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Karl J Wittma - One of the best experts on this subject based on the ideXlab platform.

  • lophogastrida and Mysida crustacea of the diva 1 deep sea expedition to the angola basin se atlantic
    European journal of taxonomy, 2020
    Co-Authors: Karl J Wittma
    Abstract:

    Three species of Lophogastrida and eight Mysida are documented for samples from 5161–5497 m bottom depth in the Angola Basin. Previously known latitudinal ranges are extended southward for five species, and bathymetric ranges extended beyond 5000 m for six species. Upon revision of the subfamily Petalophthalminae (Mysidae), four species previously attributed to the genus Petalophthalmus are integrated into Ipirophthalmus gen. nov. as I. liui gen. et comb. nov., I. caribbeanus gen. et comb. nov., I. oculatus gen. et comb. nov., and I. macrops gen. et comb. nov., mainly based on the structure of eyes and presence of setae on the telson. Petalophthalmus cristatus sp. nov. is described based on its reduced cornea and the structure of eyestalks, rostrum, mandibles, and telson. The structure of mouthparts, foregut and maxillipeds suggests an omnivorous mode of life. The diagnosis of the tribe Calyptommini (Mysidae: Erythropinae) is widened to cover the 3-segmented, uniramous fourth male pleopod and the non-incised eyeplate with horn-like rudiments of eyestalks in Abyssomysis cornuta gen. et sp. nov. The structure of mandibles, foregut, and second maxilliped suggest detritus feeding in this species. Keys to the Calyptommini and Petalophthalminae are given.

  • amazonia versus pontocaspis a key to understanding the mineral composition of mysid statoliths crustacea Mysida
    Biogeographia – The Journal of Integrative Biogeography, 2019
    Co-Authors: Karl J Wittma, Antonio P Ariani
    Abstract:

    Author(s): Wittmann, Karl J.; Ariani, Antonio P. | Abstract: We have determined the mineral composition of statoliths in 169 species or subspecies (256 populations) of the family Mysidae on a worldwide scale. Including previously published data, the crystallographic characteristics are now known for 296 extant species or subspecies: fluorite (CaF2) in 79%, vaterite (a metastable form of crystalline CaCO3) in 16%, and non-crystalline (organic) components in 5%, the latter exclusively and throughout in the subfamilies Boreomysinae and Rhopalophthalminae. Within the subfamily Mysinae vaterite or fluorite were found in three tribes, whereas other three tribes have fluorite only. The exclusive presence of fluorite was confirmed for the remaining seven subfamilies. Hotspots of vaterite were found in Amazonia and the Pontocaspis, in each case with reduced frequencies in main and tributary basins of the Atlantic and N-Indian Ocean. Vaterite is completely absent in the remaining aquatic regions of the world. In accordance with previous findings, fluorite occurred mainly in seawater, vaterite mostly in brackish to freshwater. Only vaterite was found in electrolyte-poor Black Water of Amazonia, which clearly cannot support the high fluorine demand for renewal of otherwise large fluorite statoliths upon each moult. Vaterite prevails in Diamysini, distributed over most of the area once occupied by the Tethyan Sea. It also prevails in Paramysini with main occurrence in the Pontocaspis, where fossil calcareous statoliths in the stable form of calcite are known from Miocene sediments of the brackish Paratethys. Four Recent genera from three tribes are heterogeneous in that they comprise both vaterite- and fluorite-precipitating species. Previous hypotheses are expanded to cover greater geographic and time scales, proposing that fluorite-bearing marine ancestors penetrated freshwaters in Tethyan and Paratethyan basins, where they developed precipitation of vaterite. This gave their successors predispositions for shifting into separate evolutionary lines from fluorite to vaterite precipitation and vice versa.

  • three new species of heteromysis Mysida Mysidae heteromysini from the cape peninsula south africa with first documentation of a mysid cephalopod association
    ZooKeys, 2017
    Co-Authors: Karl J Wittma, C L Griffiths
    Abstract:

    Faunistic studies in sublittoral and littoral marine habitats on the Cape Peninsula, South Africa, have yielded three new species belonging to the genus Heteromysis, subgenus Heteromysis: H. cancellisp. n. associated with the diogenid hermit crab Cancellus macrothrix Stebbing, 1924, and H. fosterisp. n. extracted from 'empty' urchin and gastropod shells. The first documented mysid-cephalopod association is reported for H. octopodissp. n. which was found in dens occupied by Octopus vulgaris Cuvier, 1797, but was also captured from tide pools. The three new species differ from previously known E. Atlantic species, among other characters, by a single spine on the endopods of uropods in combination with large cornea and absence of median sternal processes on thoracic somites. They are also characterized by a white stripe along the dorso-lateral terminal margin of the eyestalks in living specimens. The new species appear quite similar to each other, but are distinguished by different depths of the telson cleft, different distributions of spines on the lateral margins of the telson, different numbers of segments on thoracic endopod 4, and by differently modified setae on the carpus of the third thoracic endopod, as well as on the carpopropodus of the fourth endopod. An updated key to the species of Heteromysis known from the E. Atlantic is given.

  • heteromysis sabelliphila sp nov Mysida Mysidae heteromysinae in facultative association with sabellids from the cape verde islands subtropical n e atlantic
    Crustaceana, 2017
    Co-Authors: Karl J Wittma, Pete Wirtz
    Abstract:

    A survey of crustaceans associated with benthic invertebrates in near-shore habitats at islands of the Cape Verde archipelago yielded a new species belonging to the genus Heteromysis , subgenus Olivemysis : H. sabelliphila sp. nov. shows a non-obligatory association with the sabellid polychaete Branchiomma nigromaculatum only during the night. This is the first documented mysid–polychaete association. The mysids apparently took particles collected by the polychaete, suggesting a kleptoparasitic interspecific relationship. A set of three specifically modified setae on the antennular trunk is shared by the new species with two Heteromysis species from Madeira (subtropical N.E. Atlantic), suggesting a close morphological relationship within the subgenus Olivemysis : with H. wirtzi , commensal of the sea anemone Telmatactis cricoides , and with H. dardani , commensal of the hermit crab Dardanus calidus . A key to the Heteromysinae of the E. Atlantic and Mediterranean is given.

  • the Mysidae crustacea peracarida Mysida in fresh and oligohaline waters of the mediterranean taxonomy biogeography and bioinvasion
    Zootaxa, 2016
    Co-Authors: Karl J Wittma, Antonio P Ariani, Mikhail E Daneliya
    Abstract:

    A census of Mysidae yielded a total of twelve species plus two non-nominotypical subspecies found so far in fresh and oligohaline waters of the Mediterranean, all belonging to the subfamily Mysinae. Among the nine species in fresh-waters, three are stenoendemics, namely of a single lake ( Diamysis lacustris ), of two neighbouring river systems ( Paramysis kosswigi ) or of karstic cave waters ( Troglomysis vjetrenicensis ). Four species— T. vjetrenicensis , D. lacustris , D. fluviatilis , and Paramysis adriatica sp. nov. described in this paper—are confined to freshwater tributaries of the Adriatic Sea (NE-Mediterranean). This strengthens previous findings about the outstanding role of the Adriatic basin for the endemic diversity of freshwater Mysidae within the Mediterranean. This is possibly related to alternating marine and freshwater-terrestrial phases during the Pliocene-Pleistocene in this semi-enclosed basin. Based on current knowledge, freshwater populations of D. mesohalobia heterandra are also confined to the Adriatic basin; this taxon, however, shows many more populations in brackish waters of the E-Mediterranean and Marmora basins. Two freshwater species ( Limnomysis benedeni , Hemimysis anomala ) are wide-range invaders of Ponto-Caspian origin, with recent expansion into fresh and brackish waters of the NW-Mediterranean. A further immigrant to this part of the Mediterranean, Neomysis integer , is of NE-Atlantic origin and occurs only marginally in fresh-water. Five among the nine species found at least once in fresh-water were also reported in oligohaline conditions, mostly also at even higher salinities. A total of eight species plus two subspecies were recorded in oligohaline waters ( S = 0.5–5). Among these, only one oligohalobious stenoendemic, Diamysis hebraica , inhabits streams at the Levantine coast. In the historical biogeographical context, the current distribution of only one out of nine indigenous species in an- to oligohaline waters of the Mediterranean, namely the mainly meso- to polyhalobious Mesopodopsis slabberi , may date back to the early Pliocene flooding of the Mediterranean by Atlantic waters and to later events. For most species, the biogeographical pattern points to a primary origin in the brackish (Miocene) Paratethys; solely the cave-dwelling T. vjetrenicensis has more ancient roots in the Tethyan (Mesogeic) Sea. Both these hypotheses are supported by chorological data and mainly the mineral composition of statoliths. The statoliths are composed of CaCO 3 as the metastable crystal phase vaterite in nine species plus two subspecies considered versus the otherwise more common CaF 2 (fluorite) in only three species (or in 7 + 2 versus two Mediterranean indigenes). All 12 + 2 Mediterranean taxa are figured and described in detail, particularly regarding P. adriatica sp. nov. and the substantially redescribed T. vjetrenicensis Stammer, 1933. Supplementary descriptions are given for P. kosswigi Băcescu, 1948, D. hebraica Almeida Prado-Por, 1981, and N. integer (Leach, 1814). A key to the 14 taxa is given including additional three species of potential future invaders. The tribe Mysini Haworth, 1825, is revised by detachment of the newly defined tribe Paramysini and of the revalidated Hemimysini Czerniavsky, 1882. A key to the resulting six tribes of the subfamily Mysinae is given.

Carlos Sa Vicente - One of the best experts on this subject based on the ideXlab platform.

Wayne W Price - One of the best experts on this subject based on the ideXlab platform.

  • redescription of deltamysis holmquistae bowman amp orsi 1992 crustacea Mysida Mysidae a mysid species new to the atlantic ocean with observations on the taxonomic status of kochimysis panampunnayil amp biju 2007
    Zootaxa, 2020
    Co-Authors: Matthew J Scripte, Wayne W Price, Richard W Heard
    Abstract:

    The first occurrences of the estuarine mysid Deltamysis holmquistae Bowman Orsi from the Atlantic Ocean are documented from sites on the eastern Florida and northwest Gulf of Mexico (Texas) coasts of North America. Based on examination of type material and specimens from Florida and Texas, considerable morphological variability and additional characters were observed necessitating a rediagnosis of the monotypic genus Deltamysis and a redescription of D. holmquistae. As a result of these new taxonomic criteria, the Indian Ocean species, Kochimysis pillaii Panampunnayil Biju, described from southwest coastal India, is subsumed as a junior synonym of D. holmquistae. The current distribution of this apparently invasive species is probably due to maritime commerce. The geographical location of the endemic or source populations of D. holmquistae remains undetermined; however, its co-occurrence in California with three introduced Asian mysids suggests a northern Indian Ocean or northwest Pacific origin.

  • revision of the siriella brevicaudata species group crustacea Mysida Mysidae from the west indo pacific
    European journal of taxonomy, 2018
    Co-Authors: Mikhail E Daneliya, Wayne W Price, Richard W Heard
    Abstract:

    The Siriella brevicaudata species group from the West Indo-Pacific, defined and designated by Murano & Fukuoka (2008), previously contained five nominal species. In this study we describe five new species in the brevicaudata group: S. bassi sp. nov. from the Bass Strait, southern Australia, S. occulta sp. nov. from the Arabian Gulf, S. muranoi sp. nov. from the coast of Northern Territory, Australia, S. tabaniocula sp. nov. from Ningaloo Reef of Western Australia and Lodestone Reef off Queensland, and S. talbotae sp. nov. from Lizard Island, Queensland, Australia. Furthermore, Siriella hanseni W.M. Tattersall, 1922 from India and S. vincenti W.M. Tattersall, 1927 from South Australia are redescribed based on re-examination of their type material. A re-examination of specimens subsequently attributed to these two species from other geographical regions showed that these were misidentifications, partly representing three of the new species described herein. Siriella gibbosa (Ledoyer, 1970), which was previously synonymized with S. brevicaudata Paulson, 1875 by Bacescu, is revalidated and included within the brevicaudata group. Siriella lacertilis Talbot, 2009, from Lizard Island, is placed within the brevicaudata group. Diagnostic features for all the members of the group and the group itself are updated. As a result of the present study, the brevicaudata group now comprises 12 valid species.

  • global diversity of mysids crustacea Mysida in freshwater
    Hydrobiologia, 2008
    Co-Authors: Mega L Porte, Kenneth Meland, Wayne W Price
    Abstract:

    In this article we present a biogeographical assessment of species diversity within the Mysida (Crustacea: Malacostraca: Peracarida) from inland waters. Inland species represent 6.7% (72 species) of mysid diversity. These species represent three of the four families within the Mysida (LepidoMysidae, StygioMysidae, and Mysidae) and are concentrated in the Palaearctic and Neotropical regions. The inland mysid species distributional patterns can be explained by four main groups representing different freshwater invasion routes: (1) Subterranean Tethyan relicts (24 spp.); (2) Autochthonous Ponto-Caspian endemics (20 spp.); (3) Mysis spp. ‘Glacial Relicts’ (8 spp.); and (4) Euryhaline estuarine species (20 spp.). The center of inland mysid species diversity is the Ponto-Caspian region, containing 24 species, a large portion of which are the results of a radiation in the genus Paramysis.

  • shallow water Mysida crustacea Mysidacea of bahrain arabian gulf species composition abundance and life history characteristics of selected species
    Journal of Natural History, 2004
    Co-Authors: Stephe A Grabe, Wayne W Price, Ebrahim A A Abdulqade, Richard W Heard
    Abstract:

    Mysida were collected from Tubli Bay and the eastern coastline of Bahrain during 1991–1992 incidental to a survey of penaeid prawns. These samples provided an opportunity to assess the species composition of mysids from a nearshore region of the Arabian Gulf—an area in which mysid fauna is poorly known. The 114 beam trawl samples yielded >29 000 mysids. Rhopalophthalmus sp. (>90%), Siriella brevicaudata (5%), Kainomatomysis foxi (1.2%), Siriella sp. A (0.9%) and Indomysis annandalei (0.6%) were the most abundant of 11 species identified. Basic life history variables (carapace length, life stage, brood size) were measured for these five taxa.

  • marsupial developmental stages in americamysis bahia Mysida Mysidae
    Journal of Crustacean Biology, 2002
    Co-Authors: Jennife L Worthamneal, Wayne W Price
    Abstract:

    Abstract The marsupial development of a population of Americamysis (= Mysidopsis) bahia from the Gulf of Mexico was examined at 16°C, 20°C, and 29°C from oviposition to the juvenile stage. Three phases of development, divided into five stages, occurred during in vitro culture of larvae. The embryonic phase (Stage 1) is spherical and surrounded by the egg membrane. The nauplioid phase begins with hatching from the egg membrane and consists of an early (Stage 2) and late (Stage 3) stage. The early nauplioid stage, which is divided into three substages, elongates into a comma-shaped larva and ends with the appearance of thoracic chromatophores. Stage 3 begins with the formation of eye pigment and ends with the shedding of the naupliar cuticle. The subsequent postnauplioid phase has two stages. Stage 4 is characterized by the formation of a yolk protuberance anterodorsal to the carapace. Stage 5 begins with enclosure of the yolk in the carapace and ends with release of the larvae from the marsupium and a molt...

Thomas Remerie - One of the best experts on this subject based on the ideXlab platform.

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    2016
    Co-Authors: Thomas Remerie, Andy Vierstraete, See Profile
    Abstract:

    Phylogeography of an estuarine mysid, Neomysis integer (Crustacea, Mysida), along the north‐east Atlantic coast

  • phylogeography of an estuarine mysid neomysis integer crustacea Mysida along the north east atlantic coasts
    Journal of Biogeography, 2009
    Co-Authors: Thomas Remerie, Andy Vierstraete, Jacques R Vanfletere, Pete H H Weekers, A Vanreusel
    Abstract:

    Aim  The brackish water mysid, Neomysis integer, is one of the most common mysid species along the coasts of the north-east Atlantic. In the present study, the phylogeographical patterns were examined throughout the distribution range of N. integer. In particular, the latitudinal trends in genetic diversity and the distribution of genetic variation were examined in order to elucidate the imprints of the Pleistocene glaciations. Location  North-east Atlantic coasts from the Baltic Sea to the south of Spain. Methods  A total of 461 specimens from 11 populations were analysed by means of single-stranded conformation polymorphism analysis combined with DNA sequencing of a fragment of the mitochondrial cytochrome c oxidase I gene. The genetic structure was examined by using a progression of phylogenetic, demographic and population genetic analyses to elucidate not only the geographical structure, but also the evolutionary history producing that structure. Results  The levels of genetic diversity were relatively uniform throughout the distribution range, with the exception of a decline at the northern and southern edges of distribution. A high heterogeneity was observed between the populations analysed (global ΦST = 0.787). This is caused by the disparate distribution of the cytochrome oxidase I haplotypes, with several population-specific haplotypes. A clear genetic break (2.4% sequence divergence) occurred between the southernmost Guadalquivir population and all other populations. Main conclusions  The present study corroborates the expectations of the genetic patterns typically observed in an estuarine species. The within-population variability was low, whereas a significant (moderate to high) divergence was observed between populations. Phylogeographical analysis revealed that northern populations within the English Channel, North Sea and Baltic Sea are characterized by several widespread haplotypes, while the Irish population and all sites south of the Bay of Biscay consist solely of unique haplotypes. This pattern, combined with the relative high levels of genetic diversity, could be indicative for the presence of a glacial refugium in the English Channel region. Under this scenario N. integer must have survived the Last Glacial Maximum in the palaeoriver system present in that region.

  • evidence of genetic differentiation of the brackish water mysid neomysis integer crustacea Mysida concordant with pleistocene glaciations
    Vie Et Milieu-life and Environment, 2006
    Co-Authors: Thomas Remerie, Andy Vierstraete, E Gysels, Jacques R Vanfletere, A Vanreusel
    Abstract:

    In this study the genealogical relationships and distribution of molecular variation of the mysid Neomysis integer was examined throughout most of its geographical range, in order to interpret phylogeographic patterns. N. integer (Leach, 1814) is one of the most common mysids (Crustacea, Mysida) along the coasts of Europe. It is a hyperbenthic species that typically dominates the brackish part of estuaries and occurs along the northeastern Atlantic from the Baltic Sea to Morocco. Nine samples, comprising 45 individuals, were collected across the species' range of distribution, and sequenced using a segment of 390 base pairs of the mitochondrial cytochrome b gene (cyt b). A clear geographic structuring was found with one common haplotype occurring in most samples, while two samples (the Guadalquivir and Gironde estuary) consist solely of unique variants. At the southern distribution range a remarkable genetic break was observed between the Guadalquivir population and all other samples. These findings are discussed in the perspective of the presence of glacial refugia and postglacial recolonisation routes of low-dispersal organisms along the northeastern Atlantic coasts.

  • morphological differentiation between geographically separated populations of neomysis integer and mesopodopsis slabberi crustacea Mysida
    Hydrobiologia, 2005
    Co-Authors: Thomas Remerie, Tine Ourgois, A Vanreusel
    Abstract:

    Morphological variation was examined in Neomysis integer and Mesopodopsis slabberi, two abundant, low dispersal mysid species (Crustacea, Mysida) along the European coasts. Both species dominate the hyperbenthic communities in the northeast Atlantic, and M. slabberi is also widely distributed in the Mediterranean and Black Sea. Three populations of these species were sampled throughout their distribution range; samples of N. integer were collected in the northeast Atlantic Eems-Dollard, Gironde and Guadalquivir estuaries; in the case of M. slabberi, mysids were sampled in two northeast Atlantic estuaries (Eems-Dollard and Guadalquivir) and one Mediterranean site (Ebro Delta). A total of 12 morphometric and 2 meristic characters were measured from 30–64 mysids per sample. Multivariate analysis showed clear morphometric differences between populations of both species. The morphological differentiation within M. slabberi was highly concordant with the available genetic data from mitochondrial loci, pointing to a large divergence between the Atlantic and Mediterranean populations. However, due to some overlap of individuals between the different populations, the present morphometric analysis does not suffice to assign the different populations to a separate (sub)species status. In the case of N. integer, the morphometric patterns showed a divergence of the Gironde population. Differentiation of populations within this mysid, as in M. slabberi, were mainly related to eye and telson morphology. Potential interactions of the mysid morphology and environmental conditions are discussed.

  • phylogenetic relationships within the Mysidae crustacea peracarida Mysida based on nuclear 18s ribosomal rna sequences
    Molecular Phylogenetics and Evolution, 2004
    Co-Authors: Thomas Remerie, B Bulckaen, J Calderon, T Deprez, Jan Mees, Jacques R Vanfleteren, Ann Vanreusel, Andy Vierstraete, Magda Vincx, Karl J Wittmann
    Abstract:

    Species of the order Mysida (Crustacea, Peracarida) are shrimp-like animals that occur in vast numbers in coastal regions of the world. The order Mysida comprises 1053 species and 165 genera. The present study covers 25 species of the well-defined Mysidae, the most speciose family within the order Mysida. 18S rRNA sequence analysis confirms that the subfamily Siriellinae is monophyletic. On the other hand the subfamily Gastrosaccinae is paraphyletic and the subfamily Mysinae, represented in this study by the tribes Mysini and Leptomysini, consistently resolves into three independent clades, and hence is clearly not monophyletic. The tribe Mysini is not monophyletic either, and forms two clades of which one appears to be closely related to the Leptomysini. Our results are concordant with a number of morphological differences urging a taxonomic revision of the Mysidae.

Jaesung Rhee - One of the best experts on this subject based on the ideXlab platform.

  • complete mitochondrial genome of the marine mysid siriella sp crustacea Mysida Mysidae
    Mitochondrial DNA Part B, 2019
    Co-Authors: Dohee Lee, Omi Kim, Jaesung Rhee
    Abstract:

    AbstractThe complete mitochondrial genome of the marine mysid, Siriella sp. was obtained by conventional polymerase chain reaction (PCR) method. Total length of Siriella sp. mitochondrial genome wa...

  • constant exposure to environmental concentrations of the antifouling biocide sea nine retards growth and reduces acetylcholinesterase activity in a marine mysid
    Aquatic Toxicology, 2018
    Co-Authors: Jeong-wan Do, Md Niamul Haque, Jaesung Rhee, Junghoon Kang, Jeehyun Jung
    Abstract:

    Abstract Sea-Nine (4,5-dichloro-2-n-octyl-4-isothiazoline3-one; DCOIT) antifoulant has been widely used owing to its broad spectrum of biocide activity against major fouling organisms. In this study, several physiological parameters of a marine mysid were analyzed upon exposure to sublethal environmental concentrations (1 and 100 ng L−1) of Sea-Nine in two exposure conditions, intermittent (weekly; once per week) and constant (daily; once per 24 h) exposure, for 4 weeks. In both experimental conditions, growth retardation, acetylcholinesterase (AChE) activity, glutathione S-transferase (GST) activity, and number of newborn juveniles as second generation, together with their survival were measured. Morphometric parameters of total body, antennal scale, exopod, endopod, and telson were significantly retarded by 22%, 14%, 13%, and 24%, respectively, by daily exposure to 100 ng L−1 Sea-Nine for 4 weeks. Significant inhibition of AChE activity was observed at week 4 in the 100 ng L−1 daily Sea-Nine-exposed groups, whereas no significant GST activity was measured at the same experimental conditions. Inhibition of AChE activity would be associated with impairment of cholinergic system and may adversely modulate growth parameters of the mysid. The number of newly hatched juveniles from females that were exposed daily to 100 ng L−1 Sea-Nine was significantly lower than that of the control. Although no significant differences were observed between survival percentages of newborn juveniles for 30 days, mortality (NOEC and LC50) increased in the surviving offspring from the 100 ng L−1-exposed 1st generation of mysids. These findings suggested that constant exposure to Sea-Nine has detrimental effects on the growth parameters of marine mysids with inhibition of AChE activity.

  • effects of polychlorinated biphenyls on survival growth and offspring production of the mysid crustacean neomysis awatschensis
    Toxicology and Environmental Health Sciences, 2018
    Co-Authors: Jaesung Rhee, Manoharan Saravanan
    Abstract:

    Polychlorinated biphenyls (PCBs) are recognized as persistent organic pollutants (POPs) and environmental contaminants with their persistency, bioaccumulation potential, and toxicity to organisms. Our study was aimed to measure the sublethal effects of PCBs on the survival and growth rates in a marine mysid. Survival of juvenile and adult marine mysids was measured upon different concentrations of PCBs (i.e. 0.01, 0.05, 0.1, 0.5, and 1 ppb) for 4 weeks. The numbers of offspring per survived individual female and their survival rate were measured. Effect of waterborne PCBs on growth was determined by measuring the total length, antennal scale, and three parameters of uropod such as exopod, endopod, and telson. The results showed that 0.5 and 1 ppb of PCBs induced over 50% mortality in the juvenile and adult marine mysids, respectively. Of survived mysids, the number of newly hatched juvenile was significantly decreased from females exposed to 0.1 and 0.5 ppb. The survival of newborn juveniles was also significantly decreased from females exposed to 0.05, 0.1, and 0.5 ppb of PCBs. Growth parameters such as total body length, lengths of antennal scale, exopod, endopod, and telson were significantly affected in the 0.05, 0.1 and 0.5 ppb of PCBs-exposed groups during 4 weeks exposure. Our results indicate the toxic effects of waterborne PCBs on the survival and growth of juvenile and adult marine mysids with highlighting persistent effects of PCBs on second generations.

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