Results 51 to 60 of about 370 (173)

Beyond Hard Parts: Metabarcoding Advances Dietary Resolution in Threatened Amazonian Elasmobranchs

Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 36, Issue 5, May 2026.
ABSTRACT Elasmobranchs are highly vulnerable and are considered one of the most threatened vertebrates worldwide. Insights into diet can improve conservation measures. The bias of traditional morphological methods towards taxa with distinctive hard parts makes metabarcoding analysis a complementary tool to assess diet composition. Here, we analysed the
Alan Érik S. Rodrigues, Cintia Oliveira Carvalho, Jorge Luiz S. Nunes, Rafaela Maria S. Brito, Marcelo Ândrade, Carolina Oliveira Magalhães, Fabrício dos Anjos Santa Rosa, Audun Schrøder‐Nielsen, Hugo J. de Boer, Quentin Mauvisseau, Jonathan S. Ready, João Bráullio L. Sales   +11 more
wiley   +1 more source

Comparing Freshwater eDNA With Conventional Survey Methods to Detect Vertebrate Biodiversity in a Malagasy Tropical Rainforest

Environmental DNA, Volume 8, Issue 3, May–June 2026.
This study compares the efficacy of conventional surveys of vertebrate taxa to eDNA metabarcoding of freshwater samples from a tropical rainforest ecosystem in the Makira Forest Protected Area (MFPA), Madagascar. We demonstrate high but taxa‐varying efficacy of eDNA metabarcoding detections, reinforcing its use as a complementary biodiversity survey ...
Christina Biggs, Cosmo Le Breton
wiley   +1 more source

Effect of dietary carotenoids on reproducers of Amazon River prawn Macrobrachium amazonicum. Part 2: external coloration, accumulation of astaxanthin in body tissues and pigment stability in feed. [PDF]

, 2021
The color is an important factor to distinguish the commercialized Amazon river prawns. The accumulation of pigments in the body can vary according to the prawn?s diet. In this work, ethanolic extracts of ?buriti?
SANTOS, U. R. A. dos, GEMAQUE, T. C., LIMA, J. de F., CASTILHO, C. de L., MIRANDA FILHO, K. C., COSTA, D. P. da, DAMASCENO, L. F.   +6 more
core  

American manatees adjust their diet composition and trophic niche breadth across different coastal regions

Limnology and Oceanography Letters, Volume 11, Issue 3, May 2026.
Abstract Marine mammals can exhibit high plasticity in foraging strategies, but how such plasticity is driven by environmental conditions is poorly understood. The American manatee (Trichechus manatus), a large, endangered herbivore, inhabits marine, estuarine, and freshwater environments.
Camila Carvalho de Carvalho, Emma Deeks, Leandro L. Ciotti, Silvina Botta, Miriam Marmontel, Margareth Copertino, Fábia de Oliveira Luna, Fernanda Niemeyer Löffer Attademo, Vitor Luz Carvalho, João Carlos Gomes Borges, Alexandra Fernandes Costa, Renata Emin‐Lima, Pavel Kratina, Eduardo Resende Secchi   +13 more
wiley   +1 more source

DENSIDADE DE ESTOCAGEM PARA PRODUÇÃO DE ACARÁ-BANDEIRA EM VIVEIROS ESCAVADOS EM POLICULTIVO COM CAMARÃO-DA-AMAZÔNIA

Revista Caatinga, 2010
The aim of this study was to evaluate the production of Freshwater Angelfish (Pterophyllum scalare) in different stocking densities in cages polycultured with Amazon River Prawn (Macrobrachium amazonicum).
FELIPE DE AZEVEDO SILVA RIBEIRO, PAULO HENRIQUE JORGE, JOÃO BATISTA KOCHENBORGER FERNANDES, NILVA KAZUE SAKOMURA   +3 more
doaj  

Digestive proteases from wild and farmed male morphotypes of the Amazon river prawn (Macrobrachium amazonicum) [PDF]

Journal of Crustacean Biology, 2014
The aim of this study was to characterize digestive proteases from wild and farmed morphotypes in males of Macrobrachium amazonicum (Heller, 1862). The hepatopancreas of wild and earthen pond reared specimens were collected and homogenized. Unspecific activities of trypsin, chymotrypsin and leucine aminopeptidase were determined using specific ...
Silva Santos, Fabio Marcel da, Ribeiro, Karina, Vasconcelos de Freitas Junior, Augusto Cozar, Carvalho Junior, Luiz Bezerra de, Valenti, Wagner Cotroni, Bezerra, Ranilson de Souza   +5 more
openaire   +2 more sources

Aquatic and Terrestrial Invertebrates Support Fish Assemblages of Amazonian Streams

Freshwater Biology, Volume 71, Issue 5, May 2026.
ABSTRACT The Amazonian stream network is remarkable not only for its extent but also for its rich fish diversity. These streams are interconnected with the surrounding forests. However, key ecological aspects of Amazonian freshwater ecosystems, such as energy flows and carbon sources sustaining fish assemblages, remain poorly understood. In this study,
Pedro H. S. Basilio, Cecília G. Leal, Débora R. de Carvalho, Gabriel L. Brejão, Dennys H. C. Drager, Gilberto N. Salvador, Marcos A. Alves‐Filho, Vladimir E. Costa, Gabriel O. Ferraz, Gustavo S. Ferreira, Rafael P. Leitão, Luciano F. A. Montag, Jady V. A. S Santos, Everton C. Silva, Paulo S. Pompeu   +14 more
wiley   +1 more source

Macrobrachium amazonicum: an alternative for microbiological monitoring of aquatic environments in Brazil

Ciência Rural, 2014
This study aimed to evaluate the role of the Amazon River prawn, Macrobrachium amazonicum, as carrier of Candida spp., by analyzing the correlation between Candida spp. from these prawns and their environment (surface water and sediment), through M13-PCR
Raimunda Sâmia Nogueira Brilhante, Manoel de Araújo Neto Paiva, Célia Maria de Souza Sampaio, Carlos Eduardo Cordeiro Teixeira, Joyce Fonteles Ribeiro, Débora de Souza Collares Maia Castelo-Branco, Tereza de Jesus Pinheiro Gomes Bandeira, André Jalles Monteiro, Rossana de Aguiar Cordeiro, José Júlio Costa Sidrim, Frederico Ozanan Barros Monteiro, José Luciano Bezerra Moreira, Marcos Fábio Gadelha Rocha   +12 more
doaj   +1 more source

The Fragmented Landscape of Shrimp Life Cycle Assessments: Uncovering Methodological Dependence and Analytical Blind Spots

Reviews in Aquaculture, Volume 18, Issue 2, March 2026.
Reported environmental impacts of shrimp aquaculture from life cycle assessments (LCAs) vary by over fiftyfold. These discrepancies stem from methodological inconsistencies, which often outweigh actual differences in farming practices. Furthermore, areas of environmental concern including land use change, biodiversity, and toxicity impacts are excluded
Alena Calvo, Patrik J. G. Henriksson, E. J. Milner‐Gulland, Henry Travers, Joseph Poore   +4 more
wiley   +1 more source

Climate Change Will Enhance Hypercapnic Hypoxia Threatening Mangrove Habitats

Geophysical Research Letters, Volume 53, Issue 4, 28 February 2026.
Abstract Mangroves host many marine species and support fisheries in developing (sub)tropical countries. The suitability of mangrove habitats depends strongly thier the water chemistry. Here, we show how global warming and rising atmospheric CO2 will reduce dissolved oxygen and increase CO2 in mangrove waters.
Gloria M. S. Reithmaier, Ariel K. Pezner, Adam Ulfsbo, Frank Melzner, Isaac R. Santos   +4 more
wiley   +1 more source