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Records of odontocetes in the northern Indian Ocean (1981–1982) and off the coast of Sri Lanka (1982–1984)
OLR ( 1987} 34 (9)
E. Biological Oceanography
A model takes as its structural unit the single cell, using Spudich and Sager's transition point hypothesis for the coupling between received light and cell cycle progression. The model predicts that the characteristics of cell division patterns in populations entrained by photocycles depends mainly on the position of the transition point within the cell cycle, rather than on the characteristics of the photocyclic regime. The model can be used to predict division patterns in high frequency photocycles and during transients induced by shifts in light regime. Chisholm: Ralph M. Parsons Lab. 48-425, MIT, Cambridge, MA 02139, USA. 87:5147 Vernet, Maria and C.J. Lorenzen, 1987. The presence of chlorophyll b and the estimation of phaeopigments in marine phytoplankton. J. Plankt. Res., 9(2):255-265. A reverse-phase h.p.l.c, technique was used to estimate the concentration of chl b in phytoplankton cultures, fecal pellets of Calanus pacificus, and suspended particulate matter from the central North Pacific, Oregon coastal waters, and Dabob Bay (a temperate fjord in Puget Sound, Washington). Zooplankton fecal pellets showed significant chl b enrichment, suggesting grazing as a mechanism to explain high concentrations of this pigment at the bottom of the euphotic zone. It is estimated that the presence of chl b could cause an average overestimation of phaeopigment concentration by the fluorometric technique of 38% between 0 and 200 m in the central North Pacific. This effect is more pronounced at the layer of chl b maximum (120-140 m). Scripps Inst. of Oceanogr., La Jolla, CA 92093, USA.
EIO0. Nekton
(communities; also fish, reptiles, m a m m a l s )
87:5148 Ailing, Abigail, 1986. Records of odontocetes in the northern Indian Ocean (1981-1982) and off the coast of Sri Lanka (1982-1984). J. Bombay nat. Hist. Soc., 83(2):376-394. School of Forestry and Environ. Studies, 205 Prospect St., New Haven, CT 06511, USA. 87:5149 Kenney, R.D. and H.E. Winn, 1987. Cetacean biomuss densities near submarine canyons compared to adjacent shelf/slope areas. Continent. Shelf Res., 7(2): 107-I 14.
775
Cetacean biomass estimates for NE U.S. canyon and neighboring shelf/slope areas were compared. Contrary to expectations, analysis demonstrated significantly lower total cetacean biomass in the canyon areas. When species were analyzed individually, only spotted dolphins (Stenella spp.) showed a significant difference, with higher densities near the canyons. The canyons are apparently not more important as a cetacean habitat than the shelf break region generally. Grad. School of Oceanogr., Univ. of Rhode Island, Narragansett, RI 02882-1197, USA.
ELI0. Bottom communities 87:5150 Boesch, D.F., Zhican Tang, Fengshan Xu and K.J. Nilsen, 1986. Macrobenthos and biogenic structures in sediments of the East China Sea continental shelf. Stud. mar. sin., 27:187-197. (In Chinese, English abstract.) This article presents results from joint China-U.S. investigations of the sediment dynamics of the East China Sea. Generalized distribution patterns of benthos are briefly described; however, particular emphasis is placed on observations of the vertical distribution of macrobenthos in the sediment column and the role of benthic organisms in sedimentary processes. Louisiana Univ. Mar. Consortium, USA. 87:5151 Bouchon, Claude and Jacques Laborel, 1986. Coral reefs of Martinique Island. Annls Inst. oc~anogr., Paris, 62(2):199-237. (In French, English abstract.) Lab. de Biol. Animale, BP 592 Univ. Antilles-Guyane, 97167 Pointe-a-Pitre, Guadeloupe. 87:5152 Fletcher, W.J., 1987. Interactions among subtidal Australian sea urchins, gastropods, and algae. Effects of experimental removals. Ecol. Monogr., 57(1):89-109. In a series of orthogonal removal experiments conducted at two different Cape Banks sites (New South Wales, Australia) at two different times, sea urchins were shown to be necessary for the maintenance of the encrusting coralline algae cover, with foliose algae rapidly replacing crustose algae in their absence. Limpet populations (3 spp.), which were themselves altered by urchin removal, had a less drastic, but important, impact on the algae. Removals of two species of turbinid gastropods had no significant effect. A.C.I.A.R. Coconut Crab Project, P.O. Box 211, Santo, Republic of Vanuatu, South Pacific. (gsb)
E. Biological Oceanography
A model takes as its structural unit the single cell, using Spudich and Sager's transition point hypothesis for the coupling between received light and cell cycle progression. The model predicts that the characteristics of cell division patterns in populations entrained by photocycles depends mainly on the position of the transition point within the cell cycle, rather than on the characteristics of the photocyclic regime. The model can be used to predict division patterns in high frequency photocycles and during transients induced by shifts in light regime. Chisholm: Ralph M. Parsons Lab. 48-425, MIT, Cambridge, MA 02139, USA. 87:5147 Vernet, Maria and C.J. Lorenzen, 1987. The presence of chlorophyll b and the estimation of phaeopigments in marine phytoplankton. J. Plankt. Res., 9(2):255-265. A reverse-phase h.p.l.c, technique was used to estimate the concentration of chl b in phytoplankton cultures, fecal pellets of Calanus pacificus, and suspended particulate matter from the central North Pacific, Oregon coastal waters, and Dabob Bay (a temperate fjord in Puget Sound, Washington). Zooplankton fecal pellets showed significant chl b enrichment, suggesting grazing as a mechanism to explain high concentrations of this pigment at the bottom of the euphotic zone. It is estimated that the presence of chl b could cause an average overestimation of phaeopigment concentration by the fluorometric technique of 38% between 0 and 200 m in the central North Pacific. This effect is more pronounced at the layer of chl b maximum (120-140 m). Scripps Inst. of Oceanogr., La Jolla, CA 92093, USA.
EIO0. Nekton
(communities; also fish, reptiles, m a m m a l s )
87:5148 Ailing, Abigail, 1986. Records of odontocetes in the northern Indian Ocean (1981-1982) and off the coast of Sri Lanka (1982-1984). J. Bombay nat. Hist. Soc., 83(2):376-394. School of Forestry and Environ. Studies, 205 Prospect St., New Haven, CT 06511, USA. 87:5149 Kenney, R.D. and H.E. Winn, 1987. Cetacean biomuss densities near submarine canyons compared to adjacent shelf/slope areas. Continent. Shelf Res., 7(2): 107-I 14.
775
Cetacean biomass estimates for NE U.S. canyon and neighboring shelf/slope areas were compared. Contrary to expectations, analysis demonstrated significantly lower total cetacean biomass in the canyon areas. When species were analyzed individually, only spotted dolphins (Stenella spp.) showed a significant difference, with higher densities near the canyons. The canyons are apparently not more important as a cetacean habitat than the shelf break region generally. Grad. School of Oceanogr., Univ. of Rhode Island, Narragansett, RI 02882-1197, USA.
ELI0. Bottom communities 87:5150 Boesch, D.F., Zhican Tang, Fengshan Xu and K.J. Nilsen, 1986. Macrobenthos and biogenic structures in sediments of the East China Sea continental shelf. Stud. mar. sin., 27:187-197. (In Chinese, English abstract.) This article presents results from joint China-U.S. investigations of the sediment dynamics of the East China Sea. Generalized distribution patterns of benthos are briefly described; however, particular emphasis is placed on observations of the vertical distribution of macrobenthos in the sediment column and the role of benthic organisms in sedimentary processes. Louisiana Univ. Mar. Consortium, USA. 87:5151 Bouchon, Claude and Jacques Laborel, 1986. Coral reefs of Martinique Island. Annls Inst. oc~anogr., Paris, 62(2):199-237. (In French, English abstract.) Lab. de Biol. Animale, BP 592 Univ. Antilles-Guyane, 97167 Pointe-a-Pitre, Guadeloupe. 87:5152 Fletcher, W.J., 1987. Interactions among subtidal Australian sea urchins, gastropods, and algae. Effects of experimental removals. Ecol. Monogr., 57(1):89-109. In a series of orthogonal removal experiments conducted at two different Cape Banks sites (New South Wales, Australia) at two different times, sea urchins were shown to be necessary for the maintenance of the encrusting coralline algae cover, with foliose algae rapidly replacing crustose algae in their absence. Limpet populations (3 spp.), which were themselves altered by urchin removal, had a less drastic, but important, impact on the algae. Removals of two species of turbinid gastropods had no significant effect. A.C.I.A.R. Coconut Crab Project, P.O. Box 211, Santo, Republic of Vanuatu, South Pacific. (gsb)