The pineal complex in the cichlid Cichlasoma dimerus: Effect of different photoperiods on its cell morphology

This research describes the pineal complex histology in juvenile and adult Cichlasoma dimerus, and the effect of different photoperiods on its cell morphology. In both juveniles and adults, the pineal complex of C. dimerus has three components: the pineal organ, consisting of a pineal vesicle (PV) a...

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Detalles Bibliográficos
Autores principales: Ramallo, Martín R., Tubert, Cecilia, Pandolfi, Matías
Publicado: 2014
Materias:
Histology
Karyometry
Opsins
Pineaolocytes
Cichlasoma
Cichlidae
Pisces
Teleostei
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00221112_v85_n3_p605_Birba
http://hdl.handle.net/20.500.12110/paper_00221112_v85_n3_p605_Birba
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00221112_v85_n3_p605_Birba
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spelling paper:paper_00221112_v85_n3_p605_Birba2023-06-08T14:45:53Z The pineal complex in the cichlid Cichlasoma dimerus: Effect of different photoperiods on its cell morphology Ramallo, Martín R. Tubert, Cecilia Pandolfi, Matías Histology Karyometry Opsins Pineaolocytes Cichlasoma Cichlidae Pisces Teleostei This research describes the pineal complex histology in juvenile and adult Cichlasoma dimerus, and the effect of different photoperiods on its cell morphology. In both juveniles and adults, the pineal complex of C. dimerus has three components: the pineal organ, consisting of a pineal vesicle (PV) and a pineal stalk, the parapineal organ and the dorsal sac. Although a strong morphological resemblance exists between the two stages, different synthesis patterns of cone and rod opsins were detected in the two life stages. An effect of the photoperiod length was observed on putative pinealocytes' activity from the PV, measured indirectly through nuclear area morphometry. Individuals exposed to a natural photoperiod (14L:10D) had smaller nuclear areas (mean±s.e. = 13·82±1·52 μm2) than those exposed to a short photoperiod (8:16) (21·45±2·67 μm2; P<0·001). Eventually, the nuclear area of pinealocytes could be used as a putative indicator of melatonin synthesis in fishes where it is difficult to obtain plasma samples, e.g. due to its small size or age. This work constitutes one of the few comparative descriptions of the pineal complex of juvenile and adult teleost and suggests potential approaches for the study of melatonin synthesis in fish larvae or small adult fishes. © 2014 The Fisheries Society of the British Isles. Fil:Ramallo, M.R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Tubert, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Pandolfi, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2014 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00221112_v85_n3_p605_Birba http://hdl.handle.net/20.500.12110/paper_00221112_v85_n3_p605_Birba
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Histology
Karyometry
Opsins
Pineaolocytes
Cichlasoma
Cichlidae
Pisces
Teleostei
spellingShingle Histology
Karyometry
Opsins
Pineaolocytes
Cichlasoma
Cichlidae
Pisces
Teleostei
Ramallo, Martín R.
Tubert, Cecilia
Pandolfi, Matías
The pineal complex in the cichlid Cichlasoma dimerus: Effect of different photoperiods on its cell morphology
topic_facet Histology
Karyometry
Opsins
Pineaolocytes
Cichlasoma
Cichlidae
Pisces
Teleostei
description This research describes the pineal complex histology in juvenile and adult Cichlasoma dimerus, and the effect of different photoperiods on its cell morphology. In both juveniles and adults, the pineal complex of C. dimerus has three components: the pineal organ, consisting of a pineal vesicle (PV) and a pineal stalk, the parapineal organ and the dorsal sac. Although a strong morphological resemblance exists between the two stages, different synthesis patterns of cone and rod opsins were detected in the two life stages. An effect of the photoperiod length was observed on putative pinealocytes' activity from the PV, measured indirectly through nuclear area morphometry. Individuals exposed to a natural photoperiod (14L:10D) had smaller nuclear areas (mean±s.e. = 13·82±1·52 μm2) than those exposed to a short photoperiod (8:16) (21·45±2·67 μm2; P<0·001). Eventually, the nuclear area of pinealocytes could be used as a putative indicator of melatonin synthesis in fishes where it is difficult to obtain plasma samples, e.g. due to its small size or age. This work constitutes one of the few comparative descriptions of the pineal complex of juvenile and adult teleost and suggests potential approaches for the study of melatonin synthesis in fish larvae or small adult fishes. © 2014 The Fisheries Society of the British Isles.
author Ramallo, Martín R.
Tubert, Cecilia
Pandolfi, Matías
author_facet Ramallo, Martín R.
Tubert, Cecilia
Pandolfi, Matías
author_sort Ramallo, Martín R.
title The pineal complex in the cichlid Cichlasoma dimerus: Effect of different photoperiods on its cell morphology
title_short The pineal complex in the cichlid Cichlasoma dimerus: Effect of different photoperiods on its cell morphology
title_full The pineal complex in the cichlid Cichlasoma dimerus: Effect of different photoperiods on its cell morphology
title_fullStr The pineal complex in the cichlid Cichlasoma dimerus: Effect of different photoperiods on its cell morphology
title_full_unstemmed The pineal complex in the cichlid Cichlasoma dimerus: Effect of different photoperiods on its cell morphology
title_sort pineal complex in the cichlid cichlasoma dimerus: effect of different photoperiods on its cell morphology
publishDate 2014
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00221112_v85_n3_p605_Birba
http://hdl.handle.net/20.500.12110/paper_00221112_v85_n3_p605_Birba
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