Recursos de colección

Aquatic Commons (36.918 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 5.691

  1. 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

  2. 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...

  3. 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...

  4. 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...

  5. 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...

  6. 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...

  7. 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...

  8. 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...

  9. 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...

  10. 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...

  11. 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...

  12. 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...

  13. 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...

  14. 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...

  15. Abudefduf vaigiensis (Quoy & Gaimard, 1825)

    Ketabi, Ramin; Jamili, Shahla
    Abudefduf vaigiensis (Indo-Pacific sergeant) may also be known as the Sergeant major although this name is usually reserved for the closely related species Abudefduf saxatilis. Adults live in coral reefs, tide pools, and rocky reefs. It is found in tropical and subtropical waters. Depth ranges of 1 to 15 meters are where people encounter this fish. A. Vaigiensis is benthopelagic. Maximum length is 17 cm in Persian Gulf. We report for the first time from Iranian waters (Kish Island). Its maximum recorded size is 20 centimeters. Often in aggregations feeding at midwater or tending nests among rocks and coral ledges....

  16. Chronic turbidity and stress in juvenile coho salmon and steelhead trout

    Redding, Joseph M.; Schreck, C.B.
    The goal of this project was to assess the general physiological responses of stress in coho salmon, Oncorhynchus kisutch, and steelhead trout, Salmo gairdneri, with respect to suspended solids in the aquatic environment and to relate these responses to the fish's capacity to survive and perform necessary physiological functions.

  17. The size and structure of pelagic dolphin herds

    Scott, Michael David

  18. Thalassoma lunare (Linnaeus, 1758)

    Ketabi, Ramin; Jamili, Shahla
    Thalassoma lunare is also named the Moon Wrasse because of its yellow caudal fin shapes like crescent moon with long upper and lower lobes. It is an inhabitant of coral reefs and surrounding areas at depths from 1 to 20. T. lunare is the most abundant wrasse species in the Persian Gulf. This species can reach 16 cm in total length in Iran, Persian Gulf, Kish Island. Moon wrasses are active fish, said to be moving all day long. They are also territorial, nipping, chasing, and otherwise harassing fish that get in their way. Being diurnal, wrasses have strong vision,...

  19. Sepia pharaonis (Ehrenberg, 1831)

    Ketabi, Ramin; Jamili, Shahla
    The Sepia pharaonis (pharaoh cuttlefish) is a large cuttlefish species, growing to 80 cm in mantle length. Males are larger than females, the maximum recorded size for males is 80 cm and 5 kg, and for females 50 cm and 2 kg in weight (Iran, Persian Gulf, Kish Island). This cuttlefish lives in warm water (30°C) and is fast growing. They mate and spawn at 110 days and their life span is 240 days. They lay about 1500 eggs which take 14 days to develop at 28°C. Inhabiting the neritic zone, it is often found in depths up to 130...

  20. Valenciennea sexguttata (Valenciennes, 1837)

    Ketabi, Ramin; Jamili, Shahla
    Valencienna sexguttata, the Sixspot goby, is a species of goby native to the Indian Ocean and the western Pacific Ocean. It inhabits bays or lagoons in waters of from 1 to 25 meters with silt or sand substrates with larger pieces of rock under which to burrow. Maximum length is 12 cm in Persian Gulf (Iran, Kish Island). V. sexguttata usually in pairs and lives in a burrow under rocks. Commonly seen in aggregations over large areas in lagoons of atolls. They are tireless workers, remain on all the substrate very clean due to the peculiarity of their power. The...

Aviso de cookies: Usamos cookies propias y de terceros para mejorar nuestros servicios, para análisis estadístico y para mostrarle publicidad. Si continua navegando consideramos que acepta su uso en los términos establecidos en la Política de cookies.