A família Aeglidae (Crustacea, Decapoda, Anomura)

Bond‐Buckup, Georgina; Buckup, Ludwig

doi:10.11606/issn.2176-7793.v32i4p159-346

Cited by 155 publications

(152 citation statements)

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“…Regarding the relative size of males and females, similar values were recorded for A. leptodactyla (noro & bucKuP, 2003) and A. marginata Bond-Buckup & Buckup, 1994(treVisAn et al, 2012. However, in the biometric analysis of A. uruguayana individuals, VAz-ferreirA et al (1945) observed that males were wider and longer than females in the area of the junction between third hepatic lobe and the epibranchial area (landmark 5 in this study).…”

Section: Discussionsupporting

confidence: 56%

“…Similar to this study, the authors reported that this distinction is most obvious at the posterior vertex of the cephalothorax. Sexual dimorphism was observed throughout the entire cephalothorax in other species, specifically that the posterior lateral region is wider in females than in males (lóPez, 1965;loPretto, 1978;bond-bucKuP & bucKuP, 1994;JArA, 1994;bond-bucKuP et al, 2008;giri & loy, 2008;treVisAn et al, 2012;treVisAn & sAntos, 2012). These findings will allow us to identify the moment of transition between juveniles and reproductive adults in future studies.…”

Section: Discussionmentioning

confidence: 99%

“…However, variations in this region were not evident in this study. Other authors (schmitt, 1942;ringuelet, 1948;bAhemonde & lóPez, 1961;rodrigues & hebling, 1978;JArA, 1980;bond-bucKuP & BucKuP, 1994;sWiechAyoub & mAsunAri, 2001;giri & collins, 2004;boss et al, 2006;silVA-cAstiglioni et al, 2006;giri & loy, 2008;gonçAlVes et al, 2009;bArríA et al, 2011) have agreed that males are larger than females. According to silVA-cAstiglioni et al (2006), the larger size of males is most likely because they invest their energy primarily in somatic growth.…”

Section: Discussionmentioning

confidence: 99%

“…Aeglidae are represented by a single living genus, Aegla Leach, 1820, which includes 75 species, each with an endemic distribution (sAntos et al, 2013;2014) in a variety of environments, such as lakes, swamps, caves, rivers, streams and lagoons. Alternatively: a small number of these species, including Aegla uruguayana Schmitt, 1942Schmitt, , have a wider distribution (schmitt, 1942loPretto, 1978;hobbs, 1979;bond-bucKuP & bucKuP, 1994;bond-bucKuP, 2003;giri & collins, 2004;Almerão et al, 2009).…”

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confidence: 99%

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Shape and size variations of Aegla uruguayana (Anomura, Aeglidae) under laboratory conditions: A geometric morphometric approach to the growth

Diawol

Giri

Collins

2015

Iheringia, Sér. Zool.

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ABSTRACT.Crustacean growth studies typically use modal analysis rather than focusing on the growth of individuals. In the present work, we use geometric morphometrics to determine how organism shape and size varies during the life of the freshwater crab, Aegla uruguayana Schmitt, 1942. A total of 66 individuals from diverse life cycle stages were examined daily and each exuvia was recorded. Digital images of the dorsal region of the cephalothorax were obtained for each exuvia and were subsequently used to record landmark configurations. Moult increment and intermoult period were estimated for each crab. Differences in shape between crabs of different sizes (allometry) and sexes (sexual dimorphism; SD) were observed. Allometry was registered among specimens; however, SD was not statistically significant between crabs of a given size. The intermoult period increased as size increased, but the moult frequency was similar between the sexes. Regarding ontogeny, juveniles had short and blunt rostrum, robust forehead region, and narrow cephalothorax. Unlike juveniles crabs, adults presented a well-defined anterior and posterior cephalothorax region. The rostrum was long and stylised and the forehead narrow. Geometric morphometric methods were highly effective for the analysis of aeglid-individual-growth and avoided excessive handling of individuals through exuvia analysis. KEYWORDS.Crustacea, cephalothorax, ontogeny, intermoult, morphometrics. RESUMEN. Variaciones de forma y tamaño deAegla uruguayana (Anomura, Aeglidae): Una aproximación desde la morfometría geométrica al crecimiento. Los estudios de crecimiento en crustáceos típicamente utilizan análisis modal en lugar de focalizarse en el crecimiento individual de los organismos. En el presente trabajo, utilizamos morfometría geométrica para determinar cómo varia la forma y el tamaño a lo largo de la vida del cangrejo de agua dulce, Aegla uruguayana Schmitt, 1942. Un total de 66 individuos, en diferentes etapas del ciclo de vida, se examinaron diariamente, registrándose la presencia de exuvias. Imágenes digitales de cada muda fueron obtenidas de la región dorsal del cefalotórax y se utilizaron para registrar las configuraciones de landmarks. El incremento por muda y el período de intermuda se estimaron para cada cangrejo. Diferencias de forma entre tamaños (alometría) y sexos (dimorfismo sexual; SD) se observaron. Se registró la presencia de alometría entre los especímenes; sin embargo, el SD no fue estadísticamente significativo respecto del tamaño. El período intermuda aumentó de manera directamente proporcional al tamaño, pero la frecuencia de muda fue similar entre los sexos. Durante la ontogenia, los juveniles presentaron rostro corto y romo, frente robusta, y ancho del cefalotórax estrecho. Los adultos presentaron la región anterior y posterior del cefalotórax bien definido en relación con los juveniles. El rostro fue largo y estilizado y la frente estrecha. Los métodos de morfometría geométrica fueron muy efectivos para el análisis del crecimiento individual e...

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Section: Discussionsupporting

confidence: 56%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

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Shape and size variations of Aegla uruguayana (Anomura, Aeglidae) under laboratory conditions: A geometric morphometric approach to the growth

Diawol

Giri

Collins

2015

Iheringia, Sér. Zool.

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“…Esta espécie distribui-se pelo nordeste, centro e leste do Estado do Rio Grande do Sul (BOND-BUCKUP & BUCKUP 1994).…”

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Crescimento de Aegla longirostri Bond-Buckup & Buckup (Crustacea, Anomura, Aeglidae)

2006

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O crescimento de Aegla longirostri Bond-Buckup & Buckup, 1994 foi analisado mensalmente de setembro de 1996 a agosto de 1997 no Rio Ibicuí-Mirim, Itaára, localidade de Val-de-Serra, Estado do Rio Grande do Sul, Brasil. O sexo dos espécimes coletados foi registrado e a medida do comprimento do cefalotórax foi tomada com um paquímetro. O crescimento foi estimado usando o modelo de von Bertalanffy. As curvas de crescimento em comprimento do cefalotórax (mm) de machos e fêmeas foram descritas, respectivamente, pelas equações: Ct = 27,9 [1 - e - 0,0069 (t + 24,78)] e Ct = 21,45 [1 - e - 0,0048 (t + 45,62)]. A idade máxima estimada para machos foi de um ano e nove meses e para fêmeas dois anos.

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Priority areas for conservation within four freshwater ecoregions in South America: A scale perspective based on freshwater crabs (Anomura, Aeglidae)

Gonçalves

Costa

Bond‐Buckup

et al. 2018

Aquatic Conservation

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1. Although freshwater ecosystems contain high biodiversity and provide valuable ecosystem services, they are severely threatened worldwide. Many broad-scale approaches to conserve freshwater environments have been proposed, but as headwaters tend to host higher levels of biodiversity, identifying priority areas for conservation at a local scale is essential.2. An integrative three-step framework is proposed to recognize such areas, using anomuran crabs of the family Aeglidae as biodiversity indicator taxa, within four freshwater ecoregions in South America. First, the knowledge on the distribution of species occurring within the study area was updated and the species conservation status assessed. Second, species distribution modelling was used to identify areas of high richness and endemism. Third, these areas were compared with the existing protected area network, in addition to land-use and urban information, to indicate priority areas for conservation within four freshwater ecoregions (Laguna dos Patos, Upper Uruguay, Lower Uruguay, Tramandaí and Mampituba) studied at a local scale.3. Analysis of the distribution of species of the genus Aegla showed that the present protected area network poorly covers freshwater habitats within the study region.Three priority areas for conservation were identified, with high levels of endemism and richness of aeglid species. These areas are mainly located close to current protected areas, and we suggest, therefore, that the enlargement of some protected areas, through the establishment of corridors, would better protect several species with distributions restricted to headwaters, such as macroinvertebrates and fishes, some of which are threatened with extinction.

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A família Aeglidae (Crustacea, Decapoda, Anomura)

Cited by 155 publications

References 0 publications

Shape and size variations of Aegla uruguayana (Anomura, Aeglidae) under laboratory conditions: A geometric morphometric approach to the growth

Shape and size variations of Aegla uruguayana (Anomura, Aeglidae) under laboratory conditions: A geometric morphometric approach to the growth

Crescimento de Aegla longirostri Bond-Buckup & Buckup (Crustacea, Anomura, Aeglidae)

Priority areas for conservation within four freshwater ecoregions in South America: A scale perspective based on freshwater crabs (Anomura, Aeglidae)

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