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Free Content Gill specializations in high-performance pelagic teleosts, with reference to striped marlin (Tetrapturus audax) and wahoo (Acanthocybium solandri)

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Abstract:

Analysis of the gill structure of striped marlin, Tetrapturus audax (Philippi, 1887), and wahoo, Acanthocybium solandri (Cuvier, 1832), demonstrates similarities to tunas (family Scombridae) in the presence of gill specializations to maintain rigidity during fast, sustainable swimming and to permit the O2 uptake required by high aerobic performance. For ram-gill ventilators such as tunas, wahoo, and striped marlin, a rigid gill structure prevents lamellar deformation during fast water flow. In tunas, lamellar fusions bind adjacent lamellae on the same filament to opposing lamellae of the neighboring filament. Examination of striped marlin and wahoo gill structure demonstrates a previously undescribed inter-lamellar fusion which binds juxtaposed lamellae on the same filament, but does not connect to opposing lamellae of the adjacent filament. Lamellar thicknesses and the water-blood barrier distances in striped marlin and wahoo are comparable to those of tunas and among the smallest recorded. Vascular replica casts reveal that striped marlin lamellar vascular channels are similar to tunas in having a diagonal progression that reduces lamellar vascular resistance. Wahoo lamellar channels, however, have a linear pattern similar to most other teleosts.

Document Type: Research Article

Publication date: 2006-11-01

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  • The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.
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