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Cephalopods Classification Using Fine Tuned Lightweight Transfer Learning Models
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作者 P.Anantha Prabha G.Suchitra R.Saravanan 《Intelligent Automation & Soft Computing》 SCIE 2023年第3期3065-3079,共15页
Cephalopods identification is a formidable task that involves hand inspection and close observation by a malacologist.Manual observation and iden-tification take time and are always contingent on the involvement of expe... Cephalopods identification is a formidable task that involves hand inspection and close observation by a malacologist.Manual observation and iden-tification take time and are always contingent on the involvement of experts.A system is proposed to alleviate this challenge that uses transfer learning techni-ques to classify the cephalopods automatically.In the proposed method,only the Lightweight pre-trained networks are chosen to enable IoT in the task of cephalopod recognition.First,the efficiency of the chosen models is determined by evaluating their performance and comparing thefindings.Second,the models arefine-tuned by adding dense layers and tweaking hyperparameters to improve the classification of accuracy.The models also employ a well-tuned Rectified Adam optimizer to increase the accuracy rates.Third,Adam with Gradient Cen-tralisation(RAdamGC)is proposed and used infine-tuned models to reduce the training time.The framework enables an Internet of Things(IoT)or embedded device to perform the classification tasks by embedding a suitable lightweight pre-trained network.Thefine-tuned models,MobileNetV2,InceptionV3,and NASNet Mobile have achieved a classification accuracy of 89.74%,87.12%,and 89.74%,respectively.Thefindings have indicated that thefine-tuned models can classify different kinds of cephalopods.The results have also demonstrated that there is a significant reduction in the training time with RAdamGC. 展开更多
关键词 cephalopods transfer learning lightweight models classification deep learning fish IOT
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Morphologies of Eumelanins from the Ink of Six Cephalopods Species Measured by Atomic Force Microscopy
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作者 SUN Yulin TIAN Li +6 位作者 WEN Jing ZHAO Juan ZHANG Wei XIE Chunyao ZHOU Meiqing QIU Xiaoying CHEN Daohai 《Journal of Ocean University of China》 SCIE CAS CSCD 2017年第3期461-467,共7页
The morphologies of eumelanin, isolated from the six cephalopods species Sepia esculenta, Sepia lycidas, Sepia pharaonis, Sepiella japonica, Euprymna berryi, and Uroteuthis(Photololigo) edulis, were investigated using... The morphologies of eumelanin, isolated from the six cephalopods species Sepia esculenta, Sepia lycidas, Sepia pharaonis, Sepiella japonica, Euprymna berryi, and Uroteuthis(Photololigo) edulis, were investigated using atomic force microscopy(AFM). The results showed that the hierarchical aggregate structures of irregular spherical particles with different diameters are the common characteristics of these eumelanins. Furthermore, the diameters of these spherical particles present an uneven distribution in a wide range and mainly concentrate in the range of about 20-150 nm. In addition, the eumelanin from different cephalopods species show obvious differences in the morphologies, which is illustrated by different assembly forms of diverse aggregate units and the quantitative features of eumelanin particles derived from the images. 展开更多
关键词 eumelanins cephalopods morphology atomic force microscopy
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Comparative Taxonomical Studies on the Egyptian Red Sea Cephalopods (Cephalopoda: Mollusca)
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作者 Rafik Riad 《Open Journal of Marine Science》 2022年第3期61-82,共22页
Cephalopods are known to be commercially important around the world. Worth mentioning it constitutes a major part of the Egyptian fishing industry. Samples of cephalopods were collected from fishing boats in the Suez ... Cephalopods are known to be commercially important around the world. Worth mentioning it constitutes a major part of the Egyptian fishing industry. Samples of cephalopods were collected from fishing boats in the Suez Gulf and Egyptian Red Sea. Cuttlefishes, squids, and octopuses had their club of the tentacle, arm IV hectocotylus, sucker of the club of the tentacle, sucker ring of the club of the tentacle, arm sucker, arm sucker ring, radula, gill, and shell. Various organs were photographed using a Canon G7X digital Camera. Eleven Egyptian Red Sea cephalopod species were encountered;three of them are cuttlefish species namely: Sepia dollfusi, Sepia pharaonis, and Sepia elongata. Three squid species namely: Loligo forbesii, Uroteuthis Photololigo duvaucelii, and Sepioteuthis lessoniana were also encountered. Five octopus species were also recorded namely: Octopus vulgaris, Callistoctopus macropus, Macrotritopus defilippi, Amphyoctopus aegina, and Amphyoctopus membranaceus. Aims of the current work are to differentiate between some Cephalopod species living in the Red Sea of Egypt and evaluate the status to achieve a reliable differentiation between these species. 展开更多
关键词 Comparative cephalopods EGYPTIAN Red Sea TAXONOMY
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Identification and Expression Profile of a Neuropeptide LFRFamide-Like Gene During Different Stages of Gonadal Development in the Cephalopod Sepia pharaonis
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作者 QIU Jiayin SUN Lianlian +3 位作者 LI Shuang ZHOU Xu CHI Changfeng ZHENG Libing 《Journal of Ocean University of China》 CAS CSCD 2024年第2期499-508,共10页
Neuropeptides are widely distributed in vertebrates and invertebrates,regulating a variety of physiological activities in the organisms,such as metabolism,feeding and reproduction.In this study,to explore the function... Neuropeptides are widely distributed in vertebrates and invertebrates,regulating a variety of physiological activities in the organisms,such as metabolism,feeding and reproduction.In this study,to explore the function of neuropeptide LFRFamide in Sepia pharaonis,the full-length cDNA of LFRFamide-like gene(named SpLFRFL,MG869822.1)was identified with rapid amplification of cDNA ends(RACE)method.The sequence of SpLFRFL was 860 bp in length and encoded 188 amino acids containing 4 different mature peptides:1 copy of PHTPFRFamide,NSLFRFamide,TIFRFamide,and 3 copies of GNLFRFamide.Multiple alignment and phylogenetic analysis results showed that SpLFRFL shared high identity with LFRFamides of Sepia officinalis and Sepiella japonica and had the closest relationship with them.Through quantitative Real-time PCR(qRT-PCR),it was found that the SpLFRFL gene was highly expressed in the optic lobe and brain at three different stages during gonad development in both genders.Moreover,the four mature peptides at a concentration of 0.01μmol L^(−1) could inhibit the protein synthesis in the Chinese hamster ovary cell strain-K1(CHOK1)induced by SpGnRH.These data suggest that SpLFRFL might be involved in the development and reproduction of S.pharaonis.The results can contribute to future studies on neuropeptide evolution and function and benefit the cuttlefish farming. 展开更多
关键词 NEUROPEPTIDE LFRFamide-like CEPHALOPOD CUTTLEFISH Sepia pharaonis development REPRODUCTION
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Hearing characteristics of cephalopods: Modeling and environmental impact study 被引量:2
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作者 Yunfeng ZHANG Feng SHI +2 位作者 Jiakun SONG Xugang ZHANG Shiliang YU 《Integrative Zoology》 SCIE CSCD 2015年第1期141-151,共11页
Cephalopods(octopus,squid and cuttlefish)are some of the most intriguing molluscs,and they represent economically important commercial marine species for fisheries.Previous studies have shown that cephalopods are sens... Cephalopods(octopus,squid and cuttlefish)are some of the most intriguing molluscs,and they represent economically important commercial marine species for fisheries.Previous studies have shown that cephalopods are sensitive to underwater particle motion,especially at low frequencies in the order of 10 Hz.The present paper deals with quantitative modeling of the statocyst system in three cephalopod species:Octopus vulgaris,Sepia officinalis and Loligo vulgaris.The octopus’s macula/statolith organ was modeled as a 2nd-order dynamic oscillator using parameter values estimated from scanning electron micrograph images.The modeling results agree reasonably well with experimental data(acceleration threshold)in the three cephalopod species.Insights made from quantitative modeling and simulating the particle motion sensing mechanism of cephalopods elucidated their underwater particle motion detection capabilities.Sensitivity to emerging environmental issues,such as low frequency noise caused by near-shore wind farms and increasing levels of carbon dioxide in the ocean,and sensitivity to sounds produced by impending landslides were investigated in octopus using the model. 展开更多
关键词 CEPHALOPOD hearing threshold OCTOPUS particle motion
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Phylogeny of the cuttlefishes (Mollusca: Cephalopoda) based on mitochondrial COI and 16S rRNA gene sequence data 被引量:11
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作者 LINXiangzhi ZHENGXiaodong +1 位作者 XIAOShu WANGRucai 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2004年第4期699-707,共9页
To clarify cuttlefish phylogeny, mitochondrial cytochrome c oxidase subunit I (COI) gene and partial 16S rRNA geneare sequenced for 13 cephalopod species. Phylogenetic trees are constructed, with the neighbor-joining ... To clarify cuttlefish phylogeny, mitochondrial cytochrome c oxidase subunit I (COI) gene and partial 16S rRNA geneare sequenced for 13 cephalopod species. Phylogenetic trees are constructed, with the neighbor-joining method.Coleoids are divided into two main lineages, Decabrachia and Octobrachia. The monophyly of the order Sepioidea,which includes the families Sepiidae, Sepiolidae and Idiosepiidae , is not supported. From the two families ofSepioidea examined, the Sepiolidae are polyphyletic and are excluded from the order. On the basis of 16S rRNA andamino acid of COI gene sequences data, the two genera (Sepiella and Sepia) from the Sepiidae can be distinguished, butdo not have a visible boundary using COI gene sequences. The reason is explained. This suggests that the 16S rDNAof cephalopods is a precious tool to analyze taxonomic relationships at the genus level, and COI gene is fitter at ahigher taxonomic level (i.e., family). 展开更多
关键词 PHYLOGENY cephalopods CUTTLEFISH COI 16S rRNA
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Replacements of Major Cephalopod Faunas in Late Cambrian and Ordovician in South China 被引量:2
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作者 FANG Xiang LI Wenjie +2 位作者 ZHANG Yuandong ZHANG Yunbai CHEN Tingen 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2019年第S01期102-105,共4页
1 Introduction As one of the major groups in the Great Ordovician Biodiversification Event(GOBE),cephalopods may have played a critical role in the marine ecosystem in late Cambrian and Ordovician.Among the few predat... 1 Introduction As one of the major groups in the Great Ordovician Biodiversification Event(GOBE),cephalopods may have played a critical role in the marine ecosystem in late Cambrian and Ordovician.Among the few predators in the Ordovician,cephalopods are typified by their big sizes and the development of swimming ability. 展开更多
关键词 faunal replacement cephalopods diversity South China GREAT ORDOVICIAN Biodiversification Event(GOBE)
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Growth and Distribution of Amphioctopus fangsiao(d'Orbigny, 1839–1841) in Haizhou Bay, Yellow Sea 被引量:2
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作者 PANG Yumeng TIAN Yongjun +2 位作者 FU Caihong REN Yiping WAN Rong 《Journal of Ocean University of China》 SCIE CAS CSCD 2020年第5期1125-1132,共8页
Octopus fisheries have prospered in many areas of the world ocean over the last six decades. Despite degradation and overexploitation of Chinese coastal ecosystems, octopus has become a stable Chinese domestic fishery... Octopus fisheries have prospered in many areas of the world ocean over the last six decades. Despite degradation and overexploitation of Chinese coastal ecosystems, octopus has become a stable Chinese domestic fishery species. Among the octopus species in the Bohai and Yellow, East and South China Seas, Amphioctopus fangsiao(d'Orbigny [in Férussac & d'Orbigny], 1839–1841) plays an increasingly important role both economically and ecologically. However, no systematic research has been conducted on its biology and population dynamics in the China Seas. In this study, we characterized the growth and distribution of A. fangsiao in Haizhou Bay, Yellow Sea based on four years of trawl survey data. As the results, A. fangsiao is characterized by allometric growth and an overall sex ratio of 0.97 with a slight male bias. Small octopus can be observed through a whole year, suggesting that A. fangsiao may have an extended or continuous spawning season. A. fangsiao may migrate short distances along with seasonal changes and coastal currents, considering they overwinter in the offshore water and spawn in the inshore water. In addition to fishing pressure, annual variations in the population structure and biomass appeared to be influenced by ambient water temperature. These results provide basic biological information for a better understanding of the population dynamics and the ecological importance of A. fangsiao. 展开更多
关键词 Amphioctopus fangsiao CEPHALOPOD Haizhou Bay GROWTH spatial distribution
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Ordovician Cephalopod Biofacies of South China and Its Provincialization 被引量:1
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作者 肖传桃 陈志勇 +1 位作者 刘莉 何幼斌 《Journal of China University of Geosciences》 SCIE CSCD 2006年第3期221-230,共10页
The research on biofacies and its provincialization is of important significance not only for the increasing of precision of stratigraphic subdivision and correlation in South China, the reconstruction of ancient envi... The research on biofacies and its provincialization is of important significance not only for the increasing of precision of stratigraphic subdivision and correlation in South China, the reconstruction of ancient environment and paleogeography and even the guiding of oil and gas exploration, but also for the study of paleobiogeogrphy and sea level changes of southern China in Ordovician. On the basis of the studies of the ecological characteristics of Ordovician cephalopods from South China, eighteen cephalopod biofacies are recognized and described : (1) Open platform Proterocameroceras biofacies ; (2) Restricted platform Pseudoectenolites-Xiadongoceras biofacies; ( 3 ) Open platform Retroclitendoceras- Pararetroclitendoceras biofacies; (4) Open platform Pronajaceras-Mamagouceras biofacies ; (5) Shelf slope-basin Cyclostomiceras biofacies; (6) Open platform Cameroceras-Cyrtovaginoceras biofacies; (7) Open platform Coreanoceras-Manchuroceras biofacies; (8) Shelf slope-basin Kaipingoceras- Kyminoceras biofacies; (9) Inner shelf Bathmoceras-Protocycloceras biofacies; (10) Middle shelf Dideroceras-Ancistroceras biofacies; (11) Deep-water shelf Lituites-Cyclolituites biofacies ; (12) Stag- nant basin Lituites-Trilacinoceras biofacies; (13) Deep-water basin Paraendoceras-Sactorthoceras biofacies; (14) Deep-water shelf Sinoceras-Michelinoceras-Disoceras biofacies; (15) Deep-water shelf Beloitoceros-Jiangshanoceras biofacies; (16) Deep-water shelf-basin Eurasiaticoceras biofacies; ( 17 ) Shelf-slope Jiangxiceras-Yushanoceras biofacies; (18) Deep-water basin Michelinoceras biofacies. The cephalopods of these biofacies, their ecological characteristics, and living conditions are elucidated in this article. The association law of cephalopod biofacies in time and space shows that there were three cephalopod biofacies provinces in South China during the Ordovician, i.e. , Yangtze biofacies province, East Guizhou (贵州)-West Hunan (湖南) biofacies province (mixed-type biofacies province), and Central Hunan-West Zhejiang (浙江) biofacies province. It is suggested that differentiation of cephalopod biofacies was mainly controlled by sea level changes and tectonic evolution. The differentiation is obvious during lower sea level and not developed during high sea level. 展开更多
关键词 cephalopod biofacies cephalopod biofacies province sea level changes ORDOVICIAN South China.
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Campanian Climatic Change:Isotopic Evidence from Far East,North America,North Atlantic and Western Europe
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作者 Yuri D. ZAKHAROV Yasunari SHIGETA +6 位作者 Kazushige TANABE Yasuhiro IBA Olga P. SMYSHLYAEVA Ekaterina A. SOKOLOVA Alexander M. POPOV Tatiana A. VELIVETSKAYA Tamara B. AFANASYEVA 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2007年第6期1049-1069,共21页
Paleoclimatic settings have been reconstructed for the Campanian using original oxygenisotopic analyses of well-preserved molluskan and foraminifera shells from Russian Far East, Hokkaido, USA, Belgium and some DSDP h... Paleoclimatic settings have been reconstructed for the Campanian using original oxygenisotopic analyses of well-preserved molluskan and foraminifera shells from Russian Far East, Hokkaido, USA, Belgium and some DSDP holes (95, 98, 102, 390A, and 392A) in North Atlantic. Early Early Campanian climatic optimum has been recognized from data on high bottom shelf water paleotemperatures in middle latitudes of both the western circum-Pacific (to 24.2℃) and the eastern circum-Pacific (to 26.4℃) areas and high bottom shallow water paleotemperatures in high latitudes of the Koryak Upland (22.4-25.5℃), which agrees with the data on the Campanian Barykovskaya flora in high latitudes (Golovneva and Herman, 1998) and Jonker flora and its equivalents in middle latitudes. Judging from the data on comparatively high bottom shallow water paleotemperature values in high latitudes, South Alaska (19.4℃) and the Koryak Upland (22.4-25.5℃), we also expect Latest Campauian temperature maximum, which has not been confirmed, however, for low and middle latitudes by neither of isotopic nor paleobotanic data now. Main dimatic tendency during the Campanian (with the exception of Latest Campanian) has been learned from isotopic composition of Campanian aragonitic ammonoid shells from the Hokkaido-South Sakhalin (Krilyon) marine basin. In contrary to Huber's et al. (2002) assumption, we expect warm greenhouse conditions during the most part of the Campanian. 展开更多
关键词 isotopic data CEPHALOPOD bivalve and gastropod mollusks paleotemperatures Campanian SAKHALIN HOKKAIDO Koryak Upland North America Netherlands Atlantic
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Biogenic amines in fresh fish and fishery products and emerging control
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作者 Abimannan Arulkumar Spiros Paramithiotis Sadayan Paramasivam 《Aquaculture and Fisheries》 CSCD 2023年第4期431-450,共20页
Occurrence of biogenic amines in fresh fish and fishery products constitute a significant safety concern.Ingestion of histamine is identified as the causative agent of several food poisoning incidences on an annual ba... Occurrence of biogenic amines in fresh fish and fishery products constitute a significant safety concern.Ingestion of histamine is identified as the causative agent of several food poisoning incidences on an annual basis.In addition,cadaverine,putrescine and tyramine have been recognized as potentiators of histamine poisoning.Accumulation of biogenic amines in fresh fish and fishery products has been mainly attributed to growth of bacteria possessing amino acid decarboxylase activity,which is facilitated by lack of hygienic conditions and strict temperature control during their storage.To this end,the effectiveness of traditional and modern approaches to control biogenic amine accumulation has been in the epicenter of intensive study.The aim of the present review article is to update and integrate current knowledge regarding the biogenic amine content of fresh fish and fishery products as well as the capacity of traditional and emerging control strategies. 展开更多
关键词 Fresh fish cephalopods Crustaceans SHELLFISH HISTAMINE
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