3 documents found, page 1 of 1
Reproductive traits of the European catfish, Silurus glanis, during the early s...
Gkenas, C.; Sequeira, V.; Ribeiro, D.; Gago, João; Dias, D.; Verma, C.R.; Kumkar, P.; Ribeiro, F.In recent decades, the European catfish Silurus glanis has spread across Europe and elsewhere, significantly impacting the native fauna of the recipient ecosystems. Studies on its reproductive traits from its non-native range are limited, although this is a critical step in developing effective management plans. Here, we explore the reproductive characteristics of invasive European catfish populations in the Lo...
Negative impact on the reproductive potential of blue jack mackerel Trachurus p...
Neves, A.; Gordo, I.; Sequeira, V.; Vieira, A.R.; Silva, E.; Silva, F.; Duarte, A.M.; Mendes, S.; Ganhão, R.; Peleteiro, M.C.; Assis, C.; Rebelo, R.Reproduction of Trachurus picturatus off the western Portuguese coast was studied over 1 yr. During histological analyses, the presence of Kudoa sp. was detected in advanced vitellogenic oocytes. Kudoa infections are known to cause economic loss through the induction of postmortem liquefaction of fish muscles, but ovarian infection as reported in this study will seriously affect the reproductive potential of th...
Zygoparity and sex steroid hormone profiles in bluemouth Helicolenus dactylopterus
Sequeira, V.; Couto, Elsa; Neves, A.; Vieira, A. R.; Paiva, R. B.; Canario, A.V.M.; Gordo, L. S.Two hundred and seven individuals (103 females and 104 males) of bluemouth Helicolenus dactylopterus (Scorpaeniformes, Sebastidae), a commercially important deep-water species with an unusual reproductive strategy, from the eastern Atlantic Ocean ranging from 13<bold></bold>9 to 37<bold></bold>5 cm total length (L-T) were analysed from September 2011 to October 2012. The analysis included gonad maturity phases ...