Showing papers in "Journal of Experimental Marine Biology and Ecology in 1979"

TL;DR: An examination of the field data in the light of the laboratory selection experiments suggests that the presence of pinfish may to some degree, through an interaction with habitat complexity, determine the spatial distribution of amphipod abundance and diversity within eelgrass beds.

TL;DR: The upper and lower limits of vertical distribution (zonation) of these two species of barnacles are determined primarily by the settlement of cyprids.

TL;DR: It is shown that limiting nutrient patchiness can alter the relative abundance of populations within a community based on each population's ability to exploit the limiting resource under a particular degree of patchiness and coexistence of two populations might be expected due to the patchiness of a single limiting nutrient.

TL;DR: Geographical patterns of coral density banding based on the literature are discussed and a model is proposed relating the interplay of light availability and water temperature to the production of high and low density skeletal bands.

TL;DR: Transplantation was employed to determine how marine sponges grow in different in situ conditions of light and current, and significant morphological differences were observed in sponge grown under different environmental conditions.

TL;DR: It is suggested that phenotypic plasticity is an important species attribute in scieractinians and may be a significant mechanism in controlling the distribution and abundance of scleractinian on reefs.

TL;DR: Seasonal patterns in the amphipod assemblage studied are generally similar from year to year and are somewhat similar within a single year at two study sites located in different areas of the cstuarine system.

TL;DR: Although coral reefs are adapted to transient increases in turbidity, a continuous reduction in light penetration, for example after dredging, would severely alter community function and structure by decreasing photosynthesis, particularly in deeper reef zones where light is already limiting.

TL;DR: The shell utilization patterns of two intertidal populations of the hermit crab, Pagurus longicarpus Say, were studied and showed that individuals from the two areas had significantly different shell preferences.

TL;DR: Wild adults prey at significantly higher rates on nauplii of other species than on their conspecifics regardless of prey preconditioning and Naupliar size is also important; smaller sized prey are usually preferred.

TL;DR: It is proposed that the normal nutritional mode of the marine microflagellates tested is to ingest bacteria rather than dissolved organic matter or a combination thereof.

TL;DR: Calorific values of the ash-free dried soft parts of Macoma balthica, sampled monthly during 1 year at a tidal flat station in the Dutch Wadden Sea, have been estimated by two methods and it is concluded that biologically significant calorimetry cannot dispense with biochemical analysis.

TL;DR: Populations of the Manila clam, Tapes philippinarum, were maintained at temperatures of 12, 15, 18, and 21°C for a period of 19 weeks for estimation of dry meat weight, dry shell weight, biochemical composition, and gonadal development.

TL;DR: The saponins in eggs and larvae of A. planci are at levels detectable by, and unpalatable to, planktivorous fish and they account, at least in part, for the observed rejection of these early developmental stages by planktIVorous fish.

TL;DR: Results show that the best correlate of the dominant species of Uca in a particular habitat is the density of the root mat of that area, and variations in the abundance of large U. pugnax at two tide levels in a marsh very closely parallel the ability of U. minax to burrow in substrata taken from those same two areas of the marsh.

TL;DR: The model fails most dramatically in those experiments involving a rapid increase in cell quota, thereby demonstrating both the inherent flaws in the concept of the instantaneous growth rate as a function of instantaneous cell quota and the need for further dynamic characterization of phytoplankton behavior.

TL;DR: Potential phosphatase activity in the samples was found to be indicative of the extent and rate of decomposition of organic phosphorus in coastal waters, suggesting that this organic fraction is re-cycled in the primary production of the bays.

TL;DR: The data indicate that a sulfide detoxification system exists in the body wall which uses an as yet unknown scavenging system to trap much of the sulfide that enters, detoxifies it, and releases the end-product to the medium.

TL;DR: Between-habitat faunal changes in summer were primarily clinal, following a gradual change in sediment texture, and a strong correlation between the Shannon-Weaver diversity and sediment texture existed in summer, with diversity increasing due to decreasing species dominance and increasing species richness as sediments became coarser.

TL;DR: The temporal pattern of cell division in marine species of the dinoflagellate genus Ceratium was examined in a combined program of laboratory and field experiments and it was found that division was less synchronous and was initiated earlier in sexual life-history stages than it was in vegetable stages.

TL;DR: The scallop Chlamys varia (L.) was found associated with an enveloping epizoitic growth of the sponge Halichondria panicea (Pallas) and was protected against predatory starfishes by the sponge which interfered with the attachment of tube feet and made the vulnerable byssal opening and valve margins inaccessible to the predator's gastric membranes.

TL;DR: An energy budget is constructed for the larval development of the crab Rhithropanopeus harrisii (Gould) fed nauplii of the brine shrimp Artemia salina (L.) and the partitioning of energy is discussed in relation to other physiological studies on this species.

TL;DR: There was no significant difference in the O: N ratio for the first three larval stages but a reduction was observed in stage IV and V lobsters, reflecting an increased dependence on protein catabolism for energy.

TL;DR: Fatty acid composition was typically crustacean and fairly unsaturated, phospholipid fatty acids being more unsaturated than those from triacylglycerol; both fractions from eggs were relatively rich in monoenoic acids compared with those of adult shrimps.

TL;DR: The higher assimilation efficiency of males may be associated with increased retention of ingested food to allow for recovery of minerals lost during moulting, and it may also represent a mechanism ensuring that males grow to a greater length than females, which is a prerequisite for successful copulation.

TL;DR: Intraspecific hole defense by a wrasse prevents a delay in its retiring that would increase the risk of crepuscular predation on it, and does not have a higher mortality rate.

TL;DR: The results suggest that optimum in situ sites for rapid degradation of plant detritus in estuaries are the sediment-air and sediment-water interfaces.

TL;DR: The chemosensory ability of the Dungeness crab was measured with sea-water solutions of a freeze-dried extract of the littleneck clam and compared with those of other crustaceans.

TL;DR: It is suggested that variation in the duration of the planktonic larval phase and the number of larval instars may help to ensure the dispersal of sibling larvae and thus enhances the survival of the parental genotypes.

TL;DR: The oxygen consumption and heart rate of these two species are not directly coupled to regulation of water volume because different responses are observed with respect to salinity although there is poor water volume regulation in both species.