Results 111 to 120 of about 31,775 (244)

Plasticity in the reproductive biology of Yellowstone cutthroat trout Oncorhynchus virginalis bouvieri in Yellowstone Lake following lake trout Salvelinus namaycush invasion

Journal of Fish Biology, EarlyView.
Abstract Yellowstone cutthroat trout Oncorhynchus virginalis bouvieri in Yellowstone Lake are the focus of intensive conservation efforts due to the threat of predation by invasive lake trout Salvelinus namaycush. Suppression gillnetting has reduced the abundance of predatory lake trout, and the Yellowstone cutthroat trout population is recovering ...
Michelle A. Briggs, Molly A. H. Webb, Christopher S. Guy, Todd M. Koel   +3 more
wiley   +1 more source

Reproductive behaviour of the ocean triggerfish Canthidermis sufflamen (Tetraodontiformes: Balistidae) in the shallow waters of the marine‐protected area of El Hierro Island (Canary Islands)

Journal of Fish Biology, EarlyView.
Abstract The abundance of Canthidermis sufflamen has increased worldwide, including around the Canary Islands, due to global ocean warming. The reproductive behaviour of this species was studied within a marine‐protected area (MPA) and its adjacent areas off the island of El Hierro (Canary Islands).
Alberto Rodríguez‐Díaz, Raül Triay‐Portella, José A. González, José G. Pajuelo   +3 more
wiley   +1 more source

Differential contribution of the MTOR and MNK pathways to the regulation of mRNA translation in meiotic and postmeiotic mouse male germ cells [PDF]

, 2010
Translation of stored mRNAs accounts for protein synthesis during the transcriptionally inactive stages of spermatogenesis. A key step in mRNA translation is the assembly of the initiation complex EIF4F, which is regulated by the MTOR (mammalian target ...
Adesso, L, Di Sauro, A, Geremia, R, Latina, A, Messina, V, Pedrotti, S, Rossi, P, Sette, C   +7 more
core   +1 more source

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

Journal of Fish Biology, EarlyView.
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

Timing feedback-inhibition of the male reproductive hormone axis [PDF]

, 2008
Hormonal methods of male contraception have addressed feedback-inhbition of the cascade of hormones that has evolved to regulate sperm production but high concentrations of testosterone (T) in the blood have not worked satisfactorily.
Amit Misra, Gopal Gupta, K Subramanian Venkatesh, Ritu R. Malik, Shailesh S. Tondwal   +4 more
core   +2 more sources

Radiographic Assessment of Bone Maturation: A Tool to Estimate Sexual Maturity in Common Dolphins (Delphinus delphis)?

Marine Mammal Science, Volume 42, Issue 3, July 2026.
ABSTRACT Accurate inference of sexual maturity is fundamental to interpreting marine mammal life histories and population structure. Using Bayesian logistic regression models with a hierarchical ordinal (HOF‐style) parameterisation and canonical analysis of principal coordinates (CAP), we evaluate skeletal metrics in the pectoral flippers of common ...
Eva‐Maria F. Hanninger, Ashley Barratclough, Emma L. Betty, Marti J. Anderson, Matthew R. Perrott, Joy Bowler, Emily I. Palmer, Katharina J. Peters, Karen A. Stockin   +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

Intracytoplasmic spermatid injection and in vitro maturation: fact or fiction?

Clinics
Intracytoplasmic injection with testicular spermatozoa has become a routine treatment in fertility clinics. Spermatozoa can be recovered in half of patients with nonobstructive azoospermia.
Veerle Vloeberghs, Greta Verheyen, Herman Tournaye   +2 more
doaj   +1 more source

Toxicity of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) in the developing male Wistar(Han) rat II: chronic dosing causes developmental delay [PDF]

, 2007
We have investigated whether fetal exposure to 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) causes defects in the male reproductive system of the rat, using chronically exposed rats to ensure continuous exposure of the fetus. 5-6 week old rats were exposed
Bell, David Robert, Clode, Sally, Fan, MingQi, Fernandes, Alwyn, Foster, Paul M D, Jiang, tao, Loizou, George, MacNicoll, Alan, Miller, Brian G, Rose, Martin, Tran, Lang, White, Shaun   +11 more
core   +1 more source

Male germ cell-specific protein Trs4 binds to multiple proteins [PDF]

, 2009
Temperature-related sequence 4 (Trs4) has been identified as a testis-specific gene with expression sensitive to the abdominal temperature changes induced by artificial cryptorchidism.
Guo, J, Han, CS, Hu, XQ, Hu, ZY, Huang, L, Lee, KF, Li, YC, Liao, SY, Liu, T, Liu, YX, Shi, YQ, Tang, AYB, Yeung, WSB   +12 more
core   +1 more source