Results 61 to 70 of about 4,036 (162)

Histology of the oocytes of Lutjanus peru (Nichols and Murphy, 1922) (Pisces: Lutjanidae)

Ciencias Marinas, 2001
The distinctive characteristics found in each of the development stages of the oocyte in the ovary of Lutjanus peru (Pacific red snapper) are described.
G Lucano-Ramírez, M Villagrán-SantaCruz, S Ruiz-Ramírez, T López-Murillo   +3 more
doaj   +1 more source

An RNA interference biopesticide reduces reproduction of the honey bee parasite Varroa destructor by down‐regulating embryo development pathways

Pest Management Science, Volume 82, Issue 3, Page 2694-2707, March 2026.
Varroa destructor mites exposed to dsRNA specific in sequence to a V. destructor calmodulin gene significantly effected gene expression of adult female mites sampled 5 days after entering a honey bee brood cell to reproduce. Significantly down‐regulated genes included Calmodulin and were associated with calcium ion binding and embryo developmental ...
Zoe E Smeele, Rose A McGruddy, James W Baty, Brian Manley, Kenneth Narva, Emma De Neef, Eric RL Gordon, Upendra K Devisetty, Katie Youngs, Antoine Felden, Philip J Lester   +10 more
wiley   +1 more source

Gonadulin and Insulin‐Like Growth Factor Involved in Rhipicephalus microplus Reproduction

Entomologia Experimentalis et Applicata, Volume 174, Issue 3, Page 285-295, March 2026.
Insulin‐like growth factor (IGF2) in ovaries of Rhipicephalus microplus partially engorged females. Ovaries from females at different feeding stages were used to detect IGF2. ABSTRACT Gonadulin and insulin‐like growth factor (IGF) are neuropeptides synthesized by the central nervous system (CNS) of arthropods.
Jéssica Waldman, Lucas Teixeira de Castro, Vinícius Andrade‐Silva, Jéssica Andrade Paes, Luís Fernando Parizi, Maria Aparecida Juliano, Saulo Petinatti Pavarini, David Driemeier, Itabajara da Silva Vaz Jr.   +8 more
wiley   +1 more source

Molecular and Endocrine Regulation of Ovarian Maturation in the Black Tiger Prawn (Penaeus monodon) and Associated Challenges in Its Aquaculture

Reviews in Aquaculture, Volume 18, Issue 2, March 2026.
ABSTRACT Over the past four decades, substantial research has investigated the regulation of ovarian maturation and spawning in the black tiger prawn (Penaeus monodon). In this species, female reproduction is strongly suppressed by gonad‐inhibiting hormone (GIH) released from the eyestalk, making eyestalk ablation (ESA) the most widely adopted spawning‐
Gourab Chowdhury, Josephine Nocillado, Abigail Elizur, Scott F. Cummins, Tomer Ventura   +4 more
wiley   +1 more source

Assessment of Vitellogenin Synthesis in Salvator merianae as a Biomarker of Exposure to Xenoestrogens in Terrestrial Ecosystems

Acta Zoológica Lilloana
The expansion of agriculture and livestock in Argentina has significantly increased the use of pesticides, adversely impacting animal and human health.
Olga Luz Sánchez Loria, María Valeria García-Valdez, Marcela Beatriz Hernández   +2 more
doaj   +1 more source

Geographic Divergence and the Genomic Basis of Reproductive Diapause in Drosophila triauraria

Molecular Ecology, Volume 35, Issue 3, February 2026.
ABSTRACT Adjusting reproduction timing to environmental cues is essential for lifetime fitness. In many insects, reproductive diapause shows clinal variation along environmental gradients such as photoperiod and temperature. How such continuous trait variation may be encoded at the molecular level and maintained in the presence of gene flow remains ...
Takako Fujichika, Yuki Aoyama, Moe Onuma, Masafumi Nozawa, Aya Takahashi   +4 more
wiley   +1 more source

Decreased survival of mosquito cells after stable transfection with a Drosophila ecdysteroid response element: Possible involvement of a 40 kDa DNA binding protein

Journal of Insect Science, 2002
Homologous transfection systems provide a useful tool for characterizing promoters and other regulatory elements from cloned genes. We have used cultured Aedes albopictus C7-10 mosquito cells to evaluate expression of 20-hydroxyecdysone-inducible genes ...
Gitanjali Jayachandran, Ann M. Fallon
doaj  

Ultrastructural studies of oogenesis in Bolinus brandaris (Gastropoda: Muricidae)

Scientia Marina, 2004
Ultrastructural studies of oogenesis in Bolinus brandaris are described. Although the initial phase of oogenesis is common to most animal species, vitellogenesis can be considered a species-specific characteristic.
María José Amor, Monserrat Ramón, Mercé Durfort   +2 more
doaj   +1 more source

Krüppel Homolog 1 Is Required for the Role of Methyl Farnesoate in Vitellogenesis in the Mud Crab Scylla paramamosain

Fishes
Methyl farnesoate (MF), a counterpart of insect juvenile hormones in crustaceans, plays essential roles in molting, metamorphosis, and reproduction. In this paper, we isolated a gene-encoding Krüppel homolog 1 from the mud crab Scylla paramamosain (Sp-Kr-
Yongqi Lai, Li Lu, Shaoming Gong, Fang Liu, Haihui Ye   +4 more
doaj   +1 more source