Molluscan Research最新文献_第4页

Assessment of blacklip rock oyster, Saccostrea lineage J, spat growth and survival in recirculating upweller and downweller nursery systems 黑唇岩牡蛎，Saccotrea谱系J，在循环上下育苗系统中的吐口水生长和存活评估

IF 1 4区生物学

Molluscan Research Pub Date : 2023-04-03 DOI: 10.1080/13235818.2023.2217677

S. Nowland, B. Roberts

{"title":"Assessment of blacklip rock oyster, Saccostrea lineage J, spat growth and survival in recirculating upweller and downweller nursery systems","authors":"S. Nowland, B. Roberts","doi":"10.1080/13235818.2023.2217677","DOIUrl":"https://doi.org/10.1080/13235818.2023.2217677","url":null,"abstract":"ABSTRACT The blacklip rock oyster, Saccostrea lineage J, has the potential to support new aquaculture developments throughout its range in the tropical Indo-Pacific region, but lack of research investment in understanding basic biology has been a key failure point in the past. This study assessed Saccostrea lineage J spat growth and survival in downweller and upweller nursery systems, with the aim of establishing baseline biological information and evaluating spat performance to support commercialisation efforts. Downweller and upweller nursery systems were similarly effective at rearing spat, with mean dorsoventral measurement in both systems reaching a 5 mm deployment size at 59 days post hatch. Growth rates reported in this study of 0.19 and 0.20 mm day−1 in the downweller and upweller, respectively, are comparable to other hatchery-produced tropical and subtropical bivalve spat. Based on the results of this study, it is recommended that spat be held in nurseries for approximately two months to reach a 5 mm deployment size. The information obtained in this study is the first documentation of Saccostrea lineage J spat growth and survival, and the methods used provide a basis for commercial production of this species.","PeriodicalId":18857,"journal":{"name":"Molluscan Research","volume":"43 1","pages":"101 - 108"},"PeriodicalIF":1.0,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44096798","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

Reproductive processes of the edible snails Helix lucorum (Linnaeus, 1758) and Eobania vermiculata (O.F. Müller, 1774) in their natural habitats 食用蜗牛螺旋lucorum (Linnaeus, 1758)和蛭螺(O.F. m<s:1> ller, 1774)在自然生境中的繁殖过程

IF 1 4区生物学

Molluscan Research Pub Date : 2023-04-03 DOI: 10.1080/13235818.2023.2201904

İhsan Ekin

{"title":"Reproductive processes of the edible snails Helix lucorum (Linnaeus, 1758) and Eobania vermiculata (O.F. Müller, 1774) in their natural habitats","authors":"İhsan Ekin","doi":"10.1080/13235818.2023.2201904","DOIUrl":"https://doi.org/10.1080/13235818.2023.2201904","url":null,"abstract":"ABSTRACT The purpose of this study is to describe the reproductive processes of the snails Helix lucorum and Eobania vermiculata, which are abundant in Diyarbakır, SE Turkey. Reproductive behaviours and eggs of E. vermiculata and H. lucorum were monitored in the gardens of the Commodity Exchange Building, and Hevsel Gardens. The habitats of the species were observed over a one-year period (2022–2023). Helix lucorum reproduction takes place at the age of three to four years, from late October to December. The weight of the adult snails was 22 ± 4 g. The snails laid an average of 82 ± 12 eggs, with a weight of 0.23 ± 0.03 mg, and diameter of 5 mm; they hatched in 30 ± 4 days. Eobania vermiculata reproduction takes place at the age of two years, and breeding is mainly from early October to early December. The adult snails weighed 12 ± 4 g, and laid an average of 70 ± 14 eggs, with each egg weighing 0.16 ± 0.04 mg and measuring 3 mm in diameter. They hatched in 32 ± 5 days. In summary, the study offers details on the reproductive processes of two commercially significant snails, whose breeding habits may vary based on local climatic conditions.","PeriodicalId":18857,"journal":{"name":"Molluscan Research","volume":"43 1","pages":"138 - 143"},"PeriodicalIF":1.0,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42738307","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

The double life of Bulimus ovoideus Bruguière, 1789: taxonomic implications for Streptaxidae and Camaenidae (Mollusca, Stylommatophora) 1789年bruguiires Bulimus ovoideus的双重生活:链虫科和Camaenidae的分类意义(软体动物目，柱头虫科)

IF 1 4区生物学

Molluscan Research Pub Date : 2023-04-03 DOI: 10.1080/13235818.2023.2202807

F. Köhler, D. Herbert, B. Rowson, G. Rosenberg

{"title":"The double life of Bulimus ovoideus Bruguière, 1789: taxonomic implications for Streptaxidae and Camaenidae (Mollusca, Stylommatophora)","authors":"F. Köhler, D. Herbert, B. Rowson, G. Rosenberg","doi":"10.1080/13235818.2023.2202807","DOIUrl":"https://doi.org/10.1080/13235818.2023.2202807","url":null,"abstract":"ABSTRACT The name Bulimus ovoideus Bruguière, 1789 is in current use for two different species, one from East Africa and one from the Philippines. The name has also been declared as the type species of both Edentulina Pfeiffer, 1856 (Streptaxidae) and Cochlostyla Férussac, 1821 (Camaenidae). We demonstrate that the use of this name for a Philippine camaenid is based on an early misidentification. To clarify the situation, we invoke Article 70.3 of the Code of Zoological Nomenclature, concerning misidentified type species, to select the taxonomic species actually involved, Bulinus luzonicus Sowerby I, 1833, as the type species of Cochlostyla. Cochlostyla thus becomes a senior objective synonym of Canistrum Mörch, 1852. Under Article 40.2 of the Code, Helicostylinae Ihering, 1909 takes precedence of Cochlostylinae Möllendorff, 1890. We further show that the Philippine camaenids Orthostylus Beck, 1837 and Dryocochlias Möllendorff, 1898 are objective synonyms with the former name having priority. Finally, we designate a neotype for Bulimus ovoideus to stabilise its taxonomy. These actions permit the current nomenclature to be maintained with a minimum of disruption. The currently accepted name of the taxon in question is Edentulina ovoidea (Bruguière, 1789).","PeriodicalId":18857,"journal":{"name":"Molluscan Research","volume":"43 1","pages":"123 - 129"},"PeriodicalIF":1.0,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46118819","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

Towards understanding of the taxonomy within the genus Emmericia Brusina, 1870 (Caenogastropoda: Truncatelloidea) 对Brusina Emmeria属分类学的理解，1870（Caeno腹足目：Truncatelloide）

IF 1 4区生物学

Molluscan Research Pub Date : 2023-04-03 DOI: 10.1080/13235818.2023.2212413

Aleksandra Jaszczyńska, A. Osikowski, A. Falniowski, Sebastian Hofman

{"title":"Towards understanding of the taxonomy within the genus Emmericia Brusina, 1870 (Caenogastropoda: Truncatelloidea)","authors":"Aleksandra Jaszczyńska, A. Osikowski, A. Falniowski, Sebastian Hofman","doi":"10.1080/13235818.2023.2212413","DOIUrl":"https://doi.org/10.1080/13235818.2023.2212413","url":null,"abstract":"ABSTRACT Emmericia Brusina, 1870 is the only genus of the family Emmericiidae Brusina, 1870, and it inhabits springs and rivers from north-east Italy to southern Croatia, Bosnia and Herzegovina, and Montenegro. Their variable shells have resulted in taxonomic chaos with from one to sixty seven species recognised in Emmericia. Recently four species have been distinguished: E. patula (Brumati, 1838), E. expansilabris Bourguignat, 1881, E. narentana Bourguignat, 1881, and E. ventricosa Brusina, 1870. In the present study, Emmericia from 13 localities were collected. Principal component analysis on seven biometric characters measured on shells from three localities inhabited by two nominal species demonstrated the distinctiveness of these three studied populations. In contrast, the differences between the two populations representing E. patula were not smaller than between either of them and E. expansilabris. Similar remarks apply to the shells of the other two species. The sequences of the cytochrome oxidase subunit I did not confirm that E. expansilabris is a distinct species, so it is regarded as a synonym of E. patula, but did confirm the distinctness of E. ventricosa, which inhabits the localities higher above sea level. No sequences of E. narentana were obtained.","PeriodicalId":18857,"journal":{"name":"Molluscan Research","volume":"43 1","pages":"109 - 122"},"PeriodicalIF":1.0,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48129528","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

A population study of giant clams (Tridacninae) on the Great Barrier Reef over three-decades 大堡礁巨型蛤蜊（Tridacninae）30多年的种群研究

IF 1 4区生物学

Molluscan Research Pub Date : 2023-04-03 DOI: 10.1080/13235818.2023.2214156

R. Braley

{"title":"A population study of giant clams (Tridacninae) on the Great Barrier Reef over three-decades","authors":"R. Braley","doi":"10.1080/13235818.2023.2214156","DOIUrl":"https://doi.org/10.1080/13235818.2023.2214156","url":null,"abstract":"ABSTRACT Four giant clam species were monitored for population abundance, recruitment, growth and spatial distribution over three decades. Natural, undisturbed populations were mapped at five sites on the Great Barrier Reef from surveys in 1982–1986, 1987–1992, 2007–2009 and 2017. Populations of all species declined at three sites due to low recruitment and death of old clams. At two sites a significant juvenile recruitment cohort of Tridacna gigas and T. derasa followed a mass mortality event which returned the population to the pre-mass mortality abundance. At one site 55.5% of the cohort survived after five years. Population abundance of T. squamosa and Hippopus hippopus increased slightly at the 2017 survey at these two sites. Tridacna gigas and T. derasa live long enough to reproduce successfully in some years, as evidenced by recruitment. Where significant recruitment occurred, high-aggregation reproductive centres may remain functional for many decades. Individual growth rate from the recruitment surveys averaged six cm yr−1 to five years. Longer-term growth rates averaged nearly two cm yr−1 with the highest rate being over four cm yr−1. Climate change will have some deleterious effects on giant clam populations.","PeriodicalId":18857,"journal":{"name":"Molluscan Research","volume":"43 1","pages":"77 - 95"},"PeriodicalIF":1.0,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47075619","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

Tracking the growth of the edible Moroccan snail, Otala tingitana (Paladilhe, 1875), raised under controlled conditions 追踪可食用摩洛哥蜗牛Otala tingitana (Paladilhe, 1875)在受控条件下的生长情况

IF 1 4区生物学

Molluscan Research Pub Date : 2023-04-03 DOI: 10.1080/13235818.2023.2211528

Abdelmajid El Khayari, E. Rour, Nabil Mzoudi

{"title":"Tracking the growth of the edible Moroccan snail, Otala tingitana (Paladilhe, 1875), raised under controlled conditions","authors":"Abdelmajid El Khayari, E. Rour, Nabil Mzoudi","doi":"10.1080/13235818.2023.2211528","DOIUrl":"https://doi.org/10.1080/13235818.2023.2211528","url":null,"abstract":"ABSTRACT The development of the heliciculture sector in Africa, particularly in Morocco, requires a better understanding of the environmental and nutritional growth conditions of endemic snails. To date, little is known about Otala tingitana snails, a Moroccan endemic edible species with a growing economic and agronomic interest. In this study, we investigated the optimal conditions for efficient snail growth. Experiments were carried out to track the growth of snails under controlled conditions of air temperature, humidity and photoperiod from hatching to maturity. In accordance with previous studies on other types of snails, weight, shell growth, dietary ingestion, ecological yield, mortality rate and maturation time were all monitored. Results showed that a combination of 20°C temperature, short photoperiod (8L-16D) and high humidity (80% RH) represents the optimal conditions for efficient growth of this species. Thus, thanks to the improved rearing conditions, two complete life cycles could be achieved within a single year. This allows for significant improvement in the productivity and the rearing conditions of this species for nutritional and other purposes.","PeriodicalId":18857,"journal":{"name":"Molluscan Research","volume":"43 1","pages":"144 - 151"},"PeriodicalIF":1.0,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43257278","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

Survey and conservation assessment of the land snail fauna of Coolah Tops National Park in the Hunter Valley area of New South Wales, Australia 澳大利亚新南威尔士州猎人谷地区库拉托普斯国家公园陆地蜗牛区系的调查和保护评估

IF 1 4区生物学

Molluscan Research Pub Date : 2023-01-02 DOI: 10.1080/13235818.2023.2183538

M. Murphy, M. Shea

引用次数: 0

The curious case of Phyllidia ocellata and the first molecular data of three phyllidiid species from India (Gastropoda, Heterobranchia, Phyllidiidae) ocellata Phyllidia的奇特案例和印度三种phyllidiid物种（腹足目、异鳃目、Phyllidiidae）的首次分子数据

IF 1 4区生物学

Molluscan Research Pub Date : 2023-01-02 DOI: 10.1080/13235818.2023.2191154

S. Dixit, N. Yonow, Vishnu K. Venugopal, H. Manjebrayakath, N. Saravanane

引用次数: 0

Nomenclatural changes in fossil cephalopods (Mollusca: Cephalopoda) 头足类化石的命名变化（软体动物纲：头足目）