Population Biology of the Freshwater Anomuran Aegla Longirostri (Aeglidae) from South Brazilian Streams

Colpo, Karine Delevati; Ribeiro, Ludmilla Oliveira; Santos, Sandro

doi:10.1651/c-2543

Cited by 55 publications

(53 citation statements)

References 11 publications

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“…Although pleon dimensions have frequently been used as dependent variable (Colpo et al, 2005;Viau et al, 2006;Oliveira and Santos, 2011;Trevisan and Santos, 2012;Copatti et al, 2015) in similar studies regarding female aeglids, Bueno and Shimizu (2009) have shown that the use of chelae dimensions as dependent variables in allometric growth analysis can be equally informative either in males or females and can provide very consistent and precise results, as long as bivariate dataset (selected dependent variable vs. independent variable) are grouped according to major and minor chelae criterion. This procedure is recommended so as to avoid the introduction of possible biased data whenever a predominantly-sided handedness -while still exhibiting proportion of individuals with reversed handedness -is clearly detected in a heterochelous population should the left-and-right chelae criterion be chosen instead (Bueno and Shimizu, 2009).…”

Section: Discussionmentioning

confidence: 99%

“…The former is associated with the puberty molt and marks the transition from the juvenile into the adult phase, whereas the latter refers to sexually matured individuals that successfully take part in the reproductive process (see López-Greco and Rodríguez, 1999 for review on sexual maturity in decapods). Allometric growth analysis has been often employed in determining the average size at the onset of morphometric maturity of aeglids species (Colpo et al, 2005;Viau et al, 2006;Bueno and Shimizu, 2009;Oliveira and Santos, 2011;Trevisan and Santos, 2012;Copatti et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

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Allometric growth, sexual maturity and reproductive cycle of Aegla castro (Decapoda: Anomura: Aeglidae) from Itatinga, state of São Paulo, southeastern Brazil

et al. 2016

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Allometric growth, sexual maturity and reproductive cycle of Aegla castro (Decapoda: Anomura: Aeglidae) from Itatinga, state of São Paulo, southeastern Brazil

et al. 2016

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“…COLPO et al (2005) estimaram a maturidade sexual em Aegla longirostri e os valores obtidos foram de 13,7 mm de CC para machos e 8,6 mm para fêmeas. Nas fêmeas, o CC no momento em que 50% delas estavam maduras, foi de 10,7 mm.…”

Section: Discussionunclassified

Maturidade sexual morfológica de Aegla platensis (Crustacea, Decapoda, Anomura) no Lajeado Bonito, norte do estado do Rio Grande do Sul, Brasil

Oliveira

Santos

2011

Iheringia, Sér. Zool.

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O tamanho da primeira maturação sexual (TPM) em Aegla platensis Schmitt, 1942 foi estimado através das mudanças nas proporções de dimensões corporais dos animais. Para isso, foram realizadas coletas mensais, de julho de 2007 a junho de 2008 no Lajeado Bonito (27º25'27''S, 53º24'39''W), um tributário de primeira ordem do Rio da Várzea, município de Frederico Westphalen, Rio Grande do Sul. Foram utilizados 437 machos com comprimento de cefalotórax (CC) variando de 6,00 mm a 31,75 mm e 368 fêmeas, com tamanhos entre 6,08 mm e 27,92 mm de CC. As seguintes dimensões corporais foram mensuradas em todos os indivíduos coletados: comprimento do cefalotórax (CC), largura do abdome (LA), comprimento do própodo do quelípodo direito (CPD) e comprimento do própodo do quelípodo esquerdo (CPE). Após o registro dessas medidas, os animais foram devolvidos ao mesmo local de captura. As análises de maturidade sexual morfológica foram realizadas com auxílio do software Mature 2, nas quais foram utilizadas as medidas de CC, considerada como variável independente e relacionada com as demais dimensões. As relações que melhor se ajustaram para estas análises, em machos, foram CPD x CC (TPM: CC=18,2 mm) e CPE x CC (TPM: CC=20,1 mm) e LA x CC (TPM: CC=16,5 mm) nas fêmeas.

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“…The 1:1 sexual ratio was established based on the predominant pattern observed in other limnic crustaceans (COLPO et al 2005, GONÇALVES et al 2006, LIMA et al 2006.…”

Section: Methodsmentioning

confidence: 99%

Behavioral repertory of Trichodactylus panoplus (Crustacea: Trichodactylidae) under laboratory conditions

Zimmermann¹,

Aued²,

Machado³

et al. 2009

Zoologia (Curitiba, Impr.)

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This work describes the behavioral repertory of Trichodactylus panoplus von Martens, 1869, based on the animals' diel activity and the possible substrate preference under laboratory experiments. Three experimental replicates were carried out, each using six animals (three males and three females). There were four periods of observation a day, with a total of 864 observation sessions and 144 hours of experiments. A total of 15 behavioral acts divided into five categories were recorded: feeding, exploration of the environment, immobility, social interaction, and self-grooming. The obtained results suggest that T. panoplus has greater activity during the night (p < 0.05), yet without showing an activity peak. In addition, the acceptance of food does not depend on the photoperiod. There was a significant preference for gravel as the chosen substrate. The Morisita index indicates an aggregated distribution of these animals, confirming their preference for substrate with gravel. The increase in activity at night and the preference for substrate with gravel, which can be used to disguise these individuals, would be associated to some anti-predator strategies of these crabs against visually orientated predators

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Population Biology of the Freshwater Anomuran Aegla Longirostri (Aeglidae) from South Brazilian Streams

Cited by 55 publications

References 11 publications

Allometric growth, sexual maturity and reproductive cycle of Aegla castro (Decapoda: Anomura: Aeglidae) from Itatinga, state of São Paulo, southeastern Brazil

Allometric growth, sexual maturity and reproductive cycle of Aegla castro (Decapoda: Anomura: Aeglidae) from Itatinga, state of São Paulo, southeastern Brazil

Maturidade sexual morfológica de Aegla platensis (Crustacea, Decapoda, Anomura) no Lajeado Bonito, norte do estado do Rio Grande do Sul, Brasil

Behavioral repertory of Trichodactylus panoplus (Crustacea: Trichodactylidae) under laboratory conditions

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