Results: 588

Integridad biótica de la Laguna del Mar Muerto, México, basada en peces

Rev. biol. trop; 72 (1), 2024
Resumen Introducción: La laguna Mar Muerto es un ecosistema caracterizado por una gran productividad, de la cual dependen diversos organismos que la habitan; también es un sistema susceptible a impactos ambientales. Por lo anterior, se han desarrollado índices que permiten conocer el grado de altera...

Modelo de distribución geográfica del pez Coryphaena hippurus (Perciformes: Coryphaenidae) según el cambio climático en el Pacífico Oriental Tropical

Rev. biol. trop; 72 (1), 2024
Resumen Introducción: Coryphaena hippurus es una especie migratoria de interés comercial, que se encuentra en ambientes tropicales y subtropicales, prefiriendo zonas con un rango de temperatura entre 21 y 30 °C y salinidad cercana a 31 ppt. Aunque la tendencia poblacional del dorado es estable, la pe...

Sustainability of dual exploitation (fry and adults) of the fish Semaprochilodus laticeps (Characiformes: Prochilodontidae) in Colombia

Rev. biol. trop; 72 (1), 2024
Abstract Introduction: Semaprochilodus laticeps is a freshwater fish species native to the Orinoco Basin that is exploited in Colombia at two different stages of its life cycle: fry (for the ornamental trade) and adults (for the consumer market). This double exploitation of juveniles and adults raises c...

Effects of Bisphenol A on Male Gonadal Tissue of Viviparous Fish: Histopathological Evidence in Goodea atripinnis

Int. j. morphol; 42 (4), 2024
SUMMARY: BPA is a multifunctional endocrine disruptor with ubiquitous presence in aquatic ecosystems. The Mexican Central Plateau is an area severely impacted by pollution, inhabited by endemic viviparous fish. However, efforts to understand the effects of BPA on native species such as Goodea atripinnis ...

Predators of the sea urchin Diadema mexicanum (Diadematoida: Diadematidae) at the Eastern Tropical Pacific coral reefs

Rev. biol. trop; 72 (supl.1), 2024
Abstract Introduction: The coral reefs of Isla del Coco National Park are some of the most pristine ecosystems on Earth. The sea urchin Diadema mexicanum (Diadematoida: Diadematidae) is a common inhabitant with a pivotal role in the ecology of this unique ecosystem. Objective: In this study, we ident...

Performance evaluation of the commercial aquafeeds available in the market of Pakistan on Channa marulius (Sole)

Braz. j. biol; 84 (), 2024
Abstract The present study aimed to determine the effect of different levels of protein on the growth, body composition, amino acid profile and serology of Channa marulius fingerlings. The experiment was conducted in ten happas installed in earthen ponds, each stocked with 10 fishes for 90 days. Four com...

Growth performance and survivability of the Asian seabass Lates calcarifer (Bloch, 1790) reared under hyper-saline, hypo-saline and freshwater environments in a closed aquaculture system

Braz. j. biol; 84 (), 2024
Salinity is one of the most critical environmental parameters regarding fish physiology, modifying food intake and growth performance in many fish species. The present study has investigated the effects of different salinity levels on growth performance, feeding and survival of Asian seabass Lates calcar...

Biodiversity, distributions and isolation of microplastics pollution in finfish species in the Panjkora River at Lower and Upper Dir districts of Khyber Pakhtunkhwa province of Pakistan

Braz. j. biol; 84 (), 2024
The basic aim of this study was aimed to determine the ichthyofaunal diversity of River Panjkora in both upper and lower Dir districts in Khyber Pakhtunkhwa province of Pakistan.Fish samples were collected by using fishnets from March to September 2020. A total of 724 specimens were collected and classif...

Sequencing and multiple antimicrobial resistance of Pseudomonas fluorescens isolated from Nile tilapia fish in Egypt

Braz. j. biol; 84 (), 2024
Pseudomonas fluorescens is one of the main causes of septicemic diseases among freshwater fish, causing severe economic losses and decreasing farm efficiency. Thus, this research was aimed to investigate the occurrence of P. fluorescens in Nile Tilapia (O. niloticus) fish in Egypt, gene sequencing of 16S...