Estimation of the exploitable biomass and the reference biological point, F0.1, of bogue Boops boops L., in the bay of Bou-Ismail, centre Algerian
Journal Title: Journal of Biodiversity and Environmental Sciences (JBES) - Year 2014, Vol 5, Issue 2
Abstract
A study of age and growth of Mediterranean bogue ; Boops boops (Linneaus, 1758) from Algerian Mediterranean bay of Bou-Ismail was carried out during the period from Februaries 2013 to January 2014. Five age groups could be separated by Bhattacharya’s method from length frequency data. Mean length by the end of each year of life (cm) of B. boops from the study area were found to be 13.87, 17.13, 21.49, 24.78, and 27.44 cm for age groups from I to V respectively. The estimated von Bertalanffy growth parameters were L∞= 29.66 cm, K= 0.33 year-1 and t0= 0, W∞=209.79 g .The length-weight relationship was W = 0.016 L2.798. Total mortality (Z), natural mortality (M) and fishing mortality (F) were 1.02, 0.36 and 0.66 year-1 respectively the. VIT software (Lleonart and Salat, 2000) was used to determine biomass, virtual population analysis (VPA), and yield or productivity per recruit. The exploitable biomass of the bogue was estimated at 278.87 tons by the V.P.A. The yield per actual recruit (Y/R = 24.864 g) is very close to the MSY or Ymax /R (25.092 g). This result indicates that the bogue stock is in a state of full exploitation. The biomass per actual recruit (B/R = 55.863 g), which refers to the mean annual biomass of survivors as a function of fishing mortality, is higher than the maximum sustainable biomass (Bmax /R = 48.606 g). Given the state of full exploitation of the bogue stock, an adjustment of the ratio Yactual /R is recommended. To do this, fishing effort is set at F0.1, and the values obtained for Y0.1/R and B0.1/R then correspond to 22.799 g and 80.18 g, respectively.
Authors and Affiliations
Benina Rachid, Salim Mouffok, Zitouni Boutiba
Keywords
Related Articles
- EP ID EP37886
- DOI -
- Views 124
- Downloads 0
Allelic variation of glutenin and gliadin genes in Iranian Einkorn wheat
The glutenin and gliadin characteristics of wheat germplasm have a potential value and understanding the allelic distribution in glutenin and gliadin loci is very important for any wheat breeding program. In the present...
Characteristics and antifungal effect of composts on Fusarium oxysporum F. SP. lycopersici incitant of Fusarium wilt of tomato (Solanum lycopersicum L.)
A laboratory study was carried out to evaluate some physical and chemical properties of three composts namely; composted poultry manure (CPM), composted cow dung (CCD) and composted neem-leaf (CNL) used as soil organic...
Morphological study of adult female Aedes species from the Amravati District of Maharashtra and its role as a vector
Amravati is a major district from Vidarbha region of Maharashtra. This tropical region shows extreme cold and extreme high temperatures during winter and summer seasons. The temperature reaches beyond a level of 45oC w...
Estimating the biomass production of three rangeland species using geo-statistic techniques, Taleghan, Iran
The study area of the current study is located in Taleghan region, Iran;enclosing about 54 hectares. What is argued here, is estimating the amount of biomass production of some rangeland species by making use of geostat...
The crown effect of Persian Oak (Quercus brantii LindI.) high trees on the physical and chemical properties of soil in Iran Zagros forests (Case study: Dalab canyon, Ilam County)
Forest trees, especially ones growing in the arid and semi arid regions, have a significant impact on the soil under and outside the tree crown and function of these ecosystems. Given that the study of relation between...