1. The integument of the nonamphibious gobyGobionellus oceanicus: Its functional morphology and respiratory capacity
- Author
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Letícia Aguilar, André Luis da Cruz, Rebeca Nuno Leite, and Cleomárcia Almeida Ferreira
- Subjects
Gills ,0106 biological sciences ,food.ingredient ,Zoology ,Biology ,010603 evolutionary biology ,01 natural sciences ,food ,Functional morphology ,Animals ,Respiratory system ,Hypoxia ,Gobionellus ,Facultative ,Respiration ,Goby ,Hypoxia (environmental) ,04 agricultural and veterinary sciences ,biology.organism_classification ,Perciformes ,The integument ,Animal Fins ,040102 fisheries ,0401 agriculture, forestry, and fisheries ,Animal Science and Zoology ,Integument ,Integumentary System ,Developmental Biology - Abstract
Facultative air-breathing fish can exchange respiratory gases using an air-breathing organ (ABO), such as the oral cavity of the integument, during environmental hypoxia. The goby Gobionellus oceanicus inhabits areas subject to environmental hypoxia; however, its ABO is unknown. To investigate the respiratory potential of G. oceanicus, the gill and integument surface area, diffusion capacity, and their diffusion barrier thickness were measured. Our results show that although gill surface area is smaller than observed in other facultative air-breathing fish, but it has all features necessary to perform aquatic gas exchange. Additionally the integument of the palate has a short diffusion barrier thickness and a large calculated O2 -diffusion capacity suggesting that it functions as the ABO.
- Published
- 2018