A5058110445- Fish Ecology and Management Studies
- Aquatic Ecosystems and Biodiversity
- Fish biology, ecology, and behavior
- Fish Biology and Ecology Studies
- Isotope Analysis in Ecology
- Plant and animal studies
- Marine and fisheries research
- Genetic diversity and population structure
- Animal Behavior and Reproduction
- Species Distribution and Climate Change
- Aquatic Ecosystems and Phytoplankton Dynamics
- Coral and Marine Ecosystems Studies
- Wildlife Ecology and Conservation
- Horticultural and Viticultural Research
- Ecology and Vegetation Dynamics Studies
- Insect and Arachnid Ecology and Behavior
- Genomics and Phylogenetic Studies
- Animal Ecology and Behavior Studies
- Avian ecology and behavior
- Evolution and Paleontology Studies
- Ichthyology and Marine Biology
- Aquatic Invertebrate Ecology and Behavior
- Morphological variations and asymmetry
- Freshwater macroinvertebrate diversity and ecology
- Rangeland Management and Livestock Ecology
Smithsonian Tropical Research Institute
2014-2025
McGill University
2009-2025
Harvard University
2023-2025
Harvard University Press
2023-2025
Worcester State University
2020-2023
University of Massachusetts Boston
2019
Naos Marine and Molecular Laboratories
2015
Instituto de Investigaciones Científicas y Servicios de Alta Tecnología
2015
University of Toronto
2009
Age and size at maturation have declined dramatically in many commercial fish stocks over the past few decades - changes that been widely attributed to fishing pressure. We performed an analysis of such trends across multiple studies, test for consistency life history under fishing, their association with intensity exploitation (fishing mortality rate). analyzed 143 time series from 37 stocks, majority which originated North Atlantic. Rates phenotypic change were calculated two traditional...
Downing, A. S., E. Van Nes, J. Balirwa, Beuving, P. Bwathondi, L. Chapman, I. M. Cornelissen, G. Cowx, K. Goudswaard, R. Hecky, H. Janse, Janssen, Kaufman, Kishe-Machumu, Kolding, W. Ligtvoet, D. Mbabazi, Medard, O. C. Mkumbo, Mlaponi, T. Munyaho, Nagelkerke, Ogutu-Ohwayo, Ojwang, Peter, Schindler, Seehausen, Sharpe, Silsbe, Sitoki, Tumwebaze, Tweddle, de Wolfshaar, Dijk, Donk, Rijssel, Zwieten, Wanink, F. Witte, and Mooij. 2014. Coupled human natural system dynamics as key to the...
Urbanization is influencing patterns of biological evolution in ways that are only beginning to be explored. One potential effect urbanization modifying ecological resource distributions underlie niche differences and thus promote maintain species diversification. Few studies have assessed such modifications, or their evolutionary consequences, the context ongoing adaptive radiation. We study this Darwin's finches on Galápagos Islands, by quantifying feeding preferences diet partitioning...
Predation is considered to be an important factor structuring natural communities. However, it often difficult determine how may influence long-term, broad-scale, diversity patterns, particularly in diverse tropical systems. Biological introductions can provide powerful insight test the sustained consequences of predation communities, if pre-introduction data are available. Half a century ago, Zaret and Paine demonstrated strong immediate community-level effects following introduction novel...
Abstract Fishing and introduced species are among the most important stressors affecting freshwaters can also be strong selective agents. We examined combined effects of commercial fishing an predator (Nile perch, Lates niloticus ) on life history traits in African cyprinid fish ( Rastrineobola argentea native to Lake Victoria basin East Africa. To understand whether these two have driven shifts R. , we tested for associations between phenotypes presence/absence both spatially (across 10...
An adaptive visual system is essential for organisms inhabiting new or changing light environments. The Panama Canal exhibits such variable environments due to its anthropogenic origin and current human activities. Within the Canal, Lake Gatun harbours several exotic fish species including invasive peacock bass (Cichla monoculus, Agassiz, 1831), a predatory Amazonian cichlid. In this research, through spectral measurements molecular physiological experiments, we studied of C. monoculus...
Divergent natural selection should lead to adaptive radiation-that is, the rapid evolution of phenotypic and ecological diversity originating from a single clade. The drivers radiation have often been conceptualized through concept "adaptive landscapes," yet formal empirical estimates landscapes for radiations proven elusive. Here, we use 17-year dataset Darwin's ground finches (Geospiza spp.) at an intensively studied site on Santa Cruz (Galápagos) estimate individual apparent lifespan in...
Biological invasions are expected to alter food web structure, but there limited empirical data directly comparing invaded versus uninvaded webs, particularly in species-rich, tropical systems. We characterize for the first time of Lake Gatun-a diverse and highly freshwater lake within Panama Canal. used stable isotope analysis reconstruct trophic structure fish community Gatun compare it that a minimally reference lake, Bayano. found significant differences between structures these two...
Summary Introduced species can have profound direct ecological impacts on native species, yet their potential indirect effects remain relatively unexplored. For instance, introduced predators may directly affect some via predation, which in turn consequences for other that are released from competition. We explore this possibility East Africa's Lake Victoria basin, where the introduction of predatory Nile perch, Lates niloticus , 1950s and 60s contributed to overall or local extinction...
Human activities are dramatically altering ecosystems worldwide, often resulting in shifts selection regimes. In response, natural populations sometimes undergo rapid phenotypic changes, which, if adaptive, can increase their probability of persistence. However, many instances, fail to any change, which might indicate a variety possibilities, including maladaptation. freshwater ecosystems, the impoundment rivers and introduction exotic species among leading threats native fishes. We examined...
Disruptive natural selection within populations exploiting different resources is considered to be a major driver of adaptive radiation and the production biodiversity. Fitness functions, which describe relationships between trait variation fitness, can help illuminate how this disruptive leads population differentiation. However, single fitness function represents only particular regime over specified time period (often season or year), therefore might not capture longer-term dynamics....
Human activities, such as species introductions, are dramatically and rapidly altering natural ecological processes often result in novel selection regimes. To date, we still have a limited understanding of the extent to which anthropogenic may be driving contemporary phenotypic change populations. Here, test whether introduction piscivorous Nile perch, Lates niloticus, into East Africa's Lake Victoria nearby lakes coincided with morphological one resilient native prey species, cyprinid fish...
Colour polymorphism is a recurrent feature of natural populations, and its maintenance has been studied in range taxa their native ranges. However, less known about whether (and how) colour maintained when populations are removed from environments, as the case introduced species. We here address this issue by analyzing variation patterns recently-discovered guppy (Poecilia reticulata) Panama. Specifically, we use classic analysis to estimate number relative area different spots across low...
Phenotypes reflect a complex interplay between the direct and indirect effects of multiple selective pressures; adaptive responses in individual traits may therefore be constrained by architectonic considerations correlations with other traits. We explored whether how three suites neighbouring structures (respiratory, trophic cranial) have changed over time Rastrineobola argentea, small pelagic cyprinid fish that is endemic to Lake Victoria Basin East Africa. compared museum specimens from...
Galapagos Mockingbirds (Mimus parvulus) are opportunistic feeders that have been observed engaging in a variety of unusual predatory behaviors. Here, we report on specific behavior observed: Mockingbird preying an invasive mammal by repeatedly hitting it the ground. We discuss reasons mockingbird might engaged this and potential implications could for native biodiversity conservation Islands.
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