Results 11 to 20 of about 68 (65)

Conservation threats and future prospects for the freshwater fishes of Ecuador: A hotspot of Neotropical fish diversity. [PDF]

J Fish Biol, 2021
ABSTRACT Freshwater fish communities in Ecuador exhibit some of the highest levels of diversity and endemism in the Neotropics. Unfortunately, aquatic ecosystems in the country are under serious threat and conditions are deteriorating. In 2018–19, the government of Ecuador sponsored a series of workshops to examine the conservation status of Ecuador's ...
Aguirre WE, Alvarez-Mieles G, Anaguano-Yancha F, Burgos Morán R, Cucalón RV, Escobar-Camacho D, Jácome-Negrete I, Jiménez Prado P, Laaz E, Miranda-Troya K, Navarrete-Amaya R, Nugra Salazar F, Revelo W, Rivadeneira JF, Valdiviezo Rivera J, Zárate Hugo E.   +15 more
europepmc   +2 more sources

Does invasion by armored catfish shift trophic ecology of native fishes? Evidence from stable isotope analysis

Ecology, Volume 104, Issue 5, May 2023., 2023
Abstract Popular as aquarium fish, armored catfishes from South America (Pterygoplichthys spp.) have been introduced and become invasive in tropical and subtropical regions worldwide. These ecosystem engineers can deplete basal resources (e.g., periphyton and detritus), with potential negative effects for native fauna. We studied the trophic ecology of
Yasmín Quintana, Friedrich Wolfgang Keppeler, Kirk O. Winemiller   +2 more
wiley   +1 more source

Taste for pollen comes in different shapes: Consumption by tadpoles from three divergent ecomorphotypes

Journal of Zoology, Volume 320, Issue 1, Page 42-52, May 2023., 2023
We studied pollen consumption and breakage of pollen grains by tadpoles of three different ecomorphotypes likely to influence ease of access to different feeding microhabitats. We found tadpoles adapted to feed on the water surface (where pollen is first available to aquatic food webs) to eat more pollen and break relatively more grains, which is ...
J. S. Kloh, C. C. Figueredo, D. B. Provete, P. C. Eterovick   +3 more
wiley   +1 more source

Taxonomic Diversity of Decapod and Stomatopod Crustaceans Associated with Pocilloporid Corals in the Central Mexican Pacific

Diversity, 2022
Many crustacean species are obligate associates of pocilloporid corals, where they feed, reproduce, and find shelter. However, these coral-associated crustaceans have been poorly studied in the eastern tropical Pacific.
Arizbeth Alonso-Domínguez, Manuel Ayón-Parente, Michel E. Hendrickx, Eduardo Ríos-Jara, Ofelia Vargas-Ponce, María del Carmen Esqueda-González, Fabián Alejandro Rodríguez-Zaragoza   +6 more
doaj   +1 more source

Dinámicas territoriales en asentamientos de pescadores artesanales: economías, experiencias y conflictos. El caso de Guabún y Puñihuil en la Comuna de Ancud, Chiloé

Cultura-Hombre-Sociedad, 2012
Las transformaciones socioeconómicas y ambientales de las caletas de pescadores, derivadas de la temprana inserción del sector en la economía internacional, se suman a diversos procesos de transición a la modernidad que afectan a las sociedades que ...
Jaime Valderrama Bravo, Francisco Ther Ríos   +1 more
doaj   +1 more source

Biomonitoramento e pressões da urbanização: Uma abordagem integrada entre Ecologia e Geografia na bacia do rio das Velhas

Revista Espinhaço, 2019
A caracterização de bacias hidrográficas e o desenvolvimento de ferramentas de diagnóstico de qualidade ambiental para subsidiar o manejo sustentável de recursos hídricos requerem abordagens interdisciplinares.
Marcos Callisto, Pablo Moreno, Diego Rodrigues Macedo   +2 more
doaj   +1 more source

Cambios alimenticios en tres especies de Sphoeroides (Tetraodontiformes: Tetraodontidae) posterior al huracán Isidoro en Bocana de la Carbonera, Sureste del Golfo de México

Revista de Biología Tropical, 2010
Se analizan los cambios producidos por el huracán Isidoro en la repartición de los recursos alimenticios de tres especies de peces de la familia Tetraodontidae (Sphoeroides nephelus, S.
Sonia Eugenia Palacios-Sánchez, María Eugenia Vega-Cendejas   +1 more
doaj   +2 more sources

Shearing Tooth Morphology May Allow Sharks to Access Higher Trophic Levels at Smaller Sizes

Ecology and Evolution, Volume 15, Issue 8, August 2025.
Predator morphology imposes limitations on prey selection due to biomechanical constraints, making some prey functionally inaccessible and thereby constraining predator trophic niches. We assessed how two key components of trophic morphology—tooth shape and body size—affect prey selectivity and trophic niche in two sympatric sharks with contrasting ...
Sabrina Riverón, Vincent Raoult, David J. Slip, Federico Mas, Martín Laporta, Inés Pereyra, Santiago Silveira, Robert G. Harcourt   +7 more
wiley   +1 more source

Reciprocal contributions: Indigenous perspectives and voices on marine‐coastal experiences in the channels of northern Patagonia, Chile

People and Nature, Volume 7, Issue 5, Page 1086-1098, May 2025.
Abstract The recovery of marine ecosystems in areas heavily impacted by fishing and environmental exploitation depends, to some extent, on the sustainable management of resources and should be complemented by cultural traditions, practices and scientific knowledge.
Ricardo Alvarez, Daniel Caniullán, Juan Catín, Pérsida Cheuquenao, Yohana Coñuecar, Florencia Diestre, Pedro Jara, Nelson Millatureo, Darly Vargas, Jaime Ojeda   +9 more
wiley   +1 more source

Modeling winter circulation and particle retention in the Magdalena-Almejas Bay lagoon system (Baja California Sur, Mexico)

Ciencias Marinas, 2006
Se describe la circulación y el transporte pasivo de partículas en las inmediaciones del sistema lagunar Bahía Magdalena- Almejas mediante un modelo lineal de circulación en el dominio de la frecuencia con el que se obtuvieron los campos básicos de flujo.
MV Morales-Zárate, AL Aretxabaleta, FE Wermer, SE Lluch-Cota   +3 more
doaj   +1 more source