Length-weight relationship and condition factor of the mangrove crab Ucides cordatus (Linnaeus, 1763) (Crustacea, Brachyura, Ucididae)

Pinheiro, Marcelo Antônio Amaro; Fiscarelli, Ana Gláucia

doi:10.1590/s1516-89132009000200017

Cited by 66 publications

(84 citation statements)

References 14 publications

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“…, where HW is the humid weight, CW is the carapace width, b is the slope, and a the intercept (Pinheiro & FiSCareLLi, 2009). The fit was evaluated by the coefficient of determination (r²).…”

Section: Methodsmentioning

confidence: 99%

“…The total condition factor was calculated for each sex by the formula a = HW/CW b (Le Cren, 1951;Pinheiro & FiSCareLLi, 2009), where HW is the humid weight, CW is the carapace width, b is the slope, and a is the condition factor. This formula was also applied by months and seasons of the year (Summer = January to March; Autumn = April to June; Winter = July to September; and Spring = October to December) for each sex.…”

Section: Methodsmentioning

confidence: 99%

“…The constant a represents the degree of fattening (condition factor), the coefficient b means the weight gain, y is the dependent variable, the weight, and x the independent variable, the size (Pinheiro & FiSCareLLi, 2009).…”

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confidence: 99%

“…It has been commonly applied to fish (Le Cren, 1951;rakitin et al, 1999;dutiL et al, 2003;FroeSe, 2006), and crustacean species (rodríguez, 1987;BranCo & thiVeS, 1991;atar & Seçer, 2003;BranCo & FraCaSSo, 2004;miyaSaka et al, 2007;Pinheiro & FiSCareLLi, 2009;mohaPatra et al, 2010).…”

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Condition factor of Goniopsis cruentata (Crustacea, Brachyura, Grapsidae) from Mundaú/Manguaba estuarine complex, Alagoas, Brazil

Lira

Calado

Araújo

2012

Iheringia, Sér. Zool.

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ABSTRACT. The condition factor is a parameter which acts as a general indicator of the "well-being" of a species, and it can be obtained through the analysis of width vs. weight relationships. The present work aims to investigate size vs. weight relationship and the condition factor of the crab Goniopsis cruentata (Latreille, 1803). The study area was the Mundaú/Manguaba estuarine complex, Maceió, state of Alagoas, Northeast Brazil. Samplings were monthly accomplished from August 2007 to July 2008. A total of 626 individuals were analyzed, being 309 males and 317 females. Males were larger and heavier than females, what is expected in many brachyuran. The growth was positive allometric to both males (b = 3.42) and females (b = 3.30), not obeying the "cube law". The condition factor of female was higher than that of male crabs, probably due to the gonad weight of females. It also varied seasonally for both sexes, being higher in the autumn and winter in males, and in the autumn and spring in females, and related to the molt and period of spawning intensification. KEYWORDS.Crab, growth, sexual dimorphism, mangrove forest, Northeast Brazil. RESUMO. Fator de condição deGoniopsis cruentata (Crustacea, Brachyura, Grapsidae) do complexo estuarino Mundaú/Manguaba, Alagoas, Brasil. O fator de condição é um parâmetro que age como um indicador geral do "bem-estar" de uma espécie e pode ser obtido através da análise da relação largura-peso. O presente trabalho visa investigar a relação tamanho vs. peso e o fator de condição do caranguejo Goniopsis cruentata (Latreille, 1803). A área de estudo foi o complexo estuarino Mundaú/Manguaba, Maceió, estado de Alagoas, Nordeste do Brasil. As amostragens foram realizadas mensalmente de agosto de 2007 a julho de 2008. Um total de 626 indivíduos foi analisado, sendo 309 machos e 317 fêmeas. Os machos foram maiores e mais pesados que as fêmeas, o que é esperado em muitas espécies de braquiúros. O crescimento foi alométrico positivo tanto para machos (b = 3,42) quanto para fêmeas (b = 3,30), não obedecendo a "regra do cubo". O fator de condição da fêmea foi maior do que o dos machos, provavelmente devido ao peso das gônadas das fêmeas. O fator de condição também variou sazonalmente para ambos os sexos, sendo mais elevado no outono e no inverno nos machos, e no outono e primavera nas fêmeas, e estando relacionado à muda e ao período intenso de desova. PALAVRAS-CHAVE.Caranguejo, crescimento, dimorfismo sexual, manguezal, Nordeste do Brasil.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

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confidence: 99%

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Condition factor of Goniopsis cruentata (Crustacea, Brachyura, Grapsidae) from Mundaú/Manguaba estuarine complex, Alagoas, Brazil

Lira

Calado

Araújo

2012

Iheringia, Sér. Zool.

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“…Body length/weight ratio is widely used to monitor the growth and condition factor of several animal species [20][21][22]. Furthermore, the use of other biometrics such as curvilinear length and circumference of the body are also important tools in the estimation of body weight in predictive models, such as the seals [23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Prediction Equation of Body Weight of Amazonian Manatee (Trichechus inunguis) Calves in Captivity Using Biometry

Mendoza¹,

Loja²,

Lizana³

et al. 2017

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The objective of the study was to determine a prediction equation of body weight of Amazonian manatee calves in captivity using their biometry. It was conducted out with 7 calves (4 males and 3 females) of approximately 8 months of age and average body weight of 29.94 ± 0.055 kg, arranged in pools of sufficient size. Biometry and weighing were performed periodically, with the following measurements: body weight (BW), total curved length (TCL), total length (TL), circumference (CIR), fin width (FW), tail width (TW) and peduncle (PED). Data were subjected to Pearson correlation analysis and linear regression, using the statistical software IBM SPSS 24.0. The results showed a significant correlation (P < 0.05) between BW and TCL, TL, FW, TW, CIR and PED. Six linear simple regression equations were generated with relation to BW, using as predictor variables those that showed positive correlation. The CIR equation independent variable had the highest correlation coefficient and less error estimate (R 2 = 0.855, 2 aj R = 0.852). In addition, three linear multiple regression equations of BW were calculated using the predictor variables previously analyzed by Person correlation analysis. The equation that used all biometric measurements (TCL, TL, FW, TW, CIR and PED) had the highest coefficient of determination and the lowest estimation error to predict BW. In conclusion, the biometric measurements of TCL, TL, FW, TW, CIR and PED showed a high correlation with the BW and can be used as predictive variables of BW of manatee calves, as they are easy to be measured.

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Mangrove habitat partitioning by Ucides cordatus (Ucididae): effects of the degree of tidal flooding and tree-species composition during its life cycle

Wunderlich

Pinheiro

2012

Helgol Mar Res

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Environmental factors strongly affect mangrove crabs, and some factors modulate population structure and habitat partitioning during the crabs' life cycle. However, the effect of these environmental factors on habitat selection by mangrove crabs is still unknown. We evaluated habitat selection by the mangrove crab Ucides cordatus in mangrove forests with different degrees of predominance of Rhizophora mangle, Laguncularia racemosa or Avicennia schaueriana, two tidal flooding levels (less-and more-flooded), and two biological periods (breeding and non-breeding seasons). Sampling was conducted in four mangrove forests with different influences of these biotic and abiotic parameters. We used the data for sex ratio to explain environmental partitioning by this species. Females predominated in R. mangle mangroves, independently of the biological period (breeding or nonbreeding seasons), and males predominated only in the less-flooded L. racemosa mangroves. The flooding level affected the sex ratio of U. cordatus, with a predominance of males in less-flooded mangroves, independently of the biological period; and a gender balance in the more-flooded mangroves only during the breeding season. Outside the breeding season, the largest specimens were recorded in the R. mangle mangroves, but in the breeding season, the largest crabs were recorded in the L. racemosa mangroves with a higher level of flooding. These results suggest that tree-species composition and tidal flooding level can have a significant effect on the habitat partitioning of sexes and sizes of the mangrove crab U. cordatus both during and outside the breeding season.

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Length-weight relationship and condition factor of the mangrove crab Ucides cordatus (Linnaeus, 1763) (Crustacea, Brachyura, Ucididae)

Abstract: The relationship of wet weight (WT) to cephalothorax width (CW) and temporal and seasonal variations in

Cited by 66 publications

References 14 publications

Condition factor of Goniopsis cruentata (Crustacea, Brachyura, Grapsidae) from Mundaú/Manguaba estuarine complex, Alagoas, Brazil

Condition factor of Goniopsis cruentata (Crustacea, Brachyura, Grapsidae) from Mundaú/Manguaba estuarine complex, Alagoas, Brazil

Prediction Equation of Body Weight of Amazonian Manatee (Trichechus inunguis) Calves in Captivity Using Biometry

Mangrove habitat partitioning by Ucides cordatus (Ucididae): effects of the degree of tidal flooding and tree-species composition during its life cycle

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