Recursos de colección

Aquatic Commons (36.940 recursos)

The Aquatic Commons is a thematic digital repository covering the natural marine, estuarine /brackish and fresh water environments . It includes all aspects of the science, technology, management and conservation of these environments, their organisms and resources, and the economic, sociological and legal aspects.

Subject = Biology

Mostrando recursos 1 - 20 de 5.697

  1. Two bird records of note in Galapagos in May 2006

    Meek, E.R.
    The seventh records in Galapagos of Parkinson’s Petrel Procellaria parkinsoni and of Pectoral Sandpiper Calidris melanotos are described.

  2. Distribution of fire ants Solenopsis geminata and Wasmannia auropunctata (Hymenoptera: Formicidae) in the Galapagos Islands

    Herrera, Henri W.; Causon, Charlotte E.
    The Little Fire Ant Wasmannia auropunctata (Roger) and the Tropical Fire Ant Solenopsis geminata (Fabricius) are considered two of the most serious threats to the terrestrial fauna of Galapagos, yet little is known about their distribution in the archipelago. Specimens at the Charles Darwin Research Station and literature were reviewed and distribution maps compiled for both species. W. auropunctata is currently recorded on nine islands and six islets and S. geminata is recorded on seven islands and six islets. New locations were registered, including the first record of W. auropunctata on Española and North Seymour islands, and of S. geminata...

  3. Alkaloidal protection of Utetheisa galapagensis (Lepidoptera:Arctiidae)against an invertebrate and a vertebrate predator in the Galapagos Islands

    Garrett, Sarah E.; Conner, William E.; Roque Albelo, Lázaro
    The Galapagos endemic moth Utetheisa galapagensis has been shown to sequester pyrrolizidine alkaloids from its host plants in the genus Tournefortia (Boraginaceae). We here assess the palatability of U. galapagensis adults to sympatric invertebrate and vertebrate predators. Adult U. galapagensis and Pilocrosis ramentalis (Pyralidae) controls, were offered to orb-weaving spiders Eustala vegeta and female lava lizards, Microlophus pacificus. The spiders’ reactions to the two types of prey were highly stereotyped; invariably the controls were eaten and the U. galapagensis were cut from the web and released. In comparison, when offered to female lava lizards both U. galapagensis and the pyralid controls...

  4. 1997-8 el Niño and the Galapagos tortoises Geochelone vandenburghi on Alcedo Volcano, Galapagos

    Marquez, Cruz; Wiedenfeld, David; Naranjo, Sixto; Llerena, Washington
    Body mass changes, mortality and nest and egg loss of the Galapagos tortoise Geochelone vandenburghi were studied on Alcedo Volcano, Isabela Island, before, during and after the El Niño event of 1997–8. The results suggest that fewer tortoises in the pre- and post-Niño periods gained body mass than lost, while during the El Niño event itself the tortoises gained mass. Before and after the El Niño, there was no mortality attributable to flooding in the ravines on the slopes of the volcano, but during the El Niño event 36 tortoises were found dead in the ravines. This is < 1 % of the total population....

  5. Galapagos commentary: Galapagos fur seal common name

    Grove, Jack; Brunner, Sylvia

  6. Pollen morphology of the Galapagos endemic genus Scalesia (Asteraceae)

    Jaramillo, Patricia; Trigo, M.M.
    Pollen grains from herbarium specimens of 22 taxa of the genus Scalesia Arn. (Asteraceae, Heliantheae) were examined by scanning electron and light microscopy. Scalesia present trizonocolporate, isopolar, radiosymmetric pollen grains, which are medium sized, oblate-spheroidal to prolate-spheroidal, circular in polar view and from circular to slightly elliptic in equatorial view. The exine is thick (c. 5–7 μm), with long, acute, conical echinae to 10 μm as supratectal elements.

  7. Controlling Invasives: Sea Grant Research Provides Insight into Lionfish Removal Efforts

    Stalling, C.; Albins, M.; Green, S.; Akins, L.; Appledoorn, R.S.; Tuohy, C.H.
    Sea Grant research across five state programs has focused on mitigating impacts from the lionfish invasion in the Western Atlantic and Caribbean by investigating different management strategies

  8. Boloceroides mcmurrichi (Kwietniewski, 1898)

    Ketabi, Ramin; Jamili, Shahla
    Boloceroides mcmurrichi is looking like an untidy mop, this anemone is sometimes seen in sea grass areas on many of our shores. It is possibly seasonal. Sometimes, large numbers are seen (up to 10-20 animals in a trip) and then none at all. Maximum length is 2 cm in Persian Gulf (Iran, Kish Island). Tiny swimming anemones may sometimes be confused with Sea grass anemones which have translucent tentacles with tiny spots. The swimming anemone harbors symbiotic single-celled algae (zooxanthellae). The algae undergo photosynthesis to produce food from sunlight. The food produced is shared with the sea anemone, which in...

  9. Alpheus djiboutensis (De Man, 1909)

    Ketabi, Ramin; Jamili, Shahla
    Alpheus djiboutensis, a member of snapping shrimp (Family Alpheidae) live in burrows together with gobiid fishes. Maximum length is 8 cm in Persian Gulf (Iran, Kish Island). A. djiboutensis is common in sponges and corals. A. djiboutensis lives on surfaces sandy depths at depths between 2 and 15 meters symbiosis between A. djiboutensis and Cryptocentrus lutheri (our observation in Iran, Persian Gulf, Kish Island). Despite being 2 completely different animals. They often live in symbiosis. The goby build a cave into the substrate which undertakes A. djiboutensis to clean and maintain, usually the C. lutheri stands so that its tail...

  10. Ecsenius pulcher (Murray, 1887)

    Ketabi, Ramin; Jamili, Shahla
    Ecsenius pulcher is an almost exclusively benthic species that inhabits tropical, marine waters. E. pulcher is found on rocky shores where it hides in crevices. Maximum standard length is 4.4 cm male/unsexed. Maximum length is 7 cm in Persian Gulf (Iran, Kish Island). Larvae are planktonic, often found in shallow coastal waters. E. pulcher can have different color patterns. Dark brown dorsally on head and body and (abruptly) white below or dark brown and posterior part of the body is orange-yellow with narrow dark bars. E. pulcher has a solid color form and one in which the melanophores have been...

  11. Plakobranchus ocellatus (van Hasselt, 1824)

    Ketabi, Ramin; Jamili, Shahla
    Plakobranchus ocellatus is a common inhabitant of shallow coral reef pools and lagoons. It is seldom seen as it is well-camouflaged, half buried in the coral sand. P. ocellatus lives in sheltered, shallow water habitats with stones or gravel and silt. Maximum length is 6-7 cm in Persian Gulf (Iran, Kish Island). It may seem puzzling that this slug has evolved a method of storing chloroplasts, but at the same time shades them from the sunlight which would allow them to photosynthesis and provide nourishment for the slug. It is a theory, which is totally untested, that P. ocellatus deliberately...

  12. Alticus kirkii (Günther, 1868)

    Ketabi, Ramin; Jamili, Shahla
    The Kirk's blenny (Alticus kirkii) is a species of combtooth blenny (family Blenniidae) in the genus Alticus. It is a tropical blenny. Adults are found in the intertidal zone of exposed rocky shores, often out of the water and down to around 2 m and often spend time out of the water. They are able to breathe air when on land. Air-breathing A. kirkii utilize both aquatic and terrestrial habitats. They actively shuttle back and forth between rock pools and air (skipper). During the day it emerges from the water to feed upon the algae growing in the splash zone...

  13. Pseudobiceros kryptos (Newman & Cannon, 1997)

    Ketabi, Ramin; Jamili, Shahla
    Pseudobiceros kryptos is usually found on colonial ascidians under rubble on the reef crest or reef slope. P. kryptos is free swimming flatworm. New record is given from Persian Gulf (Iran, Kish Island). P. kryptos is the only polyclads which actively swim with exaggerated undulations of its ruffled margin. This, along with flamboyant coloration, is thought to be aposematic or warning behavior advertising their suspected unpalatability to visual predators such as fish. P. kryptos is in part: "Background color variable; mottled olive green to lime green and white, large irregular brown and olive green spots on the margin, large irregular...

  14. Haminoea cyanomarginata (Heller & Thompson, 1983)

    Ketabi, Ramin; Jamili, Shahla
    Haminoea cyanomarginata is found in the coral rubble in shallow waters, while in the Persian Gulf it is usually seen at night, between 2-5 in of depth, on rocky surfaces covered with algae. We report for the first time from Persian Gulf (Kish Island, Iran). Maximum length is 5 mm in Persian Gulf. We can observe H. cyanomarginata only 2-3 days in March in each year in Kish Island (Iranian Waters). It has a number of distinctive color features, the most prominent being the purple edge to the parapodia, head shield, and infrapallial lobe. The body, and mantle, which can...

  15. Goniobranchus annulatus (Eliot, 1904)

    Ketabi, Ramin; Jamili, Shahla
    Goniobranchus annulatus is a species of sea slug, a very colourful dorid nudibranch, a shell-less marine gastropod mollusc. G. annulatus inhabits various sections of coral reefs, ranging from the shallow subtidal adjacent to mangrove forests up to 15 m depth near the reef crest. G. annulatus forms mating aggregations similar to those found in many sea hares. G. annulatus is simultaneous hermaphrodites. Both individuals darts their penis toward each other to induce one to act as a male and the other as the female. The victorious one to penetrate the body wall is the dominant male. Eggs are deposited on...

  16. Pseudoceros prudhoei (Newman & Cannon, 1994)

    Ketabi, Ramin; Jamili, Shahla
    Pseudoceros prudhoei is usually found on rocky or reef habitats, swimming in open waters or under coral rubble plates, where they find their prey, the ascidians. Maximum length is 5 cm in Persian Gulf (Iran, Kish Island). While some of the free-living flatworms tend to hide under rocks escaping from the sunlight, colorful polyclads usually demonstrate a very conspicuous behavior, swimming through the water column next to coral reefs. These animals actually do not need to avoid predators, because their bright color pattern works as a warning sign about their distastefulness and toxicity. None of the animals had a negative...

  17. Sabellastarte spectabilis (Grube, 1878)

    Ketabi, Ramin; Jamili, Shahla
    Sabellastarte spectabilis is commonly known as the feather duster worm, feather duster or fan worm. It has reported for the first time from Iranian waters (Kish Island) and finding in the intertidal and subtidal reefs. Especially common in sites where phytoplankton is abundant. The worm's body occupies a flexible mucus tube formed by adhesion of silt from the water column. Polychaetes, or marine bristle worms, have elongated bodies divided into many segments. Each segment may bear setae (bristles) and parapodia (paddle-like appendages). Some species live freely, either swimming, crawling or burrowing, and these are known as "errant". Others live permanently...

  18. Megalomma vesiculosum (Montagu, 1815)

    Ketabi, Ramin; Jamili, Shahla
    Megalomma vesiculosum (Giant Feather Duster Worm) has reported for the first time from Persian Gulf (Iran, Kish Island). M. vesiculosum is a polychaete worm that reaches up to 12 cm in length. It has relatively few (about 50) tentacles, each with a large eyespot at the free end. It creates a long and tough tube, which is mostly encrusted untidily with large shell fragments and small stones. The tube protudes no more than 40-50 mm (in Iran, Kish Island) from coarse sand or muddy gravel at low water and below. The body and crown vary in color from yellowish to...

  19. Cheilinus lunulatus (Forsskål, 1775)

    Ketabi, Ramin; Jamili, Shahla
    The Cheilinus lunulatus (broomtail wrasse) is a species of wrasse native to the Red Sea and Indian Ocean. It is another one of the big wrasses which has a very low abundance on the local scale and in this case a limited geographical distribution. Broomtail wrasse lives in shallow waters, but also at 2 to 30 m of depth on the outer side of the reefs. It is often going around on the sandy bottoms, at the limit of the madreporic formations, in the prairies of submerged grasslands looking for shells it crushes easily, like a nutcracker. C. lunulatus can...

  20. Scorpaenopsis barbata (Rüppell, 1838)

    Ketabi, Ramin; Jamili, Shahla
    Scorpaenopsis barbata, lives along sandy beaches, rocky coastlines and coral reefs and in shallow waters. Its name refers to the fleshy outgrowth of skin protruding from its chin. They have a wide mouth and broad spiny head and venom glands that may occur at the base of fin spines which can produce deep and painful wounds. The feathery fins which cover the scorpion fish body help in the camouflaging of the animals into the surrounding coral. Also, the coral- like frilly, fleshy flaps of skin protruding from its chin add to the species camouflage ability and help the fish to...

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