| 1. |
- Andersson, Mathias H., et al.
(författare)
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Fish and sessile assemblages associated with wind-turbineconstructions in the Baltic Sea
- 2010
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Ingår i: Marine and Freshwater Research. - 1323-1650 .- 1448-6059. ; 61:6, s. 642-650
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Tidskriftsartikel (refereegranskat)abstract
- Offshore wind farms are being built at a high rate around the world to meet the demand for renewable energy. We studied fish and sessile communities on and around offshore wind-turbine foundations in the southern Baltic Sea, 7 years after construction, using visual census techniques to determine how fish, sessile-invertebrate and algal communities are affected by the introduction of such structures. Fish assemblages were dominated by two-spotted gobies (Gobiusculus flavescens) that were found in large shoals in close association with the vertical surface. At the seabed, close to the foundation, the black goby (Gobius niger) was recorded in large numbers. The most obvious difference in fish densities was found between wind-power foundations extending through the entire water column and the surrounding open waters. Fouling assemblages on the vertical foundation surfaces and at the seabed just below differed from those at the seabed further away by having higher coverage of blue mussel (Mytilus edulis) and less algal growth. The results from the present study suggest that the introduction of offshore wind turbines in marine waters could have a positive effect on fish numbers and the presence of sessile invertebrates
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| 2. |
- Andrews, Allen
(författare)
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Alligator gar as a centenarian species: extending lifespan estimates using bomb radiocarbon and laser ablation-accelerator mass spectrometry
- 2024
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Ingår i: Marine and freshwater research. - 1323-1650 .- 1448-6059. ; 75
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Tidskriftsartikel (refereegranskat)abstract
- Context The potential lifespan of alligator gar (Atractosteus spatula) is currently unknown. A previous study applied bomb radiocarbon (C-14) dating to establish ages >60 years, but maximum age was limited by the rise of bomb-produced C-14 in the 1950s. Aims An exceptionally large specimen (2.6 m, 148 kg) was captured in Mississippi and otolith growth zones revealed an age estimate of 95 years. This specimen provided an opportunity to apply new technology to validate the lifespan of alligator gar. Methods Developments in accelerator mass spectrometry (AMS) led to technology that measures( 14)C continuously from carbonates (laser ablation-AMS), as opposed to single sample C-14 analysis. Key results Use of laser ablation AMS on the 2.6-m alligator gar otolith, and two smaller fish aged >60 years, supported ages that were older than original estimates by 5-20 years. Conclusions Our study indicates that alligator gar age can be underestimated for the largest fish, maximum recorded length is 2.6 m based on a historical photograph, and lifespan is at least 75-95 years with support for an age of 100 years for the 2.6-m fish. Implications An increase in lifespan of this magnitude would affect our understanding of population dynamics and recovery efforts.
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| 3. |
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| 4. |
- Buapet, Pimchanok, et al.
(författare)
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Photosynthetic activity of seagrasses and macroalgae in temperate shallow waters can alter seawater pH and total inorganic carbon content at the scale of a coastal embayment
- 2013
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Ingår i: Marine and Freshwater Research. - 1323-1650 .- 1448-6059. ; 64:11, s. 1040-1048
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Tidskriftsartikel (refereegranskat)abstract
- Many studies have reported fluctuations in pH and the concentration of dissolved inorganic carbon (DIC) in shallow coastal waters as a result of photosynthetic activity; however, little is known about how these fluctuations vary with degree of exposure among habitats, and at different scales. In the present study, diel variation in seawater pH was apparent in aquaria experiments with Zostera marina and Ruppia maritima. These pH variations were affected by light regime, biomass level and plant species. Subsequently, the natural variability in seawater pH and the concentration of DIC was assessed in six shallow embayments (three sheltered and three exposed) during sunny days. From the outer part towards the interior part of each bay, the following four habitats were identified and studied: the bay-mouth open water, seagrass beds, mixed macrophyte belts and unvegetated bottoms. The two vegetated habitats and unvegetated bottoms were characterised by higher pH and a lower concentration of DIC than in the bay-mouth water. The mixed macrophytes habitat showed slightly higher pH and a lower concentration of DIC than the seagrass and unvegetated habitats. No significant effect of exposure was detected. Our findings clearly showed that the photosynthetic activity of marine macrophytes can alter the coastal pH and the concentration of DIC and that the effects can be observed at the scale of a whole bay.
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| 5. |
- Dawson, Samantha
(författare)
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Land use alters soil propagule banks of wetlands down the soil-depth profile
- 2020
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Ingår i: Marine and freshwater research. - 1323-1650 .- 1448-6059. ; 71, s. 191-201
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Tidskriftsartikel (refereegranskat)abstract
- Many studies have investigated the effects of human disturbances on floodplain propagule banks, but few have examined how these propagule banks change down the soil depth profile. Changes in soil propagule banks with depth can indicate the state of past vegetation and potentially demonstrate the effects of different land uses on the soil profile. Here, we examined changes in soil propagule banks down the soil-depth profile in an Australian floodplain wetland with five different land-use histories, ranging from a, in this case, relatively minor disturbance (clearing) through to more major disturbance (continuous cultivation). Land use had a larger influence than floodplain geomorphology on the propagule distribution of wetland plant-group numbers. An observed decrease in individuals over the depth profile also altered terrestrial plant groups in fields with longer land-use histories. Overall, soil-propagule profiles for terrestrial plants were not as affected by land use as were those of wetland plants. The geomorphological position on the floodplain also altered the soil propagule bank, with areas subject to the most flooding having the highest number of wetland species and retaining more of these species with greater depths. In conclusion, land-use impacts alter soil-propagule banks down the profile, despite most studies focussing on the top few centimetres.
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| 6. |
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| 7. |
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| 8. |
- HAKANSON, L
(författare)
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MODELS TO PREDICT NET AND GROSS SEDIMENTATION IN LAKES
- 1995
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Ingår i: MARINE AND FRESHWATER RESEARCH. - : C S I R O PUBLICATIONS. - 1323-1650. ; 46:1, s. 305-319
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- This study models net and gross sedimentation in lakes. The fluxes of material play an important role in most lake contexts. They influence transport, bio-uptake and ecological effects of most toxins and nutrients. The aim is to present a new type of 'mix
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| 9. |
- Hurd, Catriona L., et al.
(författare)
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Ocean acidification as a multiple driver: how interactions between changing seawater carbonate parameters affect marine life
- 2019
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Ingår i: Marine and Freshwater Research. - : CSIRO Publishing. - 1323-1650 .- 1448-6059. ; 71:3, s. 263-274
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Tidskriftsartikel (refereegranskat)abstract
- ‘Multiple drivers’ (also termed ‘multiple stressors’) is the term used to describe the cumulative effects of multiple environmental factors on organisms or ecosystems. Here, we consider ocean acidification as a multiple driver because many inorganic carbon parameters are changing simultaneously, including total dissolved inorganic carbon, CO2, HCO3–, CO32–, H+ and CaCO3 saturation state. With the rapid expansion of ocean acidification research has come a greater understanding of the complexity and intricacies of how these simultaneous changes to the seawater carbonate system are affecting marine life. We start by clarifying key terms used by chemists and biologists to describe the changing seawater inorganic carbon system. Then, using key groups of non-calcifying (fish, seaweeds, diatoms) and calcifying (coralline algae, coccolithophores, corals, molluscs) organisms, we consider how various physiological processes are affected by different components of the carbonate system.
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| 10. |
- KONITZER, K, et al.
(författare)
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RETENTION AND HORIZONTAL REDISTRIBUTION OF SEDIMENTARY CHERNOBYL CS-137 IN A SMALL SWEDISH FOREST LAKE
- 1995
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Ingår i: MARINE AND FRESHWATER RESEARCH. - : C S I R O PUBLICATIONS. - 1323-1650. ; 46:1, s. 153-158
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- The horizontal and vertical distribution of sedimentary Cs-137 was examined in 20 cores to assess the long-term immobilization of Cs-137 contamination in a small Swedish soft-water lake after the nuclear accident in Chernobyl in 1986. The sediment invento
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| 11. |
- Lynch, A. Jasmyn J., et al.
(författare)
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Socio-ecological aspects of sustaining Ramsar wetlands in three biodiverse developing countries
- 2016
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Ingår i: Marine and Freshwater Research. - 1323-1650 .- 1448-6059. ; 67:6, s. 850-868
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Tidskriftsartikel (refereegranskat)abstract
- Integrating conservation and ecologically sustainable development of wetlands is a major challenge, especially in developing countries. While many developing countries harbour significant biodiversity and socio-cultural resources, they have substantial development pressures. We explore the similarities in issues around wetland conservation and sustainability in three developing countries using case studies of internationally significant wetlands in Tanzania, Colombia and Papua New Guinea. We examine key aspects of their socio-ecological values, stakeholder and governance issues, conservation and management issues, and management responses. Key challenges across these regions include inadequate knowledge and data, population and development impacts, poor regulatory and planning processes, socio-economic inequities and conflict. All three areas lack adequate inventory, survey and monitoring, and there are significant risks to some wetland values. Mechanisms such as the Ramsar Convention provide a framework to assist in addressing global wetland loss, but implementation at these sites needs to be supported by effective, integrative approaches involving natural resource regulation, conservation and the development needs of local communities. Increased commitment and resourcing, along with comprehensive stakeholder engagement, are needed to develop and implement locally tailored plans to effectively manage these sites and their values, while also addressing the range of stakeholder needs and perspectives.
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| 12. |
- Mangora, Mwita M., et al.
(författare)
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Photosynthetic responses to submergence in mangrove seedlings
- 2014
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Ingår i: Marine and Freshwater Research. - 1323-1650 .- 1448-6059. ; 65:6, s. 497-504
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Tidskriftsartikel (refereegranskat)abstract
- Flooding and salinity fluctuations are common in mangrove systems. Sometimes these events are long-lasting, persisting several months. With an increased frequency of heavy rainfalls and terrestrial run-off, subsequent floods have been associated with massive mangrove mortality and failure to regenerate in the region. Owing to climate change, these events are expected to be more common in the future. We investigated how three weeks of submergence in water of different salinities affected the photosynthetic rates in seedlings of three common mangroves: Bruguiera gymnorrhiza (L.) Lamk.; Avicennia marina (Forssk.) Vierh.; and Heritiera littoralis Dryand. We found that photosynthesis and survival rates declined with increasing salinity and submergence time for all species. Prolonged submergence caused a significant decline in photosynthetic rates (as electron transport rate - ETR) for B. gymnorrhiza (P = .021) and H. littoralis (P = 0.002), whereas significant effects of both salinity (P = 0.003) and submergence (P = 0.023) were observed between species. Maximum diurnal values of ETR declined in the order of A. marina > B. gymnorrhiza > H. littoralis. After submergence, survived seedlings were tended normally, watered twice a day with freshwater. Three seedlings of B. gymnorrhiza from freshwater and 33% seawater treatments and of A. marina from freshwater treatment displayed signs of recovery for the first 3-5 days, but after that they died. We conclude that submergence time and water salinity will affect the performance of mangrove areas, such that areas experiencing prolonged submergence with flooding dominated by saline water might be most severely impacted.
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| 13. |
- Nyqvist, Daniel, et al.
(författare)
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An angled rack with a bypass and a nature-like fishway pass Atlantic salmon smolts downstream at a hydropower dam
- 2018
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Ingår i: Marine and Freshwater Research. - : CSIRO Publishing. - 1323-1650 .- 1448-6059. ; 69:12, s. 1894-1904
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Tidskriftsartikel (refereegranskat)abstract
- Hydropower dams disrupt longitudinal connectivity and cause fragmentation of river systems, which has led to declines in migratory fish species. Atlantic salmon smolts rely on intact longitudinal connectivity to move downstream from rearing habitats in freshwater to feeding grounds at sea. Smolts often suffer increased mortality and delays when they encounter hydropower plants during their downstream migration. Currently, there are few examples of downstream passage solutions that allow safe and timely passage. We assessed the performance of two passage solutions at a hydropower dam, namely, an angled 15-mm rack with a bypass and a large nature-like fishway. The performance of these new fish passage solutions was evaluated by tracking radio-tagged Atlantic salmon smolts as they encountered the facilities. The radio-tagged smolts passed the dam 9.5 h after release (median) and exhibited a dam-passage efficiency of 84%, with passage rates increasing with body length. Fish passage occurred through both the rack bypass and the nature-like fishway. The passage efficiencies were 70-95% for the rack bypass and 47% for the nature-like fisway. The new fish passage facilities resulted in improved passage conditions at the site, confirming that angled racks with bypasses as best-practise solutions for downstream passage, but also that large nature-like fishways may act as downstream passage routes for salmon.
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| 14. |
- Näslund, Joacim, 1985, et al.
(författare)
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Behavioural responses to simulated bird attacks in marine three-spined sticklebacks after exposure to high CO2 levels
- 2015
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Ingår i: Marine and Freshwater Research. - : CSIRO Publishing. - 1323-1650. ; 66:10, s. 877-885
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Tidskriftsartikel (refereegranskat)abstract
- The rising partial pressure of CO2 (pCO(2)) in oceanic water, termed ocean acidification, is an impending threat to marine life and has previously been reported to affect several aspects of fish behaviour. We evaluated the behavioural response to a simulated avian predator attack and lateralisation in three-spined sticklebacks (Gasterosteus aculeatus) after 10 and 20 days of exposure to present day pCO(2) (400atm) or elevated pCO(2) (1000atm). We show that elevated pCO(2) lead to reduced behavioural lateralisation. However, no major differences in the sheltering response after an overhead avian attack were observed; fish from both treatments exhibited similar and strong responses. Compared with fish exposed to high pCO(2), the control fish took longer time to freeze (i.e. stop moving) after attack at Day 20 but not Day 10. The freezing duration was significantly reduced between Day 10 and Day 20 in elevated pCO(2), whereas no such reduction was observed in the control-group. However, no significant differences between treatment groups were detected at Day 20. These results demonstrate that behaviour is indeed altered by high CO2 levels, although the general responses to avian predation stimuli remain similar to those of unexposed fish, indicating that some predator avoidance behaviours of three-spined sticklebacks are robust to environmental disturbance.
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| 15. |
- Ovegård, Maria, et al.
(författare)
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Cormorant predation overlaps with fish communities and commercial-fishery interest in a Swedish lake
- 2017
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Ingår i: Marine and freshwater research. - 1323-1650 .- 1448-6059. ; 68, s. 1-9
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Tidskriftsartikel (refereegranskat)abstract
- The increase of the fish-eating cormorant (Phalacrocorax carbo sinensis) in Europe has resulted in conflicts with fisheries. In Lake Roxen, Sweden, cormorants are blamed for causing a decrease in fishery catches. To study and describe the potential effects that cormorants may have had on fish in the lake, their diet was analysed in relation to fish catches in gill-net surveys and fishery catches. Estimates of predation were achieved by ‘tag and recovery' on eel, pikeperch and perch. Cormorants predated on the most common species and sizes, which were mainly smaller perch, ruffe and roach (mean sizes of 9, 8 and 13 cm respectively). Tag recoveries from perch, eel and pike-perch detected predation estimates of 14, 7 and 15% respectively. From a highly eutrophic state, the lake has shown improvements in water quality and a development towards larger predatory fish was expected, but the results from gill-net surveys did not show this. Results indicated that cormorants and fisheries may both be responsible, but because cormorants remove more fish, they may be the main factor for the lack of recovery of large predatory fish. Their predation keeps recruitment high, but the number of fish that reach large sizes remains low.
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| 16. |
- PERSSON, J, et al.
(författare)
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PREDICTION OF BOTTOM DYNAMIC CONDITIONS IN COASTAL WATERS
- 1995
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Ingår i: MARINE AND FRESHWATER RESEARCH. - : C S I R O PUBLICATIONS. - 1323-1650. ; 46:1, s. 359-371
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Bottom dynamic conditions (areas of accumulation, erosion or transportation) in aquatic ecosystems influence the dispersal, sedimentation and recirculation of most substances, such as metals, organic toxins and nutrients. The aim of the present work was t
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| 17. |
- Svensson, Carl Johan, 1976, et al.
(författare)
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An efficient method for collecting large samples of live copepods free from detritus
- 2010
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Ingår i: Marine and Freshwater Research. - 1323-1650. ; 61:5, s. 621-624
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Tidskriftsartikel (refereegranskat)abstract
- Meiofauna are often important in the transfer of organic material to higher trophic levels in aquatic environments. However, in food web analysis the group is frequently pooled or ignored owing to the difficulty in isolating individual components of the assemblage. In this study, we developed and tested a new method for extracting photopositive and detritus-free copepod samples from sediments, and compared this method to a previous technique (Couch 1989). In our initial trials, ,400 copepods (all orders included) were collected in 15 min compared with 60 copepods using Couch’s method. In subsequent trials that focussed on specific orders of copepods, our method was at least 10 times more efficient than Couch’s method at collecting cyclopoid and harpacticoid copepods from sediments. The new method requires very little supervision and there is no requirement for a particular intensity of light. This method can increase the collection of large numbers of photopositive copepods in aquatic systems, and thereby facilitate the inclusion of this important component into future food web studies, particularly those using biomarkers such as stable isotopes or fatty acids.
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| 18. |
- Tano, Stina A., et al.
(författare)
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Tropical seaweed beds as important habitats for juvenile fish
- 2017
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Ingår i: Marine and Freshwater Research. - 1323-1650 .- 1448-6059. ; 68:10, s. 1921-1934
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Tidskriftsartikel (refereegranskat)abstract
- Seaweed beds within tropical seascapes have received little attention as potential fish habitat, despite other vegetated habitats, such as seagrass meadows and mangroves, commonly being recognised as important nurseries for numerous fish species. In addition, studies of vegetated habitats rarely investigate fish assemblages across different macrophyte communities. Therefore, the aim of the present study was to investigate the role of tropical seaweed beds as fish habitat, particularly for juvenile fish, by comparing their fish assemblages with those of closely situated seagrass beds. Fish assemblages were assessed by visual census in belt transects, where fish were identified and their length estimated, and habitat variables were estimated for each transect. The abundance of juvenile fish in seaweed beds was twice as high as that in seagrass meadows, whereas there was no difference in total, subadult or adult fish abundance. In addition, the abundance of commercially important and coral reef-associated juveniles was higher in seaweed beds, as was fish species richness. Fish assemblages differed between habitats, with siganids being more common in seagrass meadows and juvenile Labridae and Serranidae more common in seaweed beds. These results highlight that tropical seaweed beds are important juvenile fish habitats and underscore the need to widen the view of the shallow tropical seascape.
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| 19. |
- TORNBLOM, E, et al.
(författare)
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BENTHIC MICROBIAL RESPONSE TO A SEDIMENTATION EVENT AT LOW-TEMPERATURE IN SEDIMENTS OF A EUTROPHIC LAKE
- 1995
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Ingår i: MARINE AND FRESHWATER RESEARCH. - : C S I R O PUBLICATIONS. - 1323-1650. ; 46:1, s. 33-43
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- A laboratory study was performed in order to investigate the short-term response of a benthic microbial community to a spring bloom sedimentation event at low temperature. In the laboratory, organic material collected with phytoplankton nets was added to
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| 20. |
- van Camp, L. M., et al.
(författare)
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Linking male and female morphology to reproductive success in captive southern calamary (Sepioteuthis australis)
- 2005
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Ingår i: Marine and Freshwater Research. - 1323-1650. ; 56:7, s. 933-941
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Tidskriftsartikel (refereegranskat)abstract
- Sexual selection theory predicts that mating success influences the evolution of traits. Previous behavioural observations of male Sepioteuthis australis have revealed two main mating strategies in the field: ( 1) large dominant males pair and mate with females, which they defend from ( 2) smaller males attempting to mate using 'sneaker' tactics. The current study examined whether fertilisation of squid eggs laid by polyandrous females within a mesocosm reflected this field-observed size-based mating system. Polymorphic microsatellite loci were used to identify mothers and fathers of embryos, which in turn allowed us to determine the effect of body size, age, and nine other morphological traits on reproductive success. Parentage of 112 embryos was assigned among 14 possible females and 20 candidate males of varying sizes. The mating behaviour observed in captivity was consistent with the size-based strategies seen in the field yet large males did not sire proportionally more offspring; instead nearly all males, regardless of size, sired some offspring. Regression analyses indicated that females did not select sperm based on male size, shape or age. Surprisingly, female contributions were skewed, with younger females contributing more eggs than older females. The possibility of male mate-choice was explored.
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| 21. |
- Westerberg, Håkan
(författare)
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Evaluation of surgical implantation of electronic tags in European eel and effects of different suture materials
- 2013
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Ingår i: Marine and freshwater research. - 1323-1650 .- 1448-6059. ; 64, s. 324-331
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Tidskriftsartikel (refereegranskat)abstract
- Effects of implanting data-storage tags in European eel, Anguilla anguilla, and the suitability of different suture materials (braided permanent silk, permanent monofilament, absorbable and absorbable antibacterial) were examined. The tags consisted of an electronic unit and three floats on a wire, making them flexible and able to follow the swimming movements of the eel. No mortality occurred, and tagged fish did not differ from the control fish in growth. Sutures were shed or dissolved slowly. After 4 weeks, there was no difference among the groups in the proportion of sutures left. After 6 months, fish with braided silk had largely shed their sutures, fish with monofilament sutures had the majority of sutures left, whereas the fish with absorbable sutures were intermediate in between. Fish with monofilament sutures showed the least-extensive inflammation reactions and fastest wound healing. Antibacterial treatment had no effect on inflammation or healing rates. After 6 months, the tag started to become expelled through the incision in five fish (12%). The internal reaction appeared stronger around the floats, suggesting that the coating material of the floats created a tissue reaction, which should be further investigated. Intraperitoneal implantation appears to be a suitable tagging method for European silver eel, and it is recommended to close incisions using permanent monofilament sutures.
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| 22. |
- Westerberg, Håkan
(författare)
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The migration behaviour of European silver eels (Anguilla anguilla) released in open ocean conditions
- 2015
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Ingår i: Marine and freshwater research. - 1323-1650 .- 1448-6059. ; 66, s. 145-157
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Tidskriftsartikel (refereegranskat)abstract
- Despite some recent progress, there are still large gaps of knowledge about migration routes and behaviour of European eels, Anguilla anguilla, during their long-distance oceanic migration. To achieve a better understanding of the migration behaviour, 28 large female silver eels were equipped with pop-up satellite transmitters and released at three different locations in the north-eastern Atlantic Ocean and in the Sargasso Sea. The study covers tracking periods between 7 and 92 days. The distance between release point and estimated pop-up position ranged from 40 to 1000km, the mean minimum migration speeds from 1.5 to 17.0km day(-1). The eels consistently conducted distinct diel vertical movements (DVM) with daily amplitudes of more than 300m and maximum diving depths of more than 1000m. Eels released in the Sargasso Sea used greater depths and a broader temperature range than individuals released in the Atlantic Ocean closer to the European continent. At least two eels were clearly preyed upon. The transmitters ascended in a considerable range of directions from the release points. Hence, the results of the study did not allow clear conclusions about the detailed location of the spawning site and on the routes of the eels to the spawning grounds.
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| 23. |
- WEYHENMEYER, GA, et al.
(författare)
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SIMPLE METHOD TO QUANTIFY SOURCES OF SETTLING PARTICLES IN LAKES - RESUSPENSION VERSUS NEW SEDIMENTATION OF MATERIAL FROM PLANKTONIC PRODUCTION
- 1995
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Ingår i: Marine and Freshwater Research. - 1323-1650 .- 1448-6059. ; 46:1, s. 223-231
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Tidskriftsartikel (refereegranskat)abstract
- A strong relationship (r > 0.99) between settling particulate inorganic matter (SPIM) and total settling particulate matter (SPM) was observed in 315 samples from sedimentation traps in two Swedish lakes, Lake Erken and Lake Limmaren. This relationship can be used to distinguish between different sources of SPM in pelagic systems when the inflow of allochthonous particulate matter is negligible. It is possible to quantify the proportion of material from planktonic production as well as from sediment resuspension in the flux of settling or suspended particulate matter. Furthermore, fluxes of resuspended organic particles can be quantified and distinguished from fluxes of planktonic organic particles. Although Lake Erken and Lake Limmaren are quite different with respect to trophic level, lake surface area and water depth, the estimated proportion of resuspended particles in sedimentation traps was similar in both lakes. Resuspended particulate matter ranged from 35% of the total settling particulate matter up to 99%, with annual means of 83-94%. Moreover, for both lakes it was estimated that, even in epilimnetic traps, only 20-46% (annual means) of the total organic settling particulate matter was from planktonic production, whereas 54-80% (annual means) was from sediment resuspension. This is likely to have important consequences for fluxes of nutrients and contaminants.
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| 24. |
- Wibowo, Arif, et al.
(författare)
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DNA barcoding of fish larvae reveals uncharacterised biodiversity in tropical peat swamps of New Guinea, Indonesia
- 2017
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Ingår i: Marine and Freshwater Research. - 1323-1650. ; 68:6, s. 1079-1087
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Tidskriftsartikel (refereegranskat)abstract
- The Indonesian archipelago, Borneo, Sumatra and West New Guinea (Papua), hosts half of the world's known tropical peat swamps, which support a significant proportion of the estimated biodiversity on Earth. However, several species groups that inhabit peat swamp environments remain poorly characterised and their biology, particularly during early life stages, is not well understood. In the present study we characterised larval and juvenile fish biodiversity, as well as spatial and temporal variability, in a pristine peat swamp environment of the River Kumbe in West New Guinea, Indonesia, based on analysis of the mitochondrial cytochrome-c oxidase subunit 1 (COI) sequence (501bp). Altogether, 10 fish species were detected in the peat swamp habitat during the larval and juvenile stages, whereas 13 additional species were caught at older stages. Twelve species were detected only in a single site, whereas some species, such as the Western archerfish (Toxotes oligolepis) and Lorentz's grunter (Pingalla lorentzi), were observed in all sampling sites. The occurrence of fish larvae also varied temporally for several species. In contrast with many earlier DNA barcoding studies in fish, we were not able to determine the species identity for a large proportion of sequenced larvae (68%) because of the lack of corresponding COI sequences in the reference dataset. Unidentified sequences clustered into five separate monophyletic clades. Based on genetic divergences, the putative taxonomic origin for the five morphotypes are Atherinidae, Osteoglossidae, Terapontidae and Gobiidae.
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| 25. |
- WORMAN, A
(författare)
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COUPLED HYDROLOGICAL AND BIOGEOCHEMICAL MODEL FOR AQUEOUS CONTAMINANT TRANSPORT
- 1995
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Ingår i: MARINE AND FRESHWATER RESEARCH. - : C S I R O PUBLICATIONS. - 1323-1650. ; 46:1, s. 197-208
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- A coupled hydrological and biogeochemical model for aqueous contaminant transport has been developed on the basis of field data on phosphorus transport in minor drainage brooks through agricultural areas in Sweden. Large scattering exists in constitutive
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