Onset of Buccal Pumping in Catshark Embryos: How Breathing Develops in the Egg Capsule
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{"title"=>"Onset of buccal pumping in catshark embryos: How breathing develops in the egg capsule", "type"=>"journal", "authors"=>[{"first_name"=>"Taketeru", "last_name"=>"Tomita", "scopus_author_id"=>"47562221700"}, {"first_name"=>"Masaru", "last_name"=>"Nakamura", "scopus_author_id"=>"56393451500"}, {"first_name"=>"Keiichi", "last_name"=>"Sato", "scopus_author_id"=>"56355232700"}, {"first_name"=>"Hiroko", "last_name"=>"Takaoka", "scopus_author_id"=>"56394071400"}, {"first_name"=>"Minoru", "last_name"=>"Toda", "scopus_author_id"=>"56985344300"}, {"first_name"=>"Junro", "last_name"=>"Kawauchi", "scopus_author_id"=>"37112415700"}, {"first_name"=>"Kazuhiro", "last_name"=>"Nakaya", "scopus_author_id"=>"7103182856"}], "year"=>2014, "source"=>"PLoS ONE", "identifiers"=>{"pui"=>"600198808", "issn"=>"19326203", "doi"=>"10.1371/journal.pone.0109504", "scopus"=>"2-s2.0-84908192078", "pmid"=>"25329313", "sgr"=>"84908192078"}, "id"=>"03ebc037-96da-3b1b-9ef8-62868cf4babd", "abstract"=>"Respiration in fishes involves buccal pumping, which is characterized by the generation of nearly continuous water flow over the gills because of the rhythmic expansion/compression of the pharyngeal cavity. This mechanism is achieved by the functions of the vascular, skeletal, and muscular systems. However, the process by which the embryo establishes the mechanism remains a mystery. Morphological and kinematical observations on captive cloudy catsharks, Scyliorhinus torazame, have suggested that the embryo starts buccal pumping just before the respiratory slits open on the egg capsule. During the pre-opening period, the embryo acquires oxygen mainly via the external gill filaments. After slit opening, respiration of the embryo involves buccal pumping to pass water over the \"internal gills.\" The onset of buccal pumping accompanies four morphological changes: (1) regression of the external gill filaments, (2) development of blood vessels within the \"internal gills,\" (3) completion of the development of hyoid skeletal and muscular elements, and (4) development of the oral valve. A previous study showed that buccal pumping allows the embryo to actively regulate oxygen intake by changing the pumping frequency. Thus, establishment of buccal pumping in the egg capsule is probably important for embryo survival in the unstable oxygen environment of the egg capsule after slit opening.", "link"=>"http://www.mendeley.com/research/onset-buccal-pumping-catshark-embryos-breathing-develops-egg-capsule", "reader_count"=>12, "reader_count_by_academic_status"=>{"Professor > Associate Professor"=>1, "Researcher"=>2, "Student > Ph. D. Student"=>1, "Student > Master"=>6, "Student > Bachelor"=>1, "Professor"=>1}, "reader_count_by_user_role"=>{"Professor > Associate Professor"=>1, "Researcher"=>2, "Student > Ph. D. Student"=>1, "Student > Master"=>6, "Student > Bachelor"=>1, "Professor"=>1}, "reader_count_by_subject_area"=>{"Agricultural and Biological Sciences"=>12}, "reader_count_by_subdiscipline"=>{"Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>12}}, "reader_count_by_country"=>{"France"=>1}, "group_count"=>0}

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Figshare

  • {"files"=>["https://ndownloader.figshare.com/files/1724694"], "description"=>"<p>A. Digitized points for quantifying the movement of mouth and pharyngeal regions. Descriptions of each measurement point (a, a′, b, and b′) are shown in Material and method section. Scale bar = 2 mm. B. Changes of amount of mouth opening (above) and head width at the first gill slit (below) over time. Gray areas in above figure indicate the duration of mouth closing that represents the compression phase of oro-pharyngeal cavity. Arrows in below figure indicate the timing of the opening of the first gill slit.</p>", "links"=>[], "tags"=>["egg capsule", "Egg Capsule Respiration", "slit opening", "buccal", "embryo", "gill filaments"], "article_id"=>1210238, "categories"=>["Biological Sciences"], "users"=>["Taketeru Tomita", "Masaru Nakamura", "Keiichi Sato", "Hiroko Takaoka", "Minoru Toda", "Junro Kawauchi", "Kazuhiro Nakaya"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0109504.g001", "stats"=>{"downloads"=>4, "page_views"=>27, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Buccal_pumping_of_58_6_mm_TL_embryo_of_the_cloudy_catshark_Scyliorhinus_torazame_in_ventral_view_/1210238", "title"=>"Buccal pumping of 58.6 mm TL embryo of the cloudy catshark (<i>Scyliorhinus torazame</i>) in ventral view.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-10-20 02:55:30"}
  • {"files"=>["https://ndownloader.figshare.com/files/1724717"], "description"=>"<p>A. 19.2 mm TL. B. 21.9 mm TL. C. 27.2 mm TL. D. 43.6 mm TL. E. 53.3 mm TL. F. 75.1 mm TL. Scale bars = 2 mm. eg = external gill filaments, sg = spiracular gill filaments.</p>", "links"=>[], "tags"=>["egg capsule", "Egg Capsule Respiration", "slit opening", "buccal", "embryo", "gill filaments"], "article_id"=>1210261, "categories"=>["Biological Sciences"], "users"=>["Taketeru Tomita", "Masaru Nakamura", "Keiichi Sato", "Hiroko Takaoka", "Minoru Toda", "Junro Kawauchi", "Kazuhiro Nakaya"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0109504.g002", "stats"=>{"downloads"=>0, "page_views"=>17, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Morphological_change_of_head_and_pharyngeal_regions_through_ontogeny_/1210261", "title"=>"Morphological change of head and pharyngeal regions through ontogeny.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-10-20 02:55:30"}
  • {"files"=>["https://ndownloader.figshare.com/files/1724765"], "description"=>"<p>A. Lateral view of the head region of a cloudy catshark embryo (left), and schematic diagram of the embryonic gill structure (right). Posterior-side gill lamellae (external gill filaments) are elongated and extend out of the gill slit, whereas lamellae on the anterior side develop and remain inside the gill slit. B. Histological thin sections of the anterior-side gill lamellae on the first gill arches of 23.2 mm TL (i), 27.2 mm TL (ii), 32.8 mm TL (iii), 39.8 mm TL (iv), and 53.5 mm TL (v) embryos. Sections were made along the dotted line (x–x′) in figure of A, right side. Black triangles represent efferent lamellar arteries; white triangle, afferent lamellar arteries. BM represents basal membrane. Asterisks (*) in the efferent and afferent lamellar arteries represent red blood cells. The images in (iii), (iv) and (v) are horizontally flipped to allow for easier comparison. Scale bar = 50 µm. C. Close-up view of the anterior-side gill lamellas of 25.8 mm TL (i), 32.8 mm TL (ii), 39.8 mm TL (iii), and 53.5 mm TL (iv) embryos. Basement membrane (bm) was stained in purple with PAS staining in narrow space beneath the single- or double-layered epithelium cells (i). Secondary gill lamellas (arrows) and blood cells (*) in the blood vessels present within the gill lamella in (iii) and (iv). Scale bars = 10 µm.</p>", "links"=>[], "tags"=>["egg capsule", "Egg Capsule Respiration", "slit opening", "buccal", "embryo", "gill filaments"], "article_id"=>1210302, "categories"=>["Biological Sciences"], "users"=>["Taketeru Tomita", "Masaru Nakamura", "Keiichi Sato", "Hiroko Takaoka", "Minoru Toda", "Junro Kawauchi", "Kazuhiro Nakaya"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0109504.g005", "stats"=>{"downloads"=>0, "page_views"=>17, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Development_of_anterior_side_gill_lamellae_/1210302", "title"=>"Development of anterior-side gill lamellae.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-10-20 02:55:30"}
  • {"files"=>["https://ndownloader.figshare.com/files/1724852", "https://ndownloader.figshare.com/files/1724853"], "description"=>"<div><p>Respiration in fishes involves buccal pumping, which is characterized by the generation of nearly continuous water flow over the gills because of the rhythmic expansion/compression of the pharyngeal cavity. This mechanism is achieved by the functions of the vascular, skeletal, and muscular systems. However, the process by which the embryo establishes the mechanism remains a mystery. Morphological and kinematical observations on captive cloudy catsharks, <i>Scyliorhinus torazame</i>, have suggested that the embryo starts buccal pumping just before the respiratory slits open on the egg capsule. During the pre-opening period, the embryo acquires oxygen mainly via the external gill filaments. After slit opening, respiration of the embryo involves buccal pumping to pass water over the “internal gills.” The onset of buccal pumping accompanies four morphological changes: (1) regression of the external gill filaments, (2) development of blood vessels within the “internal gills,” (3) completion of the development of hyoid skeletal and muscular elements, and (4) development of the oral valve. A previous study showed that buccal pumping allows the embryo to actively regulate oxygen intake by changing the pumping frequency. Thus, establishment of buccal pumping in the egg capsule is probably important for embryo survival in the unstable oxygen environment of the egg capsule after slit opening.</p></div>", "links"=>[], "tags"=>["egg capsule", "Egg Capsule Respiration", "slit opening", "buccal", "embryo", "gill filaments"], "article_id"=>1210385, "categories"=>["Biological Sciences"], "users"=>["Taketeru Tomita", "Masaru Nakamura", "Keiichi Sato", "Hiroko Takaoka", "Minoru Toda", "Junro Kawauchi", "Kazuhiro Nakaya"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0109504.s001", "https://dx.doi.org/10.1371/journal.pone.0109504.s002"], "stats"=>{"downloads"=>7, "page_views"=>6, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Onset_of_Buccal_Pumping_in_Catshark_Embryos_How_Breathing_Develops_in_the_Egg_Capsule_/1210385", "title"=>"Onset of Buccal Pumping in Catshark Embryos: How Breathing Develops in the Egg Capsule", "pos_in_sequence"=>0, "defined_type"=>4, "published_date"=>"2014-10-20 02:55:30"}
  • {"files"=>["https://ndownloader.figshare.com/files/1724727"], "description"=>"<p>The above figures represent the ventral view of the head and pharyngeal region. 1st eg = external gill filaments on the first gill slit.</p>", "links"=>[], "tags"=>["egg capsule", "Egg Capsule Respiration", "slit opening", "buccal", "embryo", "gill filaments"], "article_id"=>1210269, "categories"=>["Biological Sciences"], "users"=>["Taketeru Tomita", "Masaru Nakamura", "Keiichi Sato", "Hiroko Takaoka", "Minoru Toda", "Junro Kawauchi", "Kazuhiro Nakaya"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0109504.g003", "stats"=>{"downloads"=>2, "page_views"=>182, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Length_177_standard_deviation_of_the_external_gill_filaments_on_the_first_gill_slit_for_35_embryos_/1210269", "title"=>"Length (±standard deviation) of the external gill filaments on the first gill slit for 35 embryos.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-10-20 02:55:30"}
  • {"files"=>["https://ndownloader.figshare.com/files/1724777"], "description"=>"<p>Ventral views of the mouth region of 16.7 mm TL (A), 23.2 mm TL (B), 26.0 mm TL (C), 38.4 mm TL (D), 46.9 mm TL (E), and 53.3 mm TL (F) embryos. Scale bars = 0.5 mm in (A) and (B). Scale bars = 1.0 mm in (C), (D), (E), and (F).</p>", "links"=>[], "tags"=>["egg capsule", "Egg Capsule Respiration", "slit opening", "buccal", "embryo", "gill filaments"], "article_id"=>1210314, "categories"=>["Biological Sciences"], "users"=>["Taketeru Tomita", "Masaru Nakamura", "Keiichi Sato", "Hiroko Takaoka", "Minoru Toda", "Junro Kawauchi", "Kazuhiro Nakaya"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0109504.g006", "stats"=>{"downloads"=>0, "page_views"=>1, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Development_of_the_oral_valve_OV_/1210314", "title"=>"Development of the oral valve (OV).", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-10-20 02:55:30"}
  • {"files"=>["https://ndownloader.figshare.com/files/1724734"], "description"=>"<p>A. Schematic diagram of the pharyngeal skeletal and muscular elements of the adult cloudy catshark. B. 3-dimensional reconstructions of pharyngeal skeletal and muscular elements made from histological thin sections. Ventral view of the jaw and pharyngeal skeletal elements (blue) and the hyoid retraction muscle (coracohyoideus; red) in 27.2 mm TL (i), 29.2 mm TL (ii), 32.8 mm TL (iii), and 39.8 mm TL (iv) embryos. Scale bars = 500 µm.</p>", "links"=>[], "tags"=>["egg capsule", "Egg Capsule Respiration", "slit opening", "buccal", "embryo", "gill filaments"], "article_id"=>1210276, "categories"=>["Biological Sciences"], "users"=>["Taketeru Tomita", "Masaru Nakamura", "Keiichi Sato", "Hiroko Takaoka", "Minoru Toda", "Junro Kawauchi", "Kazuhiro Nakaya"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0109504.g004", "stats"=>{"downloads"=>1, "page_views"=>23, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Development_of_pharyngeal_skeletal_and_muscular_elements_in_the_pharyngeal_region_/1210276", "title"=>"Development of pharyngeal skeletal and muscular elements in the pharyngeal region.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-10-20 02:55:30"}

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