Journal of Molluscan Studies最新文献_第9页

Fine-scale genetic structure of the freshwater snail Promenetus exacuous in the New York State region: the influences of historical colonization, habitat connectivity and dispersal ability 纽约地区淡水蜗牛Promenetus的精细遗传结构:历史殖民、栖息地连通性和扩散能力的影响

IF 1.2 4区生物学

Journal of Molluscan Studies Pub Date : 2021-06-11 DOI: 10.1093/MOLLUS/EYAB014

D. Keeney, P. Yurco

{"title":"Fine-scale genetic structure of the freshwater snail Promenetus exacuous in the New York State region: the influences of historical colonization, habitat connectivity and dispersal ability","authors":"D. Keeney, P. Yurco","doi":"10.1093/MOLLUS/EYAB014","DOIUrl":"https://doi.org/10.1093/MOLLUS/EYAB014","url":null,"abstract":"\u0000 The pulmonate freshwater snail Promenetus exacuous (Planorbidae) has a widespread patchy distribution throughout much of North America, including New York State and the surrounding areas. Minimal life history information exists for the species in this region and information on its genetic diversity and structure is currently lacking for any portion of its range. We examined the species’ reproductive behaviour, genetic diversity and population structure throughout New York and western Connecticut using cytochrome c oxidase subunit I (COI) haplotypes (241 snails) and 10 microsatellite loci (312 snails). Throughout the region, P. exacuous is a single, primarily outcrossing species with relatively high within-population genetic diversity. Populations are genetically differentiated and composed of divergent COI lineages. The region was colonized after the Wisconsin glacial retreat by snails from multiple, historically isolated populations and Pleistocene events played a major role in the historical diversification of lineages. Subsequent dispersal has likely been facilitated by birds and humans, but contemporary gene flow is low, resulting in genetic differentiation even among geographically proximate sites. Our data reveal that complex interactions between historical and contemporary processes contribute to the overall patterns of genetic diversity in freshwater snails.","PeriodicalId":50126,"journal":{"name":"Journal of Molluscan Studies","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2021-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44217149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Prey utilization by Neptunea arthritica (Caenogastropoda: Buccinidae): predation on gastropods and size-related variation 海参对猎物的利用:对腹足动物的捕食和大小相关的变化

IF 1.2 4区生物学

Journal of Molluscan Studies Pub Date : 2021-06-11 DOI: 10.1093/MOLLUS/EYAB016

Ryusei Yamakami, S. Wada

{"title":"Prey utilization by Neptunea arthritica (Caenogastropoda: Buccinidae): predation on gastropods and size-related variation","authors":"Ryusei Yamakami, S. Wada","doi":"10.1093/MOLLUS/EYAB016","DOIUrl":"https://doi.org/10.1093/MOLLUS/EYAB016","url":null,"abstract":"\u0000 The whelk Neptunea arthritica (Buccinidae) is a common fishery species in Hokkaido, northern Japan. Although ecological information is needed for fisheries management, there is only one paper examining the foraging ecology of this species and it reported that N. arthritica preyed mainly on the invasive mussel Mytilus galloprovincialis. To date, no studies have examined utilization of native prey species by this whelk. Here, we report the findings of a study on the native prey utilization by N. arthritica in an area where M. galloprovincialis is not present. We conducted line transect sampling every month from May 2018 to May 2019 on the western coast of Hakodate Bay, southwestern Hokkaido, Japan. Prey items were composed mostly of gastropods (72%), followed by bivalves (24%) and only a small amount of carrion (<4%). Overlapping spatial distributions were observed among size classes of N. arthritica, while the prey utilization varied with body size. Small individuals (<30 mm in shell height) preyed mainly on the small colloniid gastropod Homalopoma sangarense, while larger individuals (>40 mm) preyed mainly on two tegulid gastropods (Chlorostoma lischkei and Omphalius rusticus) and two venerid bivalves (Protothaca euglypta and Ruditapes philippinarum). There were positive size relationships between whelk body size and prey size for prey categories (Vetigastropoda, Caenogastropoda and Bivalvia) and even for the same prey species (H. sangarense, O. rusticus and P. euglypta). These results suggest that N. arthritica is a predator of mobile gastropods, especially during its early life stage, in areas without the invasive Mediterranean mussel. It is possible that the foraging strategy of N. arthritica may differ quite markedly between areas with and without the invasive mussel.","PeriodicalId":50126,"journal":{"name":"Journal of Molluscan Studies","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2021-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1093/MOLLUS/EYAB016","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45136822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

A forgotten subspecies of the land snail species Arianta arbustorum from a Pleistocene refuge in the Western Alps 一种被遗忘的陆地蜗牛亚种，来自西阿尔卑斯山的一个更新世避难所

IF 1.2 4区生物学

Journal of Molluscan Studies Pub Date : 2021-06-07 DOI: 10.1093/MOLLUS/EYAB017

B. Hausdorf, F. Walther

引用次数: 0

Insight into the adaptive evolution of mitochondrial genomes in intertidal chitons 潮间带石鳖线粒体基因组适应性进化研究

IF 1.2 4区生物学

Journal of Molluscan Studies Pub Date : 2021-06-03 DOI: 10.1093/MOLLUS/EYAB018

Dipanjana Dhar, D. Dey, Soumalee Basu, H. Fortunato

{"title":"Insight into the adaptive evolution of mitochondrial genomes in intertidal chitons","authors":"Dipanjana Dhar, D. Dey, Soumalee Basu, H. Fortunato","doi":"10.1093/MOLLUS/EYAB018","DOIUrl":"https://doi.org/10.1093/MOLLUS/EYAB018","url":null,"abstract":"\u0000 The intertidal zone is one of the most stressful environments, with extreme shifts in temperature, salinity, pH and oxygen concentration. Marine molluscs, particularly chitons that belong to the category of ecologically significant organisms, survive in this extreme environment, and are ideal systems for studying stress adaptation. Mitochondria are known to be critical for energy homeostasis, and changes in environmental factors result in their dysfunction and consequent injury to the organism. Intertidal organisms are exception in this respect because they are capable of maintaining mitochondrial integrity. Here, we used mitochondrial genetic components from seven chitons of the intertidal zone to infer phylogenetic relationships. Selection analyses on individual protein-coding genes (PCGs) were performed to identify and map potentially adaptive residues in the modelled structures of the mitochondrial respiratory chain complexes. The results showed significant amino acid changes in sites under diversifying selection for all the PCGs, indicating that the mitochondrial genome in chitons is undergoing adaptive evolution. Such sites were observed in the proton pump as well as in the translocation channel of the transmembrane helices and the surrounding loop regions, thus implying functional modification of the mitochondrial proteins essential for survival in the dynamic environment of the intertidal zone.","PeriodicalId":50126,"journal":{"name":"Journal of Molluscan Studies","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2021-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1093/MOLLUS/EYAB018","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48231820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Tightening the girdle: phylotranscriptomics of Polyplacophora 收紧腰带:多placophora的系统转录组学

IF 1.2 4区生物学

Journal of Molluscan Studies Pub Date : 2021-06-03 DOI: 10.1093/MOLLUS/EYAB019

J. Moles, T. J. Cunha, S. Lemer, David J. Combosch, Gonzalo Giribet

引用次数: 3

A new species of Sakuraeolis from Mozambique, described using 3D reconstruction of anatomy and phylogenetic analysis 一种来自莫桑比克的樱树新种，利用三维解剖重建和系统发育分析进行描述

IF 1.2 4区生物学

Journal of Molluscan Studies Pub Date : 2021-05-26 DOI: 10.1093/MOLLUS/EYAB010

Dawn C Ellis-Diamond, B. Picton, Yara Tibiriçá, J. Sigwart

{"title":"A new species of Sakuraeolis from Mozambique, described using 3D reconstruction of anatomy and phylogenetic analysis","authors":"Dawn C Ellis-Diamond, B. Picton, Yara Tibiriçá, J. Sigwart","doi":"10.1093/MOLLUS/EYAB010","DOIUrl":"https://doi.org/10.1093/MOLLUS/EYAB010","url":null,"abstract":"\u0000 Here we describe a new species of shallow-subtidal nudibranch from south-eastern Africa. The strikingly vivid orange sea slug with white markings belongs to the long-disputed family Facelinidae, and has been photographed and recorded in the region by divers for some time. Tomographic modelling was applied to produce a 3D anatomical reconstruction of the reproductive and digestive organs from serial sections. A molecular phylogeny using multiple markers (cytochrome c oxidase subunit I, 16S rRNA and histone H3) recovered three distinct clades within the paraphyletic Facelinidae, in agreement with other recent studies. This topology supported a genus-level clade, including the type species of Sakuraeolis Baba, 1965, S. enosimensis Baba, 1930, the new species described herein, S. arcana n. sp., and an undescribed sibling species that shares morphological resemblance to S. arcana n. sp. Facelina quatrefagesi Vayssière, 1888 is also recognized as Caloria quatrefagesi n. comb. on the basis of molecular and morphology affinity. Field observations provided insight into phenology, with a population decline noted in August. Although the new species does not have the penial structure previously considered diagnostic for Sakuraeolis, the decision was made on the balance of evidence for phylogenetic affinity to amend the diagnosis of the genus to accommodate S. arcana n. sp.","PeriodicalId":50126,"journal":{"name":"Journal of Molluscan Studies","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2021-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1093/MOLLUS/EYAB010","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43804560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Illumination can change the periodic variation of the oxygen consumption rate of Crassostrea gigas 光照可以改变长牡蛎耗氧速率的周期性变化

IF 1.2 4区生物学

Journal of Molluscan Studies Pub Date : 2021-05-17 DOI: 10.1093/MOLLUS/EYAB012

Zemin Zhao, Rihao Cong, Kecheng Zhang, Wei Wang, Guofan Zhang, Ying Pan, Li Li

引用次数: 1

Effects of water temperature on glochidium viability of Unio crassus and Sinanodonta woodiana: implications for conservation, management and captive breeding 水温对厚脊藻和木纹Sinanodonta glochidium活力的影响：对保护、管理和圈养的影响

IF 1.2 4区生物学

Journal of Molluscan Studies Pub Date : 2021-05-07 DOI: 10.1093/MOLLUS/EYAB011

Alia Benedict, J. Geist

{"title":"Effects of water temperature on glochidium viability of Unio crassus and Sinanodonta woodiana: implications for conservation, management and captive breeding","authors":"Alia Benedict, J. Geist","doi":"10.1093/MOLLUS/EYAB011","DOIUrl":"https://doi.org/10.1093/MOLLUS/EYAB011","url":null,"abstract":"\u0000 The global decline of freshwater bivalves (Unionida) has prompted many programmes for their conservation and augmentation, which often include a captive breeding component. One key point to such programmes is the collection, maintenance and use of mussel glochidium larvae, which require attachment to a fish host in a sensitive parasitic stage of their life cycle. Understanding the thermal limits of glochidia can increase knowledge of mussel larval survival and ultimately aid in the development of conservation programmes. Glochidia of the endangered thick-shelled river mussel Unio crassus and the non-native Chinese pond mussel Sinanodonta woodiana were observed for active clamping ability at 5, 15, 17, 20 and 25 °C over the course of a 7-d period. The results from this study confirm that an inverse relationship between water temperature and larval viability can be observed in both species. Additionally, the significantly higher thermal tolerance of S. woodiana indicates that the species exhibits competitive invasive behaviour beginning from the larval stage. These findings also suggest that the collection and transportation of glochidia from genetically important yet distant populations is feasible if the larvae can be maintained at temperatures between 5 and 15 °C.","PeriodicalId":50126,"journal":{"name":"Journal of Molluscan Studies","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2021-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1093/MOLLUS/EYAB011","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48414648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Statocyst content in Aeolidida (Nudibranchia) is an uninformative character for phylogenetic studies 静泡含量对系统发育研究没有重要意义

IF 1.2 4区生物学

Journal of Molluscan Studies Pub Date : 2021-04-21 DOI: 10.1093/MOLLUS/EYAB009

C. Baumann, E. Laetz, H. Wägele

引用次数: 0

The neglected operculum: a revision of the opercular characters in river snails (Caenogastropoda: Viviparidae) 被忽视的肠盖:河螺肠盖特征的修正(Caenogastropoda:胎生纲)

IF 1.2 4区生物学

Journal of Molluscan Studies Pub Date : 2021-04-13 DOI: 10.1093/MOLLUS/EYAB008

Le-Jia Zhang, T. Rintelen

引用次数: 2