Results 21 to 30 of about 33,233 (205)
Deciphering the morphological variation and its ontogenetic dynamics in the Late Devonian conodont Icriodus alternatus [PDF]
Identification of relevant taxonomic and evolutionary units is a recurrent issue in the fossil record, and all the more for ancient fossils devoid of modern equivalents such as conodonts. Extensive morphological variation has often led to the description
Catherine Girard +4 more
doaj +3 more sources
Early ontogeny of tetra Markiana nigripinnis (Characiformes: Characidae) [PDF]
The early development of Markiana nigripinnis is described by morphological characters, pigmentation, and morphometry. Larvae were obtained through semi-natural breeding, collected, fixed, and identified according to their development. Eighty individuals
Mateus Babichi Veiga de Souza +3 more
doaj +1 more source
Aquaculture of marine ornamental fish could potentially reduce the fishing pressure on wild stocks by the global aquarium trade, but its expansion is often constrained by the limited understanding on the biology and early life history of candidate ...
Jun Yu Chen +2 more
doaj +1 more source
The ontogeny of early language discrimination: Beyond rhythm
Infants can discriminate languages that belong to different rhythmic classes at birth. The ability to perform within-class discrimination emerges around the fifth month of life. The cues that infants use to discriminate between prosodically close languages remain elusive.
Zacharaki, Konstantina +1 more
openaire +3 more sources
Effects of praziquantel on common carp embryos and larvae
This study aimed to assess the toxicity of praziquantel (anthelmintic drug) in different developmental stages of common carp (Cyprinus carpio) based on mortality, early ontogeny, growth, oxidative stress, antioxidant enzymes, histology and behaviour ...
Josef Velisek +4 more
doaj +1 more source
Skeletal ontogeny of the caudal complex in Caspian kutum, Rutilus kutum (Kamensky, 1901) (Teleostei: Cyprinidae) during early development [PDF]
Study of skeletal ontogeny during early development is crucial in a successful larviculture. In this study, ontogeny of the caudal complex skeleton in Caspian kutum, Rutilus kutum, was studied from hatching up to 50-day post hatching (dph).
P Farhang, S Eagderi
doaj +1 more source
Early development and growth of sterlet (Acipenser ruthenus) in the Czech Republic
Growth rate of sterlet larvae and juveniles during 2008 and 2009 was studied under experimental and farming conditions in the Czech Republic. The embryos hatched when reaching a mean total length (TL) of 9.0 mm.
Juraj Rybnikár +3 more
doaj +1 more source
The ontogeny of memory persistence and specificity
Interest in the ontogeny of memory blossomed in the twentieth century following the initial observations that memories from infancy and early childhood are rapidly forgotten.
Adam I. Ramsaran +2 more
doaj +1 more source
The Early Ontogeny of Social Norms
Abstract Recent research has produced new insights into the early development of social cognition and social learning. Even very young children learn and understand social activities as governed by conventional norms that (a) are arbitrary and shared by the community, (b) have normative force and apply to all participants, and (c) are
Rakoczy, H. +1 more
openaire +3 more sources
In supportive breeding programs for wild salmon populations, stocked parr experience higher mortality rates than wild ones. Among other aspects of phenotype, the gut microbiota of artificially raised parr differs from that of wild parr before stocking ...
Camille Lavoie +4 more
doaj +1 more source

