Results 101 to 110 of about 44,854 (277)

A Meta‐Analysis on Environmental Triggers of Spawning Migrations Reveals a New Classification of Thermal Guilds in European Freshwater Fishes

Fish and Fisheries, EarlyView.
ABSTRACT Fish migration through river networks is essential for completing life cycles and accessing critical habitats, but fragmentation increasingly disrupts spawning movements. In Europe, over one million barriers limit connectivity and create trade‐offs between ecological integrity and human uses, such as hydropower, flood control, fisheries and ...
Christian Schlautmann, Robert Arlinghaus, Daniel Hering, Armin W. Lorenz, Christian Wolter, Christian Schürings   +5 more
wiley   +1 more source

Programmed Genome Elimination Is Evolutionarily Conserved Across Pelophylax Hybrids—As Evidenced by P. grafi Hybridogenetic Reproduction

Biology
Gametogenesis is a fundamental biological process that ensures both genetic recombination and the continuity of successive generations. Interspecific hybrids can reproduce through modified mechanisms, such as hybridogenesis, by transmitting clonal ...
Anna Dudzik, Beata Rozenblut-Kościsty, Dmitrij Dedukh, Pierre-André Crochet, Lukáš Choleva, Monika Przewłocka-Kosmala, Zuzanna Stryczak, Maria Ogielska, Magdalena Chmielewska   +8 more
doaj   +1 more source

Genome‐wide and gene‐specific DNA methylation across developmental stages in Pogonomyrmex californicus: A socially polymorphic ant

Insect Molecular Biology, EarlyView.
Comparison between developmental stages (larvae, pupae, worker) in Pogonomyrmex californicus revealed significant stage‐specific differences in Gene Body Methylated frequencies. Methylation sites were highly correlated between WGBS and ONT in P. californicus Genome‐wide methylation was low (~3%) and highly clustered within gene bodies (GBM), especially
Tania Chavarria‐Pizarro, Mohammed Errbii, Janina Rinke, Lukas Schrader, Jürgen Gadau   +4 more
wiley   +1 more source

The full-length BEND2 protein is dispensable for spermatogenesis but required for setting the ovarian reserve in mice

eLife
Infertility affects up to 12% of couples globally, with genetic factors contributing to nearly half of the cases. Advances in genomic technologies have led to the discovery of genes like Bend2, which play a crucial role in gametogenesis.
Yan Huang, Nina Bucevic, Carmen Coves, Natalia Felipe-Medina, Marina Marcet-Ortega, Nikoleta Nikou, Cristina Madrid-Sandín, Maria López-Panadés, Carolina Buza, Neus Ferrer Miralles, Antoni Iborra, Anna Pujol, Alberto M Pendás, Ignasi Roig   +13 more
doaj   +1 more source

Seasonal reproduction in a fluctuating energy environment: Insolation-driven synchronized broadcast spawning in corals [PDF]

, 2010
*Background/Question/Methods:* Colonies of spawning corals reproduce in mass-spawning events, in which polyps within each colony release sperm and eggs for fertilization in the water column, with fertilization occurring only between gametes from ...
Bharath Ananthasubramaniam, Daniel E. Morse, Francis J. Doyle, Roger M. Nisbet   +3 more
core   +2 more sources

New insights into the putative XX/XY sex chromosomal system in blue‐eyed red‐fin pleco Hypostomus soniae (Siluriformes, Loricariidae)

Journal of Fish Biology, EarlyView.
Abstract Blue‐eyed red‐fin pleco Hypostomus soniae (family Loricariidae) presented a putative sex system XX/XY in early stage. Aiming to explore the inter‐populational karyotypic variation and proposed emergence of the XX/XY system, we studied 13 H. soniae individuals (6 males, 7 females) from the Tapajós River.
Luan Aércio Melo Maciel, Renata Coelho Rodrigues Noronha, Bruno Rafael Ribeiro de Almeida, Manoella Gemaque Cavalcante, Cleusa Yoshiko Nagamachi, Julio Cesar Pieczarka, Luís Reginaldo R. Rodrigues   +6 more
wiley   +1 more source

Ca ²⁺ signals critical for egress and gametogenesis in malaria parasites depend on a multipass membrane protein that interacts with PKG

, 2021
Aurélia C. Balestra, Konstantinos Koussis, Natacha Klages, Steven Howell, Helen R. Flynn, Marcus Bantscheff, Carla Pasquarello, Abigail J. Perrin, Lorenzo Brusini, Patrizia Arboit, Olalla Sanz, Laura Peces-Barba Castaño, Chrislaine Withers‐Martinez, Alexandre Hainard, Sonja Ghidelli‐Disse, Ambrosius P. Snijders, David A. Baker, Michael J. Blackman, Mathieu Brochet   +18 more
openalex   +1 more source

Proteomic analysis of the zone of degeneration at the mitosis–meiosis transition stage in wild‐caught male catshark (Scyliorhinus canicula), correlated with an unusually high‐water temperature in the English Channel

Journal of Fish Biology, EarlyView.
Abstract In the context of current global change, variations in water temperature are one of the environmental conditions with serious consequences for marine life, including reproductive processes. In the small spotted catshark Scyliorhinus canicula, spermatogenesis occurs in spermatocysts composed of synchronously developing germ cells associated ...
Fabian Jeanne, Stanislas Pilet, Sean Heighton, Benoît Bernay, Pascal Sourdaine   +4 more
wiley   +1 more source

Seasonal changes in serum testosterone, 11-ketotestosterone, and 1713-estradiol levels in the brown bullhead, Ictalurus nebuIosus Lesueur [PDF]

, 1984
The seasonal changes in gonadosomatic index (GSI) and strum testosterone, I I-ketotestosterone, and 17&estmdiol levels were measured in adult feral brown bullheads, Ictalurus nebulosus Lzsueur.
Burke, MG, Leatherland, JF, Sumpter, JP
core  

Biological aspects and population dynamics of the European pilchard Sardina pilchardus (Walbaum, 1792) in the southeastern Mediterranean waters

Journal of Fish Biology, EarlyView.
Abstract The European pilchard, Sardina pilchardus, is a key small pelagic fish sustaining Mediterranean ecosystems and fisheries. This study represents the first comprehensive biological and population dynamics assessment of the European pilchard by applying the length‐based spawning potential ratio (LB‐SPR) approach to S.
Mohab Badreldin, Reda M. Fahim, Lafi Al Solami, Hatem H. Mahmoud   +3 more
wiley   +1 more source