THYMIC DEVELOPMENT IN TWO SPECIES O F MARINE TELEOST; AN ANTARCTIC SILVERFISH, PLEURAGRAMMA ANT-
Abstract: The paired thymic organs of post-larval, juvenile and adult specimens of the Antarctic silverfish, Pleuragramma antarcticum, and sea bass, Dicentrarchus labrax, were examined histologically. In both species the paired thymic anlagen were infiltrated by small lymphocytes at the earliest pos...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.533.5349 2023-05-15T13:56:02+02:00 THYMIC DEVELOPMENT IN TWO SPECIES O F MARINE TELEOST; AN ANTARCTIC SILVERFISH, PLEURAGRAMMA ANT- Arcticum Boulenger A Warmer Water Sea Bass Julian G. O'neill The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.533.5349 http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/1989-ONeil.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.533.5349 http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/1989-ONeil.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/1989-ONeil.pdf text ftciteseerx 2016-04-03T00:00:55Z Abstract: The paired thymic organs of post-larval, juvenile and adult specimens of the Antarctic silverfish, Pleuragramma antarcticum, and sea bass, Dicentrarchus labrax, were examined histologically. In both species the paired thymic anlagen were infiltrated by small lymphocytes at the earliest post-larval stages. This was more advanced in D. labrax, with the formation of trabeculae from the sub-epithelial connective tissues (SECT). A more advanced thymic development was noted for juvenile D. labrax, trabe-culae were prominent and thymic zonation was distinct. In this species there was a greater infiltration of epithelial mucous cells and macrophages into the inner thymic area. A further distinction, not observed in P. antarcticum, was the presence of melano-macrophage centres and large myoid cells, indicating a more advanced thymic involution in the warmer-water species. Thymic progression at the adult stage differed in the two species. D. labrax did not show an increased involution of the thymic zones; however, an increased trabecular and SECT development divided the thymus into discrete lobules. In contrast, the thymic trabeculae were lost in P. antarcticum and the organ regressed, leaving a few aggregations of small lymphocytes in the outer thymic zone. 1. Text Antarc* Antarctic Antarctic silverfish Unknown Antarctic The Antarctic |
institution |
Open Polar |
collection |
Unknown |
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ftciteseerx |
language |
English |
description |
Abstract: The paired thymic organs of post-larval, juvenile and adult specimens of the Antarctic silverfish, Pleuragramma antarcticum, and sea bass, Dicentrarchus labrax, were examined histologically. In both species the paired thymic anlagen were infiltrated by small lymphocytes at the earliest post-larval stages. This was more advanced in D. labrax, with the formation of trabeculae from the sub-epithelial connective tissues (SECT). A more advanced thymic development was noted for juvenile D. labrax, trabe-culae were prominent and thymic zonation was distinct. In this species there was a greater infiltration of epithelial mucous cells and macrophages into the inner thymic area. A further distinction, not observed in P. antarcticum, was the presence of melano-macrophage centres and large myoid cells, indicating a more advanced thymic involution in the warmer-water species. Thymic progression at the adult stage differed in the two species. D. labrax did not show an increased involution of the thymic zones; however, an increased trabecular and SECT development divided the thymus into discrete lobules. In contrast, the thymic trabeculae were lost in P. antarcticum and the organ regressed, leaving a few aggregations of small lymphocytes in the outer thymic zone. 1. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Arcticum Boulenger A Warmer Water Sea Bass Julian G. O'neill |
spellingShingle |
Arcticum Boulenger A Warmer Water Sea Bass Julian G. O'neill THYMIC DEVELOPMENT IN TWO SPECIES O F MARINE TELEOST; AN ANTARCTIC SILVERFISH, PLEURAGRAMMA ANT- |
author_facet |
Arcticum Boulenger A Warmer Water Sea Bass Julian G. O'neill |
author_sort |
Arcticum Boulenger |
title |
THYMIC DEVELOPMENT IN TWO SPECIES O F MARINE TELEOST; AN ANTARCTIC SILVERFISH, PLEURAGRAMMA ANT- |
title_short |
THYMIC DEVELOPMENT IN TWO SPECIES O F MARINE TELEOST; AN ANTARCTIC SILVERFISH, PLEURAGRAMMA ANT- |
title_full |
THYMIC DEVELOPMENT IN TWO SPECIES O F MARINE TELEOST; AN ANTARCTIC SILVERFISH, PLEURAGRAMMA ANT- |
title_fullStr |
THYMIC DEVELOPMENT IN TWO SPECIES O F MARINE TELEOST; AN ANTARCTIC SILVERFISH, PLEURAGRAMMA ANT- |
title_full_unstemmed |
THYMIC DEVELOPMENT IN TWO SPECIES O F MARINE TELEOST; AN ANTARCTIC SILVERFISH, PLEURAGRAMMA ANT- |
title_sort |
thymic development in two species o f marine teleost; an antarctic silverfish, pleuragramma ant- |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.533.5349 http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/1989-ONeil.pdf |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctic silverfish |
genre_facet |
Antarc* Antarctic Antarctic silverfish |
op_source |
http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/1989-ONeil.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.533.5349 http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/1989-ONeil.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766263254271655936 |