Papers by Georgina Bond Buckup
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Crustacean species from Brazil were evaluated to define their conservation status
under the Cate... more Crustacean species from Brazil were evaluated to define their conservation status
under the Categories and Criteria of the IUCN Red List of Threatened Species at
the regional level. This study represents an effort of the Chico Mendes Institute
for Biodiversity Conservation (ICMBio), the Brazilian agency for conservation of
biodiversity, and the Brazilian Crustacean Society (SBC) to systematically collate
specific data for these species and to determine their risks of extinction. The IUCN
Red List Categories and Criteria were applied to 130 candidate species, following
IUCN Red List Guidelines. Assessments to determine the risk of extinction were
conducted during a three-day workshop held in Brasília in September 2010, which
brought together about 30 experts to share information about species and threats. A
total of 14 species (11.6%), 12 of them endemic to Brazil, qualified for one of the
three Red List categories of threat (CR, EN, or VU). Twenty-five species (20.8%)
were listed as Data Deficient, and because of this lack of data the extinction risk for
crustaceans may be under-estimated. IUCN Criterion B was most often used during
the assessments (85%), and the main threats identified are associated with removal
of riparian forest causing siltation, and discharge of domestic, urban, industrial, and
agricultural effluents, degrading water quality, as well as uncontrolled fishery activities.
The South Atlantic hydrological basin contains the largest number of threatened
species, which indicates that increased attention from agencies, institutions, and
researchers is needed to develop appropriate strategies and regulations to aid in their
conservation.
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Resumo A fauna de invertebrados bentônicos tem importante papel nas cadeias tróficas dos ambiente... more Resumo A fauna de invertebrados bentônicos tem importante papel nas cadeias tróficas dos ambientes límnicos, servindo de alimento para peixes e crustáceos. A pesquisa tem por objetivo identificar e comparar, quantitativa e qualitativamente, a comunidade de macroinvertebrados de dois cursos d´água da bacia do Guaíba, no Rio Grande do Sul. As amostras foram realizadas com amostrador Surber, mensalmente, de Setembro 1999 a agosto de 2000, em um arroio formador do Rio Tainhas, cerca de São Francisco de Paula (29º 15' 30,2''S, 50º 13' 12,5'' W) e no arroio do Mineiro, próximo a Taquara (29º 30' 0,2''S, 50º 46' 50''W). Em cada ponto de amostragem foram verificados os parâmetros físicos e químicos da água. No laboratório, as amostras foram triadas e os animais identificados e quantificados. Os reultados mostraram que o oxigênio dissolvido e o pH foram similares nos dois locais, enquanto a condutividade mostrou valores extremos. Os grupos mais...
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Arquivos de Zoologia, 1994
The family Aeglidae comprises the genus Aegla with recent species and the genus Haumuriaegla with... more The family Aeglidae comprises the genus Aegla with recent species and the genus Haumuriaegla with the fossil species H. glaessneri Feldmann, 1984. The results from the revision of the family Aeglidae, mainly from the study of the genus Aegla Leach, 1820, based on material ...
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Acta Oecologica, 2008
This work was performed with the aim to test theoretical predictions regarding that the sympatric... more This work was performed with the aim to test theoretical predictions regarding that the sympatric species Hyalella pleoacuta and H. castroi might show distinct population biology to facilitate its coexistence. The specimens were collected monthly with nets from August 2003 through July 2004 in two trout ponds at Sítio Vale das Trutas locality, São José dos Ausentes County, southern Brazil. In the laboratory, the specimens were measured as cephalothorax length (mm), being the sex and ovigerous conditions checked. The species H. pleoacuta was 2.94 times more frequent than H. castroi. Males were significantly greater in size than females ( H. pleoacuta---males: 0.74 ± 0.002 mm and females: 0.66 ± 0.001 mm; H. castroi---males: 0.84 ± 0.00 mm and females: 0.72 ± 0.003 mm). Males and females of H. castroi showed a greater mean body size than H. pleoacuta. Sexual maturity was attained at 0.53 mm in males and 0.48 mm in females of H. pleoacuta, and 0.72 mm in males and 0.67 mm in females of H. castroi. The frequency distribution in size classes was usually bimodal in H. pleoacuta and polymodal in H. castroi throughout the year. Sex ratio was female-biased in either species of Hyalella. Ovigerous females (carrying eggs or juveniles in the marsupium) were collected throughout the year in both Hyalella species, but H. pleoacuta and H. castroi were found with more frequency during the winter and fall, respectively. Recruitment occurred in all months of sampling, the juvenile frequency being more than 50% of the amphipods collected in almost all months in both species. The biological differences (especially body size, size at sexual maturity, number of specimens collected and reproductive peak) and microhabitat specialization can be facilitating factors in the coexistence of H. pleoacuta and H. castroi in artificial ponds raising trout.
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Journal of Crustacean Biology
Nineteen species and subspecies of freshwater crabs from the anomuran family Aeglidae are represe... more Nineteen species and subspecies of freshwater crabs from the anomuran family Aeglidae are represented in Chile, 16 of which are endemic to this country. We sequenced 2,600 nucleotides of the 12S, 16S, COI, and COII genes from mitochondrial DNA to estimate phylogenetic relationships among the Chilean aeglids. We sampled 16 putative Chilean species and subspecies and one morphologically unrecognized taxon according to the most recent Aeglidae classification. In addition to the Chilean aeglids, one sample of Aegla riolimayana and two samples of Aegla affinis were collected from Argentina to check previous hypotheses about the origin of the group. Two other anomurans, one galatheid (Munida subrugosa) and one porcellanid (Pachycheles haigae), were sequenced to serve as outgroups in our phylogenetic analysis. Our results show the clear separation of Aegla papudo from the other Aegla species, as has been suggested previously based on morphology. Its basal position in the Aeglidae trees als...
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A new species of freshwater anomuran, Aegla renana n. sp. (Decapoda: Aeglidae), is described from... more A new species of freshwater anomuran, Aegla renana n. sp. (Decapoda: Aeglidae), is described from the Caí River sub-basin, a tributary of the Jacuí/Guaíba system, from the northwest region of the state of Rio Grande do Sul, Brazil. It can be distinguished from its congeners based on both morphological and molecular evidence. Morphologically, the new species partly resembles Aegla ligulata because of its ligulate rostrum; however, A.renana has an inflated left propodus of the cheliped, similar to that of A.manuinflata. Based on the phylogenetic analysis of DNA sequence data, A. renana has a sister relationship with A.itacolomiensis and both are clustered with the A.longirostri-A.inermis clade. New distribution records of A.franciscana, A.longirostri and A.inermis, which occur in the same hydrographic basin, are provided.
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Memoirs of Museum Victoria
The aim of this study is to evaluate the effect of circadian and seasonal variations on the metab... more The aim of this study is to evaluate the effect of circadian and seasonal variations on the metabolism of carbohydrates in different tissues of the freshwater anomuran Aegla ligulata Bond-Buckup and Buckup, 1994. Samples of A. ligulata were collected monthly from August 1999 to August 2000 in Tainhas, São Francisco de Paula, RS, Brazil, at 0600 h, 1200 h and 1800 h. Samples of haemolymph and tissues (hepatopancreas, gills and muscle) were taken to determine glucose and glycogen levels. Data indicated the presence of high levels of haemolymphatic glucose, especially in spring, and we also found circadian differences between males and females. These variations seem to be related to the reproductive period of the species, food availability and the degree of environmental exploration. These factors lead to different metabolic adjustments in distinct species of crustaceans.
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Revista Brasileira de Zoologia
The benthic fauna has an important role in the trophic chain of limnic environments, serving as f... more The benthic fauna has an important role in the trophic chain of limnic environments, serving as food for fishes and crustaceans. This work aimed to identify and compare, quantitative and qualitatively, the macrobenthic communities from two watercourses in Rio Grande do Sul State. Samplings were done with a Surber sampler, monthly, from September 1999 to August 2000, in one of the creeks forming Tainhas River(29º15'30,2"S, 50º13'12,5"W), around São Francisco de Paula city and in Mineiro Creek (29º30'0,2"S, 50º46'50"W), around Taquara city. At each sampling point, physical and chemical variables of the waters were registered. In the laboratory, the samples were sorted out and the animals identified and quantified. Dissolved oxigen, pH and stream speed were very similar for both environments, whilst conductivity had extreme values. Insects, crustaceans, acari and molluscs dominated in the samples. Abundance, richness and diversity indexes in Tainhas ...
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Journal of Crustacean Biology
Two new species of freshwater anomurans, Aegla pomerana and Aegla muelleri (Decapoda: Anomura: Ae... more Two new species of freshwater anomurans, Aegla pomerana and Aegla muelleri (Decapoda: Anomura: Aeglidae), are described from the Itajaí River basin, the major basin of the Atlantic range, located in the northeastern part of the state of Santa Catarina, Brazil. The new taxa can be distinguished from their congeners based on both morphological and molecular evidence (the nuclear gene 28S, and the mitochondrial genes 12S, 16S, COI, and COII). Based on molecular data, A. pomerana has a phylogenetic relationship with A. leptodactyla, but morphologically these two species differ in several characters. Aegla muelleri is a member of the same clade as A. leptochela, but several morphological characters distinguish the two species. New records of occurrence of A. jarai and A. odebrechtii, which occur in the same hydrographic basin, are provided.
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Invertebrate Reproduction and Development
The postmarsupial development of Atlantoscia floridana (van Name, 1940) was studied, with emphasi... more The postmarsupial development of Atlantoscia floridana (van Name, 1940) was studied, with emphasis on the sexual differentiation and maturity. Samples were obtained in the Reserva Biológica do Lami, Porto Alegre, RS, Brazil, during 2000 and 2002. Collected animals were reared in the laboratory under temperatures of about 20±1°C and observed daily. Animals preserved in 70% ethanol were used to analyze sexual maturity. Growth was monitored as each animal moulted for evidence of sexual differentiation. The development of the male genitalia and the female genital pore was described across the different juvenile stages. Female sexual maturity was estimated to occur at a minimum size of 1.04 mm cephalothorax width. Male sexual maturity was estimated from the morphometric relationship between cephalothorax width and length of the genital papilla and indicated the puberal moult to occur at a minimum size of 0.77 mm cephalothorax width. Identification of the size at which sexual maturity occ...
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Advances in Freshwater Decapod Systematics and Biology, 2014
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Revista de biología tropical, 2008
The freshwater crab Aegla platensis was used as a model to induce ovarian growth by adding differ... more The freshwater crab Aegla platensis was used as a model to induce ovarian growth by adding different neuroregulators to a pellet food formulation. Added compounds were the dopaminergic inhibitor spiperone or the enkephalinergic inhibitor naloxone, both of them at a dose of 10(-8) mol/animal. Animals were fed on the enriched pellets twice a week. After 7 wk, the gonadosomatic index (GI) was calculated as (gonad fresh weight/body fresh weight) x 100. GI significantly increased only for those females fed on spiperone pellets, compared to a control group receiving pellets with no compound added. During the assayed period, spiperone would be reverting the arrest exerted by dopamine on the neuroendocrine stimulation of ovarian growth. On the other hand, for both spiperone and naloxone a higher GI was correlated to a higher lipid content of both gonads and/or hepatopancreas, suggesting an increased energetic demand in accordance with an active investment in reproduction.
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Revista Brasileira De Zoologia, 2003
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Systematic Biology, 2004
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Zoologia (Curitiba, Impresso), 2009
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Revista Brasileira de Zoologia, 1990
Page 1. REVISTA BRASILEIRA DE ZOOLOGIA Revta bras. Zool.. 7 (1-2) :47-57 15!XIJ/91 OS MYSIDACEA D... more Page 1. REVISTA BRASILEIRA DE ZOOLOGIA Revta bras. Zool.. 7 (1-2) :47-57 15!XIJ/91 OS MYSIDACEA DA REGIÃO L1TORÃNEA E ESTUARINA DE TRAMANDAf, RS, BRASIL (CRUSTÁCEA, PERACARIDA, MYSIDACEA) ...
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Papers by Georgina Bond Buckup
under the Categories and Criteria of the IUCN Red List of Threatened Species at
the regional level. This study represents an effort of the Chico Mendes Institute
for Biodiversity Conservation (ICMBio), the Brazilian agency for conservation of
biodiversity, and the Brazilian Crustacean Society (SBC) to systematically collate
specific data for these species and to determine their risks of extinction. The IUCN
Red List Categories and Criteria were applied to 130 candidate species, following
IUCN Red List Guidelines. Assessments to determine the risk of extinction were
conducted during a three-day workshop held in Brasília in September 2010, which
brought together about 30 experts to share information about species and threats. A
total of 14 species (11.6%), 12 of them endemic to Brazil, qualified for one of the
three Red List categories of threat (CR, EN, or VU). Twenty-five species (20.8%)
were listed as Data Deficient, and because of this lack of data the extinction risk for
crustaceans may be under-estimated. IUCN Criterion B was most often used during
the assessments (85%), and the main threats identified are associated with removal
of riparian forest causing siltation, and discharge of domestic, urban, industrial, and
agricultural effluents, degrading water quality, as well as uncontrolled fishery activities.
The South Atlantic hydrological basin contains the largest number of threatened
species, which indicates that increased attention from agencies, institutions, and
researchers is needed to develop appropriate strategies and regulations to aid in their
conservation.
under the Categories and Criteria of the IUCN Red List of Threatened Species at
the regional level. This study represents an effort of the Chico Mendes Institute
for Biodiversity Conservation (ICMBio), the Brazilian agency for conservation of
biodiversity, and the Brazilian Crustacean Society (SBC) to systematically collate
specific data for these species and to determine their risks of extinction. The IUCN
Red List Categories and Criteria were applied to 130 candidate species, following
IUCN Red List Guidelines. Assessments to determine the risk of extinction were
conducted during a three-day workshop held in Brasília in September 2010, which
brought together about 30 experts to share information about species and threats. A
total of 14 species (11.6%), 12 of them endemic to Brazil, qualified for one of the
three Red List categories of threat (CR, EN, or VU). Twenty-five species (20.8%)
were listed as Data Deficient, and because of this lack of data the extinction risk for
crustaceans may be under-estimated. IUCN Criterion B was most often used during
the assessments (85%), and the main threats identified are associated with removal
of riparian forest causing siltation, and discharge of domestic, urban, industrial, and
agricultural effluents, degrading water quality, as well as uncontrolled fishery activities.
The South Atlantic hydrological basin contains the largest number of threatened
species, which indicates that increased attention from agencies, institutions, and
researchers is needed to develop appropriate strategies and regulations to aid in their
conservation.