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Sexual Dimorphism and Female reproductive characteristics of Rana guentheri

Agricultural Biotechnology 2016年第3期5卷 9-12页

作者： Zhiqiang YE Wenhua LIU Yuxia JIANG Dade XU College of Life Sciences Zhaoqing University

[ Objective ] This paper aimed to study the sexual dimorphism of Rana guentheri. [ Method ] Sixty-seven Rana guentheri were collected in Zhaoqing ar- ea to measure their morphological indexes, count the brood amount of female Rana guentheri and study sexual dimorphism and female reproductive characteristics . [Result] The average snout-vent length of male Rana guentheri was （75.07 ± 1.21 ） mm and the average snout-vent length of female Rana guentheri was （78.67 ± 1.23 ） mm. The snout-vent length and weight of female Rana guentheri were significantly different from that of male Rana guentheri, which illustrated that snout-vent length and body weight of Rana gttentheri had significant sexual dimorphism. The sexual dimorphism index was 0.05. The Local morphological inde- xes of Rana guentheri were positively related with the snout-vent length. The average brood amount of female Rana guentheri was 4 916. The snout-vent length and body weight were positively related with the brood amount of female Rana guentheri. [ Conclusion] Rana guentheri in Zhaoqing area had obvious sexual dimor- phism.

关键词： Rana guentheri Sexual dimorphism reproductive characteristics Brood amount

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The reproductive characteristics and Allocation of an Invasive Weed Eupatorium odoratum in Karst Rocky Mountain of Guangxi

The Reproductive Characteristics and Allocation of an Invasi...

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第三届全国生物入侵大会

作者： Chun-qiang Wei~1,Ming-chao Liu~(1,2),Yan-xi Cen~(1,2),Sai-chun Tang~(1*),Yu-mei Pan~1,Gao-zhong Pu~1 1 Guangxi Institute of Botany,Guangxi Zhuang Autonomous Region and Chinese Academy of sciences, Guilin 541006,China 2 College of Life Sciences,Guangxi Normal University,Gulin 541004,China

Eupatorium odoratum is a noxious weed *** has been invading the karst region of Guangxi,China for many *** order to understand the invasiveness of Eupatorium odoratum in karst region,the reproductive characters in three typical communities including Eupatorium odoratum Community(Dominant community),Vitex negundo-Eupatorium odoratum Community(Mixed community),and Neyraudia reynaudiana-Microstegium vegans Community(Concomitant community) were studied in karst *** results showed that the capitulum number and seed production had significant difference among three communities,which ranged from 520 to 3281 per 1m and 12941 to 74386 per 1m respectively,with the maximum observed in dominant community and the minimum in concomitant *** each capitulum produced 22 to 25 seeds.1000-seed weight ranged from 0.17 to 0.19 *** was a positive correlation between seed production of individual and plant height as well as *** production for per 1m was highly correlated with flowering plants and capitulum number,but was little correlated with ***,Eupatorium odoratum could produce a large number of light *** reproductive allocation of Eupatorium odoratum in three communities ranged from 4.8%to 6.7%,with the maximum found in dominant *** was significant difference in reproductive allocation between dominant community and mixed community. Plant height,density,branch number and total biomass had little influence on reproductive allocation. The reproductive and spread capacity of Eupatorium odoratum in kast rocky mountain was very strong. Moreover,they exhibited difference in different community,which showed different invasiveness.

关键词： Karst rocky mountain Eupatorium odoratum reproductive characteristics Invasiveness

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Effects of improved amino acid balance diet on lysine mammary utilization, whole body protein turnover and muscle protein breakdown on lactating sows

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JOURNAL OF ANIMAL SCIENCE AND BIOTECHNOLOGY 2024年第1期15卷 1-13页

作者： Zhang, Sai Marini, Juan C. Mavangira, Vengai Claude, Andrew Moore, Julie Mohammad, Mahmoud A. Trottier, Nathalie L. Michigan State Univ Dept Anim Sci E Lansing MI 48824 USA Guangdong Acad Agr Sci Minist Agr & Rural Affairs State Key Lab Swine & Poultry Breeding Ind Inst Anim SciKey Lab Anim Nutr & Feed Sci South C Guangzhou 510640 Peoples R China Cornell Univ Dept Anim Sci Frank Morrison Hall507 Tower Rd Ithaca NY 14853 USA Baylor Coll Med USDA ARS Childrens Nutr Res Ctr Houston TX 77030 USA Baylor Coll Med Dept Pediat Pediat Crit Care Med Houston TX 77030 USA Michigan State Univ Dept Large Anim Clin Sci E Lansing MI 48824 USA

Background The study objective was to test the hypothesis that low crude protein (CP) diet with crystalline amino acids (CAA) supplementation improves Lys utilization efficiency for milk production and reduces protein turnover and muscle protein breakdown. Eighteen lactating multiparous Yorkshire sows were allotted to 1 of 2 isocaloric diets (10.80 MJ/kg net energy): control (CON; 19.24% CP) and reduced CP with "optimal" AA profile (OPT; 14.00% CP). Sow body weight and backfat were recorded on d 1 and 21 of lactation and piglets were weighed on d 1, 14, 18, and 21 of lactation. Between d 14 and 18, a subset of 9 sows (CON = 4, OPT = 5) was infused with a mixed solution of 3-[methyl-H-2(3)]histidine (bolus injection) and [C-13]bicarbonate (priming dose) first, then a constant 2-h [C-13]bicarbonate infusion followed by a 6-h primed constant [1-C-13]lysine infusion. Serial blood and milk sampling were performed to determine plasma and milk Lys enrichment, Lys oxidation rate, whole body protein turnover, and muscle protein breakdown. Results Over the 21-d lactation period, compared to CON, sows fed OPT had greater litter growth rate (P < 0.05). Compared to CON, sows fed OPT had greater efficiency of Lys (P < 0.05), Lys mammary flux (P < 0.01) and whole-body protein turnover efficiency (P < 0.05). Compared to CON, sows fed OPT tended to have lower whole body protein breakdown rate (P = 0.069). Muscle protein breakdown rate did not differ between OPT and CON (P = 0.197). Conclusion Feeding an improved AA balance diet increased efficiency of Lys and reduced whole-body protein turnover and protein breakdown. These results imply that the lower maternal N retention observed in lactating sows fed improved AA balance diets in previous studies may be a result of greater partitioning of AA towards milk rather than greater body protein breakdown.

关键词： Amino acid Efficiency Lactating sows Protein breakdown Protein turnover Reduced protein diet NUTRITIONALLY INDUCED RELATIONSHIPS TO-OVULATION INTERVAL 3-METHYLHISTIDINE PRODUCTION reproductive characteristics INSULIN LEVELS EFFICIENCY IMPACT

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Seasonal changes in sperm parameters, testicular histology and circulating levels of reproductive hormones in the male African straw-colored fruit bat (Eidolon helvum)

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Asian pacific Journal of Reproduction 2020年第4期9卷 197-203页

作者： Clifford N Abiaezute Chike F Oguejiofor Innocent C Nwaogu Ikechukwu R Obidike Udensi M Igwebuike Department of Veterinary Anatomy Faculty of Veterinary MedicineUniversity of NigeriaNsukka 410001Nigeria Department of Veterinary Obstetrics and reproductive Diseases Faculty of Veterinary MedicineUniversity of NigeriaNsukka 410001Nigeria Department of Veterinary Physiology and Pharmacology Faculty of Veterinary MedicineUniversity of NigeriaNsukka 410001Nigeria

Objective: To investigate seasonal changes in some reproductive characteristics of the male African straw-colored fruit bat [Eidolon (E.) helvum] in a tropical rain forest area of South-East ***: Spermatozoal characteristics in the testes and cauda epididymides, testicular histology, and the circulating levels of the reproductive hormones, testosterone, follicle stimulating hormone and luteinizing hormone were evaluated in male bats captured in late January (peak dry season), late May (early rainy season) and late September (late rainy season) of 2019. The bats were captured in Obiagu community in Enugu State, South-East Nigeria. Data were analyzed with analysis of variance. Results: There were high serum concentrations of testosterone in early and late rainy season and of luteinizing hormone in early rainy season, but the concentrations of both hormones were low during peak dry season. These hormonal changes corresponded with the testicular seminiferous and spermatogenic activities and testicular and epididymal sperm concentrations, which were also maximal during early and late rainy season but minimal during peak dry season. Epididymal sperm motility and vitality were also high in early and late rainy season but low in peak dry season, while sperm morphological abnormalities were low in early and late rainy season but elevated in peak dry season. There was histological evidence that spermatogenesis did not cease completely during testis regression, but continued at a reduced rate during the dry season. Conclusions: The findings do not support concurrent epididymal sperm storage with testis regression in E. helvum. Altogether, these indicate that seasonal changes significantly alter sperm characteristics, testicular histology and circulating levels of reproductive hormones in E. helvum within the study area.

关键词： Eidolon helvum Spermatozoa reproductive characteristics Seasonal changes

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