Pub Date : 2021-04-03DOI: 10.1080/13235818.2021.1937016
H. Fukuda, S. Ishida, Tetsuya Watanabe, S. Yoshimatsu, T. Haga
ABSTRACT Species of Sunetta Link, 1807 from Japan and the neighbouring regions (Korea, China and Taiwan) are revised taxonomically. Eight species of the subgenus Sunemeroe Iredale, 1930 are recognised: Sunetta beni n.sp., S. crassatelliformis Haga and H. Fukuda, n.sp., S. cumingii E.A. Smith, 1891, S. kirai Huber, 2010, S. langfordi (Habe, 1953), S. menstrualis (Menke, 1843) S. nomurai Haga and H. Fukuda, n.sp., and S. sunettina (Jousseaume, 1891). Although S. beni has long been misidentified as S. solanderii (Gray, 1825) from the Indian Ocean, it is distinguishable from all other Sunemeroe species in having a small, oval and inflated shell with a round posterior end and a broad and deeply sunken escutcheon. Sunetta crassatelliformis is a Lower Pleistocene species endemic to Japan. Another fossil species S. nomurai is known from the Pleistocene of Taiwan. Sunetta cumingii, a little-known Recent species from southwestern Japan and Taiwan, is separable from S. sunettina (= S. contempta E.A. Smith, 1891), which has often been regarded as synonymous. Amongst the six Recent species only S. sunettina is widely distributed in the Indo-West Pacific; the other five have narrower geographical ranges around Japan. Sunetta beni and S. menstrualis are thought to be threatened due to habitat loss.
摘要对日本及其邻近地区(韩国、中国和台湾)的Sunetta Link, 1807的种进行了分类订正。1930年已确认的苏尼塔·贝尼亚属8种;(1)，陈志强，陈志强，等。， S. cumingii E.A. Smith, 1891, S. kirai Huber, 2010, S. langfordi (Habe, 1953)， S. Menke, 1843)， S. nomurai Haga和H. Fukuda, n.p.。S. sunettina (jouseaume, 1891)。尽管贝氏海螺长期以来一直被误认为是来自印度洋的索安德海螺(Gray, 1825)，但它与其他所有日emeroe物种的区别在于，它有一个小的、椭圆形的、膨胀的壳，后端是圆形的，还有一个宽而深凹的盾形纹饰。Sunetta crassatelliformis是日本特有的下更新世种。另一个化石种是台湾更新世的S. nomurai。Sunetta cumingii是一种来自日本西南部和台湾的鲜为人知的近代种，它与S. sunettina (= S. conceta E.A. Smith, 1891)是可分离的，两者通常被认为是同义词。在最近的6种中，只有S. sunettina广泛分布于印度-西太平洋;其他五个在日本周围的地理范围较窄。据认为，由于栖息地的丧失，苏内塔贝尼和月经夜蛾受到了威胁。
{"title":"The bivalve genus Sunetta Link, 1807 (Heterodonta: Veneridae) of Japan and the neighbouring waters – a taxonomic revision with the descriptions of three new species","authors":"H. Fukuda, S. Ishida, Tetsuya Watanabe, S. Yoshimatsu, T. Haga","doi":"10.1080/13235818.2021.1937016","DOIUrl":"https://doi.org/10.1080/13235818.2021.1937016","url":null,"abstract":"ABSTRACT\u0000 Species of Sunetta Link, 1807 from Japan and the neighbouring regions (Korea, China and Taiwan) are revised taxonomically. Eight species of the subgenus Sunemeroe Iredale, 1930 are recognised: Sunetta beni n.sp., S. crassatelliformis Haga and H. Fukuda, n.sp., S. cumingii E.A. Smith, 1891, S. kirai Huber, 2010, S. langfordi (Habe, 1953), S. menstrualis (Menke, 1843) S. nomurai Haga and H. Fukuda, n.sp., and S. sunettina (Jousseaume, 1891). Although S. beni has long been misidentified as S. solanderii (Gray, 1825) from the Indian Ocean, it is distinguishable from all other Sunemeroe species in having a small, oval and inflated shell with a round posterior end and a broad and deeply sunken escutcheon. Sunetta crassatelliformis is a Lower Pleistocene species endemic to Japan. Another fossil species S. nomurai is known from the Pleistocene of Taiwan. Sunetta cumingii, a little-known Recent species from southwestern Japan and Taiwan, is separable from S. sunettina (= S. contempta E.A. Smith, 1891), which has often been regarded as synonymous. Amongst the six Recent species only S. sunettina is widely distributed in the Indo-West Pacific; the other five have narrower geographical ranges around Japan. Sunetta beni and S. menstrualis are thought to be threatened due to habitat loss.","PeriodicalId":18857,"journal":{"name":"Molluscan Research","volume":"41 1","pages":"107 - 171"},"PeriodicalIF":1.0,"publicationDate":"2021-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/13235818.2021.1937016","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44506015","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}
Pub Date : 2021-04-03DOI: 10.1080/13235818.2021.1892474
V. V. Adamova
ABSTRACT The Caucasian snail Harmozica ravergiensis Férussac, 1835 (Gastropoda, Stylommatophora, Hygromiidae) and the Crimean snail Brephulopsis cylindrica Menke, 1828 (Gastropoda, Stylommatophora, Enidae) have been spreading across the northern borders of their ranges in recent years. Here I present a study of the variability of ISSR loci in the populations of H. ravergiensis and B. cylindrica outside their natural range, in the south of the Central Russian Upland (Belgorod Region, Russia). A comparison is made with populations of these snail species in their native area (respectively, the Caucasus and Crimea). Genetic polymorphism is generally at the same level in alien and natural populations of the species. However, in some geographically isolated alien populations, the variability indices are lower than in the native area. The level of genetic differentiation between geographically distant populations indicates different sources of invasion. A high level of genetic differentiation was also detected between native populations. No isolation by distance was found for the Belgorod populations of H. ravergiensis (Mantel test, R2=0.065; P = 0.110). The exchange of migrants between these local populations is probably occurring anthropogenically.
{"title":"Genetic variation in non-indigenous populations of the land snails Harmozica ravergiensis and Brephulopsis cylindrica (Gastropoda: Stylommatophora) in the south of the Central Russian Upland (Eastern Europe)","authors":"V. V. Adamova","doi":"10.1080/13235818.2021.1892474","DOIUrl":"https://doi.org/10.1080/13235818.2021.1892474","url":null,"abstract":"ABSTRACT The Caucasian snail Harmozica ravergiensis Férussac, 1835 (Gastropoda, Stylommatophora, Hygromiidae) and the Crimean snail Brephulopsis cylindrica Menke, 1828 (Gastropoda, Stylommatophora, Enidae) have been spreading across the northern borders of their ranges in recent years. Here I present a study of the variability of ISSR loci in the populations of H. ravergiensis and B. cylindrica outside their natural range, in the south of the Central Russian Upland (Belgorod Region, Russia). A comparison is made with populations of these snail species in their native area (respectively, the Caucasus and Crimea). Genetic polymorphism is generally at the same level in alien and natural populations of the species. However, in some geographically isolated alien populations, the variability indices are lower than in the native area. The level of genetic differentiation between geographically distant populations indicates different sources of invasion. A high level of genetic differentiation was also detected between native populations. No isolation by distance was found for the Belgorod populations of H. ravergiensis (Mantel test, R2=0.065; P = 0.110). The exchange of migrants between these local populations is probably occurring anthropogenically.","PeriodicalId":18857,"journal":{"name":"Molluscan Research","volume":"41 1","pages":"172 - 182"},"PeriodicalIF":1.0,"publicationDate":"2021-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/13235818.2021.1892474","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44930495","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}
Pub Date : 2021-04-03DOI: 10.1080/13235818.2021.1927465
D. Herbert
ABSTRACT A discrepancy between the well-established interpretation and use of the genus-level name Camitia Gray, 1842 and that determined by its currently accepted type species is highlighted. The paradox centres on the true identity of ‘Tr. pulcherrima Gray’ [sic], a name cited by Gray (1847) as the type species of Camitia. One interpretation of this name is that it refers to Trochus pulcherrimus, one of J.E. Gray’s many manuscript names first published by W. Wood in 1828. In which case Camitia is a subjective senior synonym of Prothalotia Thiele, 1930 – an interpretation very much at odds with its current use. Re-evaluation of ‘Tr. pulcherrima Gray’ in the light of the current concept of Camitia suggests that it represents a lapsus calami for Monodonta pulcherrima, another of Gray’s manuscript names, which was not validated until it was figured as Camitia pulcherrima H. Adams & A. Adams, 1854. The latter interpretation serves to preserve the prevailing usage of both Camitia Gray, 1842 and Prothalotia Thiele, 1930. The type species of Camitia Gray, 1842 is shown to be Camitia pulcherrima H. Adams & A. Adams, 1854 by subsequent monotypy.
{"title":"Camitia Gray, 1842 – the identity of its type species (Vetigastropoda: Trochidae)","authors":"D. Herbert","doi":"10.1080/13235818.2021.1927465","DOIUrl":"https://doi.org/10.1080/13235818.2021.1927465","url":null,"abstract":"ABSTRACT A discrepancy between the well-established interpretation and use of the genus-level name Camitia Gray, 1842 and that determined by its currently accepted type species is highlighted. The paradox centres on the true identity of ‘Tr. pulcherrima Gray’ [sic], a name cited by Gray (1847) as the type species of Camitia. One interpretation of this name is that it refers to Trochus pulcherrimus, one of J.E. Gray’s many manuscript names first published by W. Wood in 1828. In which case Camitia is a subjective senior synonym of Prothalotia Thiele, 1930 – an interpretation very much at odds with its current use. Re-evaluation of ‘Tr. pulcherrima Gray’ in the light of the current concept of Camitia suggests that it represents a lapsus calami for Monodonta pulcherrima, another of Gray’s manuscript names, which was not validated until it was figured as Camitia pulcherrima H. Adams & A. Adams, 1854. The latter interpretation serves to preserve the prevailing usage of both Camitia Gray, 1842 and Prothalotia Thiele, 1930. The type species of Camitia Gray, 1842 is shown to be Camitia pulcherrima H. Adams & A. Adams, 1854 by subsequent monotypy.","PeriodicalId":18857,"journal":{"name":"Molluscan Research","volume":"41 1","pages":"103 - 106"},"PeriodicalIF":1.0,"publicationDate":"2021-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/13235818.2021.1927465","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46898391","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}
Pub Date : 2021-04-03DOI: 10.1080/13235818.2021.1927464
C. Drerup
ABSTRACT Bottletail squids (Cephalopoda: Sepiadariidae) spend the daytime buried in sediment; however, their burying behaviour has not yet been described in detail. In the present study, the burying pattern of a single tropical bottletail squid Sepiadarium kochii Steenstrup, 1881 is analysed for different behavioural characteristics. Burying in S. kochii consists of a rapid sequence of strong, alternating forward- and backward directed funnel jets which obscure the individual almost fully with sediment, followed by a single flinging movement of the dorsolateral arm pair to cover the remaining exposed body parts with sand. A comparison of the burying pattern of S. kochii with that of closely related bobtail squids (Cephalopoda: Sepiolidae) is drawn. Moreover, differences between these two cephalopod families in terms of the execution and duration of their burying procedure as well as its behavioural use are discussed.
{"title":"First detailed description of the burying behaviour of a bottletail squid, Sepiadarium kochii Steenstrup, 1881","authors":"C. Drerup","doi":"10.1080/13235818.2021.1927464","DOIUrl":"https://doi.org/10.1080/13235818.2021.1927464","url":null,"abstract":"ABSTRACT Bottletail squids (Cephalopoda: Sepiadariidae) spend the daytime buried in sediment; however, their burying behaviour has not yet been described in detail. In the present study, the burying pattern of a single tropical bottletail squid Sepiadarium kochii Steenstrup, 1881 is analysed for different behavioural characteristics. Burying in S. kochii consists of a rapid sequence of strong, alternating forward- and backward directed funnel jets which obscure the individual almost fully with sediment, followed by a single flinging movement of the dorsolateral arm pair to cover the remaining exposed body parts with sand. A comparison of the burying pattern of S. kochii with that of closely related bobtail squids (Cephalopoda: Sepiolidae) is drawn. Moreover, differences between these two cephalopod families in terms of the execution and duration of their burying procedure as well as its behavioural use are discussed.","PeriodicalId":18857,"journal":{"name":"Molluscan Research","volume":"41 1","pages":"87 - 91"},"PeriodicalIF":1.0,"publicationDate":"2021-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/13235818.2021.1927464","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45990531","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}
Pub Date : 2021-03-16DOI: 10.1080/13235818.2021.1898732
A. Golikov, M. Blicher, H. Hoving, D. Zakharov, R. Sabirov
ABSTRACT Gonatus fabricii (Lichtenstein, 1818) is an ecologically important squid that spends its entire life cycle within the Arctic where it is the most abundant cephalopod. Due to the rarity of mature and reproducing females, it is unknown how many eggs females spawn (actual fecundity). Among 47,000 specimens studied between 2005 and 2019 one spent, degenerated and gelatinous female with a mantle length of 230 mm was caught in West Greenland in 2019. Examination allowed the first detailed description of fecundity and spawning pattern in the species. Oocyte development shows that the most considerable maturation of mid-vitellogenic oocytes to late vitellogenic and then to ripe stages occurs immediately after the first ripe oocytes appear in the ovary. There were no ripe oocytes in the ovary or oviducts. The ovary contained an estimated 6561 oocytes and 2551 post-ovulatory follicles and hence the total fecundity was 9112. This specimen of G. fabricii realised 28.0% of its potential fecundity which is comparable to Berryteuthis magister, which also belongs to Gonatidae, and lower than in the majority of studied deep-sea squids (including other gonatids). Spent females may provide clues as to where the major spawning areas of this abundant but poorly known squid are located.
{"title":"Actual fecundity of the Arctic squid Gonatus fabricii (Cephalopoda) based on the examination of a rarely encountered spent female","authors":"A. Golikov, M. Blicher, H. Hoving, D. Zakharov, R. Sabirov","doi":"10.1080/13235818.2021.1898732","DOIUrl":"https://doi.org/10.1080/13235818.2021.1898732","url":null,"abstract":"ABSTRACT Gonatus fabricii (Lichtenstein, 1818) is an ecologically important squid that spends its entire life cycle within the Arctic where it is the most abundant cephalopod. Due to the rarity of mature and reproducing females, it is unknown how many eggs females spawn (actual fecundity). Among 47,000 specimens studied between 2005 and 2019 one spent, degenerated and gelatinous female with a mantle length of 230 mm was caught in West Greenland in 2019. Examination allowed the first detailed description of fecundity and spawning pattern in the species. Oocyte development shows that the most considerable maturation of mid-vitellogenic oocytes to late vitellogenic and then to ripe stages occurs immediately after the first ripe oocytes appear in the ovary. There were no ripe oocytes in the ovary or oviducts. The ovary contained an estimated 6561 oocytes and 2551 post-ovulatory follicles and hence the total fecundity was 9112. This specimen of G. fabricii realised 28.0% of its potential fecundity which is comparable to Berryteuthis magister, which also belongs to Gonatidae, and lower than in the majority of studied deep-sea squids (including other gonatids). Spent females may provide clues as to where the major spawning areas of this abundant but poorly known squid are located.","PeriodicalId":18857,"journal":{"name":"Molluscan Research","volume":"41 1","pages":"83 - 86"},"PeriodicalIF":1.0,"publicationDate":"2021-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/13235818.2021.1898732","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42750441","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}
Pub Date : 2021-03-13DOI: 10.1080/13235818.2021.1898715
Fariba Farzadfar, B. Doustshenas, A. Rezaie, S. Mousavi
ABSTRACT Solen dactylus is one of the most common razor clams in the tidal zone in the western Indian Ocean and Persian Gulf. Habitats of these clams may be subject to salinity fluctuations due to high evaporation and heavy rainfall. To assess their adaptation, in the laboratory clams were placed in 50-litre tanks with 40 cm depth of natural substrate and were kept in salinity of 45 ppt for a week before subsequent experiments. They were then exposed to salinities of 5, 20, 35, 45 and 65 ppt for three weeks. Concentrations of Na+, Cl–, K+, Ca2+, and Mg2+, as well as osmolality in the haemolymph and tank water were measured at 1, 24, 72 h, one week and three weeks after the start of the experiment. Haemolymph Na+ and Cl– values followed the concentrations of the external medium so that they decreased at low salinities and increased at high salinities. The Ca2+, Mg2+ and K+ ions all showed a common pattern, and their trend was independent of the external environment. Histopathological analysis showed severe tissue damage at low salinities with expanded intercellular spaces, an increase of intracytoplasmic vacuoles in the digestive tubules, and necrosis and destruction of lamellae in gill tissues.
{"title":"Salinity induced alterations in ionic concentration of haemolymph and its effects on histopathology of gills and digestive gland in razor clam (Solen dactylus von Cosel, 1989; Bivalvia, Solenidae)","authors":"Fariba Farzadfar, B. Doustshenas, A. Rezaie, S. Mousavi","doi":"10.1080/13235818.2021.1898715","DOIUrl":"https://doi.org/10.1080/13235818.2021.1898715","url":null,"abstract":"ABSTRACT Solen dactylus is one of the most common razor clams in the tidal zone in the western Indian Ocean and Persian Gulf. Habitats of these clams may be subject to salinity fluctuations due to high evaporation and heavy rainfall. To assess their adaptation, in the laboratory clams were placed in 50-litre tanks with 40 cm depth of natural substrate and were kept in salinity of 45 ppt for a week before subsequent experiments. They were then exposed to salinities of 5, 20, 35, 45 and 65 ppt for three weeks. Concentrations of Na+, Cl–, K+, Ca2+, and Mg2+, as well as osmolality in the haemolymph and tank water were measured at 1, 24, 72 h, one week and three weeks after the start of the experiment. Haemolymph Na+ and Cl– values followed the concentrations of the external medium so that they decreased at low salinities and increased at high salinities. The Ca2+, Mg2+ and K+ ions all showed a common pattern, and their trend was independent of the external environment. Histopathological analysis showed severe tissue damage at low salinities with expanded intercellular spaces, an increase of intracytoplasmic vacuoles in the digestive tubules, and necrosis and destruction of lamellae in gill tissues.","PeriodicalId":18857,"journal":{"name":"Molluscan Research","volume":"41 1","pages":"92 - 102"},"PeriodicalIF":1.0,"publicationDate":"2021-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/13235818.2021.1898715","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44191287","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}
Pub Date : 2021-01-02DOI: 10.1080/13235818.2020.1861681
H. MacIntosh, J. Voight
ABSTRACT Recent advances in sampling capabilities have enabled some of the first large-scale bathyal and abyssal surveys in Australian waters, allowing new insights into the deep-sea invertebrate fauna of the region. Here we describe Abditoconus investigatoris n. sp., the first xylophagaid described from Australia in 60 years. Abitoconus investigatoris is characterised by a siphon with distinct proximal and distal portions, with a prominent wrinkled ventral band on the proximal portion. This species was also observed with epizoic ciliates (fam. Vorticellidae), the first known association of ciliates and xylophagaids.
{"title":"Deep-sea wood-boring bivalves (Xylophagaidae) from southeast Australia, with a new species described","authors":"H. MacIntosh, J. Voight","doi":"10.1080/13235818.2020.1861681","DOIUrl":"https://doi.org/10.1080/13235818.2020.1861681","url":null,"abstract":"ABSTRACT Recent advances in sampling capabilities have enabled some of the first large-scale bathyal and abyssal surveys in Australian waters, allowing new insights into the deep-sea invertebrate fauna of the region. Here we describe Abditoconus investigatoris n. sp., the first xylophagaid described from Australia in 60 years. Abitoconus investigatoris is characterised by a siphon with distinct proximal and distal portions, with a prominent wrinkled ventral band on the proximal portion. This species was also observed with epizoic ciliates (fam. Vorticellidae), the first known association of ciliates and xylophagaids.","PeriodicalId":18857,"journal":{"name":"Molluscan Research","volume":"41 1","pages":"16 - 25"},"PeriodicalIF":1.0,"publicationDate":"2021-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/13235818.2020.1861681","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47242040","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}
Pub Date : 2021-01-02DOI: 10.1080/13235818.2020.1865515
R. Willan, Nikolina Nenadic, A. Ramage, C. McDougall
ABSTRACT Between September 2019 and February 2020, four separate discoveries of populations of a large rock oyster in the wild (albeit in anthropogenically modified habitats) in northern Queensland prompted a molecular and morphological investigation to determine the identity of the species. Sequencing of partial mitochondrial 16S, mitochondrial cytochrome oxidase I, and histone H3 genes of specimens from four sites spanning some 170 km demonstrates that their sequences match those for Magallana bilineata (Röding, 1798), a species not previously recorded from Australia. Given its large size and onshore habitat, it is most likely that M. bilineata is exotic to Australia and has been introduced recently; however its origin is difficult to ascertain because it is widespread (both naturally and through translocation for aquaculture) in the tropical Indo-Pacific Ocean. Given that, as with any non-native invading marine species, M. bilineata is deemed to be ‘Prohibited Matter’ under the Queensland Biosecurity Act 2014, it is being monitored by Biosecurity Queensland to determine if the establishment is permanent and if intervention by biosecurity agencies is feasible or would be effective.
{"title":"Detection and identification of the large, exotic, crassostreine oyster Magallana bilineata (Röding, 1798) in northern Queensland, Australia","authors":"R. Willan, Nikolina Nenadic, A. Ramage, C. McDougall","doi":"10.1080/13235818.2020.1865515","DOIUrl":"https://doi.org/10.1080/13235818.2020.1865515","url":null,"abstract":"ABSTRACT Between September 2019 and February 2020, four separate discoveries of populations of a large rock oyster in the wild (albeit in anthropogenically modified habitats) in northern Queensland prompted a molecular and morphological investigation to determine the identity of the species. Sequencing of partial mitochondrial 16S, mitochondrial cytochrome oxidase I, and histone H3 genes of specimens from four sites spanning some 170 km demonstrates that their sequences match those for Magallana bilineata (Röding, 1798), a species not previously recorded from Australia. Given its large size and onshore habitat, it is most likely that M. bilineata is exotic to Australia and has been introduced recently; however its origin is difficult to ascertain because it is widespread (both naturally and through translocation for aquaculture) in the tropical Indo-Pacific Ocean. Given that, as with any non-native invading marine species, M. bilineata is deemed to be ‘Prohibited Matter’ under the Queensland Biosecurity Act 2014, it is being monitored by Biosecurity Queensland to determine if the establishment is permanent and if intervention by biosecurity agencies is feasible or would be effective.","PeriodicalId":18857,"journal":{"name":"Molluscan Research","volume":"41 1","pages":"64 - 74"},"PeriodicalIF":1.0,"publicationDate":"2021-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/13235818.2020.1865515","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49332525","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}
Pub Date : 2021-01-02DOI: 10.1080/13235818.2021.1882924
A. Mansingh, Antaryami Pradhan, N. J. Ekka
ABSTRACT The objective of this study was to determine the structure and composition of the molluscan community in two different intertidal profiles of the Bhitarkanika mangrove ecosystem of Odisha. Investigations on four study stations revealed the occurrence of 37 molluscan species represented by 25 gastropods and 12 bivalves. The comparative assessment demonstrated that molluscan species assemblage and diversity varied in the two different intertidal profiles with significantly higher abundance (P-value = 2.912e-11) at the mid-intertidal zone than the high intertidal zone. The species accumulation curve also indicates higher species accumulation in the mid intertidal zone as compared to the high intertidal zone. The two different zones were also found to differ significantly in physico-chemical parameters. Taken together, the observations demonstrated that hydrological and soil environmental conditions such as salinity, temperature, pH, electron conductivity and soil biomass carbon may influence the dispersion and distribution of benthic molluscan faunal assemblages among different mangrove habitats. The results highlighted the need for long-term studies and perspective when evaluating conservation practices in mangrove ecosystems.
{"title":"Distribution, diversity and abundance of molluscs in the intertidal profile of the Bhitarkanika mangrove ecosystem","authors":"A. Mansingh, Antaryami Pradhan, N. J. Ekka","doi":"10.1080/13235818.2021.1882924","DOIUrl":"https://doi.org/10.1080/13235818.2021.1882924","url":null,"abstract":"ABSTRACT The objective of this study was to determine the structure and composition of the molluscan community in two different intertidal profiles of the Bhitarkanika mangrove ecosystem of Odisha. Investigations on four study stations revealed the occurrence of 37 molluscan species represented by 25 gastropods and 12 bivalves. The comparative assessment demonstrated that molluscan species assemblage and diversity varied in the two different intertidal profiles with significantly higher abundance (P-value = 2.912e-11) at the mid-intertidal zone than the high intertidal zone. The species accumulation curve also indicates higher species accumulation in the mid intertidal zone as compared to the high intertidal zone. The two different zones were also found to differ significantly in physico-chemical parameters. Taken together, the observations demonstrated that hydrological and soil environmental conditions such as salinity, temperature, pH, electron conductivity and soil biomass carbon may influence the dispersion and distribution of benthic molluscan faunal assemblages among different mangrove habitats. The results highlighted the need for long-term studies and perspective when evaluating conservation practices in mangrove ecosystems.","PeriodicalId":18857,"journal":{"name":"Molluscan Research","volume":"41 1","pages":"7 - 15"},"PeriodicalIF":1.0,"publicationDate":"2021-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/13235818.2021.1882924","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46137369","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}
Pub Date : 2021-01-02DOI: 10.1080/13235818.2021.1882925
F. Espinosa, A. Pavón-Paneque, J. García-Gómez
ABSTRACT Limpets are keystone species worldwide, promoting marine biodiversity in coastal areas. Of special concern are the so-called giant limpets such as Patella ferruginea, either due to their role in marine ecosystems and/or threatened status. The proliferation of artificial substrata caused by human population growth has allowed their use as a surrogate habitat for many species of limpets. However, little is known about the impact on the trophic ecology of these species caused by artificial substrata. The stable isotope approach has been widely used to explore the trophic ecology of marine species and so was used in the present study of P. ferruginea. The results of this study indicated that diet consumption differs between artificial and natural substrata for P. ferruginea. Enrichment in δ15N values of specimens collected within the harbour of Ceuta indicates that this endangered species would be a useful indicator for detecting anthropogenically derived organic matter in coastal areas. Further research is required to evaluate the impact of artificial substrata from a conservational perspective.
{"title":"Disentangling the impact of artificial substrata on the trophic ecology of the highly endangered marine invertebrate Patella ferruginea Gmelin, 1791","authors":"F. Espinosa, A. Pavón-Paneque, J. García-Gómez","doi":"10.1080/13235818.2021.1882925","DOIUrl":"https://doi.org/10.1080/13235818.2021.1882925","url":null,"abstract":"ABSTRACT Limpets are keystone species worldwide, promoting marine biodiversity in coastal areas. Of special concern are the so-called giant limpets such as Patella ferruginea, either due to their role in marine ecosystems and/or threatened status. The proliferation of artificial substrata caused by human population growth has allowed their use as a surrogate habitat for many species of limpets. However, little is known about the impact on the trophic ecology of these species caused by artificial substrata. The stable isotope approach has been widely used to explore the trophic ecology of marine species and so was used in the present study of P. ferruginea. The results of this study indicated that diet consumption differs between artificial and natural substrata for P. ferruginea. Enrichment in δ15N values of specimens collected within the harbour of Ceuta indicates that this endangered species would be a useful indicator for detecting anthropogenically derived organic matter in coastal areas. Further research is required to evaluate the impact of artificial substrata from a conservational perspective.","PeriodicalId":18857,"journal":{"name":"Molluscan Research","volume":"41 1","pages":"41 - 45"},"PeriodicalIF":1.0,"publicationDate":"2021-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/13235818.2021.1882925","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43788252","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}
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