A5001112354- Fish Ecology and Management Studies
- Marine and fisheries research
- Marine animal studies overview
- Physiological and biochemical adaptations
- Coral and Marine Ecosystems Studies
- Ichthyology and Marine Biology
- Animal Behavior and Reproduction
- Fish Biology and Ecology Studies
- Fish biology, ecology, and behavior
- Marine Bivalve and Aquaculture Studies
- Coastal and Marine Management
- Wildlife Ecology and Conservation
- Aquaculture Nutrition and Growth
- Environmental Education and Sustainability
- Identification and Quantification in Food
- Ecology and Vegetation Dynamics Studies
- Ocean Acidification Effects and Responses
- Genetic diversity and population structure
- Animal Vocal Communication and Behavior
- Plant Diversity and Evolution
- Plant and animal studies
- Environmental and Social Impact Assessments
- Environmental Sustainability in Business
- Ecology and biodiversity studies
- Reproductive biology and impacts on aquatic species
Rhodes University
2009-2024
University of Algarve
2020-2024
Centro de Ciências do Mar do Algarve
2024
University of the Witwatersrand
1995
Abstract This paper interrogates the concept of transdisciplinarity, both theoretically and practically, from a perspective early career researchers (ECRs) in transformative ocean governance research. Aiming to advance research methodologies for future complex sustainability challenges, seeks illuminate some common uncertainties challenges surrounding transdisciplinarity marine science perspective. Following literature review on transdisciplinary research, workshops, series surveys, we...
Abstract Information on population structure and connectivity of targeted species is key for proper implementation spatial conservation measures. We used a combination genomics, biophysical modelling, biotelemetry to infer the Atlantic meagre, an important fisheries resource throughout its distribution. Genetic samples from previously identified spawning locations (Gironde, Tejo, Guadalquivir, Banc d’Arguin) two additional regions (Algarve Senegal) were analysed using genome-wide...
The meagre, Argyrosomus regius, is a large coastal predatory fish inhabiting waters from the north-eastern Atlantic and Mediterranean Sea, where it targeted by commercial recreational fisheries. Previous genetic studies have found an unexpectedly high population differentiation not only between Mediterranean, but also along coast. However, reasons underpinning this barrier remained unclear. Likewise, even though species amongst world's largest marine teleosts, knowledge about its movement...
In his landmark work on the pollination biology of South African plants in 1954, Stefan Vogel described deposition Habenaria epipactidea (= H. polyphylla ) pollinaria forelegs hawkmoth Hippotion celerio . The discovery a large, well-pollinated population Eastern Cape allowed us to confirm presence this unusual pollen placement number species shorter-tongued hawkmoths. long-tongued Agrius convolvuli is likely function as nectar thief length tongue relative spur ensures that are unlikely come...
Marine protected areas (MPAs) are a crucial tool in safeguarding marine biodiversity. However, elasmobranchs often not the primary protection target of MPAs, and their contribution to protect these species remains be better understood. In this study we examine movement patterns common stingrays Professor Luiz Saldanha park, Portuguese temperate coastal MPA. Using acoustic telemetry, tagged 31 analyzed spatial temporal distribution within MPA adjacent using long-term data set. Our findings...
Abstract Elasmobranchs are slow‐growing marine predators whose populations have declined due to their susceptibility overfishing, especially affecting species of large size. Rostroraja alba is a skate that currently classified as critically endangered. To address the effects overfishing and promote recovery habitats, protected areas (MPAs) commonly implemented management strategy. A critical aspect success using information on species' movement patterns; however, this frequently not assessed...
Quantifying how the heart rate of ectothermic organisms responds to environmental conditions (e.g. water temperature) is important information quantify their sensitivity change. Heart studies have typically been conducted in lab environments where fish are confined. However, commercially available implantable biologgers provide opportunity study free-swimming fish. Our aimed determine applicability an device, used on fusiform-shaped salmonids), for a perciform morphology and anatomy prevent...
Based on acoustic detections from a network of five stations along the south coast Portugal, 25 transits tagged meagre were identified between 2019 and 2020, mostly in summer. Comparisons with hourly current measurements moored Acoustic Doppler Profiler an High Frequency Radar system indicate that move westward favourable alongshore flows at confidence level > 90% (while eastward observations too few to be significant). Several similar different individuals occurred within two days...
Abstract The widespread adoption of acoustic telemetry has transformed our understanding marine species' behavior and movement ecology. However, accurately interpreting data, especially concerning tagging mortality, is essential for drawing valid conclusions. In this study, we scrutinized mortality in 223 individuals across 14 species evaluated the impact methodologies, including capture method size effects. Results reveal high survival rates overall, attributable to resiliency studied...
Argyrosomus regius (commonly referred to as meagre), is one of Europe's largest coastal bony fish species and supports important recreational commercial fisheries in the Atlantic Mediterranean coasts. Demand for this species, more recently their swim bladders, has led regional population declines growing importance an aquaculture species. Despite intense research captivity, little known about spatial ecology A. regius's wild population, including basic information such vertical migrations...
While acoustic telemetry (AT) has become the dominant technique for understanding patterns of fish migration, catch rate (CR) and conventional tagging (CT) techniques still play a major role, particularly in developing countries. Understanding potential biases each is important migration research. We compared these two coastal fishery species (Argyrosomus coronus Lichia amia) southern Angola. Seasonal fluctuations catchability A. led to incorrect conclusions about using CR CT we recognised...
Climate change not only drives increases in global mean ocean temperatures, but also the intensity and duration of marine heatwaves (MHWs), with potentially deleterious effects on local fishes. A first step to assess vulnerability fishes MHWs is quantify their upper thermal thresholds contrast these limits against current future temperatures during such heating events. Heart failure considered a primary mechanism governing begins occur at where heart rate fails keep pace dependency reaction...
Abstract Anthropogenic-induced climate change is having profound impacts on aquatic ecosystems, and the resilience of fish populations will be determined by their response to these impacts. The northern Namibian coast an ocean warming hotspot, with temperatures rising faster than global average. rapid in Namibia has had considerable marine fauna, such as southern extension distribution Argyrosomus coronus from Angola into waters, where it now overlaps hybridizes closely related species, A....
The genus Diplodus presents multiple cases of taxonomic conjecture. Among these the D. cervinus complex was previously described as comprising three subspecies that are now regarded separate species: cervinus, hottentotus and omanensis. exhibits a clear break in its distribution around Benguela Current system, prompting speculation Angolan South African populations flanking this area may be isolated warrant formal distinction. This study reports first integrated genetic [mitochondrial...
Fisheries managers are increasingly promoting catch-and-release (C&R) to manage recreationally angled fish stocks. Despite this, there is a scarcity of information on the effects C&R estuarine-dependent species. Cape stumpnose Rhabdosargus holubi dominates recreational fisheries catch and provides an important source food for subsistence fishers in some temperate South African estuaries. The health survival R. exposed event was investigated by examining their physiological stress response...