationships between seasonal tissue levels in Scottish Blackface ewes and lamb growth traits." Animal Science 81, no. 1 (2005): 11–21. http://dx.doi.org/10.1079/asc41670011.

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AbstractScottish Blackface ewes (no. = 308) were scanned four times per year using X-ray computed tomography (CT scanning) (pre-mating, pre-lambing, mid lactation and weaning), from 18 months to 5 years of age, giving a maximum of 16 scanning events per ewe. Total weights of carcass fat, internal fat and carcass muscle were estimated from the CT images at each scanning event. Lambs produced by these ewes were weighed at birth, mid lactation and weaning to calculate litter growth traits: litter birth weight; litter weight gain from birth until mid lactation; and litter weight gain from birth un

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