Comparison of Two Biometric Methods for Nonlethal Sex Determination of Alligator Gars
| Autor: | Dusty L. McDonald, J. Warren Schlechte, Daniel J. Daugherty |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Veterinary medicine education.field_of_study biology Biometrics 010604 marine biology & hydrobiology Alligator Population 04 agricultural and veterinary sciences Anatomy Aquatic Science biology.organism_classification 01 natural sciences Alligator gar Discriminant function analysis biology.animal 040102 fisheries 0401 agriculture forestry and fisheries Fish Atractosteus education Ecology Evolution Behavior and Systematics |
| Zdroj: | Transactions of the American Fisheries Society. 147:711-715 |
| ISSN: | 0002-8487 |
| DOI: | 10.1002/tafs.10046 |
| Popis: | McDonald et al. (2013) proposed a morphometry-based method for nonlethal sex prediction of the Alligator Gar Atractosteus spatula. Their method correctly predicted sex to 93% of males and 72% of females tested, but failed to predict the sex of 21% of fish. The authors noted that the method was primarily developed using immature fish from a single Texas population, and as such, recommended further validation and refinement using fish from a broad range of sizes and systems. Therefore, we tested the McDonald et al. (2013) method using 149 fish (standard length (SL) range, 707–1,920 mm) collected from seven Texas populations. Sex prediction based on the McDonald et al. (2013) method improved for both sexes (93% of males and 97% of females); however, sex still could not be predicted for 29% of fish. As a result, we explored the use of a cross-validated, discriminant function analysis (DFA), using the morphometric ratios developed by McDonald et al. (2013), to improve our ability to predict sex of samp... |
| Databáze: | OpenAIRE |
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