NEOTROPICAL XENARTHRANS: a data set of occurrence of xenarthran species in the Neotropics

Xenarthrans – anteaters, sloths, and armadillos – have essential functions for ecosystem maintenance, such as insect control and nutrient cycling, playing key roles as ecosystem engineers. Because of habitat loss and fragmentation, hunting pressure, and conflicts with 24 domestic dogs, these species have been threatened locally, regionally, or even across their full distribution ranges. The Neotropics harbor 21 species of armadillos, ten anteaters, and six sloths. Our dataset includes the families Chlamyphoridae (13), Dasypodidae (7), Myrmecophagidae (3), Bradypodidae (4), and Megalonychidae (2). We have no occurrence data on Dasypus pilosus (Dasypodidae). Regarding Cyclopedidae, until recently, only one species was recognized, but new genetic studies have revealed that the group is represented by seven species. In this data-paper, we compiled a total of 42,528 records of 31 species, represented by occurrence and quantitative data, totaling 24,847 unique georeferenced records. The geographic range is from the south of the USA, Mexico, and Caribbean countries at the northern portion of the Neotropics, to its austral distribution in Argentina, Paraguay, Chile, and Uruguay. Regarding anteaters, Myrmecophaga tridactyla has the most records (n=5,941), and Cyclopes sp. has the fewest (n=240). The armadillo species with the most data is Dasypus novemcinctus (n=11,588), and the least recorded for Calyptophractus retusus (n=33). With regards to sloth species, Bradypus variegatus has the most records (n=962), and Bradypus pygmaeus has the fewest (n=12). Our main objective with Neotropical Xenarthrans is to make occurrence and quantitative data available to facilitate more ecological research, particularly if we integrate the xenarthran data with other datasets of Neotropical Series which will become available very soon (i.e. Neotropical Carnivores, Neotropical Invasive Mammals, and Neotropical Hunters and Dogs). Therefore, studies on trophic cascades, hunting pressure, habitat loss, fragmentation effects, species invasion, and climate change effects will be possible with the Neotropical Xenarthrans dataset

Estimacao de parametros geneticos em seringueira sem o emprego de testes de progenies.

O presente trabalho teve como principal objetivo a estimativa de parametros geneticos, sem se utilizar teste de progenies, em viveiro de seringueira (Hevea spp) de um ano de idade. Foram calculadas as estimativas da variancia genetica (O2g), variancia ambiental O2e), e herdabilidade no sentido amplo (h2), variancia residual e os valores do coeficientes b, utilizando os caracteres de altura de plantas, diametro do caule, numero de lancamentos e producao de borracha seca. As estimativas obtidas de h2 foram consideradas altas em relacao aos metodos usuais, talvez, em decorrencia da presenca de correlacoes nao isoladas. No entanto podem ser usadas em programas de melhoramento genetico, em virtude da aplicacao pratica a ser desejavel a obtencao de estimativas em estadio precoce de desenvolvimento de genotipos. A metodologia empregada e de especial importancia quando especies florestais estao sendo utilizadas, em face dos demorados testes de progenies.Made available in DSpace on 2014-11-27T08:14:24Z (GMT). No. of bitstreams: 1 14880659731SM.pdf: 297999 bytes, checksum: e3580225adc091c8c4a8b9b038039eff (MD5) Previous issue date: 2014-02-03198

Progeny test of early Hevea hybrids for producing rapid-growing and high-yielding ortets.

An assessment was made of a twelve-month old nursery progeny test of Hevea hybrids in order to select and recombine the high latex-yielding Hevea trees which had a rapid growth rate. The plant materials grown for the study included open-pollinated progenies, progenies of F1 backcrossed to primary clones of H. brasiliensis, progenies of F1 hybrids crossed with F1 hybrids and progenies of open-pollinated H. brasiliensis used as control. A number of characteristics such as yield of dry rubber per tapping by Mendes early test, plant height and stem diammeterwere assessed. The preliminary results showed that the progeny of selected F1 wind-pollinated hybrids (illegimate) was significantly faster in growth compared with progeny of primary clones of H. brasiliensis similarly open-pollinated

Metodos de estimacao do coeficiente de repetibilidade no melhoramento da seringueira.

Foram testados varios metodos de estimacao dos coeficientes de repetibilidade, bem como determinacao do numero adequado de minitestes de producao na selecao de plantulas de seringueira (Hevea sp.) em viveiro. Foram utilizados tres minitestes em plantulas oriundas de poliniacao aberta do clone RRIM 600, e estimados os coeficientes de repetibilidade, considerando-se os metodos da analise de variancia e componentes principais, segundo metodologia apresentada por Mansour et al.(1981). A equacao que relaciona os tres minitestes de producao explicou cerca de 87% da variacao existente entre os testes. Nao foram detectadas grandes diferencas nas estimativas do coeficiente de repetibilidade entre os processos testados, optando-se por ANOVA, por ser de uso mais facil.Made available in DSpace on 2015-04-03T05:00:06Z (GMT). No. of bitstreams: 1 15206673531SM.pdf: 236637 bytes, checksum: 4086df1d81baa6f84161cb7cda9e9483 (MD5) Previous issue date: 1996-11-26198

Progeny test of early Hevea hybrids for producing rapid-growing and high-yielding ortets.

An assessment was made of a twelve-month old nursery progeny test of Hevea hybrids in order to select and recombine the high latex-yielding Hevea trees which had a rapid growth rate. The plant materials grown for the study included open-pollinated progenies, progenies of F1 backcrossed to primary clones of H. brasiliensis, progenies of F1 hybrids crossed with F1 hybrids and progenies of open-pollinated H. brasiliensis used as control. A number of characteristics such as yield of dry rubber per tapping by Mendes early test, plant height and stem diammeterwere assessed. The preliminary results showed that the progeny of selected F1 wind-pollinated hybrids (illegimate) was significantly faster in growth compared with progeny of primary clones of H. brasiliensis similarly open-pollinated.Made available in DSpace on 2015-08-13T07:22:47Z (GMT). No. of bitstreams: 1 p.319327.pdf: 4137086 bytes, checksum: 231d15aa3ce9c47a11640a9b4d49a470 (MD5) Previous issue date: 1996-11-27198