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Comparative study of crustacean larval photoresponses
OLR (1987)34 (12)
E. BiologicalOceanography
D o threshold is discussed, and it is suggested that a threshold concentration of sterols or other essential substances accumulated from food sets the PRS and thus initiates potentially autonomous development through the premoult stages of the moulting cycle. Biol. Anstalt Helgoland, Meeresstation, 2192 Helgoland, FRG. 87:7014 Ayukai, T., 1987. Discriminate feeding of the calanoid copeped Acarffa claml in mixtures of phytoplankton and inert particles. Mar. Biol., 94(4): 579-587. Adult female A. clausi were allowed to feed in the laboratory on the small green alga Dunaliella tertiolecta (5.6 /tin ESD), the diatoms Thalassiosira decipiens (13.4 pxn ESD) and T. nordenskioldii (17.7 /~m ESD), singly or in mixtures with polystyrene beads (15.7/tin ESD). The results suggest that beads are ingested by chance in feeding bouts on T. nordenskioldii. The bead interference on the ingestion rate on cells was observed in the experiments with D. tertiolecta and T. decipiens, but not with T. nordeaskioldii. The possible effects of body size and hunger on the discriminate feeding of copepods are discussed. Faculty of Agric., Toboku Univ., Sendal, Miyagi Prefecture, 980, Japan. 87:7015 Ayukai, Tenshi, 1987. Rate of filtering of fecal pellets by A c a r ~ omorff (Copepoda; Calanoida). J. oceanogr. Soc. Japan, 42(6):487-489. Faculty of Agric., Tohoku Univ., Sendal, 980, Japan. 87:7016 Bellantoni, D.C. and W.T. Peterson, 1987. Temporal variability in egg production rates of Acart/a tonsa Dana in Long Island Sound. J. expl mar. Biol. Ecol., 107(3):199-208. Mar. Sci. Res. Center, SUNY, Stony Brook, NY 11794-5000, USA. 8"/:7017 Brossi-Garcia, A.L., 1987. Moq~aology of the larval stages of CHbamuffus s ~ a r i m (Herbst, 1796)
(Deeapeda, Diogonidae) reared in the laboratory. Crustaceana, 52(3):251-275. Dept. de Zool., Inst. de Biociencias, UNESP, C.P. 178, Rio Claro, S. Paulo, Brasil. 87:7018
Elner, R.W. and Alan Campbell, 1987. Natural diets of lobster Homarm ~ m from barren ground and macroaigal habitats off southwestern Nova Scotia, Canada. Mar. Ecol.-Prog. Ser., 37(2-3): 131-140.
1073
Stomach contents of 1032 lobsters from an area with dense macroalgae and sea urchin-denuded barrens were examined. Gross dietary compositions and mean stomach fullness appeared similar; the diet spectrum encompassed a broad range of plants and animals but was dominated by molluscan, crustacean, echinoderm, and polychaete remains. Mussels were the most consistently identified prey species. Dietary diversity was significantly less for lobsters collected on barrens than from the macroalgal area. Temporal variations in diet were investigated; there were significant decreases in mean stomach fullness and mean number of prey taxa types per stomach for lobsters collected in summer vs winter. Data did not support the hypothesis that lobsters are a principal predator on sea urchins and there is still insufficient evidence to assess whether lobster production is food-limited on barrens. Dept. of Fish. and Oceans, Halifax Fish. Res. Lab., P.O. Box 550, Halifax, NS B3J 2S7, Canada. 87:7019 Forward, R.B. Jr., 1987. Comparative study of crustacean larval photorespenses. Mar. Biol., 94(4):589-595. Ovigerous females of four brachyuran and two anomuran species, which live as adults in coastal areas, were collected near Friday Harbor, Washington, and spectral sensitivity and phototactic pattern of their larvae were measured. Responses were compared with previous measurements on estuarine species to determine whether responsiveness varies with adult habitat. Estuarine and coastal species have similar photoresponses. Spectral sensitivity is adapted to daytime light conditions in the adult environment, and available spectra at the time of larval movement during diel vertical migration. Duke Univ. Mar. Lab., Beaufort, NC 28516, USA. 87:7020 Lazo-Wasem, E.A. and M.F. Gable, 1987. A review of recently discovered type specimens of Bermuda Amphipoda (Crustacea: Peracarida) described by B.W. Kunkel (1882-1969). Proc. biol. Soc. Wash., 1(X3(2):321-336. Die. of Invertebrate Zool., Peabody Mus. of Nat. History, Yale Univ., P.O. Box 6666, New Haven, CT 06511, USA. 87:7021 Manning, R.B., 1987. Notes on [nomendatm~ ofl western Atlantic camanessidae (Crustacea: Decapeda: Thalassirddea). Proc. biol. Soc. Wash., 100(2):386-401. Dept. of Invertebrate Zool., Natl. Mus. of Nat. History, Smithsonian Inst., Washington, DC 20560, USA.
E. BiologicalOceanography
D o threshold is discussed, and it is suggested that a threshold concentration of sterols or other essential substances accumulated from food sets the PRS and thus initiates potentially autonomous development through the premoult stages of the moulting cycle. Biol. Anstalt Helgoland, Meeresstation, 2192 Helgoland, FRG. 87:7014 Ayukai, T., 1987. Discriminate feeding of the calanoid copeped Acarffa claml in mixtures of phytoplankton and inert particles. Mar. Biol., 94(4): 579-587. Adult female A. clausi were allowed to feed in the laboratory on the small green alga Dunaliella tertiolecta (5.6 /tin ESD), the diatoms Thalassiosira decipiens (13.4 pxn ESD) and T. nordenskioldii (17.7 /~m ESD), singly or in mixtures with polystyrene beads (15.7/tin ESD). The results suggest that beads are ingested by chance in feeding bouts on T. nordenskioldii. The bead interference on the ingestion rate on cells was observed in the experiments with D. tertiolecta and T. decipiens, but not with T. nordeaskioldii. The possible effects of body size and hunger on the discriminate feeding of copepods are discussed. Faculty of Agric., Toboku Univ., Sendal, Miyagi Prefecture, 980, Japan. 87:7015 Ayukai, Tenshi, 1987. Rate of filtering of fecal pellets by A c a r ~ omorff (Copepoda; Calanoida). J. oceanogr. Soc. Japan, 42(6):487-489. Faculty of Agric., Tohoku Univ., Sendal, 980, Japan. 87:7016 Bellantoni, D.C. and W.T. Peterson, 1987. Temporal variability in egg production rates of Acart/a tonsa Dana in Long Island Sound. J. expl mar. Biol. Ecol., 107(3):199-208. Mar. Sci. Res. Center, SUNY, Stony Brook, NY 11794-5000, USA. 8"/:7017 Brossi-Garcia, A.L., 1987. Moq~aology of the larval stages of CHbamuffus s ~ a r i m (Herbst, 1796)
(Deeapeda, Diogonidae) reared in the laboratory. Crustaceana, 52(3):251-275. Dept. de Zool., Inst. de Biociencias, UNESP, C.P. 178, Rio Claro, S. Paulo, Brasil. 87:7018
Elner, R.W. and Alan Campbell, 1987. Natural diets of lobster Homarm ~ m from barren ground and macroaigal habitats off southwestern Nova Scotia, Canada. Mar. Ecol.-Prog. Ser., 37(2-3): 131-140.
1073
Stomach contents of 1032 lobsters from an area with dense macroalgae and sea urchin-denuded barrens were examined. Gross dietary compositions and mean stomach fullness appeared similar; the diet spectrum encompassed a broad range of plants and animals but was dominated by molluscan, crustacean, echinoderm, and polychaete remains. Mussels were the most consistently identified prey species. Dietary diversity was significantly less for lobsters collected on barrens than from the macroalgal area. Temporal variations in diet were investigated; there were significant decreases in mean stomach fullness and mean number of prey taxa types per stomach for lobsters collected in summer vs winter. Data did not support the hypothesis that lobsters are a principal predator on sea urchins and there is still insufficient evidence to assess whether lobster production is food-limited on barrens. Dept. of Fish. and Oceans, Halifax Fish. Res. Lab., P.O. Box 550, Halifax, NS B3J 2S7, Canada. 87:7019 Forward, R.B. Jr., 1987. Comparative study of crustacean larval photorespenses. Mar. Biol., 94(4):589-595. Ovigerous females of four brachyuran and two anomuran species, which live as adults in coastal areas, were collected near Friday Harbor, Washington, and spectral sensitivity and phototactic pattern of their larvae were measured. Responses were compared with previous measurements on estuarine species to determine whether responsiveness varies with adult habitat. Estuarine and coastal species have similar photoresponses. Spectral sensitivity is adapted to daytime light conditions in the adult environment, and available spectra at the time of larval movement during diel vertical migration. Duke Univ. Mar. Lab., Beaufort, NC 28516, USA. 87:7020 Lazo-Wasem, E.A. and M.F. Gable, 1987. A review of recently discovered type specimens of Bermuda Amphipoda (Crustacea: Peracarida) described by B.W. Kunkel (1882-1969). Proc. biol. Soc. Wash., 1(X3(2):321-336. Die. of Invertebrate Zool., Peabody Mus. of Nat. History, Yale Univ., P.O. Box 6666, New Haven, CT 06511, USA. 87:7021 Manning, R.B., 1987. Notes on [nomendatm~ ofl western Atlantic camanessidae (Crustacea: Decapeda: Thalassirddea). Proc. biol. Soc. Wash., 100(2):386-401. Dept. of Invertebrate Zool., Natl. Mus. of Nat. History, Smithsonian Inst., Washington, DC 20560, USA.