SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

OLIVEIRA,Marcos Sidney Brito; SILVA,Luís Maurício Abdon; PRESTES,Luiza; TAVARES-DIAS,Marcos.

ABSTRACT Length and weight data are useful in fisheries management and standard results of fish monitoring programs. Length-weight relationship (LWR) is used for estimating the weight corresponding to a given length, and the condition factor is used to compare the body condition, fatness or health of fish populations. This study aimed to estimate the LWR and the condition factor for 12 freshwater fish species from the Igarapé Fortaleza basin, a tributary of the Amazonas River system in the State of Amapá, eastern Amazon (Brazil). The coefficient of determination, the allometric condition factor and the allometric coefficient varied among species, and were compared with populations elsewhere. In 83.3% of the species, the allometric coefficient remained...

Tipo: Info:eu-repo/semantics/report

Palavras-chave: Allometry; Brazil; Freshwater fish; Growth pattern.

Ano: 2020

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672020000100008

Close relationship between diameters at 30cm height and at breast height (DBH)

Gehring,Christoph; Park,Soojin; Denich,Manfred.

This paper proposes the establishment of a second diameter measuring standard at 30cm shoot extension ('diam30') as input variable for allometric biomass estimation of small and mid-sized plant shoots. This diameter standard is better suited than the diameter at breast height (DBH, i.e. diameter at 1.30m shoot extension) for adequate characterization of plant dimensions in low bushy vegetation or in primary forest undergrowth. The relationships between both diameter standards are established based on a dataset of 8645 tree, liana and palm shoots in secondary and primary forests of central Amazonia (ranging from 1-150mm dbh). Dbh can be predicted from the diam(30) with high precision, the error introduced by diameter transformation is only 2-3% for trees...

Biomass equations for forest regrowth in the eastern Amazon using randomized branch sampling

Palavras-chave: Allometry; Measuring standard; Amazonia; Biomass estimation; Thin shoots.

Ano: 2008

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672008000100008

Ducey,Mark Jonathan; Zarin,Daniel Jacob; Vasconcelos,Steel Silva; Araújo,Maristela Machado.

Forest regrowth occupies an extensive and increasing area in the Amazon basin, but accurate assessment of the impact of regrowth on carbon and nutrient cycles has been hampered by a paucity of available allometric equations. We develop pooled and species-specific equations for total aboveground biomass for a study site in the eastern Amazon that had been abandoned for 15 years. Field work was conducted using randomized branch sampling, a rapid technique that has seen little use in tropical forests. High consistency of sample paths in randomized branch sampling, as measured by the standard error of individual paths (14%), suggests the method may provide substantial efficiencies when compared to traditional procedures. The best fitting equations in this...

Allometric models to estimate tree height in northern Amazonian ecotone forests

Palavras-chave: Allometry; Allometric equations; Secondary growth; Tropical forest.

Ano: 2009

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672009000200013

BARBOSA,Reinaldo Imbrozio; RAMÍREZ-NARVÁEZ,Perla Natalia; FEARNSIDE,Philip Martin; VILLACORTA,Carlos Darwin Angulo; CARVALHO,Lidiany Camila da Silva.

ABSTRACT Allometric models defining the relationship between stem diameter and total tree height in the Amazon basin are important because they refine the estimates of tree carbon stocks and flow in the region. This study tests different allometric models to estimate the total tree height from the stem diameter in an ecotone zone between ombrophilous and seasonal forests in the Brazilian state of Roraima, in northern Amazonia. Stem diameter and total height were measured directly in 65 recently fallen trees (live or dead). Linear and nonlinear regressions were tested to represent the D:H relation in this specific ecotone zone. Criteria for model selection were the standard error of the estimate (Syx) and the adjusted coefficient of determination (R²adj),...

Size-dependent allocation of biomass to ancillary versus flowers of the inflorescences of the epiphyte Tillandsia stricta Soland (Bromeliaceae)

Palavras-chave: Allometry; Amazon forest; Hypsometric relationships; Dendrometry; Seasonal forest.

Ano: 2019

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672019000200081

Acta Botanica

Mantovani,André; Iglesias,Ricardo Rios.

The amount of resources invested in reproduction is closely correlated to plant size. However, the increase in reproductive investment is not always proportional to the increase in vegetative growth, as the proportion of plant resources allocated to reproduction can increase, decrease or be maintained along different plant sizes. Although comprising thousand of species, epiphytes are poorly studied in relation to reproductive allocation (RA). We describe the variation in the RA of the epiphytic bromeliad Tillandsia stricta Soland with increasing plant sizes. Our goal is not only to evaluate the RA of the whole inflorescence but also quantify the contribution of ancillary structures in the final RA of this plant species. With increasing sizes of T. stricta...

Ontogeny, allometry and architecture of Psychotria tenuinervis (Rubiaceae)

Palavras-chave: Allocation; Allometry; Ancillary structures; Bromeliaceae; Tillandsia.

Ano: 2009

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062009000100016

Acta Botanica

Rosseto,Vanessa; Carneiro,Magda Silva; Ramos,Flavio Nunes; Santos,Flavio Antonio Maës dos.

We evaluated the ontogeny of the understory shrub Psychotria tenuinervis Müll.Arg., considering morphological and morphometric characters. Four ontogenetic stages were identified: seedling, juvenile, immature and adult (vegetative and reproductive phases). Size measurements and allometric relationships of the stem and crown were compared between the immature and adult stages. Diameter and total height of the stem, as well as crown depth and width, increased throughout the ontogenetic stages and differed among immature, vegetative adult and reproductive adult individuals. The number of branches was lower in immature individuals than in vegetative and reproductive adult individuals but did not differ between the last two. The bifurcation ratio did not vary...

Ontogenetic shape changes and sexual dimorphism in Aegla marginata Bond-Buckup and Buckup, 1994

Palavras-chave: Allometry; Architecture; Branching pattern; Ontogenetic stages; Understory.

Ano: 2013

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000400012

Anais da ABC (AABC)

ADAM,CAROLINA L.; MAROCHI,MURILO Z.; MASUNARI,SETUKO.

ABSTRACT A study on relative growth, sexual dimorphism and ontogenetic trajectory was carried out in a population of the aeglidAegla marginata coming from Barrinha River, Iguape River Basin, Tunas do Paraná, Paraná State, Brazil. The size the of morphological sexual maturity was estimated for males and females. The analysis of sexual dimorphism and ontogenetic trajectory were performed using geometric morphometric technique. Males reach maturity with 10.58 mm of carapace length (CL) and females with 10.38 mm CL. Sexual size dimorphism was only visible among adults, with males reaching larger sizes. This is probably related to the reproductive strategy of males. However, sexual shape dimorphism was found for both juveniles and adults: the posterior region...

Population structure of Rudgea parquioides (Rubiaceae), a shade-tolerant shrub species, in Southern Brazil

Palavras-chave: Allometry; Relative growth; Sexual dimorphism; Shape.

Ano: 2018

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000401521

Anais da ABC (AABC)

Cardoso,Fernanda C.G.; Salvalaggio,Ana P.B.; Marques,Márcia C.M..

The expectations that shade-tolerant forest species show 1) a population structure composed by a high amount of small individuals, and 2) biomass allocation for diameter higher than for height growth, were tested for Rudgea parquioides, a typical shrub in Southern Brazil. We described the size structure (height and stem diameter) and allometrical relations of a R. parquioides population by counting and measuring all the individuals in a 725m² area in the municipality of Curitiba (25"25'S; 49"19'W). A total of 916 individuals (12,634 ind.ha-1) were recorded in the area. The firstexpectation was supported, since distribution by height and diameter classes showed a predominance of small individuals (skewness coefficients > 1). On the other hand, the...

Dendrometry and litterfall of neotropical pioneer and early secondary tree species

Palavras-chave: Allometry; Araucaria forest; Size distribution; Subtropical forest; Understorey.

Ano: 2010

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652010000300011

Benvenuti-Ferreira,Glaci; Coelho,Geraldo Ceni; Schirmer,Jorge; Lucchese,Osório Antônio.

The increased forest cover loss in the tropical and subtropical regions has stimulated the development of restoration methods through tree plantations. Based on the successional model of forest development the use of different successional groups can be seen as a strategy to accelerate the re-composition of forests and an attempt to recover ecological conditions prior to disturbance. Tree species have particular growth rates and ecological needs, and this knowledge is important in the development of high diversity models of forest restoration. The objective of this study was to compare the initial growth and litterfall of native pioneer versus early secondary tree species in a mixed plantation system, and to determine the relationships between guilds and...

Allometric models for estimating the phytomass of a secondary Atlantic Forest area of southeastern Brazil

Palavras-chave: Restoration ecology; Secondary succession; Allometry; Successional guilds.

Ano: 2009

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032009000100008

Burger,Déborah Moreira; Delitti,Welington Braz Carvalho.

The purpose of this study was to develop and validate equations to estimate the aboveground phytomass of a 30 years old plot of Atlantic Forest. In two plots of 100 m², a total of 82 trees were cut down at ground level. For each tree, height and diameter were measured. Leaves and woody material were separated in order to determine their fresh weights in field conditions. Samples of each fraction were oven dried at 80 °C to constant weight to determine their dry weight. Tree data were divided into two random samples. One sample was used for the development of the regression equations, and the other for validation. The models were developed using single linear regression analysis, where the dependent variable was the dry mass, and the independent variables...

Reproduction and growth in a Neotropical arboreal mouse: Oecomys rutilus (Sigmodontinae: Cricetidae) in French Guiana

Palavras-chave: Biomass; Allometry; Carbon; Secondary Atlantic Forest; Forest biomass estimation.

Ano: 2008

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032008000400012

Catzeflis,François.

Abstract: Postnatal growth and development of the small Neotropical mouse Oecomys rutilus (Sigmodontinae: Cricetidae) were investigated from birth to day 143, in the laboratory. Morphometric measurements at age of 3 days, of both sexes combined, revealed body weight to be 3.4 ± 0.3 g, mean tail length as 27.4 ± 1.1 mm, and mean hind foot length as 9.3 ± 0.7 mm. Body weight was found to increase steadily until at least 69 days, whereas the instantaneous growth rates of other measurements declined earlier: the daily growth of hind foot length declined to a minimum at age of 24 days, and the growth of tail and of ear declined by the age of 33 days. Average litter size for 12 captive births was 2.5, ranging from 2 to 3. The preserved eye crystalline lens was...

Length-weight and length-length relationships for rockpool fishes on the Brazilian coast

Palavras-chave: Allometry; Gompertz model; Rodents; Eye-lens weight; Life history.

Ano: 2019

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032019000200207

Machado,Fabiola Seabra; Oliveira,Rory Romero de Sena; Silva,Arianderson Texeira; Giarrizzo,Tommaso.

Abstract Fifty-nine length-weight (LWR) and length-length (LLR) relationships were estimated for 18 fish species, belonging to 10 families. The fish specimens were captured in rockpools of 21 sites along a stretch of 4,900 km of the Brazilian coast, between latitudes 00° and 22°S, in 2012. This study represents the first reference available for five fish species (Gobiesox barbatulus, Bathygobius geminatus, Labrisomus nuchipinnis, Malacoctenus delalandii, Lutjanus alexandrei) in LLR and six (Gobiesox barbatulus, Bathygobius geminatus, Hypleurochilus fissicornis, Omobranchus punctatus, Entomacrodus vomerinus, Diplodus argenteus) in LWR.

Tipo: Info:eu-repo/semantics/other

Palavras-chave: Intertidal fish; Tidepool; Allometry.

Ano: 2017

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032017000300502

Studies on the morphometry of Macrobrachium nobilii (Decapoda, Palaemonidae)

BABT

Mariappan,Pitchaimuthu; Balasundaram,Chellam.

Fourteen morphometric characters of Macrobrachium nobilii (Henderson and Matthai, 1910), a freshwater prawn were measured from 72 males and 66 females collected at random in field. The growth constant (b) of total length and weight for male (4.28) and female (3.02) differed significantly (P<0.05). Comparison of slopes and elevations of regressions between sexes indicated significant difference in all the studied dependent parameters with carapace length (X), except with carapace width (Y). In males, major and minor chelipeds showed positive allometry while in females the growth was isometric.

Influence of planting methods on root development, crop productivity and water use efficiency in maize hybrids

Palavras-chave: Allometry; Cheliped freshwater prawn length-weight Macrobrachium nobili.

Ano: 2004

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000300015

Chilean J. Agric. Res.

B. Khan,Muhammad; Yousaf,Farhan; Hussain,Mubshar; W. Haq,Muhammad; Lee,Dong-J; Farooq,Muhammad.

Optimum planting methods better ensure water and nutrient supply through improved root development resulting in better crop growth and productivity. This study was conducted to evaluate the effects of planting methods on root development, crop allometry, water use efficiency (WUE), productivity and economic returns of different maize (Zea mays L.) hybrids. Maize hybrids NK-6621, Pioneer-30Y87, and Pioneer-30Y58 were sown on beds, ridges, and flat surface. Ridge sowing was better followed by bed sowing; while amongst the hybrids, 'Pioneer-30Y87' performed the best. Well-developed root system, with longer primary root, more number of lateral roots and higher root growth rate, was observed in 'Pioneer-30Y87' planted on ridges, which led to higher WUE, grain...

Tipo: Journal article

Palavras-chave: Allometry; Planting methods; Root growth rate; Water use efficiency.

Ano: 2012

URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000400015

Allometric growth of non-carcass components in crossed lambs

Ciência Rural

Garcia,Iraides Ferreira Furusho; Alvarenga,Tharcilla Isabella Rodrigues Costa; Perez,Juan Ramon Olalquiaga; Almeida,Amelia Katiane de; Gallo,Sarita Bonagurio; Pereira,Idalmo Garcia; Alves,Nadja Gomes; Alvarenga,Flávio Augusto Pereira.

Males and females, including purebred Santa Inês lamb (SI) and crosses between Santa Inês dams and Texel (TxSI), Ile de France (IFxSI) and Bergamasca (BxSI) sires were feedlot finished and slaughtered at 15, 25, 35 and 45kg live weight. After slaughter, the following non- carcass components were weighed and calculated the allometric growth. Lungs of BxSI males grew faster than those of SI and TxSI. Trachea/esophagus in SI and TxSI males grew slower than IFxSI and BxSI. Kidneys BxSI males grew faster than TxSI and IFxSI. Livers of female TxSI lamb grew more rapidly than those of females in the other genetic groups. In both males and females, the rumen/reticulum grew faster in the TxSI group than SI and BxSI groups.

Аллометрия скоростей роста, питания и метаболизма гребневиков и медуз

Palavras-chave: Allometry; Growth; Crossbreed; Body development; Sheep.

Ano: 2014

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782014000701229

IBSS Repository

Заика, В. Е..

На материалах по росту и скорости метаболизма гребневиков и медуз подтверждено ранее сделанное автором заключение о соответствии роста этих желетелых животных экспоненциальному варианту балансовой модели роста. Эта модель основана на предположении, что при экспоненциальном росте аллометрические уравнения скоростей питания и метаболизма имеют показатель степени, равный 1 (изометрия), что и подтверждают данные по аллометрии скорости дыхания и экскреции аммиака. Изометрия физиологических скоростей, по мнению автора, связана с отсутствием у желетелых скелета и вероятным сохранением постоянной доли мезоглеи в теле гребневиков и медуз по мере их роста.

Tipo: Journal Contribution

Palavras-chave: Allometry; Growth rate; Allometry; Growth rate; Http://aims.fao.org/aos/agrovoc/c_24962; Http://aims.fao.org/aos/agrovoc/c_16130.

Ano: 2002

URL: http://repository.ibss.org.ua/dspace/handle/99011/502

Relative growth of freshwater prawn Macrobrachium brasiliense (Decapoda, Palaemonidae) and its implications for reproduction

Iheringia, Sér. Zool.

Nogueira,Caio dos Santos; Oliveira,Marcela Silvano de; Jacobucci,Giuliano Buzá; Almeida,Ariádine Cristine de.

ABSTRACT The main objective of this study was to estimate the morphological sexual maturity of Macrobrachium brasiliense (Heller, 1862) and to analyze the relative growth of the species. During one year of sampling, from July 2012 to June 2013, 199 specimens were collected in a stream located in a Cerrado biome, in the Triângulo Mineiro region, state of Minas Gerais. Once identified and sexed, the length of the carapace, the length of the segments of the chelipeds (ischium, merus, carpus, propodus and dactyl) and width of the pleura were measured (mm). The maximum and mean sizes of the carapace length measured 20.5 mm (Mean: 9.6 ± 4.2 mm) and 20.1 mm (Mean: 7.7 ± 3.4 mm) for males and females, respectively. The propodus length for males, and the pleura...

Biometry of neotropical invertebrates inhabiting floodplain rivers: unraveling bionomy

Palavras-chave: Allometry; Morphological sexual maturity; Reproductive biology.

Ano: 2019

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212019000100205

Iheringia, Sér. Zool.

Zilli,Florencia; Barco,Julia del; Vanzetti,Agustín.

ABSTRACT Currently, it is widely recognized that invertebrates play key roles in neotropical floodplains and in many other environments worldwide. However, little information has been published concerning their biometry, in spite that it represents an essential tool for many different studies. Here, we provided length-mass and length-length relationships by fitting the linearized model (log10 Y = log10a + b log10 X) and several mean biomass ratios ± SE for bivalves, gastropods, quironomids, ephemeropterans, oligochaetes and hirudineans. We measured, weighed, oven dried and incinerated to ashes specimens collected from 2005 to 2014 in the Paraná River, Argentina. The lineal equations had fit levels higher than 75% in most of the significant regressions....