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543 results for “larval development”
Figure 2 in Development rates, larval survivorship and wing length of Culex pipiens (Diptera: Culicidae) at constant temperatures
Figure 2. Temperature-dependent rate of development in male (A) and female (B) Culex pipiens from larva I until adult emergence: observed data (open circles) fitted to the Briére model (dotted line) and degree-day model (solid line).
Figure 1 in Development rates, larval survivorship and wing length of Culex pipiens (Diptera: Culicidae) at constant temperatures
Figure 1. Median (Q1–Q3) developmental time (days) of males (M) and females (F) of Culex pipiens at five constant temperatures: (A) from larva I until adult emergence; (B) for larvae IV only. Within each temperature and life stage, medians followed by different letters are significantly different (P <0.05, Mann–Whitney U -test). Numbers of individuals that emerged as male or female are indicated in parentheses.
Figure 3 in Development rates, larval survivorship and wing length of Culex pipiens (Diptera: Culicidae) at constant temperatures
Figure 3. Mean (± SEM) wing length of males (filled squares) and females (open squares) of Culex pipiens reared under constant temperature conditions. Asterisks indicate significant differences between sexes (Student's t-test, P <0.05). For each sex, means with different letters are significantly different (analysis of variance, Tukey's test, P <0.05).
Figure 9 in Five invaginations and shedding of the larval epidermis during development of the hoplonemertean Pantinonemertes californiensis (Nemertea: Hoplonemertea)
Figure 9. Fluorescein diacetate (FDA)-stained late rudiment stage larva of Pantinonemertes californiensis in the act of shedding cells of the larval epidermis. (A) Bright-field view; (B) a confocal projection of 21 1-µm sections of the same larva, showing the brightly- uorescent FDA-labelled cells of the transitory epidermis. Anterior is to the right. The larva was trapped on a slide, fixed by owing formaldehyde in seawater under the coverslip, and the image was collected immediately. Arrows highlight the same shedding cells in both images, which are brightly labelled with FDA.
Figure 8 in Five invaginations and shedding of the larval epidermis during development of the hoplonemertean Pantinonemertes californiensis (Nemertea: Hoplonemertea)
Figure 8. Roll-out epidermal map of phalloidin-labelled early invagination embryo (23.5-hour-old at 15–16◦C) of Pantinonemertes californiensis, showing cell outlines (a total of 80 large cells).
Figure 7 in Five invaginations and shedding of the larval epidermis during development of the hoplonemertean Pantinonemertes californiensis (Nemertea: Hoplonemertea)
Figure 7. Confocal projections of phalloidin-labelled larvae of Pantinonemertes californiensis showing surface cell outlines in the early invagination stage (A), early rudiment stage (B), late rudiment stage, which is contemporary with shedding of the larval epidermis (C), and the vermicular stage (D, E). At 15–16◦C these stages correspond to 23.5 hours (A), 2 days (B), 3 days (C) and 4 days (D, E) of development; ventral view, apical up. (E) An 11.5-µm sub-stack from the same stack as (D) shows the cell outlines without the interference of body wall muscles. (A) Mounted in Vectashield and scanned using 60 × Oil lens (NA 1.4); (B–E) mounted in phosphate-buffered saline and scanned using 60 × water lens (NA 1.2). Apical plate (ap), proboscis (pb), stomodeum (st), anterior invaginations (ai), remnants of posterior invaginations (pi∗), muscles (ms). Asterisks mark several provisional larval epidermis cells.
Figure 5 in Five invaginations and shedding of the larval epidermis during development of the hoplonemertean Pantinonemertes californiensis (Nemertea: Hoplonemertea)
Figure 5. Confocal micrographs of the late rudiment stage larvae of Pantinonemertes californiensis (3-day-old at 15–16◦C) labelled with phalloidin. This is the stage at which the larvae shed larval epidermal cells; apical is up. (A) A 10-µm sub-stack of frontal sections showing well-developed body wall muscles, the bipartite proboscis (pb) equipped with a muscle retractor (prm) and the dorsal commissure of the brain (dc); (B) a 5-µm sub-stack of frontal sections of a different larva showing the ventral commissure of the brain (vc), the lateral nerve cords (lnc) with the associated nerve cord muscles (nm), and proboscis insertion muscles (pim); (C) a 6.5-µm sub-stack of frontal sections of yet another larva showing the fused foregut (fgt) and midgut (mgt), and the proboscis pore (pp).
Figure 6 in Five invaginations and shedding of the larval epidermis during development of the hoplonemertean Pantinonemertes californiensis (Nemertea: Hoplonemertea)
Figure 6. Confocal micrographs of phalloidin-labelled vermicular stage larvae of Pantinonemertes californiensis; anterior is to the left. (A–C) Five-day-old larvae (12–13◦C). (A) An 8-µm sub-stack of frontal sections, showing cerebral ganglia (cg), lateral nerve cords (lnc) and nerve cord muscles (nm); (B) a 1-µm sagittal section, showing the proboscis (pb), foregut (fgt) and stomodeal opening (st). The position of the original proboscis pore (which is no longer apparent) is marked with an asterisk; (C) a 10-µm sub-stack of sagittal sections, illustrating the relative position of the dorsal commissure (dc) and lateral nerve cords with respect to proboscis; (D) confocal Z-projection (ventral view) of a 13-day-old larva, showing the well-developed circular, longitudinal and diagonal muscles of the body wall as well as the small cells that surround the stomodeum.
Figure 4 in Five invaginations and shedding of the larval epidermis during development of the hoplonemertean Pantinonemertes californiensis (Nemertea: Hoplonemertea)
Figure 4. Confocal micrographs of phalloidin-labelled early rudiment stage Pantinonemertes californiensis larvae. (A, C, D) Three-day-old larvae (12–13◦C); (B) 2-day-old larva (15–16◦C); apical pole up, ventral to the left in (A, C, D). (A) Lateral view, showing apical plate (ap) and the two shallow dimples at the anterior end – remnants of one of the anterior invaginations (ai1 and ai2); (B) a 15-µm frontal sub-stack showing the two forks of anterior invaginations (ai1 and ai2), the remnants of posterior invaginations (pi∗), posterior cirrus (pc) and midgut lumen (arrowhead); (C) a single sagittal 1-µm section showing the cerebral ganglia (cg) and lateral nerve cord (lnc); (D) same embryo as in (C), different 1-µm section showing the proboscis (pb), dorsal commissure (dc), and ventral commissure (vc) of the brain.
Figure 3 in Five invaginations and shedding of the larval epidermis during development of the hoplonemertean Pantinonemertes californiensis (Nemertea: Hoplonemertea)
Figure 3. Confocal micrographs of phalloidin-labelled early (A, B) and late (C, D) invagination stage larvae of Pantinonemertes californiensis. (A, B) A 28.5-hour-old prehatched embryo (12–13◦C); (C, D) a 46-hour-old (12–13◦C) larva; apical pole marked by the apical plate (ap) is up or upper right. (A) Confocal Z-projection (ventral view) showing stomodeum (st), proboscis rudiment (pb), paired anterior (ai) and posterior (pi) invaginations; (B) a 30-µm thick sub-stack of frontal sections showing the posterior cirrus (pc), paired anterior and posterior invaginations, proboscis and midgut lumen (arrowhead); (C) confocal Z-projection (ventral view), showing bifurcated anterior and posterior invaginations and the stomodeum (st); (D) a 29-µm thick sub-stack of frontal sections showing the five invaginations and midgut lumen (arrowhead).
Figure 1 in Five invaginations and shedding of the larval epidermis during development of the hoplonemertean Pantinonemertes californiensis (Nemertea: Hoplonemertea)
Figure 1. Cleavage in Pantinonemertes californiensis. (A) Fertilized egg in egg envelopes; (B) first polar body formation; (C) second polar body formation; (D) two-cell stage; (E) four-cell stage; (F) eight-cell stage; (G) 16-cell stage; (H) 32-cell stage. Scale bar 100 µm.
Figure 2 in Five invaginations and shedding of the larval epidermis during development of the hoplonemertean Pantinonemertes californiensis (Nemertea: Hoplonemertea)
Figure 2. Planuliform larva of Pantinonemertes californiensis. (A) Newly-hatched invagination stage larva of P. californiensis is uniformly ciliated, has an apical tuft (ap) and posterior cirrus (pc); (B) late rudiment stage larva (3 days old at 15–16◦C) has a distinct proboscis rudiment (pb) and two ocelli; (C) late rudiment stage larva in the process of shedding ciliated cells of its larval epidermis from around the mouth (m); (D) a chain of ciliated larval epidermal cells shed and left behind by a larva of P. californiensis. Scale bars 50 µm.
Figure 11. Maja squinado Herbst, 1788 in The larval development of Maja squinado and M. brachydactyla (Decapoda, Brachyura, Majidae) described from plankton collected and laboratory-reared material
Figure 11. Maja squinado Herbst, 1788, pleon. (A) first zoea, dorsal view; (B) first zoea, detail of telson; (C) second zoea, dorsal view; (D) first zoea, lateral view; (E) second zoea, lateral view. Scale bar of A and C–E5500 Mm; B5250 Mm.
Figure 9. Maja squinado Herbst, 1788 in The larval development of Maja squinado and M. brachydactyla (Decapoda, Brachyura, Majidae) described from plankton collected and laboratory-reared material
Figure 9. Maja squinado Herbst, 1788, pereiopods. (A) first zoea; (B) second zoea. Scale bar5500 Mm.
Figure 5. Maja squinado Herbst, 1788 in The larval development of Maja squinado and M. brachydactyla (Decapoda, Brachyura, Majidae) described from plankton collected and laboratory-reared material
Figure 5. Maja squinado Herbst, 1788, maxilla. (A) first zoea; (B) second zoea; (C) megalopa. Scale bar5100 Mm.
Figure 4. Maja squinado Herbst, 1788 in The larval development of Maja squinado and M. brachydactyla (Decapoda, Brachyura, Majidae) described from plankton collected and laboratory-reared material
Figure 4. Maja squinado Herbst, 1788, mandibular palp. (A) megalopa, maxillule. (B) first zoea; (C) second zoea; (D) megalopa. Scale bar of A550 Mm; B–D5100 Mm.
Figure 3. Maja squinado Herbst, 1788 in The larval development of Maja squinado and M. brachydactyla (Decapoda, Brachyura, Majidae) described from plankton collected and laboratory-reared material
Figure 3. Maja squinado Herbst, 1788, antennule. (A) first zoea; (B) second zoea; (C) megalopa. Antenna. (D) first zoea; (E) second zoea; (F) megalopa. Scale bars5100 Mm.
Figure 10. Maja squinado Herbst, 1788 in The larval development of Maja squinado and M. brachydactyla (Decapoda, Brachyura, Majidae) described from plankton collected and laboratory-reared material
Figure 10. Maja squinado Herbst, 1788, megalopa. (A) sternum and pereiopods; (B) detail of the dactyl of the pereiopod 3; (C) detail of the dactyl of the pereiopod 5. Scale bar5500 Mm.
Figure 2. Maja squinado Herbst, 1788 in The larval development of Maja squinado and M. brachydactyla (Decapoda, Brachyura, Majidae) described from plankton collected and laboratory-reared material
Figure 2. Maja squinado Herbst, 1788, megalopa. (A) megalopa, dorsal view; (B) megalopa, lateral view. Scale bar51000 Mm.
Figure 8. Maja squinado Herbst, 1788 in The larval development of Maja squinado and M. brachydactyla (Decapoda, Brachyura, Majidae) described from plankton collected and laboratory-reared material
Figure 8. Maja squinado Herbst, 1788, third maxilliped. (A) second zoea; (B) megalopa. Scale bar5250 Mm.
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
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OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.