Aglomerularism in Harpagifer bispinis: A subantarctic notothenioid fish living at reduced salinity

We investigated the renal morphology, histology and ultrastructure of Harpagifer bispinis, as a first step toward understanding the morpho-functional basis of its adaptation to potentially freezing brackish seawater. Fish were separated into two groups of ten individuals each, and acclimated to 2‰ a...

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Autores principales:	Pérez, Analía Fernanda, Tresguerres, Martín, Luquet, Carlos Marcelo
Publicado:	2003
Materias:	adaptation ecomorphology fish freezing salinity tolerance Harpagifer Harpagifer bispinis
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07224060_v26_n12_p800_Perez http://hdl.handle.net/20.500.12110/paper_07224060_v26_n12_p800_Perez
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_07224060_v26_n12_p800_Perez
record_format	dspace
spelling	paper:paper_07224060_v26_n12_p800_Perez2023-06-08T15:43:30Z Aglomerularism in Harpagifer bispinis: A subantarctic notothenioid fish living at reduced salinity Pérez, Analía Fernanda Tresguerres, Martín Luquet, Carlos Marcelo adaptation ecomorphology fish freezing salinity tolerance Harpagifer Harpagifer bispinis We investigated the renal morphology, histology and ultrastructure of Harpagifer bispinis, as a first step toward understanding the morpho-functional basis of its adaptation to potentially freezing brackish seawater. Fish were separated into two groups of ten individuals each, and acclimated to 2‰ and 38‰ salinity. A study of complete serial sections of the kidney revealed that the nephrons were aglomerular. At the highly convoluted proximal segment two different regions were evident, a feature that has not been previously reported for other aglomerular species. In electron photomicrographs we distinguished light and dark cells in the proximal tubule epithelium, with highly infolded basolateral membranes and closely associated mitochondria. The dark cells also had a large number of mitochondria in the apical region. The intercellular spaces at the epithelium of the proximal tubule were larger in fish acclimated at 2‰ salinity, a modification that might facilitate urine secretion, thus contributing to the survival of an aglomerular fish in a hyposmotic medium. Fil:Pérez, A.F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Tresguerres, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Luquet, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2003 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07224060_v26_n12_p800_Perez http://hdl.handle.net/20.500.12110/paper_07224060_v26_n12_p800_Perez
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	adaptation ecomorphology fish freezing salinity tolerance Harpagifer Harpagifer bispinis
spellingShingle	adaptation ecomorphology fish freezing salinity tolerance Harpagifer Harpagifer bispinis Pérez, Analía Fernanda Tresguerres, Martín Luquet, Carlos Marcelo Aglomerularism in Harpagifer bispinis: A subantarctic notothenioid fish living at reduced salinity
topic_facet	adaptation ecomorphology fish freezing salinity tolerance Harpagifer Harpagifer bispinis
description	We investigated the renal morphology, histology and ultrastructure of Harpagifer bispinis, as a first step toward understanding the morpho-functional basis of its adaptation to potentially freezing brackish seawater. Fish were separated into two groups of ten individuals each, and acclimated to 2‰ and 38‰ salinity. A study of complete serial sections of the kidney revealed that the nephrons were aglomerular. At the highly convoluted proximal segment two different regions were evident, a feature that has not been previously reported for other aglomerular species. In electron photomicrographs we distinguished light and dark cells in the proximal tubule epithelium, with highly infolded basolateral membranes and closely associated mitochondria. The dark cells also had a large number of mitochondria in the apical region. The intercellular spaces at the epithelium of the proximal tubule were larger in fish acclimated at 2‰ salinity, a modification that might facilitate urine secretion, thus contributing to the survival of an aglomerular fish in a hyposmotic medium.
author	Pérez, Analía Fernanda Tresguerres, Martín Luquet, Carlos Marcelo
author_facet	Pérez, Analía Fernanda Tresguerres, Martín Luquet, Carlos Marcelo
author_sort	Pérez, Analía Fernanda
title	Aglomerularism in Harpagifer bispinis: A subantarctic notothenioid fish living at reduced salinity
title_short	Aglomerularism in Harpagifer bispinis: A subantarctic notothenioid fish living at reduced salinity
title_full	Aglomerularism in Harpagifer bispinis: A subantarctic notothenioid fish living at reduced salinity
title_fullStr	Aglomerularism in Harpagifer bispinis: A subantarctic notothenioid fish living at reduced salinity
title_full_unstemmed	Aglomerularism in Harpagifer bispinis: A subantarctic notothenioid fish living at reduced salinity
title_sort	aglomerularism in harpagifer bispinis: a subantarctic notothenioid fish living at reduced salinity
publishDate	2003
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07224060_v26_n12_p800_Perez http://hdl.handle.net/20.500.12110/paper_07224060_v26_n12_p800_Perez
work_keys_str_mv	AT perezanaliafernanda aglomerularisminharpagiferbispinisasubantarcticnotothenioidfishlivingatreducedsalinity AT tresguerresmartin aglomerularisminharpagiferbispinisasubantarcticnotothenioidfishlivingatreducedsalinity AT luquetcarlosmarcelo aglomerularisminharpagiferbispinisasubantarcticnotothenioidfishlivingatreducedsalinity
_version_	1768541898516987904

Aglomerularism in Harpagifer bispinis: A subantarctic notothenioid fish living at reduced salinity

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