Influence of reduced salinity on the histochemical fiber type composition of the claw closer muscle of two estuarine crab species, Cyrtograpsus angulatus and Neohelice granulata (Decapoda: Varunidae)

The estuarine crustaceans are exposed to frequent and abrupt environmental salinity changes that involve adjustments at different levels in muscle tissue. The histochemical composition of fiber types of the claw closer muscle of Cyrtograpsus angulatus and Neohelice granulata (Dana, 1851) under hyper...

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Autores principales: Longo, M.V., Díaz, A.O.
Formato: JOUR
Materias:
Euryhaline crabs
Histochemistry
Hyper regulation
Muscle fibers
Salinity stress
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_07179367_v35_n2_p533_Longo
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_07179367_v35_n2_p533_Longo2023-10-03T15:36:30Z Influence of reduced salinity on the histochemical fiber type composition of the claw closer muscle of two estuarine crab species, Cyrtograpsus angulatus and Neohelice granulata (Decapoda: Varunidae) Longo, M.V. Díaz, A.O. Euryhaline crabs Histochemistry Hyper regulation Muscle fibers Salinity stress The estuarine crustaceans are exposed to frequent and abrupt environmental salinity changes that involve adjustments at different levels in muscle tissue. The histochemical composition of fiber types of the claw closer muscle of Cyrtograpsus angulatus and Neohelice granulata (Dana, 1851) under hyper regulatory conditions was analyzed. Cryosections of the muscle were treated with myosin-adenosine triphosphatase (m-ATPase), succinic dehydrogenase (SDH), periodic acid Schiff (PAS) and Sudan Black B. The mean diameters, the relative area and the proportion of each muscle fiber type were calculated. Types I and IV would belong to ‘extreme’ groups, whereas types II and III would be considered ‘intermediate’. Type I fibers were large and exhibited a weak reaction to all techniques; type IV fibers were small and reacted strongly to histochemical tests. Types II and III prevailed in C. angulatus whereas type II predominated in N. granulata. Type IV fibers were absent in C. angulatus and scarce in N. granulata. The claw closer muscle of N. granulata and C. angulatus exhibited differential responses under reduced salinity at a histochemical level. Therefore, the existence of different adjustment mechanisms facing salinity stress is suggested. © 2017, Universidad de la Frontera. All rights reserved. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_07179367_v35_n2_p533_Longo
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Euryhaline crabs
Histochemistry
Hyper regulation
Muscle fibers
Salinity stress
spellingShingle Euryhaline crabs
Histochemistry
Hyper regulation
Muscle fibers
Salinity stress
Longo, M.V.
Díaz, A.O.
Influence of reduced salinity on the histochemical fiber type composition of the claw closer muscle of two estuarine crab species, Cyrtograpsus angulatus and Neohelice granulata (Decapoda: Varunidae)
topic_facet Euryhaline crabs
Histochemistry
Hyper regulation
Muscle fibers
Salinity stress
description The estuarine crustaceans are exposed to frequent and abrupt environmental salinity changes that involve adjustments at different levels in muscle tissue. The histochemical composition of fiber types of the claw closer muscle of Cyrtograpsus angulatus and Neohelice granulata (Dana, 1851) under hyper regulatory conditions was analyzed. Cryosections of the muscle were treated with myosin-adenosine triphosphatase (m-ATPase), succinic dehydrogenase (SDH), periodic acid Schiff (PAS) and Sudan Black B. The mean diameters, the relative area and the proportion of each muscle fiber type were calculated. Types I and IV would belong to ‘extreme’ groups, whereas types II and III would be considered ‘intermediate’. Type I fibers were large and exhibited a weak reaction to all techniques; type IV fibers were small and reacted strongly to histochemical tests. Types II and III prevailed in C. angulatus whereas type II predominated in N. granulata. Type IV fibers were absent in C. angulatus and scarce in N. granulata. The claw closer muscle of N. granulata and C. angulatus exhibited differential responses under reduced salinity at a histochemical level. Therefore, the existence of different adjustment mechanisms facing salinity stress is suggested. © 2017, Universidad de la Frontera. All rights reserved.
format JOUR
author Longo, M.V.
Díaz, A.O.
author_facet Longo, M.V.
Díaz, A.O.
author_sort Longo, M.V.
title Influence of reduced salinity on the histochemical fiber type composition of the claw closer muscle of two estuarine crab species, Cyrtograpsus angulatus and Neohelice granulata (Decapoda: Varunidae)
title_short Influence of reduced salinity on the histochemical fiber type composition of the claw closer muscle of two estuarine crab species, Cyrtograpsus angulatus and Neohelice granulata (Decapoda: Varunidae)
title_full Influence of reduced salinity on the histochemical fiber type composition of the claw closer muscle of two estuarine crab species, Cyrtograpsus angulatus and Neohelice granulata (Decapoda: Varunidae)
title_fullStr Influence of reduced salinity on the histochemical fiber type composition of the claw closer muscle of two estuarine crab species, Cyrtograpsus angulatus and Neohelice granulata (Decapoda: Varunidae)
title_full_unstemmed Influence of reduced salinity on the histochemical fiber type composition of the claw closer muscle of two estuarine crab species, Cyrtograpsus angulatus and Neohelice granulata (Decapoda: Varunidae)
title_sort influence of reduced salinity on the histochemical fiber type composition of the claw closer muscle of two estuarine crab species, cyrtograpsus angulatus and neohelice granulata (decapoda: varunidae)
url http://hdl.handle.net/20.500.12110/paper_07179367_v35_n2_p533_Longo
work_keys_str_mv AT longomv influenceofreducedsalinityonthehistochemicalfibertypecompositionoftheclawclosermuscleoftwoestuarinecrabspeciescyrtograpsusangulatusandneohelicegranulatadecapodavarunidae
AT diazao influenceofreducedsalinityonthehistochemicalfibertypecompositionoftheclawclosermuscleoftwoestuarinecrabspeciescyrtograpsusangulatusandneohelicegranulatadecapodavarunidae
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