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213 results for “fish scales”
Cortisol in fish scales remains stable during extended periods of storage.
<p>Dataset to accompany the manuscript: <a href="https://doi.org/10.1093/conphys/coae065">https://doi.org/10.1093/conphys/coae065</a></p> <p>The dataset contains two data files describing cortisol concentrations in the scales of adult salmon and a "Read Me" file that explains the data structure and source. </p>
A multi-scaled approach to evaluating the fish community structure within southern Appalachian streams, 2011
There is considerable uncertainty regarding the relative roles of stream habitat, landscape characteristics, and interspecific interactions in structuring stream fish assemblages. Thus, I evaluated the relative importance of environmental characteristics and species interactions, at local and landscape scales, on fish occupancy within the upper Little Tennessee River basin, Georgia, and North Carolina. Using a quadrat sample design, fishes were collected at 525 channel units among 48 study reaches during two consecutive years. I evaluated the relative support for the influence of local- and landscape-scale factors on fish occupancy using multi-scaled,hierarchical, multi-species occupancy models.
Data for: Land use change and coastal water darkening drive synchronous dynamics in phytoplankton and fish phenology on centennial time scales
<p>At high latitudes, the suitable window for timing reproductive events is particularly narrow, promoting tight synchrony between trophic levels. Climate change may disrupt this synchrony due to diverging responses to temperature between e.g. the early life stages of higher trophic levels and their food resources. Evidence for this is equivocal, and the role of compensatory mechanisms are poorly understood. Here, we show how a combination of ocean warming and coastal water darkening drive long-term changes in phytoplankton spring bloom timing in Lofoten Norway, and how spawning time of Northeast Arctic cod responds in synchrony. Spring bloom timing was derived from hydrographical observations dating back to 1936, while cod spawning time was estimated from weekly fisheries catch and roe landing data since 1877. Our results suggest that land use change causing coastal water darkening has gradually delayed the spring bloom up to 1990 after which ocean warming has caused it to advance. The cod appear to track phytoplankton dynamics by timing gonadal development and spawning to maximize overlap between offspring hatch date and predicted resource availability. This finding emphasises the importance of land-ocean coupling for coastal ecosystem functioning, and the potential for fish to adapt through phenotypic plasticity.</p>
Fig. 1 in Lepisosteiform Fish (Holostei) Ganoid Scales From The Middle Jurassic Deposits Of Ukraine
Fig. 1. Location of the Pekari fossil site on the map of Ukraine, the portrait of Professor O. S. Rogovich with the original (above) and additional labels (below) of the described material.
Fig. 2 in Lepisosteiform Fish (Holostei) Ganoid Scales From The Middle Jurassic Deposits Of Ukraine
Fig. 2. Ganoid scales of Lepisosteiformes gen. et sp. indet. from Pekari: A1-A2 — No. 391/109; B1-B2 — No. 391/107a; C1-C2 — No. 391/107b; D1-D2 — No. 391/110; E1-E2 — No. 391/108; F1-F2 — No. 391/107d; G1- G2 — No. 391/107c. Outer view in A1, B1, C1, D1, E1, F1, G1, inner view in A2, B2, C2, D2, E2, F2, G2. Abbreviations: bp, basal plate; dap, dorsal anterior process; dp, dorsal peg; gl, ganoin layer; gr, ganoin ridges.
Figure 14 in Scale morphology and specialized dorsal scales of a new teleosteomorph fish from the Aptian of West Gondwana
Figure 14. (a) SEM photograph of flank scale of Teleosteomorpha n. sp. 1 (sample "T-5.5"). (b) SEM photograph of flank scale of Teleosteomorpha n. sp. 1 (MIC-V706).
Figure 13 in Scale morphology and specialized dorsal scales of a new teleosteomorph fish from the Aptian of West Gondwana
Figure 13. Scutes of Teleosteomorpha n. sp. 1. (a) Ventral scute preceding caudal fin in specimen MIC-V662. (b) Camera lucida drawing of scute in detail. (c) Pre-anal scutes in specimen MIC-V519a; ant, anteriad; pas, preanal scutes; ves, ventral caudal scute.
Figure 10 in Scale morphology and specialized dorsal scales of a new teleosteomorph fish from the Aptian of West Gondwana
Figure 10. Postcranial region of Teleosteomorpha n. sp. 1 (MIC-V701a). Detail in photograph and drawing of uppermost scale row in lateral view. It shows the second row also, as well as the first row scale from the left side of the specimen; ant, anteriad.
Figure 12 in Scale morphology and specialized dorsal scales of a new teleosteomorph fish from the Aptian of West Gondwana
Figure 12. Picture and camera lucida drawing of caudal fin squamation of Teleosteomorpha n. sp. 1 (MIC V523). Dorsal lobe shows the base of the first principal ray covered by scales. Note the dorsal scute preceding caudal fin; ant, anteriad; des, dorsal caudal scute; llls, last lateral line scale; 1st cr, first caudal ray; 1st r s, first ray scales; 1st pms, first posterior margin scale.
Figure 11 in Scale morphology and specialized dorsal scales of a new teleosteomorph fish from the Aptian of West Gondwana
Figure 11. Scales of Teleosteomorpha n. sp. 1. (a) Specimen MIC-V46a. (b) Detail of camera lucida drawing of scales carrying the main lateral line; ant, anteriad; asll, branch from lateral line with opening at surface; ll, main lateral line with opening at posterior margin; lls, lateral line scales.
Figure 9 in Scale morphology and specialized dorsal scales of a new teleosteomorph fish from the Aptian of West Gondwana
Figure 9. (a) Postcranial region of Teleosteomorpha n. sp. 1 (MIC-V660); white rectangle marks detail in (b). (b) Picture and camera lucida drawing showing the particular pattern of missing median dorsal row, but a series of scales on each side of dorsal margin; ant, anteriad; ls, left side scales; rs, right side scales.
Figure 15 in Scale morphology and specialized dorsal scales of a new teleosteomorph fish from the Aptian of West Gondwana
Figure 15. Histological slides of Teleosteomorpha n. sp. 1 (specimen MIC-V523) observed under petrographic microscope. (a) Lepisosteoidscale type. (b) Multiple ganoine layers under normal light. (c) Multiple ganoine layers under polarized light. (d) Ganoine and basal bony plate with all the lepisosteoid features; bbp, basal bony plate; c.W, canaliculi of Williamson; gl, ganoine layers; lb, laminar bone; llc, lateral line canal; o, lacunae (osteocyte spaces); sv.c, vascular canal; S.f, Sharpey's fiber.
Figure 8 in Scale morphology and specialized dorsal scales of a new teleosteomorph fish from the Aptian of West Gondwana
Figure 8. (a) Flank of Teleosteomorpha n. sp. 1 (MIC-V662). (b) Detail of the uppermost dorsal scale row in the pre-anal region; ant, anteriad.
Figure 7 in Scale morphology and specialized dorsal scales of a new teleosteomorph fish from the Aptian of West Gondwana
Figure 7. Squamation of the flank of Teleosteomorpha n. sp. 1 from the La Cantera Formation. (a) Pre-anal scale patch in MIC-V635. (b) Scales from caudal peduncle of MIC-V523. Note that the lateral line passes through them; asll, additional pore of lateral line or pitline; ll, main lateral line; ant, anteriad.
Figure 6. Teleosteomorpha n in Scale morphology and specialized dorsal scales of a new teleosteomorph fish from the Aptian of West Gondwana
Figure 6. Teleosteomorpha n. sp. 1. Rounded ventral pre-anal scales in specimen MIC-V621b. Note the growth lines; ant, anteriad.
Figure 5 in Scale morphology and specialized dorsal scales of a new teleosteomorph fish from the Aptian of West Gondwana
Figure 5. Inner view of middle flank scales of Teleosteomorpha n. sp. 1, showing main elements of peg-and-socket articulation, the keel, the groove, and the peg. (a) Picture and camera lucida drawing of some scales of specimen MIC-V523. (b) SEM photograph of one of the scales of sample MIC-V706a; ant, anteriad.
Figure 2. Teleosteomorpha n in Scale morphology and specialized dorsal scales of a new teleosteomorph fish from the Aptian of West Gondwana
Figure 2. Teleosteomorpha n. sp. 1. (a) MIC-V701a one of the most complete specimens from the La Cantera Formation. (b) Specimen MIC-V703a, showing body completely covered by ganoid scales.
Figure 1 in Scale morphology and specialized dorsal scales of a new teleosteomorph fish from the Aptian of West Gondwana
Figure 1. (a) Geographic provenance of specimens from the La Cantera Formation, San Luis, Argentina. Star indicates the type locality. (b) Stratigraphic section in the type locality. (c) Interpretative stratigraphic sequence of La Cantera Formation at the type locality. Courtesy of Gabriela Castillo-Elías.
Figure 3 in Scale morphology and specialized dorsal scales of a new teleosteomorph fish from the Aptian of West Gondwana
Figure 3. Sample of pre-anal ganoid scales with well-developed peg-and-socket articulation of Teleosteomorpha n. sp. 1. (a) MIC-V634, an isolated mid-flank scale, which carries the lateral line. (b) A ventral flank scale of specimen MIC-V631, showing a serrated posteroventral margin. (c) Specimen MIC-V706b, inner surface of another ventral flank scale, with serrated posteroventral margin and the typical keel and groove for peg-and-socket articulation. (d) SEM photograph (×50) of specimen MIC-V706a; ant, anteriad.
Figure 4 in Scale morphology and specialized dorsal scales of a new teleosteomorph fish from the Aptian of West Gondwana
Figure 4. Post-anal rhombic scales of Teleosteomorpha n. sp. 1. from the La Cantera Formation. (a) MIC-V699, an isolated scale. (b) Sample MIC-V706b, showing concentric pattern of growth lines in external view. (c) Other sample of MIC-V706b under SEM; growth lines on external surface.
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Allen Brain Atlas
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