Results 71 to 80 of about 26,825 (204)

Gametic isolation in guppies ( Poecilia reticulata ) [PDF]

Proceedings of the Royal Society B: Biological Sciences, 2006
Post-mating reproductive isolating mechanisms may be among the earliest reproductive barriers to emerge among incipient species. Trinidadian guppy, Poecilia reticulata , populations in the Caroni and Oropouche drainages in Northern Trinidad exhibit marked genetic divergence and provide an ...
A M, Ludlow, A E, Magurran
openaire   +2 more sources

Aspects of the Histopathology of Clarias gariepinus Infected With the Camallanid Parasite Procamallanus (Procamallanus) pseudolaeviconchus Moravec and Van As, 2015

Journal of Fish Diseases, EarlyView.
ABSTRACT Histopathological studies of infections with the nematode Procamallanus (Procamallanus) pseudolaeviconchus Moravec and Van As, 2015, an intestinal parasite of Clarias gariepinus (Burchell, 1822), are scarce. The current study describes histopathological changes in the stomach of C. gariepinus infected with P.
Thabo Kenneth Matea, Annemariè Avenant‐Oldewage   +1 more
wiley   +1 more source

Why we age

Biological Reviews, Volume 101, Issue 2, Page 911-925, April 2026.
ABSTRACT Three categories of explanations exist for why we age: mechanistic theories, which omit reference to evolutionary forces; weakening force of selection theories, which posit that barriers exist that prevent evolutionary forces from optimising fitness in ageing; and optimisation theories, which posit that evolutionary forces actually select for ...
Michael S. Ringel
wiley   +1 more source

ANÁLISE HISTOLÓGICA, HISTOQUÍMICA E ULTRAESTRUTURAL DA MUSCULATURA DORSAL E VENTRAL DO GUARU (Poecilia vivipara BLOCHI & SCHNEIDER, 1801)

Ciência Animal Brasileira, 2010
Poecilia vivipara (guaru), a neotropical, small, euryhalinefish, has been being used as a biomonitor. Dorsal and ventralmuscles of Poecilia vivipara were analyzed to standardize methodologiesfor evaluating the normal tissue structure, in order to usethem
Ana Paula Rezende dos Santos, Joana Cristina Neves de Menezes Faria, Simone Mar ia Teixeira de Sabóia-Morais   +2 more
doaj  

Tagging Very Small Fish: Two Effective and Low Impact Methods

Journal of Experimental Zoology Part A: Ecological and Integrative Physiology, Volume 345, Issue 3, Page 213-224, April 2026.
ABSTRACT Identifying individuals over time and across contexts is essential in many scientific fields. There are a variety of well‐established methods for uniquely marking individuals (e.g., visible implant elastomer, barcodes, paint). However, for some species, life history stages, and/or experiments, existing methods are not sufficient.
Deijah D. Bradley, Elianna J. Schimke, Alyssa P. Alvey, Hans A. Hofmann, Tessa K. Solomon‐Lane   +4 more
wiley   +1 more source

Capacidad larvívora del gold fish (carassius auratus auratus) y del guppy salvaje (poecilia reticulata) sobre larvas de aedes aegypti en condiciones de laboratorio

Revista Científica, 2010
El control biológico de vectores de importancia médica se presenta como una alternativa al uso de plaguicidas. La utilización de peces larvívoros se promueve como una nueva estrategia para el control de vectores.
Nereida Valero, Eddy Meleán, Mery Maldonado, Milagros MontieL, Yraima Larreal, Luz Marina Espina   +5 more
doaj  

Exposure to the Oestrogenic Pollutant 17α‐Ethinyl Estradiol (EE2) Does Not Alter the Behaviour of a Coastal Marine Fish, Cristiceps australis

Ethology, Volume 132, Issue 4, Page 295-304, April 2026.
Environmental contamination with the synthetic estrogen 17α‐ethinyl estradiol (EE2) is widespread in coastal ecosystems, yet behavioural effects in marine fishes remain poorly understood. We exposed southern crested weedfish (Cristiceps australis) to low and high EE2 concentrations for 14 days and assessed boldness and anxiety using a refuge‐use assay.
Shiho Ozeki, Rhiannon V. Eastment, Jack L. Manera, Raiko Rafeeq, Anne Peters, Jake M. Martin, Bob B. M. Wong   +6 more
wiley   +1 more source

DAYA PREDASI IKAN CUPANG (Betta splendens) DAN IKAN GUPPY (Poecilia reticulate) TERHADAP LARVA INSTAR III NYAMUK Aedes aegypti SEBAGAI UPAYA PENGENDALIAN VEKTOR PENYAKIT DEMAM BERDARAH DENGUE (DBD)

Sains Natural, 2017
Beta Fish Predation Power and Guppies Against the Third Instar Larvae of Mosquitos as a Vector Control Efforts in Dengue Fever          Dengue Hemorrhagic Fever (DHF) disease was a disease caused by dengue virus infection remains a public ...
Siti Mutmainah, Eko Prasetyo, Lilis Sugiarti   +2 more
doaj   +1 more source

Unprotected Waters: When Protection Fails In Freshwater

Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 36, Issue 3, March 2026.
ABSTRACT Invasive species are a major driver of biodiversity loss in protected areas (PAs), yet their impacts in aquatic environments are less well documented. This study investigated the occurrence and distribution of nonnative freshwater fish in federal PAs in Brazil.
Aymar Orlandi Neto, Éder André Gubiani, Igor Paiva Ramos   +2 more
wiley   +1 more source

Male sexually coercive behaviour drives increased swimming efficiency in female guppies [PDF]

, 2015
Sexual coercion of females by males is widespread across sexually reproducing species. It stems from a conflict of interest over reproduction and exerts selective pressure on both sexes.
Croft, Darren P., Darden, Safi K., Killen, Shaun S., Salin, Karine   +3 more
core   +2 more sources