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Full-Text Articles in Life Sciences
Feeding-Habits Of The Gray Tilefish, Caulolatilus-Microps (Goode And Bean, 1878) From North-Carolina And South-Carolina Waters, Jl Ross
VIMS Articles
Gray tilefish, Cau/o/atilus microps, were collected from 1972 to 1977 between depths of 70 to 236 m off North Carolina and South Carolina, Gray tilefish are demersal, opportunistic predators that consume fishes and macroinvertebrates closely associated with the substrate, The principal components of their diets, in decreasing order of importance, are: crabs, shrimp, fish, echinoderms (holothurians, echinoids, stelleroids), polychaetes, ascideans, molluscs (gastropods and bivalves), stomatopods and sipunculids. As tilefish grow, they consume larger prey. Their generalized feeding is similar to other branchiostegids. This strategy is advantageous for predation on the faunal assemblages of the shelf-edge habitat where the species diversity …
Anaerobic Mortalities Of Oysters In Virginia Caused By Low Salinities, J. D. Andrews
Anaerobic Mortalities Of Oysters In Virginia Caused By Low Salinities, J. D. Andrews
VIMS Articles
Oysters on natural beds in the upper seed area of the James River died anaerobically in the winter and early spring of 1979-80 during prolonged exposure to fresh water and low salinities (< 5 ppt). Heavy rains in .the fall of 1979 combined with the usual winter-spring runoff to produce low salinities. Oysters in trays were transplanted in late March and early April to six high-salinity areas where mortalities were found a month later. The oysters died slowly within closed shells because they were unable to feed and respire in the nearly fresh water. This produced a strong, malodorus stench and blackened shell margins that are characteristic of anaerobiotic decay. Similar phenomena occurred previously in the Rappahannock River about 1 May during several wet years during the past three decades. At depths of 5 to 6 m, dissolved oxygen was depleted and everything on the bottom became black with iron and other heavy metal sulfides. Dead oysters were not discovered until June after waters had become aerobic again.
Epizootiology Of Late Summer And Fall Infections Of Oysters By Haplosporidium Nelsoni, And Comparisons To Annual Life Cycle Of Haplosporidium Costalis, A Typical Haplosporidan, J. D. Andrews
VIMS Articles
The two haplosporidan parasites that cause diseases of oysters along the middle North Atlantic coast of North America differ in their habitats, in timing of oyster mortalities, and in their adaptations to the host. Haplosporidium nelsoni (MSX) kills oysters throughout the year over a wide range of salinities (about 15 to 30 ppt). It has a long infective period of nearly 6 months. This pathogen rarely completes sporulation in its life cycle in oysters. It is highly pathogenic and exhibits irregular activity suggesting that it is poorly adapted to the host species. In contrast, Haplosporidium costalis (SSO) has a short, …
Larval Development Of Citharichthys-Cornutus, Citharichthys-Gymnorhinus, Citharichthys-Spilopterus, And Etropus-Crossotus (Bothidae), With Notes On Larval Occurrence, John W. Tucker Jr.
Larval Development Of Citharichthys-Cornutus, Citharichthys-Gymnorhinus, Citharichthys-Spilopterus, And Etropus-Crossotus (Bothidae), With Notes On Larval Occurrence, John W. Tucker Jr.
VIMS Articles
No abstract provided.
Biological Results Of The University-Of-Miami Deep-Sea Expeditions .136. A New Eelpout (Teleostei, Zoarcidae) From The Eastern Tropical Pacific-Ocean, Me Anderson
VIMS Articles
A new ee]pout, Lycenchelys rnonstrosa, is described from the lower continental slope of the Gulf of Panama, eastern Pacific Ocean. It is distinguished from all other Lycenchelys in the region by possessing nine preopercu]omandibular pores, eight or nine suborbital pores, one postorbital pore, no occipital or interorbital pores, 126-132 vertebrae and far posterior dorsal fin origin, with three to seven free dorsal pterygiophores. The species appears to be somewhat peculiar among eel pouts in that 11 of the 12 known specimens lack pelvic fins; one of the fish without pelvic fins is the only one known with palatine teeth. Both …
Preliminary Observations On The Usefulness Of Hinge Structures For Identification Of Bivalve Larvae, R. Lutz, J. Goodsell, M. Castagna, S. Chapman, C. Newell, H. Hidu, R. Mann, Et Al
Preliminary Observations On The Usefulness Of Hinge Structures For Identification Of Bivalve Larvae, R. Lutz, J. Goodsell, M. Castagna, S. Chapman, C. Newell, H. Hidu, R. Mann, Et Al
VIMS Articles
Difficulties associated with discrimination of bivalve larvae isolated from plankton samples have long hampered both applied and basic research efforts in estuarine and open coastal marine environments. The vast majority of practical barriers to identification of larval bivalves may be eliminated through routine optical microscopic examination of the hinge apparatus of disarticulated larval shells. Representative micrographs of various ontogenetic stages of larval hinge development are presented for 12 genera (Mytilus, Geukensia, Crassostrea, Placopecten. Argopecten. Mya, Spisula, Mulinia, Ensis, Arca, Arctica. and Mercenaria) from 9 bivalve superfamilies (Mytilacea, Ostreacea. Pectinacea, Myacea, Mactracea. Solenacea, Arcacea, Arcticacea. and Veneracea). The larval hinge apparatus …