Showing papers in "Molluscan Research in 2019"
TL;DR: The results indicated that the herbicides increased alanine aminotransferase (ALT) and aspartate aminolayers (AST) in the haemolymph of B. alexandrina snails and significantly decreased total protein and albumin content.
Abstract: Biomphalaria alexandrina snails have been used as bioindicators for freshwater qaulity and the effects of some herbicides such as butralin, glyphosate-isopropylammonium and pendimethalin). In the p...
20 citations
TL;DR: Seasonal variations of two biomarkers of oxidative stress, lactate dehydrogenase (LDH) and malondialdehyde (MDA) and their correlation with lipid-carbohydrate metabolism in the edible bivalve Donax trunculus showed that under stressful conditions due to anthropogenic factors, some physiological processes of D.trunculus can be affected.
Abstract: The aim of the study was to determine seasonal variations of two biomarkers of oxidative stress, lactate dehydrogenase (LDH) and malondialdehyde (MDA), and their correlation with lipid-carbohydrate...
12 citations
TL;DR: The contribution that citizen scientists can make to documenting marine biodiversity through underwater photography of targeted taxa is evaluated, revealing strong seasonal patterns for chromodorid nudibranchs, and cyclical temporal change at the assemblage level.
Abstract: There is increasing interest in participation by volunteers in data collection for marine ecosystems. Here we evaluate the contribution that citizen scientists can make to documenting marine biodiv...
11 citations
TL;DR: The diversity of bivalves was studied in four mangrove stands in the vicinity of Nha Trang city and three natural associations, in Dâm Bay, Nha Phu Bay and Cam Ranh Bay, finding dozens of species commonly found in mangroves.
Abstract: The diversity of bivalves was studied in four mangrove stands in the vicinity of Nha Trang city: planted mangroves in Dâm Bay (Tre Island) and three natural associations, in Dâm Bay, Nha Phu Bay an...
9 citations
TL;DR: Variation among and within beaks suggests that the sea water of origin may be identifiable from trace elements in squid beaks and that further investigation may allow trace element profiles to become useful geographic indicators for both squid and their predators.
Abstract: Unmineralised squid beaks formed from α-chitin and protein are resistant to digestion in stomach acids and are thus useful in diet analysis. Using inductively coupled plasma mass spectrometry to de...
8 citations
TL;DR: The present study reports the range extension of Monetaria moneta, Neritina smithii and Pila globosa in the mangrove ecosystem of Paradeep and the occurrence of 274 species ofMangrove-associated gastropods and bivalves in India.
Abstract: The diversity of gastropods and bivalves from the mangrove ecosystem of Paradeep, east coast of India, was studied for the first time. The collected primary data and secondary data were compiled to...
7 citations
TL;DR: The taxonomy of this genus of small, litter-dwelling helicarionid snails is revised using a comparison of key morphological features and mitochondrial genes COI and 16S, and four new species are described: Sigaloeista gracilis n.
Abstract: Sigaloeista Shea & Griffiths, 2010 is a genus of small, litter-dwelling helicarionid snails that occurs in the rainforest and wet sclerophyll forest of northeastern New South Wales and southern Que...
7 citations
TL;DR: Screening tests were carried out on the action of dried powder of eight algal species against Biomphalaria alexandrina snails, where the most effective powders were from Dictyota dichotoma and Cystoseira barbata with LC50 values of 560 and 2200 ppm, respectively.
Abstract: Controlling the snail intermediate host of schistosomiasis is one of the strategies used to reduce disease incidence. In this study screening tests were carried out on the action of dried powder of...
7 citations
TL;DR: Both wild and farmed snails have high contents of oleic, linoleic, eicosapentaenoic and docosahexaenoic fatty acids and are a good source of minerals.
Abstract: The fatty acid and mineral matter compositions of the visceral mass and pedal mass of wild and farmed Cornu aspersum were compared. The relative fatty acid amounts of the visceral and pedal masses ...
7 citations
TL;DR: The likely directions of faunal flows were inferred based on affinity indices, showing that Mauritania could be the most probable source of the octopod species of the Canary Islands and the rest of the Macaronesian archipelagos.
Abstract: Two octopod species are reported from the Canary Islands (eastern Atlantic Ocean) for the first time: the deep sea four-horn octopus, Pteroctopus tetracirrhus (Delle Chiaje, 1830) and the gelatinou...
7 citations
TL;DR: It is demonstrated that the East Asian genus Aegista Albers, 1850 is the probable sister taxon of Landouria, and a mitochondrial phylogeny reveals L. omphalostoma from Yunnan as the sister lineage of all Sunda Islands species.
Abstract: By employing comparative morphology and anatomy as well as mitochondrial phylogenetics, we have identified three species of Landouria Godwin-Austen, 1918 in Timor-Leste. One of these specie...
TL;DR: Tolerance to oxygen depletion is analysed for all deep-water species collected by the TALUD survey off the Baja California Peninsula and the additional file includes shell characteristics and distributional information for each species.
Abstract: Eighteen species of deep-sea bivalves were collected below the Oxygen Minimum Zone (OMZ) core off western Mexico. This material was obtained during the research cruises XVI, XVIB (off the northwest...
TL;DR: The authors have given a standardised common name for each species – a practice that provides a valuable reference ‘handle’ for the non-molluscan expert and in this case a sizeable proportion of the species covered were only described in the last eight years, many with the aid of molecular evidence.
Abstract: In 2010 the encyclopaedic (and Whitley-Award Winning), Australian Land Snails, Volume 1: a Field Guide to the Eastern Species was published, and now, thanks to the combined efforts of the authors o...
TL;DR: It is recommended that those involved in the trade of Indonesian marine molluscs need to familiarise themselves better with current legislation and regulation, and monitoring of domestic and international trade in marine mollsuscs needs to be better coordinated and intensified and prosecutions for those trading illegally need to increase.
Abstract: Indonesia is a significant trader in marine molluscs and has a comprehensive legislative framework in place to protect and use molluscs sustainably. The recent inclusion of nautilus in Appendix II ...
TL;DR: The family Alycaeidae of the Philippines is revised based on the collections of the Senckenberg Museum and the Florida Museum of Natural History, and one new species and a subspecies of Chamalycaeus are described from Palawan.
Abstract: The family Alycaeidae of the Philippines is revised based on the collections of the Senckenberg Museum (Frankfurt am Main, Germany) and the Florida Museum of Natural History (Gainesville, U...
TL;DR: Investigation of morphological similarity and genetic relationships between samples of the genus Unio collected from rivers of the Ichkeul watershed found the variant form was found morphologically closer to U. ravoisieri than U. durieui, supporting the hypothesis that the new form is a phenotype of U. Ravoisieri and not a separate species.
Abstract: Unio, a freshwater mussel genus, has a low number of species in Tunisia, among them U. durieui, which is categorised as Endangered for conservation in IUCN Red List. The purpose of the stud...
TL;DR: It is concluded that D. spiracellum does not occur in Borneo and that it was probably obtained when the Samarang visited Cheju Island, and the specimens were most likely mislabelled.
Abstract: The alycaeid Cyclostoma spiracellum Adams & Reeve, 1850 (currently Dicharax spiracellum) was described from Borneo, based on shells from the expedition of HMS Samarang (1843–1846). A comparison wit...
TL;DR: Overall, despite some temporal variability in the biochemical composition, L. undulata could be harvested at any time of the year for human consumption, although it may be best to avoid peak spawning times, which occur around January in northern NSW.
Abstract: Lunella undulata is a subtropical-temperate marine gastropod which is harvested commercially from temperate reefs in Australia This paper aimed to evaluate monthly variation in the condition index
TL;DR: Improved understanding of the distribution of this complex and the level and structure of genetic diversity provided a picture of a naturally fragmented lineage, restricted to a particular ecological zone, identified six genetic clusters associated with population connectivity orientated north–south along mountain ranges, with east–west divisions between ranges.
Abstract: Powelliphanta is a genus of large carnivorous land snails endemic to New Zealand which display phenotypic variation within comparatively small geographic distances. The diversity within these snail...
TL;DR: A revision of Gastrocopta from the Galápagos Islands (Ecuador) is made; four new species from Pinzón, Santa Cruz and Floreana Islands are described; species previously known are redescribed and new locations are added.
Abstract: Fil: Miquel, Sergio Eduardo. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Oficina de Coordinacion Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
TL;DR: The Atlantic-Mediterranean Bursa scrobilator complex is reviewed integrating morphological, molecular (mitochondrial COI marker) and paleontological data and the two recent subspecies with their most probable ancestor, the Mediterranean Miocene fossil B. nodosa are discussed.
Abstract: The Atlantic-Mediterranean Bursa scrobilator (Linnaeus, 1758) complex is represented by three morphologically distinct forms, two that are extant corresponding to the nominal taxa Murex scrobilator...
TL;DR: The morphology and microstructure of 300 specimens of Scaliola cf.
Abstract: Taxonomical descriptions of gastropods result from studies on shells, particularly for microgastropods, using scanning electron microscopy (SEM) which can provide remarkable details. Scaliola spp.,...
TL;DR: The suggestion that oocyte numbers in each acinus depend more on the corresponding habitats of the pulmonate species than on their taxonomic relatedness is discussed.
Abstract: The development of gametes and somatic cells in the ovotestis of Laevicaulis alte of different body weights is studied using transmission electron microscopy. Spermatogenesis is a proliferative pha...
TL;DR: Two new species of Sulcospira are described from Hunan Province and Guangxi Zhuang Autonomous Region based on morphological and molecular evidence.
Abstract: A revision of Chinese freshwater Sulcospira gastropods is presented here based on analysis of the morphological characteristics and partial sequences of the mitochondrial genes 16S rRNA and cytochr...
TL;DR: This revision addresses two Southern Hemisphere genera in the family Buccinidae, Buccipagoda kengrahami and B. ponderi, and introduces Sagenotriton n.
Abstract: This revision addresses two Southern Hemisphere genera in the family Buccinidae. Buccipagoda kengrahami (Ponder, 1982) and B. ponderi n. sp. are recognised from off southern Australia and B. achilles n. sp. from off New Zealand. Sagenotriton n. gen. is introduced for S. ajax n. sp. from off New Zealand, and S. bathybius (Bouchet & Waren, 1986) and S. bonaespei (Barnard, 1963) from off South Africa.
TL;DR: This study confirms patterns of larval shells at the taxonomic rank of orders but other supraspecific patterns remain uncertain.
Abstract: The larval shells of Antalis circumcincta (Watson, 1879) (order Dentaliida), Pertusiconcha callithrix (Dall, 1889) (order Gadilida) and of an undetermined species of uncertain systematic position are described The material studied comprises mainly samples from deep waters, collected by expeditions along the southeast coast of Brazil The larval shell of the three taxa matches other types previously described in the literature Antalis circumcincta and P callithrix have four regions (protoconch A, protoconch B, teleoconch A, teleoconch B), but differ in dimensions and sculpture from each other, while the undetermined species has three regions (protoconch A, protoconch B, teleoconch B) A morphometric approach combined with a discriminant analysis also indicates that the three taxa are significantly distinct This study confirms patterns of larval shells at the taxonomic rank of orders but other supraspecific patterns remain uncertain
TL;DR: Significant new distribution records were obtained for seven species: Doryteuthis opalescens, Gonatus berryi, Todarodes pacificus, Opistoteuthis californiana, Benthoctopus leioderma, B. robustus and Graneledone boreopacifica.
Abstract: Deep-sea cephalopods are still poorly studied worldwide. In the case of the Mexican Pacific there is a general lack of basic information concerning their distribution and biology. A series of 132 specimens of pelagic and benthic deep-water cephalopods was obtained during the TALUD project. Samples were mostly obtained with benthic sampling gear that operated as mid-water trawls during the ascent of the nets. Micronekton and Isaacs-Kidd samplers were also occasionally used. The specimens (77 lots in total) were obtained at localities off western Mexico at depths between 122 m and 2200 m and belong to 31 species. Considering material identified to species level only, a total of 13 species were found only at a single station, while five others occurred in 5–6 stations (i.e., Leachia dislocata, Abraliopsis [Pfefferiteuthis] falco, Pterygioteuthis giardi, P. holeyi and Benthoctopus robustus). The most widespread species was Japetella diaphana, collected in 11 stations. Twenty-two of the 31 species are ...
TL;DR: Growth rates were obtained using data from tagging experiments fitted to the von Bertalanffy growth equation to eliminate the gap between growth and adult sizes in Terebralia palustris and semistriata.
Abstract: Mudwhelks dominate the sessile invertebrate epifauna of many Indo–West Pacific mangroves. They can be useful in monitoring the health of mangrove communities as they have a shorter lifespan...
TL;DR: The genus Tropidofusus can be distinguished from both Fulgurofusus and Coluzea on the basis of its lower spire, prominent peripheral keel, long, thin siphonal canal, as well as in having a much thinner shell that lacks axial sculpture.
Abstract: The genus Tripidofusus n gen is proposed to include Tropidofusus ypotethys n sp from bathyal depths off New Zealand, as well as Fulgurofusus aequilonius and Columbarium benthocallis fro
TL;DR: Six new nystiellid and epitoniid species from the eastern Pacific Ocean from Oregon to Alaska are discussed and six new species are described.
Abstract: Some nystiellid and epitoniid species from the eastern Pacific Ocean from Oregon to Alaska are discussed and six new species described herein: Eccliseogyra frausseni from deep water off southeaster...