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Colin R. Townsend - One of the best experts on this subject based on the ideXlab platform.
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Freshwater Biology the end of an era
Freshwater Biology, 2015Co-Authors: Alan G. Hildrew, Colin R. TownsendAbstract:In 2006, on looking back over 25 years of editing this journal (Hildrew & Townsend, 2007), we wrote ‘We have enjoyed it immensely and hope to continue to do so for some time yet’. Well, we have now completed a third of a century of editing, we HAVE enjoyed it immensely, but our time is now up. Thirty-three years is a very long time indeed to be an Editor, and there can be few who have achieved this in the modern era. In our time, we have accepted more than 4000 papers but rejected almost 13 000, which makes for a large number of disappointed authors. Some years ago, one of us (Alan) went on a post-conference tour cruising round the Danube delta with about a dozen well-known aquatic ecologists. One of them noted that it was rather like Agatha Christie’s ‘Murder on the Nile’ – but who should be murdered? They all agreed it should be Hildrew, as he had rejected at least one paper by each of them! We hope that, in the end, murder is not in the hearts of most of our authors, and indeed, we salute the grace of so many who have accepted our decisions without demur and sometimes even with expressions of gratitude. It is worth recording that each of us, as co-Editorsin-Chief, has rejected at least one paper submitted by the other! Here, we discuss how the journal has been transformed over the last 33 years, some evident changes in the field, and finish with a few personal thoughts about the role of journals and publishing in the modern world. First, growth in the journal was rapid and sustained. Freshwater Biology, which began life in 1971, published fewer than 50 papers per year in its first decade or so but now we are publishing over 200 (Table 1). The growth in submissions has been even greater, from fewer than 100 per year before 1982 to over 700 in 2014; in other words, our acceptance rate has fallen from more than 40% in the early years to <25% today. A particularly abrupt change occurred in 2005/06 when submissions increased from 377 to 509, coinciding with the introduction of electronic submission, now almost universal. This change also helped us further the ‘internationalisation’ of the journal, with most of the extra papers coming from places where use of the traditional postage service presented problems. Most readers will find it hard to believe that when we began our term, every aspect of publishing – submission, referee’s reports, editing and dispatching final copy to the publishers – made use of paper, typewriters, red ink (Colin) or green (Alan), and the postman. The speed of publication has inevitably increased, partly via new technology but also by relaxation of traditional page limits as electronic publication took over. Until 2005, accepted papers had to wait to be allocated to a paper issue, a delay we worked hard to minimise (down to 3 months by 2005). Papers now make it into press, on Wiley’s Early View system, in a little over a month from acceptance. It has been a story of quantitative growth and increased speed of handling, but also several steps up in quality and influence, from an essentially British journal at its inception to a leading, international journal in aquatic ecology today. Some of these changes, rather than being led by technology, have been the result of a good deal of strategic thought and effort, some of it crystal-ball gazing to look Correspondence: Alan Hildrew, School of Biological & Chemical Sciences, Queen Mary, University of London, London E1 4NS, U.K. E-mail: a.hildrew@qmul.ac.uk
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Freshwater Biology – the end of an era
Freshwater Biology, 2015Co-Authors: Alan G. Hildrew, Colin R. TownsendAbstract:In 2006, on looking back over 25 years of editing this journal (Hildrew & Townsend, 2007), we wrote ‘We have enjoyed it immensely and hope to continue to do so for some time yet’. Well, we have now completed a third of a century of editing, we HAVE enjoyed it immensely, but our time is now up. Thirty-three years is a very long time indeed to be an Editor, and there can be few who have achieved this in the modern era. In our time, we have accepted more than 4000 papers but rejected almost 13 000, which makes for a large number of disappointed authors. Some years ago, one of us (Alan) went on a post-conference tour cruising round the Danube delta with about a dozen well-known aquatic ecologists. One of them noted that it was rather like Agatha Christie’s ‘Murder on the Nile’ – but who should be murdered? They all agreed it should be Hildrew, as he had rejected at least one paper by each of them! We hope that, in the end, murder is not in the hearts of most of our authors, and indeed, we salute the grace of so many who have accepted our decisions without demur and sometimes even with expressions of gratitude. It is worth recording that each of us, as co-Editorsin-Chief, has rejected at least one paper submitted by the other! Here, we discuss how the journal has been transformed over the last 33 years, some evident changes in the field, and finish with a few personal thoughts about the role of journals and publishing in the modern world. First, growth in the journal was rapid and sustained. Freshwater Biology, which began life in 1971, published fewer than 50 papers per year in its first decade or so but now we are publishing over 200 (Table 1). The growth in submissions has been even greater, from fewer than 100 per year before 1982 to over 700 in 2014; in other words, our acceptance rate has fallen from more than 40% in the early years to
Abm Egborge - One of the best experts on this subject based on the ideXlab platform.
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Hydrobiological studies on Warri River Nigeria. Part II: seasonal trend in the physico-chemical limnology
Tropical Freshwater Biology, 2006Co-Authors: Jo Olomukoro, Abm EgborgeAbstract:Investigation of the physical and chemical parameters of Warri River was carried out to assess the impact of human activities on the aquatic ecosystem. Most parameters had their values markedly lower during the wet season than the dry season, indicating much of dilution in the stations due to runoff. The data collected differ significantly (P 0.05) at the study stations. Correlation coefficient revealed that conductivity was positively significantly correlated (P Keywords : seasonality, water chemistry, limnology, Warri River Tropical Freshwater Biology 2003/2004 Vol. 12/13: 9-23
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Changes in the rotifers of Ikpoba River Dam, Benin City, southern Nigeria
Tropical Freshwater Biology, 2005Co-Authors: Ki Iloba, Abm EgborgeAbstract:Plankton samples were taken fortnightly from the Ikpoba River Dam from February to June 1992 to determine changes in the rotifer community. Fifty-three species of rotifers belonging to thirteen families were identified. One species, Macrochaetus subquadratus of the family Trichotridae was recorded for the first time in Nigeria. In addition to this, eight species, Lecane ohionesis, L. elsa, L. signifera, Keratella lenzi, K. cochlearis, Lepadella cristata, Colurella padulosa and Vonoyella globosa were recorded for the first time in the dam. An important aspect of the changes is in its species composition. The family Lecanidae, was the most abundant in terms of species composition. An entirely new family, Proalidae in the system is the most abundant in terms of abundance. This high number was contributed by only four species. Thus the appearance of new species and the disappearance of existing ones have been an important aspect of the changes in the specific composition of rotifers from what existed in 1982. Key Words: Rotifers, dam, population change, checklist, identification. Tropical Freshwater Biology 11 (2002) 37-46
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Invertebrate fauna associated with water hyacinth ( Eichhornia crassipes ) in Benin River, southern Nigeria
Tropical Freshwater Biology, 1999Co-Authors: J.k. Kelemu, Abm Egborge, P.a. EkokotuAbstract:The invertebrate fauna associated with water hyacinth (Eichhornia crassipes) in Benin River was studied between February and August, 1990. Water hyacinth along with water samples was collected for analysis. The range of water temperature was 26.0–32.2oC, dissolved oxygen (D.O) was 1.60–14.98 mgl-1 and salinity was 0.42-6.84o/oo. Twenty-two (22) species of organisms attached to the roots of the plant were recognized. Gastropods, which made up 41.24% of the total faunal population, were the most abundant, while the annelids were the least, numerically making up only 0.08% of the faunal population. Colonisation of the roots of water hyacinth, was multiple factor dependent. Tropical Freshwater Biology VOL. 8 1999, pp. 31-40 KEY WORDS: nutrients - macrophytes - estuary - brackish water - Freshwater - fauna.
Beatrix E Beisner - One of the best experts on this subject based on the ideXlab platform.
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functional diversity of crustacean zooplankton communities towards a trait based classification Freshwater Biology 52 796 813 doi 10 1111 j 1365 2427 2007 01733 x
Freshwater Biology, 2013Co-Authors: Allain J Barnett, Kerri Finlay, Beatrix E BeisnerAbstract:The superscripted numbers in Tables 1–4 in our original publication referred in some cases to the incorrectly associated reference number as listed in the Supplementary material. In this corrigendum, we have corrected the numbering scheme in Tables 1–4 and now refer to the corrected reference list in Table 5 (which replaces the Supplementary material file). These corrections do not alter the conclusions of the paper in any way. Additionally, there was an error in Table 4, in which the Calanoida column had been sorted by species name, but not the corresponding rows in the remaining columns of the Table. This resulted in incorrect functional traits listed for the Calanoida groups. Calanoida species are now listed with their correct functional traits in Table 4 of the corrigendum with associated references in Table 5. These corrections do not alter the conclusions of the paper because the correct traits were used in the calculation of the functional dendrograms. The authors apologise sincerely for the errors and any inconvenience these may have caused.
F W H Beamish - One of the best experts on this subject based on the ideXlab platform.
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the Freshwater Biology of adult anadromous sea lampreys petromyzon marinus
Journal of Zoology, 2010Co-Authors: I C Potter, F W H BeamishAbstract:The lengths, weights and condition factors of young adult lampreys caught feeding on Gaspereau, Alosa pseudoharengus. Shad, Alosa sapidissima, and White suckers, Catostomus commersoni, in the lake-like extensions of the St. John River system during May, suggest that many lampreys do not feed in the nine to ten months following the initiation of metamorphosis in mid-July. The mean lengths (d-95% confidence limits) of individuals taken in four samples between May 13 and 29 did not differ significantly and ranged from 132-7± 2-81 to 135-7 ±3-71 mm. A significant increase in mean condition factor from II15 to 1-353 during this time indicates that the short period spent feeding in May enables the animal to replenish its food reserves prior to its downstream migration. Since several of the 81 feeding adults caught between the latter part of June and mid-July, at a point 140 km from the estuary of the St. John, were still attached to spawning-run Atlantic salmon, Salmo salar, this teleost host had probably been responsible for their transport upstream. The wide range in their length (156-403 mm), together with the presence in the lakes in May of a few young adults larger than those which have only just started feeding, suggest that the time of onset of the parasitic phase is variable but may generally commence in either the late autumn or in the spring. Scarring on salmon due to lamprey attack was predominantly (84%) on the ventral surface between the operculum and caudal peduncle. Over 35 % of the salmon examined in June 1975 had been attacked, more of these attacks being on the right side of the body of both males (59-6%) and females (49-8%) than on either the left (20-2 and 23-7 %) or both sides (20-2 and 26-5 %). While lamprey attacks may cause some mortality among the smaller teleosts, any effect on salmon is probably indirect through causing increased susceptibility to infection and stress. The ability of adult anadromous Sea lampreys to feed and grow in fresh water demonstrates the relative ease with which landlocked forms could have been evolved in response to extreme environmental changes. This evolutionary step has involved a decline in the ability to osmoregulate in high salinities and a reduction in body size and fecundity, the adaptive significances of which are discussed. Data on upstream migrants indicate that males and females undergo length reductions of at least 11 and 15 % respectively between the time of their entry into fresh water and the completion of spawning.
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Seasonal fish abundance and composition in three Thailand streams: influence of discharge
Tropical Freshwater Biology, 2006Co-Authors: F W H Beamish, Rw Griffiths, C. Kongchaiya, Phannee Sa-ardrit, P SonchaengAbstract:The fish assemblage at a site in three Thai streams was sampled by electrofishing at approximately monthly intervals. Seasonal changes in fish abundance and assemblage similarity varied inversely with discharge that mirrored seasonal rainfall patterns and affected the connectivity of each stream system both longitudinally and laterally. No other habitat variable exercised a consistent effect on abundance or assemblage similarity across the three stream sites. The seasonal pattern of species richness was similar to that for abundance but was not significantly related to discharge probably due to invasions by larger river species during high discharge. Only a few species were numerically abundant, mostly cyprinids and, less often loaches, a goby or a half beak. It is suggested species occurrence at a site depends on the interactions among discharge, water depth and the physiography of the floodplain in concert with species-related behavior and limitations on physical performance. Keywords : fish abundance, discharge, physicochemical factors, streams, seasonal, species richness, temporal changes, tropics Tropical Freshwater Biology Vol. 14 2005: 37-60
Ki Iloba - One of the best experts on this subject based on the ideXlab platform.
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Vertical distribution of Rotifera in the Ikpoba Reservoir in southern Nigeria.
Tropical Freshwater Biology, 2005Co-Authors: Ki IlobaAbstract:Biweekly water and plankton samples were collected at three stations for six months between February and June 1992 along a longitudinal axis of the Ikpoba Reservoir. At each point samples were collected vertically at intervals of 1m from surface. No physical and chemical parameters apart from temperature varied with depth. The waters were of low alkalinity and conductivity. The hydrogen-ion concentration (pH) were acidic (pH 5.5-6.5) during the dry season months of February and March which tended towards neutrality (6.9 –7.2) during the rains and later to basic ( 8.0 –10.0). The waters were also under-saturated with dissolved oxygen (10% -37%) with a near anoxic condition (10%) recorded in the bottom waters. In distribution, rotifers were found at all depth, however, the pattern of distribution varied in each station. The distribution of rotifers were not affected by the physical and chemical parameters. Key Words: Rotifers, abundance, seasonality, water quality, dam. Tropical Freshwater Biology 11 (2002) 69-89
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Changes in the rotifers of Ikpoba River Dam, Benin City, southern Nigeria
Tropical Freshwater Biology, 2005Co-Authors: Ki Iloba, Abm EgborgeAbstract:Plankton samples were taken fortnightly from the Ikpoba River Dam from February to June 1992 to determine changes in the rotifer community. Fifty-three species of rotifers belonging to thirteen families were identified. One species, Macrochaetus subquadratus of the family Trichotridae was recorded for the first time in Nigeria. In addition to this, eight species, Lecane ohionesis, L. elsa, L. signifera, Keratella lenzi, K. cochlearis, Lepadella cristata, Colurella padulosa and Vonoyella globosa were recorded for the first time in the dam. An important aspect of the changes is in its species composition. The family Lecanidae, was the most abundant in terms of species composition. An entirely new family, Proalidae in the system is the most abundant in terms of abundance. This high number was contributed by only four species. Thus the appearance of new species and the disappearance of existing ones have been an important aspect of the changes in the specific composition of rotifers from what existed in 1982. Key Words: Rotifers, dam, population change, checklist, identification. Tropical Freshwater Biology 11 (2002) 37-46
