A5065995647- Marine and fisheries research
- Aquatic Ecosystems and Biodiversity
- Coral and Marine Ecosystems Studies
- Marine Bivalve and Aquaculture Studies
- Fish Biology and Ecology Studies
- Fish Ecology and Management Studies
- Coastal and Marine Management
- Cephalopods and Marine Biology
- International Maritime Law Issues
- Marine and coastal ecosystems
- Chemical synthesis and alkaloids
- Aquaculture Nutrition and Growth
- Wildlife Ecology and Conservation
- Veterinary Pharmacology and Anesthesia
- Marine and coastal plant biology
- Amphibian and Reptile Biology
- Identification and Quantification in Food
- Isotope Analysis in Ecology
- Fish biology, ecology, and behavior
- Transboundary Water Resource Management
- Aquatic Ecosystems and Phytoplankton Dynamics
- African Studies and Ethnography
- Marine and Offshore Engineering Studies
- Aquatic Invertebrate Ecology and Behavior
- African Botany and Ecology Studies
Cheikh Anta Diop University
2018-2025
Institut Sénégalais de Recherches Agricoles
2013-2025
Institut Mauritanien de Recherches Océanographiques et des Pêches
2015-2023
Centre de Suivi Ecologique
2019
Ziguinchor University
2018
Université Gaston Berger
2018
Center for Marine and Oceanographic Research
2017
Scottish Association For Marine Science
2015
International Shariʽah Research Academy for Islamic Finance
2013
Institut de Recherche pour le Développement
2009-2011
Dryland restoration is a challenging task due to the intrinsic low resilience and vulnerability land degradation of these ecosystems. Restoring vegetation communities often first step reinstating ecosystem health; however, resorting activities such as tree planting increasingly called into question, it may lead abrupt habitat changes, with unpredictable effects on faunal communities. The African Great Green Wall (GGW) large‐scale initiative whose ultimate goal improving local GGW...
Abstract The objective of this study was to assess the effect environmental variations on abundance Sardinella aurita and maderensis in Senegalese waters upwelling system. Monthly data indicating sardinella were first estimated from commercial statistics, using Generalized Linear Model 1966 2011. Abundance indices (AIs) then compared with indices, at local scale, a Coastal Upwelling Index (CUI) coastal Sea Surface Temperature (SST) index, large North Atlantic Oscillation (NAO), Multidecadal...
Small pelagic fish (SPF) species are heavily exploited in eastern boundary upwelling systems (EBUS) as their transformation products increasingly used the world's food chain. Management relies on regular monitoring, but there is a lack of robust theories for emergence populations' traits and evolution highly variable environments. This work aims to address existing knowledge gaps by combining physical biogeochemical modelling with an individual life-cycle based model applied round sardinella...
Abstract We investigate Sardinella aurita and maderensis recruitment success relative to the variability of oceanographic conditions in Senegalese waters using generalized additive models ( GAM ). Results show that both species is marked by a strong intra‐annual (seasonal) variation with minimum maximum winter summer, respectively. Their interannual variations are synchronous until 2006 (recruitment decreasing), while from 2007 there no synchrony. The model developed shows sardinella closely...
The stock of the Senegalese flat sardinella, Sardinella maderensis, is highly exploited in Senegal, West Africa. Its growth and reproduction parameters are key biological indicators for improving fisheries management. This study reviewed these using landing data from small-scale Senegal literature information dated back more than 25 years. Age was estimated length-frequency to calculate assess performance index. With global climate change there has been an increase average sea surface...
Senegalese and Mauritanian fisheries exploit the same species of white grouper but have different exploitation histories. In Senegal, has been fished for a very long time (since 1970s), whereas it is relatively recent in Mauritania. addition, small-scale fishermen this Gambia. Nevertheless, mainly practical reasons, all attempts to assess status stock have, until recently, conducted at national level except by FAO CECAF North working group who assumed be single three countries. However,...
An integrated analytical approach is proposed for monitoring and assess the ecological status of coastal marine ecosystems in West Africa subject to strong anthropogenic pressures. This based on a certain number conceptual foundations, i.e. guiding principles resulting from methodological constraints identified discussed previous study (Jouffre et al. 2023 - WP4 PESCAO-DEMERSTEM project) which will be recalled here. These foundations are dictated above all by major operational objective :...
This study investigated variations of landings two key species, Sardinella aurita and maderensis, in Senegalese waters over a ten-year period (2004–2013). Using generalized additive models, it was found that fishing gear played major role explaining differences monthly for both species (51–71% deviance explained). Its effect more significant the southern part Senegal. Fishing effort (number trips) accounted only 4–18% variability landings. Purse seine (PS) most important contributor to...
Short-lived species are extremely dependent on the seasonal and interannual variability of environmental conditions, determining their stock status is often difficult. This study investigates effects fishing pressure octopus Octopus vulgaris in Senegalese waters over a 10-year period from 1996 to 2005. Monthly catches-at-age were estimated based catch-at-weight data polymodal decomposition constrained by given growth curve. recruitments mortalities then using catch-at-age analysis performed...
For the first time in Senegal, assessments based on both stochastic and deterministic production models were used to draw a global diagnosis of fishing impact coastal demersal stocks. Based one national fisheries databases scientific trawl surveys data: (i) trends landings since 1971 examined, (ii) abundance indices 10 stocks estimated using linear fitted data commercial catch per unit efforts, (iii) stock carried out pseudo-equilibrium Fox Pella-Tomlinson Biomass dynamic model Bayesian...
This work investigates the effects of changes in both fishing pressure and environment on trophic dynamics, abundance diversity species artisanal commercial fisheries off northern coast Senegal. Using data (provided by Centre for Oceanographic Research Dakar-Thiaroye [CRODT] Senegal), we identify catch per unit effort, mean level, biomass spectrum between two periods (1990–1999 2000–2009). Decreases high level indices 1990 2009 were observed catches. These decreases then related to pressure,...
In Senegal, a significant decrease in catches indicates that many demersal fish stocks are being overexploited. The white grouper Epinephelus aeneus, locally known as the 'thiof', is exploited by both small-scale and industrial fisheries. A 28-year database of E. aeneus along Senegalese coast provided Centre for Oceanographic Research Dakar-Thiaroye, size at maturity measured Dakar (Senegal) from monthly samples 2010, were used to analyse changes population structure area over past 37 years....
Ethmalosa fimbriata is a very abundant species in marine and estuarine waters of Senegal. It caught only by artisanal fisheries. Some aspects its reproduction are studied order to provide some contribution rational sustainable management the fishery. To evaluate , sex ratio, size at first maturity, evolution sexual maturity stages gonadosomatic index (GSI) were used. The results show that ratio 46% males 54% females estuary while sea it 42% against 58% females. Size 16.2 cm for 17.5 these...
The Bonga ( Ethmalosa fimbriata ) is the third most abundant clupeid in Senegal after round and flat sardines. This study allowed updating some growth parameters of witch can contribute to management fishery. size frequency distribution showed that bonga whose range from 19 cm 21 are more common landings estuary. At sea fisheries generally target individuals average 18 22 with dominance class 20 cm. condition factor shows diet best during hot season also estuary at sea. estimating marine...
Seasonal variability of sea surface temperature
A fisheries management plan was required in Central Africa, which integrated a reduced regional hydrographical network and limited amounts of data the overall regime.The current knowledge on fish populations impacts are very poor this region, particularly Chad.Therefore, any new knowledge, especially structure ichthyological stands can be considered as valuable.Information status Lake Iro resources thus established by study, serve model regime Africa.We performed assessment Iro, Chad,...
In this study, a total of 1068 specimens Sardinella aurita which 553 females and 515 males were examined. The objectif study was to determine the reproductive parameters aurita. sex ratio significantly in favor (55%). size at first sexual maturity estimated 18.9 cm for 18.0 males. monthly variation stages gonado-somatic index (GSI) allowed locate reproduction periods from February June September December. mean absolute fecundity 110.794 ± 7582 oocytes whereas relative about 422 26 per gram female.