Early sexing techniques in Lophiosilurus alexandri (Steindachner, 1876), a freshwater carnivorous catfish
| Autor: | Walisson de Souza e Silva, Glauco Vinício Chaves, Deliane Cristina Costa, Valentim Arabicano Gheller, Gustavo Soares da Costa Julio, Ronald Kennedy Luz, Luis Gustavo Figueiredo, Reinaldo Melillo Filho |
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| Rok vydání: | 2015 |
| Předmět: |
0106 biological sciences
Male medicine.medical_specialty Sex Determination Analysis Biometry media_common.quotation_subject 010607 zoology Lophiosilurus alexandri Fresh Water Sexing Biology 01 natural sciences Catheterization Food Animals Urethra medicine Juvenile Animals Sex organ Small Animals Gonads Survival rate Catfishes media_common Equine 04 agricultural and veterinary sciences biology.organism_classification Surgery medicine.anatomical_structure 040102 fisheries 0401 agriculture forestry and fisheries Animal Science and Zoology Female Laparoscopy Reproduction Catfish |
| Zdroj: | Theriogenology. 86(6) |
| ISSN: | 1879-3231 |
| Popis: | This study aimed to evaluate sexing techniques for juvenile Lophiosilurus alexandri. With this aim, we evaluated three techniques: coelioscopy, performed with the use of video surgery equipment; coeliotomy, a surgical procedure for direct visualization of the gonads; and sex determination using a urethral probe to compare the genital papillae. For coelioscopy, the survival rate was 100% 30 days after the procedure, and the fish restarted eating 10 days after surgery. This technique resulted in a 100% correct identification of individuals identified as females, whereas for males, it was 66.6%. There was no significant difference between males and females for anesthesia induction and recovery times. However, the procedure took longer for males because of the difficulty in observing the gonads, which can be attributed to the large amount of visceral fat in males. Coeliotomy also resulted in a 100% survival rate 30 days after surgery, and the efficiency of this technique was 96.3% for males and 93.9% for females. The fish restarted eating between 10 and 14 days after surgery, and there were no significant differences between males and females for anesthesia induction and recovery times for the surgical procedure to visualize the gonads (P > 0.05). The urethral probe technique was less efficient with an accuracy rate of 67.8% and 81.8% for males and females, respectively. We conclude that coeliotomy was more efficient for sexing both sexes of juvenile L. alexandri. |
| Databáze: | OpenAIRE |
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