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2,048 results for “Amphipod”
Data for: Systematic and highly resolved modelling of biodiversity in inherently rare groundwater amphipods (Journal of Biogeography, 2024)
<p>Original research article:</p> <p>Knüsel, M., Alther, R., Locher, N., Ozgul, A., Fišer, C. & Altermatt, F. (2024). Systematic and highly resolved modelling of biodiversity in inherently rare groundwater amphipods. <em>Journal of Biogeography</em>, https://doi.org/10.1111/jbi.14975.</p>
Spatiotemporal dynamics in freshwater amphipod assemblages are associated with surrounding terrestrial land use type - Dataset
<p>Biological assemblages are the result of dynamic processes that have explicit temporal and spatial dimensions. While biodiversity patterns can be directly inferred from the structure of these assemblages, an assessment of changes through time and space is needed to understand how organisms initially assembled and how they are responding to local environmental and biotic factors. Small freshwater streams are particularly affected by contemporary anthropogenic activities and biological invasions, yet are commonly less studied, as studies often focus on lakes and large streams. Here, we conducted a spatially explicit analysis of keystone shredder assemblages across eight years in twelve replicated small tributary streams. In each stream, we monitored multiple sites per km stream length. By assessing temporal beta diversity dynamics, defined by the gain or loss of species or abundance-per-species at individual sites, we show that changes in amphipod assemblages occur within the context of the surrounding terrestrial matrix and reflect recent amphipod colonization history. While amphipod composition was mostly constant in streams located in forested catchments, streams embedded in catchments with more extensive agricultural land use displayed more pronounced temporal changes, either driven by colonization of unoccupied upstream locations, or by more pronounced but undirected fluctuations in gains and losses of species or abundance-per-species. Our study thus suggests that agricultural landscapes might destabilize aquatic amphipod assemblages, causing higher temporal changes in community structures, and highlighting the vulnerability of aquatic ecosystems to terrestrial land use drivers.</p>
SBC LTER: BEACH: Talitrid amphipod (Megalorchestia spp.) mesocosm and pitfall trapping for surface activity on spring and neap tides
These data describe the surface activity of talitrid amphipod species (Megalorchestia spp.), and unidentified juveniles, on a spring tide and a neap tide during July and August 2017. The data tables include (1) the mean number and standard deviation of surface active individuals of each species each hour for a 24 hour period on a spring tide and on a neap tide in mesocosms, and (2) the count of each species and unidentified juveniles from pitfall trap samples collected every 2 hours on 4 replicate transects on a spring tide and on a neap tide. This dataset is to support the journal article: Emery, KA, VR Kramer, NK Schooler, KM Michaud, JR Madden, DM Hubbard, RJ Miller, JE Dugan. 2021. Habitat partitioning by mobile intertidal invertebrates of sandy beaches shifts with the tides. Ecosphere.
SBC LTER: BEACH: Talitrid amphipod (Megalorchestia spp.) mean positions on spring and neap tides
These data describe the position of four burrowed talitrid amphipod species (Megalorchestia spp.) and unidentified juveniles surveyed on a spring tide and a neap tide in August 2016. The data table includes the counts of each species, including unidentified juveniles, from each core sample (1-30) on each transect (A-F). The distance of the sample from the bluff (0 m) is also given. The dataset is to support the journal article: Emery, KA, VR Kramer, NK Schooler, KM Michaud, JR Madden, DM Hubbard, RJ Miller, JE Dugan. 2021. Habitat partitioning by mobile intertidal invertebrates of sandy beaches shifts with the tides. Ecosphere.
Fig. 3 in Cerrorchestia taboukeli sp. nov., a new terrestrial amphipod (Amphipoda, Talitridae) from Martinique Island
Fig. 3. Cerrorchestia taboukeli sp. nov. A–B. Holotype, ♂, 11.3 mm, MNHN-IU-2019-2276. C–D. Paratype, ♀, 9.6 mm, MNHN-IU-2019-2278. A. Gnathopod 1 (scale 1). B. Gnathopod 2 (scale 2). C. Gnathopod 1 (scale 1). D. Gnathopod 2 (scale 1).
Fig. 8A-J in Taxonomy of the spring dwelling amphipod Synurella ambulans (Crustacea: Crangonyctidae) in West Russia: with notes on its distribution and ecology
Fig. 8A-J. Synurella ambulans (F. Müller, 1846), ♀, 4.0 mm, FENU X34906/Cr-1406, KF. A. Lateralia. B. Antenna 2. C. Pereopod 5. D. Pereopod 6. E. Pereopod 7. F. Epimera 1-3. G. Uropod 1. H. Uropod 2. I. Uropod 3. J. Telson. Scale bars 0.2 mm.
Fig. 5A-E in Taxonomy of the spring dwelling amphipod Synurella ambulans (Crustacea: Crangonyctidae) in West Russia: with notes on its distribution and ecology
Fig. 5A-E. Synurella ambulans (F. Müller, 1846), Ƌ, 4.5 mm, FENU X34906/Cr-1406, MO. A. Pereopod 3. B. Pereopod 4. C. Pereopod 5. D. Pereopod 6. E. Pereopod 7. Scale bars 0.2 mm.
Fig. 3A-B in Taxonomy of the spring dwelling amphipod Synurella ambulans (Crustacea: Crangonyctidae) in West Russia: with notes on its distribution and ecology
Fig. 3A-B. Synurella ambulans (F. Müller, 1846), Ƌ, 4.5 mm, FENU X34906/Cr-1406, MO. A. Gnathopod 1. B. Gnathopod 2. Scale bars 0.2 mm.
Fig. 6A-H in Taxonomy of the spring dwelling amphipod Synurella ambulans (Crustacea: Crangonyctidae) in West Russia: with notes on its distribution and ecology
Fig. 6A-H. Synurella ambulans (F. Müller, 1846), Ƌ, 4.5 mm, FENU X34906/Cr-1406, MO. A. Pleopod 1. B. Pleopod 2. C. Pleopod 3. D. Epimera 1-3. E. Uropod 1. F. Uropod 2. G. Uropod 3. H. Telson. Scale bars 0.2 mm.
Fig. 4A-L in Taxonomy of the spring dwelling amphipod Synurella ambulans (Crustacea: Crangonyctidae) in West Russia: with notes on its distribution and ecology
Fig. 4A-L. Synurella ambulans (F. Müller, 1846), Ƌ, 4.5 mm, FENU X34906/Cr-1406, MO. A. Antenna 1. B. Antenna 2. C. Maxilla 1. D. Maxilla 2. E. Lower lip. F. Left mandible. G. Right mandible. H. Upper lip. I. Maxilliped. J. Maxilliped, inner plate. K. Maxilliped, outer plate. L. Distal part of maxilliped palp, female, 6.0 mm, FENU X34906/Cr-1406, PP. Scale bars 0.2 mm.
Fig. 2A-C in Taxonomy of the spring dwelling amphipod Synurella ambulans (Crustacea: Crangonyctidae) in West Russia: with notes on its distribution and ecology
Fig. 2A-C. Synurella ambulans (F. Müller, 1846). A. Yellow spot on the dorsal surface of the head of live specimens (front and left side), MO. B. Ƌ, 4.2 mm, FENU X34906/Cr-1406, KF. C. ♀, 5.5 mm, FENU X34906/Cr-1406, BN, left side (preserved specimens).
Fig. 1 in Taxonomy of the spring dwelling amphipod Synurella ambulans (Crustacea: Crangonyctidae) in West Russia: with notes on its distribution and ecology
Fig. 1. Map indicating the geographic distribution of Synurella ambulans (F. Müller, 1846) in western Russia. Legend: "empty" springs display undisturbed springs with a rich crenophilous fauna without S. ambulans. Literature data: Borutzky (1929), Chertoprud (2006a, 2006b). Source: Blank Mapping Tools, Moscow (2009).
Fig. 7A-B in Taxonomy of the spring dwelling amphipod Synurella ambulans (Crustacea: Crangonyctidae) in West Russia: with notes on its distribution and ecology
Fig. 7A-B. Synurella ambulans (F. Müller, 1846), ♀, 4.0 mm, FENU X34906/Cr-1406, KF. A. Gnathopod 1. B. Gnathopod 2. Scale bars 0.2 mm.
Figure 9 in Two new species of eyeless amphipods from a coastal area in Japan (Crustacea: Amphipoda: Hadziidae, Melitidae), with reinstatement of the genus Paraniphargus Tattersall, 1925
Figure 9. Paraniphargus shiosai sp. nov. (a–c, e–g) holotype, male (OMNH-Ar-9986), 1.7 mm; (d, h) paratype, male (OMNH-Ar-9987), 1.9 mm; (i–k) paratype, female (OMNH-Ar-9989), 1.8 mm. (a) Right pleopod 1, lateral view; (b) left pleopod 2, posterior view; (c) left pleopod 3, anterior view; (d) left uropod 1, dorsolateral view; (e, f) right uropods 2–3, dorsal views; (g) telson, lateral view; (h) telson, dorsal view; (i, j) left gnathopods 1–2, lateral views; (k) left coxa 6, lateral view, gill omitted. Scale: d– h, 0.125 mm; a–c, i–k, 0.10 mm.
Figure 8 in Two new species of eyeless amphipods from a coastal area in Japan (Crustacea: Amphipoda: Hadziidae, Melitidae), with reinstatement of the genus Paraniphargus Tattersall, 1925
Figure 8. Paraniphargus shiosai sp. nov. Holotype, male (OMNH-Ar-9986), 1.7 mm. (a, b) Left gnathopods 1–2, lateral views; (c) left pereopod 3, lateral view; (d) right pereopod 4, lateral view; (e–g), right pereopods 5–7, lateral views; (g1), left coxa 7, lateral view.
Figure 6 in Two new species of eyeless amphipods from a coastal area in Japan (Crustacea: Amphipoda: Hadziidae, Melitidae), with reinstatement of the genus Paraniphargus Tattersall, 1925
Figure 6. Paraniphargus shiosai sp. nov. Holotype, male (OMNH-Ar-9986), 1.7 mm. Habitus, lateral view. Scale: whole body, 0.25 mm; magnified parts, 0.08 mm.
Figure 4 in Two new species of eyeless amphipods from a coastal area in Japan (Crustacea: Amphipoda: Hadziidae, Melitidae), with reinstatement of the genus Paraniphargus Tattersall, 1925
Figure 4. Dulzura projecta sp. nov. All but (e), holotype, male (OMNH-Ar-9974), 6.6 mm; (e) paratype, male (OMNH-Ar-9975), 5.2 mm. (a) Right pleonal epimera 1–3, lateral view; (b) left pleopod 1, anterior view; (c) left pleopod 2, posterior view; (d) left pleopod 3, posterolateral view; (e) left pleopod 3, posterior view; (f) left uropod 1, dorsolateral view; (g) left uropod 2, lateral view; (g1) mediodistal corner of left uropod 2 peduncle, medial view; (h) right uropod 3, dorsal view; (i) telson, dorsal view. Scale: a–d, 0.50 mm; e–i, 0.41 mm, g1, 0.25 mm.
Marine amphipods as a new live prey for ornamental aquaculture: exploring the potential of Parhyale hawaiensis and Elasmopus pectenicrus
<p>Supplementary data from the scientific paper contribution " Marine amphipods as a new live prey for ornamental aquaculture: exploring the potential of Parhyale hawaiensis and Elasmopus pectenicrus".</p> <p> </p> <p>Marine amphipods are gaining attention in aquaculture as a natural live food alternative to traditional preys such as <em>Artemia</em>, as they are rich in essential nutrients such as the lipids eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), are an important natural diet of many marine fish of commercial interest, and are relatively easy to culture in large numbers. However, there are no established culture techniques and a deeper knowledge on the reproductive biology, nutritional profiles and culture methodologies is still needed to potentiate the optimization of mass production. The present study assessed for the first time the aquaculture potential of <em>Parhyale hawaiensis</em> and <em>Elasmopus pectenicrus</em>, two cosmopolitan marine gammarids (as per traditional schemes of classification) that naturally proliferate in the wild and in aquaculture facilities. For that purpose, aspects of the population and reproductive biology of wild populations were characterized and then a series of laboratory-scale experiments were conducted to determine the amphipod productivity, the time needed to reach sexual maturity by the newborns (generation time), cannibalism degree, the effects of sex ratio on fecundity and the effects of diet (shrimp diet, plant-based diet and commercial fish diet) on fecundity and the juvenile growth. <em>P. hawaiensis</em>, unlike <em>E. pectenicrus</em>, was easily kept and propagated in laboratory conditions, performing exceedingly better than <em>E. pectenicrus</em>. <em>P. hawaiensis </em>showed a higher total length (9.3 ± 1.3 mm), wet weight (14.4 ± 6.2 mg), dry weight (10.5 ± 4.4 mg), females/males sex ratio in the wild (2.24), fecundity (12.8 ± 5.7 embryos per female), and gross energy content (16.71 ± 0.67 kJ g-1) with respect to <em>E. pectenicrus</em>. Although the <em>P. hawaiensis</em> juvenile growth was slightly reduced (marginally significant) by the use of a plant-based diet compared to a commercial shrimp and fish diet, fecundity was not affected, supporting the possible use of inexpensive diets to mass produce amphipods as live or frozen food. Possible limitations identified were their quite long generation times (50.9 ± 5.8 days) and relatively low fecundity levels (12.8 ± 5.7 embryos per female). With an observed productivity rate of 0.36 ± 0.08 juveniles per amphipod couple per day, <em>P. hawaiensis</em> could become a specialty feed for species that cannot easily transition to a formulated diet such as seahorses and other highly-priced marine ornamental species. Future studies should assess the nutritional value and to explore optimized medium- and large-scale production as well as self-producing biofloc systems taking advantage of the great dietary plasticity and environmental tolerance of the species.</p>
Fig. 13 in A new genus and two new species of cavernicolous amphipods (Crustacea: Typhlogammaridae) from the Western Caucasus
Fig. 13. Adaugammarus pilosus gen. et sp. nov. Holotype, ♀, 13.5 mm, X44046/Cr-1652-FEFU. A. Left mandible. B. Right mandible. C. Article 3 of mandibular palp, ventral setation. D. Upper lip. E. Lower lip. F. Maxilla I. G. Outer plate of maxilla 1. H. Palp of right maxilla 1. I. Maxilla 2. J. Maxilliped. K. Inner plate of maxilliped, inner face. L. Inner plate of maxilliped, outer face. M. Outer plate of maxilliped.
Fig. 16 in A new genus and two new species of cavernicolous amphipods (Crustacea: Typhlogammaridae) from the Western Caucasus
Fig. 16. Adaugammarus pilosus gen. et sp. nov. Paratype X44049/Cr-1655-FEFU, ♂, 17.5 mm. A. Gnathopod 1, part. B. Gnathopod 2, part. C. Uropod 1. D. Uropod 2. E. Uropod 3. F. Telson.
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