Egg predation in Antarctic fish: The ingestion by Notothenia coriiceps of an entire Trematomus bernacchii spawn identified by molecular techniques

Author(s):  
Manuel Novillo ◽  
Thomas Desvignes ◽  
Eugenia Moreira ◽  
Esteban Barrera-Oro
2007 ◽  
Vol 24 (1) ◽  
pp. 33-40 ◽  
Author(s):  
Lucélia Donatti ◽  
Edith Fanta

The Antarctic fish Notothenia coriiceps Richardson, 1844 lives in an environment of daily and annual photic variation and retina cells have to adjust morphologically to environmental luminosity. After seven day dark or seven day light acclimation of two groups of fish, retinas were extracted and processed for light and transmission electron microscopy. In seven day dark adapted, retina pigment epithelium melanin granules were aggregated at the basal region of cells, and macrophages were seen adjacent to the apical microvilli, between the photoreceptors. In seven day light adapted epithelium, melanin granules were inside the apical microvilli of epithelial cells and macrophages were absent. The supranuclear region of cones adapted to seven day light had less electron dense cytoplasm, and an endoplasmic reticulum with broad tubules. The mitochondria in the internal segment of cones adapted to seven day light were larger, and less electron dense. The differences in the morphology of cones and pigment epithelial cells indicate that N. coriiceps has retinal structural adjustments presumably optimizing vision in different light conditions.


Polar Biology ◽  
1998 ◽  
Vol 20 (6) ◽  
pp. 404-408 ◽  
Author(s):  
M. Márquez ◽  
C. Vodopivez ◽  
R. Casaux ◽  
A. Curtosi

1989 ◽  
Vol 179 (3) ◽  
pp. 707-713 ◽  
Author(s):  
Rossana D'AVINO ◽  
Carla CARUSO ◽  
Mario ROMANO ◽  
Laura CAMARDELLA ◽  
Bruno RUTIGLIANO ◽  
...  

Polar Biology ◽  
2005 ◽  
Vol 28 (4) ◽  
pp. 326-328 ◽  
Author(s):  
Jos� Roberto Machado Cunha da Silva ◽  
Laercio Ribeiro Porto-Neto ◽  
Jo�o Carlos Shimada Borges ◽  
Bernard Ernesto Jensch-Junior

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