Relative growth, sexual dimorphism and morphometric maturity of Trichodactylus fluviatilis (Decapoda: Brachyura: Trichodactylidae) from Santa Terezinha, Bahia, Brazil

Silva, Tiago Rozário da; Rocha, Sérgio Schwarz da; Neto, Eraldo Medeiros Costa

doi:10.1590/s1984-46702014000100003

Cited by 16 publications

(10 citation statements)

References 17 publications

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“…Similar relative growth patterns were registered in other trichodactylids such as Dilocarcinus pagei , Sylviocarcinus australis and Trichodactylus fluviatilis (Mansur et al 2005, Pinheiro and Taddei 2005, Lima et al 2013, Silva et al 2014). For Trichodactylus borellianus , although the size range showing regression models are similar for both sexes, females show some traits that estimate maturity in different sizes.…”

Section: Discussionsupporting

confidence: 76%

“…The similarities in size between the sexes were also recorded for two other species of the same family (Mansur et al 2005, Pinheiro and Taddei 2005). However, in geographically distant populations of Trichodactylus fluviatilis the size of males and females showed differences, while in other populations there was no size difference (Lima et al 2013, Silva et al 2014). …”

Section: Discussionmentioning

confidence: 80%

“…As in the crab Trichodactylus fluviatilis , the relationship between RChL vs. CW also showed a positive allometry in both sexes (Lima et al 2013, Silva et al 2014). Allometry simply implies that the relative growth between the morphometric characters being studied is not constant.…”

Section: Discussionmentioning

confidence: 82%

“…There are only a few recent studies of the allometric changes associated with growth within the genus Trichodactylus (Venâncio and Leme 2010, Lima et al 2013, Silva et al 2014). The present work focuses on allometric growth in Trichodactylus borellianus Nobili, 1896, which is a common species associated with the aquatic vegetation of the Paraná alluvial system in Argentina where it occurs in the Paraná and Paraguay rivers (Collins et al 2007), as well as in Brazil (Pará, Mato Grosso, Mato Grosso do Sul), Bolivia, and Paraguay (Magalhães 2003).…”

Section: Introductionmentioning

confidence: 99%

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Relative growth and morphological sexual maturity size of the freshwater crab Trichodactylus borellianus (Crustacea, Decapoda, Trichodactylidae) in the Middle Paraná River, Argentina

Williner¹,

Torres²,

Carvalho³

et al. 2014

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The relative growth of a number of morphological dimensions of the South American freshwater crab Trichodactylus borellianus (Trichodactylidae) were compared and related to sexual dimorphism. Crabs were collected from ponds in the Middle Paraná River in Argentina. A regression model with segmented relationship was used to test for relative growth between these measurements where breakpoints infer the body size at which crabs reach sexual maturity. In both sexes the carapace width and the length, height, and thickness of the right and left chelae were measured, as well as the male pleopod length and the female abdomen width. All of these measurements were found to show positive allometry with the exception of the male pleopod length and the left chelae, which did not show a breakpoint. In females the breakpoint for the abdomen width inferred a morphological sexual maturity at carapace width 6.9 mm. In males the break point for the pleopod length was at carapace width 6.6 mm, with that for the chelae measurements was between carapace widths 6.4 and 6.9 mm. The relative growth pattern in Trichodactylus borellianus was found to be similar to that recorded for other species of the family Trichodactylidae.

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Section: Discussionsupporting

confidence: 76%

Section: Discussionmentioning

confidence: 80%

Section: Discussionmentioning

confidence: 82%

Section: Introductionmentioning

confidence: 99%

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Relative growth and morphological sexual maturity size of the freshwater crab Trichodactylus borellianus (Crustacea, Decapoda, Trichodactylidae) in the Middle Paraná River, Argentina

Williner¹,

Torres²,

Carvalho³

et al. 2014

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“…Trichodactylids occupy key functional feeding roles in aquatic food webs, serving as efficient nutrient processors of allochthonous and autochthonous materials associated with their riverine habitats. The family Trichodactylidae consists of 51 species that are endemic to the Neotropical region (Silva et al, 2014), with Poppiana dentata (Randall, 1840) having a wide distribution throughout freshwater habitats of northern South America and Trinidad (Cumberlidge, 2008). Most brachyurans, such as P. dentata, undergo discontinuous growth whereby increase in size takes place when their rigid, calcified shell is shed during ecdysis or moulting.…”

Section: Introductionmentioning

confidence: 99%

Baseline growth of the Trinidad freshwater crab Poppiana dentata () under laboratory conditions

et al. 2021

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Poppiana dentata (Randall, 1840) is widely distributed throughout riverine habitats in Trinidad. However, there is a scarcity of information on the biology of this species. This study provides the first baseline examination that describes growth aspects for P. dentata. Juvenile crabs were obtained from berried females collected in northwest Trinidad. Carapace width (CW), length (CL), moult incident, intermoult period and qualitative aspects were recorded for crabs (N = 23) over 9 months. CW, CL and intermoult period were used to derive percentage size increment, specific growth rate (SGR) and size at structural maturity for both sexes. Growth curves and logistic equations were also generated for each sex. Hatched crabs (< 5 mm CW) underwent rapid hardening after their first moult, indicating a fast turnover of moult cycles. SGR and CW percent increment were also the highest for this initial moult (P < 0.05). CW, CL, intermoult period, size increment and SGR did not differ between sexes (P > 0.05), with logistic equations expressed as CW = 32.81 (1+exp (1.481 ̵ 0.031t))-1 for males and CW = 34.07 (1+exp (1.516 ̵ 0.027t))-1 for females. Yet, breakpoint analyses indicated dissimilar sizes for structural maturity (male: 28.40 mm CW; female: 16.84 mm CW). These patterns reflect a shorter life span for this species in comparison to what has been reported for other trichodactylid relatives. This can have implications for P. dentata populations residing in anthropogenically disturbed habitats; thus, highlighting the need for conservation strategies to ensure preservation of native wild stock.

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Growth, Sexual Maturity and Dimorphism in Six Species of Snapping Shrimps of the Genus Alpheus (Decapoda: Alpheidae)

2019

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Relative growth, sexual dimorphism and morphometric maturity of Trichodactylus fluviatilis (Decapoda: Brachyura: Trichodactylidae) from Santa Terezinha, Bahia, Brazil

Cited by 16 publications

References 17 publications

Relative growth and morphological sexual maturity size of the freshwater crab Trichodactylus borellianus (Crustacea, Decapoda, Trichodactylidae) in the Middle Paraná River, Argentina

Relative growth and morphological sexual maturity size of the freshwater crab Trichodactylus borellianus (Crustacea, Decapoda, Trichodactylidae) in the Middle Paraná River, Argentina

Baseline growth of the Trinidad freshwater crab Poppiana dentata () under laboratory conditions

Growth, Sexual Maturity and Dimorphism in Six Species of Snapping Shrimps of the Genus Alpheus (Decapoda: Alpheidae)

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