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543 results for “larval development”
FIGURE 5 in The parasitic barnacle Peltogaster reticulata Shiino, 1943 (Rhizocephala, Peltogastridae) fromRussian watersof the Sea of Japan:morphological description molecular identification and complete larval development
FIGURE 5. Size-frequency distribution of male (black bars) and female (grey bars) cyprids of Peltogaster reticulata.
FIGURE 7. Peltogaster reticulata, nauplius I. A in The parasitic barnacle Peltogaster reticulata Shiino, 1943 (Rhizocephala, Peltogastridae) fromRussian watersof the Sea of Japan:morphological description molecular identification and complete larval development
FIGURE 7. Peltogaster reticulata, nauplius I. A, ventral view; B, dorsal view; C, details of B; D, frontolateral horn; E, appendages. Al, antennule; an, antenna; fh, frontolateral horn; fr, furcal rami; md, mandible; po, pore; se, subterminal seta; su, suture; 2, 2a, head shield setae.
FIGURE 1 in Larval development and osteology of Callanthias platei (Teleostei: Callanthiidae) from Desventuradas Islands, South Pacific
FIGURE 1. Larval development of Callanthias platei, lateral view. A. Preflexion larva, 3 mm SL (MNHNCL ICT 7605). B. Flexion larva, 4.48 mm SL (MNHNCL ICT 7606). C. Postflexion larva, 6.09 mm SL (MNHNCL ICT 7603).
FIGURE 3 in Larval development and osteology of Callanthias platei (Teleostei: Callanthiidae) from Desventuradas Islands, South Pacific
FIGURE 3. Osteological development of vertebral column, dorsal, anal and pelvic fins of Callanthias platei, lateral view. Red/pink structures, bone; blue structures, cartilage. A. 3 mm SL. B. 4.48 mm SL. C. 5.31 mm SL. D. 6.09 mm SL. adr: anal distal radial; apr: anal proximal radial; ap: anal pterygiophore; as: anal spine; asr: anal soft ray; ddr: dorsal distal radial; dmr: dorsal middle radial; dp: dorsal pterygiophore; dpr: dorsal proximal radial; ds: dorsal spine; dsr: dorsal soft ray; ha: haemal arch; hs: haemal spine; na: neural arch ns: neural spine; p: pelvis; pr: pelvic ray; ps: pelvic spine; snc: supraneural cartilages; v: vertebra.
Temperature-mediated tradeoff between development and performance in larval wood frogs (Rana sylvatica)
<p>Countergradient variation has been detected in diverse taxa. In a common manifestation, individuals from colder environments develop faster than conspecifics from warmer environments when placed in a common garden. Where such a pattern exists, it implies a tradeoff: individuals from warmer environments have intrinsic rates of development lower than those demonstrated by other individuals of the same species. We explored a tradeoff between development rate and locomotor performance in the wood frog (Rana sylvatica), an amphibian for which countergradient variation has been well documented. We reared wood frogs from 10 populations under two temperature regimes, bracketing the temperatures observed in local natural ponds. Individuals reared under warmer conditions developed more rapidly but exhibited burst speeds 20% lower than individuals reared under colder conditions. The shape of the relationship was consistent across the 10 populations and thus, we found no evidence of countergradient variation in performance. Burst speed assays of wild-caught tadpoles from the same populations showed a similar but nonsignificant trend, with greater variability among ponds. Overall, our findings support the existence of a tradeoff that may be of broad importance and which may help explain widespread occurrence of countergradient variation.</p>
Data from: Brain plasticity over the metamorphic boundary: carry-over effect of larval environment on froglet brain development
Brain development shows high plasticity in response to environmental heterogeneity. However, it is unknown how environmental variation during development may affect brain architecture across life history switch points in species with complex life cycles. Previously, we showed that predation and competition affect brain development in common frog (Rana temporaria) tadpoles. Here, we studied if larval environment had carry-over effects in brains of metamorphs. Tadpoles grown at high density had large optic tecta at metamorphosis, while tadpoles grown under predation risk had small diencephala. We found that larval density had a carry-over effect on froglet optic tectum size, while the effect of larval predation risk had vanished by metamorphosis. We discuss the possibility that the observed changes may be adaptive, reflecting the needs of an organism in given environmental and developmental contexts.
Data from: Temperature and sex related effects of serine protease alleles on larval development in the Glanville fritillary butterfly
The body reserves of adult Lepidoptera are accumulated during larval development. In the Glanville fritillary butterfly, larger body size increases female fecundity, but in males fast larval development and early eclosion, rather than large body size, increase mating success and hence fitness. Larval growth rate is highly heritable, but genetic variation associated with larval development is largely unknown. By comparing the Glanville fritillary population living in the Åland Islands in northern Europe with a population in Nantaizi in China, within the source of the post-glacial range expansion, we identified candidate genes with reduced variation in Åland, potentially affected by selection under cooler climatic conditions than in Nantaizi. We conducted an association study of larval growth traits by genotyping the extremes of phenotypic trait distributions for 23 SNPs in 10 genes. Three genes in clip-domain serine protease family were associated with larval growth rate, development time and pupal weight. Additive effects of two SNPs in the prophenoloxidase-activating proteinase-3 (ProPO3) gene, related to melanization, showed elevated growth rate in high temperature but reduced growth rate in moderate temperature. The allelic effects of the vitellin-degrading protease precursor gene on development time were opposite in the two sexes, one genotype being associated with long development time and heavy larvae in females but short development time in males. Sexually antagonistic selection is here evident in spite of sexual size dimorphism.
Data from: Bacterial community dynamics during embryonic and larval development of three confamilial echinoids
Development of some animals is influenced by and, in some cases, dependent on the associated microbiota. The timing of when associated bacterial communities are established during the development of marine invertebrates and their subsequent dynamics across stages are known for only a few species. Here, we compared the bacterial communities of 3 confamilial echinoids from egg to juvenile using sequence-based approaches. Bacterial communities are established on unfertilized eggs and change gradually during embryonic and larval development. Despite the differences amongst these pre-metamorphic stages, approximately 30% of operational taxonomic units (OTUs) identified in association with unfertilized eggs were present in the juveniles. During embryonic development, host-associated communities diverged from the environmental microbiota but later converged following the onset of larval feeding. Taken together, the data presented here support the hypothesis that bacterial communities are established prior to fertilization and community composition shifts gradually thereafter, all the while remaining distinct from the environment. Future work will need to determine the relative influence of the host and bacteria–bacteria interactions in shaping the associated bacterial community to more broadly determine the potential functional importance of bacteria during the development of larval sea urchins and benthic marine invertebrates.
FIGURE 1 in Larval development in the lutjanid subfamily Lutjaninae (Pisces): the Indo-Pacific genus Pinjalo
FIGURE 1. Head of 56 mm juvenile Pinjalo pinjalo (USNM 56281, based on photos provided by Jeffrey Williams, USNM) showing head shape, eye location and mouth size and orientation. Scale bar = 5 mm. This is the smallest known post-settlement individual of either Pinjalo species.
FIGURES 17–20 in Larval morphology, development, and notes on the natural history of Cephaloleia " rolled-leaf " beetles (Coleoptera: Chrysomelidae: Cassidinae)
FIGURES 17–20. Diet breadth and mean ± SD number of adult beetles per plant. 17. Cephaloleia belti. 18. C. dilaticollis. 19. C. dorsalis. 20. C. placida. Ct: Canna tuerckheimii Kraenzl, C1: Calathea cleistantha Standl., C2: C. crotalifera S. Watson, C3: C. gymnocarpa H. Kenn., C4: C. hammeli H. Kenn., C5: C. inocephala inocephala (Kuntze) H. Kenn. and Nicolson, C6: C. lasiostachia Donn. Sm., C7: C. leucostachys Hook. f., C8: C. lutea Schult., C9: C. marantifolia Standl., C10: C. micans (L. Mathieu) Körn., C11: C. similis H. Kenn., C12: C. warscewiczii (L. Mathieu ex Planch.) Planch. & Linden, I1: Ischnosiphon elegans Standl., I2: I. inflatus Standl., P1: Pleiostachia pruinosa (Regel) K. Schum., Co1: Costus bracteatus Rowlee, Co2: C. laevis Ruiz & Pav., Co3: C. malortieanus H. Wendl., Co4: C. pulverulentus C. Presl, H1: Heliconia imbricata (Kuntze) Baker, H2: H. irrasa Lane ex R.R. Sm., H3: H. latispatha Benth., H4: H. mariae Hook. f., H5: H. mathiasiae G.S. Daniels & F.G. Stiles, H6: H. pogonantha Cufod., H7: H. wagneriana Petersen, R1: Renealmia alpinia (Rottb.) Maas, R2: R. cernua (Sw. ex Roem. & Schult.) J.F. Macbr., R3: R. pluriplicata Maas.
FIGURES 1–16 in Larval morphology, development, and notes on the natural history of Cephaloleia " rolled-leaf " beetles (Coleoptera: Chrysomelidae: Cassidinae)
FIGURES 1–16. Eggs, larva, pupae and adults of four species of "rolled-leaf" beetles. 1–4. Cephaloleia belti. 5–8. C. dilaticollis. 9–12. C. dorsalis. 13–16. C. placida. Scale bars in all panels equal 2 mm.
FIGURES 21–24 in Larval morphology, development, and notes on the natural history of Cephaloleia " rolled-leaf " beetles (Coleoptera: Chrysomelidae: Cassidinae)
FIGURES 21–24. Larva of Cephaloleia belti. 21. Dorsum longitudinal medial setose ridge. 22. Spiracle. 23. Head. 24. Leg.
FIGURE 1 in Morphology of the complete larval development of the symbiotic crab Sestrostoma balssi (Shen, 1932) (Varunidae: Gaeticinae)
FIGURE 1. Sestrostoma balssi (Glassell, 1933), first zoea. A, complete larva, lateral view; B, same, dorsal view; C, antennule; D, antenna; E, mandibles; F, maxillule; G, maxilla; H, first maxilliped; I, second maxilliped; J, pleon, dorsal view.
FIGURE 8 in Morphology of the complete larval development of the symbiotic crab Sestrostoma balssi (Shen, 1932) (Varunidae: Gaeticinae)
FIGURE 8. Sestrostoma balssi (Glassell, 1933), megalopa. A–E, pereiopods 1–5; F, sternum; G, pleon with pleopods, lateral view; H, pleon, dorsal view; I, pleopod 1; J, uropod.
FIGURE 7 in Morphology of the complete larval development of the symbiotic crab Sestrostoma balssi (Shen, 1932) (Varunidae: Gaeticinae)
FIGURE 7. Sestrostoma balssi (Glassell, 1933), megalopa. A, first maxilliped; B, second maxilliped; C, third maxilliped (setules on plumodenticulate setae omitted).
FIGURE 4 in Morphology of the complete larval development of the symbiotic crab Sestrostoma balssi (Shen, 1932) (Varunidae: Gaeticinae)
FIGURE 4. Sestrostoma balssi (Glassell, 1933), fourth zoea. A, complete larva, lateral view; B, antennule; C, antenna; D, mandibles; E, maxillule; F, maxilla; G, first maxilliped; H, second maxilliped; I, third maxilliped; J, pereiopods; K, pleon, ventral view.
FIGURE 6 in Morphology of the complete larval development of the symbiotic crab Sestrostoma balssi (Shen, 1932) (Varunidae: Gaeticinae)
FIGURE 6. Sestrostoma balssi (Glassell, 1933), megalopa. A, complete larva, dorsal view; B, antennule; C, antenna; D, mandibles; E, maxillule; F, maxilla (arrows indicate tubercles; setules on scaphognathite omitted).
FIGURE 5 in Morphology of the complete larval development of the symbiotic crab Sestrostoma balssi (Shen, 1932) (Varunidae: Gaeticinae)
FIGURE 5. Sestrostoma balssi (Glassell, 1933), fifth zoea. A, complete larva, lateral view; B, antennule; C, antenna; D, mandibles; E, maxillule; F, maxilla; G, first maxilliped; H, second maxilliped; I, third maxilliped; J, pereiopods; K, pleon, ventral view.
FIGURE 3 in Morphology of the complete larval development of the symbiotic crab Sestrostoma balssi (Shen, 1932) (Varunidae: Gaeticinae)
FIGURE 3. Sestrostoma balssi (Glassell, 1933), third zoea. A, complete larva, lateral view; B, antennule; C, antenna; D, mandibles; E, maxillule; F, maxilla; G, first maxilliped; H, second maxilliped; I, pleon, dorsal view.
FIGURE 2 in Morphology of the complete larval development of the symbiotic crab Sestrostoma balssi (Shen, 1932) (Varunidae: Gaeticinae)
FIGURE 2. Sestrostoma balssi (Glassell, 1933), second zoea. A, complete larva, lateral view; B, antennule; C, antenna; D, mandibles; E, maxillule; F, maxilla; G, first maxilliped; H, second maxilliped; I, pleon, dorsal view.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
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.