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Article Reference Estimates of life-history and growth parameters of exploited fish species in lakes Edward and George: Implications on exploitation status, population dynamics, management, and conservation of native species
Located in Library / RBINS Staff Publications 2024
Article Reference Calicnemis latreillei Laporte, 1832 (Coleoptera, Scarabaeidae, Dynastinae), a new host for the Tachinid fly Microphthalma europaea Egger, 1860
Located in Library / RBINS Staff Publications 2024
Article Reference Molecular phylogeny of Trictenotomidae (Coleoptera: Tenebrionoidea): insights into species validation and biogeography of genus Autocrates
Located in Library / RBINS Staff Publications 2023
Article Reference Colourful rivers: archaeobotanical remains of dye plants from urban fluvial deposits in the southern Low Countries (Belgium)
Although dye plants were a key element in the medieval cloth industry, their use has rarely been documented through archaeobotanical studies. This paper describes and discusses new archaeobotanical finds related to textile dyeing in the southern Low Countries, which was among the most important areas of cloth production and export in Europe during the late medieval period. Remains of weld, madder and woad, the three main medieval dye plant species, were identified via archaeobotanical analysis and high-performance liquid chromatography with photodiode array detection (HPLC-PDA). The remains were found in river deposits, dating between the 10th/12th and 15th century, from two medieval cloth-producing towns, Brussels and Mechelen. Most likely, the finds must be interpreted as waste discarded by textile dyers, which were often concentrated along the urban riverbanks. This study not only documents the use of dye plants in both cities, but also demonstrates the importance of archaeobotanical analyses of fluvial deposits for the reconstruction of artisanal activities within ancient towns. The assemblages are confronted with historic sources and mapped with other medieval remains of dye plants in the region.
Located in Library / RBINS Staff Publications 2024
Article Reference application/x-troff-ms A 3D numerical baroclinic application of the COHERENS model in the Gulf of Guinea, West Africa
In this study, we have developed a three-dimensional (3D) numerical model based on COHERENS modelling system to describe the tidal, wind-driven and thermohaline induced hydrodynamic regime in the coastal water of the Gulf of Guinea. The model is validated with respect to water levels, sea currents, temperature and salinity during 2017. Validation for astronomical tides showed that the model is able to simulate observed tidal elevation and phases for both diurnal and semi-diurnal principal constituents with a consistent level of agreement at measurement station. A statistical analysis of the results showed that the correlation coefficient and skill index between the modelled and observed tidal elevations are both above 0.96 with an average RMSE of 9 cm. The atmospheric contribution to water levels was also validated. In this case, we observe a good agreement between modelled and measured water levels with a correlation coefficient of 0.75 and an average RMSE of 1.23 cm. The validation of spatial distribution and vertical evolution of zonal current, salinity and temperature also indicated a high model accuracy for these variables. Overall, we show that our model of the Gulf of Guinea leads to highly accurate simulations, providing a basis for further fundamental and applied research studies in the area.
Located in Library / RBINS Staff Publications 2024
Article Reference Diving into Diversity: The Complex Evolutionary History and Species Richness of the ‘sawfin barbs’ from Lake Edward and Adjacent Systems
Located in Library / RBINS Staff Publications 2023
Article Reference The Genus Chaetogaster Baer, 1827 (Annelida, Clitellata) in Switzerland: A First Step toward Cataloguing Its Molecular Diversity and Description of New Species on a DNA Sequence Basis
Located in Library / RBINS Staff Publications 2024
Article Reference Otolith morphology of mesopelagic fishes collected from the Irminger Sea, North Atlantic Ocean
A large series of otoliths of 16 mesopelagic teleost fish species from the Irminger Sea, North Atlantic Ocean, are described morphologically to investigate the ontogenetic and intraspecific variation. The results show that the surface morphology of the otoliths between young and adult specimens is variable, especially in the alepocephaliform (Normichthys operosus, Sagamichthys schnakenbecki, Xenodermichthys copei) and astronesthine (Borostomias antarcticus) species. The diagnostic features of the otoliths can be used to confirm the identity of the species, especially in myctophids, where confusion between Benthosema glaciale and Myctophum punctatum may be possible. A SEM-based iconography of the otoliths of all studied species is presented.
Located in Library / RBINS Staff Publications 2024
Article Reference Hematodinium perezi (Dinophyceae: Syndiniales) in Morocco: The First Record on the African Atlantic Coast and the First Country Record of a Parasite of the Invasive Non-Native Blue Crab Callinectes sapidus
Dinoflagellates belonging to the genus Hematodinium are key parasites of marine crustaceans, primarily decapods. In this study, we document the first report of H. perezi Chatton & Poisson, 1930 on the African Atlantic coast. This is also the first parasite record in the invasive non-native Atlantic blue crab Callinectes sapidus Rathbun, 1896 in Morocco. Specimens of C. sapidus were sampled in winter 2023 from two Ramsar sites on the Moroccan Atlantic, namely Merja Zerga and Oualidia Lagoons, and were screened to detect the presence of parasites in their hemolymph. Based on staining fresh hemolymph smears, we did not detect Hematodinium in any of the 36 investigated individuals (20 and 16 from Merja Zerga and Oualidia Lagoons, respectively), probably due to methodological artifacts. The PCR-based method was revealed to be more accurate in diagnosing the Hematodinium parasite. It showed that at Merja Zerga Lagoon, 13 individuals of C. sapidus were infected by the parasite (prevalence: 65%) in comparison to four at Oualidia Lagoon (25%). Genetic analysis, based on the ITS1 rDNA gene from Hematodinium, confirmed the sequences as being those of Hematodinium perezi.
Located in Library / RBINS Staff Publications 2024
Article Reference Local factors drive the richness, biomass and composition of benthic invertebrate communities in Neotropical reservoirs
Dams affect aquatic biota in running water by altering the environmental dynamics. One of the communities affected are benthic invertebrates, that perform important functions such as nutrient cycling and energy transfer in reservoirs. We investigated the influence of the following factors: spatial, abiotic variables, reservoir characteristics and land use on the richness, biomass and composition of benthic invertebrates in 29 reservoirs in southern Brazil. Sediment samples and abiotic variables were collected in the littoral and profundal zones of reservoirs during the dry (July) and rainy (November) seasons in 2001. We used principal coordinates of neighbour matrices to obtain the spatial factors. We analysed the unique and overall effects of the four factors. We found that the factors analysed significantly influenced the composition and biomass of the invertebrates (22%). The percentage of variation explained by the unique effects of the different factors showed similar values, but the spatial factors showed the highest value (4%). This indicates that closer reservoirs have higher similarities in terms of composition and biomass of benthic invertebrates. On the other hand, the abiotic variables had the highest explained value when evaluating the overall effects (10%). Therefore, for invertebrate richness, only the reservoir characteristics were significant for the overall and unique effects (49%). More specifically, we observed lower taxon richness in older reservoirs, probably because the age of such artificial aquatic ecosystems influences other variables, which structure the benthic communities. In conclusion, the structure of benthic invertebrate communities in reservoirs of southern Brazil are mainly driven by spatial and reservoir characteristics.
Located in Library / RBINS Staff Publications 2024