Consulta: subjectFacets:"Allometric growth"
Registros recuperados: 15
Data/hora: 08/06/2024 11:39:20

The relative growth and sexual maturity of the freshwater crab Dilocarcinus pagei (Brachyura, Trichodactylidae) in the northwestern region of the state of São Paulo
Provedor de dados: 76
Autores: Herrera,Daphine R.; Davanso,Thiago M.; Costa,Rogerio C.; Taddei,Fabiano G.
The aim of the present study was to determine the size at sexual maturity in the freshwater crab Dilocarcinus pagei Stimpson, 1861, from a population located in Mendonça, state of São Paulo, Brazil. The crabs were sampled monthly (July 2005 to June 2007), at Barra Mansa reservoir. The specimens were captured manually or in sieves passed through the aquatic vegetation. The crabs were captured and separated by sex based on morphology of the pleon and on the number of pleopods. The following dimensions were measured: carapace width (CW); carapace length (CL); propodus length (PL); and abdomen width (AW). The morphological analysis of the gonads was used to identify and categorize individuals according to their stage of development. The morphological maturity...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allometric growth; Gonadal maturity; Morphological maturity; Reproduction.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212013000300004

The importance of considering small-scale variability in macrobenthic distribution: spatial segregation between two fiddler crab species (genus Leptuca) (Decapoda, Ocypodidae)
Provedor de dados: 76
Autores: Checon,Helio H.; Costa,Tânia M.
ABSTRACT Defining the appropriate scale is important when trying to understand distribution patterns in community studies. Fiddler crabs are among the most common organisms inhabiting estuarine environments, and despite having a wide latitudinal distribution, are limited by shifts in temperature, current and wind pattern. Thus, many co-occur at a local scale, where their distribution is influenced by variables such as mean sediment grain diameter, salinity and tidal level. Our goal was to test intra and interspecific segregation in two similar and commonly co-occurring fiddler crabs species (Leptuca leptodactyla and Leptuca uruguayensis) at a small scale (10 m²). Interspecific segregation was observed, with L. leptodactyla occurring mainly at the upper...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fiddler crabs; Estuarine beach; Small-scale; Leptuca; Allometric growth.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212018000100234

Relative growth and sexual maturity of the freshwater shrimp Palaemon pandaliformis (Crustacea, Palaemonidae) in northeastern of Brazil (Canavieiras, Bahia)
Provedor de dados: 76
Autores: Paschoal,Lucas R. P.; Guimarães,Fernanda J.; Couto,Erminda C. G.
This study comprises the description of relative growth and sexual maturity of a population of Palaemon pandaliformis Stimpson, 1871 in Salsa River (Northeastern Brazil). Samples were collected monthly between September 2009 and August 2010. Females were larger, heavier, and showed a greater allometric coefficient (b) than male specimens. Only carapace length vs. pleura length in females presented a significant difference in the relative growth pattern, indicating a puberty moult. This relationship is strictly correlated to reproduction and its success rate in female shrimps. Estimated carapace length in 50% of mature females (CL50) was 4.53 mm. It was not possible to compare obtained CL50 results due to a lack of studies on this species. Comparison was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Caridea; Allometric growth; Morphometric relationships.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212013000100004

Relative growth and morphological sexual maturity of Chasmagnathus granulatus (Crustacea, Varunidae) from a mangrove area in southeastern Brazilian coast
Provedor de dados: 76
Autores: Gregati,Rafael Augusto; Negreiros-Fransozo,Maria Lucia.
The relative growth and morphological sexual maturity of Chasmagnathus granulatus Dana, 1851 are presented for the first time to a mangrove population. The crabs were obtained during low tide periods, in the mangrove of Jabaquara Beach, Paraty, Rio de Janeiro, Brazil. All crabs in intermolt stage were sexed and had their body parts measured as follows: body height (BH), carapace length (CL) and width (CW), major cheliped propodus height (PH) and length (PL) for each sex, gonopod length (GL) and abdomen width (AW) for males and females, respectively. The relative growth was described using the allometric equation y=ax b and the size at onset sexual maturity was achieved using the software Mature I. The size of specimens ranged from 4.1 mm to 39.5 mm CW. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Grapsoidea; Semiterrestrial crabs; Morphometric relationships; Allometric growth.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212007000300009

Polyphasic growth in fish: a case study with Corydoras paleatus (Siluriformes, Callichthyidae)
Provedor de dados: 76
Autores: Barradas,José R. S.; Lermen,Isabel S.; Larré,Gabriel G.; Martins,Thaís P.; Fontoura,Nelson F.
ABSTRACT A weight-length relationship was established for Corydoras paleatus (Jenyns, 1842) (Siluriformes, Callichthyidae) (n=596) from samples taken in November-December 2009 and March-April 2010, in Pinguela Lagoon (29°46'57"S; 50°11'16"W), Rio Grande do Sul, Brazil. The species showed a polyphasic allometric growth pattern, each stanza described by an independent power equation controlled by a switch function: W = a1Lb1 ∙ (1 + eRsc ∙ (L-SCP))-1 + a2Lb2 ∙ [1 - (1 + eRsc ∙ (L-SCP))-1] ; where W is the expected weight for a specific length L, a1 and a2 are the proportionality coefficients for stanzas 1 and 2, b1 and b2 are the allometric coefficients for stanzas 1 and 2, Rsc is the stanza changing rate for the switch function and SCP is the stanza changing...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allometric growth; Length at first maturity; Reproduction; Sexual maturity; Length-weight relationship.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212016000100217

Population dynamic of Sesarma rectum (Crustacea, Brachyura, Sesarmidae) from a muddy flat under human impact, Paraty, Rio de Janeiro, Brazil
Provedor de dados: 76
Autores: Silva,Stella Maris Januário da; Hirose,Gustavo Luis; Negreiros-Fransozo,Maria Lucia.
A population of Sesarma rectum Randall, 1840 under the influence of human impact was studied. Monthly sampling (CPUE, two people during 30 min) took place from August/2001 to July/2002 at an impacted muddy flat in Paraty city, State of Rio de Janeiro (23º13'S, 44º42'W). At the laboratory, specimens were classified by sex and measured with a vernier caliper (0.01 mm). The size at the beginning of the sexual maturity was obtained by means of different techniques: in the case of males it was used the allometric procedure and the macroscopic analysis of gonads wile for females, the size of the smallest ovigerous female was also considered. The population structure was evaluated by means the analysis of the variations in the modes of the size frequency...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sexual maturity; Allometric growth; Population structure; Fecundity.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212007000200010

Allometric growth patterns and development in larvae and juveniles of thick-lipped grey mullet Chelon labrosus reared in mesocosm conditions
Provedor de dados: 5
Autores: Ben Khemis, Ines; Gisbert, Enric; Alcaraz, Carles; Zouiten, Dora; Besbes, Raouf; Zouiten, Amina; Masmoudi, Ahmed Slaheddine; Cahu, Chantal.
Allometric growth and ontogeny were studied in thick-lipped grey mullet Chelon labrosus reared in mesocosms from 1 to 71 day post hatching (dph). Multivariate allometric analysis of morphometric growth distinguished three distinct developmental stanzas separated by two morphometric metamorphosis lengths (L-m1=4.46 +/- 0.06mm; L-m2= 28.56 +/- 1.04mm). Body mass growth also showed three distinct episodes separated by two inflections, correlated with morpho-functional changes. First episode concerned pre-flexion larvae and ended around 4.5mm-L-T (14-dph), coinciding with estimated L-m1. It was distinguished by reduced growth, but intense morphogenesis and differentiation processes. Organogenesis and allometric changes indicated that development priorities...
Tipo: Text
Palavras-chave: Thick-lipped grey mullet; Chelon labrosus; Larval development; Allometric growth; Mesocosm.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00166/27742/26425.pdf

Can weight/length relationship predict size at first maturity? A case study with two species of Characidae
Provedor de dados: 83
Autores: Fontoura,Nelson F.; Jesus,Anamélia S.; Larre,Gabriel G.; Porto,Juliana R.
A weight/length relationship was established for Astyanax jacuhiensis (Cope, 1894) (n = 370) and Cheirodon ibicuhiensis Eigenmann, 1915 (n = 701), from samples taken monthly in Fortaleza Lagoon, Cidreira, Rio Grande do Sul, from December 1991 through November 1992. Both species showed a polyphasic allometric growth pattern, each stanza described by an independent power equation controlled by a switch function. For C. ibicuhiensis, this change in the growth pattern occurred at 2.948 cm standard length (SL), close to published sizes for the attainment of female maturity. The change in the growth pattern of A. jacuhiensis (SL = 3.481 cm) was below the predicted size at first maturity, and merits further investigation. Although not conclusive, our data suggest...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allometric growth; Polyphasic growth; Growth stanza; Reproduction; Fish.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252010000400013

Characterization of the early development of Pseudoplatystoma reticulatum Eigenmann &amp;amp; Eigenmann, 1889 (Siluriformes: Pimelodidae) from the Paraguay River Basin
Provedor de dados: 83
Autores: Andrade,Fernanda F.; Lima,Ariane F.; Assumpção,Lucileine; Makrakis,Sergio; Kasai,Rodrigo I. D.; Makrakis,Maristela C.
ABSTRACT This study described the initial development of Pseudoplatystoma reticulatum, as well as changes in growth patterns. Morphometric and meristic variables were analyzed during embryonic, larval and juvenile periods, even as allometric growth coefficients for larvae and juveniles. Eggs showed an average diameter of 1.79 mm and broad perivitelline space (23.41%). The total length (TL) of the larvae ranged from 3.05 to 25.72 mm, and the total number of myomeres ranged from 45 to 50 (preanal = 13-16 and postanal = 30-35). Initial pigmentation is poor, concentrated at the extremities of the yolk sac. In the flexion stage, the pigmentation intensifies and forms a longitudinal stripe extending from the snout to the operculum and two longitudinal stripes on...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allometric growth; Early life stages; Fish larvae; Morphology; Ontogeny.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000200216

Floral differentiation and growth rhythm of rhizome buds of the spring ephemeroid plant Adonis amurensis Regel et Radde
Provedor de dados: 85
Autores: Liu,XL; Li,JH; Zhu,JY; Yang,YF.
Spring ephemeroid plants complete their aboveground reproduction and growth during the short growing season, and may go dormant subsequently underground. Little is known about the underground dormancy and biological activities of the plants. In this study, we observed organogenesis and growth rhythm of rhizome buds of Adonis amurensis Regel et Radde, a spring ephemeroid plant from the Changbai Mountains in northeastern China. Our results showed that A. amurensis did not go through summer dormancy, but started producing mixed buds on rhizomes soon after the aboveground parts had died. The buds grew in length and diameter following an exponential model with significantly slower rates in the early organogenesis stages, and faster rates before winter dormancy....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Adonis amurensis Regel et Radde; Rhizome bud; Exponential growth; Allometric growth; Ecological dormancy.
Ano: 2016
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572016000200018

Effect of energy intake on performance and carcass composition of broiler chickens from two different genetic groups
Provedor de dados: 89
Autores: Rosa,PS; Faria Filho,DE; Dahlke,F; Vieira,BS; Macari,M; Furlan,RL.
In order to evaluate the effect of energy intake and broiler genotype on performance, carcass yield, and fat deposition, 600 one-day-old male chicks from two different genetic groups (AgRoss 308 - commercial line and PCLC - Embrapa non-improved line) were fed diets with different metabolizable energy level (2950, 3200 and 3450 kcal/kg). A completely randomized experimental design in a 2X3 factorial arrangement with four replications of 25 birds per treatment was applied. In order to ensure different energy intake among treatments within each strain, feed intake was daily adjusted by pair-feeding schemes. AgRoss 308 broilers had better performance and carcass yield, and presented lower abdominal fat deposition rate. In both genetic groups, the highest...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allometric growth; Broiler chickens; Carcass composition; Energy intake; Genetic strains.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2007000200007

Effect of environmental factors on performance of purebred and crossbred Santa Inês lambs from birth to 154 days of age
Provedor de dados: 96
Autores: Koritiaki,Natália Albieri; Ribeiro,Edson Luis de Azambuja; Mizubuti,Ivone Yurika; Silva,Leandro das Dores Ferreira da; Barbosa,Marco Aurélio Alves de Freitas; Scerbo,Danielle Clivati; Muniz,Carolina Amália de Souza Dantas; Fernandes Júnior,Francisco.
The objectives of this study were to evaluate the environmental effects (age of dam at lambing, type of birth and sex of lamb) and genetic groups (Santa Inês and ½ Santa Inês) on weight and morphometric measurements (heart girth, body length and height) of lambs; to test linear and allometric regressions to predict the weight through the measurements; and to describe the type of growth of the measurements from weight. Weight and morphometric measurements were sampled from birth to 154 days of age, at every 14 days. For the evaluation of the environmental factors and to predict the regressions the data of birth, weaning and 154 days of age were used; and to determine the type of growth all the data collected were used. The lambs derived from younger...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allometric growth; Body morphometry; Body weight; Sheep.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000200002

Influence of environmental factors on ponderal performance and morphometric characteristics of lambs of different genetic groups from birth to weaning
Provedor de dados: 96
Autores: Koritiaki,Natália Albieri; Ribeiro,Edson Luis de Azambuja; Mizubuti,Ivone Yurika; Silva,Leandro das Dores Ferreira da; Barbosa,Marco Aurélio Alves de Freitas; Bumbieris Junior,Valter Harry; Castro,Filipe Alexandre Boscaro de; Constantino,Camila.
The objectives of this work were to evaluate the environmental effects (age of dam, type of birth and sex of lamb) and genetic groups (Hampshire Down and Ile de France, ½ and ¾ Hampshire Down, Ile de France and Suffolk, and ½ Texel) on performance and morphometric characteristics (height, length and heart girth) of lambs; to test regressions to predict live weight of lambs from body measurements; and to describe the growth type of the measurements as function of the weight. Weights and measurements were collected from birth to weaning, every 14 days. For evaluations of performance in relation to environmental effects and genetic groups, only data from birth and from weaning were used; for type of growth all collected data were used. Lambs from younger ewes...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allometric growth; Body morphometry; Body weight; Sheep.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000700001

Comparative analysis of the relative growth of Uca rapax (Smith) (Crustacea, Ocypodidae) from two mangroves in São Paulo, Brazil
Provedor de dados: 104
Autores: Castiglioni,Daniela da Silva; Negreiros-Fransozo,Maria Lucia.
A study on the relative growth of two populations of Uca rapax (Smith, 1870) was performed primarily to determine the size at onset sexual maturity. The species was sampled monthly in Itamambuca (23º24'43"S and 45º00'73"W) and Ubatumirim (23º20'17.8"S and 44º53'2.2"W) mangroves. Carapace width (CW) and length (CL), abdomen width (AW), major cheliped propodus length (PL) and height (PH) for each sex, and gonopod length (GL) for males were measured with a calliper (0.01 mm). Allometric analyses were used to estimate size at maturity. The relationships that most precisely indicated the size at onset of sexual maturity were AW vs. CW, for females and PL vs. CW, for males. Males and females are mature, respectively at 15.2 and 12.1 mm CW in samples from...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allometric growth; Morphologic maturity.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752004000100023

ALLOMETRIC GROWTH OF PRIMAL CUTS AND TISSUES IN THE PIG
Provedor de dados: 65
Autores: Siewerdt,Frank; Farias,José Viriato da Silva; Osório,José Carlos da Silveira; Jacondino,Ilo Francisco Ribeiro.
Data from 82 purebred and crossbred Large White and Duroc barrows and gilts were used to describe the growth of carcass primal cuts, of tissues, and of several organs. Pigs were allowed ad libitum to a conventional diet, which contained com and soybean meal. Pigs were weighted weekly and were slaughtered when attained a liveweight over 90kg. An allometric pattern of growth was assumed. Within the observed range of liveweight, the carcass grew slower than the whole animal. An increase of carcass weight corresponds to a similar increase of lean, but also corresponds to a larger increase of fat tissues. A suggestion to slaughter pigs near to 90kg of liveweight is presented, in order to obtain leaner carcasses.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allometric growth; Carcasses; Pigs.
Ano: 1994
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84781994000300031