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Diffractive Properties of Blue Morpho Butterfly Wings
Diffractive Properties of Blue Morpho Butterfly Wings Mary Lalak and Paul Brackman Department of Physics and Astronomy, University of Georgia, Athens, Georgia 30602 (Dated: October 24, 2014) Many species of butterflies are known to produce beautiful iridescent colors when exposed to light from different angles. These affects can be attributed to a few different optical phenomena combined, the most prominent being reflective diffraction. Using common household items and with a budget of 50 dollars, we attempt to confirm the theory that the collection of ridges on the individual scales on the wing act as transmission gratings, as well as reflective. These results are quantified by the calculation of the ridge separation and comparing this distance to those observed by a scanning electron microscope photo. I. INTRODUCTION In studying the optical property of iridescence, three distinct mechanisms must be discussed. Thin film inter- ference, structured coloring, and reflective diffraction all contribute to the iridescent qualities of a surface. Thin film interference occurs when light strikes a film, some of it enters the film, and the rest is reflected off. The light transmitted through reflects off the bottom of the film and exits the film to interfere with the light that FIG. 1: Up-Close View of Scales from an Optical Microscope originally reflected off the surface of the film. This inter- ference pattern causes a spectrum of color to be visible from white light. Examples of thin film interference in- clude oil slicks and soap bubbles. Structural coloring oc- curs when the structure of the object itself (with various reflective surfaces) produces an interference resulting in vibrant colors. -
Belonidae Bonaparte 1832 Needlefishes
ISSN 1545-150X California Academy of Sciences A N N O T A T E D C H E C K L I S T S O F F I S H E S Number 16 September 2003 Family Belonidae Bonaparte 1832 needlefishes By Bruce B. Collette National Marine Fisheries Service Systematics Laboratory National Museum of Natural History, Washington, DC 20560–0153, U.S.A. email: [email protected] Needlefishes are a relatively small family of beloniform fishes (Rosen and Parenti 1981 [ref. 5538], Collette et al. 1984 [ref. 11422]) that differ from other members of the order in having both the upper and the lower jaws extended into long beaks filled with sharp teeth (except in the neotenic Belonion), the third pair of upper pharyngeal bones separate, scales on the body relatively small, and no finlets following the dorsal and anal fins. The nostrils lie in a pit anterior to the eyes. There are no spines in the fins. The dorsal fin, with 11–43 rays, and anal fin, with 12–39 rays, are posterior in position; the pelvic fins, with 6 soft rays, are located in an abdominal position; and the pectoral fins are short, with 5–15 rays. The lateral line runs down from the pectoral fin origin and then along the ventral margin of the body. The scales are small, cycloid, and easily detached. Precaudal vertebrae number 33–65, caudal vertebrae 19–41, and total verte- brae 52–97. Some freshwater needlefishes reach only 6 or 7 cm (2.5 or 2.75 in) in total length while some marine species may attain 2 m (6.5 ft). -
Descriptions of Larvae of California
SUMIDA ET AL.: CALIFORNIA YELLOWTAIL AND OTHER CARANGID LARVAE CalCOFI Rep., Vol. XXVI, 1985 DESCRIPTIONS OF LARVAE OF CALIFORNIA YELLOWTAIL, SERlOLA LALANDI, AND THREE OTHER CARANGIDS FROM THE EASTERN TROPICAL PACIFIC: CHLOROSCOMBRUS ORQUETA, CARANX CABALLUS, AND CARANX SEXFASClATUS BARBARA Y. SUMIDA, ti. GEOFFREY MOSER. AND ELBERT H. AHLSTROM National Marine Fisheries Service Southwest Fisheries Center P.O. Box 271 La Jolla. California 92038 ABSTRACT southern California and Baja California, and it briefly Larvae are described for four species of jacks, fami- supported a commercial fishery during the 1950s ly Carangidae. Three of these, Seriola lalandi (Cali- (MacCall et al. 1976). Larvae of Seriola species from fornia yellowtail), Chloroscombrus orqueta, and other regions of the world have been described (see Carum caballus, occur in the CalCOFI region. A literature review in Laroche et al. 1984), but larvae of fourth species, Caranx sexfasciatus, occurs from eastern Pacific Seriola lalandi have not previously Mazatlan, Mexico, to Panama. Species are distin- been described’. This paper also describes larvae of guished by a combination of morphological, pigmen- two other carangids, Chloroscombrus orqueta and tary, and meristic characters. Larval body morphs Caranx caballus, occurring in the CalCOFI region, range from slender S. lalandi, with a relatively elon- and a third carangid, Caranx sexfasciatus, which gate gut, to deep-bodied C. sexfasciatus, with a occurs to the south. triangular gut mass. Pigmentation patterns are charac- teristic for early stages of each species, but all except MATERIALS AND METHODS C. orqueta become heavily pigmented in late stages of Larvae used in this work were obtained from var- development. -
Iridescence in Cooked Venison – an Optical Phenomenon
Journal of Nutritional Health & Food Engineering Research Article Open Access Iridescence in cooked venison – an optical phenomenon Abstract Volume 8 Issue 2 - 2018 Iridescence in single myofibers from roast venison resembled multilayer interference in having multiple spectral peaks that were easily visible under water. The relationship HJ Swatland of iridescence to light scattering in roast venison was explored using the weighted- University of Guelph, Canada ordinate method of colorimetry. In iridescent myofibers, a reflectance ratio (400/700 nm) showing wavelength-dependent light scattering was correlated with HJ Swatland, Designation Professor CIE (Commission International de l’Éclairage) Y%, a measure of overall paleness Correspondence: Emeritus, University of Guelph, 33 Robinson Ave, Guelph, (r=0.48, P< 0.01). Hence, meat iridescence is an optical phenomenon. The underlying Ontario N1H 2Y8, Canada, Tel 519-821-7513, mechanism, subsurface multilayer interference, may be important for meat colorimetry. Email [email protected] venison, iridescence, interference, reflectance, meat color Keywords: Received: August 23, 2017 | Published: March 14, 2018 Introduction balanced pixel hues that have tricked your eyes to appear white; and when we perceive interference colors, complex interference spectra Iridescence is an enigmatic aspect of meat color with some practical trick our eyes again. As the order of interference increases, the colors 1–4 importance for consumers concerned about green colors in meat. appear to change from metallic -
BIO 313 ANIMAL ECOLOGY Corrected
NATIONAL OPEN UNIVERSITY OF NIGERIA SCHOOL OF SCIENCE AND TECHNOLOGY COURSE CODE: BIO 314 COURSE TITLE: ANIMAL ECOLOGY 1 BIO 314: ANIMAL ECOLOGY Team Writers: Dr O.A. Olajuyigbe Department of Biology Adeyemi Colledge of Education, P.M.B. 520, Ondo, Ondo State Nigeria. Miss F.C. Olakolu Nigerian Institute for Oceanography and Marine Research, No 3 Wilmot Point Road, Bar-beach Bus-stop, Victoria Island, Lagos, Nigeria. Mrs H.O. Omogoriola Nigerian Institute for Oceanography and Marine Research, No 3 Wilmot Point Road, Bar-beach Bus-stop, Victoria Island, Lagos, Nigeria. EDITOR: Mrs Ajetomobi School of Agricultural Sciences Lagos State Polytechnic Ikorodu, Lagos 2 BIO 313 COURSE GUIDE Introduction Animal Ecology (313) is a first semester course. It is a two credit unit elective course which all students offering Bachelor of Science (BSc) in Biology can take. Animal ecology is an important area of study for scientists. It is the study of animals and how they related to each other as well as their environment. It can also be defined as the scientific study of interactions that determine the distribution and abundance of organisms. Since this is a course in animal ecology, we will focus on animals, which we will define fairly generally as organisms that can move around during some stages of their life and that must feed on other organisms or their products. There are various forms of animal ecology. This includes: • Behavioral ecology, the study of the behavior of the animals with relation to their environment and others • Population ecology, the study of the effects on the population of these animals • Marine ecology is the scientific study of marine-life habitat, populations, and interactions among organisms and the surrounding environment including their abiotic (non-living physical and chemical factors that affect the ability of organisms to survive and reproduce) and biotic factors (living things or the materials that directly or indirectly affect an organism in its environment). -
Marine Science Virtual Lesson Biological Oceanography Photo Credit: Getty Images
Marine Science Virtual Lesson Biological Oceanography Photo credit: Getty Images • The study of how plants and animals interact with What is each other and their marine environment. • How organisms affect and are affected by chemical, Biological physical, and geological oceanography Oceanography? • Studies life in the ocean from tiny algae to giant blue whales Marine Environment Photo credit: Getty Images Biological Pump Some CO2 is • Carbon sink is part of the released through biological pump respiration • The pump includes upwelling that brings nutrient back up the water column • Releasing some CO2 through respiration Upwelling of nutrients Photosynthesis • Sunlight and CO2 is used to make sugar and oxygen • Can be used as fuel for an organism's movement and biological processes • Such as: circulatory system, digestive system, and respiration Where Can You Find Life in the Ocean • Plants and algae are found in the euphotic zone of the ocean • Where light reaches • Animals are found at all depths of the ocean • Most live-in the euphotic zone where there is more prey • 90% of species live and rely in euphotic zones • the littoral (close to shore) and sublittoral (coastal areas) zones Photo credit: libretexts.org Photo credit: Christian Sardet/CNRS/Tara Expéditions Plankton • Drifting animals • Follow the ocean currents (don’t swim) • Holoplankton • Spend entire lives in water column • Meroplankton • Temporary residents of plankton community • Larvae of benthic organisms Plankton 2.0 • Phytoplankton • Autotrophic (photosynthetic) Photo -
(Paralichthys Lethostigma) in the Galveston Bay Estuary, TX
DISTRIBUTION, CONDITION, AND GROWTH OF NEWLY SETTLED SOUTHERN FLOUNDER (Paralichthys lethostigma) IN THE GALVESTON BAY ESTUARY, TX A Thesis by LINDSAY ANN GLASS Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE May 2006 Major Subject: Wildlife and Fisheries Sciences DISTRIBUTION, CONDITION, AND GROWTH OF NEWLY SETTLED SOUTHERN FLOUNDER (Paralichthys lethostigma) IN THE GALVESTON BAY ESTUARY, TX A Thesis by LINDSAY ANN GLASS Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE Approved by: Chair of Committee, Jay R. Rooker Committee Members, William H. Neill Antonietta Quigg Head of Department, Delbert M.Gatlin III May 2006 Major Subject: Wildlife and Fisheries Sciences iii ABSTRACT Distribution, Condition, and Growth of Newly Settled Southern Flounder (Paralichthys lethostigma) in the Galveston Bay Estuary, TX. (May 2006) Lindsay Ann Glass, B.S., Texas A&M University-Galveston Chair of Advisory Committee: Dr. Jay R. Rooker Several flatfish species including southern flounder (Paralichthys lethostigma) recruit to estuaries during early life. Therefore, the evaluation of estuarine sites and habitats that serve as nurseries is critical to conservation and management efforts. I used biochemical condition and growth measurements in conjunction with catch-density data to evaluate settlement sites used by southern flounder in the Galveston Bay Estuary (GBE). In 2005, beam-trawl collections were made in three major sections of the GBE (East Bay, West Bay, Galveston Bay), and three sites were sampled in each bay. -
Octopus Consciousness: the Role of Perceptual Richness
Review Octopus Consciousness: The Role of Perceptual Richness Jennifer Mather Department of Psychology, University of Lethbridge, Lethbridge, AB T1K 3M4, Canada; [email protected] Abstract: It is always difficult to even advance possible dimensions of consciousness, but Birch et al., 2020 have suggested four possible dimensions and this review discusses the first, perceptual richness, with relation to octopuses. They advance acuity, bandwidth, and categorization power as possible components. It is first necessary to realize that sensory richness does not automatically lead to perceptual richness and this capacity may not be accessed by consciousness. Octopuses do not discriminate light wavelength frequency (color) but rather its plane of polarization, a dimension that we do not understand. Their eyes are laterally placed on the head, leading to monocular vision and head movements that give a sequential rather than simultaneous view of items, possibly consciously planned. Details of control of the rich sensorimotor system of the arms, with 3/5 of the neurons of the nervous system, may normally not be accessed to the brain and thus to consciousness. The chromatophore-based skin appearance system is likely open loop, and not available to the octopus’ vision. Conversely, in a laboratory situation that is not ecologically valid for the octopus, learning about shapes and extents of visual figures was extensive and flexible, likely consciously planned. Similarly, octopuses’ local place in and navigation around space can be guided by light polarization plane and visual landmark location and is learned and monitored. The complex array of chemical cues delivered by water and on surfaces does not fit neatly into the components above and has barely been tested but might easily be described as perceptually rich. -
Species Anchoa Analis (Miller, 1945)
FAMILY Engraulidae Gill, 1861 - anchovies [=Engraulinae, Stolephoriformes, Coilianini, Anchoviinae, Setipinninae, Cetengraulidi] GENUS Amazonsprattus Roberts, 1984 - pygmy anchovies Species Amazonsprattus scintilla Roberts, 1984 - Rio Negro pygmy anchovy GENUS Anchoa Jordan & Evermann, 1927 - anchovies [=Anchovietta] Species Anchoa analis (Miller, 1945) - longfin Pacific anchovy Species Anchoa argentivittata (Regan, 1904) - silverstripe anchovy, Regan's anchovy [=arenicola] Species Anchoa belizensis (Thomerson & Greenfield, 1975) - Belize anchovy Species Anchoa cayorum (Fowler, 1906) - Key anchovy Species Anchoa chamensis Hildebrand, 1943 - Chame Point anchovy Species Anchoa choerostoma (Goode, 1874) - Bermuda anchovy Species Anchoa colonensis Hildebrand, 1943 - narrow-striped anchovy Species Anchoa compressa (Girard, 1858) - deepbody anchovy Species Anchoa cubana (Poey, 1868) - Cuban anchovy [=astilbe] Species Anchoa curta (Jordan & Gilbert, 1882) - short anchovy Species Anchoa delicatissima (Girard, 1854) - slough anchovy Species Anchoa eigenmannia (Meek & Hildebrand, 1923) - Eigenmann's anchovy Species Anchoa exigua (Jordan & Gilbert, 1882) - slender anchovy [=tropica] Species Anchoa filifera (Fowler, 1915) - longfinger anchovy [=howelli, longipinna] Species Anchoa helleri (Hubbs, 1921) - Heller's anchovy Species Anchoa hepsetus (Linnaeus, 1758) - broad-striped anchovy [=brownii, epsetus, ginsburgi, perthecatus] Species Anchoa ischana (Jordan & Gilbert, 1882) - slender anchovy Species Anchoa januaria (Steindachner, 1879) - Rio anchovy -
For Summer Flounder Is Defined As
FISHERY MANAGEMENT PLAN FOR THE SUMMER FLOUNDER FISHERY October 1987 Mid-Atlantic Fishery Management Council in cooperation with the National Marine Fisheries Service, the New England Fishery Management Council, and the South Atlantic Fishery Management Council Draft adopted by MAFMC: 29 October 1987 Final adopted by MAFMC: 16 April1988 Final approved by NOAA: 19 September 1988 3.14.89 FISHERY MANAGEMENT PLAN FOR THE SUMMER FLOUNDER FISHERY October 1987 Mid-Atlantic Fishery Management Council in cooperation with the National Marine Fisheries Service, the New England Fishery Management Council, and the South Atlantic Fishery Management Council See page 2 for a discussion of Amendment 1 to the FMP. Draft adopted by MAFMC: 21 October 1187 final adopted by MAFMC: 16 April1988 final approved by NOAA: 19 September 1988 1 2.27 91 THIS DOCUMENT IS THE SUMMER FLOUNDER FISHERY MANAGEMENT PLAN AS ADOPTED BY THE COUNCIL AND APPROVED BY THE NATIONAL MARINE FISHERIES SERVICE. THE REGULATIONS IN APPENDIX 6 (BLUE PAPER) ARE THE REGULATIONS CONTROLLING THE FISHERY AS OF THE DATE OF THIS PRINTING (27 FEBRUARY 1991). READERS SHOULD BE AWARE THAT THE COUNCIL ADOPTED AMENDMENT 1 TO THE FMP ON 31 OCTOBER 1990 TO DEFINE OVERFISHING AS REQUIRED BY 50 CFR 602 AND TO IMPOSE A 5.5" (DIAMOND MESH) AND 6" (SQUARE MESH) MINIMUM NET MESH IN THE TRAWL FISHERY. ON 15 FEBRUARY 1991 NMFS APPROVED THE OVERFISHING DEFINITION AND DISAPPROVED THE MINIMUM NET MESH. OVERFISHING FOR SUMMER FLOUNDER IS DEFINED AS FISHING IN EXCESS OF THE FMAX LEVEL. THIS ACTION DID NOT CHANGE THE REGULATIONS DISCUSSED ABOVE. 2 27.91 2 2. -
*For More Information, Please See
Common Name Scientific Name Health Point Specifies-Specific Course(s)* Bat, Frog-eating Trachops cirrhosus AN0023 3198 3928 Bat, Fruit - Jamaican Artibeus jamaicensis AN0023 3198 3928 Bat, Mexican Free-tailed Tadarida brasiliensis mexicana AN0023 3198 3928 Bat, Round-eared - stripe-headed Tonatia saurophila AN0023 3198 3928 Bat, Round-eared - white-throated Lophostoma silvicolum AN0023 3198 3928 Bat, Seba's short-tailed Carollia perspicillata AN0023 3198 3928 Bat, Vampire - Common Desmodus rotundus AN0023 3198 3928 Bat, Vampire - Lesser False Megaderma spasma AN0023 3198 3928 Bird, Blackbird - Red-winged Agelaius phoeniceus AN0020 3198 3928 Bird, Brown-headed Cowbird Molothurus ater AN0020 3198 3928 Bird, Chicken Gallus gallus AN0020 3198 3529 Bird, Duck - Domestic Anas platyrhynchos AN0020 3198 3928 Bird, Finch - House Carpodacus mexicanus AN0020 3198 3928 Bird, Finch - Zebra Taeniopygia guttata AN0020 3198 3928 Bird, Goose - Domestic Anser anser AN0020 3198 3928 Bird, Owl - Barn Tyto alba AN0020 3198 3928 Bird, Owl - Eastern Screech Megascops asio AN0020 3198 3928 Bird, Pigeon Columba livia AN0020 3198 3928 Bird, Quail - Japanese Coturnix coturnix japonica AN0020 3198 3928 Bird, Sparrow - Harris' Zonotrichia querula AN0020 3198 3928 Bird, Sparrow - House Passer domesticus AN0020 3198 3928 Bird, Sparrow - White-crowned Zonotrichia leucophrys AN0020 3198 3928 Bird, Sparrow - White-throated Zonotrichia albicollis AN0020 3198 3928 Bird, Starling - Common Sturnus vulgaris AN0020 3198 3928 Cat Felis domesticus AN0020 3198 279 Cow Bos taurus -
Mid-Atlantic Forage Species ID Guide
Mid-Atlantic Forage Species Identification Guide Forage Species Identification Guide Basic Morphology Dorsal fin Lateral line Caudal fin This guide provides descriptions and These species are subject to the codes for the forage species that vessels combined 1,700-pound trip limit: Opercle and dealers are required to report under Operculum • Anchovies the Mid-Atlantic Council’s Unmanaged Forage Omnibus Amendment. Find out • Argentines/Smelt Herring more about the amendment at: • Greeneyes Pectoral fin www.mafmc.org/forage. • Halfbeaks Pelvic fin Anal fin Caudal peduncle All federally permitted vessels fishing • Lanternfishes in the Mid-Atlantic Forage Species Dorsal Right (lateral) side Management Unit and dealers are • Round Herring required to report catch and landings of • Scaled Sardine the forage species listed to the right. All species listed in this guide are subject • Atlantic Thread Herring Anterior Posterior to the 1,700-pound trip limit unless • Spanish Sardine stated otherwise. • Pearlsides/Deepsea Hatchetfish • Sand Lances Left (lateral) side Ventral • Silversides • Cusk-eels Using the Guide • Atlantic Saury • Use the images and descriptions to identify species. • Unclassified Mollusks (Unmanaged Squids, Pteropods) • Report catch and sale of these species using the VTR code (red bubble) for • Other Crustaceans/Shellfish logbooks, or the common name (dark (Copepods, Krill, Amphipods) blue bubble) for dealer reports. 2 These species are subject to the combined 1,700-pound trip limit: • Anchovies • Argentines/Smelt Herring •