Head Shape and Drag Force Analysis in Nile Tilapia

Aggregating results from a study analyzing the three-dimensional shape and size of external head surfaces in male and female Nile tilapia (Oreochromis niloticus). It includes data from computational fluid dynamics simulations used to calculate the effect of head morphology on drag force during locomotion. The analysis found that females, which are maternal mouthbrooders, have a 27% larger external head volume than males, resulting in an approximate 15% increase in drag force.

Use Cases

• Compare three-dimensional head shape reconstructions between male and female specimens to quantify sexual dimorphism.
• Analyze the relationship between head volume, head length, and head width measurements and their impact on calculated drag force.
• Model hydrodynamic constraints on head enlargement using computational fluid dynamics simulation results.
• Investigate the trade-off between head morphology for mouthbrooding (e.g., increased volume) and swimming efficiency metrics like drag.

Strengths

• Data is derived from precise three-dimensional body surface reconstructions created from laser scans.
• Findings are quantified with specific metrics, such as a 27% larger head volume in females and an approximate 15% increase in drag force.
• Analysis is focused on a well-studied model species, the Nile tilapia (Oreochromis niloticus).

Limitations

• The dataset scope is limited to one species (Oreochromis niloticus), restricting broader evolutionary comparisons across Cichlidae.
• Sample size for the scanned specimens is not provided, which is critical for assessing statistical power.
• Data represents a specific analytical snapshot from a published study, with no indication of ongoing updates or expansion.

Provenance

Source

Dryad digital repository.

Collection Method

Three-dimensional body surface reconstructions from laser scans and computational fluid dynamics simulations.

Time Range

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Freshness

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Geography

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