1
|
Barros CHSC, Santos RP, Machado WM, Santos MM, Souza-Junior JBF, Matarazzo SV, Nogueira-Filho SLG, das N Snoeck PP, Silva AR. Impact of environmental variables on some reproductive metrics of white-lipped peccaries (Tayassu pecari) raised in Atlantic Forest of Brazil. Anim Reprod Sci 2023; 252:107230. [PMID: 37054632 DOI: 10.1016/j.anireprosci.2023.107230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 03/31/2023] [Accepted: 04/06/2023] [Indexed: 04/15/2023]
Abstract
Knowledge on male reproductive physiology is essential for the development of effective conservation strategies. This study investigated the influence of environmental variables on certain reproductive metrics in white-lipped peccaries (Tayassu pecari) raised in the Atlantic Forest. After anesthetization, testicular and cauda epididymis biometry were evaluated in nine adult male individuals subjected to electroejaculation. Semen was evaluated for volume, pH, concentration, total number of sperm, sperm morphology, membrane integrity, and kinematic parameters. Concurrently, environmental variables were collected from the day before, for the previous 14 days (estimated for sperm maturation in epididymis), and the period of 51-55 days (corresponding to the spermatogenic cycle) before semen collection. Overall, it was observed that rainfall is the most important environmental variable influencing the reproductive parameters of white-lipped peccaries, being positively correlated with the amplitude of lateral sperm head displacement (ρ = 0.62, P < 0.05) and the appearance of proximal cytoplasmic droplets in sperm (ρ = 0.62, P < 0.05). In addition, the testicular biometry of the species is influenced by the set of environmental variables of air temperature, rainfall, and relative humidity (ρ ≥ 0.60, P < 0.05). On the other hand, epididymal biometric data showed numerous correlations between cauda epididymis metrics and sperm parameters (ρ = 0.68, P < 0.05). This information will be useful to improving conservation strategies for these animals, contributing to their management in captivity and to reintroduction programs, especially in the Atlantic Forest where the species is declining.
Collapse
Affiliation(s)
- Celso H S C Barros
- Laboratory of Animal Reproduction, Universidade Estadual de Santa Cruz (State University of Santa Cruz) - UESC, Ilhéus, BA, Brazil
| | - Romário P Santos
- Laboratory of Animal Germplasm Conservation, Universidade Federal Rural do Semi-Árido (Federal Rural University of the Semiarid Region) - UFERSA, Mossoró, RN, Brazil
| | - William M Machado
- Laboratory of Animal Reproduction, Universidade Estadual de Santa Cruz (State University of Santa Cruz) - UESC, Ilhéus, BA, Brazil
| | - Mateus M Santos
- Laboratory of Animal Germplasm Conservation, Universidade Federal Rural do Semi-Árido (Federal Rural University of the Semiarid Region) - UFERSA, Mossoró, RN, Brazil
| | - João B F Souza-Junior
- Laboratory of Animal Germplasm Conservation, Universidade Federal Rural do Semi-Árido (Federal Rural University of the Semiarid Region) - UFERSA, Mossoró, RN, Brazil
| | - Soraia V Matarazzo
- Laboratory of Animal Reproduction, Universidade Estadual de Santa Cruz (State University of Santa Cruz) - UESC, Ilhéus, BA, Brazil
| | - Sérgio L G Nogueira-Filho
- Laboratory of Animal Reproduction, Universidade Estadual de Santa Cruz (State University of Santa Cruz) - UESC, Ilhéus, BA, Brazil
| | - Paola P das N Snoeck
- Laboratory of Animal Reproduction, Universidade Estadual de Santa Cruz (State University of Santa Cruz) - UESC, Ilhéus, BA, Brazil
| | - Alexandre R Silva
- Laboratory of Animal Germplasm Conservation, Universidade Federal Rural do Semi-Árido (Federal Rural University of the Semiarid Region) - UFERSA, Mossoró, RN, Brazil.
| |
Collapse
|
2
|
Bordin RO, Dos Santos Fernandes CE, Franco-Belussi L, Ribeiro Farias Leão T, Sanabria M. Sperm morphology and testicular histology of the polyandric species Leptodactylus podicipinus (Anura: Leptodactylidae) from an urban environment. Anat Rec (Hoboken) 2022; 305:3532-3542. [PMID: 35365960 DOI: 10.1002/ar.24928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 03/15/2022] [Accepted: 03/15/2022] [Indexed: 11/11/2022]
Abstract
Anurans have a high reproductive diversity, which is closely associated with testicular dynamics and sperm production. This variety in reproduction is modulated by the sexual characteristics of reproductive strategies, such as polyandry. Leptodactylus podicipinus has high reproductive plasticity, wide geographical distribution, and polyandric behavior. Although aspects of the testes and sperm of this species are known, knowledge about the relationship between these aspects and reproductive investment is scarce. The present study evaluated the morphological characteristics of the testes and sperm in an urban environment. We used 11 sexually mature males from the city of Campo Grande, Mato Grosso do Sul, Brazil. The specimens were obtained from night excursions between April and September; the months that constitute the post-rainy season. The biometric data (snout-vent length, testes, and body mass) were associated with sperm parameters (length of the spermatozoon head and tail). Stereological analyses of sperm morphology and the testes were performed. The results showed correlations between testis mass and spermatozoon length, which were positively related to head length and negatively related to tail length. The locular area and tail length were also negatively correlated. The percentage of normal spermatozoa was 97%; however, some sperm heads and tails exhibited different morphologies from the pattern described for the species. The germinative structure comprised more than 50% of the locular area composed of spermatozoa. The results of this study contribute to the knowledge of aspects related to the reproductive biology of L. podicipinus obtained from an urban environment.
Collapse
Affiliation(s)
- Rafael Oliveira Bordin
- Programa de pós graduação em Biologia Animal, Universidade Federal de Mato Grosso do Sul, 79070-900, Campo Grande, MS, Brasil
| | - Carlos Eurico Dos Santos Fernandes
- Laboratório de Patologia Experimental (LAPEx), Instituto de Biociências, Universidade Federal de Mato Grosso do Sul, Campo Grande, Brasil
| | - Lilian Franco-Belussi
- Laboratório de Patologia Experimental (LAPEx), Instituto de Biociências, Universidade Federal de Mato Grosso do Sul, Campo Grande, Brasil
| | - Taynara Ribeiro Farias Leão
- Programa de pós graduação em Biodiversidade, Universidade Estadual Paulista, São José do Rio Preto, SP, Brasil
| | - Marciana Sanabria
- Instituto de Biociências, Universidade Federal de Mato Grosso do Sul, 79070-900, Campo Grande, Brasil
| |
Collapse
|
3
|
Centeno FC, Vivancos A, Andrade DV. Reproductive Biology and Sexual Dimorphism in Bokermannohyla alvarengai (Anura: Hylidae). HERPETOLOGICA 2021. [DOI: 10.1655/herpetologica-d-19-00070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Fernanda C. Centeno
- Departamento de Zoologia, Instituto de Biociências, Universidade Estadual Paulista (UNESP), CEP 13506-900, Rio Claro, Brazil
| | - Aurélien Vivancos
- Unidad de Sistemas Acuáticos, Centro de Ciencias Ambientales EULA, Universidad de Concepción, Concepción, Chile
| | - Denis V. Andrade
- Departamento de Zoologia, Instituto de Biociências, Universidade Estadual Paulista (UNESP), CEP 13506-900, Rio Claro, Brazil
| |
Collapse
|
4
|
Maia KM, Souza ALP, Silva AM, Souza-Jr JBF, Costa LLM, Brandão FZ, Oliveira MF, Comizzoli P, Silva AR. Environmental effects on collared peccaries (Pecari tajacu) serum testosterone, testicular morphology, and semen quality in the Caatinga biome. Theriogenology 2018; 126:286-294. [PMID: 30597387 DOI: 10.1016/j.theriogenology.2018.12.032] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Revised: 12/14/2018] [Accepted: 12/20/2018] [Indexed: 12/30/2022]
Abstract
The objective of the study was to understand the influence of climatic variations in a semiarid environment on serum testosterone, testicular morphology and semen quality in collared peccaries (Pecari tajacu). Reproductive metrics (semen quality, testicular morphometry and testosterone serum profiles) of 10 mature males were measured monthly for 18 months. Meteorological data (rainfall, air temperature, relative humidity, wind speed and radiant heat load) also were recorded during the same period. Rainfall regimes were classified in different classes (Class 1: months with no rain; Class 2: months with up to 50 mm of rain; and Class 3: months with >50 mm of rain). Among rainfall classes, average air temperature (°C) and relative humidity (%) were different. Climatic changes between rainfall classes did not lead to overall variations of testicular size, testosterone production, and semen metrics. However, relative humidity recorded before semen collection (one day, one week, or over 51-55 days) was positively correlated (P < 0.05) with semen motility metrics (total motility, beat cross frequency and straightness) and sperm subpopulations (medium and static sperm), as well as with volume. Negative correlations (P < 0.05) were revealed between air temperature and the same semen motility patterns and volume. Additionally, radiant head load measured on the day of semen collection negatively influenced (P < 0.05) sperm straightness. This study demonstrates for the first time that no seasonal changes could be detected overt the 18-month period on the serum testosterone, testicular morphology and semen quality of collared peccaries raised in the Caatinga biome; however, it is expected that long term environmental changes will influence the reproductive physiology of species leaving in that habitat.
Collapse
Affiliation(s)
- K M Maia
- Laboratory of Animal Germplasm Conservation (LCGA), Departamento de Ciências Animais, Universidade Federal Rural do Semi-Árido (UFERSA), BR 110, Km 47, Costa e Silva, CEP: 59625-900, Mossoró, Brazil
| | - A L P Souza
- Programa de Pós-Graduação em Biotecnologia, Universidade Federal do Ceará, Sobral, Brazil
| | - A M Silva
- Laboratory of Animal Germplasm Conservation (LCGA), Departamento de Ciências Animais, Universidade Federal Rural do Semi-Árido (UFERSA), BR 110, Km 47, Costa e Silva, CEP: 59625-900, Mossoró, Brazil
| | - J B F Souza-Jr
- Laboratório de Biometeorologia, Biofísica Ambiental e Bem-Estar Animal (LABBEA), Departamento de Ciências Animais, Universidade Federal Rural do Semi-Árido (UFERSA), Mossoró, RN, Brazil
| | - L L M Costa
- Laboratório de Biometeorologia, Biofísica Ambiental e Bem-Estar Animal (LABBEA), Departamento de Ciências Animais, Universidade Federal Rural do Semi-Árido (UFERSA), Mossoró, RN, Brazil
| | - F Z Brandão
- Departamento de Patologia e Clínica Veterinária, Faculdade de Veterinária, Universidade Federal Fluminense (UFF), Rua Vital Brasil Filho, 64, 24320-340, Niteroi, RJ, Brazil
| | - M F Oliveira
- Laboratory of Animal Germplasm Conservation (LCGA), Departamento de Ciências Animais, Universidade Federal Rural do Semi-Árido (UFERSA), BR 110, Km 47, Costa e Silva, CEP: 59625-900, Mossoró, Brazil
| | - P Comizzoli
- Smithsonian Conservation Biology Institute, National Zoological Park, P.O. Box 37012, MRC 5502, Washington, DC, 20008, USA
| | - A R Silva
- Laboratory of Animal Germplasm Conservation (LCGA), Departamento de Ciências Animais, Universidade Federal Rural do Semi-Árido (UFERSA), BR 110, Km 47, Costa e Silva, CEP: 59625-900, Mossoró, Brazil.
| |
Collapse
|