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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 Q3 Agricultural and Biological Sciences Pub Date : 2023-04-03 DOI: 10.1080/13235818.2023.2211528
Abdelmajid El Khayari, E. Rour, Nabil Mzoudi
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.
摘要:在非洲,特别是在摩洛哥,螺旋藻养殖部门的发展需要更好地了解当地蜗牛的环境和营养生长条件。迄今为止,人们对Otala tingitana蜗牛知之甚少,这是一种摩洛哥特有的可食用物种,具有日益增长的经济和农业利益。在本研究中,我们研究了蜗牛高效生长的最佳条件。在一定的温度、湿度和光照条件下,对钉螺从孵化到成熟的过程进行了跟踪研究。与以往对其他种类蜗牛的研究一样,对体重、壳生长、日粮摄食量、生态产量、死亡率和成熟时间进行了监测。结果表明,20℃温度、短光周期(8L-16D)和高湿度(80% RH)是该树种高效生长的最佳条件。因此,由于饲养条件的改善,可以在一年内实现两个完整的生命周期。这使得该品种在营养和其他目的方面的生产力和饲养条件得到显著改善。
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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 Q3 Agricultural and Biological Sciences Pub Date : 2023-01-02 DOI: 10.1080/13235818.2023.2183538
M. Murphy, M. Shea
ABSTRACT Coolah Tops is an isolated high elevation mesic refuge on the dry western slopes of the Great Dividing Range in New South Wales, eastern Australia. Field surveys of the land snail fauna of Coolah Tops National Park in 2000–2001 and 2018 sampled 28 sites between 556 and 1234 m elevation (Australian Height Datum). Over 1200 specimens in total were collected and were assigned to 29 species or morpho-species in six families. Seven taxa are currently known only from Coolah Tops. Preliminary assessment of five of these concluded they meet IUCN criteria for endangered status. The land snail community of the Coolah Tops highland area is threatened by anthropogenic climate change and is considered to be of outstanding conservation value.
摘要Coolah Tops是位于澳大利亚东部新南威尔士州Great Dividing Range西部干燥斜坡上的一个孤立的高海拔mesic避难所。2000-2001年和2018年对库拉托普斯国家公园陆地蜗牛动物群的实地调查采样了556至1234个地点 m高程(澳大利亚高程基准)。共收集了1200多个标本,分为6科29种或形态种。目前已知的七个分类群仅来自库拉顶部。对其中五种的初步评估得出结论,它们符合国际自然保护联盟的濒危状态标准。库拉高地地区的陆生蜗牛群落受到人为气候变化的威胁,被认为具有突出的保护价值。
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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 Q3 Agricultural and Biological Sciences Pub Date : 2023-01-02 DOI: 10.1080/13235818.2023.2191154
S. Dixit, N. Yonow, Vishnu K. Venugopal, H. Manjebrayakath, N. Saravanane
ABSTRACT The current study presents the first molecular data of three species of the family Phyllidiidae, Phyllidia ocellata, Phyllidia alyta and Phyllidiella rosans, from Indian waters. The P. ocellata molecular sequences closely match those available from the Pacific Ocean, whereas P. alyta and P. rosans form independent clades, confirming their identifications as distinct species. Phyllidia ocellata, frequently found in the Indo-Pacific tropical coral reefs, is renowned for its wide range of colours and external forms. Numerous variations have been found and are being examined at the molecular level, and the subject of this study is another variation that, until dissection and molecular analysis, was thought to be a colour form of Phyllidia multituberculata. Although India has a long history of heterobranch research, no phyllidiid species from Indian waters have ever been the subject of molecular research.
摘要:本文首次报道了来自印度水域的三种Phyllidiella ocellata、Phyllidia alyta和Phyllidiella rosans的分子资料。P. ocellata的分子序列与太平洋的分子序列非常接近,而P. alyta和P. rosans形成独立的分支,证实了它们是不同的物种。通常在印度洋-太平洋热带珊瑚礁中发现的菲利亚·塞拉塔(Phyllidia ocellata)以其丰富的颜色和外形而闻名。已经发现了许多变异,并正在分子水平上进行研究,而这项研究的主题是另一种变异,直到解剖和分子分析,被认为是多瘤Phyllidia multituberculata的一种彩色形式。尽管印度有着悠久的异枝研究历史,但从未有来自印度水域的千分纲物种成为分子研究的对象。
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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)
IF 1 4区 生物学 Q3 Agricultural and Biological Sciences Pub Date : 2023-01-02 DOI: 10.1080/13235818.2023.2179850
F. Ceccolini, F. Cianferoni
ABSTRACT Three junior homonyms are found within the genera of fossil Cephalopoda and the following replacement names are proposed: Nautilaphractus Ceccolini and Cianferoni nom. nov. = Aphractus Shimansky, 1967 nec Redtenbacher in Brunner von Wattenwyl, 1895; Uralharuspex Ceccolini and Cianferoni nom. nov. = Haruspex Shimansky, 1968 nec Thomson, 1864. Accordingly, two new combinations (comb. nov.) are made. Furthermore, the genus group name Plesioturrilites Breistroffer, 1953 is revalidated. urn:lsid:zoobank.org:pub:9143E1C6-68F5-4FC1-BB1D-5F300B89ADC4
摘要在头足类化石属中发现了三个初级同音异义词,并提出了以下替代名称:Nautilaphractus Ceccolini和Cianferoni nom。十一月 = Aphractus Shimansky,1967 nec Redtenbacher in Brunner von Wattenwyl,1895;Uralharusspex Ceccolini和Cianferoni(化名)。十一月 = Haruspex Shimansky,1968年nec Thomson,1864年。因此,产生了两个新的组合(comb.nov.)。此外,1953年的属群名称Plesioturrilites Breistrover被重新验证。urn:lsid:zoobank.org/pub:9143E1C6-68F5-4FC1-BB1D-5F300B89ADC4
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引用次数: 0
Addendum to: Uncovering the biodiversity of New Zealand Solenogastres (Mollusca, Aplacophora) with three new species of Proneomeniidae Simroth, 1893 and new data for Dorymenia quincarinata (Ponder, 1970). Molluscan Research 42, 271–287. 附录:利用prooneomeniidae Simroth的三个新种和Dorymenia quincarinata (Ponder, 1970)的新数据揭示新西兰螺线管动物(软体动物,Aplacophora)的生物多样性(1893)。软体动物研究42,271-287。
IF 1 4区 生物学 Q3 Agricultural and Biological Sciences Pub Date : 2023-01-02 DOI: 10.1080/13235818.2023.2174364
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引用次数: 0
Meretrix taiwanica (Bivalvia: Veneridae), a previously misidentified new species in Taiwan 台湾银杏(双壳亚纲:银杏科),以前在台湾被误认的新种
IF 1 4区 生物学 Q3 Agricultural and Biological Sciences Pub Date : 2023-01-02 DOI: 10.1080/13235818.2023.2189428
Sheng-Tai Hsiao, S. Chuang
ABSTRACT This paper describes a new Asian hard clam, Meretrix taiwanica sp. n., found in the Tamsui River estuary in northern Taiwan. This species was formerly identified as M. lusoria, and was considered to be a descendant of a clam that originated in Japan. A molecular phylogenetic analysis, however, demonstrated that Meretrix taiwanica sp. n. is closely related to M. petechialis and M. lusoria. Meretrix taiwanica is distinguished by its smaller socket width and shorter posterior dorsal margin. This species is distributed throughout the coast of Taiwan on the southern coast of China.
摘要本文报道了在台湾北部淡水河口发现的一种新的亚洲硬蛤——台湾文蛤。该物种以前被鉴定为M.lusoria,被认为是起源于日本的一种蛤蜊的后代。然而,一项分子系统发育分析表明,台湾Meretrix taiwanica sp.n与紫锥虫和露索里虫关系密切。台湾文蛤以其较小的窝宽度和较短的背侧后缘而著称。本种分布于中国南部沿海的台湾沿海。
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引用次数: 0
Morphological variations among populations of Bulinus forskalii (Ehrenberg, 1831) from Cameroon 喀麦隆毛球藻(Ehrenberg,1831)种群的形态变异
IF 1 4区 生物学 Q3 Agricultural and Biological Sciences Pub Date : 2023-01-02 DOI: 10.1080/13235818.2023.2170160
Parfait Laurent Basga, Romuald Isaka Kamwa Ngassam, P. Nwane, Dili Siddi Ousman Ila, R. Mimpfoundi
ABSTRACT Climatic stratification from equatorial rainforest to Sahelian savannah in Cameroon implies successive bioclimatic ecosystems, various natural and artificial situations that may generate morphological and genetic adaptation of populations of Bulinus forskalii (Ehrenberg, 1831) which is widely distributed throughout the country. The present research was undertaken on 955 snails sampled from 12 populations along a south–north transect to investigate morphological variations of shells. Shell colour varied from dark brown to whitish with Sudano–Sahelian shells being brownish through to whitish, shouldered and strongly carinate. Morphometric characters varied greatly from one population to another, with all shell parameters being highly correlated to shell height. Sudano–Sahelian shells were smaller than equatorial shells. From Sangmélima in the equatorial forest region to Marao in the Sudano–Sahelian region a gradual decrease of shell dimensions was apparent, indicating a morphocline. This could reflect the role played by ecological factors on snail population dynamics.
摘要喀麦隆从赤道雨林到萨赫勒稀树草原的气候分层意味着连续的生物气候生态系统、各种自然和人为情况,这些情况可能会产生广泛分布在全国各地的毛喉蟾蜍种群的形态和遗传适应(Ehrenberg,1831)。本研究对来自南北样带12个种群的955只蜗牛进行了采样,以调查蜗牛外壳的形态变化。外壳颜色从深棕色到白色不等,苏丹-萨赫勒地区的外壳从棕色到白色,有肩,有强烈的隆凸。不同种群的形态特征差异很大,所有外壳参数都与外壳高度高度高度相关。苏达诺-萨赫勒地区的贝壳比赤道地区的贝壳小。从赤道森林地区的桑梅里马到苏达诺-萨赫勒地区的马劳,外壳尺寸明显逐渐减小,表明存在形态渐变。这可以反映生态因素对蜗牛种群动态的影响。
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引用次数: 0
The first galeommatoidean from inland waters: a new species of Arthritica (Bivalvia, Lasaeidae) from artesian springs in South Australia, with comments on other Australian members of the genus 第一个来自内陆水域的galeommatoidean:来自南澳大利亚自流泉的Arthritica(双壳纲,Lasaeidae)的一个新种,以及对该属其他澳大利亚成员的评论
IF 1 4区 生物学 Q3 Agricultural and Biological Sciences Pub Date : 2022-12-23 DOI: 10.1080/13235818.2022.2151070
W. Ponder
ABSTRACT Arthritica korniushini n. sp. is described from three groups of artesian mound springs in the southwestern part of the Lake Eyre Spring Supergroup. All other described species of Arthritica are oceanic or estuarine. The four previously described Australian species referrable to Arthritica are reviewed.
摘要:从艾尔湖泉超群西南部的三组自流丘泉中,描述了一种korniushini关节炎(Arthritica korniushini n.sp.)。所有其他描述的节肢动物物种都是海洋或河口物种。综述了先前描述的四种澳大利亚节肢动物。
{"title":"The first galeommatoidean from inland waters: a new species of Arthritica (Bivalvia, Lasaeidae) from artesian springs in South Australia, with comments on other Australian members of the genus","authors":"W. Ponder","doi":"10.1080/13235818.2022.2151070","DOIUrl":"https://doi.org/10.1080/13235818.2022.2151070","url":null,"abstract":"ABSTRACT Arthritica korniushini n. sp. is described from three groups of artesian mound springs in the southwestern part of the Lake Eyre Spring Supergroup. All other described species of Arthritica are oceanic or estuarine. The four previously described Australian species referrable to Arthritica are reviewed.","PeriodicalId":18857,"journal":{"name":"Molluscan Research","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49417122","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
Directly observed images through the shell-lenses of Onithochiton neglectus (Mollusca: Polyplacophora: Chitonidae) 忽略石壳(onthochiton negectus)壳透镜直接观察图像(软体动物目:多placophora:石壳科)
IF 1 4区 生物学 Q3 Agricultural and Biological Sciences Pub Date : 2022-11-18 DOI: 10.1080/13235818.2022.2144089
Abigail M. Smith, B. Peebles, H. Spencer
ABSTRACT The dorsal shell surface of the New Zealand-endemic chitonid Onithochiton neglectus exhibits ocelli (eyes) associated with sensory organs (aesthetes) penetrating the shell. Each ocellus includes a mineral lens which focusses light onto a retina, potentially able to resolve images. In order to discover the spatial resolution of lenses of O. neglectus, we isolated them, examined their mineralogy with X-ray diffractometry, imaged the constituent crystals with scanning electron microscopy, and mounted them onto a camera to directly observe and record images. Lenses of O. neglectus are aragonitic and therefore birefringent, providing two different focal lengths, possibly one for in-air and one for underwater vision. Chitons may be able to image nearby shapes with visual acuity equivalent to 6/24 (m), a VAdec of 0.25. Onithochiton neglectus lenses can focus images in air about as well as a person with low visual acuity, sufficient to discern shapes and shadows in the surrounding environment. Lenses from subtidal O. neglectus were less eroded than those from intertidal environments; chitons in different habitats exhibit different visual acuity. It is unclear why a few lineages of chitons have developed such complex eyes; we speculate that body-orientation and navigation could be among the advantages driving such development.
新西兰特有的壳类动物onthochiton ectus的背壳表面显示出与穿透壳的感觉器官(审美器)相关的眼(眼睛)。每个细胞都包含一个矿物晶状体,可以将光线聚焦到视网膜上,从而有可能分辨图像。为了研究忽略花的透镜的空间分辨率,我们对其进行了分离,用x射线衍射检查了它们的矿物学,用扫描电子显微镜对其组成晶体进行了成像,并将它们安装在相机上直接观察和记录图像。忽略水藻的透镜是文石的,因此具有双折射性,提供了两种不同的焦距,可能一种用于空中视觉,一种用于水下视觉。石鳖可能能够成像附近的形状,其视力相当于6/24 (m), VAdec为0.25。Onithochiton neglectus镜头可以集中图像在空气以及人与低视力,足以辨别形状和阴影在周围的环境中。潮下环境的水晶石比潮间环境的水晶石受侵蚀程度要小;不同栖息地的石鳖表现出不同的视觉灵敏度。目前还不清楚为什么一些石鳖进化出了如此复杂的眼睛;我们推测,身体定向和导航可能是推动这种发展的优势之一。
{"title":"Directly observed images through the shell-lenses of Onithochiton neglectus (Mollusca: Polyplacophora: Chitonidae)","authors":"Abigail M. Smith, B. Peebles, H. Spencer","doi":"10.1080/13235818.2022.2144089","DOIUrl":"https://doi.org/10.1080/13235818.2022.2144089","url":null,"abstract":"ABSTRACT The dorsal shell surface of the New Zealand-endemic chitonid Onithochiton neglectus exhibits ocelli (eyes) associated with sensory organs (aesthetes) penetrating the shell. Each ocellus includes a mineral lens which focusses light onto a retina, potentially able to resolve images. In order to discover the spatial resolution of lenses of O. neglectus, we isolated them, examined their mineralogy with X-ray diffractometry, imaged the constituent crystals with scanning electron microscopy, and mounted them onto a camera to directly observe and record images. Lenses of O. neglectus are aragonitic and therefore birefringent, providing two different focal lengths, possibly one for in-air and one for underwater vision. Chitons may be able to image nearby shapes with visual acuity equivalent to 6/24 (m), a VAdec of 0.25. Onithochiton neglectus lenses can focus images in air about as well as a person with low visual acuity, sufficient to discern shapes and shadows in the surrounding environment. Lenses from subtidal O. neglectus were less eroded than those from intertidal environments; chitons in different habitats exhibit different visual acuity. It is unclear why a few lineages of chitons have developed such complex eyes; we speculate that body-orientation and navigation could be among the advantages driving such development.","PeriodicalId":18857,"journal":{"name":"Molluscan Research","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44401333","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 new species of cephalaspidean sea slug of the genus Melanochlamys Cheeseman, 1881 (Heterobranchia: Aglajidae) from the Bay of Bengal, India 印度孟加拉湾的一种Melanochlamys Cheeseman属的头棘海蛞蝓新种,1881(异鳃亚目:Aglajidae)
IF 1 4区 生物学 Q3 Agricultural and Biological Sciences Pub Date : 2022-10-02 DOI: 10.1080/13235818.2022.2139583
P. Tudu, S. Sajan, Soumen Roy, Amit Mukhapadhyay, B. Tripathy, A. Mohapatra
ABSTRACT A new species of head-shield sea slug, Melanochlamys bengalensis, is described from the northern part of the eastern coast of India using both external and internal morphological characters. Its novel status is supported by a molecular analysis. The maximum likelihood (ML) genetic tree (COI gene sequence) indicates that the new species represents a distinct clade compared to the other species of the genus Melanochlamys. The K2P distance of the new species is 16.2–23.7%, which is considerably more than the other congeners. This species was collected from the intertidal zone of the sandy beaches of Bakkhali, Tajpur, New Digha, Udaipur, Talsari, Chandipur and Kanika Island. Additionally, the list of valid species and distribution of all members of the genus Melanochlamys is presented herein.
摘要利用外部和内部形态特征,描述了印度东海岸北部的一种新的头盾海蛞蝓Melanochlamys bengalensis。分子分析支持了它的新地位。最大似然(ML)遗传树(COI基因序列)表明,与黑霉属的其他物种相比,新物种代表了一个独特的分支。新物种的K2P距离为16.2~23.7%,远大于其他同类物种。该物种采集于Bakkhali、Tajpur、New Digha、Udaipur、Talsari、Chandipur和Kanika岛沙滩的潮间带。此外,本文还列出了黑色素蝶属所有成员的有效物种和分布列表。
{"title":"A new species of cephalaspidean sea slug of the genus Melanochlamys Cheeseman, 1881 (Heterobranchia: Aglajidae) from the Bay of Bengal, India","authors":"P. Tudu, S. Sajan, Soumen Roy, Amit Mukhapadhyay, B. Tripathy, A. Mohapatra","doi":"10.1080/13235818.2022.2139583","DOIUrl":"https://doi.org/10.1080/13235818.2022.2139583","url":null,"abstract":"ABSTRACT A new species of head-shield sea slug, Melanochlamys bengalensis, is described from the northern part of the eastern coast of India using both external and internal morphological characters. Its novel status is supported by a molecular analysis. The maximum likelihood (ML) genetic tree (COI gene sequence) indicates that the new species represents a distinct clade compared to the other species of the genus Melanochlamys. The K2P distance of the new species is 16.2–23.7%, which is considerably more than the other congeners. This species was collected from the intertidal zone of the sandy beaches of Bakkhali, Tajpur, New Digha, Udaipur, Talsari, Chandipur and Kanika Island. Additionally, the list of valid species and distribution of all members of the genus Melanochlamys is presented herein.","PeriodicalId":18857,"journal":{"name":"Molluscan Research","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47890764","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
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Molluscan Research
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