Article
Ecology
Timothee Schwartz, Aurelien Besnard, Jesus M. Aviles, Teresa Catry, Andrzej Gorski, Orsolya Kiss, Deseada Parejo, Edmunds Racinskis, Laimonas Sniauksta, Milda Sniaukstiene, Otto Szekeres, Ines Catry
Summary: Life-history theory predicts that animals develop trade-offs between survival and reproduction, resulting in a continuum of strategies among species. This study found a negative correlation between survival and clutch size in European roller populations, with slower pace-of-life in the north and faster pace-of-life in the south, contrary to inter-specific studies.
Article
Biodiversity Conservation
Lara E. Silva, Rodrigo R. Domingues, Naiara G. Sales, Priscila M. S. Villela, Camila Barbosa Silva, Alexandre W. S. Hilsdorf
Summary: The construction of hydroelectric dams threatens the biodiversity of Neotropical fish fauna, particularly the migratory fish species. By analyzing over 5400 eggs and larvae from the Teles Pires River, it was found that the dam had a putative impact on the ichthyoplankton community, with differences in species richness between the reservoir and tributaries. This study demonstrates the potential of ichthyoplankton metabarcoding for studying migratory fishes and provides relevant data for fisheries management and conservation.
BIOLOGICAL CONSERVATION
(2023)
Article
Multidisciplinary Sciences
Kelly Rivera-Coley, David Augusto Reynalte-Tataje, Victor Atencio-Garcia, Omer Campo, Luz Jimenez-Segura
Summary: Spawning sites are crucial for the reproduction of fish populations. The Nechi River is an important spawning area in the Magdalena River basin, but it is threatened by dam construction. The study found that there is an association between the presence of ichthyoplankton and the distance to the dam, as well as the presence of floodplains along the river.
Article
Fisheries
Travis M. Apgar, Joseph E. Merz, Benjamin T. Martin, Eric P. Palkovacs
Summary: Variation in juvenile migratory life histories of Ocean-type Chinook salmon is influenced by factors such as available freshwater rearing habitat, relative juvenile density, and spring flow patterns. Smaller streams and higher conspecific densities tend to produce more non-natal rearing migrants, while larger streams and lower conspecific densities produce more natal rearing migrants. These findings highlight the importance of considering environmental factors in conservation efforts to protect juvenile migratory diversity.
ECOLOGY OF FRESHWATER FISH
(2021)
Article
Multidisciplinary Sciences
Jerome Chie-Jen Ko, An-Yu Chang, Ruey-Shing Lin, Pei-Fen Lee
Summary: This study assessed the population trends and seasonal habitat preference of migratory landbirds in the East Asian Flyway, and found that about 41.3% of the bird species are declining, with most having a higher preference for forest habitats during the breeding season. Although deforestation occurred throughout the annual cycle for 93.4% of the species, the change in forest cover in the non-breeding range was not identified as the main driver of population trend. Instead, the forest cover change in the species' regional breeding range interacted positively with the degree of breeding season forest preference in predicting population trends.
SCIENTIFIC REPORTS
(2023)
Article
Fisheries
Madeline C. Lewis, Christopher S. Guy, Eric W. Oldenburg, Thomas E. McMahon
Summary: Fragmentation of rivers poses a threat to migratory fish, and this study used a PIT-tag system to assess the out-migration dynamics of bull trout. The largest fish were more likely to out-migrate at age 1, and changes in abiotic factors acted as cues for migration, with the direction varying by season.
Article
Biochemistry & Molecular Biology
Anna Tigano, Michael A. Russello
Summary: This study investigated the genomic basis of reproductive and migratory behavior in sockeye salmon and kokanee. The results showed that there were three main blocks of sequence differentiation on chromosomes 7, 12, and 20 associated with migratory behavior, spawning location, and spawning timing. Structural variants in these regions could contribute to ecotypic differentiation either as causal variants or through recombination suppression mechanisms. Genes in these regions were related to spatial memory, swimming endurance, eye and brain development, and timing of migration, which could explain the differences in behavior and habitats among the different ecotypes.
Article
Entomology
Christer Wiklund, Magne Friberg
Summary: Studies have shown that migratory butterfly species have lower fecundity and delayed reproduction compared to non-migratory species. This suggests that a migratory lifestyle may come with a reproductive cost, while non-migratory species may be more favorable for reproduction.
ECOLOGICAL ENTOMOLOGY
(2022)
Article
Biology
Lifang Xiao, Conrad Labandeira, David Dilcher, Dong Ren
Summary: This study evaluated plant specimens from the latest Albian Dakota Formation in midcontinental North America and found evidence suggesting the earliest angiosperms were pollinated by a diverse insect fauna. The data supports the rapid emergence of early angiosperms and associated pollinator guilds at both local and regional community levels.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2021)
Article
Evolutionary Biology
Jeffrey T. Strait, Lisa A. Eby, Ryan P. Kovach, Clint C. Muhlfeld, Matthew C. Boyer, Stephen J. Amish, Seth Smith, Winsor H. Lowe, Gordon Luikart
Summary: Human-mediated hybridization can increase growth rates of native cutthroat trout under warmer conditions, but reduce growth rates during cooler periods. Non-native admixture consistently boosts expression of migratory behavior, indicating a genomic basis for life-history differences between species.
EVOLUTIONARY APPLICATIONS
(2021)
Article
Ecology
Washington C. S. Mendonca, Wallice P. Duncan, Marcelo D. Vidal, William E. Magnusson, Ronis Da Silveira
Summary: Ecotourism, while important for biodiversity conservation, may have negative effects on animal health and welfare. A study in Anavilhanas National Park, Brazil revealed that interactions between tourists and Amazonian crocodilians led to increased levels of corticosterone and lactate in black caimans, but not in spectacled caimans. These findings have implications for the management and conservation of Amazonian crocodilians, especially in tourism programs.
JOURNAL OF WILDLIFE MANAGEMENT
(2023)
Article
Marine & Freshwater Biology
Antonio Saulo Cunha-Machado, Izeni Pires Farias, Tomas Hrbek, Maria Doris Escobar, Jose Antonio Alves-Gomes, Kyara Martins Formiga, Jacqueline da Silva Batista
Summary: In the Amazonian Basin, the large catfish Pseudoplatystoma punctifer is an important top predator. Research shows that the rapids of the Madeira River, both upstream and downstream, do not completely block the gene flow of catfish.
Article
Biodiversity Conservation
Cristhiana Ropke, Tiago H. S. Pires, Nagila Zuchi, Jansen Zuanon, Sidineia Amadio
Summary: Abnormal hydroclimatic events in the Amazon have been found to impact fish reproduction and demographic parameters, leading to a decrease in the proportion of mature females and a reduction in the average body size of ripe females. These effects are observed in both fished and non-fished species, highlighting the need for conservation policies to address the impact of droughts and fishing pressure.
JOURNAL OF APPLIED ECOLOGY
(2022)
Review
Environmental Sciences
Florian Wittmann, John Ethan Householder, Maria Teresa Fernandez Piedade, Jochen Schongart, Layon Oreste Demarchi, Adriano Costa Quaresma, Wolfgang J. Junk
Summary: Amazonian floodplain forests along large rivers consist of two distinct floras, which are influenced by different sediment and nutrient environments. Despite the adaptation of tree species to seasonal floods, there are significant differences in ecosystem fertility, disturbance regimes, water shortage and drought, fire, and microclimates between the two ecosystems. These differences largely explain the variations in forest productivity, taxonomic composition, and diversity. Additionally, the two ecosystems track different species life-history traits.
Article
Multidisciplinary Sciences
Kristofer Bergstrom, Oscar Nordahl, Peter Soderling, Per Koch-Schmidt, Tobias Borger, Petter Tibblin, Per Larsson
Summary: A study on the growth and age of Wels catfish in Sweden reveals that the northernmost populations in Europe have slower growth rates and longer lifespans compared to catfish in central Europe, potentially due to lower temperatures and/or local adaptations.
SCIENTIFIC REPORTS
(2022)
Article
Environmental Sciences
Jens C. Hegg, Breanna Graves, Chris M. Fisher
Summary: This study is the first to retrieve temporally explicit chemical data from sawfish rostral teeth, showing that multiple chemical tracers can be recovered from them to understand the movement across salinity gradients. Sawfish rostral teeth contain repeated structures and indistinct banding, which could potentially be used for age or growth analysis of the fish.
AQUATIC CONSERVATION-MARINE AND FRESHWATER ECOSYSTEMS
(2021)
Article
Environmental Sciences
Caroline da Silva Montes, Maria Auxiliadora Pantoja Ferreira, Tommaso Giarrizzo, Lilian Lund Amado, Rossineide Martins Rocha
Summary: The study evaluated the environmental status of rivers in the Tapajos Region by analyzing mercury concentration and biomarkers in fish tissues. Results showed significant differences between the rivers and the Reference site, with biomarker responses varying based on the site of collection. The findings suggest that mercury pollution has had a long-lasting impact on the rivers, leading to hazardous biomarker responses in fish tissues.
Article
Ecology
Jens C. Hegg, Brian P. Kennedy
Summary: Ecological patterns are often based on chronological time series, and DTW, a method capable of efficiently comparing series despite temporal offsets, is seldom used in ecology. DTW can detect subtle behavioral patterns within data sets that traditional techniques cannot.
Article
Environmental Sciences
Ryan Andrades, Jean-Christophe Joyeux, Raphael M. Macieira, Bruno Spacek Godoy, Jose Amorim Reis-Filho, Andrew L. Jackson, Tommaso Giarrizzo
Summary: The study analyzes stable isotopes and distributional data to predict competitive relationships among fish species, finding that benthic fishes face high intraspecific trophic pressure due to high densities and small niche sizes, with benthic behavior, feeding specialization, and small sizes being important factors influencing their competitive success rate.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Fisheries
Jose Amorim Reis-Filho, Tommaso Giarrizzo
Summary: Unmanned aerial vehicles (UAVs) are increasingly utilized in marine wildlife research and small-scale fisheries surveys, offering potential for improved management practices with tailored data gathering strategies. Overcoming challenges such as funding limitations and survey design is crucial for the widespread adoption of UAV technology in fisheries management.
Article
Environmental Sciences
Valter M. Azevedo-Santos, Larissa M. Marques, Clarissa R. Teixeira, Tommaso Giarrizzo, Rodrigo Barreto, Jorge L. Rodrigues-Filho
Summary: Abandoned, lost, or otherwise discarded fishing gear (ALDFG) has significant negative impacts on Brazilian marine biodiversity, especially ghost nets. These gear affect a variety of marine species, including threatened species and animals within marine protected areas. The true extent of the damage caused by ghost nets in the Brazilian marine ecosystem is still underestimated and somewhat obscure.
MARINE POLLUTION BULLETIN
(2021)
Article
Environmental Sciences
Lucio Brabo, Ryan Andrades, Simone Franceschini, Marcelo Oliveira Soares, Tommaso Russo, Tommaso Giarrizzo
Summary: This study assessed beach litter pollution in a prominent touristic site in Brazil and identified pollution hotspots and significant drivers using a delta-generalized additive modeling approach. The findings highlight the importance of factors such as beach extension, tourist attractions, wind angle, and distance to water bodies and villages in influencing the distribution of litter types.
MARINE POLLUTION BULLETIN
(2022)
Article
Fisheries
Jose Amorim Reis-Filho, Jean-Christophe Joyeux, Caio Ribeiro Pimentel, Joao Batista Teixeira, Raphael Macieira, Ricardo C. Garla, Thayna Mello, Joao Luiz Gasparini, Tommaso Giarrizzo, Luiz Rocha, Hudson T. Pinheiro
Summary: This study investigates the utility of aerial drones in directly georeferencing fishing activities to improve fishery studies, particularly in Marine Protected Areas. The research was conducted in a potential deregulation marine sanctuary in Brazil, documenting fishing activities and shoreline fishing efforts. The results highlight the importance of aerial monitoring in assessing the impact of expanded fishing activity and enforcing conservation rules.
FISHERIES MANAGEMENT AND ECOLOGY
(2022)
Article
Fisheries
Antonio B. Anderson, Manuela B. Bernardes, Hudson T. Pinheiro, Helder C. Guabiroba, Caio R. Pimentel, Ciro C. Vilar, Luiz E. O. Gomes, Angelo F. Bernardino, Stephanie D. T. Delfino, Tommaso Giarrizzo, Carlos E. L. Ferreira, Jean-Christophe Joyeux
Summary: The red porgy is a carnivorous fish that inhabits sandy bottoms, rhodolith beds, and seagrass beds in the Mediterranean Sea and the Atlantic Ocean. Due to overfishing and the effects of global warming, the population of red porgy has declined, making conservation efforts crucial.
JOURNAL OF FISH BIOLOGY
(2022)
Article
Biodiversity Conservation
Caio Ribeiro Pimentel, Hudson T. Pinheiro, Tommaso Giarrizzo, Ronaldo B. Francini-Filho, Jose Amorim Reis-Filho, Luiz A. Rocha, Carlos Eduardo L. Ferreira, Moyses Cavichioli Barbosa, Jean-Christophe Joyeux
Summary: Geographic isolation, low species richness, and high endemism create ideal conditions for studying fish assemblages in oceanic islands. The Saint Peter and Saint Paul's Archipelago, located in the equatorial Atlantic Ocean, provides valuable insights into the taxonomic, trophic, and size structures of fish communities in pelagic and mesophotic reef ecosystems. The presence of steep reef walls facilitates the study of ecological connections between these two ecosystems.
Article
Environmental Sciences
Juliana De Souza-Araujo, Nigel E. Hussey, Rachel Ann Hauser-Davis, Andre Hendrique Rosa, Marcelo de Oliveira Lima, Tommaso Giarrizzo
Summary: This study evaluated the burden of As, Hg, Pb, and Cd in 314 marine fishes from the Amazon Coast. The results showed higher Hg concentrations in reef-associated fish compared to demersal fish. The study also found correlations between As, Pb, and Cd, suggesting similar dispersion properties and bioaccumulation homology. The concentrations of As exceeded guidelines and legal limits in a majority of the examined species, while Cd, Hg, and Pb levels were generally low. The estimated daily intake of iAs, Hg, and Pb were found to pose potential non-carcinogenic health risks.
Article
Fisheries
Paul Chittaro, Jens Hegg, Abby Fuhrman, Devin Robichaux, Rothboury Doung, Brian Beckman, Chris Fisher, Jeff Vervoort, Brian Kennedy
Summary: Effective species management requires understanding movement and habitat use patterns. This study used isotopes in fish otoliths to investigate the natal origin of fall Chinook salmon. The study found a transition in isotopic sources during otolith development, but the dietary contribution made it difficult to accurately determine the natal origin. This research contributes to species management and conservation efforts.
ECOLOGY OF FRESHWATER FISH
(2023)
Article
Multidisciplinary Sciences
M. Pilar Cabezas, Oscar M. Lasso-Alcala, Elena Quintero-T, Raquel Xavier, Tommaso Giarrizzo, Jorge L. S. Nunes, Fabiola S. Machado, Jesus Gomez, Wellington Silva Pedroza, Michael J. Jowers
Summary: Omobranchus punctatus is a complex of species consisting of at least five distinct and geographically restricted species. Genetic analysis confirmed the differentiation of O. punctatus sensu stricto, O. dispar, and O. sewalli as separate species.
SCIENTIFIC REPORTS
(2022)
Article
Environmental Sciences
Friedrich W. Keppeler, Marcelo C. Andrade, Paulo A. A. Trindade, Leandro M. Sousa, Caroline C. Arantes, Kirk O. Winemiller, Olaf P. Jensen, Tommaso Giarrizzo
Summary: Hydropower plants, such as the Belo Monte hydroelectric complex, pose a threat to freshwater fishes in the Xingu River. The operation of the dam has led to declines in species richness, changes in fish body size and trophic level, and alterations in average body shape. The impacts are particularly negative for certain fish families. Functional and phylogenetic diversity have been subtly affected, but a decline in functional divergence suggests a potential decline in species abundance at the extremities of functional space. Continuing monitoring is necessary to fully understand the ecological impacts as hydropower operations increase.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Tamyris Pegado, Lucio Brabo, Kurt Schmid, Francesco Sarti, Thais T. Gava, Jorge Nunes, David Chelazzi, Alessandra Cincinelli, Tommaso Giarrizzo
Summary: This study is the first to document the ingestion of microplastics by Longnose stingrays in the Western Atlantic Ocean. It found that fibers were the most common type of microplastic ingested and provided a baseline for future research on microplastic ingestion by dasyatid rays in the Atlantic Ocean.
MARINE POLLUTION BULLETIN
(2021)