Consulta: subjectFacets:"Larvae morphometry"
Registros recuperados: 2
Data/hora: 01/06/2024 12:28:34

The use of morphological and histological features as nutritional condition indices of Pagrus pagrus larvae
Provedor de dados: 83
Autores: Diaz,Marina Vera; Arano,María Felisa; Pájaro,Marcelo; Aristizábal,Eddie Oscar; Macchi,Gustavo Javier.
Morphometrical and histological techniques were employed to characterize Pagrus pagrus larvae nutritional condition. Larvae were reared in laboratory under controlled conditions with the main objective of testing whether these methodologies allowed finding differences between larvae from different feeding treatments. Once yolk was consumed (three days after hatching) larvae were assigned to a feeding treatment: starved during the whole experiment; delayed feeding, starved during three days; fed during the entire experiment. Algae (Nannochloropsis oculata) and rotifers (Brachionus plicatilis) were provided to larvae for feed treatments. Larvae were fixed daily; for morphometrical purposes in 5% formaldehyde solution, and in Bouin for histological sections....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Critical period; Larvae histology; Larvae morphometry; Red porgy; Starvation.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000300649

Early ontogenesis of the angelfish, Pterophyllum scalare Schultze, 1823 (Cichlidae)
Provedor de dados: 83
Autores: Korzelecka-Orkisz,Agata; Szalast,Zuzanna; Pawlos,Dorota; Smaruj,Izabella; Tañski,Adam; Szulc,Joanna; Formicki,Krzysztof.
This study describes the egg membrane structures of angelfish (Pterophyllum scalare), morpho-physiological changes during angelfish embryogenesis from activation to hatching under optimal conditions (28°C; pH 6.8), the developing larvae and fry, the effect of alkaline pH on the early developmental stages of the species, the relationship between food item size and fry survival. Egg membranes (thin, transparent, 1.67-2.18 µm thick) are covered by a sticky substance. The amber-coloured angelfish eggs were oval in shape, with average diameters of 1.436 and 1.171 mm, i.e., a mean volume of 1.033 ± 0.095 mm³. The survival rate of embryos and larvae kept in water with an elevated, slightly alkaline pH was very low: as few as 2% of the embryos survived, while in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Egg; Embryogenesis; Embryonic motorics; Larvae morphometry; Membrane structures.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252012000300010