Development and Evaluation of an Ultrasound Imaging Reproductive Index Based on the Ovarian Cycle of Channel Catfish, Ictalurus punctatus
| Autor: | Terrence R. Tiersch, Noel D. Novelo |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
animal structures media_common.quotation_subject Physiology Broodstock Aquatic Science 01 natural sciences Aquaculture media_common Estrous cycle biology business.industry 010604 marine biology & hydrobiology fungi Aquatic animal 04 agricultural and veterinary sciences biology.organism_classification Fishery Ictalurus 040102 fisheries 0401 agriculture forestry and fisheries Reproduction business Agronomy and Crop Science Blue catfish Catfish |
| Zdroj: | Journal of the World Aquaculture Society. 47:526-537 |
| ISSN: | 0893-8849 |
| DOI: | 10.1111/jwas.12291 |
| Popis: | Commercial production of hybrid catfish (female channel catfish Ictalurus punctatus × male blue catfish Ictalurus furcatus) is reliant on interdependent biological, environmental, and technical procedures. This study addresses one of these critical components – the evaluation of channel catfish ovarian development based on sonographic analysis. The objectives were to: (1) develop a channel catfish ovarian ultrasonography index, (2) test the effect of the spawning trials on fertilization estimates of fish assessed using the ultrasonography index, and (3) evaluate the expected (hypothesized) and observed outcome of the ultrasonography assessments. Seven ovarian morphology classifications were developed based on ultrasonography of 915 channel catfish (N = 915 images), and 210 females were selected for spawning. The predictions based on the classifications prior to hormone injection showed a significant effect (P < 0.002) on the observed outcomes (viable or nonviable eggs). The probability of correct classification was 0.86–0.89 for Categories 3 (developing), 4 (advanced), and 5 (mature), and 0.93–1.0 for Categories 1 (undeveloped), 2 (underdeveloped), 6 (spawned), and 7 (atretic). The ultrasonography index covered the full range of ovarian dynamics (i.e., recrudescence through spawning). It provided an unobtrusive, direct method of ovarian assessment to work toward improving the efficiency of broodstock selection. |
| Databáze: | OpenAIRE |
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