Morfometrija tijela i analiza oblika otolita inćuna (Engraulis encrasicolus (Linnaeus, 1758)) u alžirskom bazenu

Body morphometric characteristics and otolith shape described by elliptic Fourier descriptors analyses were carried out on European anchovy (Engraulis encrasicolus) samples collected from six locations in Algerian waters during the acoustic survey ALPEL2018 (south-western Mediterranean Sea, GFCM-GSA04). The discriminant analysis was applied over twelve morphometric body distances and 31 normalized elliptic Fourier descriptors. It highlighted significant difference between areas but with high overlapping. No significant difference was detected between males and females, or right and left otoliths. Hierarchical clustering analysis conducted on the mean form of body and otolith shape showed a clear geographical cline. The results indicate that the geographical trend is present with a high level of overlapping between the near areas, suggesting that European anchovies in Algerian waters are not completely isolated.Morfometrijske karakteristike tijela i oblik otolita opisane eliptičkim Fourierovim deskriptorima analize su provedene na uzorcima europskog inćuna (Engraulis encrasicolus) prikupljenim sa šest lokacija u alžirskim vodama tijekom akustičkog istraživanja ALPEL2018 (jugozapadno Sredozemno more, GFCM-GSA04). Diskriminantna analiza primijenjena je na dvanaest morfometrijskih udaljenosti tijela i 31 normalizirani eliptički Fourier deskriptor. Naglašena je značajna razlika između područja, ali s velikim preklapanjem. Nije otkrivena značajna razlika između mužjaka i ženki, odnosno desnog i lijevog otolita. Provedena hijerarhijska klasterska analiza srednjeg oblika tijela i oblika otolita pokazala je jasnu geografsku klinu. Rezultati pokazuju da je geografski trend prisutan s visokom razinom preklapanja između obližnjih područja, što navodi da europski inćuni u alžirskim vodama nisu potpuno izolirani

Spatial Distribution of Norway Lobster Nephrops norvegicus (Linnaeus, 1758) Caught in Bouzedjar Bay and Associated Benthic Fauna.

Surveys were conducted in the field, near the port of Bouzedjar with fishermen, to acquire a knowledge of the spatial and depth distribution of the Norway lobster Nephrops norvegicus (Linneaus, 1758). To complete our investigations, we referred to the informations obtained during the Spanish trawling and acoustic survey which was carried out on the Algerian coast in 2004 aboard the Spanish research vessel R / V Vizconde de Eza. Analysis of the results reveals that the rich funds in norway lobster were located in the central area of the continental shelf between the immersions 250 and 400 m. It is thus observed very clearly that fish caught on these funds are mostly represented by Gadidae family; the most common species is the Greater forkbeard Phycis blennoides (B

On the fecundity of the seabream, Pagellus acarne (Risso, 1827) of the western Mediterranean Sea, Algerian coasts

The fecundity of the Seabream from the western Mediterranean (Algerian coast) was assessed by the volumetric method using 22 ovaries from females between 169 and 263 mm total length (206.62 ± 19.93). Estimates of total potential annual fecundity varied between 19875 and 49125 oocytes per female (29448.86 ± 8198.12). Relationships between total potential fecundity (F) and total length (Lt), total weight (Wt), gonad weight (Wg) were established using the multiplicative regression model and a significant correlation was found (ANOVA: P‹0.01)

The contribution of business centers of private banks in the financing of SMEs in Algeria: Case of the wilaya of Bejaia

International audienceThe renewal policy is one of the policies that companies resort to enforce after a period of starting their activity.We note that the rapid technological advancements in machine design are preparing many enterprises to improve their performance and develop production in a better and more advantageous form.And our study makes it possible to develop a rational policy for the acquisition of machines in an industrial installation

Ecology and fishery of the deep-water shrimp, Aristeus antennatus (Risso, 1816) off Algeria (south-western Mediterranean)

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