151 research outputs found

    Qualitative and quantitative analyses of the composition and dynamics of light harvesting complex I in eukaryotic photosynthesis

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    The photosynthetic apparatus of eukaryotic organisms posseses a remarkable ability to adapt to ever changing light conditions and other environmental cues. In the present study, the compositon of plant light harvesting complex I (LHCI), its association with photosystem I (PSI) and its dynamic changes upon iron deficiency as one environmental variable were investigated by means of qualitative and quantitative proteome analyses using Chlamydomonas reinhardtii and Lycopersicon esculentum as model organisms. With stable isotope labelling and mass spectrometry, C. reinhardtii LHCI was shown to be heterogeneously composed with a total number of between six and eight proteins. In a study comparing the photosynthetic apparatus under iron sufficient and iron deficient conditions, N-terminal processing of Lhca3 was shown to be a key event in the remodelling of PSI-LHCI into a dissipative conformation upon iron deficiency. The results show that the heterogeneity and plasicity of LHCI enable the photosynthetic apparatus to function optimally under varying environmental conditions

    Plio-Pleistocene sea level and temperature fluctuations in the northwestern Pacific promoted speciation in the globally-distributed flathead mullet Mugil cephalus

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    <p>Abstract</p> <p>Background</p> <p>The study of speciation in the marine realm is challenging because of the apparent absence of physical barriers to dispersal, which are one of the main drivers of genetic diversity. Although phylogeographic studies using mitochondrial DNA (mtDNA) information often reveal significant genetic heterogeneity within marine species, the evolutionary significance of such diversity is difficult to interpret with these markers. In the northwestern (NW) Pacific, several studies have emphasised the potential importance of sea-level regression during the most recent glaciations as a driver of genetic diversity in marine species. These studies have failed, however, to determine whether the period of isolation was long enough for divergence to attain speciation. Among these marine species, the cosmopolitan estuarine-dependent fish <it>Mugil cephalus </it>represents an interesting case study. Several divergent allopatric mtDNA lineages have been described in this species worldwide, and three occur in sympatry in the NW Pacific.</p> <p>Results</p> <p>Ten nuclear microsatellites were surveyed to estimate the level of genetic isolation of these lineages and determine the role of sea-level fluctuation in the evolution of NW Pacific <it>M. cephalus</it>. Three cryptic species of <it>M. cephalus </it>were identified within this region (NWP1, 2 and 3) using an assignment test on the microsatellite data. Each species corresponds with one of the three mtDNA lineages in the COI phylogenetic tree. NWP3 is the most divergent species, with a distribution range that suggests tropical affinities, while NWP1, with a northward distribution from Taiwan to Russia, is a temperate species. NWP2 is distributed along the warm Kuroshio Current. The divergence of NWP1 from NWP2 dates back to the Pleistocene epoch and probably corresponds to the separation of the Japan and China Seas when sea levels dropped. Despite their subsequent range expansion since this period of glaciation, no gene flow was observed among these three lineages, indicating that speciation has been achieved.</p> <p>Conclusions</p> <p>This study successfully identified three cryptic species in <it>M. cephalus </it>inhabiting the NW Pacific, using a combination of microsatellites and mitochondrial genetic markers. The current genetic architecture of the <it>M. cephalus </it>species complex in the NW Pacific is the result of a complex interaction of contemporary processes and historical events. Sea level and temperature fluctuations during Plio-Pleistocene epochs probably played a major role in creating the marine species diversity of the NW Pacific that is found today.</p

    Selfish drive can trump function when animal mitochondrial genomes compete.

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    Mitochondrial genomes compete for transmission from mother to progeny. We explored this competition by introducing a second genome into Drosophila melanogaster to follow transmission. Competitions between closely related genomes favored those functional in electron transport, resulting in a host-beneficial purifying selection. In contrast, matchups between distantly related genomes often favored those with negligible, negative or lethal consequences, indicating selfish selection. Exhibiting powerful selfish selection, a genome carrying a detrimental mutation displaced a complementing genome, leading to population death after several generations. In a different pairing, opposing selfish and purifying selection counterbalanced to give stable transmission of two genomes. Sequencing of recombinant mitochondrial genomes showed that the noncoding region, containing origins of replication, governs selfish transmission. Uniparental inheritance prevents encounters between distantly related genomes. Nonetheless, in each maternal lineage, constant competition among sibling genomes selects for super-replicators. We suggest that this relentless competition drives positive selection, promoting change in the sequences influencing transmission

    Is the geographic variation in size of American eel Anguilla rostrata elvers due to genetic differentiation?

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    Elvers of the American eel Anguilla rostrata collected along the east coasts of North America and Haiti exhibited geographic variations in age and size at time of arrival at estuaries and in duration of glass eels as well as their growth rate, based on a previous otolith study. They were able to divide into two groups: the northern large size group and the southern small size group. Thus, this study aims to understand whether the geographic variation in size of elvers is due to genetic differentiation by using microsatellite DNA. A total of 216 elvers of A.rostrata, collected from 6 estuaries along the Atlantic coasts of Central and North America,were used for the microsatellite DNA (6 loci) analysis. The genetic analyses indicated that there were no geographical isolation in genetic structures between the northern and southern groups (FCT = -0.00101; P = 0.507), although there was a weak significant difference among sampling locations (FST = 0.00538; P < 0.05). The differences were patchy and did not correspond to the geographic difference in size of elvers. Integrating the preious otolith daily growth increment (ring) analyses and genetic data suggested that the geographic variation in size of the elver at estuarine arrival between these two groups was not due to genetic differentiation but to the distance of the estuaries from the spawning ground and latitudinal difference in coastal water temperatures

    Gobiidae

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    FAMILY Gobiidae Amblygobius buanensis Herre, 1927; Native; Buan Goby; Found in rivers of Mindanao Islands; Kottelat 2013; LC Awaous grammepomus (Bleeker, 1849); Native; Scribbled Goby; Found in river basins across the Philippines; Kottelat 2013; LC Awaous litturatus (Steindachner, 1861); Native; Found in river basins across the Philippines; NMW 29507, CAS-SU 23362-63; Kottelat 2013; DD Awaous melanocephalus (Bleeker, 1849); Native; Largesnout Goby; Found in river basins across the Philippines; Kottelat 2013, DD Awaous ocellaris (Broussonet, 1782); Native; Found in river basins across the Philippines; USNM 139338, KAUM 80840; Motomura et al. 2017; LC Bathygobius fuscus (Rüppell, 1830); Native; Dusky Frillgoby; Found in river basins across the Philippines; Kottelat 2013; LC Brachygobius aggregatus Herre, 1940; Native; Schooling Bumblebee Goby; Found in river basins across the Philippines; CAS-SU 18082; Kottelat 2013; DD Caecogobius cryptophthalmus Berti & Ercolini, 1991; Endemic; Endemic to Calbiga Cave System, Samar Island; MSNVR 1262; Kottelat 2013, Larson & Husana 2018; CR Caecogobius personatus Larson & Husana 2018; Endemic; Endemic to Mindanao Island; PNM 15353, ZRC 56329; Larson & Husana 2018; EN Callogobius hasseltii (Bleeker, 1851); Native; Hasselt’s Goby; Found in river basins across the Philippines; Kottelat 2013; NE Caragobius urolepis (Bleeker, 1852); Native; Scaleless Worm Goby; Found in river basins across the Philippines; USNM 435245; Murdy & Shibukawa K 2003; LC Cristatogobius nonatoae (Ablan, 1940); Native; Found in rivers of Luzon Island; Kottelat 2013; NE Eugnathogobius illotus (Larson, 1999); Native; Found in river basins across the Philippines; Kottelat 2013; LC Exyrias volcanus (Herre, 1927); Endemic; Bia; Endemic to Lake Taal, Luzon Island; Kottelat 2013; CR Favonigobius reichei (Bleeker, 1854); Native; Indo-Pacific Tropical Sand Goby; Found in river basins across the Philippines; Kottelat 2013; LC Glossogobius aureus Akihito & Meguro, 1975; Native; Golden Tank Goby; Found in river basins across the Philippines; USNM 438151; Aquino et al. 2011, Motomura et al. 2017; LC Glossogobius bicirrhosus (Weber, 1894); Native; Bearded Flathead Goby; Found in river basins across the Philippines; USNM 55622; Herre 1953; LC Glossogobius celebius (Valenciennes, 1837); Native; Celebes Goby; Found in river basins across the Philippines; FMNH 40597; Herre 1953, Abroguena et al. 2020; LC Glossogobius circumspectus (Macleay, 1883); Native; Circumspect Goby; Found in river basins across the Philippines; Herre 1953; LC Glossogobius clitellus Hoese & Allen, 2012; Native; Found in river basins across the Philippines; Herre 1953; LC Glossogobius giuris (Hamilton, 1822); Native; Tank Goby; Found in river basins across the Philippines; ANSP 122164; Herre 1953, Kottelat 2013; LC Glossogobius obscuripinnis (Peters, 1868); Native; Found in river basins of Luzon Island; ZMB 6498; Kottelat 2013; DD Gobiopterus brachypterus (Bleeker, 1855); Native; Found in river basins of Luzon Island; USNM 260677-78; Kottelat 2013; DD Gobiopterus lacustris (Herre, 1927); Endemic; Lacustrine Goby; Endemic to Luzon Island; ZMA 115798; Aquino et al. 2011, Kottelat 2013; DD Gobiopterus stellatus (Herre, 1927); Endemic; Dwarf Freshwater Goby; Endemic to Luzon Island; Kottelat 2013; DD Gobiosoma pallida Herre, 1934; Native; Found in river basins of Mindanao Island, maybe a synonym of Cryptocentroides insignis; CAS-SU 28609; Kottelat 2013; DD Gobitrichinotus radiocularis Fowler, 1943; Native; Found in river basins across the Philippines; USNM 99549; Kottelat 2013; LC Hemigobius hoevenii (Bleeker, 1851); Native; Banded Mullet Goby; Found in river basins across the Philippines; Kottelat 2013; LC Lentipes armatus Sakai & Nakamura, 1979; Native; Peppermint Armour Goby; Found in river basins across the Philippines; ROM 73752; Maeda et al., 2021a; NE Lentipes kijimuna Maeda & Kobayashi, 2021; Native; Kijimuna goby; Found in rivers of Visayas Islands; Maeda et al. 2021a; NE Lentipes mindanaoensis Chen, 2004; Endemic; Endemic to river basins of Eastern Mindanao Island; NMMB P 4821; Maeda et al. 2021a; DD Lentipes palawanirufus Maeda & Palla, 2021; Endemic; Palawan Lentipes Goby; Endemic to river basins of Palawan Island; NSMT-P 136936; Maeda et al. 2021b; NE Mangarinus waterousi Herre, 1943; Native; Found in river basins of Luzon, Visayas and Mindanao Islands; CAS-SU 36817; Kottelat 2013; DD Mistichthys luzonensis Smith, 1902; Endemic; Sinarapan; Endemic to Lakes and river basins of Albay Peninsula, Southern Luzon Island; USNM 50303-04; Herre 1953, Kottelat 2013; VU Mugilogobius cagayanensis (Aurich, 1938); Endemic; Endemic to lakes of Cagayan Island, Sulu Archipelago, Mindanao; ZMH H420; Kottelat 2013; EN Mugilogobius mertoni (Weber, 1911); Native; Chequered Mangrove Goby; Found in river basins of Luzon and Visayas Islands; CAS-SU 39885; Kottelat 2013; LC Oligolepis acutipennis (Valenciennes, 1837); Native; Sharptail Goby; Found in river basins across the Philippines; USNM 241803; Herre 1953; LC Oligolepis stomias (Smith, 1941); Native; Found in wetlands and rivers of Luzon, Visayas, Mindanao Islands; Kottelat 2013; DD Oxyurichthys ophthalmonema (Bleeker, 1856); Native; Eyebrow Goby; Found in river basins across the Philippines; CAS-SU 26336; Herre 1953; LC Pandaka pygmaea Herre, 1927; Native; Dwarf Pygmy Goby; Found in rivers of Southern Luzon and Northern Palawan; CAS-SU 23761, CAS-SU 18143; Herre 1953; DD Pandaka trimaculata Akihito & Meguro, 1975; Native; Found in lakes and river basins of Palawan, Visayas and Mindanao Islands; PNM 5534-5536; Kottelat 2013; NE Psammogobius biocellatus (Valenciennes, 1837); Native; Sleepy Goby; Found in river basins across the Philippines; USNM 51948; Herre 1953, Ikejima 2006; LC Pseudogobiopsis oligactis (Bleeker, 1875); Native; Found in river basins across the Philippines; Herre 1953; LC Pseudogobius javanicus (Bleeker, 1856); Native; Found in river basins across the Philippines; CAS-SU 38641-42; Larson & Hammer 2021; NE Pseudogobius melanosticta (Day, 1876); Native; Black-Spotted Snubnose Goby; Found in rivers across the Philippines; Larson & Hammer 2021; LC Pseudogobius poicilosoma (Bleeker, 1849); Native; Northern Fatnose Goby; Found in river basins across the Philippines; Larson & Hammer 2021; LC Redigobius balteatus (Herre, 1935); Native; Rhinohorn Goby; Found in river basins across the Philippines; USNM 241868; Kottelat 2013; LC Redigobius bikolanus (Herre, 1927); Native; Speckled Goby; Found in river basins across the Philippines; USNM 341235, CAS-SU 30967; Kottelat 2013, Corpus et al. 2015; LC Redigobius chrysosoma (Bleeker, 1875); Native; Found in river basins across the Philippines; Kottelat 2013; LC Redigobius dispar (Peters, 1868); Native; Found in river basins across the Philippines; Kottelat 2013; VU Redigobius oyensi (de Beaufort, 1913); Native; Found in river basins across the Philippines; Kottelat 2013; LC Redigobius tambujon (Bleeker, 1854); Native; Found in river basins across the Philippines; USNM 263429; Kottelat 2013; LC Rhinogobius brunneus (Temminck & Schlegel, 1845); Native; Found in river basins across the Philippines; USNM 315665; Kottelat 2013; DD Rhinogobius bucculentus (Herre, 1927); Endemic; Endemic to river basins of Northern Luzon Island; CAS-SU 26366; Kottelat 2013, Maeda et al. 2021b; VU Rhinogobius carpenteri Seale, 1910; Endemic; Kuchu; Endemic to river basins of Northern Luzon Island; CAS-SU 26367, KIZ 2016003044; Kottelat 2013, Maeda et al. 2021b; DD Rhinogobius estrellae Maeda, Kunishima & Palla 2021; Endemic; Estrella Goby; Endemic to river basins of Palawan Island; NSMT-P 140091; Maeda et al. 2021b; NE Rhinogobius philippinus Herre, 1927; Endemic; Lizard Goby; Endemic to river basins across the Philippines; CAS-SU 38601; Kottelat 2013, Maeda et al. 2021b; DD Rhinogobius tandikan Maeda, Kunishima & Palla 2021; Endemic; Tandikan Goby; Endemic to river basins of Palawan Island; NSMT-P 140093; Maeda et al. 2021b; NE Schismatogobius ampluvinculus Chen, Shao & Fang, 1995; Native; Found in river basins across the Philippines; Herre 1953, Kottelat 2013; DD Schismatogobius bruynisi de Beaufort, 1912; Native; Found in river basins across the Philippines; CAS-SU 29987; Herre 1953, Kottelat 2013; LC Schismatogobius deraniyagalai Kottelat & Pethiyagoda, 1989; Native; Redneck Goby; Found in river basins across the Philippines; Herre 1953, Kottelat 2013; LC Schismatogobius insignis (Herre, 1927); Native; Found in river basins across the Philippines; CAS-SU 30968; Herre 1953, Kottelat 2013; EN Schismatogobius marmoratus (Peters, 1868); Native; Found in river basins across the Philippines; ZMB 6756; Herre 1953 Kottelat 2013; LC Schismatogobius roxasi Herre, 1936; Native; Found in rivers of Visayas Islands; CAS-SU 30968; Herre 1953; NE Schismatogobius saurii Keith, Lord, Hadiaty & Hubert, 2017; Native; Found in coastal rivers across the Philippines; Keith et al. 2017; LC Sicyopterus cynocephalus (Valenciennes, 1837); Native; Cleft-Lipped Goby; Found in river basins across the Philippines; ZMUC 20922; Herre 1953, Kottelat 2013; LC Sicyopterus lagocephalus (Pallas, 1770); Native; Red-Tailed Goby; Found in river basins across the Philippines; CAS-SU 38607, MNHN-IC 2015-0318; Herre 1953, Kottelat 2013, Opiso et al. 2014, Garcia et al. 2018; LC Sicyopterus longifilis de Beaufort, 1912; Native; Threadfin Goby; Found in river basins across the Philippines; FMNH 40587; Herre 1953, Kottelat 2013; LC Sicyopterus macrostetholepis (Bleeker, 1853); Native; Found in river basins across the Philippines; Herre 1953, Kottelat 2013; DD Sicyopterus micrurus (Bleeker, 1853); Native; Clinging goby; Found in river basins across the Philippines; USNM 99637; Kottelat 2013; DD Sicyopus auxilimentus Watson & Kottelat, 1994; Native; Found in rivers of Visayas Island; ZRC 38286; Kottelat 2013; DD Sicyopus zosterophorus (Bleeker, 1856); Native; Found in river basins across the Philippines; Kottelat 2013; LC Silhouettea flavoventris (Herre, 1927); Endemic; Endemic to Lake Taal, Luzon Island; Kottelat 2013, Suzuki, Shibukawa & Aizawa, 2017; CR Stenogobius genivittatus (Valenciennes, 1837); Native; Chinstripe Goby; Found in river basins across the Philippines; Kottelat 2013; LC Stenogobius kyphosus Watson, 1991; Endemic; Found in river basin of Visayas and Mindanao Island; USNM 99878; Kottelat 2013; VU Stenogobius ophthalmoporus (Bleeker, 1853); Native; Found in river basins across the Philippines; MNHN 0000-6159, ZMB 6679-80; Kottelat 2013; LC Stigmatogobius elegans Larson, 2005; Endemic; Endemic to river basin of Northern Luzon Island; USNM 314469; Kottelat 2013; EN Stiphodon atropurpureus (Herre, 1927); Native; Found in river basins across the Philippines; CAS-SU 81763; Kottelat 2013; LC Stiphodon palawanensis Maeda & Palla, 2015; Native; Endemic to river basins of Palawan Island; NSMT-P 45091-2; Maeda & Palla 2015; LC Stiphodon pulchellus (Herre, 1927); Endemic; Endemic to river basins of Palawan and Visayas Islands; CAS-SU 26360; Kottelat 2013, Maeda & Palla 2015; VU Stiphodon semoni Weber, 1895; Native; Found in rivers of Luzon, Visayas and Mindanao; Kottelat 2013; LC Stiphodon surrufus Watson & Kottelat, 1995; Native; Found in river basins of Visayas and Mindanao Islands; ZRC 38394; Kottelat 2013; LC Taenioides anguillaris (Linnaeus, 1758); Native; Eel Worm Goby; USNM 405962-5; Kottelat 2013; LC Taenioides caniscapulus Roxas & Ablan, 1938; Endemic; Endemic to rivers of Visayas Islands; Kottelat 2013; NE Taenioides cirratus (Blyth, 1860); Native; Bearded Worm Goby; Found in river basins across the Philippines; CAS-SU 29697, USNM 243405; Kottelat 2013; DD Taenioides gracilis (Valenciennes, 1837); Native; Slender Eel Goby; Found in river basins across the Philippines; Kottelat 2013; LC Tamanka siitensis Herre, 1927; Endemic; Endemic to Mindanao Island; USNM 87128; Kottelat 2013; EN Trypauchenichthys typus Bleeker, 1860; Native; Typical Eelgoby; Found in river basins across the Philippines; CAS-SU 20261; Kottelat 2013; DD Yongeichthys nebulosus (Forsskål 1775); Native; Found in river basins across the Philippines; CAS-SU 26236; Kottelat 2013; NEPublished as part of Jamandre, Brian Wade, 2023, Freshwater fishes of the Philippines: a provisional checklist, pp. 151-181 in Zootaxa 5301 (2) on pages 167-170, DOI: 10.11646/zootaxa.5301.2.1, http://zenodo.org/record/803027

    Kuhliidae Jordan & Evermann 1896

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    FAMILY Kuhliidae &lt;p&gt; &lt;i&gt;Kuhlia marginata&lt;/i&gt; (Cuvier, 1829); Native; Dark-Margined Flagtail; Found in river basins across the Philippines; USNM 385606; Herre 1953; LC&lt;/p&gt; &lt;p&gt; &lt;i&gt;Kuhlia rupestris&lt;/i&gt; Lacep&egrave;de, 1802; Native; Rock Flagtail; Found in river basins across the Philippines; USNM 309348; Herre 1953; LC&lt;/p&gt;Published as part of &lt;i&gt;Jamandre, Brian Wade, 2023, Freshwater fishes of the Philippines: a provisional checklist, pp. 151-181 in Zootaxa 5301 (2)&lt;/i&gt; on page 163, DOI: 10.11646/zootaxa.5301.2.1, &lt;a href="http://zenodo.org/record/8030274"&gt;http://zenodo.org/record/8030274&lt;/a&gt

    Soleidae

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    FAMILY Soleidae Pardachirus poropterus (Bleeker, 1851); Native; Estuary Sole; Found in coastal wetlands across the Philippines; USNM 56164; Herre 1953; DDPublished as part of Jamandre, Brian Wade, 2023, Freshwater fishes of the Philippines: a provisional checklist, pp. 151-181 in Zootaxa 5301 (2) on page 174, DOI: 10.11646/zootaxa.5301.2.1, http://zenodo.org/record/803027
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