Topic
Dosinia
About: Dosinia is a research topic. Over the lifetime, 27 publications have been published within this topic receiving 212 citations.
Papers
TL;DR: It is concluded that molluscivore shorebirds are able to deplete their food stocks in the course of their 'winter' in a tropical intertidal area by following the depletion trajectories predicted by the optimal diet model.
Abstract: At temperate latitudes densities and biomass of intertidal molluscs tend to be strongly seasonal. Here we provide a comparative study on seasonality of bivalves and gastropods in the tropical intertidal seagrass-covered soft sediment environment of Banc d'Arguin, Mauritania (20 degrees N, 16 degrees W). In this system, benthivorous shorebirds exert considerable predation pressure with strong seasonal variations. It has been proposed that during the period when (adult) shorebirds are absent (May-August) benthic biomass would be able to recover, but a first test was inconclusive. Over a full year (March 2011-February 2012), each month we sampled benthic invertebrates at sixteen permanent sites. The total of 3763 specimens comprised 20 species, representing eight orders and 19 families. Bivalves were much more common than gastropods. The bivalve Loripes lucinalis dominated the assemblage throughout the year (58% of total number), followed by Dosinia isocardia (10%), Senilia senilis (8%) and the gastropod Gibbula umbilicalis (6%). Average biomass amounted to 32 g AFDM/m(2), of which the large West-African bloody cockle Senilia made up three-quarter, Loripes 16%, Gibbula 2% and Dosinia 1%. Across the 20 species, lowest densities were reached in late spring (May) and summer (Aug.), whereas highest densities occurred in autumn (Oct.). The lowest overall density of 676 specimens/m(2) in August more than doubled to a peak density of 1538 specimens/m(2) in October, most of the increase being due to strong recruitment in both Loripes (densities increasing from 322 specimens/m(2) in Sept. to 785 specimens/m(2) in Oct.) and Dosinia (densities increasing from 18 specimens/m(2) in Aug. to 265 specimens/m(2) in Sept.). Our results suggest that by the time the feathered molluscivore predators returned in high numbers to Banc d'Arguin (after their summer breeding season in the Arctic), benthic animals were at a peak. In order to quantitatively understand the seasonal changes in mollusc abundance, we build upon a recently published optimal diet model in which the most abundant molluscivore shorebird, the red knot (Calidris canutus), could choose between Loripes and Dosinia. Observed changes in densities of these two bivalves closely match depletion trajectories predicted by the model. We conclude that molluscivore shorebirds are able to deplete their food stocks in the course of their 'winter' in a tropical intertidal area.
47 citations
TL;DR: The phylogenetic relationships of family Veneridae were established based on 12 concatenated protein-coding genes using maximum likelihood and Bayesian analyses, which supported that Dosininae and Meretricinae have a closer relationship, with Tapetinae being the sister taxon.
Abstract: Mitochondrial genomes have proved to be a powerful tool in resolving phylogenetic relationship. In order to understand the mitogenome characteristics and phylogenetic position of the genus Dosinia, we sequenced the complete mitochondrial genomes of Dosinia altior and Dosinia troscheli (Bivalvia: Veneridae), compared them with that of Dosinia japonica and established a phylogenetic tree for Veneridae. The mitogenomes of D. altior (17,536 bp) and D. troscheli (17,229 bp) are the two smallest in Veneridae, which include 13 protein-coding genes, 2 ribosomal RNA genes, 22 tRNA genes, and non-coding regions. The mitogenomes of the Dosinia species are similar in size, gene content, AT content, AT- and GC- skews, and gene arrangement. The phylogenetic relationships of family Veneridae were established based on 12 concatenated protein-coding genes using maximum likelihood and Bayesian analyses, which supported that Dosininae and Meretricinae have a closer relationship, with Tapetinae being the sister taxon. The information obtained in this study will contribute to further understanding of the molecular features of bivalve mitogenomes and the evolutionary history of the genus Dosinia.
19 citations
TL;DR: Evaluated the potential food sources of six commercially important bivalve species that coexist in intertidal areas of Zhuanghe Bay, northern China, finding high proportions of dinoflagellate fatty acid markers in all species supported the premise that POM was their primary food source and levels of bacterial and terrestrial organic matter fatty acids were high, indicating that bacteria and TOM can be important supplemental food sources for intert tidal bivalves.
Abstract: We evaluated the potential food sources of six commercially important bivalve species (Mactra veneriformis, Mactra chinensis, Ruditapes philippinarum, Cyclina sinensis, Dosinia laminate, and Sinonovacula constricta) that coexist in intertidal areas of Zhuanghe Bay, northern China. The δ13C values of bivalves (−19.9 to −19.0 ‰) were between those of particulate organic matter (POM) (−22.5 ‰) and sedimentary organic matter (SOM) (−14.9 ‰). Based on the isotope two-source mixing model, the relative contributions of POM and SOM to the dietary regime of intertidal bivalves were 71.6 and 29.4 %, respectively. This result is consistent with the traditional view that POM is the principal food source of bivalves. The lack of significant differences in δ13C values among species suggests that they had the same primary food source. High proportions of dinoflagellate fatty acid markers in all species supported the premise that POM was their primary food source. Levels of bacterial and terrestrial organic matter (TOM) fatty acid markers were also high in all species, indicating that bacteria and TOM can be important supplemental food sources for intertidal bivalves.
17 citations
TL;DR: Significant decreases were recorded in populations of the bivalve Solen cylindraceus and the prawns Upogebia africana and Callianassa kraussi in the middle and upper reaches of the Swartkops Estuary in September–October 1975.
Abstract: The intensity and effects of a flood in September–October 1975 on certain macrobenthic species of the soft substrata of the Swartkops Estuary were assessed. Significant decreases were recorded in populations of the bivalve Solen cylindraceus and the prawns Upogebia africana and Callianassa kraussi in the middle and upper reaches. The reductions were respectively some 93, 49 and 28 percent of the pre-flood values. No decrease was noted in populations of the bivalve Dosinia hepatica in the middle reaches or of U. africana in the lower reaches. Both large and small S. cylindraceus and C. kraussi were apparently affected by the flood, but in the case of U. africana it was primarily small individuals that suffered. Possible causes of these decreases are discussed.
16 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2020 | 1 |
| 2019 | 3 |
| 2018 | 1 |
| 2015 | 1 |
| 2014 | 1 |
| 2013 | 4 |