Science topic

Amphipoda - Science topic

An order of mostly marine CRUSTACEA containing more than 5500 species in over 100 families. Like ISOPODA, the other large order in the superorder Peracarida, members are shrimp-like in appearance, have sessile compound eyes, and no carapace. But unlike Isopoda, they possess thoracic gills and their bodies are laterally compressed.
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Publications related to Amphipoda (5,583)
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The use of macroinvertebrates as indicators of water quality is an effective and low-cost tool, which is widely implemented in biomonitoring programmes. Certain taxa are characteristic of impaired watercourses (e.g. Oligochaeta, Chironomidae and Amphipoda), while others are characteristic of good-quality watercourses (e.g. Ephemeroptera, Plecoptera...
Conference Paper
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Benthic communities consist of structurally, anatomically, and functionally diverse organisms including phytobenthos and zoobenthos of different levels of food web. The composition of benthic communities depend on structure of benthic bioclimatic region, specific habitats in which the organism live, sediment texture, physical and chemical propertie...
Article
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Central European riverine networks are subject to widely varying local anthropogenic pressures, forcing species with limited dispersal abilities to adapt or become locally extinct. Previous catchment-wide studies have shown that some invertebrates tend to have pronounced population structuring throughout mountainous river networks, raising the ques...
Article
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A new species of pontogeneiid amphipod, Dautzenbergia concavipalma sp. nov., is described from cold-water corals off Angola. This is only the second observation of this genus in the South Atlantic. Important morphological characters in combination, which define the new species from its congeners, occur especially in the shape and size of gnathopod...
Article
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A new species of the genus Niphargus Schiödte, 1849 (Crustacea: Amphipoda), co-occurring with water louse Asellus cf. aquaticus (Linnaeus, 1758) (Crustacea: Isopoda) in deep wells, is described from the Tarkhankut Upland, located in the northwestern part of the Crimean Peninsula. Niphargus tarkhankuticus sp. nov. corresponds to a separate phylogene...
Article
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A new podocerid amphipod, Podocerus setouchiensis sp. nov. , is described from the Etajima Island, the Seto Inland Sea, Japan. This new species differs from its congeners by the dorsal carination of pereonites and pleonites, and form of the antenna 1, gnathopods 1 and 2, uropods 1 and 2, and telson. Nucleotide sequence data of the mitochondrial cyt...
Article
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Between 2000–2020, more than ten new populations of the invasive American bullfrog (Lithobates catesbeianus) have been reported in the southern cone of South America. We studied the stomach contents of 126 bullfrogs from a population at an early invasion stage in Uruguay (Aceguá, Cerro Largo Department). We observed a rich diet, with extensive prey...
Article
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The two congeneric hyperiids Themisto libellula and T. abyssorum provide an important trophic link between lower and higher trophic levels in the rapidly changing Arctic marine ecosystem. These amphipods are characterized by distinct hydrographic affinities and are hence anticipated to be differently impacted by environmental changes, with major co...
Preprint
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Identifying general patterns and trends underlying biological invasion population dynamics and impacts has proven elusive for scientists. Recently, the impact curve was proposed as a means to predict impacts over time from invasive alien species, characterized by a sigmoidal growth pattern in cumulative abundances. While the impact curve has been e...
Article
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Vision in the midwater of the open ocean requires animals to perform visual tasks quite unlike those of any other environment. These tasks consist of detecting small, low contrast objects and point sources against a relatively dim and uniform background. Deep-sea animals have evolved many extraordinary visual adaptations to perform these tasks. Lin...
Article
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Energy densities of six dominant benthic groups (Actinopterygii, Amphipoda, Bivalvia, Cumacea, Isopoda, and Polychaeta) and total prey energy were modeled for the nearshore western gray whale feeding area, Sakhalin Island, Russia, as part of a multi-disciplinary research program in the summer of 2015. Energy was modeled using generalized additive m...
Article
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Okhotsk or western gray whales feed in summer along the northeastern coast of Sakhalin Island, Russia, a region with oil and gas extraction facilities. Seismic surveys increased sound levels in the nearshore feeding area in 2015 for part of the summer, potentially displacing whales from preferred foraging habitat or reducing foraging efficiency. Si...
Article
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Assessing organic matter fluxes and species interactions in food webs is of main interest to understand the ecological functioning in bays and estuaries characterised by a wide diversity of primary producers and consumers. Demersal fish and cephalopod assemblages were studied across a network of 24 shallow subtidal stations in the bay of Saint-Brie...
Article
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Niphargus comprises hundreds of narrowly-endemic West Palaearctic subterranean taxa. However, a few exceptional species inhabit surface waters and have remarkably large ranges. Herein, based on morphological and molecular analyses, we provide important new records for two of these species. N. potamophilus, previously known from the eastern Azov Sea...
Article
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The present article provides an updated checklist of marine benthic amphipods and their distribution along Indian coasts. The data for the distribution and diversity of marine benthic amphipods were collected from various published literature. The name of the species was validated from WoRMS and distributional information in Indian waters was verif...
Article
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In 2016, Dikerogammarus villosus (Sowinsky, 1894) (Crustacea, Amphipoda) was recorded for the first time in the River Adda, one of the main tributaries of the major Italian river, river Po. Here we investigate its distribution, population density and size classes distribution in the main course of the river, in the territory of the South Adda Regio...
Article
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A new species of Foxiphalus Barnard, 1979 is described. The material examined was collected as part of the project "Avaliação da biota bentônica e planctônica da Bacia Potiguar e Ceará" (BPOT), off northeastern Brazilian continental slope on the state of Rio Grande do Norte at depths ranging from 135 to 283 meters. Foxiphalus potiguara sp. nov. is...
Article
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Seahorses are constantly endangered by harvesting for ornamental trade on the Brazilian coast. Information on the ecology and biology of these fish is essential for their conservation. We analyzed the feeding ecology of the seahorses Hippocampus patagonicus and H. reidi, caught as bycatch, on the coast of the Rio de Janeiro state, Brazil. Their die...
Article
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The diet of salmo trutta macrostigma in Sidi Rachid wadi was conducted on 94 individual ranging in weight from 3 to 575 g with a mean of 110.38 g and a standard deviation of 112.94. Crustaceans mainly characterize the annual food spectrum and insects constitute more than 98%. The study of the variations of the diet spectrum shows that the nature an...
Article
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Crustacea are a diverse and abundant group of the littoral and estuarine community invertebrate fauna. This study presents the first survey on the Amphipod fauna found at the Minho River estuary, Iberian Peninsula, collected through glass eel fishing bycatch, grab sampler and beam trawl sampling methods. A total of 100 specimens were examined belon...
Article
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An updated checklist for 2022 of amphipods from the English Channel (La Manche) is given for eight geographical zones. This revision brings the inventory of 1999 up to date with recent data from the Normano-Breton Gulf and other studies focused on non-indigenous fauna, as well as recent data from benthic and suprabenthic studies, mainly in the east...
Article
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Ancient lakes are known speciation hotspots. One of the most speciose groups in the ancient Lake Baikal are gammaroid amphipods (Crustacea: Amphipoda: Gammaroidea). There are over 350 morphological species and subspecies of amphipods in Baikal, but the extent of cryptic variation is still unclear. One of the most common species in the littoral zone...
Poster
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Zooplankton and suprabenthos have been slightly studied in the most upstream, oligohaline and freshwater zones of the Seine estuary (France). Seasonal samplings of this part of the Seine estuary were conducted between 2019 and 2021 to investigate the zooplankton and suprabenthos structure and the abiotic factors influencing the distribution pattern...
Article
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Amphipods are among the most abundant macroinvertebrates in freshwater ecosystems of the Palaearctic and crucial for ecosystem functioning. Furthermore, their high sensitivity to environmental change and pollutants makes them widely used model organisms in environmental sciences and ecotoxicology. In field studies and surveys across Eurasia, specie...
Article
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Here we describe a new species of Biancolina from Pernambuco, Brazil, found in association with the brown algae Sargassum spp., between 0.5 and 1.0 m depth. The new species differs from its congeners mainly by the following combination of characters: antenna 1 twice the length of antenna 2, lacinia mobilis present in both mandibles, article 4 of th...
Article
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Amphipod crustaceans are a major group of invertebrates that predominantly occur in groundwater ecosystems. Eoniphargus is a mesogammarid genus with only two known species from the groundwater systems of the Japanese archipelago and Korean Peninsula. However, there is a dearth of taxonomic studies on this genus, and the species diversity within Eon...
Article
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Currently, the freshwater amphipod Hyalella Smith, 1874 includes 91 valid species distributed only in the Americas. This study describes the fifth species for the Várzea River basin, located in the northwestern region of the state of Rio Grande do Sul, Southern Brazil. Among its most prominent features are the presence of the curve seta on the inne...
Article
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Various studies have shown the importance of using different types of Zooplankton biomasses as an additional substance in the diet of fish. In addition, the drainage water of the fish cultures could be used in plant irrigation. In this study, biomasses of water flea Daphnia magna and Gammarus pulex collected and tested, for the first time, their ef...
Article
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Two dexaminid amphipod species belonging to the genus Paradexamine were collected from Korean waters. After observation and identification compared with related congeners, these two species are revealed to be new to science. In comparative identification, one of the new species, P. acuta sp. nov. is similar to P. houtete in having an acutely rounde...
Article
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A new species of freshwater gammarid, Gammarus somaemulensis sp. nov. , was collected from Somaemuldo Island, South Korea. This new species is morphologically characterised by the absence of calceoli in antenna 2, absence of anteroproximal setae on bases in pereopods 6 and 7, outer ramus in uropod 3 with plumose setae on both margins, and a small t...
Article
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Charadriiformes represent one of the largest orders of birds; members of this order are diverse in morphology, behavior and reproduction, making them an excellent model for studying evolution. It is accepted that the avian putative ancestral karyotype, with 2n = 80, remains conserved for about 100 million years. So far, only a few species of Charad...
Article
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The genus Eudevenopus includes 4 valid species, inhabitants of relatively shallow waters in both sides of America. A fifth species, collected with a light trap in Sisal, Yucatán Peninsula is described and illustrated in this paper. Eudevenopus winfieldi n. sp. can be distinguished from other species in the genus by the pereopod 7 dactylus, which is...
Article
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The hadal amphipod Hirondellea gigas is an emblematic animal of the Pacific trenches, and has a number of special adaptations to thrive in this ‘extreme’ environment, which includes the deepest part of the Earth’s ocean. One such adaptation that has been suggested is the presence of an ‘aluminum gel shield’ on the surface of its body in order to pr...
Article
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Crustaceans are characterized by some of the most variable genome sizes among animals. Significant relationships between genome size and specific eco-physiological and morphological features have been described in many crustacean taxa, such as Amphipoda, Ostracoda, Cladocera, and Copepoda. A consistent pattern of genome size variation is yet to be...
Article
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Landmark-Based Geometric Morphometric Methods were used for the first time to quantitatively assess shape variations of the third epimeral plate (Ep3) of six Gammarus species (G. lordeganensis, G. parthicus, G. pretzmanni, G. pseudosyriacus, Gammarus sp1 and Gammarus sp2.) from five different localities in Iran. Two landmarks and 10 semi-landmarks...
Article
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Sounds from human activities such as shipping and seismic surveys have been progressively invading natural soundscapes and pervading oceanic ambient sounds for decades. Benthic invertebrates are important ecosystem engineers that continually rework the sediment they live in. Here, we tested how low-frequency noise (LFN), a significant component of...
Article
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Spanning the Southern Ocean high latitudes, Sub-Antarctic islands are protected areas with high conservation values. Despite the remoteness of these islands, non-native species threaten native species and ecosystem function. The most ubiquitous and speciose group of non-native species in the region are invertebrates. Due to their cryptic habits and...
Article
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Study of small-sized or taxonomically challenging taxa is mandatory to early detect exotic species. The caprellid Paracaprella pusilla has been successfully spreading in many world areas in the last decade. Biofouling from culture lanterns of bivalves Argopecten purpuratus and Pteria sterna were collected between February 2017 and November 2018 in...
Article
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The subterranean amphipod genus Pseudocrangonyx is diverse in Far East Asia, including the Japanese Archipelago. However, Pseudocrangonyx species have not been recorded from the Ryukyu Islands, which extend southwest of the Japanese Archipelago. This study describes a new species of Pseudocrangonyx, Pseudocrangonyx dunan sp. nov., from Yonaguni Isl...
Article
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Producto del estudio de material depositado en la colección del Museo de Invertebrados Marinos de la Universidad de Miami se registran nuevas ubicaciones y se amplía la distribución de cuatro especies de peracáridos. Estas especies son el isópodo Syscenus infelix y tres especies de anfípodos pertenecientes al género Trischizostoma: T. costai, T. ri...
Article
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This study reports the occurrence of Phronima sedentaria in the Eastern Mediterranean. The new pram shrimps were collected from the Gulf of Antalya, located on the Levantine coast of Turkey. Examination and definition of the sampled specimen in the area reported as the first occurrence.
Article
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Marine crustaceans are known as a group with high morphological diversity and great economic value. Most species have planktonic larval stages that are difficult to identify to species level using traditional approaches because of insufficient morphological diagnostic characters or taxonomic descriptions. We used DNA barcoding and molecular species...
Article
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Two new species of Floresorchestia (Crustacea: Amphipoda) are described from Amphawa Estuary, Samut Songkhram Province, Thailand. Floresorchestia amphawaensis sp. nov. is a riparian-hoppers living near agricultural and urban areas, being distinguished by the following character states: left mandible lacinia mobilis 4-dentate; gnathopod 2 palm reach...
Article
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Stygofauna sampling predominantly comprises active sampling methods, such as net hauling or hand netting, which although highly effective at collecting specimens, can cause significant specimen damage and is unlikely to collect vagrant species. Studies assessing the efficacy of using stygofauna traps (both baited and unbaited) have been conducted w...
Article
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Comprehensive surveys on subterranean fauna are an emerging need for assessing species diversity patterns and for developing biodiversity conservation strategies considering anthropogenic changes to the environment (e.g., mineral and water extraction, climate change). Subterranean habitats comprise mainly terrestrial and aquatic aspects of caves an...
Article
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The groundwater amphipod genus Niphargus comprises over 425 described species mainly distributed in the Western Palearctic. Representatives of the genus are quite rare in areas formerly occupied by Quaternary glaciers. Although a couple of species were previously discovered in high-elevation caves and karstic springs, it is only recently that the g...
Conference Paper
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Kongsemae land-hopper or Floresorchestia kongsemae is a field-hopper found in a man-made pool at Kasetsart University, Thailand. They mainly inhabit on land, but their feeding ecology and diets are still poorly known. Herein, the mouthparts and gut content of F. kongsemae are investigated. The results indicate that the amphipod is classified as a f...
Article
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The Ponto-Caspian region is an endemicity hotspot that harbours several crustacean radiations, among which amphipods are the most diverse. These poorly known species are severely threatened in their native range, while at the same time they are invading European inland waters with significant ecological consequences. A proper taxonomic knowledge of...
Article
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Understanding factors that influence a species’ distribution and abundance across the annual cycle is required for range-wide conservation. Thousands of imperiled red knots ( Calidris cantus rufa ) stop on Virginia’s barrier islands each year to replenish fat during spring migration. We investigated the variation in red knot presence and flock size...
Article
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The collection of zooplankton swimmers and sinkers in time‐series sediment traps provides unique insight into year‐round and interannual trends in zooplankton population dynamics. These samples are particularly valuable in remote and difficult to access areas such as the Arctic Ocean, where samples from the ice‐covered season are rare. In the prese...
Article
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This survey reports the spatial distribution of gastropods belonging to Caenogastropoda, Architaenioglossa, Littorinimorpha, Cycloneritida and Hygrophila orders, and malacostracans from Amphipoda and Mysida orders in the lower sector of the Danube River, Romania, using DNA barcoding based on the cytochrome C oxidase I (COI) gene sequence. Sampling...
Article
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Hyalella is a genus of epigean freshwater amphipods endemic to the Americas. The study of morphological characters alone has traditionally dominated the description of new species. Recently, molecular systematics tools have contributed to identifying many cryptic species and a high level of convergent evolution in species complexes from North Ameri...
Article
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Исследованы интенсивность потребления кислорода и скорость экскреции фосфора у планктонных ракообразных Daphnia longispina O.F. Müller (Cladocera), донных ракообразных Hyalella azteca (Saussure) (Amphipoda) и рыб Oryzias latipes (Temminck & Schlegel) (Beloniformes), объединенных трофическими связями в одной экспериментальной экосистеме. Наиболее вы...
Article
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Integrative analysis revealed that the stygobiotic Crangonyx chlebnikovi Borutzky, 1928 (Amphipoda: Crangonyctidae) from the Southern Ural, Russia, should be placed into a separate new genus, Uralocrangonyx gen.n. Together with the European Crangonyx subterraneus Bate, 1859 and Crangonyx paxi Schellenberg, 1935 as well as North American Bactrurus s...
Article
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Lake Baikal is the only freshwater reservoir inhabited by deep-water fauna, which originated mostly from shallow-water ancestors. Ommatogammarus flavus and O. albinus are endemic scavenger amphipods (Amphipoda, Crustacea) dwelling in wide depth ranges of the lake covering over 1300 m. O. flavus had been previously collected close to the surface, wh...
Article
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During the Census of Marine Life Polarstern ANDEEP I-III and Meteor M79/1 DIVA-3 expeditions, autonomous baited trap systems were employed to sample the mobile, necrophagous amphipods from abyssal depths. Within DIVA-3 (July 10–August 26 2009), a free-fall baited trap was used successfully at three stations in the southwest Atlantic, once in the Ar...