A5061319148- Ichthyology and Marine Biology
- Fish Biology and Ecology Studies
- Marine Ecology and Invasive Species
- Turtle Biology and Conservation
- Fish Ecology and Management Studies
- Marine and fisheries research
- Amphibian and Reptile Biology
- Marine animal studies overview
- Bird parasitology and diseases
- Identification and Quantification in Food
- Marine Biology and Ecology Research
- Parasite Biology and Host Interactions
- Rabies epidemiology and control
- Marine Bivalve and Aquaculture Studies
- Coral and Marine Ecosystems Studies
- Climate change impacts on agriculture
- Cephalopods and Marine Biology
- Aquaculture Nutrition and Growth
- Venomous Animal Envenomation and Studies
- Environmental and Social Impact Assessments
- Microplastics and Plastic Pollution
- Cassava research and cyanide
- Climate Change, Adaptation, Migration
- Wildlife Conservation and Criminology Analyses
- Marine and coastal ecosystems
Institut National des Sciences et Technologies de la Mer
2015-2025
University of Carthage
2022
National Interuniversity Consortium of Materials Science and Technology
2020
Institut de Ciències del Mar
2008
Based on an extensive sampling regime from both nesting populations and bycatch, frequency analyses of mitochondrial (mt) DNA control region haplotypes in the Mediterranean were used to assess genetic structure stock composition loggerhead sea turtle, Caretta caretta, different marine fisheries. The show following. (i) In drifting longline fisheries working pelagic habitats 53–55% turtles caught originated stock; (ii) bottom‐trawl all turtle bycatch is derived this regional (iii) This...
Global warming is affecting habitat quality and availability on our planet some species are predicted or by now changing their distribution range. Here we show that loggerhead turtles have already started to expand nesting range into the Western Mediterranean, which has until recently hosted only sporadic nests. We compiled information activity from beaches surrounding Mediterranean collected metadata turtle nests in Spain, France, Italy, Tunisia between 2010 2020 provide an exhaustive...
Heterogeneous data collection in the marine environment has led to large gaps our knowledge of species distributions. To fill these gaps, models calibrated on existing may be used predict distributions unsampled areas, given that available are sufficiently representative. Our objective was evaluate feasibility mapping cetacean densities across entire Mediterranean Sea using survey and various environmental covariates. We aggregated 302,481 km line transect effort conducted within past 20...
The Mediterranean Large Elasmobranchs Monitoring (MEDLEM) database contains over 3000 records (more than 4000 individuals) of large elasmobranch species from 20 different countries around the and Black seas, observed 1666 to 2017. main included in archive are devil fish (1 813 individuals), basking shark (939 blue (585 great white (337 individuals).In last decades other such as shortfin mako (166 spiny butterfly ray (138) thresher (174 were reported with an increasing frequency. This was...
The reproductive biology of the smooth‐hound shark Mustelus mustelus was studied in Gulf Gabès (southern Tunisia). Females were found to mature between 1075 and 1230 mm total length ( L T ) whereas males matured 880 1120 . at which 50% population reached maturity 971 1172 for females, respectively. Male gonads symmetrical terms mass both functional, females only right ovary functional. seasonal changes oocytes testes development, embryo occurrence near‐term post‐partum showed that this...
<title>Abstract</title> This study investigates the biodiversity and status of sharks in General Fisheries Commission for Mediterranean (GFCM) Geographical subareas 13, Gulf Hammamet (Tunisia). It provides insights into shark diversity, abundance, seasonal occurrence impact fisheries on their population based inspection fishery landings through 2020–2023. A total 23 species belonging to 11 families were recorded, with over 74% classified as threatened according International Union...
Specimens of Mustelus punctulatus were collected between January 2002 and December 2005 from commercial fisheries in the Gulf Gabès (central Mediterranean Sea). Males females reached a maximum total length (TL) 111 122 cm respectively. matured 76 88.5 TL, with size at maturity (TL50) 81.4 TL. Females 88 100 TL TL50 95.6 cm. had an annual reproductive cycle. Mating occurred through late-May June. Ovulation early July to mid-August parturition occurring mid-May June, after gestation period 11...
The thornback ray Raja clavata is one of the most abundant bycatch species trawl fishing in waters Gulf Gabès, but little known about its life history this area. present study provides first data on age and growth Tunisian waters, as well additional reproduction. individuals was estimated by counting bands central vertebral sections. Marginal increment edge analysis supported hypothesis annual deposition bands, with opaque band formed during autumn. parameters from von Bertalanffy Gompertz...
Longlines are a fishing gear that have traditionally been used world-wide. Surface longlines mainly to fish swordfish, albacore, tuna and some species of sharks, while bottom large bottom-dwelling such as groupers. widely known interact with several sea turtles, there is increasing concern about the impact by-catch on these species. However, paucity data turtle interactions longlines. In this paper we analyse interaction turtles both surface in zone Zarzis south gulf Gabès, which considered...
The diet of the smooth-hound shark, Mustelus mustelus, from Gulf Gabès (southern Tunisia, central Mediterranean Sea) was investigated with respect to fish size and season. Stomach contents were analyzed 540 specimens total lengths ranging 34 158.5 cm. Of number stomachs examined, 63 empty (11.67%). Smooth-hound shark fed mainly on crustaceans, fishes cephalopods. Sipunculids, polychaetes echinoderms occasional preys. No differences found between diets males females. Ontogenetic changes in M....
Elasmobranchs are an important catch component in Tunisian artisanal fisheries. Generally, species-specific information is largely unavailable for fisheries; increase knowledge thereof essential to ensure proper management of these species. The study analyzed the gillnet fishery elasmobranch catches Gulf Gabès, whereby 45 fishing trips were conducted from April June 2007 and 2008 capture a total six species: three Rajiformes Carchariniformes. Rhinobatos cemiculus was most species (52%; 4.588...
Age, growth and reproductive parameters were estimated for Raja radula from the Gulf of Gabes (southern Tunisia, central Mediterranean Sea), collected monthly during 2007 commercial fisheries. In total, 550 females (18.5–80.0 cm TL) 400 males (13.4–65 examined to study cycle. A subsample 272 specimens (140 132 males, ranging 15.5 80 in total length, was used age estimation derived vertebral centra. The marginal-increment edge analysis showed annual deposition bands. oldest female 12 years...
This study explores the status of exploited shark populations in Gulf Gabes relation to fishing pressure, based on data pertaining longline fishery, collected during two periods. Catch from 48 and 96 pelagic sets collected, respectively, 2007/2008 2016/2017, were used compare species composition catch rates between Four recorded 2007/2008, while 11 additional demersal elasmobranchs along with teleosts fished 2016/2017. Elasmobranch dominated catches 94% 99.3% terms specimens number,...
Abstract Sea turtles may migrate vast distances from their feeding areas to home rookeries where they nest. During these migrations sea are subject many threats, among which interactions with pelagic longlines. This gear is used frequently in the summer period Gulf of Gabes targeting mainly sandbar shark ( Carcharhinus plumbeus ). Hooks baited mackerel Scomber scombrus ) or pieces stingray Dasyatis pastinaca Twenty‐one fishing trips (48 sets a total 35 950 hooks deployed) were conducted...
Two species of spurdog the genus Squalus occur in Gulf Gabès (southern Tunisia, central Mediterranean): longnose blainvillei (Risso, 1827) and a short-snout megalops-cubensis group. Morphometric meristic data as well genetic analyses (DNA inter-simple sequence repeat markers molecular barcoding methods) support assignation this to megalops (Macleay, 1881). occurs commonly temperate tropical Australian waters, is also thought eastern Atlantic, southern Indian Ocean western North Pacific...
Abstract Age and growth of the brown ray, Raja miraletus, was estimated from ring counts on vertebral sections 95 females (13.5–56.0 cm total length (TL)) 85 males (13.5–58.0 TL) collected Gulf Gabès (Central Mediterranean, Tunisia) during 2007. Marginal increment edge analyses suggest annual band pair formation. The oldest female male rays were 9 7 years old, respectively. Von Bertalanffy parameters are L8 = 69.20 TL, k=0.18 year–1 t 0=–0.11 for females, 67 k=0.22 0=–1.01 males. Longevity...
Small-scale fisheries are generally promoted as a sustainable alternative to large-scale industrial fisheries. However, there is recent growing evidence that small-scale may be the largest threat marine species of conservation concern. The objective this study was evaluate potential impact trammel net fishery on elasmobranchs in Gulf Gabès, Southern Tunisia. Data based 191 shrimp set (40 mm stretched mesh size) surveys conducted aboard commercial fishing vessels from May July 2009. Five...