Results 61 to 70 of about 80,118 (189)

Seasonal and Sexual Variations in Corticosterone and Total Triiodothyronine: A Pilot Study in Mediterranean Tortoises (Testudo hermanni)

open access: yesAnimals
The Mediterranean tortoise Testudo hermanni inhabits different regions bordering the northwestern Mediterranean. This species is vulnerable, protected by legislation, and involved in various breeding and reintroduction programs.
Sergi Olvera-Maneu   +5 more
doaj   +1 more source

Regulatory Mechanisms of Cell Polyploidy in Insects

open access: yesFrontiers in Cell and Developmental Biology, 2020
Polyploidy cells undergo the endocycle to generate DNA amplification without cell division and have important biological functions in growth, development, reproduction, immune response, nutrient support, and conferring resistance to DNA damage in animals.
Dani Ren   +9 more
doaj   +1 more source

The Effect of Methyl Farnesoate Hormone on Reproduction in Crustaceans

open access: yesYüzüncü Yıl Üniversitesi Tarim Bilimleri Dergisi, 2021
Artificial production of crustaceans has gained importance on a global scale with the increase in demand. For this reason, studies are carried out to increase reproductive efficiency with hormone applications in aquaculture studies of economically ...
Mehmet BAL, Ayşe Gül HARLIOĞLU
doaj   +1 more source

Juvenile hormone resistance: ¡ no PASaran ! [PDF]

open access: yesProceedings 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

Regulation of the juvenile hormone titre in the Colorado potato beetle [PDF]

open access: yes, 1978
Three main topics were investigated in regulation of the titre of juvenile hormone in haemolymph of the Colorado potato beetle ( Leptinotarsa decemlineata Say): enzymic breakdown of the hormone; binding and protection of the hormone by carrier proteins ...
Kramer, S.J.
core   +1 more source

A case of intersex occurrence in Steindachneridion parahybae (Steindachner, 1877) (Siluriformes: Pimelodidae) under captivity condition: A cytogenetic and morphological study [PDF]

open access: yes, 2016
Poco se sabe sobre la biología reproductiva de Steindachneridion parahybae , una especie de teleósteo gonocorístico en peligro de extinción que habita la cuenca del río Paraíba do Sul y en éste trabajo se describe por primera vez la aparición de ...
Caneppele, Danilo   +4 more
core   +2 more sources

Mikroanalytische Bestimmung von Juvenilhormonen

open access: yesCHIMIA, 1985
Different techniques like bioassay, radioimmuno assay, and gas chromatography combined mass spectrometry are in use for a quantitative estimation ofjuvenile hormones in biological samples.
Heinz Rembold
doaj   +1 more source

Optimizing rearing and welfare in Senegalese sole (Solea senegalesensis) broodstock: effect of ambient light intensity and handling time on stress response [PDF]

open access: yes, 2019
Broodstock rearing conditions and handling procedures should be optimized in aquaculture species in order to benefit fish welfare and guarantee optimal conditions for spawning. In teleosts, basal cortisol levels display daily rhythms, oscillating along
Aragão, Cláudia   +4 more
core   +2 more sources

Epidemiology and fitness effects of wood mouse herpesvirus in a natural host population [PDF]

open access: yes, 2012
Rodent gammaherpesviruses have become important models for understanding human herpesvirus diseases. In particular, interactions between murid herpesvirus 4 and Mus musculus (a non-natural host species) have been extensively studied under controlled ...
Amy B. Pedersen   +12 more
core   +1 more source

Partial baldness in relation to reproduction in pond bats in the Netherlands [PDF]

open access: yes, 2009
Meervleermuizen (Myotis dasycneme) vertonen vaak opvallende kale plekken op de rug. Aan de hand van data van meer dan 2200 gevangen meervleermuizen tussen 2003 en 2008 hebben we de mogelijke sociale, eologische en fysiologische oorzaken achter dit ...
Alphen, J., van, Haarsma, A.J.
core   +1 more source

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