Mohammed Znari

Mohammed Znari
Cadi Ayyad University | UCAM · Department of Biology

PhD, Moroccan Doctorat d'Etat

About

122
Publications
23,128
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808
Citations
Citations since 2017
38 Research Items
360 Citations
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20172018201920202021202220230204060
20172018201920202021202220230204060
20172018201920202021202220230204060

Publications

Publications (122)
Article
Full-text available
The variation of morphometric and meristic characters among three fishing areas of sardine was addressed considering the 300 specimens from the Moroccan Atlantic coast, during the period from March 2017 to February 2018. The meristic count (Six characters) and morphometric character (fifteen characters) of each specimen were studied. The total leng...
Article
Full-text available
Reproductive strategy in European hake, Merluccius merluccius (Linnaeus, 1758) from the Safi fishing area was investigated between January 2019 to December 2019. The sex ratio (♀/♂) was in favor of males (1:1.74). Of a total of 1152 specimens sampled, 589 were males (51%), 333 females (29%), and 230 immature (20%). The immature ones were represente...
Article
Full-text available
The Atlantic horse mackerel Trachurus trachurus, the family Carangidae, is a small pelagic with high commercial importance. This species is classified as globally vulnerable (IUCN) due to fishing pressure and low recruitment. It has drastically declined during the last three decades. In contrast, to the well-studied Euro-Mediterranean stocks, the p...
Article
Full-text available
The Barbary macaque Macaca sylvanus currently survives in small fragmented isolates in Morocco and Algeria. Between 65 and 75 % of the world’s population occurred in the central zone of the Moroccan Middle Atlas. In Morocco, the species survives today in the Rif, the Middle Atlas and the High Atlas mountains. In Algeria it occurs in three areas: Ch...
Article
The Atlantic horse mackerel Trachurus trachurus, the family Carangidae, is a small pelagic with high commercial importance. This species is classified as globally vulnerable (IUCN) due to fishing pressure and low recruitment. It has drastically declined during the last three decades. In contrast, to the well-studied Euro-Mediterranean stocks, the p...
Article
ABSTRACT To discriminate potential stock units of the Atlantic horse mackerel Trachurus trachurus within the putative Moroccan–Saharan stock, we investigated the morphological variation of this species from three fishing areas (from the north to the south: Larache, Safi and Dakhla) in the Moroccan Atlantic coastal waters. We used a geometric morpho...
Article
This article summarizes the state of stocks of sardine, sardina pilchardus in Moroccan waters at the end of 2016 and 2018. These stocks varies according to the region,They are now in a sustainable exploitation situation:Atlantic sardine, but also stocks that have reached or are still in over-exploitation levels: Mediterranean sardine. The fi shing...
Article
Animals inhabiting arid environments use a variety of behavioural and physiological strategies to balance their water and salt budgets. We studied the effects of dehydration and salt loading on osmoregulatory capacities in a large herbivorous desert lizard, the Moroccan Spiny-tailed lizard Uromastyx nigriventris , the family Agamidae. These lizards...
Article
Full-text available
To discriminate potential stock units of the Atlantic horse mackerel Trachurus trachurus within the putative Moroccan–Saharan stock, we investigated the morphological variation of this species from three fishing areas (from the north to the south: Larache, Safi and Dakhla) in the Moroccan Atlantic coastal waters. We used a geometric morphometric ap...
Article
Full-text available
The endangered Moorish tortoise Testudo graeca is the unique terrestrial chelonian species in North-west Africa. In west-central Morocco, the endemic subspecies, the Souss valley tortoise T. g. soussensis, occupies semi-arid to arid low-quality habitats, and is subject to serious threats. A long-term mark-recapture programme from 2001 to 2012 allow...
Article
Full-text available
The single remnant Moroccan dorcas gazelle (Gazella dorcas massaesyla) has been isolated for more than five decades in the M'Sabih Talaa reserve, an arid area of west-central Morocco. This population has been subject to different disturbances, especially poaching and depredation by feral dogs. A five-season line transect survey revealed that the po...
Article
The marginal populations of the Sahara blue-eyed pond turtle, Mauremys leprosa saharica (Testudines: Geoemydidae) in the pre-Saharan area in the Lower Draa Valley, are faced to extreme environmental conditions of arid climate and anthropogenic activities including overuse of water and land salinization. In this study, we investigated a small isolat...
Chapter
Full-text available
The marginal populations of the Sahara Blue-eyed pond turtle, Mauremys leprosa saharica (Testudines: Geoemydidae) in the pre-Saharan area in the Lower Draa valley, are facing extreme environmental conditions of arid climate and anthropogenic activities, including overuse of water and land salinization. In this study, we investigated a small isolate...
Article
Full-text available
Birds associated with steppe and pseudosteppe habitats are one of the most threatened avian communities in Europe, given their recent decline due to agriculture intensification and land abandonment. Large-scale conversion of natural and rural areas into irrigated farmlands is ongoing in North Africa, but the effects of this habitat modification on...
Article
Atlas Barbary sheep, Ammotragus lervia lervia , are the only wild caprinid of Northwest Africa. Some studies have investigated their feeding ecology, but there is no information on intraspecific dietary variation. Therefore, we determined the spring diet and its variation between age-sex classes in Atlas Barbary sheep within a fenced nature reserve...
Article
Ecological niche modelling provides a useful tool to measure niche properties such as niche breadth, niche overlap and niche conservatism among genetic lineages, with relevant implications for conservation. The Mediterranean pond turtle Mauremys leprosa occurs on both sides of the Strait of Gibraltar over most Iberia and the Maghreb Region of north...
Article
Water is essential to human societies and a prerequisite for flourishing nature, especially in arid regions. Yet, climate change and socio-economic developments are expected to exacerbate current and future stresses on water resources, demanding innovative approaches to balance water needs for society and nature conservation. In this study, we use...
Article
Aspects of reproduction and population structure were investigated between June 2017 to May 2018 in sardines, Sardina pilchardus (Walbaum, 1792) from the Safi fishing area. The sex ratio was generally in favor of males (χ2=19.50). Out of 3252 total specimens sampled, 1404 were females (46.00%), 1648 males 50.68%) and 200 immatures (6.15%). The imma...
Article
The bulk of marine fish production in Morocco comprises small pelagic with a large predominance of the European sardine Sardina pilchardus. Information on feeding intensity and diet composition of small pelagic fish are of great importance for understanding species ecology and life-history traits and fisheries management. In the present study, we c...
Article
Full-text available
The North African population of Bonelli’s Eagle Aquila fasciata (Vieillot, 1822) is limited to the south by the northern fringe of the Sahara Desert. This study provides the first data on the spatial distribution and density of breeding Bonelli’s Eagles in south-west Morocco, at the southern limit of their breeding distribution in the Western Palea...
Article
The marginal populations of the Sahara blue-eyed pond turtle, Mauremys leprosa saharica, in the southern-most species distribution range in the pre-Saharan areas of north-west Africa, are faced with extreme environmental conditions of arid climate and anthropogenic and climate change mediated water and land salinisation. In the current study, we in...
Article
Morphometric variation can be very useful for discriminating ‘phenotypic stocks’ as groups with similar life-history traits. Such groups are of great importance for accurate population-dynamics modelling for purposes of fishery stock assessment and management, independent of their genetic differences or similarities. This study is a contribution to...
Article
Full-text available
: Identifying populations under environmental stress before this latter has detrimental effects onthem is one of the major goals in conservation biology. In this regard, the cranial fluctuating asymmetry (FA) was used to examine the levels of developmental stress in various animal and human populations. So, the present study is aimed at comparing t...
Article
Full-text available
La pollution des eaux continentales est la cause la plus importante de la dégradation des écosystèmes d'eau douce. Il en résulte des rejets d'effluents riches en matière organique fermentescible et de nombreux pathogènes qui lui sont généralement associés. C'est l'un des problèmes les plus graves auxquels est confronté la vie sur terre et l'un des...
Article
Full-text available
The sandgrouse, family Pteroclididae, are a group of birds adapted to open, arid habitats and powerful fliers but information on their plumage development and moult is scarce. In this study, the annual cycle of body plumage development, sequence and duration of primary flight feathers moult were investigated in Black-bellied Sandgrouse Pterocles or...
Article
Full-text available
The sandgrouse, family Pteroclididae, are a group of birds adapted to open, arid habitats and powerful fliers but information on their plumage development and moult is scarce. In this study, the annual cycle of body plumage development, sequence and duration of primary flight feathers moult were investigated in Black-bellied Sandgrouse Pterocles or...
Article
Full-text available
Food habits of the Moroccan Spiny-tailed lizard, Uromastyx nigriventris, from three localities along an aridity gradient from north-east (Mediterranean) to southwest (Atlantic pre-Saharan) of the Atlas range, Morocco, were investigated in spring and autumn 2015 using fecal microhistological analysis. The obtained results showed that these lizards a...
Poster
Full-text available
It can be very useful in estimating daily food consumption in crop raiding primates in order to assess the importance of crop damages. In this regard, we estimated the total energy expenditure and food consumption in a crop-raiding troop of Barbary macaques in High Ourika valley, western High Atlas, Morocco, during the fruiting season in spring-sum...
Article
Full-text available
This study presents the first data on a breeding colony of the Black-headed Gull on islets of the Al Massira reservoir in Central west Morocco from 2002 to 2008. Laying phenology, nesting site selection, clutch size, egg size and breeding success were investigated. These data provide new information at the southwestern limit of the species’ breedin...
Article
In the present study, a histological and morphometric investigation of testes in yearling male Black-bellied Sandgrouse Pterocles orientalis was performed during the reproductive period. The trial was conducted on four randomly selected yearling male birds that originated from eggs collected in the wild and artificially incubated. Upon sacrifice, t...
Article
Full-text available
The Barbary macaque Macaca sylvanus is imperiled throughout its distribution range in north-west Africa. In the summers of 2009 and 2013 we used the piecewise line-transect distance sampling method to study the southernmost population in the High Ourika valley, in the western High Atlas of Morocco. This rugged mountainous area is dominated by degra...
Conference Paper
Aquatic vertebrate biodiversity in the Draa basin, southeastern Morocco: impacts of water use and climate change Loulida Soumia, Cadi Ayyad University (presenting author) Naimi Mohamed, Cadi Ayyad University Znari Mohammed, Cadi Ayyad University Bendami Safaa, Cadi Ayyad University Moumane Adil, Cadi Ayyad University Bouazza Abdellah, Cadi Ayyad Un...
Conference Paper
Animals inhabiting arid environments use a variety of behavioural and physiological strategies to balance water and salt budgets. We studied the effects of dehydration and salt loading on osmoregulatory capacities in a large herbivorous desert lizard, the Moroccan Spiny-tailed lizard Uromastyx nigriventris. These lizards select plants with a high K...
Article
Full-text available
Quaternary climatic oscillations and geographic barriers have strongly influenced the distribution and diversification of thermophilic species occurring in the Mediterranean Basin. The Western Mediterranean pond turtle, Mauremys leprosa, is widely distributed throughout the Iberian Peninsula, southern France and most of the Maghreb region, with two...
Conference Paper
Résumé La vallée du Draa, sud-est du Maroc, compte parmi les 10 plus importants basins versants des zones arides au Monde. Cette vallée, caractérisée par une riche diversité culturelle, abrite près d’un million habitants dépendants de cette oasis désertique et fragile. Cette dernière est très menacée par l’impact humain et les changements climatiqu...
Conference Paper
Peripheral populations of the Sahara desert Blue-eyed Pond Turtle, Mauremys leprosa saharica, in southern Morocco, are faced to aridity and anthropogenic and climate change mediated water and land salinisation. We investigated structure and morphometric characteristics and tolerance to salinity and dehydration of an isolated population of the Bl...
Article
Full-text available
As a result of convergent evolution, sandgrouse share similarities with some other precocial landbirds, namely Galliformes and precocial waders (Charadriiformes). They are birds of arid lands and hence their chicks face problems of predation risk and shortage of food and water, exacerbated by the patchy and unpredictable distribution of these resou...
Article
Full-text available
L’ibis chauve (Geronticus eremita) est une espèce d’oiseau en danger critique d’extinction, du fait des ses faibles effectifs et de son aire de répartition réduite. Aujourd’hui, la dernière population sauvage reproductrice au monde occupe la bande littorale atlantique du sud-ouest marocain, au niveau du Parc national Souss-Massa (PNSM). Depuis 1991...
Article
Clutch, egg and hatchling characteristics in the Souss Valley tortoises Testudo graeca soussensis (Testudinidae) from an arid steppe area of west-central Morocco were investigated in semi captivity in spring–early summer 2011. Mating activity occurs twice in the year, mainly in early spring and for a short period in mid-autumn. The egg laying perio...
Data
Maintaining normal behavioural patterns is an important component of captive breeding with the aim of reintroduction. We examined the behaviours and daily time budgets in captivity of hand-raised black-bellied sandgrouse Pterocles orientalis provided with food and water ad libitum, and compared them with published observations of wild birds in orde...
Data
Analysis of pellets from a colony of Gull-billed Terns, Gelochelidon nilotica, nesting in Sebkha Zima, West-central Morocco, revealed a reduced food spectrum in this species. Its diet is predominantly made of preys from areas around the nesting site. Terrestrial invertebrates ; Orthoptera (Acrididae), Coleoptera (Scarabeidae and Lucanidae), Scorpio...
Article
Full-text available
The Barbary partridge, the family Phasianidae, is the main game bird in Morocco and which was reported to be heavier and larger in mountains than in lowlands. In this regard, the purpose of the present study was to investigate posthatching growth of body weight and seven morphometric parameters in Barbary partridges Alectoris barbara originated fro...
Article
Full-text available
Because survival in captivity is a significant determinant of birds available for release and reinforcement of wild populations, we aimed to identify sources of variation in mortality to assess potential impacts of management on chick productivity. We analyzed characteristics of Black‐bellied Sandgrouse eggs collected from the wild and produced by...
Article
Full-text available
The formerly widespread but now Vulnerable dorcas gazelle Gazella dorcas has declined markedly during the last 2 decades. The semi-captive population in M'Sabih Talaa Reserve, west-central Morocco, is genetically distinct and may be the last remnant of the Moroccan dorcas gazelle G. dorcas massaesyla. The last estimate of the size of this populatio...
Article
Full-text available
Delimitation of species is an important and controversial area within evolutionary biology. Many species boundaries have been defined using morphological data. New genetic approaches now offer more objective evaluation and assessment of the reliability of morphological variation as an indicator that speciation has occurred. We examined geographic v...
Article
Full-text available
Food habits of the Moroccan dorcas gazelle, Gazella dorcas massaesyla, previously investigated in the 1980s using microhistological fecal analysis, in the M'Sabih Talaa Reserve, west central Morocco, were re-evaluated over three seasons (spring, summer and autumn 2009) using the trnL approach to determine the diet composition and its seasonal varia...
Data
Plant taxa identified in the Moroccan dorcas gazelle’s diet in the M’Sabih Talaa reserve, Morocco. Data are based on sequence variation of the P6 loop of the chloroplast trnL (UAA) intron using feces as a source of DNA. %OF: occurrence frequency in %. (XLS)
Article
We studied the reproductive ecology of female Sonora mud turtles ( Kinosternon sonoriense ) at Montezuma Well, a chemically-challenging natural wetland in central Arizona, USA. Females matured between 115.5 and 125 mm carapace length (CL) and 36-54% produced eggs each year. Eggs were detected in X-radiographs from 23 April-28 September (2007-2008)...
Article
Full-text available
Despite being one of the most charismatic elements of the Mediterranean Basin fauna and its threatened status, the western Mediterranean range of Testudo graeca is at present very poorly known. The present work provides the most detailed geographical and ecological description for the North African clade of T. graeca so far. We gathered 283 occurre...