Talinopsis frutescens(Anacampserotaceae,a family that is close related to Cactaceae)is a succulent species endemic to North America.The aim of this study was to explore,using Ecological Niche Modeling(ENM),changes in ...Talinopsis frutescens(Anacampserotaceae,a family that is close related to Cactaceae)is a succulent species endemic to North America.The aim of this study was to explore,using Ecological Niche Modeling(ENM),changes in potential distribution ranges considering different climate scenarios:past conditions during the Last Inter Glacial(LIG)and the Last Glacial Maximum(LGM),the present and projections for 2070(RCP 2.6 to 8.5).A pattern of contraction is observed during the LIG,which agrees with other studies focused in species from arid environments.This pattern was followed by a migration towards the south during the LGM and a possible recent expansion to the north as is observed in the present scenario.All future projections show the same contraction and fragmentation patterns,resulting in three discontinuous areas:the northern part of the Chihuahuan Desert,the southern-central part of the Mexican Plateau,and the smallest one in the Tehuacán-Cuicatlán Valley.Our projections for future scenarios agree with other studies and support that global climate change tends to alter the current distribution of arid environment species.展开更多
<span lang="EN-US" style="font-family:;" "="">The domestic cat has been used as a model to carry out comparative research in assisted reproduction, to be applied in wild cats. ...<span lang="EN-US" style="font-family:;" "="">The domestic cat has been used as a model to carry out comparative research in assisted reproduction, to be applied in wild cats. The efficiency in domestic cat IVM concerning </span><span lang="EN-US" style="font-family:;" "="">the </span><span lang="EN-US" style="font-family:;" "="">reproductive status and/or cultivation times has previously been investigated;however, the studies were carried out separately. The objective of this research was to evaluate the maturation of oocytes of domestic cats of different reproductive stages using two different <i>in vitro </i>culture times. The ovaries were obtained by Ooforo-Salpingo-Hysterectomy of cats that were of the following groups: 1) prepubertal, 2) follicular, 3) pregnant or 4) in anestrus. Maturation was carried out with TCM199 medium supplemented with BSA for 24 h and 48 h. On average, 29 ± 25, 20 ± 15, 17 ± 9 and 17 ± 13 oocytes/cat were recovered from the prepubertal follicular, pregnant</span><span lang="EN-US" style="font-family:;" "="">,</span><span lang="EN-US" style="font-family:;" "=""> and anestrus stages, respectively, but did not show a significant difference (<i>P</i></span><span lang="EN-US" style="font-family:;" "=""> ></span><span lang="EN-US"> </span><span lang="EN-US" style="font-family:;" "="">0.05). Also, meiotic maturation did not show a significant difference between the different reproductive stages at 24 h and 48 h, respectively (<i>P</i> > 0.05). However, in the prepubertal and follicular stages, greater oocyte maturation numbers were observed at 48 h compared to 24 h (<i>P</i> < 0.05). In contrast, the aforementioned </span><span lang="EN-US" style="font-family:;" "="">result </span><span lang="EN-US" style="font-family:;" "="">was not observed in the pregnant and anestrus stages (<i>P</i> > 0.05), indicating that the <i>in vitro </i>culture duration is an important factor during <i>in vitro</i> maturation of domestic cat oocytes.</span>展开更多
基金partially funded by the National Council of Science and Technology, Mexico (PhD scholarship 436041)the Cactus and Succulent Society of America grantsupported by the Educational Professional Development Program (#UAA-PTC-169) granted to the corresponding author by the Public Education Department and the Autonomous University of Aguascalientes, Mexico
文摘Talinopsis frutescens(Anacampserotaceae,a family that is close related to Cactaceae)is a succulent species endemic to North America.The aim of this study was to explore,using Ecological Niche Modeling(ENM),changes in potential distribution ranges considering different climate scenarios:past conditions during the Last Inter Glacial(LIG)and the Last Glacial Maximum(LGM),the present and projections for 2070(RCP 2.6 to 8.5).A pattern of contraction is observed during the LIG,which agrees with other studies focused in species from arid environments.This pattern was followed by a migration towards the south during the LGM and a possible recent expansion to the north as is observed in the present scenario.All future projections show the same contraction and fragmentation patterns,resulting in three discontinuous areas:the northern part of the Chihuahuan Desert,the southern-central part of the Mexican Plateau,and the smallest one in the Tehuacán-Cuicatlán Valley.Our projections for future scenarios agree with other studies and support that global climate change tends to alter the current distribution of arid environment species.
文摘<span lang="EN-US" style="font-family:;" "="">The domestic cat has been used as a model to carry out comparative research in assisted reproduction, to be applied in wild cats. The efficiency in domestic cat IVM concerning </span><span lang="EN-US" style="font-family:;" "="">the </span><span lang="EN-US" style="font-family:;" "="">reproductive status and/or cultivation times has previously been investigated;however, the studies were carried out separately. The objective of this research was to evaluate the maturation of oocytes of domestic cats of different reproductive stages using two different <i>in vitro </i>culture times. The ovaries were obtained by Ooforo-Salpingo-Hysterectomy of cats that were of the following groups: 1) prepubertal, 2) follicular, 3) pregnant or 4) in anestrus. Maturation was carried out with TCM199 medium supplemented with BSA for 24 h and 48 h. On average, 29 ± 25, 20 ± 15, 17 ± 9 and 17 ± 13 oocytes/cat were recovered from the prepubertal follicular, pregnant</span><span lang="EN-US" style="font-family:;" "="">,</span><span lang="EN-US" style="font-family:;" "=""> and anestrus stages, respectively, but did not show a significant difference (<i>P</i></span><span lang="EN-US" style="font-family:;" "=""> ></span><span lang="EN-US"> </span><span lang="EN-US" style="font-family:;" "="">0.05). Also, meiotic maturation did not show a significant difference between the different reproductive stages at 24 h and 48 h, respectively (<i>P</i> > 0.05). However, in the prepubertal and follicular stages, greater oocyte maturation numbers were observed at 48 h compared to 24 h (<i>P</i> < 0.05). In contrast, the aforementioned </span><span lang="EN-US" style="font-family:;" "="">result </span><span lang="EN-US" style="font-family:;" "="">was not observed in the pregnant and anestrus stages (<i>P</i> > 0.05), indicating that the <i>in vitro </i>culture duration is an important factor during <i>in vitro</i> maturation of domestic cat oocytes.</span>
