| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Gado de Leite. |
|
Data corrente: |
12/08/2021 |
|
Data da última atualização: |
15/09/2021 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
VALOTE, P. D.; CARVALHO, C. A. B. de; FREITAS, C. A. S.; MORENZ, M. J. F.; PACIULLO, D. S. C.; GOMIDE, C. A. de M. |
|
Afiliação: |
PRISCILA DORNELAS VALOTE, Universidade Federal Rural do Rio de Janeiro; CARLOS AUGUSTO BRANDÃO DE CARVALHO, Universidade Federal Rural do Rio de Janeiro; CÁSSIA APARECIDA SOARES FREITAS, Universidade Federal de Viçosa; MIRTON JOSE FROTA MORENZ, CNPGL; DOMINGOS SAVIO CAMPOS PACIULLO, CNPGL; CARLOS AUGUSTO DE MIRANDA GOMIDE, CNPGL. |
|
Título: |
Forage mass and canopy structure of Zuri and Quênia guineagrasses pasture under rotational stocking. |
|
Ano de publicação: |
2021 |
|
Fonte/Imprenta: |
Revista Brasileira de Zootecnia, v. 50, e20200225, 2021. |
|
DOI: |
https://doi.org/10.37496/rbz5020200225 |
|
Idioma: |
Inglês |
|
Conteúdo: |
This work evaluated the productive and structural characteristics of the BRS Zuri and BRS Quênia cultivars under rotational stocking management. The evaluations were divided into five periods according to rainfall regime (high, medium, and low rainfall) during 16 months of the years 2016-2018. Pastures were grazed when canopies intercepted 95% of incident light to stubbles corresponding to 50% of the pre-grazing height. The pre- and post-grazing heights varied as a function of cultivar, with higher values for BRS Zuri (89 and 49 cm) than for BRS Quênia (78 and 45 cm). No differences in canopy lowering percentage, forage mass, and stem and dead material dry masses between cultivars were observed, with averages of 41.3%, 5,856, 1,835, and 841 kg ha?1, respectively. The post-grazing canopy height was lower in the second year, which resulted in higher values of canopy lowering percentage (51%). The highest value for leaf:stem ratio for both cultivars was observed in the high rainfall period of the second year. Higher average tiller population density was observed for BRS Quênia (477 tillers m?2) than for BRS Zuri (260 tillers m?2) for all the rainfall periods. Forage bulk density was similar between cultivars and varied according to the periods evaluated, with the highest value observed during the dry period of the year. Forage mass, as well as its component fractions, did not vary between cultivars, but was influenced by the studied periods. The cultivars showed high leaf mass in the pre-grazing forage mass with an average value of 3,174 kg ha?1. The cultivars are similar in morphological composition and offer high yield potential when managed under a rotational grazing system. MenosThis work evaluated the productive and structural characteristics of the BRS Zuri and BRS Quênia cultivars under rotational stocking management. The evaluations were divided into five periods according to rainfall regime (high, medium, and low rainfall) during 16 months of the years 2016-2018. Pastures were grazed when canopies intercepted 95% of incident light to stubbles corresponding to 50% of the pre-grazing height. The pre- and post-grazing heights varied as a function of cultivar, with higher values for BRS Zuri (89 and 49 cm) than for BRS Quênia (78 and 45 cm). No differences in canopy lowering percentage, forage mass, and stem and dead material dry masses between cultivars were observed, with averages of 41.3%, 5,856, 1,835, and 841 kg ha?1, respectively. The post-grazing canopy height was lower in the second year, which resulted in higher values of canopy lowering percentage (51%). The highest value for leaf:stem ratio for both cultivars was observed in the high rainfall period of the second year. Higher average tiller population density was observed for BRS Quênia (477 tillers m?2) than for BRS Zuri (260 tillers m?2) for all the rainfall periods. Forage bulk density was similar between cultivars and varied according to the periods evaluated, with the highest value observed during the dry period of the year. Forage mass, as well as its component fractions, did not vary between cultivars, but was influenced by the studied periods. The cultivars showed high leaf mass ... Mostrar Tudo |
|
Palavras-Chave: |
BRS Quênia; BRS Zuri; Lotação rotativa. |
|
Thesagro: |
Capim; Forragem; Pastejo Rotativo. |
|
Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/225106/1/Forage-mass.pdf
|
|
Marc: |
LEADER 02514naa a2200265 a 4500
001 2133498
005 2021-09-15
008 2021 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.37496/rbz5020200225$2DOI
100 1 $aVALOTE, P. D.
245 $aForage mass and canopy structure of Zuri and Quênia guineagrasses pasture under rotational stocking.$h[electronic resource]
260 $c2021
520 $aThis work evaluated the productive and structural characteristics of the BRS Zuri and BRS Quênia cultivars under rotational stocking management. The evaluations were divided into five periods according to rainfall regime (high, medium, and low rainfall) during 16 months of the years 2016-2018. Pastures were grazed when canopies intercepted 95% of incident light to stubbles corresponding to 50% of the pre-grazing height. The pre- and post-grazing heights varied as a function of cultivar, with higher values for BRS Zuri (89 and 49 cm) than for BRS Quênia (78 and 45 cm). No differences in canopy lowering percentage, forage mass, and stem and dead material dry masses between cultivars were observed, with averages of 41.3%, 5,856, 1,835, and 841 kg ha?1, respectively. The post-grazing canopy height was lower in the second year, which resulted in higher values of canopy lowering percentage (51%). The highest value for leaf:stem ratio for both cultivars was observed in the high rainfall period of the second year. Higher average tiller population density was observed for BRS Quênia (477 tillers m?2) than for BRS Zuri (260 tillers m?2) for all the rainfall periods. Forage bulk density was similar between cultivars and varied according to the periods evaluated, with the highest value observed during the dry period of the year. Forage mass, as well as its component fractions, did not vary between cultivars, but was influenced by the studied periods. The cultivars showed high leaf mass in the pre-grazing forage mass with an average value of 3,174 kg ha?1. The cultivars are similar in morphological composition and offer high yield potential when managed under a rotational grazing system.
650 $aCapim
650 $aForragem
650 $aPastejo Rotativo
653 $aBRS Quênia
653 $aBRS Zuri
653 $aLotação rotativa
700 1 $aCARVALHO, C. A. B. de
700 1 $aFREITAS, C. A. S.
700 1 $aMORENZ, M. J. F.
700 1 $aPACIULLO, D. S. C.
700 1 $aGOMIDE, C. A. de M.
773 $tRevista Brasileira de Zootecnia$gv. 50, e20200225, 2021.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Gado de Leite (CNPGL) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
Registro Completo
|
Biblioteca(s): |
Embrapa Pesca e Aquicultura. |
|
Data corrente: |
17/01/2024 |
|
Data da última atualização: |
20/01/2024 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Circulação/Nível: |
B - 2 |
|
Autoria: |
TORATI, L. S.; LOPES, J. T.; LIMA, A. F.; PUVANENDRAN, V.; BATLOUNI, S. R.; KIRSCHNIK, L. N. G. |
|
Afiliação: |
LUCAS SIMON TORATI, CNPASA; JULIA T. LOPES, IFTO, Pedro Afonso-TO; ADRIANA FERREIRA LIMA, CNPASA; VELMURUGU PUVANENDRAN, CENTER FOR MARINE AQUACULTURE & PRODUCTION BIOLOGY, Norway; SERGIO R. BATLOUNI, UNESP, Jaboticabal-SP; LUCIANA NAKAGHI GANECO KIRSCHNIK, CNPASA. |
|
Título: |
Feasibility of In Vivo semen collection and description of the morphology and ultrastructure of the spermatozoa of Arapaima gigas (Schinz, 1822). |
|
Ano de publicação: |
2024 |
|
Fonte/Imprenta: |
Fishes, v. 9, 24, 2024. |
|
ISSN: |
2410-3888 |
|
DOI: |
https://doi.org/10.3390/fishes9010024 |
|
Idioma: |
Inglês |
|
Conteúdo: |
The pirarucu, Arapaima gigas, is an emblematic endangered Amazon osteoglossid with high potential for aquaculture development. In this study, we report the in vivo collection of semen from pirarucu for the first-time and a complete description of the spermatozoa ultrastructure using scanning and transmission electron microscopy (SEM and TEM). The spermatozoon of pirarucu is biflagellate with no acrosomal cell, comprising a spherical head (8.26 ± 2.19 μm2), a short intermediate piece region and two long flagella (68.34 ± 5.69 μm). The nucleus is spherical and electron-dense, and at its base, there are two nuclear fossae where the centrioles are found. The anterior part of the flagellum is positioned at the lateral base of the nucleus, forming an intermediate piece. Lateral to the intermediate piece, an abundant number of mitochondria are present and occupy most of the cytoplasmic volume. The two flagella were found with a 9 + 2 axonemal structure (nine peripheral doublets and two central microtubules). The central microtubules are aligned with two side fins formed laterally by the axoneme plasma membrane. Side fins were observed from the anterior region to the posterior end. The results show that the spermatozoa of A. gigas are biflagellate, mitochondria-rich and robust, corroborating the external fertilization characteristic of the species. The novel description of sperm morphology presented herein will contribute to advancing the knowledge of and aiding future research on the reproductive biology of this species. MenosThe pirarucu, Arapaima gigas, is an emblematic endangered Amazon osteoglossid with high potential for aquaculture development. In this study, we report the in vivo collection of semen from pirarucu for the first-time and a complete description of the spermatozoa ultrastructure using scanning and transmission electron microscopy (SEM and TEM). The spermatozoon of pirarucu is biflagellate with no acrosomal cell, comprising a spherical head (8.26 ± 2.19 μm2), a short intermediate piece region and two long flagella (68.34 ± 5.69 μm). The nucleus is spherical and electron-dense, and at its base, there are two nuclear fossae where the centrioles are found. The anterior part of the flagellum is positioned at the lateral base of the nucleus, forming an intermediate piece. Lateral to the intermediate piece, an abundant number of mitochondria are present and occupy most of the cytoplasmic volume. The two flagella were found with a 9 + 2 axonemal structure (nine peripheral doublets and two central microtubules). The central microtubules are aligned with two side fins formed laterally by the axoneme plasma membrane. Side fins were observed from the anterior region to the posterior end. The results show that the spermatozoa of A. gigas are biflagellate, mitochondria-rich and robust, corroborating the external fertilization characteristic of the species. The novel description of sperm morphology presented herein will contribute to advancing the knowledge of and aiding future research on t... Mostrar Tudo |
|
Thesagro: |
Espermatozóide; Morfologia Animal; Peixe; Pirarucu; Reprodução Animal. |
|
Thesaurus NAL: |
Arapaima gigas; Osteoglossidae; Reproduction; Spermatozoa; Ultrastructure. |
|
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1160896/1/fishes-2024.pdf
|
|
Marc: |
LEADER 02499naa a2200325 a 4500
001 2160896
005 2024-01-20
008 2024 bl uuuu u00u1 u #d
022 $a2410-3888
024 7 $ahttps://doi.org/10.3390/fishes9010024$2DOI
100 1 $aTORATI, L. S.
245 $aFeasibility of In Vivo semen collection and description of the morphology and ultrastructure of the spermatozoa of Arapaima gigas (Schinz, 1822).$h[electronic resource]
260 $c2024
520 $aThe pirarucu, Arapaima gigas, is an emblematic endangered Amazon osteoglossid with high potential for aquaculture development. In this study, we report the in vivo collection of semen from pirarucu for the first-time and a complete description of the spermatozoa ultrastructure using scanning and transmission electron microscopy (SEM and TEM). The spermatozoon of pirarucu is biflagellate with no acrosomal cell, comprising a spherical head (8.26 ± 2.19 μm2), a short intermediate piece region and two long flagella (68.34 ± 5.69 μm). The nucleus is spherical and electron-dense, and at its base, there are two nuclear fossae where the centrioles are found. The anterior part of the flagellum is positioned at the lateral base of the nucleus, forming an intermediate piece. Lateral to the intermediate piece, an abundant number of mitochondria are present and occupy most of the cytoplasmic volume. The two flagella were found with a 9 + 2 axonemal structure (nine peripheral doublets and two central microtubules). The central microtubules are aligned with two side fins formed laterally by the axoneme plasma membrane. Side fins were observed from the anterior region to the posterior end. The results show that the spermatozoa of A. gigas are biflagellate, mitochondria-rich and robust, corroborating the external fertilization characteristic of the species. The novel description of sperm morphology presented herein will contribute to advancing the knowledge of and aiding future research on the reproductive biology of this species.
650 $aArapaima gigas
650 $aOsteoglossidae
650 $aReproduction
650 $aSpermatozoa
650 $aUltrastructure
650 $aEspermatozóide
650 $aMorfologia Animal
650 $aPeixe
650 $aPirarucu
650 $aReprodução Animal
700 1 $aLOPES, J. T.
700 1 $aLIMA, A. F.
700 1 $aPUVANENDRAN, V.
700 1 $aBATLOUNI, S. R.
700 1 $aKIRSCHNIK, L. N. G.
773 $tFishes$gv. 9, 24, 2024.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Pesca e Aquicultura (CNPASA) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Expressão de busca inválida. Verifique!!! |
|
|
