Juvenile Hatching and Maternal Care in Aegla Uruguayana (Anomura, Aeglidae)

Greco, Laura S. López; Viau, Verónica Elizabeth; Lavolpe, M.; Bond‐Buckup, Georgina; Rodríguez, Enrique

doi:10.1651/c-2441

Cited by 45 publications

(16 citation statements)

References 24 publications

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“…In freshwater aeglids, the female provides protection to the newly-hatched juveniles for a few days in the brood chamber formed by the flexed pleon (López-Greco et al 2004). Very few examples of parental care in non-aeglid anomurans are known, and are referred to as extended parental care (XPC) because it is extended up to or beyond the first juvenile instar (Thiel 2003).…”

Section: Discussionmentioning

confidence: 99%

“…Newly-hatched juveniles remain under maternal care in the brooding chamber formed by flexure of the pleon of the female for a few days before leaving their mother and starting to explore the surroundings (Bahamonde & López 1961;Rodrigues & Hebling 1978;Bond-Buckup et al 1999;López-Greco et al 2004;Francisco et al 2007). Young juveniles avoid being carried away by the water current by hiding under rocks and pebbles or in shallow areas with low water flow velocity (López 1965).…”

Section: Introductionmentioning

confidence: 99%

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Description of the newly-hatched juvenile of Aegla perobae (Crustacea: Decapoda: Aeglidae)

Moraes

Bueno

2015

Zootaxa

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The present paper contains the complete description of the external morphology of the first juvenile stage of Aegla perobae analysed through light microscopy (LM) and scanning electron microscopy (SEM). Newly-hatched juveniles were obtained from ovigerous females kept under laboratory conditions. Hatching is asynchronous, taking 2-4 days for all juveniles of a single brood to hatch. Average carapace dimensions are 1.54 mm wide and 1.69 mm long (rostrum excluded). Morphology of the carapace, of the cephalothoracic appendages (antennule, antenna, mandible, maxillule, maxilla, maxillipeds, and pereopods), of the pleon, and of the tail fan (telson plus uropods) are described in detail. Aegla perobae juveniles can be readily differentiate from the first juveniles of other aeglids species described so far by the upwardly curved condition of the distal region of the rostrum and the distinct groove along the orbital sinus produced the elevated free in this area. Pleopods 2-5 are present as rudimentary digitiform buds. Rudimentary pleopods are still present in adult males of the species, a trait not yet described in freshwater aeglids. This curious condition is compared and discussed in the light of the current knowledge of early postembryonic developmental patterns found in other anomurans.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Description of the newly-hatched juvenile of Aegla perobae (Crustacea: Decapoda: Aeglidae)

Moraes

Bueno

2015

Zootaxa

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“…In Argentina, extrataxonomic studies of this particular family are scarce (Giri and Collins 2004; López Greco et al. 2004; Devercelli and Williner 2006; Viau et al.…”

Section: Introductionmentioning

confidence: 99%

Foregut ossicles morphology and feeding of the freshwater anomuran crab Aegla uruguayana (Decapoda, Aeglidae)

Williner

2010

Acta Zoologica

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Williner, V. 2010. Foregut ossicles morphology and feeding of the freshwater anomuran crab Aegla uruguayana (Decapoda, Aeglidae). -Acta Zoologica (Stockholm) 91: 408-415.The acquisition and processing of food is critical to animal survival and reproductive success. This work describes the foregut ossicles of Aegla uruguayana, which have been proposed to impart trophic characteristics. In addition, stomach contents were analysed using Index of Relative Importance and Weighted Result Index to characterize the diet. The Pearre index was applied to analyse trophic selectivity. We found A. uruguayana has a morphological foregut typical of macrophage organisms. Stomach contents included items typical of omnivorous, generalist and opportunistic feeding modes. Vegetal remains included algae (filamentous, unicellular and colonial morphotypes), insect larvae, oligochaetes, microcrustaceans (copepods and cladocerans), mites, tardigrades, juveniles of A. uruguayana and rotifers. Morphological descriptions of the foregut can reveal feeding habits and provide data on the possible trophic profile of a species, while guiding the selection of appropriate methodology for subsequent analysis. Our stomach content data corroborated the foregut description, but the presence of small prey suggested A. uruguayana utilizes both predation and detritivory trophic strategies.

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“…In addition, abdomen size may be related to the size of the incubatory chamber that protects the developing embryos and the newly hatched juveniles that stay in the female abdomen for three to four days (López-Greco et al, 2004). This pattern has been observed for A. marginata under laboratory conditions (unpublished data).…”

Section: Discussionmentioning

confidence: 62%

Allometry and sexual dimorphism of the Neotropical freshwater anomuran Aegla marginata Bond-Buckup & Buckup, 1994 (Crustacea, Anomura, Aeglidae)

Silva

Paciencia²,

Bispo

et al. 2017

Nauplius

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Th is study analyzes ontogenetic allometry in Aegla marginata Bond-Buckup & Buckup, 1994, a freshwater crustacean, in order to evaluate the growth patt ern and the presence of sexual dimorphism, using a multivariate approach. Th e specimens were sampled from streams in Intervales State Park, São Paulo State, Brazil. For each specimen, we measured the following structures: carapace length and width, chelae height and length, and abdomen length. Allometry was evaluated using Jolicoeur's multivariate allometric coeffi cient. Our results showed that for females, ABL (abdomen length) and LCH (left chelae heigh) presented positive allometry; LCL (left chelae length) and RCH (right chelae heigh) isometry; and CL (carapace length), CW (carapace width), and RCL (right chelae length) negative allometry. For males, RCH, LCH, and LCL presented positive allometry; RCL (right chelae length) isometry; and CL, CW, and ABL negative allometry. In addition, sexual dimorphism was amplifi ed with body size. keY wordsMultivariate allometric coeffi cient, relative growth, energy investment, sexual selection. Silva et al. 2Allometry and sexual dimorphism of Aegla marginata Nauplius, 25: 2017016

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Juvenile Hatching and Maternal Care in Aegla Uruguayana (Anomura, Aeglidae)

Cited by 45 publications

References 24 publications

Description of the newly-hatched juvenile of Aegla perobae (Crustacea: Decapoda: Aeglidae)

Description of the newly-hatched juvenile of Aegla perobae (Crustacea: Decapoda: Aeglidae)

Foregut ossicles morphology and feeding of the freshwater anomuran crab Aegla uruguayana (Decapoda, Aeglidae)

Allometry and sexual dimorphism of the Neotropical freshwater anomuran Aegla marginata Bond-Buckup & Buckup, 1994 (Crustacea, Anomura, Aeglidae)

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