Data/hora: 01/06/2024 02:30:00

Provedor de dados: | Neotropical Ichthyology
País: | Brazil
Título: | Age-associated hemogram and ultrastructural leukocyte morphology in Pygocentrus nattereri (Characiformes: Serrasalmidae) from the Brazilian Pantanal
Autores: | Siqueira,Mayara S.; Leão,Taynara R. F.; Rodrigues,Robson A.; Farias,Karine N. N.; Silva,André L. N.; Marcondes,Sandriely F.; Veiga,Marcelo L.; Franco-Belussi,Lilian; Fernandes,Carlos E.
Data: | 2021-01-01
Ano: | 2021
Palavras-chave: | Fish; Hematology; Leukocyte ultrastructural morphology; Standard length.
Resumo: | ABSTRACT Pygocentrus nattereri is a carnivorous fish widely distributed in the Brazilian wetland and occupies different river strata. Based on the sexual maturity, the standard length (SL) has been used to categorize age and physiological attributes. However, hematological parameters and their relationship with age and growth features are unknow. Here, the aim was to evaluate the hematological profile and leukocyte data of juvenile and adult specimens, associating it with SL. Specimens of both sexes were weighted, and SL were measured for classify as juveniles (SL ≤16.0 cm) and adults (SL ≥16.1 cm). Blood was collected to perform the hemogram, for leukocyte quantification and ultrastructural descriptions. In general, hemogram values and leukocyte, lymphocyte, and monocyte counts were high in juveniles. Hemogram variables were negatively correlated with SL. Thrombocyte and neutrophil counts were higher in adults than in juveniles. SL was correlated with leukogram variables. Ultrastructural analysis showed that granular leukocyte count in P. nattereri was similar another fishes. PAS-positive granular leukocytes are slightly smaller than neutrophils and are characterized by dense elongated and semi-lunar shapes in the cytoplasm. Our results suggest that age-based SL may be useful for the analysis of the relationship between P. nattereri health status and wetland aquatic environments.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252021000100216
Editor: | Sociedade Brasileira de Ictiologia
Relação: | 10.1590/1982-0224-2020-0136
Formato: | text/html
Fonte: | Neotropical Ichthyology  v.19 n.1 2021
Fonte: | info:eu-repo/semantics/openAccess