Results 61 to 70 of about 245 (154)

Opportunistic discovery of giant kōkopu (Galaxias argenteus) spawning in a tidal reach: site description and implications

New Zealand Journal of Marine and Freshwater Research, Volume 58, Issue 4, Page 577-590, December 2024.
ABSTRACT This paper reports the first observation of a giant kōkopu (Galaxias argenteus) spawning site in a tidal waterway and illustrates the usefulness of DNA barcoding for opportunistic discoveries that in this case involved the collection of a single egg.
Shane Orchard, Shaun Wilkinson
wiley   +1 more source

Bases biológicas para el cultivo del puye Galaxias maculatus (Jenyns, 1842): una revisión

Latin American Journal of Aquatic Research, 2013
Galaxias maculatus (Jenyns, 1842) es un pez gourmet de importancia comercial cuyas pesquerías están sobre-explotadas, siendo esencial el estudio de su biología para desarrollar su tecnología de cultivo (galaxicultura), que se encuentra en etapa piloto ...
Rolando Vega, Patricio Dantagnan, Alfonso Mardones, Iván Valdebenito, José Zamorano, Francisco Encina   +5 more
doaj  

Synergistic interactions within disturbed habitats between temperature, relative humidity and UVB radiation on egg survival in a diadromous fish.

PLoS ONE, 2011
Anthropogenic impacts, including urbanization, deforestation, farming, and livestock grazing have altered riparian margins worldwide. One effect of changes to riparian vegetation is that the ground-level light, temperature, and humidity environment has ...
Michael J H Hickford, David R Schiel
doaj   +1 more source

Patrones idiosincráticos de diversidad genética de peces nativos del Río San Pedro (Cuenca del Río Valdivia), un sistema de la región glaciada del sur de Chile Idiosyncratic patterns of genetic diversity of native fishes from Río San Pedro (Valdivia River Basin, Región de los Ríos, Chile): a system from glaciated region in southern Chile

Gayana, 2012
Estudiamos los niveles y patrones de variabilidad genética de ocho especies de peces nativos de la cuenca del río San Pedro (cuenca del río Valdivia, Región de los Ríos, Chile), con el objetivo de evaluar diferencias microevolutivas en especies sometidas
Pedro F . Victoriano, Iván Vera, Viviana Olmos, Mariem Dib, Bárbara Insunza, Carlos Muñoz-Ramírez, Rolando Montoya, Alfonso Jara, Evelyn Habit   +8 more
doaj  

The suitability of a dynamic coastal lake to support the diadromous fish Galaxias maculatus

Marine and Freshwater Research
Context Globally, intermittently closed and open lakes and lagoons (ICOLLs) can constitute highly productive coastal environments that support a range of fisheries. With growing pressures on fish communities, understanding the role of ICOLL management in population dynamics is increasingly important for ...
Christopher G. Meijer, Michael J. H. Hickford, Duncan P. Gray, David R. Schiel   +3 more
openaire   +1 more source

Social and metabolic mediation of growth performance in a temperate estuarine fish

Frontiers in Fish Science
Despite the importance of juvenile growth to lifetime fitness, high variability exists within many fish species where some individuals grow markedly faster than others.
Elizabeth C. Hoots, Juliet Bao Ngoc Doling, Luis L. Kuchenmüller, Michael R. Skeeles, Timothy D. Clark   +4 more
doaj   +1 more source

Relación longitud-peso y factor de condición de los peces nativos del río San Pedro (cuenca del río Valdivia, Chile) Weight-length relationships and condition factor of native fish from San Pedro River (Valdivia River basin, Chile)

Gayana, 2012
La relación longitud-peso y el factor de condición (K) son descriptores de gran interés en la biología de poblaciones de peces, ya que aportan información fundamental sobre estrategias de crecimiento, estado nutricional y reproducción.
Roberto Cifuentes, Jorge González, Germán Montoya, Alfonso Jara, Néstor Ortíz, Priscila Piedra, Evelyn Habit   +6 more
doaj  

Efecto de la temperatura en la sobrevivencia embrionaria del puye Galaxias maculatus (Jenyns, 1842)

Latin American Journal of Aquatic Research, 2013
Se evaluó el efecto de seis temperaturas constantes en la sobrevivencia embrionaria, periodo embrionario y periodo de eclosión de Galaxias maculatus de 7 a 22°C, en condiciones de laboratorio. Los resultados de la sobrevivencia embrionaria fueron: 90,6 ±
Juan Bariles, Eriko Carreño, Manuel Escudero, Ariel Bello   +3 more
doaj  

Feeding ω-3 PUFA enriched rotifers to Galaxias maculatus (Jenyns, 1842) larvae reared at different salinity conditions: effects on growth parameters, survival and fatty acids profile

Latin American Journal of Aquatic Research, 2013
Despite the well known importance of ω-3 polyunsaturated fatty acids (PUFA) in marine and freshwater fish larvae, there are few studies on how essential fatty acid requirements and composition on whole body can be altered by changes in water salinity ...
Patricio Dantagnan, Aliro Bórquez, Claudia Pavez, Adrián Hernández   +3 more
doaj  

Using biotracer techniques to uncover consumer diets: A comparison of stable isotopes, fatty acids, and amino acids

Ecosphere
Biotracers are commonly used in food‐web studies to estimate consumer diets. Increasingly, multiple biotracer types are combined to provide more nuanced pictures of consumer resource use, unravel more complex diet mixtures, and improve the discriminatory
Patrick J. Pickett, Georgia K. Dwyer, Ashley Macqueen, Galen Holt, Bryce T. Halliday, Jan L. Barton, Rebecca E. Lester   +6 more
doaj   +1 more source