scholarly journals Sea catfishes (Ariidae) feeding on freshwater floodplains of northern Australia

2020 ◽  
Vol 71 (12) ◽  
pp. 1628
Author(s):  
Bradley J. Pusey ◽  
Timothy D. Jardine ◽  
Stuart E. Bunn ◽  
Michael M. Douglas
Keyword(s):  
Good Condition ◽  
Isotope Analysis ◽  
Stomach Content Analysis ◽  
Freshwater Species ◽  
Wet Season ◽  
Life History Stages ◽  
Estuarine Fishes ◽  
Marine Habitats ◽  
Temporary Habitat ◽  
Isotope Analyses

Flooding of the terminal floodplains of northern Australian rivers provides a greatly expanded, productive habitat accessed by both freshwater and estuarine fishes. This study aimed to determine the extent to which sea catfishes (Ariidae) make use of floodplains and the reasons for doing so (i.e. spawning, feeding). Nine species were collected from floodplains and adjacent distributaries of the Mitchell and Flinders rivers; floodplain use was largely restricted to freshwater species. Evidence of prior wet season spawning was recorded for some species, and mesenteric lipid deposits indicated that fish were in good condition. However, little evidence of spawning on floodplains was found. Stomach content analysis and stable isotope analysis indicated dietary partitioning, particularly between freshwater and estuarine species, but also within freshwater species, and indicated that some species were responsive to variations in food availability. Isotope analyses suggest extensive movement between freshwater, estuarine and marine habitats at different life history stages for the catfish assemblage studied. Terminal floodplains of northern Australian rivers provide important temporary habitat for adult sea catfishes to feed upon, but do not appear to be used as spawning grounds.

scholarly journals Fine-scale population structure and ecotypes of anadromous Hilsa shad (Tenualosa ilisha) across complex aquatic ecosystems revealed by NextRAD genotyping

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Md Asaduzzaman ◽  
Md A. Wahab ◽  
Md J. Rahman ◽  
Md Nahiduzzzaman ◽  
Malcom W. Dickson ◽  
...  
Keyword(s):  
Aquatic Ecosystems ◽  
Population Genomics ◽  
Nucleotide Polymorphism ◽  
Single Nucleotide ◽  
Local Adaptations ◽  
Life History Stages ◽  
Marine Habitats ◽  
Scale Population ◽  
Tenualosa Ilisha ◽  
Conservation And Management

Abstract The anadromous Hilsa shad (Tenualosa ilisha) live in the Bay of Bengal and migrate to the estuaries and freshwater rivers for spawning and nursing of the juveniles. This has led to two pertinent questions: (i) do all Hilsa shad that migrate from marine to freshwater rivers come from the same population? and (ii) is there any relationship between adults and juveniles of a particular habitat? To address these questions, NextRAD sequencing was applied to genotype 31,276 single nucleotide polymorphism (SNP) loci for 180 individuals collected from six strategic locations of riverine, estuarine and marine habitats. FST OutFLANK approach identified 14,815 SNP loci as putatively neutral and 79 SNP loci as putatively adaptive. We observed that divergent local adaptations in differing environmental habitats have divided Hilsa shad into three genetically structured ecotypes: turbid freshwater (Western Riverine), clear freshwater (Eastern Riverine) and brackish-saline (Southern Estuarine-Marine). Our results also revealed that genes involved in neuronal activity may have facilitated the juveniles’ Hilsa shad in returning to their respective natal rivers for spawning. This study emphasized the application of fundamental population genomics information in strategizing conservation and management of anadromous fish such as Hilsa shad that intersect diverse ecotypes during their life-history stages.

scholarly journals Sources Identification of Nitrogen Using Major Ions and Isotopic Tracers in Shenyang, China

Geofluids ◽  
2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Huan Huang ◽  
Mingzhu Liu ◽  
Junjie Wang ◽  
Jiangtao He ◽  
Honghan Chen
Keyword(s):  
Surface Water ◽  
Major Ions ◽  
Quantitative Information ◽  
Wet Season ◽  
Isotopic Tracers ◽  
Shenyang City ◽  
Hun River ◽  
Reducing Environment ◽  
Isotope Analyses ◽  
Iron And Manganese

Stable isotopes are natural tracers that can provide quantitative information about the surface water/groundwater interactions and sources of pollutants in water. In this study, we measured δ18Owater and δ2Hwater and δ18Onitrate and δ15Nnitrate of the samples from the Hun River and groundwater in Shenyang City, China, where the water from the Hun River has a strong discharge and recharge connection with the groundwater. δ18Owater and δ2Hwater were used to determine the amount of surface water that was discharged into groundwater, while δ18Onitrate and δ15Nnitrate were employed to determine the sources of nitrate and ammonium in groundwater, which are the main contaminants in the study area. The reducing environment in groundwater may result from the prevailing iron and manganese, occurring from weathering of minerals and rocks, which prevents the ammonium being oxidized into nitrate. Results show that the amount of recharge from the Hun River into groundwater accounts for around 55.56–86.60% of the total groundwater in the dry season, and the ratio changed to 30.97–63.79% in the wet season. Multiproxy analysis (stable isotope analyses in combination with chemical and hydrogeological data of the study area) indicates that human activities, such as manure and sewage discharge, are the prevailing source of nitrogen in the waters.

scholarly journals First isotope analysis and new radiocarbon dating of Trypillia (Tripolye) farmers from Verteba Cave, Bilche Zolote, Ukraine

2018 ◽  
Vol 44 ◽  
pp. 306-325 ◽  
Author(s):  
Malcolm C. Lillie ◽  
Chelsea E. Budd ◽  
Inna D. Potekhina ◽  
Douglas Price ◽  
Mykhailo Sokhatsky ◽  
...  
Keyword(s):  
Isotope Analysis ◽  
C4 Plant ◽  
Hunting And Gathering ◽  
Animal Remains ◽  
Western Ukraine ◽  
Absolute Dating ◽  
Scythian Period ◽  
C 50 ◽  
Culture Sequence ◽  
Isotope Analyses

This paper presents an analysis of human and animal remains from Verteba cave, near Bilche Zolote, western Ukraine. This study was prompted by a paucity of direct dates on this material and the need to contextualise these remains in relation both to the transition from hunting and gathering to farming in Ukraine, and their specific place within the Cucuteni-Trypillia culture sequence. The new absolute dating places the remains studied here in Trypillia stages BII/CI at c. 3900–3500 cal BC, with one individual now redated to the Early Scythian period. As such, these finds are even more exceptional than previously assumed, being some of the earliest discovered for this culture. The isotope analyses indicate that these individuals are local to the region, with the dietary stable isotopes indicating a C3 terrestrial diet for the Trypillia-period humans analysed. The Scythian period individual has δ13C ratios indicative of either c. 50% marine, or alternatively C4 plant inputs into the diet, despite δ18O and 87Sr/86Sr ratios that are comparable to the other individuals studied.

scholarly journals Assessment of the Status of the Fishery of Indwagyi Lake, Myanmar Using Traditional Ecological Knowledge

2021 ◽  
pp. 27-35
Author(s):  
Luca Opperman ◽  
John Connalin ◽  
A. Wren Opperman ◽  
Zau Lunn ◽  
Htoo Naing Tun
Keyword(s):  
Traditional Ecological Knowledge ◽  
Land Use Changes ◽  
Good Condition ◽  
Google Earth ◽  
Ecological Knowledge ◽  
Wet Season ◽  
Migration Patterns ◽  
Current State ◽  
Preliminary Information ◽  
The Status

Aims: Indawgyi Lake, in northern Myanmar, is the country’s largest lake and among the largest in Southeast Asia. Although the lake’s fishery provides an important source of food and livelihoods, relatively little is known about the status of its fishery and how human actions are affecting it. Further, some basic information on fish populations has not been documented, such as the extent to which fish migrate, either downstream toward the Ayeyarwady River or into the lake’s tributaries. Similar to other lakes in the region (e.g., Inle Lake in central Myanmar), the fishing practices of Indawgyi Lake appear to be intensifying. Thus, improved understanding of the lake’s fishery and fish-migration patterns can inform future management. Study Design:  To gather preliminary information, we surveyed 6 villages around Indawgyi Lake collecting Traditional Ecological Knowledge (TEK) about the migratory behavior of fish and current state of the fishery. Place and Duration of Study: Hepa, Hepu, Lone Ton, Lonsant, Mamon Kaing, and Nyaung Bin along Indawgyi Lake in Myanmar Methodology: We interviewed fishermen in large groups at 6 villages (approximately 60 fishermen overall), aggregating results into the six village groups due to the consensus style of interviews. We performed additional spatial analyses using Google Earth Engine. Results: Fishermen reported that nearly all the fish they commonly catch are migratory, with most using upstream tributaries for spawning during the wet season. Fishermen also reported that, although most tributaries remained in good condition, several have been severely impacted by land-use changes, including gold mining. Fishermen consistently reported that harvest levels have declined dramatically in the past two decades even as they deploy more nets. Across the villages interviewed, the top recommendation to combat declines was to increase/strengthen enforcement of regulations. Conclusion: This research demonstrates the utility of TEK to provide preliminary information on poorly studied systems that can inform conservation and management.

scholarly journals Reconstructing Herbivore Diets: A Multivariate Statistical Approach To Interpreting Compound-Specific Isotope Values

2021 ◽  
Author(s):  
Mickey Hong Yi Chen ◽  
Iain P. Kendall ◽  
Richard P. Evershed ◽  
Amy Bogaard ◽  
Amy K. Styring
Keyword(s):  
Case Studies ◽  
Isotope Analysis ◽  
Statistical Treatment ◽  
Principal Component ◽  
Nitrogen Isotope ◽  
Multivariate Statistical ◽  
Sharp Separation ◽  
Statistical Framework ◽  
Multivariate Statistical Approach ◽  
Isotope Analyses

Abstract Stable nitrogen (N) isotope analysis of bulk tissues is a technique for reconstructing the diets of organisms. However, bulk nitrogen isotope (δ15N) values can be influenced by a variety of metabolic and environmental factors that can confound accurate dietary reconstruction. Compound-specific isotope analyses of amino acids (CSIA-AA) have demonstrated the power of the approach in understanding how the δ15N values of bulk collagen are assembled from the constituent AAs. Furthermore, by connecting these AA δ15N values within a robust biochemical framework interpretation of diet and environment are greatly enhanced. Several new proxies have emerged, built around selected AAs; however, the interconnectedness of AA biosynthetic pathways means that patterning of δ15N values across a wider suite of collagen AAs will occur under different environmental or dietary influences. This work seeks to test this idea by situating CSIA-AA within a robust statistical framework using principal component analysis (PCA) and Bayesian statistics to increase the interpretability of a wider range of AA δ15N values in terms of reconstructing herbivore diet. The model was tested using wild and domestic herbivores from the Neolithic settlements of Çatalhöyük (Turkey), Makriyalos (Greece), and Vaihingen (Germany) as case studies. It was found that at Makriyalos there was a sharp separation between domesticated and wild herbivores, which was present to a lesser extent at Çatalhöyük and not observed at Vaihingen. The case studies presented in this work demonstrate that multivariate statistical treatment of CSIA-AA data can deliver new insights into herbivore diet, exceeding those achievable with the Bayesian model.

Checklist of the marine and estuarine fishes of New Ireland Province, Papua New Guinea, western Pacific Ocean, with 810 new records

Zootaxa ◽  
2019 ◽  
Vol 4588 (1) ◽  
pp. 1
Author(s):  
RONALD FRICKE ◽  
GERALD R. ALLEN ◽  
DIETMAR AMON ◽  
SERGE ANDRÉFOUËT ◽  
WEI-JEN CHEN ◽  
...  
Keyword(s):  
New Records ◽  
Fish Fauna ◽  
Wide Distribution ◽  
Estuarine Fish ◽  
Western Pacific Ocean ◽  
Transitional Waters ◽  
Estuarine Fishes ◽  
Marine Habitats ◽  
Freshwater Habitats ◽  
Wide Distribution Range

A checklist of the marine and estuarine fishes of New Ireland Province is presented, with special emphasis on Kavieng District, combining both previous and new records. After the recent KAVIENG 2014 expedition, a total of 1325 species in 153 families were recorded from the region. The largest families are the Gobiidae, Pomacentridae, Labridae, Serranidae, Apogonidae, Lutjanidae, Chaetodontidae, Blenniidae, Carangidae, Acanthuridae, Scaridae, Holocentridae, Syn-gnathidae, Lethrinidae and Scorpaenidae. A total of 810 fish species (61.1 % of the total marine and estuarine fish fauna) are recorded from New Ireland for the first time.The fish fauna of New Ireland includes 142 species in transitional waters and 1264 species in marine habitats, and 54 species species in freshwater habitats. Zoogeographically, 1179 species have a wide distribution range, most frequently a broad Indo-West Pacific distribution. Among the remaining species, just 12 are endemic to New Ireland. 

Lead Isotope Analysis for Provenance Studies in the Aegean Region: A Re-Evaluation

1988 ◽  
Vol 123 ◽  
Author(s):  
Chandra L. Reedy ◽  
Terry J. Reedy
Keyword(s):  
Data Analysis ◽  
Lead Isotope ◽  
Isotope Analysis ◽  
Aegean Region ◽  
Lead Isotope Analysis ◽  
Provenance Studies ◽  
Isotope Analyses

For more than a decade lead isotope analyses have been used in attempts to identify ore sources for silver and lead artifacts from the Aegean region. These regional provenance studies have been used to formulate statements on archaeological issues in the Aegean. Methods of data analysis and presentation used to interpret lead isotope analyses have been borrowed directly from the field of geology, where this technique was developed and originally applied. However, the goals of geologists and those of archaeologists are not the same.

Pretreatment of Fithian illite for oxygen isotope analysis

Clay Minerals ◽  
1993 ◽  
Vol 28 (1) ◽  
pp. 149-152 ◽  
Author(s):  
A. J. C. Hogg ◽  
M. J. Pearson ◽  
A. E. Fallick
Keyword(s):  
Grain Size ◽  
Oxygen Isotope ◽  
Clay Minerals ◽  
Isotope Analysis ◽  
Adsorbed Water ◽  
Oil Reservoirs ◽  
Hydrocarbon Contamination ◽  
Fine Grain ◽  
Isotope Systematics ◽  
Isotope Analyses

Oxygen isotope analysis of clay minerals presents several practical difficulties. These include their very fine grain size, the presence of both hydroxyl and non-hydroxyl oxygen, adsorbed water and, where clays from oil reservoirs are concerned, the possibility of hydrocarbon contamination. To develop routines which would minimize these problems while leaving the isotope systematics of the clay undisturbed, a series of oxygen isotope analyses were made under different running conditions of the API Standard Illite–the Fithian illite.

scholarly journals The mangrove forests as nursery habitats for the ichthyofauna of Mida Creek (Kenya, East Africa)

2014 ◽  
Vol 94 (5) ◽  
pp. 865-877 ◽  
Author(s):  
Laura Gajdzik ◽  
Ann Vanreusel ◽  
Nico Koedam ◽  
Jan Reubens ◽  
Agnes Wangui N. Muthumbi
Keyword(s):  
Isotope Analysis ◽  
Spring Tide ◽  
Fish Fauna ◽  
Size Composition ◽  
Stomach Content Analysis ◽  
Trophic Levels ◽  
Food Sources ◽  
Mangrove Forests ◽  
East African ◽  
Nursery Habitats

This study investigated the presumed nursery function of mangroves for the ichthyofauna in East African swamp forests, Mida Creek. The species and size composition of the fish fauna and their trophic interactions were studied for five stations. Samples were collected during 5–6 consecutive days close to spring tide in mid-July 2011. Fish were caught using different types of passive fishing gear, such as large and small fyke nets, gill nets and, additionally, beach seines. All individuals were identified to species level, measured and preserved for further analyses. Stomach content analysis was applied to provide information about their diet. Stable isotope analysis was used to detect whether the source of primary production for the higher trophic levels is mangrove-related or not. A total of 27 fish species was recorded in a catch of 938 teleost specimens. Our analyses showed that a majority of fish belonged to the zoobenthivorous/omnivorous trophic mode, since they were partially feeding on invertebrates and on various other food sources. Two species (Sphyraena barracuda and Synodus variegatus) exhibited a mixed diet, with a piscivorous preference. Results concerning the population structure suggested that the fish community of Mida mainly consists of transient species. Juveniles were numerically more abundant in the whole Creek than adults. These findings support the hypothesis of a nursery function of the mangrove forests, Mida Creek.

Early herding at Măgura-Boldul lui Moş Ivănuş (early sixth millennium BC, Romania): environments and seasonality from stable isotope analysis

2013 ◽  
Vol 16 (2) ◽  
pp. 221-246 ◽  
Author(s):  
Marie Balasse ◽  
Adrian Bălăşescu ◽  
Anneke Janzen ◽  
Joël Ughetto-Monfrin ◽  
Pavel Mirea ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Sequential Analysis ◽  
Tooth Enamel ◽  
Isotope Analysis ◽  
Farming Systems ◽  
Bone Collagen ◽  
Late Winter ◽  
Faunal Remains ◽  
Agricultural Communities ◽  
Isotope Analyses

Stable isotope analyses were conducted on faunal remains from the site of Măgura-Boldul lui Moş Ivănuş with the objective of characterizing the environments and seasonality of husbandry in the earliest Neolithic (Gura Baciului-Cârcea/Starčevo-Criş I) of southern Romania. Results from bone collagen analysis indicate extensive herding strategies for cattle and pigs. However, sequential analysis in tooth enamel also provides evidence for winter leaf foddering in one bovine, potentially kept by the settlement over winter. In some instances, sheep were fed a13C-enriched resource in late winter, which may have also coincided with lactation. It could not be determined whether this contribution was from C3or C4plants. Although isolated, these findings may be important in evaluating how early agricultural communities dealt with environmental constraints. These results are also interpreted with reference to the models of intensive mixed farming systems recently proposed by Bogaard (2004) and Halstead (2006).

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