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Silvatti B, Granato TM, Jorge-Neto PN, Luppi MMCP, Reisfeld LC, Henrique PC, Padilha FLA, Leite RF, Losano JDDA, Kawai GKV, Nichi M, Pizzutto CS. Sperm evaluation and morphological description of male genitalia of meerkats (Suricata suricatta). Anim Reprod Sci 2020; 221:106585. [PMID: 32889408 DOI: 10.1016/j.anireprosci.2020.106585] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 08/20/2020] [Accepted: 08/21/2020] [Indexed: 02/06/2023]
Abstract
In ex situ conditions, little is known about the reproductive biology of meerkats. The aim of present study was to describe the morphological aspects of male genital organs and accessory glands using macroscopic evaluation, ultrasonography, and radiography, as well as describing semen characteristics post-electroejaculation. The results indicated anatomical characteristics of meerkats are very similar to those of cats, having a prostate, accessory bulbourethral glands, and an elongated and radiopaque structure in the penis, which is indicative of there being a baculum. The testicular volume was 0.81 cm³ (± 0.10) and the relative testis weight was 1.37 cm³/kg (± 0.15). Both testicles are present in the scrotum, which has an ellipsoidal shape, homogeneous texture, hypoechoic parenchyma and are encased in a hyperechoic tunica albuginea. Electroejaculation was effectively induced in all animals for semen collection with utilization of medetomidine and ketamine. The values semen samples variables were as follows for volume - 0.125 ± 0.193 mL, motility - 19.8 ± 18.6 %, vigor - 1.9 ± 1.0, concentration - 40.5 ± 25.2 × 106 sperm/mL and morphologically normal sperm - 10.8 ± 6.6 %. This is the first study in which there is a description of morphological and imaging aspects of the male reproductive tracts of meerkats, as well as the seminal characteristics after using electroejaculation for semen collection. Knowledge of anatomical and seminal characteristics is essential for implementation of assisted reproduction programs, as well as reproductive management in the species.
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Affiliation(s)
- Bruna Silvatti
- Department of Animal Reproduction, Faculty of Veterinary Medicine and Husbandry, University of São Paulo, São Paulo, SP, Brazil.
| | | | - Pedro Nacib Jorge-Neto
- Department of Animal Reproduction, Faculty of Veterinary Medicine and Husbandry, University of São Paulo, São Paulo, SP, Brazil
| | | | | | | | | | - Roberta Ferreira Leite
- Department of Animal Reproduction, Faculty of Veterinary Medicine and Husbandry, University of São Paulo, São Paulo, SP, Brazil
| | - João Diego de Agostini Losano
- Department of Animal Reproduction, Faculty of Veterinary Medicine and Husbandry, University of São Paulo, São Paulo, SP, Brazil
| | - Giulia Kiyomi Vechiato Kawai
- Department of Animal Reproduction, Faculty of Veterinary Medicine and Husbandry, University of São Paulo, São Paulo, SP, Brazil
| | - Marcilio Nichi
- Department of Animal Reproduction, Faculty of Veterinary Medicine and Husbandry, University of São Paulo, São Paulo, SP, Brazil
| | - Cristiane Schilbach Pizzutto
- Department of Animal Reproduction, Faculty of Veterinary Medicine and Husbandry, University of São Paulo, São Paulo, SP, Brazil
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Silva EG, Gonçalves MT, Pinto SC, Soares DM, Oliveira RA, Alves FR, Araújo AV, Guerra PC. Análise quantitativa da ecogenicidade testicular pela técnica do histograma de ovinos da baixada ocidental maranhense. PESQUISA VETERINARIA BRASILEIRA 2015. [DOI: 10.1590/s0100-736x2015000300014] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A ultrassonografia é um método de diagnóstico por imagem que permite a avaliação de diferentes órgãos e estruturas corpóreas de maneira não invasiva. No entanto, a avaliação subjetiva das imagens caracteriza um dos grandes entraves na utilização desta técnica de diagnóstico, havendo necessidade de mecanismos que minimizem a subjetividade do exame e a divergência na interpretação dos achados ultrassonográficos. Desta forma este trabalho objetivou caracterizar a ecogenicidade do parênquima e mediastino testicular de ovinos utilizando a técnica do histograma escala-cinza. Foram utilizados 30 animais divididos em três grupos de acordo com a faixa etária (FE): de três a seis meses (FE1), sete a 12 meses (FE2), 13 a 18 meses (FE3) e realizadas varreduras testiculares nos planos frontal, sagital e transversal, elaborando ao final um histograma a partir das imagens ultrassonográficas. Observou-se que tanto a ecogenicidade do parênquima quanto a do mediastino testicular aumentaram gradativamente com a progressão das idades dos animais, com média e desvio-padrão de 95,00±19,05 e 94,35±18,82 para a ecogenicidade do parênquima do antímero direito e esquerdo, respectivamente, e 127,95±12,97 para o mediastino direito e 126,59±11,78 para o esquerdo. A técnica do histograma escala-cinza demonstrou ser um método eficiente na determinação da ecogenicidade testicular, possibilitando o estabelecimento de padrões de normalidade que venham a auxiliar pesquisas futuras no monitoramento do desenvolvimento testicular bem como na detecção de patologias. Para a regimes exclusivos de criação extensiva, como na baixada maranhense, representa ferramenta valiosa para sua utilização em projetos sociais do Estado que atendem a agricultura familiar.
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