Results 51 to 60 of about 430,506 (249)
The Anatomical Record, EarlyView.Abstract The claspers are the copulatory organs in male elasmobranchs, responsible for directing the semen into the female cloaca (C). However, the microscopic morphology of the claspers remains poorly understood. This study describes the morphology of the claspers and clasper glands (CGs) of cururu stingray (Potamotrygon wallacei) at different ...
Matheus Samuel Cunha Braga +4 more
wiley +1 more source
Adaptive host responses to infection can resemble parasitic manipulation
Ecology and Evolution, 2023 Using a dynamic optimisation model for juvenile fish in stochastic food environments, we investigate optimal hormonal regulation, energy allocation and foraging behaviour of a growing host infected by a parasite that only incurs an energetic cost.
Camilla Håkonsrud Jensen +5 more
doaj +1 more source
Juvenile hormone resistance: ¡ no PASaran ! [PDF]
Proceedings of the National Academy of Sciences, 1998 The control of growth, differentiation, metamorphosis, and reproduction in insects is a complex interplay of hormones, with the steroid hormone ecdysone and the sesquiterpenoid juvenile hormone (JH) playing major roles. Molting is controlled by ecdysone, and the type of molt is controlled by JH.
openaire +2 more sources
Postnatal craniomandibular growth in Harbor seals (Phoca vitulina vitulina)
The Anatomical Record, EarlyView.Postnatal ontogeny in Harbor seals (Phoca vitulina vitulina). Cranium and mandible grow rapidly until 5 years of age, followed by a deceleration and finally a stagnation. Abstract As secondarily aquatic carnivores, seals display several phenotypic differences compared to their terrestrial relatives.
Elisabeth Steinbach +2 more
wiley +1 more source
Effects of Methyl Farnesoate on the Growth and Antioxidant Capacity of Neocaridina denticulata
AntioxidantsSesquiterpenoid hormones are widely present in arthropods and play crucial roles in growth, molting and reproduction. Methyl farnesoate (MF) functions similarly to juvenile hormone (JH) in crustaceans, playing a broad regulatory role in their growth and ...
Ying Chen +5 more
doaj +1 more source
Exceptional preservation informs the paleobiology of tapinocephalid dinocephalians
The Anatomical Record, EarlyView.Abstract The tapinocephalid dinocephalian Moschops is one of the most iconic taxa of the middle Permian, yet its paleobiology remains one of the least well‐known. Here, we address some aspects of paleoneurology and paleobiology of Moschops using CT scanning of four well preserved skulls from the upper Abrahamskraal Formation of South Africa. Two of the
Julien Benoit +6 more
wiley +1 more source
Neural PlasticityCardiac arrest (CA)-induced global cerebral ischemia (GCI) in childhood often results in learning and memory deficits. We previously demonstrated in a murine CA and cardiopulmonary resuscitation (CA/CPR) mouse model that a cellular mechanism of learning ...
Jose J. Vigil +10 more
doaj +1 more source
Characterization of the juvenile hormone pathway in the viviparous cockroach, Diploptera punctata.
PLoS ONE, 2015 Juvenile hormones (JHs) are key regulators of insect development and reproduction. The JH biosynthetic pathway is known to involve 13 discrete enzymatic steps.
Juan Huang +3 more
doaj +1 more source
The Anatomical Record, EarlyView.Abstract The obstetrical dilemma hypothesis (ODH) proposes an evolutionary trade‐off between obstetric requirements and locomotor performance. However, whether external pelvic breadth measures influence walking energetics during human growth remains poorly understood.
Guillermo Zorrilla‐Revilla +4 more
wiley +1 more source
Journal of Apicultural Science, 2019 An increasingly amount of evidence supports that the evolution of eusociality is accompanies by shifts in ancient molecular and physiological pathways. The juvenile hormone, one of the most important hormones in the post-embryonic development of insects,
Yang Huipeng, Wu Jie
doaj +1 more source