Article
Microbiology
Jaime Romero, Osman Diaz, Claudio D. Miranda, Rodrigo Rojas
Summary: This study compares the composition of microbiota in the intestines of wild and aquaculture red cusk-eel and finds significant differences between the two. The microbiota in aquaculture conditions is dominated by Firmicutes, while in the wild conditions it is dominated by Tenericutes. Differences in predicted metabolic pathways were also observed, with a focus on lipid metabolism in the wild conditions.
Article
Fisheries
Phillip Dettleff, Rodrigo Zuloaga, Marcia Fuentes, Juan M. Estrada, Alfredo Molina, Juan A. Valdes
Summary: Research indicates that temperature can cause oxidative damage to post-ovulatory eggs of the red cusk-eel, with no effect on the ovary. Additionally, temperature influences the expression of quality markers on eggs, highlighting the need to consider these effects in red cusk-eel management.
JOURNAL OF FISH BIOLOGY
(2021)
Article
Biology
Phillip Dettleff, Rodrigo Zuloaga, Marcia Fuentes, Pamela Gonzalez, Jorge Aedo, Juan Manuel Estrada, Alfredo Molina, Juan Antonio Valdes
Summary: This study determined the effects of high-temperature stress on the liver of the red cusk-eel and found that it increases hepatic enzyme activity and causes oxidative damage. Transcriptional responses and pathways associated with unfolded protein response, heat shock response, and oxidative stress were also observed. These findings highlight the significant impact of high-temperature stress on the liver of this species, which should be considered for aquaculture and fisheries management.
Article
Fisheries
Monica Saldarriaga-Cordoba, Rute Irgang, Ruben Avendano-Herrera
Summary: Tenacibaculum dicentrarchi is an emerging pathogen that causes high economic losses in the salmon industry in Chile. Comparative analysis of the genome sequences of different strains provides insights into the virulence process of this bacterium.
JOURNAL OF FISH DISEASES
(2021)
Article
Biodiversity Conservation
Jhon Darly Chero, Luis nacari, Celso Luis Cruces, David Fermin Lopez, Edson Cacique, Ruperto Severino, Jorge Lopez, Jose Luis Luque, Gloria Saez
Summary: This study identified third-stage Anisakidae nematode larvae in Genypterus maculatus specimens captured off the coast of Lambayeque Region, Peru. These larvae were morphologically classified into three types and confirmed through mtDNA Cox2 sequence analysis to correspond to Anisakis pegreffii, Skrjabinisakis physeteris, and S. brevispiculata. The presence of S. brevispiculata in Peru is a new record. The findings contribute to understanding the diversity, distribution, and public health implications of Anisakis and Skrjabinisakis in the South American Pacific waters, emphasizing the need for molecular and morphological approaches in larval identification.
Article
Fisheries
Mauro Belleggia, Cecilia Diamela Alvarez, Emiliano Pisani, Mariana Descalzo, Eliana Zuazquita
Summary: This paper studied the diet of the pink cusk-eel Genypterus blacodes using stable isotope and stomach content analyses. The results showed that the pink cusk-eel mainly feeds on fish and crustaceans, with the most important prey being the notothenioid Patagonotothen ramsayi and the Argentine hake Merluccius hubbsi. The diet of the pink cusk-eel varied with body length, depth, and region.
FISHERIES RESEARCH
(2023)
Article
Microbiology
Benjamin Valderrama, Jose J. Ruiz, Maria Soledad Gutierrez, Katherine Alveal, Mario Caruffo, Marcia Oliva, Hector Flores, Alfonso Silva, Magaly Toro, Angelica Reyes-Jara, Paola Navarrete
Summary: This study characterized two unexplored yeast communities from the intestinal content of cultured marine Chilean fishes, identifying potential novel yeasts with applications in probiotics and other biotechnological fields. The diversity of enzymatic profiles exhibited by some isolates suggests the possibility of developing new applications such as probiotics and other biotechnological applications.
Article
Chemistry, Multidisciplinary
Pedro Gonzalez-Redondo, Fatima Quesada-Perez
Summary: This study evaluated the effects of different sibling contact regimes on egg performance and hatching synchrony in red-legged partridge eggs. The results showed that eggs in contact during the hatching phase had shorter incubation length and increased hatching synchrony. This indicates that allowing eggs to have contact during incubation can maximize hatching synchrony in artificial incubation.
APPLIED SCIENCES-BASEL
(2022)
Article
Anatomy & Morphology
Parmentier Eric, Stainier Gaelle, Boistel Renaud, Michael L. Fine, Kever Loic, Di Iorio Lucia, Bolgan Marta
Summary: This study investigates the sounds and the anatomy of the sound-producing organ in the male and female sand-dwelling cusk-eel Parophidion vassali. It found that while both sexes have similar external phenotype, they can be distinguished by their sonic apparatus and sounds. The study reveals the unique characteristics of the male's sound production mechanism and describes the differences in sound parameters between males and females. The findings contribute to a better understanding of the population distribution of these ecologically cryptic species.
JOURNAL OF ANATOMY
(2022)
Review
Biology
Jason D. Hogan, David J. Varricchio
Summary: For most dinosaurs, eggs consisted of a single layer of porous spherical to sub-spherical shape that were fully buried. However, with the evolution of pennaraptoran theropods, the eggs changed to a more elongated, less porous form and were only partially buried. Recent experiments suggest that partial egg burial combined with contact incubation may be more effective than previously thought. This hypothesis connects partially buried dinosaur clutches with the transition from buried clutches guarded by adults to the avian habit of contact incubating fully exposed eggs.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2023)
Article
Agriculture, Dairy & Animal Science
K. Damaziak, M. Koznaka-Lipka, D. Gozdowski, A. Golebiowska, E. Kedziorek
Summary: Preheating eggs can increase efficiency and improve hatchability of chicks in commercial broiler breeding. Different preheating profiles interact with flock age and breed, influencing hatchability and quality of chicks. Multi-stage slow heating of eggs is more advantageous than rapid temperature increase during incubation.
Article
Agriculture, Dairy & Animal Science
J. R. Cassar, L. M. Bright, P. H. Patterson, E. W. Mills, A. Demirci
Summary: In the United States, an average of 287.1 eggs are consumed per person annually, with over 14.1 billion eggs set in hatchery incubators for the egg and meat bird industries. Pulsed ultraviolet (PUV) light has been shown to effectively reduce microbial pathogens on the surface of shell eggs, providing a germicidal response. PUV light treatment shows no negative effects on fertility, hatchability, or posthatch observations for hatching eggs, making it a promising antimicrobial intervention for eggs.
Article
Reproductive Biology
Louise Marques Coelho, Ana Patricia Alves Leao, Laryssa Fernanda Bernardes, Victoria Veiga Alves, Bruna Gomes Martins, Juliano Vogas Peixoto, Luciano Jose Pereira, Edison Jose Fassani, Renata Ribeiro Alvarenga, Marcio Gilberto Zangeronimo
Summary: The study evaluated the impact of exposure to different colors of light during egg incubation on the reproductive parameters of male and female Japanese quails. It was found that light color did not significantly influence reproductive characteristics, although hatchability and growth rate were higher in the dark and under red LED light.
Article
Agriculture, Dairy & Animal Science
Lidija Peric, Mirjana Mitrakovic, Marinko Vekic, Mirjana Dukic Stojcic, Dragan Zikic, Dorde Savic, Ron Meijerhof, Stoja Jotanovic
Summary: In broiler breeder production, cracked or broken egg shells account for 2% of rejected hatching eggs, leading to reduced hatchability and lower chick quality. A study was conducted to examine the effect of sealing egg-shell cracks with surgical tape on hatching parameters. The results showed that sealing the cracks with tape improved egg weight loss during incubation and reduced embryonic mortality, resulting in hatching percentages comparable to the positive control group.
Article
Fisheries
Wei Yong-chun, Cheng Shun, Wang Dan-li, Chi Mei-li, Zheng Jian-bo, Jia Yong-yi, Li Fei, Liu Shi-li, Liu Yi-nuo, Gu Zhi-min
Summary: This study investigates the effects of nitrite, ammonia nitrogen, and pH on the artificial incubation of red claw crayfish. The results suggest that these factors have an impact on the hatching rate and survival rate. Maintaining appropriate levels of nitrite, ammonia nitrogen, and pH is crucial for stable and high production of red claw crayfish through artificial incubation.
AQUACULTURE RESEARCH
(2022)
Article
Fisheries
R. Oyarzun-Salazar, J. J. Rojas, J. P. Pontigo, O. Mardones, J. L. P. Munoz, P. Dantagnan, L. Vargas-Chacoff
Summary: The study found that E. maclovinus juveniles tolerate temperatures between 15 and 20 degrees Celsius, but temperatures of 25 degrees Celsius or higher could have lethal effects.
Article
Fisheries
John Quinones, Rommy Diaz, Patricio Dantagnan, Adrian Hernandez, Marco Valdes, Jose Manuel Lorenzo, David Cancino, Nestor Sepulveda, Jorge G. Farias
Summary: Dietary inclusion of Durvillaea antarctica meal can improve the fillet quality of rainbow trout fed with rapeseed oil, enhancing the nutritional value of the fish.
Article
Ecology
Alfredo H. Zuniga, Jaime R. Rau, Fabian M. Jaksic, Pablo M. Vergara, Francisco Encina-Montoya, Andres Fuentes-Ramirez
Summary: The study found that fires have short-term effects on the abundance and diversity of rodent species, particularly during the fall of the first year. Some species of rodents decreased in abundance as fire severity increased, with one species absent in burned areas.
Article
Biodiversity Conservation
A. H. Zuniga, V Fuenzalida, R. Sandoval, F. Encina
Summary: The study revealed that the chilla fox and the barn owl exhibit variations in dietary overlap during different seasons, potentially facilitating their coexistence in the study area based on differences in prey species and size.
ANIMAL BIODIVERSITY AND CONSERVATION
(2021)
Article
Environmental Sciences
Aydee Cornejo, Francisco Encina-Montoya, Francisco Correa-Araneda, Dalys Rovira, Gabriela Garcia, Carlos Nieto, Victor Villarreal, Nicomedes Jaramillo, Edgar Perez, Anayansi Valderrama, Javier Perez, Luz Boyero
Summary: Freshwater organisms exhibit varying sensitivity to pesticides, with three common detritivores being sensitive to insecticides and fungicides commonly used in concentrations that lead to significant mortality. Sensitivity to pesticides differs among species, with the highest sensitivity found for chlorpyrifos and chlorothalonil. Species sensitivity distributions show that the studied detritivores are among the most sensitive species to these pesticides, highlighting the importance of assessing ecological risks in tropical ecosystems.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2021)
Article
Environmental Sciences
Dante Rodriguez-Luna, Francisco Javier Alcala, Francisco Encina-Montoya, Nuria Vela
Summary: This article evaluates the performance of the Chilean Environmental Impact Assessment (EIA) System for sanitation projects and proposes improvements to enhance the effectiveness of monitoring and sanctions regarding the impact of sanitation projects on the environment and human health.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2022)
Article
Biochemistry & Molecular Biology
John Quinones, Rommy Diaz, Jorge F. Beltran, Lidiana Velazquez, David Cancino, Erwin Munoz, Patricio Dantagnan, Adrian Hernandez, Nestor Sepulveda, Jorge G. Farias
Summary: This study analyzed the effects of different feeds on the lipid composition of juvenile Oncorhynchus mykiss muscle and found that the inclusion of Brassica napus oil significantly increased certain lipid levels, while Durvillaea antarctica meal had a less significant impact on lipid variation.
Article
Environmental Studies
Dante Rodriguez-Luna, Francisco Encina-Montoya, Francisco Javier Alcala, Nuria Vela
Summary: This paper analyzes the performance of the Chilean Environmental Impact Assessment (EIA) system in mining projects and proposes opportunities for improvement, including simplified sanctioning procedures, upgraded project monitoring information delivery, early citizen participation, and incorporation of the climate change variable.
Article
Ecology
Alfredo H. Zuniga, Jaime R. Rau, Andres Fierro, Pablo M. Vergara, Francisco Encina-Montoya, Andres Fuentes-Ramirez, Fabian M. Jaksic
Summary: Fire is one of the main drivers of anthropogenic disturbances in temperate forest ecosystems worldwide. However, the biodiversity effects of fire on species-diverse groups such as arthropods are poorly understood. This study found that the response of arthropods to fire severity levels varied depending on their trophic guilds and years after fire. The results suggest that annual variation in environmental conditions triggers cascading effects for arthropods, and severely impacted forests support fluctuating and possibly unstable arthropod assemblages.
Article
Chemistry, Medicinal
Luis Marileo, Jacqueline Acuna, Joaquin Rilling, Paola Diaz, Antonio Luca Langellotti, Giovanni Luca Russo, Patricio Javier Barra, Patricio Dantagnan, Sharon Viscardi
Summary: Thraustochytrids are important sources of bioactive compounds, such as essential polyunsaturated fatty acids, which play a role in immune system regulation. This study explores the use of co-cultures of Aurantiochytrium sp. and bacteria to stimulate PUFA bioaccumulation. The co-culture of Lentilactobacillus kefiri K6.10 strain at 72 h gave the highest PUFA content.
Article
Agronomy
Marcia Zambrano Riquelme, Dante Rodriguez-Luna, Francisco Javier Alcala, Olga Rubilar, Marysol Alvear, Francisco Encina-Montoya, Gladys Vidal
Summary: The incrressed industrial pulp production has led to the need for alternative ways of handling the associated solid wastes to minimize the environmental impact. This study aimed to determine optimal composting conditions for pulp solid wastes by analyzing the influence of control variables on the composting process. The results showed that adding grits at a certain amount and controlling the composting process time resulted in mature compost and improved soil assimilation capability.
Article
Microbiology
Cinthia Vasquez-Sandoval, Jose Navarrete, Paula Herrera-Herrera, Patricio Dantagnan, Paola Diaz-Navarrete, Patricia Arancibia-Avila, Claudia Oviedo
Summary: The objective of this study is to isolate and identify native strains from different Chilean coastal environments and evaluate the effect of culture parameters on biomass production and arachidonic acid content. A total of nine strains were identified, and the Lng2 strain was the most prominent one for ARA production. Temperature had an effect on the PUFA profile, while the C/N ratio was identified as a key parameter.
Article
Fisheries
Cesar Toledo, Eduardo Rubilar, Lorena Marchant, Jessica Dorner, Lorenzo Marquez, Victor Martinez, Patricio Dantagnan
Summary: Jaw malformations during commercial production of Seriola lalandi larvae and juvenile fish in Chile and New Zealand were investigated in this study. The relationship between body long-chain PUFA (LC-PUFA) and malformation rate, as well as transcriptomic analysis of lipid metabolism-related genes, were analyzed. The results showed a decrease in malformation rate from August to December, which was associated with the rapid decline in DHA during early larval life and the highest abundance of DHA in neutral lipids at the end of the larval life.
Article
Pharmacology & Pharmacy
Leonardo Anabalon, Jaime Solano, Francisco Encina-Montoya, Marco Bustos, Alejandra Figueroa, David Gangitano
Summary: A rapid, effective, and low-cost method based on nuclear DNA and chloroplast DNA was developed to screen and detect contamination in commercial cannabis seeds. This method can serve as a quality control tool for cannabis seeds and other plant materials.
CANNABIS AND CANNABINOID RESEARCH
(2022)
Article
Marine & Freshwater Biology
Patricio De los Rios-Escalante, Francisco Encina-Montoya, Eriko Carreno, Francisco Correa-Araneda, Carlos Esse
Summary: Temporary pools in northern Chilean Patagonia showed marked differences in species richness under different water chemistry parameters, with the dominant species being the calanoid copepod. Community analysis using co-occurrence null models revealed a lack of structured patterns in species associations, with many repeated species occupying similar ecological niches. The results of this study align with observations from temporary pools in southern Chilean Patagonia.
