Glyceroneogenesis in the hepatopancreas of the crab Neohelice granulata : Diet, starvation and season effects

2017 ◽  
Vol 211 ◽  
pp. 1-7 ◽  
Author(s):  
E. Sarapio ◽  
J.T. Santos ◽  
J.F.A. Model ◽  
L.S. De Fraga ◽  
A.S. Vinagre ◽  
...  
Keyword(s):  
Neohelice Granulata

A baseline study of microplastics in the burrowing crab (Neohelice granulata) from a temperate southwestern Atlantic estuary

2020 ◽  
Vol 150 ◽  
pp. 110686 ◽  
Author(s):  
Diana M. Villagran ◽  
Daniela M. Truchet ◽  
Natalia S. Buzzi ◽  
Ana D. Forero Lopez ◽  
Melisa D. Fernández Severini
Keyword(s):  
Southwestern Atlantic ◽  
Neohelice Granulata ◽  
Baseline Study ◽  
Burrowing Crab

scholarly journals Learning a non-neutral conditioned stimulus: place preference in the crab Neohelice granulata

2020 ◽  
Author(s):  
Martín Klappenbach ◽  
Candela Medina ◽  
Ramiro Freudenthal
Keyword(s):  
Conditioned Stimulus ◽  
Food Pellet ◽  
Place Preference ◽  
Food Sources ◽  
Long Term Memory ◽  
Target Area ◽  
Neohelice Granulata ◽  
Preference Task ◽  
In The Wild ◽  
First Time

AbstractIn the wild, being able to recognize and remember specific locations related to food sources and the associated attributes of landmarks is a cognitive trait important for survival. In the present work we show that the crab Neohelice granulata can be trained to associate a specific environment with an appetitive reward in a conditioned place preference task. After a single training trial, when the crabs were presented with a food pellet in the target quadrant of the training arena, they were able to form a long-term memory related to the event. This memory was evident at least 24 h after training and was protein-synthesis dependent. Importantly, the target area of the arena proved to be a non-neutral environment, given that animals initially avoided the target quadrant. In the present work we introduce for the first time an associative one-trial memory paradigm including a conditioned stimulus with a clear valence performed in a crustacean.

scholarly journals Estudo do fluxo larval de Braquiúros no Canal de acesso ao estuário da Lagoa dos Patos, Rio Grande, Rio Grande do Sul, Brasil

2012 ◽  
Vol 40 (2) ◽  
Author(s):  
Pedro Henrique Viana De ARAÚJO ◽  
José Henrique MUELBERT ◽  
Danilo Koetz De CALAZANS
Keyword(s):  
Rio Grande ◽  
Rio Grande Do Sul ◽  
Rhithropanopeus Harrisii ◽  
Neohelice Granulata

Dentre os grupos faunísticos de ambientes estuarinos destacam-se os braquiúros que apresentam duas fases larvais planctônicas. No estuário da Lagoa dos Patos são reportadas 23 espécies de larvas que estão sujeitas aos processos físicos de circulação das correntes. Foram coletadas amostras físicas e biológicas durante 24 horas a cada três horas com o objetivo de estudar o fluxo larval no Canal de Acesso ao estuário. O Canal se encontrava em sistema de vazão, ventos de nordeste e nível acima de zero durante o estudo. Foram identificadas larvas de dez espécies de braquiúros que estavam continuamente sendo exportadas para o oceano adjacente preferencialmente pela região do Molhe Oeste na camada da superfície. O fluxo total de larvas foi 623.630 ind.100m-2 s -1 e as espécies mais abundantes foram Armases rubripes e Neohelice granulata. Foi observada a retenção larval de Rhithropanopeus harrisii e o primeiro registro de zoé 1 de Stenorhynchus seticornis no interior da lagoa. Palavras chave: Lagoa dos Patos, Braquiúros, Larvas, Fluxo, Exportação

Imbalances in the male reproductive function of the estuarine crab Neohelice granulata, caused by glyphosate

2019 ◽  
Vol 182 ◽  
pp. 109405 ◽  
Author(s):  
Ivana S. Canosa ◽  
Marina Zanitti ◽  
Noelia Lonné ◽  
Daniel A. Medesani ◽  
Laura S. López Greco ◽  
...  
Keyword(s):  
Reproductive Function ◽  
Neohelice Granulata ◽  
Male Reproductive Function

Two sodium pumps in the hepatopancreas of the intertidal euryhaline crab Neohelice granulata: biochemical characteristics and differential modulation after feeding

2018 ◽  
Vol 96 (6) ◽  
pp. 576-584 ◽  
Author(s):  
E. Méndez ◽  
C. Caruso Neves ◽  
A.A. López Mañanes
Keyword(s):  
Atpase Activity ◽  
Environmental Conditions ◽  
Sodium Pump ◽  
Differential Modulation ◽  
Model Species ◽  
Biochemical Characteristics ◽  
Neohelice Granulata ◽  
Sodium Pumps ◽  
Total Inhibition ◽  
Occurrence Characteristics

No study has been done on the existence, biochemical characteristics, and modulation of K+-independent ouabain-insensitive Na+ ATPase activity (the second sodium pump) in the digestive tract of intertidal euryhaline crabs and moreover on the coexistence and modulation under distinct physiological and (or) environmental conditions of different sodium pumps. We determined the occurrence, characteristics, and responses at different times (0, 1, 24, 48, and 120 h) after feeding upon distinct salinities of Na+ ATPase activity and Na+/K+ ATPase in the hepatopancreas of Neohelice granulata (Dana, 1851), which is a model species. The stimulation by Na+ under total inhibition of Na+/K+ ATPase activity revealed the occurrence of Na+ ATPase activity that was totally inhibited by 2 mmol·L–1 furosemide, exhibits Michaelis–Menten kinetics for ATP (apparent Km = 0.52 ± 0.16 mmol·L–1), and highest activity at around pH 7.4. In crabs acclimated to 35 psu (osmoconforming conditions), Na+ ATPase activity was highly increased (about 15-fold) (532 ± 58 nmol Pi·mg protein−1·min−1) in the hepatopancreas 48 h after feeding. In 10 psu (hyper-regulating conditions), Na+ ATPase activity decreased in the hepatopancreas 24 h after feeding (7 ± 9 nmol Pi·mg protein−1·min−1) and recovered initial values after 48 h (24 ± 35 nmol Pi·mg protein−1·min−1). Unlike Na+ ATPase, Na+/K+ ATPase activity did not change after feeding at any salinity, suggesting the specific modulation of the second sodium pump and its role in postprandial adjustments in the hepatopancreas.

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