Recursos de colección

Aquatic Commons (36.877 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 = Fisheries

Mostrando recursos 1 - 20 de 13.106

  1. 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...

  2. 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...

  3. 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...

  4. 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...

  5. 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...

  6. 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...

  7. 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....

  8. The size and structure of pelagic dolphin herds

    Scott, Michael David

  9. 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,...

  10. 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...

  11. 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...

  12. Gymnothorax undulatus (Lacepède, 1803)

    Ketabi, Ramin; Jamili, Shahla
    The Gymnothorax undulatus (undulated moray) is a distinctive moray eel, taking its name from the pattern of light undulating lines that form a faint net-pattern along its long, sinuous body. Like other moray eels, the undulated moray does not have scales, and so to protect itself from parasites and scrapes, it secretes a protective layer of mucus over the thick, muscular body. The G. undulatus is a nocturnal species that uses its keen sense of smell to actively and aggressively hunt for fish, octopus and crustaceans, consuming almost anything that will fit in its mouth. When prey is captured, it...

  13. Holothuria hilla (Lesson, 1830)

    Ketabi, Ramin; Jamili, Shahla
    Holothuria hilla is belong to soft-bodied holothuroid, a nocturnal species and is found on inner reef flats, usually in seagrass beds or coral rubble, to depths of 3-20 m. During the day H. hilla can be found under coral rubble, emerging at night to feed. Detritivorous deposit feeder.. During the day it was found under coral rubble, emerging at night to feed. Members of the class Holothuroidea are gonochoric and have only one gonad. H. hilla has asexual and sexual reproduction. This species is usually rare, it is likely that the species has proliferated on rarely site by asexual reproduction...

  14. Impact numerical estimation of organophosphate pesticides pollution in economic fishes of South Caspian sea estuaries using AchE bioassay (biomarker)

    Golshani, Reza
    In this study the distribution and accumulation of diazinon, malathion and azinfos methyl in mullet fish Liza aurata, caspian white fish Rutilus frissi kutum and common carp fish Cyprinus carpio from five estuaries along the Caspian Sea was investigated. Also, the effect of pesticides concentration on the acetylcholinesterase enzyme (AChE) in fish species was studies. Pesticides concentration varied with fish species, sampling station and toxin type. The results indicate that the pesticides concentration varied from 0.01 to 0.16 mg/kg for diazinon, 0.01 to 0.15 mg/kg for malathion and 0.05 to 0.36 mg/kg for azinfos methyl in three fish species. There...

  15. 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...

  16. Platax teira (Forsskål, 1775)

    Ketabi, Ramin; Jamili, Shahla
    Platax teira, also known as the teira batfish, longfin batfish, longfin spadefish is known to associate with floating seaweed, debris and artificial reefs. We report for the first time from Persian Gulf (Kish Island, Iran). Maximum length is 40-50 cm in Persian Gulf. Juveniles and adults occur inshore on protected reefs and in mangrove areas and also on wrecks and deep reefs to 20 m; they may be solitary, in pairs, or in large schools. Small juveniles with floating debris and form aggregations as they find each other. They can be pelagic to large sizes and form schools under large...

  17. Gobiodon citrinus  (Rüppell, 1838)

    Ketabi, Ramin; Jamili, Shahla
    Gobiodon citrinus, the Poison Goby, is a species of goby native to the Indo-West Pacific: Red Sea south to Delagoa Bay, Mozambique and east to Samoa, north to southern Japan, south to the Great Barrier Reef, we report for the first time from Persian Gulf (Kish Island, Iran). Maximum length is 6 cm in Persian Gulf. They are reef dwellers being found at depths of from 2 to 8 meters (in Kish Island, Iran) and in association with Acropora corals. The mucus produced by this fish is toxic. Juveniles have bright yellowish tones (with some darker variations according to geographic...

  18. Doryrhamphus excisus abbreviatus (Dawson, 1981)

    Ketabi, Ramin; Jamili, Shahla
    D. excisus abbreviatus is classified by IUCN Red List, it is belong to a group of brightly-coloured flagtail pipefish. This species is endemic to the Red Sea from the Gulf of Suez south to Massawa and Jiddah on the east coast, we report for the first time from Persian Gulf (Kish Island, Iran). Most Doryrhamphinae pipefishes will breed readily in captivity when given enough shelter and can live for about five to ten years. Males may be brooding at 33 mm Standard Length (Dawson 1981). Male Doryrhamphus brood eggs semi-exposed under the trunk, and sometimes have a thin skin covering...

  19. Pseudochromis olivaceus  (Rüppell, 1835), Olive Dottyback

    Ketabi, Ramin; Jamili, Shahla
    Pseudochromis olivaceus (Olive Dottyback) was always found in association with coral overhangs or large rubble pieces on hard bottom substrates, and would retreat under the rubble or overhang when approached. P. olivaceus is species of Pseudochromis native to Gulf of Aqaba, Indian Ocean: Red Sea, we report for the first time from Persian Gulf (Kish Island, Iran). Relatively large specimens of P. olivaceus that inhabit these corals were observed preying on settlers of Dascyllus spp. Maximum length is 8 cm in Persian Gulf. They are reef dwellers being found at depths of from 4 to 8 m and in association...

  20. Étude morphologique et physiologique du sang, de l'immunité naturelle et acquise chez quelques poissons Indochinois

    Durand, J.
    This paper deals with a morphological study on blood of some Indochinese freshwater fishes. The study has been split in two parts: one dedicated to compare some fishes' blood and the second part focused on reaction of cells and natural immunity.

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.