Juniper Publishers-Oceanography Open Access Journal

  Abstract Fishery products are an important part of the diet in many countries of the world, where demand increases proportionally with population growth. The greater request of seafood products refers to fish, however, the production and harvest of molluscs, especially bivalves, will also play a key role in satisfying this growing market. To meet this demand, it is necessary to have an available number of organisms, which may be the product of either fishing or aquaculture. Nevertheless, there are not enough studies about the biological and ecological characteristics of these resources that guarantee maintainable production. This makes it difficult to carry out sustainable and adequate exploitation of the natural wealth. Alternatives involve either the repopulation of natural banks or the seed production, which can be used in aquaculture farming’s for the production of bivalves until their commercial size. In either case, it is necessary to continue researching in t

  Abstract Three zones are differentiated in the marine sector of the Guadalquivir estuary (SW Spain), according to a multidisciplinary analysis (water, sediment, foraminifera). Both salinities and pH increase from the innermost areas (zone 1: Ammonia tepida) to the mouth (zone 3: Ammonia beccarii), with an intermediate zone 2 (Ammonia beccarii-Triloculina trigonula). Both density and diversity are low to very low, except near the transition between zones 2 and 3. Planktonic foraminifera decrease sea Ward from zone 1 to zone 3. Read more about this article:  https://juniperpublishers.com/ofoaj/OFOAJ.MS.ID.555759.php Read more Juniper Publishers Google Scholar articles  https://scholar.google.com/citations?view_op=view_citation&hl=en&user=V6JxtrUAAAAJ&citation_for_view=V6JxtrUAAAAJ:D_sINldO8mEC

  Abstract The ecological condition of Lake Tinishu Abaya was assessed using benthic macroinvertebrates as well. The results from this aspect of the study showed that a total of 5735 benthic macroinvertebrate specimens comprising of 23 taxa were collected from all the study sites. There was spatial effect on the number and distribution of benthic individuals (p <0.05). It was high at Dacha riverside (n=2089) followed by Bobodo riverside (n=1145), Reference site (n= 963), Badober riverside (n= 859), and Maingate side (n=679). The abundance of benthic communities significantly varied between the study seasons (p<0.05). Higher individuals were observed during the wet season (n=3583) than in the dry season (n=2152). The Hemiptera family were the predominant macroinvertebrates that contributed the largest number (n=2546) of the total samples followed by Diptera (n=878), Coleoptera (n=835, 14.56%) and Gastropoda (n=631). The Ephemeroptera (n=172), Hirudinae (n=335) an

  Abstract The common spiny lobster (Palinurus elephas, Fabricius, 1787) is an iconic species of the Mediterranean Sea. Despite the existence of data on the artisanal fishery of P. elephas in the Mediterranean Sea and particularly in Corsica, knowledge on the biology and life history traits of this iconic species is still lacking. This paper identifies the main gaps in current knowledge and suggests future directions of research to answer these fundamental questions, which are currently unanswered. Read more about this article:  https://juniperpublishers.com/ofoaj/OFOAJ.MS.ID.555827.php Read more Juniper Publishers Google Scholar articles  https://scholar.google.com/citations?view_op=view_citation&hl=en&user=V6JxtrUAAAAJ&citation_for_view=V6JxtrUAAAAJ:lSLTfruPkqcC

  Abstract Food and feeding biology of freshwater zig-zag eel Mastacembelus armatus (LACEPÈDE, 1800) was investigated from the Allahabad waters of the river Ganga from April 2015 to March 2016. The Stomach contents of 326 individuals of M. armatus were collected monthly from the Daraganj fish landing centre located on the bank of the river Ganga. The composition of food content was expressed as percentage of the frequency of occurrence (%Oi) and percentage of the volume (Vi). The main food items were estimated by Index of preponderance (Ii). The three major food items of M. armatus were the small sized teleosts, insects, and molluscs. The analyses of the relative gut length (RGL) revealed it carnivorous type of feeding habit. The Gastro-Somatic Index (GaSI) in the male and female ranged between 2.65 and 4.41 with a mean of 3.42 ± 0.09 and 2.84 and 3.43 with a mean value of 3.05 ± 0.03. The mean GaSI value differed significantly at 5% level of significance (F = 6.72, p =