Results 121 to 130 of about 299,505 (285)

The revision of baphetids from the Middle Pennsylvanian of the Czech Republic: Morphology, ontogeny, palaeoecology, and the reassessment of the phylogeny of Baphetoidea

open access: yesThe Anatomical Record, EarlyView.
Abstract The baphetoids represent a clade of the Carboniferous stem‐tetrapods (Middle Mississippian—Middle Pennsylvanian) with a characteristic extension of the orbits into antorbital vacuities, which formed keyhole‐shaped openings on the skull. The more derived baphetids were crocodile‐like piscivores frequently occurring in coal‐bearing lacustrine ...
Pavel Barták, Martin Ivanov, Boris Ekrt
wiley   +1 more source

Desarrollo larval de Palaemonetes mexicanus y P. hobbsi (Caridea: Palaemonidae) cultivadas en el laboratorio Larval development of Palaemonetes mexicanus and P. hobbsi (Caridea: Palaemonidae) reared in the laboratory

open access: yesRevista Mexicana de Biodiversidad, 2010
Los langostinos del género Palaemonetes ocupan una amplia variedad de hábitats, desde condiciones marinas hasta agua dulce. El desarrollo larval de las especies marinas o salobres es prolongado, mientras que el de las especies de agua dulce es breve.
Gabino A. Rodríguez-Almaráz   +2 more
doaj  

Analysis of Elimination Effects of Inbreeding on Genotype Frequency in Larval Stages of Chinese Shrimp

open access: yesBiology
Marine animals possess genomes of considerable complexity and heterozygosity. Their unique reproductive system, characterized by high fecundity and substantial early mortality rates, increases the risk of inbreeding, potentially leading to severe ...
Qiang Fu   +8 more
doaj   +1 more source

The Kateretidae and Nitidulidae of the Maltese Archipelago (Coleoptera) [PDF]

open access: yes, 2008
In the present work, a total of 3 Kateretidae and 26 Nitidulidae are recorded from the Maltese Islands. Of these, 14 Nitidulidae (Epuraea luteola, Epuraea ocularis, Carpophilus bifenestratus, Carpophilus marginellus, Carpophilus quadrisignatus ...
Audisio, Paolo, Mifsud, David
core  

The tiger salamander as a promising alternative model organism to the axolotl for fracture healing and regenerative biology research

open access: yesThe Anatomical Record, EarlyView.
Abstract Scientists have been captivated by the ability to regenerate, focusing on uncovering the mechanisms of epimorphic regeneration and applying them to human medicine. The axolotl (Ambystoma mexicanum) has become the most intensively studied model in tetrapod regeneration research, particularly concerning limb regeneration.
Vivien Bothe, Nadia Fröbisch
wiley   +1 more source

Dietary Shifts Among the Developmental Stages of the Ectoparasite, Argulus japonicus (Crustacea; Branchiura), Mirror Ontogeny as Shown Through Differences in Stable Isotope Ratios of Carbon (δ13C) and Nitrogen (δ15N)

open access: yesEcology and Evolution
Food web architecture and trophic interactions between organisms can be studied using ratios of naturally occurring stable isotopes of carbon (13C/12C) and nitrogen (15N/14N).
Beric M. Gilbert   +3 more
doaj   +1 more source

Indonesian inquiry: A narrative of biocultural teaching on Sulawesi Utara

open access: yesBritish Educational Research Journal, EarlyView.
Abstract Using phenomenology, narrative inquiry and autoethnographic approaches, this study analyses a program of faculty development conducted alongside the delivery of an international field school. Through this study, we explore the value and benefits of inter‐cultural field programming and how these might serve to complement or to redress ...
David Zandvliet, Wiske Rotinsulu
wiley   +1 more source

Why we age

open access: yesBiological Reviews, EarlyView.
ABSTRACT Three categories of explanations exist for why we age: mechanistic theories, which omit reference to evolutionary forces; weakening force of selection theories, which posit that barriers exist that prevent evolutionary forces from optimising fitness in ageing; and optimisation theories, which posit that evolutionary forces actually select for ...
Michael S. Ringel
wiley   +1 more source

Mapping molluscan endocrinology: a systematic and critical appraisal

open access: yesBiological Reviews, EarlyView.
ABSTRACT Historically, a vertebrate‐centric paradigm has framed our interpretation of molluscan endocrinology, with considerable research focusing on vertebrate‐type steroid hormones (e.g. oestrogens, testosterone). However, contradictory evidence on the occurrence of vertebrate‐type steroid hormones in molluscan tissues, and a lack of the specific ...
Konstantinos Panagiotidis   +3 more
wiley   +1 more source

Efeito de vitaminas e esterol como aditivos foliares no desenvolvimento de Bombyx mori L. e influência do modo de aplicação

open access: yesArquivos do Instituto Biológico
O objetivo deste estudo foi avaliar os efeitos e os métodos de aplicação dos aditivos foliares decanoato de nandrolona (esteroide anabolizante) a 0,5%, ácido ascórbico (vitamina C) a 0,5%, palmitato de retinol (vitamina A) a 0,5% e acetato de retinol ...
Sergio Antonio De Bortoli   +4 more
doaj   +1 more source

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