This study aimed to evaluate the effect of the litter size (LS) category on the reproductive performance of nulliparous (NP) and second-parous (SP) NZW rabbits and the performance of their offspring. A total of 39 NP and 33 SP doe rabbits were divided into low (LLS, <7) and high (HLS, ≥7) after parturition. Reproductive measurements of each LS category and doe type were determined. The results show LS of 3-8 and 4-10 NP and SP, respectively. Doe rabbits with 6 LS show the highest distribution. Doe body weight at mating and from mating to parturition was higher (P<0.0001) for HLS than LLS, and SP than NP. Kit weight at birth and weaning, LS and viability were higher in HLS than in LLS does. At weaning, LS was higher (P<0.0001) in SP than NP. Levels of P4 at mid-pregnancy (P<0.001) were higher in HLS than in LLS, and in SP than in NP. In conclusion, a high litter size category (≥7/doe) was obtained from heavier NP or SP doe rabbits (LBW around 3 kg) and from second-parous compared with nulliparous does, with near similarity in conception rate of does. Weight and viability rate at birth and weaning as well as plasma progesterone level at mid-pregnancy were higher for does with high than low litter size category. In conclusion, body weight and parity may have a significant role in improving the litter size of doe rabbits, which may be useful in breeding and managerial programs to increase the economic value of rabbit production.
| Published in | Advances in Applied Physiology (Volume 7, Issue 2) |
| DOI | 10.11648/j.aap.20220702.13 |
| Page(s) | 34-41 |
| Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
| Copyright |
Copyright © The Author(s), 2022. Published by Science Publishing Group |
Litter Size, Progesterone, Pregnancy, Rabbit, Viability
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APA Style
Mohamed Abdel-Fatah Abo-Farw, Wael Mohamed Nagy, Sherief Mohamed Zayed, George Ezaat Younan, Rehab Fawzy Ismail. (2022). Productivity and Progesterone Profile of Nulliparous and Second-Parous Rabbits Characterized by Low and High Litter Size. Advances in Applied Physiology, 7(2), 34-41. https://doi.org/10.11648/j.aap.20220702.13
ACS Style
Mohamed Abdel-Fatah Abo-Farw; Wael Mohamed Nagy; Sherief Mohamed Zayed; George Ezaat Younan; Rehab Fawzy Ismail. Productivity and Progesterone Profile of Nulliparous and Second-Parous Rabbits Characterized by Low and High Litter Size. Adv. Appl. Physiol. 2022, 7(2), 34-41. doi: 10.11648/j.aap.20220702.13
AMA Style
Mohamed Abdel-Fatah Abo-Farw, Wael Mohamed Nagy, Sherief Mohamed Zayed, George Ezaat Younan, Rehab Fawzy Ismail. Productivity and Progesterone Profile of Nulliparous and Second-Parous Rabbits Characterized by Low and High Litter Size. Adv Appl Physiol. 2022;7(2):34-41. doi: 10.11648/j.aap.20220702.13
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author = {Mohamed Abdel-Fatah Abo-Farw and Wael Mohamed Nagy and Sherief Mohamed Zayed and George Ezaat Younan and Rehab Fawzy Ismail},
title = {Productivity and Progesterone Profile of Nulliparous and Second-Parous Rabbits Characterized by Low and High Litter Size},
journal = {Advances in Applied Physiology},
volume = {7},
number = {2},
pages = {34-41},
doi = {10.11648/j.aap.20220702.13},
url = {https://doi.org/10.11648/j.aap.20220702.13},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.aap.20220702.13},
abstract = {This study aimed to evaluate the effect of the litter size (LS) category on the reproductive performance of nulliparous (NP) and second-parous (SP) NZW rabbits and the performance of their offspring. A total of 39 NP and 33 SP doe rabbits were divided into low (LLS, <7) and high (HLS, ≥7) after parturition. Reproductive measurements of each LS category and doe type were determined. The results show LS of 3-8 and 4-10 NP and SP, respectively. Doe rabbits with 6 LS show the highest distribution. Doe body weight at mating and from mating to parturition was higher (P<0.0001) for HLS than LLS, and SP than NP. Kit weight at birth and weaning, LS and viability were higher in HLS than in LLS does. At weaning, LS was higher (P<0.0001) in SP than NP. Levels of P4 at mid-pregnancy (P<0.001) were higher in HLS than in LLS, and in SP than in NP. In conclusion, a high litter size category (≥7/doe) was obtained from heavier NP or SP doe rabbits (LBW around 3 kg) and from second-parous compared with nulliparous does, with near similarity in conception rate of does. Weight and viability rate at birth and weaning as well as plasma progesterone level at mid-pregnancy were higher for does with high than low litter size category. In conclusion, body weight and parity may have a significant role in improving the litter size of doe rabbits, which may be useful in breeding and managerial programs to increase the economic value of rabbit production.},
year = {2022}
}
TY - JOUR T1 - Productivity and Progesterone Profile of Nulliparous and Second-Parous Rabbits Characterized by Low and High Litter Size AU - Mohamed Abdel-Fatah Abo-Farw AU - Wael Mohamed Nagy AU - Sherief Mohamed Zayed AU - George Ezaat Younan AU - Rehab Fawzy Ismail Y1 - 2022/11/10 PY - 2022 N1 - https://doi.org/10.11648/j.aap.20220702.13 DO - 10.11648/j.aap.20220702.13 T2 - Advances in Applied Physiology JF - Advances in Applied Physiology JO - Advances in Applied Physiology SP - 34 EP - 41 PB - Science Publishing Group SN - 2471-9714 UR - https://doi.org/10.11648/j.aap.20220702.13 AB - This study aimed to evaluate the effect of the litter size (LS) category on the reproductive performance of nulliparous (NP) and second-parous (SP) NZW rabbits and the performance of their offspring. A total of 39 NP and 33 SP doe rabbits were divided into low (LLS, <7) and high (HLS, ≥7) after parturition. Reproductive measurements of each LS category and doe type were determined. The results show LS of 3-8 and 4-10 NP and SP, respectively. Doe rabbits with 6 LS show the highest distribution. Doe body weight at mating and from mating to parturition was higher (P<0.0001) for HLS than LLS, and SP than NP. Kit weight at birth and weaning, LS and viability were higher in HLS than in LLS does. At weaning, LS was higher (P<0.0001) in SP than NP. Levels of P4 at mid-pregnancy (P<0.001) were higher in HLS than in LLS, and in SP than in NP. In conclusion, a high litter size category (≥7/doe) was obtained from heavier NP or SP doe rabbits (LBW around 3 kg) and from second-parous compared with nulliparous does, with near similarity in conception rate of does. Weight and viability rate at birth and weaning as well as plasma progesterone level at mid-pregnancy were higher for does with high than low litter size category. In conclusion, body weight and parity may have a significant role in improving the litter size of doe rabbits, which may be useful in breeding and managerial programs to increase the economic value of rabbit production. VL - 7 IS - 2 ER -
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