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| Duncan,Wallice Paxiúba; Silva,Maria Isabel da; Fernandes,Marisa Narciso. |
| This comparative study of gill morphometrics in near-term embryos of freshwater stingray potamotrygonids examines gill dimensions in relation to neonatal lifestyle and habitat. In embryos of the potamotrygonids Paratrygon aiereba, Plesiotrygon iwamae, Potamotrygon motoro, Potamotrygon orbignyi, and cururu ray Potamotrygon sp. the number and length of filaments, total gill surface area, mass-specific surface area, water-blood diffusion distance, and anatomical diffusion factor were analysed. In all potamotrygonids, the 3rd branchial arch possessed a larger respiratory surface than the other gill arches. Larger embryos had more gill surface area and large spiracles, which are necessary to maintain the high oxygen uptake needed due to their larger body size.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Foetus; Gill morphology; Hypoxia tolerance; Potamotrygonid; Respiratory area. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000100123 |
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| Zhang, Yangfan; Timmerhaus, Gerrit; Anttila, Katja; Mauduit, Florian; Jorgensen, Sven Martin; Kristensen, Torstein; Claireaux, Guy; Takle, Harald; Farrell, Anthony P.. |
| Commercially selective breeding of Atlantic salmon (Salmo salar) primarily for rapid growth may compromise cardiorespiratory robustness and its related phenotypes. Therefore, a suite of respiratory indices was used to evaluate aerobic capacity and hypoxia tolerance to test the hypothesis that exercise training can improve the athletic robustness in both domesticated and wild strains of Atlantic salmon, but with the domesticated strain having a less cardiorespiratory plasticity and a lower athletic robustness than the wild strain. We also tested a second hypothesis that a constant acceleration screening protocol should segregate fish according to athletic robustness based on their swimming ability. These hypotheses were tested with parr from Bolaks... |
| Tipo: Text |
Palavras-chave: Athletic robustness; Atlantic salmon; Domestication; Exercise training; Hypoxia tolerance; Respiratory performance. |
| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00334/44518/44214.pdf |
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