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The species composition and patterns of distribution of echinoderms from the upper sublittoral zone to depth of 30 m in the
southern and middle of Kola Bay in the Barents Sea were studied. In total, five species of starfishes, four species of brittle
stars, three species of sea urchins and one species of holothurians were recorded. From the beginning of 20th century, under
the impact of climate change and anthropogenic effect, the number of echinoderm species in the surveyed area decreased by
two times, and the fauna has a more boreal character against the background of the domination of boreal-arctic species. The
occurrence, population density and biomass of echinoderms, especially of common species, were several times less in the middle
bend of the bay than in the southern one. The causes of this phenomenon have been discussed. The quantitative data (frequency
of occurrence, number and biomass) for most of the species of echinoderms living in Kola Bay are given for the first time. 相似文献
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Harpacticoida (Crustacea: Copepoda) of the South China Sea: faunistic and biogeographical analysis 总被引:1,自引:0,他引:1
Based on original and on published databases, a compendium of the Harpacticoida of the South China Sea is presented, and the
distributional range of species is discussed. Up to now, a total of 77 harpacticoid species belonging to 57 genera and 19
families have been recorded in this region. Twenty of these species, collected in Nha-Trang Bay (Vietnam), have not hitherto
been described. The most speciose families are the Miraciidae (20 species) and the Laophontidae (9 species). Thirteen families
were represented by one to three species only and six families by four to seven species. A brief comparison is presented between
the harpacticoid fauna of the South China Sea, the Philippine Islands, the inner Malayan Archipelago (Java, Flores, Banda,
and Celebes Seas), New Guinea, the Yellow Sea, and the Andaman and Nicobar Islands. The overall similarity between the species
lists of these areas was observed to be extremely low (average value of Simpson index is 0.15 ± 0.08). The lists of planktonic
species from the different areas showed the highest similarity. The lowest similarity (highest endemism) was observed between
the lists of interstitial species. It is likely that one of the factors determining the differences between the faunas is
the poor knowledge about the composition and distribution of benthic harpacticoids in tropical latitudes. 相似文献
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S. M. Zhdanova 《Inland Water Biology》2011,4(4):425-434
The rotifer fauna has been studied in four water reservoirs in the Khanh Hoa Province, Central Vietnam. A total of 65 species
and subspecies and 22 genera representing 15 families have been found; 25 species and subspecies are identified as new to
Vietnam. Morphometric characteristics are given for Filinia camascela Myers, Brachionus donneri Brehm, and B. dichotomus reductus Koste et Shiel. The rotifer fauna of Central Vietnam and those of other countries of Southeast Asia are compared. Some of
the tropical and subtropical species recorded have been repeatedly reported from Russia. 相似文献
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Crinoid associates represent an abundant and diverse, but poorly explored, component of the hidden biodiversity of coral-reef
ecosystems. We studied data from 5 years of collecting in the Bay of Nhatrang (BN), Vietnam, to assess the diversity of crinoids
and their symbionts, to compare it with other areas of the Indo-West Pacific, and to elucidate the extent to which the observed
diversity of crinoids and their symbionts corresponds to their true diversity. In total, about 2,287 specimens of symbionts
belonging to 70 species were found on 203 specimens of crinoids belonging to 33 species. Among the crinoids, the most numerous
species were Himerometra robustipinna (36 specimens) and Cenometra bella (29 specimens), among the symbionts the polychaete Paradyte crinoidicola (c. 850 specimens) and the galatheid crustacean Allogalathea elegans (180 specimens). Species accumulation curves suggest that we have sampled most of the crinoid diversity in the BN, whereas
the diversity of their symbionts remained undersampled. Estimated species richness of crinoids was higher than previously
observed richness, and varied from 39 (estimated by bootstrap) to 46 (jackknife 2). Estimated species richness of symbionts
was higher than observed richness, and varied from 71 (bootstrap) to 93 (jackknife 2). We suggest a slight increase in the
number of crinoid species to result from more detailed studies of nocturnal species, and an increase in the number of symbiotic
species when studies of nocturnal crinoid associates and sibling species among decapods are included. Our study revealed a
rather rich crinoid fauna in the bay compared to other areas of the Indo-West Pacific, and the highest species richness of
crinoid associates known from anywhere in the World Ocean. 相似文献
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A. M. Prokofiev 《Journal of Ichthyology》2016,56(6):799-817
Gobioid fishes collected in Nha Trang and Van Phong bays (Vietnam) represented by 44 species, including 30 species continuously associated with soft bottoms in the open parts of the bays with normal marine conditions are reviewed. A new species, Navigobius khanhoa sp. n., is described. This species differs from other species of the genus in much higher number of rays in the second dorsal fin (26), smaller size of the mouth, teeth on the jaws arranged in a single row, and other characters. Four species from the genera Acentrogobius, Eviota, Favonigobius, and Gnatholepis have not been identified to the species, and, most likely, some of them are new for science. Nine species are recorded in the fauna of Vietnam for the first time: Aulopareia unicolor, Bathygobius hongkongensis, Egglestonichthys bombylios, Glossogobius circumspectus, Oplopomops diacanthus, Oxyurichthys auchenolepis, Tomiyamichthys ex gr. russus, Tryssogobius porosus, and Valenciennea immaculata. An occurrence of Glossogobius olivaceus in the fauna of Vietnam is confirmed. Three species, G. olivaceus, Oligolepis acutipennis, and Periophthalmus kalolo, are recorded in the Cai River delta for the first time. A new synonymy is established: Eviota gurjanovae (Prokofiev, 2007) = E. prasina (Klunzinger, 1871). The current state of knowledge of Gobiidae fauna of Vietnam is discussed, and the updating of the species composition of Gobiodontini of Nha Trang Bay is presented in addition to the species list published earlier (Prokofiev, 2007). 相似文献
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L. M. Semenova 《Inland Water Biology》2014,7(1):10-14
A total of 15 species of ostracods of 7 genera and 3 families of the suborder Podocopa Sars have been recorded in rockpools of the Kandalaksha Bay in the White Sea. Among them, Potamocypris pallida Alm is a new species for the fauna of Russia. Data on species composition and the dominant complex and ecological features of ostracods which inhabit waters of rockpools are presented. 相似文献
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The Pilliga forest in northern inland New South Wales, Australia, is one of the largest surviving remnants of native forest on the western slopes of the Great Dividing Range. The Pilliga landscape is a challenging environment for molluscs, dominated by dry sclerophyll forest and with limited and largely ephemeral aquatic habitats. A field survey of the area in 2006–2012 identified a surprisingly rich and relatively intact aquatic native molluscan fauna with five species of bivalves in three families and nine species of freshwater gastropods (four families), including some rare species and range extensions. The native land snail fauna comprised 18 species (six families), including an unusually rich pupillid fauna with nine species. Some range extensions are recorded and some species are narrow-range endemics. The distributions of many aquatic and terrestrial species were correlated with geology or soil type. Introduced molluscs were predominantly found in anthropogenic habitats and include two freshwater gastropods (two families) and nine terrestrial snails and slugs (eight families). This study provides insight into the original molluscan fauna of the western slopes prior to landscape-scale agricultural development and provides a benchmark for future reference. 相似文献
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Human pressures on the environment are changing spatially and temporally, with profound implications for the planet’s biodiversity. Butterflies are important indicators for environmental change and are a suitable group to detect areas of high conservation concern and prioritize conservation efforts. To obtain data to support urgently-needed conservation measures, we surveyed the butterfly fauna in a mountainous region of northern Vietnam, using transect counts over 8 months (121 survey days) from June 2014 to April 2015. In total, we recorded >26,000 butterflies belonging to 231 species, including at least two species new to Vietnam, three red-listed and protected species listed by CITES. Most species were rare: we recorded members of 100 species ≤5 times and 52 species just once. Males dominated the sample, accounting for 81% of all observed butterflies and all members of 84 observed species. Species richness and abundance were highest in July, and there were surprisingly large changes in species composition between months. Species richness curves reached saturation, indicating that we detected most species present in the area, except for members of two families (Lycaenidae and Hesperiidae). Our results highlight the importance of thorough studies using standardized methods, capable of detecting most species in an area, over a whole season. There are urgent needs to integrate butterflies into conservation programs and use their potential as indicator species of habitat degradation and land use intensity. 相似文献
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A. M. Prokofiev 《Journal of Ichthyology》2010,50(9):718-727
For the first time, the genus Cocotropus is recorded from the South China Sea and in the Vietnam fauna. Two new species are described—C. astakhovi and C. eksae spp. n. They are compared in detail with 14 previously known species of this genus. The fauna of velvet-fishes of Vietnam
is revised. Previously noted for Vietnam Paraploactis sp. is attributed to C. astakhovi. 相似文献
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O. P. Poltarukha 《Russian Journal of Marine Biology》2011,37(2):158-162
The barnacles (Cirripedia Thoracica) collected by the Viking expedition in chemobiotic benthic communities of Arctic Ocean-Nyegga area in Norwegian Sea and Håkon Mosby Mud Volcano area in the Barents Sea are investigated. The species (Weltnerium nymphocola in Håkon Mosby Mud Volcano area and Hamatoscalpellum hamatum in Nyegga area) that were found are common inhabitants of the Barents and Norwegian sea benthic communities. The absence of obligatory barnacle fauna that was revealed in investigated chemobiotic benthic communities of the Arctic Ocean shows they are similar to corresponding communities of the Atlantic Ocean, while the specific obligatory barnacle fauna is noted for chemobiotic benthic communities of the Pacific and Indian oceans. 相似文献
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The sillaginid fishes of Visakhapatnam Coast, Bay of Bengal, are found to be hosts for 16 species of digeneans of which seven are adult digeneans belonging to families Opecoelidae, Zoogonidae and Hemiuridae and nine are larval digeneans representing families Bucephalidae, Heterophyidae, Cryptogonimidae, Acanthocolpidae, Hemiuridae and Didymozoidae. The digenean fauna of sillaginid fishes from shallow coastal waters (< 10 m depth) and deeper offshore waters (30–50 m depth) are compared and results are discussed in the light of existing information on the migratory movements of different species of sillaginids and their occurrence in coastal or offshore waters. The usefulness of metacercariae of these fishes as 'biological tags' is considered. 相似文献
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A review of the fauna of trematodes from the family Dicrocoeliidae parasitizing animals in Vietnam has been conducted. According to original and literature data, 57 trematode species from 15 genera were recorded. Data on hosts, localization, and distribution of all these species in the territory of Vietnam are given. 相似文献