RFMHKXW8–Acorn bay barnacle, Amphibalanus improvisus, an invasive harmful species
RFC1RHT1–Barnacle (Balanus improvisus), Black sea, Ukraine,
RFMJ1E2T–Acorn bay barnacle, Amphibalanus improvisus, an invasive harmful species
RMBC1HNG–Bay barnacle, (Balanus improvisus), Sweden
RMB51W9F–Balanus improvisus, bay barnacles, bay barnacles on the head of a crab
RMW231RA–Archive image from page 125 of Danmarks fauna; illustrerede haandbøger over. Danmarks fauna; illustrerede haandbøger over den danske dyreverden.. danmarksfaunaill38dans Year: 1907 122 Fig. 42. 1 : Balanus balanoides (fra neden og fra oven, samt scu- tum og tergum). — 2: B. improvisus (2 a: Gennemsnit af Skal- plade set fra neden; 2b: Basalplade; 2c: Skallen set fra oven; man ser Basalpladen, idet Laagpladerne er fjernet). — 3: B. cre
RMRHNXCJ–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. MOULTING IN BALANUS IMPROVISUS 427 1-13 growth is slow, from 13 to 22 days there is an increase, but from 22 days to 37 and 46 days, respectively, the accumulated increase is even greater. It appears as though growth is following an S curve. A comparison of the average growth of 10 barnacles grown in the Beaufort Harbor with 10 grown in the laboratory on Chlamydomonas sp. is shown in Figure 5. The 10 in the Harbor were eliminated at twelve days by sheepshead at the end of the settling period of B. improvisus. In the spring o
RMPFHJJK–. Danmarks fauna; illustrerede haandbøger over den danske dyreverden... 93 eller en Smule fremefter; hele Legemet er blevet noget slankere. Hele Rygsiden besat med fine Børster, der er noget større langs Kanten og paa Haletornen. Frontal- filamenterne er blevet toleddede. Overlæben naar nu kun til Basis af 2. Par kløftede Svømmeben (i 1. Stadie er Basis helt dækket). Ventrale Abdominalvedhæng er blevet længere, slankere, ved dets Basis et Par kraftige Torne,. Fig. 32. Balanus improvisus (1: Nauplius, delvis set fra Ryggen; Skjoldet med de bageste Rygtorne begynder at vokse ud. 2: Meta- naupliu
RMMCTMA7–. Fig. 5. Balanus algicola Pilsbry, 1916. Specimens fixed on spine of the second dorsal fin of Squalus acutiformis. to Gruvel (1910), a small specimen of B. juaxillaris is found on a spine of Acanthias vulgaris, also from Simonstown. Probably this specimen is to be preferred to Balatius algicola, a species not known before 1916. B. improvisus is also mentioned by Ciurea, Monod and Dinulesco, 1933, from a fish, the mandible of Lucioperca lucioperca. From other material I have found Balanus algicola fixed even on mussel shells. These examples also show that the species is not always of very smal
RFMHKXWF–Acorn bay barnacle, Amphibalanus improvisus, an invasive harmful species
RFMJ1E5P–Acorn bay barnacle, Amphibalanus improvisus, an invasive harmful species
RMRX8EE6–Ecological animal geography; an authorized, Ecological animal geography; an authorized, rewritten edition based on Tiergeographie auf ockologischer grundlage ecologicalanimal00hess Year: 1937 284 MARINE ANIMALS mina maritima and further in the northeast a large number of rotifers. The salt content of 3.70 seems to set limits which even euryhaline sea animals pass with difficulty; only the barnacle Balanus improvisus and the bryozoan Membranipora pilosa extend beyond it. Fig. 76.—Map of the Baltic Sea. The salt content per thousand in vertical figures, the depth in meters in oblique figures.
RMRHJXJ5–. Biology of the seas of the U.S.S.R. Marine biology -- Soviet Union; Hydrology -- Soviet Union. THE BLACK SEA 455 sp. relicta, Vivipara vivipara, Theodoxus danubialis, Unio tumidus, Ponto- gammarus maeoticus, Corophium volutator, ? nobile, Balanus improvisus, Oligochaeta, Tendipedidae, Hypaniola invalida, Nereis spp., Mytilus gallo- provincialis. Half of them are 'Caspian' and 2 or 3 fresh-water forms. The average biomass of the bottom biocoenoses is from a few grammes to 1 kg per m2. The bentho-nectic biocoenoses are formed of 'Caspian' mysids; fresh- water Rotifera and crustaceans are great
RMPFHJJY–. Danmarks fauna; illustrerede haandbøger over den danske dyreverden... 92 Efter flere Hudskifter, 7—10 Dage efter Udklækningen af Ægget, sætter Cyprislarven sig fast paa et Underlag. Men derefter begynder Skalmusklerne at virke paa en ejendommelig Maade: Skallerne aabner sig i Rygsiden og glider ud fra hinanden, medens de to Bugkanter støder sammen, idet Larven altsaa ligger med Bugen i Vejret. Den underste Del (altsaa Rygsiden) vokser ud til en for- holdsvis stor, gelatinøs Plade, som efterhaanden udvikler. Fig. 31. Balanus improvisus (1: 1. Nauplie set fra Bugen; 2—4: 2. Nauplie (2: set fra
RFMYAGH9–Acorn bay barnacle, Amphibalanus improvisus, an invasive harmful species
RMRE2H71–. Ecological animal geography; an authorized, rewritten edition based on Tiergeographie auf ockologischer grundlage. Zoogeography -- Geographical distribution; Animal ecology. 284 MARINE ANIMALS mina maritima and further in the northeast a large number of rotifers. The salt content of 3.7%0 seems to set limits which even euryhaline sea animals pass with difficulty; only the barnacle Balanus improvisus and the bryozoan Membranipora pilosa extend beyond it.. Fig. 76.—Map of the Baltic Sea. The salt content per thousand in vertical figures, the depth in meters in oblique figures. After Brandt. Ma
RMPFHJG3–. Danmarks fauna; illustrerede haandbøger over den danske dyreverden... 122. Fig. 42. 1 : Balanus balanoides (fra neden og fra oven, samt scu- tum og tergum). — 2: B. improvisus (2 a: Gennemsnit af Skal- plade set fra neden; 2b: Basalplade; 2c: Skallen set fra oven; man ser Basalpladen, idet Laagpladerne er fjernet). — 3: B. cre. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Dansk naturhistorisk forening. København, G. E.
RMRHNX9G–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 428 JOHN D. COSTLOW, JR. AND C. G. BROOKHOUT MOULTING PERIODS AND PERCENTAGE OF MOULTS IN BALANUS IMPROVISUS SERIES II. 40 DAYS 45 50 DAYS 55 FIGURE 2. Series II received a mixed culture of Nitsschia closterium and Chlamydomonas sp. from day 1-57. The numbers above the peaks indicate the moult number.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marin
RMRG86T5–. Bulletin - United States National Museum. Science. Fig. 16.—a, Balanus improvisus x 3, quinnepiac, mass.; 6, B. ebueneus x 2, ocean city, md., to ILLUSTRATE DIFFERENCE IN THE KADH. also of a rather brighter yellow. The largest specimens which I have seen are those from the Plata and those attached to a ship from the West Indies, and they had a basal diameter of 0.6 of an inch—from 0.4 to 0.5 of an inch is the more usual full aver- age size. Scuta, with the lines of growth but little prominent; articular ridge prominent but little reflexed; adductor ridge straiglit and very prominent, varying
RMRR0RC1–. Advances in marine environmental research : proceedings of a symposium. Marine ecology -- Research; Marine ecology. Figure 18-7. Examples of computer tracked paths for stage II Balanus improvisus nauplii and assigned rate of change of direction values (degrees/sec): A) 114, B) 53, C) 152, D) 373. NOTE: Paths A, B are typical of control conditions; path C occurs more fre- quently with copper present; path D was observed only above 50 ppb copper. DISCUSSION Initial results have demonstrated possible use of invertebrate larval swimming behavior as a sublethal response index. It has also been sh
RMRHJX5P–. Biology of the seas of the U.S.S.R. Marine biology -- Soviet Union; Hydrology -- Soviet Union. 496 BIOLOGY OF THE SEAS OF THE U.S.S.R.. 9. SYNDESMYA OVATA 10. POLYCHAETA NEPHTHYS HOMBERGl" II. MOLUSC HYDROBIA VENTROSA 1. PONTOGAMMARUS MOEOTICUS 2. BEDS OF ZOSTERA MARINA 3. MYTILASTER LINEATUS 4. NEREIS SUCCINEA 5. A STONE WITH BALANUS IMPROVISUS 12. BRACHINOTUS LUKASI 6. CARDIUM EDULE 13. OSTROUMOVIA 7. NEREIS DIVERSICOLOR M. BLACKFORDIA 15. GOLDEN SHINER 8. CARBULOMYA MAEOTICA 16. PIKE PERCH 17. ANCHOVY 18. CLUPEONELLA 19. STURGEON 20. STARRED STURGEON Fig. 237. Character of the distri
RMRHM4GW–. The Biological bulletin. Biology; Zoology; Marine biology. Figure 1. An example of computer analysis of a single Balanus improvisus nauplius. Digital processing of a video tape produces a computer tracking of the nauplius (A). A light stimulus (480 nm, 0.06 W/nr) was applied from 2.6 to 5.1 sec. Linear velocity (B) and direction of travel (C) are calculated at 0.1-sec intervals (stimulus at 0°) and mean values for desired time intervals (D) determined. Light-adapted stage II nauplii (15° C, 20c/« ) were exposed to 480 nm light at five intensities ranging from 27 to 0.0027 W/nr. The initial M
RMRD3NT3–. Danmarks fauna; illustrerede haandbøger over den danske dyreverden... 93 eller en Smule fremefter; hele Legemet er blevet noget slankere. Hele Rygsiden besat med fine Børster, der er noget større langs Kanten og paa Haletornen. Frontal- filamenterne er blevet toleddede. Overlæben naar nu kun til Basis af 2. Par kløftede Svømmeben (i 1. Stadie er Basis helt dækket). Ventrale Abdominalvedhæng er blevet længere, slankere, ved dets Basis et Par kraftige Torne,. Fig. 32. Balanus improvisus (1: Nauplius, delvis set fra Ryggen; Skjoldet med de bageste Rygtorne begynder at vokse ud. 2: Meta- naupliu
RMRHM4E2–. The Biological bulletin. Biology; Zoology; Marine biology. Figure 4. Distribution of mean direction of travel for 38 stage II Balanus improvisus exposed to a 480 nm, 2.7 W/nr light stimulus at 0° : (A) directional response during full 2.5-sec stimulus; (B) directional response during the latter 2.0 sec of the same stimulus. Stage II response spectrum Dark-adapted stage II naiiplii (20° C, 15'^) were exposed to filtered light from 440 to 640 nm in 20-nni increments. Quantal intensity was balanced to approxi- mately 0.07 X 101G quanta m2 sec at each wavelength (calculated values ranged. 520 56
RMRHM4EK–. The Biological bulletin. Biology; Zoology; Marine biology. LIGHT RESPONSES OF BARNACLE NAUPLII A B 173. Figure 4. Distribution of mean direction of travel for 38 stage II Balanus improvisus exposed to a 480 nm, 2.7 W/nr light stimulus at 0° : (A) directional response during full 2.5-sec stimulus; (B) directional response during the latter 2.0 sec of the same stimulus. Stage II response spectrum Dark-adapted stage II naiiplii (20° C, 15'^) were exposed to filtered light from 440 to 640 nm in 20-nni increments. Quantal intensity was balanced to approxi- mately 0.07 X 101G quanta m2 sec at each
RMRD3NT6–. Danmarks fauna; illustrerede haandbøger over den danske dyreverden... 92 Efter flere Hudskifter, 7—10 Dage efter Udklækningen af Ægget, sætter Cyprislarven sig fast paa et Underlag. Men derefter begynder Skalmusklerne at virke paa en ejendommelig Maade: Skallerne aabner sig i Rygsiden og glider ud fra hinanden, medens de to Bugkanter støder sammen, idet Larven altsaa ligger med Bugen i Vejret. Den underste Del (altsaa Rygsiden) vokser ud til en for- holdsvis stor, gelatinøs Plade, som efterhaanden udvikler. Fig. 31. Balanus improvisus (1: 1. Nauplie set fra Bugen; 2—4: 2. Nauplie (2: set fra
RMRHN6DC–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FIGURE 4. Distribution of mean direction of travel for 38 stage II Balanus improvisus exposed to a 480 nm, 2.7 W/nr light stimulus at 0° : (A) directional response during full 2.5-sec stimulus; (B) directional response during the latter 2.0 sec of the same stimulus. Stage II response spectrum Dark-adapted stage II nauplii (20° C, l5(/cc) were exposed to filtered light from 440 to 640 nm in 20-nm increments. Quantal intensity was balanced to approxi- mately 0.07 X 1016 quanta iir sec at each wavelength (calculated values rang
RMRHM4F3–. The Biological bulletin. Biology; Zoology; Marine biology. 172 LANG, FORWARD. JR. AND MILLER LIGHT FINAL DARK. Figure 3. Distribution of mean direction of travel of stage II Balanus improvisus during initial 2.5-sec "dark" interval, 2.5 sec 480-nm light stimulus at 0°, and final 3.0-sec "dark" interval: (A) 27 W/m2; (B) 2.7 W/m'; (C) 0.27 W/m*; (D) 0.027 W/m*; (E) 0.0027 W/m3. Sample numbers and "dark" condition are as in Figure 2. Significantly (P<;0.05) nonrandom distributions are indicated in Table I.. Please note that these images are extracted from scann
RMRHM4FF–. The Biological bulletin. Biology; Zoology; Marine biology. "01 2345678 SECONDS Figure 2. The running mean linear velocity ± variance of stage II Balanus improvisus nauplii in response to a 480-nm light stimulus applied at 2.6 to 5.1 sec: (A) 27 W/m2; (B) 0.27 W/nr; (C) 0.027 W/m2; (D) 0.0027 W/nr; (E) 0.00027 W/ma. The number of nauphar paths analyzed (N) is indicated. Initial and recovery represent "dark" periods of 830-nm sub- stage illumination only.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability -
RMRHN6E4–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 45?;. FIGURE 4. Distribution of mean direction of travel for 38 stage II Balanus improvisus exposed to a 480 nm, 2.7 W/nr light stimulus at 0° : (A) directional response during full 2.5-sec stimulus; (B) directional response during the latter 2.0 sec of the same stimulus. Stage II response spectrum Dark-adapted stage II nauplii (20° C, l5(/cc) were exposed to filtered light from 440 to 640 nm in 20-nm increments. Quantal intensity was balanced to approxi- mately 0.07 X 1016 quanta iir sec at each wavelength (calculated value
RMRHMHPX–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. B. N-34 N-38 N-35 N-30 345 SECONDS 8 FIGURE 2. The running mean linear velocity ± variance of stage II Balanus improvisus nauplii in response to a 480-nm light stimulus applied at 2.6 to 5.1 sec: (A) 27 W/nr; (B) 0.27 W/nr; (C) 0.027 W/m2; (D) 0.0027 W/m2; (E) 0.00027 W/m2. The number of naupliar paths analyzed (N) is indicated. Initial and recovery represent "dark" periods of 830-nm sub- 3tage illumination only.. Please note that these images are extracted from scanned page images that may have been digitally enha
RMRR29BW–. Advances in marine environmental research : proceedings of a symposium. Marine ecology -- Research; Marine ecology. 20- 10- number of paths analyzed, MDP = mean duration of paths —I—I—'—I—I—I—I—p—I—1 30 20 10 ? 0 30 20 -? 10 .. 0 30 20 - 10. I I 1 I I 0 I 2 MM/SEC Figure 18-4. Examples of mean linear velocity (mm/sec) dis- tribution Anthin five test groups of stage II barnacle nauplii: NOTE: A) Balanus improvisus from Rhode Island at 20°C, B) Chthamalus fragilis at 20°C, C) Balanus amphitrite control, D) B. amphitrite with 24 hr. exposure to 20 ppb Cu, E) B. amphitrite with 24 hr. exposure
RMRHNX8G–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. MOULTING IN BALANUS IMPROVISUS 431 DAILY INCREASE IN AREAL GROWTH IN BALANUS IMPROVISUS 16.00 LU t- LJ LJ cr 15.00-- 14.00- 13.00- 12.00- II.OO-I- 10.00-- 9.00 T 8.00 -- O 7.00 6.00-- 5.00- 4.00 3.00 -i- 2.00^ I.OO-- 0. GROWN IN HARBOR. * FED ON CHLAMYDOMONAS. •* FED ON MIXED CULTURE NITZSCHIA-CHLAMYDOMONAS. « DAY 1-6 NO FOOD; DAY 6-33, NITZSCHIA; DAY 34-46, NITZSCHIA- CHLAMYDOMONAS. I I = 1 I I I 5 10 15 20 25 30 35 40 45 50 DAYS FIGURE 5. Comparison of daily increase in areal growth in Balanus improvisus grown in the Harbo
RMRG84J9–. Bulletin - United States National Museum. Science. lb. 5c 1-2, Balanus eburneus; 3-3b, 5-5d, B. improvisus; 4, B. amphitrite peruvianus. For explanation of figures see page 343. I: 5d. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt P
RMRHKY2J–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. BODY VERSUS SHELL GROWTH IN BALANUS 229 Shell growth. In contrast to the body, which may grow only at the time of molting, the calcareous plates of the shell grow continuously. Figure 3 compares the growth rates of shell and maxillae for one barnacle. As indicated previously, there were periods up to three molts when no increase in maxillae size occurred. During this same interval of time the shell continued to grow. Costlow and Bookhout (1953), comparing shell growth of B. improvisus in the laboratory with that found in the
RMRD1XBK–. Danmarks fauna; illustrerede haandbøger over den danske dyreverden... 122. Fig. 42. 1 : Balanus balanoides (fra neden og fra oven, samt scu- tum og tergum). — 2: B. improvisus (2 a: Gennemsnit af Skal- plade set fra neden; 2b: Basalplade; 2c: Skallen set fra oven; man ser Basalpladen, idet Laagpladerne er fjernet). — 3: B. cre. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Dansk naturhistorisk forening. København, G. E.
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