Results 61 to 70 of about 4,193 (178)

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

Histological characterisation of gonadal sex differentiation in Malabar red snapper (Lutjanus malabaricus) for aquaculture advancement

Journal of Fish Biology, Volume 109, Issue 1, Page 246-256, July 2026.
Abstract The Malabar red snapper (Lutjanus malabaricus) is a high‐value tropical marine species receiving growing attention for aquaculture development in Singapore and Southeast Asia. At present, seed production relies primarily on uncontrolled mass spawning in sea cages, a practice that lacks consistency, biosecurity and control of genetic ...
Bing Liang, Dean R. Jerry, Joyce Koh, Purushothaman Kathiresan, Celestine Terence, Xueyan Shen, Grace Loo, Shubha Vij, Jose A. Domingos   +8 more
wiley   +1 more source

Gonadal Histology and Spawning Season of Otolithoides pama in the Thanlwin River Estuary

Aquaculture, Fish and Fisheries, Volume 6, Issue 3, June 2026.
ABSTRACT The spawning season of Otolithoides pama in the Thanlwin estuary was estimated through gonadosomatic index (GSI) and histological analyses of gonadal development. A total of 290 specimens (240 females and 50 males) were collected monthly from 5 sites—Ahlat, Kyauk Tan, Daye, Nyaung Pin Seik and Tarana—between January and December 2024.
Thet Htwe Aung
wiley   +1 more source

Revisiting Maturity Data: Using Oocyte Diameter and Gonadosomatic Index to Retroactively Apply a New Maturity Scale to Greenland Halibut (Reinhardtius hippoglossoides)

Fisheries Management and Ecology, Volume 33, Issue 3, Page 601-611, June 2026.
ABSTRACT Greenland halibut (Reinhardtius hippoglossoides) is a deep‐water flatfish which lives at temperatures of 1°C–4°C and produces large eggs (> 3 mm). The combination of low temperatures and large eggs has resulted in an unusual ovary development cycle, with vitellogenesis taking more than 1 year.
James Kennedy, Ásgeir Gunnarsson, Svanhildur Egilsdóttir, Bjarki Þór Elvarsson   +3 more
wiley   +1 more source

Histological Characterization and Oocyte Development in Pearlspot, Etroplus suratensis (Bloch, 1790) From Vembanad Lake, Kerala, India

Aquaculture, Fish and Fisheries
This study is the first to elucidate the oocyte growth pattern of Etroplus suratensis through detailed gonad histology. Ovary samples from different maturity stages were collected from October 2023 to September 2024 from cage culture systems installed in
Mohammad Saddam Hussain, Mahadevan Harikrishnan, Dinesh Yadav, Betsee Thomas, Keerthana PV, Nikhila Khanna AR, Haritha Haridas, Mohamad Husneid Azad, Akhil Soman   +8 more
doaj   +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

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  

The cell biology of mosquito vitellogenesis

Memórias do Instituto Oswaldo Cruz, 1987
Insect vitellogenesis involves coordinated activities of the fat body and oocytes. We have studied these activities at the cellular level in the mosquito. During each vitellogenic cycle, the fat body undergoes three successive stages: 1) proliferation of biosynthetic organelles, 2) vitellogenin synthesis, 3) termination of vitellogenin synthesis and ...
openaire   +4 more sources

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

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