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

Takano, Bruno Fernandes; Cohen, Felipe P. A.; Fransozo, Adílson; Shimizu, Roberto Munehisa; Bueno, Sérgio Luiz de Siqueira

doi:10.1590/2358-2936e2016010

Cited by 10 publications

(6 citation statements)

References 41 publications

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“…The size of each population also influenced by the environmental conditions (Oliveira & Santos, 2011). As in the present study, other works bring the trend of males attaining morphometric maturity to a larger size than females (Takano et al, 2016).…”

Section: Discussionsupporting

confidence: 66%

“…Aeglid males have a tendency the left chela to be the largest (or longest) one in relation to the right chela. In A. franca, 89.30% of males are left-handed (Bueno & Shimizu, 2009), in A. castro, they are 72.95 % (Takano et al, 2016), and in A. parana, 75.11% (present study). Other examples of heterochelous aeglids with handedness preponderance of the left chela are mentioned in Bahamonde & López (1961), López (1965), Rodrigues & Hebling (1978), Viau et al (2006) and Oliveira & Santos (2011).…”

Section: Discussionsupporting

confidence: 50%

“…In most decapod crustaceans changes in trend of relative growth produce adult males with enlarged chela which is advantageous in fighting for and attraction of females, and adult females with enlarged abdomen that favors accommodation of egg mass (Hartnoll, 1974). This pattern has been observed in the following aeglid crabs: Aegla longirostri Bond Buckup & Buckup, 1994 (Colpo et al, 2005), Aegla uruguayana Schmitt, 1942(Viau et al, 2006, Aegla franca Schmitt, 1942(Bueno & Shimizu, 2009, Aegla platensis Schmitt, 1942(Oliveira & Santos, 2011, Aegla manuniflata Bond-Buckup & Santos, 2009 (Trevisan & Santos, 2012), Aegla marginata Bond-Buckup & Buckup, 1994(Silva et al, 2016, Aegla georginae Santos & Jara, 2013(Copatti et al, 2015, Aegla castro Schmitt, 1942(Takano et al, 2016 and Aegla marginata (Adam et al, 2018). Each population has own size of onset of MSM.…”

Section: Aegla Paranamentioning

confidence: 86%

“…Oliveira & Santos (2011) estimated that the maturity in Aegla species is reached between approximately 40 and 70% in relation to the size of the largest sampled individual. Takano et al (2016) estimated the percentage of 38 and 60%, indicating that aeglids tend to attain morphometric maturity by the time they are approximately half as large as the maximum size they reach. The size of each population also influenced by the environmental conditions (Oliveira & Santos, 2011).…”

Section: Discussionmentioning

confidence: 99%

“…In addition to body size other corporate features are related to a reproductive ecology. In heterochelous decapods, each chelae may be used in different ways, the use of the minor chela is also associated with grooming behavior, while the major chela are associated with reproductive activities as agonistic confrontations, reproductive behavior, to defend receptive females from other males (Mariappan et al, 2000;Viau et al, 2006;Almerão et al, 2010;Takano et al, 2016), in A. uruguayana both chelipeds may participate in specific reproductive tasks (Viau et al, 2006). On the other hand, the aeglid female's abdomen has a primordial importance for accommodation of eggs during their embryogenesis.…”

Section: Discussionmentioning

confidence: 99%

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Morphological sexual maturity of the freshwater anomuran crab Aegla parana (Crustacea, Decapoda, Aeglidae) from Negro River Sub-basin, Upper Iguaçu Basin, southern Brazil

Schafaschek

Masunari

2019

Iheringia, Sér. Zool.

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The carapace length (CL) at the onset of morphological sexual maturity (MSM) in Aegla paranaSchmitt, 1942was estimated in a population located at Negro River Sub-basin, Upper Iguaçu Basin, southern Brazil. The animals were captured with Surber net and with baited traps in Negro River and in its tributary Totó River, in December/2017, June and July/2018. Carapace length of each individual was measured from the tip of the rostrum to the posterior margin of the carapace, with a digital caliper or under a digital microscope. Length of the major cheliped propodus (LMAP) of males and width of the abdomen (LA) of females were measured for relative growth analysis. The CL at the onset of MSM was estimated as the inflection points on the scatter plots with the REGRANS program. In Negro River, 107 males (CL range 6.90- 50.25 mm) and 95 females (10.37-39.36 mm) were obtained, while in Toto River, 225 males (4.92-25.65 mm) and 160 females (5.18- 26.45 mm). MSM is attained by males at 23.15 mm CL and females at 17.85 mm CL. The smallest ovigerous female measured 19.00 mm CL. Aegla parana reaches the highest maximum size and males attain MSM with the highest CL value among the known species of the genus.

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Section: Discussionsupporting

confidence: 66%