Gonad morphology at the gross anatomical or histological levels has long been studied by
fisheries biologists to identify annual reproductive cycles and length of breeding season …

Fish Histology: From Cells to Organs, 2nd Edition provides up-to-date information that
emphasizes the relationships and concepts by which cell and tissue structures of fish are …

This study aimed to examine the ultrastructure of spermatogenic stages and mature
spermatozoa in the European grayling, Thymallus thymallus. The testes were examined …

We studied the relationship between the morphology of the reproductive system and the
reproductive strategies of six neotropical catfishes using macroscopic and microscopic …

The gonad morphology and gametogenesis of Lophiosilurus alexandri Steindachner, 1877
from Santo Antônio river (Minas Gerais, Brazil) were studied through anatomical and …

The reproduction of Iheringichthys labrosus (Lütken, 1874) from the Turvo River, Brazil, was
studied using anatomical, biometric, histological, and ultrastructural techniques. Between …

During the fish reproductive cycle, testes undergo morphological changes related to
germinal epithelium and remodeling of extracellular matrix components (ECM). ECM is …

To investigate the relationship between fertilization modalities and the morphology of male
reproductive apparatus, two species of Auchenipteridae, Auchenipterus nuchalis and Tatia …

The histological description of the urogenital papilla is an important tool to comprehension of
the reproductive mechanisms in fish, as well as a pre-requisite to germ cell transplantation in …

In this work we describe the gonad morphology and spawning season of Hypostomus affinis
(Steindachner, 1877) in a tropical reservoir based on 55 males and 125 females. Our aim …