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| Registros recuperados: 160 | |
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| Quiroz, J.C.; Montenegro, C.; Báez, P.; Espíndola, F.. |
| Se reportan las actividades y resultados del proyecto FIP 2005-41 “Dinámica y estructura poblacional del langostino colorado III y IV Regiones”. Para abordar el estudio de la dinámica y estructura poblacional de P. monodon, se plantearon dos hipótesis. Una postula que la especie posee una estructura poblacional a lo largo de la plataforma continental, en un gradiente latitudinal, en tanto que la otra plantea que la especie tiene una estructura poblacional a través de la plataforma continental, en un gradiente longitudinal. Para someter a pruebas estas hipótesis se realizaron varios análisis estadísticos de variables fundamentales del stock, como la densidad, los tamaños corporales, las edades y componentes del stock en función de su madurez. Los... |
| Tipo: Report |
Palavras-chave: Population dynamics; Population structure; Size distribution; Spawning populations; Statistical models; Marine crustaceans; Population structure; Population dynamics; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_6111. |
| Ano: 2006 |
URL: http://hdl.handle.net/1834/1505 |
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| Wöhler, O.C.; Giussi, A.R.; García de la Rosa, S.B.; Sánchez, M.F.; Hansen, J.E.; Cordo, H.D.; Alvarez Colombo, G.L.; Incorvaia, I.S.; Reta, R.; Abachián, V.E.. |
| An assessment survey on the austral fish was carried out during the summer 1997 on both the shelf and slope off southern Argentina. The cruise covered 101,508 nm2 between 45° and 54° 30'S and depths between 50 and 400 m. The survey did not include the area controlled by the United Kingdom. Considering the total area as an undivided stratum, a random sampling was used to estimate demersal fish biomass and a delta distribution-based model to evaluate mean densities. Out of the forty five species caught 28 were bony fish and 17 elasmobranch. Four cephalopod mollusc species were also identified. A biomass of 3.2 million tons (CI(95o/o): 1.90 - 6.06 millions) proved that longtail hake was the most abundant resource within the region followed by common hake... |
| Tipo: Journal Contribution |
Palavras-chave: Demersal fisheries; Fishery surveys; Biomass; Population structure; Feeding; Parasitism; Environmental conditions. |
| Ano: 1999 |
URL: http://hdl.handle.net/1834/5782 |
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| Oliveira,Rejane Rodrigues de; Egito,Andréa Alves do; Ribeiro,Maria Norma; Paiva,Samuel Rezende; Albuquerque,Maria do Socorro Maués; Castro,Silvia Ribeiro; Mariante,Arthur da Silva; Adrião,Manuel. |
| The objective of this study was to verify the genetic diversity between and within seven populations of Moxotó goat (n = 264) from the States of Pernambuco, Paraíba and Rio Grande do Norte, using RAPD (Random Amplified Polymorphic DNA). Moxotó, as well as other naturalized breeds, suffers genetic losses due to the indiscriminate miscegenation with breeds raised in the Northeast Region of Brazil. The genetic characterization of these genetic resources is essential to conservation and breeding programs. DNA was extracted from lymphocytes using a non-organic protocol. The 16 primers used were selected from 120 decamer oligonucleotide primers and generated 56 polymorphic bands. The analysis of molecular variance (AMOVA) showed that the greater part of total... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Capra hircus; Native breeds; Population structure; Conservation genetics. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2005000300006 |
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| Brbaklić,Ljiljana; Trkulja,Dragana; Kondić-Špika,Ankica; Hristov,Nikola; Denčić,Srbislav; Mikić,Sanja; Tomičić,Marina; Kobiljski,Borislav. |
| The objective of this work was to assess the genetic diversity and population structure of wheat genotypes, to detect significant and stable genetic associations, as well as to evaluate the efficiency of statistical models to identify chromosome regions responsible for the expression of spike-related traits. Eight important spike characteristics were measured during five growing seasons in Serbia. A set of 30 microsatellite markers positioned near important agronomic loci was used to evaluate genetic diversity, resulting in a total of 349 alleles. The marker-trait associations were analyzed using the general linear and mixed linear models. The results obtained for number of allelic variants per locus (11.5), average polymorphic information content value... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Triticum aestivum; Genetic resources; Microsatellites; Population structure; Spike-related traits.. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2015000200149 |
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| THUROW,LIANE BAHR; RASEIRA,MARIA DO CARMO BASSOLS; BONOW,SANDRO; ARGE,LUIS WILLIAN PACHECO; CASTRO,CAROLINE MARQUES. |
| ABSTRACT Peach has great economic and social importance in Brazil. Diverse sources of germplasm were used to introduce desirable traits in the Brazilian peach breeding pool, composed mainly by local selections and accessions selected from populations developed by the national breeding programs, adapted to subtropical climate, with low chill requirement, as well as accessions introduced from several countries. In this research, we used SSR markers, selected by their high level of polymorphism, to access genetic diversity and population structure of a set composed by 204 peach selected genotypes, based on contrasting phenotypes for valuable traits in peach breeding. A total of 80 alleles were obtained, giving an average of eight alleles per locus. In... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Prunus persica; Genetic diversity; Population structure; Low chill germplasm; Genetic resources. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452017000500802 |
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| Gregati,Rafael A.; Negreiros-Fransozo,Maria L.. |
| The population biology of the burrowing crab Neohelice granulata (Dana, 1851) from a mangrove in Jabaquara Beach, Paraty, state of Rio de Janeiro, Brazil (23º13'04"S and 44º42'47"W), was studied with respect to the following traits: size-frequency distribution, recruitment, reproductive period, fecundity, and sex ratio. Specimens were sampled monthly from April, 2003 to March, 2004, at the river margins during low tide periods. Size, sex, presence of eggs, and stage of the female gonad were recorded. Ovigerous females had their eggs removed and counted. The reproductive period was continuous and the highest frequency of ovigerous females was recorded in the fall and winter. Mature gonads were found throughout the year and recruitment was continuous but... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Grapsoidea; Population structure; Semiterrestrial crab. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702009000100006 |
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| Rondineli,Giulianna; Carmassi,Alberto Luciano; Braga,Francisco Manoel de Souza. |
| Taunayia bifasciata (Eigenmann & Norris, 1900) is a small catfish that inhabits headwater streams of the Tietê and Paraíba do Sul river basins, southeastern Brazil, being restricted to the Atlantic rain forest. The species is found on lists of threatened species of Brazil and the state of São Paulo. Despite that, there is no literature information about the biology of the species. In the present study we endeavored to collect data on the biology of T. bifasciata. A total of 37 specimens were captured in two streams, Piracuama and Oliveiras. Of those, 22 were females, 14 were males and 1 specimen was immature. Adults with mature gonads were captured in all samples excepting the last, suggesting that T. bifasciata has a long reproductive season. The... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Diet; Fecundity; Population structure; Reproductive season; Eastern Serra da Mantiqueira. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000400018 |
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| Oliveira,Aracele Prates de; Malhado,Carlos Henrique Mendes; Carneiro,Paulo Luiz Souza; Martins Filho,Raimundo; Silveira,Éderson Silva; Souza,Laaina de Andrade; Muniz,Lorena Mirelle Santos; Azevêdo,Danielle Maria Machado Ribeiro. |
| The objective of this study was to characterize the population genetic structure of the Gir breed in the Northeast of Brazil. The data used in this study were taken from pedigree information of 8,897 Gir animals between 1957 and 2007, obtained from the Brazilian Zebu Breeders Association (ABCZ). The program ENDOG was used to estimate the parameters based on the probability gene origin. From the amount of the studied animals, 67.22%, 18.41% and 3.15% had complete pedigree only on the first, second and third parentage, respectively. The number of ancestors that contributed for the reference population was 2,755, of which only 171 explain the 50% genetic variability of the population. The actual number of founder herds was 168 and the effective number of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ancestry; Inbreeding; Population structure. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000500011 |
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| Fransozo,Vivian; Costa,Rogério C.; Bertini,Giovana; Cobo,Valter J.. |
| The population biology of Exhippolysmata oplophoroides (Holthuis, 1948) was studied in Ubatuba Bay (23º26'S, 45º02'W), Ubatuba, São Paulo, Brazil, from September/1995 to August/1996. Each sampling comprised eight transects (14 000 m² each), sampled monthly with three repetitions. The specimens were classified with respect to the presence or absence of eggs in the abdominal appendages. Spine-shrimps occurred only on six transects, being most abundant on transect II, with the highest incidence in late spring and throughout the summer months. Ovigerous and non-ovigerous shrimps were present year-round, in an approximately similar proportion (1:1). Site II in Ubatuba Bay is characterized by high salinity and oxygen values, temperature between 26 and 29ºC, low... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Distribution; Population structure; Reproduction; Southeastern Brazil; Spine shrimp. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752005000400037 |
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| Branco,Joaquim Olinto; Lunardon-Branco,Maria José; Souto,Flávio Xavier. |
| Portunus spinimanus Latreille, 1819 is one abundant Portunidae speeies whieh are eaught by sea-bob-shrimps artisanal fishery in Armaçãodo Itapoeoroy,Penha, Santa Catarina, Brazil. Aiming to analyze its population strueture, a total of 995 males and 1925 fernaleswere eollected by means of overtrawl frorn January to Decernber 1995, between the depthsof 610 10meters,in lhe periodsof morning,afternoonand evening. The width variation of lhe carapaee ranged írom 3.0 to 14.0 em in the males and 3.0 to 11.0emin females. The species presents growth isometric and the males reach width and weight assintoticand bigger that lhe females.The estirnatedfirst maturation width was between 6.8 and 7.6 em, reached with lhe approxirnated age of 15 months. The artisanal fishery... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Portunus spinimanus; Population structure; Artisanal fishery. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752002000300010 |
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| Registros recuperados: 160 | |
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