scholarly journals Non-size-selective predation on fish larvae by moon jellyfish Aurelia aurita under low oxygen concentrations

2008 ◽  
Vol 3 (Supplement) ◽  
pp. 114-117 ◽  
Author(s):  
Jun Shoji
Keyword(s):  
Fish Larvae ◽  
Aurelia Aurita ◽  
Low Oxygen ◽  
Selective Predation ◽  
Moon Jellyfish ◽  
Oxygen Concentrations

Withstanding multiple stressors: ephyrae of the moon jellyfish (Aurelia aurita, Scyphozoa) in a high-temperature, high-CO2 and low-oxygen environment

2016 ◽  
Vol 163 (9) ◽  
Author(s):  
María Algueró-Muñiz ◽  
Cédric L. Meunier ◽  
Sabine Holst ◽  
Santiago Alvarez-Fernandez ◽  
Maarten Boersma
Keyword(s):  
High Temperature ◽  
Multiple Stressors ◽  
Aurelia Aurita ◽  
The Moon ◽  
Low Oxygen ◽  
Moon Jellyfish ◽  
High Co2 ◽  
Oxygen Environment

Influence of temperature on size-dependent predation by a fish (Gasterosteus aculeatus) and a jellyfish (Aurelia aurita) on larval capelin (Mallotus villosus)

1997 ◽  
Vol 54 (12) ◽  
pp. 2759-2766 ◽  
Author(s):  
J K Elliott ◽  
W C Leggett
Keyword(s):  
Gasterosteus Aculeatus ◽  
Aurelia Aurita ◽  
Mallotus Villosus ◽  
Selective Predation ◽  
Moon Jellyfish ◽  
Predator Prey ◽  
Size Dependent ◽  
Capelin Mallotus Villosus ◽  
Different Temperatures ◽  
Influence Of Temperature On

We compared the size-dependent mortality patterns of newly emerged larval capelin (Mallotus villosus) at three different temperatures (3, 9, and 15°C) when exposed to predation by threespine stickleback (Gasterosteus aculeatus) and moon jellyfish (Aurelia aurita). Controlled experiments were conducted in both microcosms (38 L) and mesocosms (3100 L). Some temperature-related trends were evident in experiments with sticklebacks, but not with jellyfish. Sticklebacks fed selectively on smaller capelin larvae at 15°C, were nonselective at 9°C, and fed on larger larvae at 3°C. There was no prey size selection by A. aurita at any of the temperatures examined. Our findings support the view that the direction and magnitude of size-selective predation vary depending on the predator-prey assemblage and environmental conditions examined.

scholarly journals Shorter, warmer winters may inhibit production of ephyrae in a population of the moon jellyfish Aurelia aurita

Hydrobiologia ◽  
2020 ◽  
Author(s):  
Alexandra Loveridge ◽  
Cathy H. Lucas ◽  
Kylie A. Pitt
Keyword(s):  
Incubation Time ◽  
Life Stage ◽  
Aurelia Aurita ◽  
The Moon ◽  
Minimum Period ◽  
Moon Jellyfish ◽  
Winter Conditions ◽  
Scyphozoan Jellyfish ◽  
Significant Production ◽  
Planula Larvae

AbstractScyphozoan jellyfish blooms display high interannual variability in terms of timing of appearance and size of the bloom. To understand the causes of this variability, the conditions experienced by the polyps prior to the production of ephyrae in the spring were examined. Polyps reared from planula larvae of Aurelia aurita medusae collected from southern England (50°49′58.8; − 1°05′36.9) were incubated under orthogonal combinations of temperature (4, 7, 10 °C) and duration (2, 4, 6, 8 weeks), representing the range of winter conditions in that region, before experiencing an increase to 13 °C. Timing and success of strobilation were recorded. No significant production of ephyrae was observed in any of the 2- and 4-week incubations, or in any 10 °C incubation. Time to first ephyra release decreased with longer winter incubations, and more ephyrae were produced following longer and colder winter simulations. This experiment indicates that A. aurita requires a minimum period of cooler temperatures to strobilate, and contradicts claims that jellyfish populations will be more prevalent in warming oceans, specifically in the context of warmer winter conditions. Such investigations on population-specific ontogeny highlights the need to examine each life stage separately as well as in the context of its environment.

scholarly journals The Function of the Gills of Mayfly Nymphs from Different Habitats

1939 ◽  
Vol 16 (3) ◽  
pp. 363-373 ◽  
Author(s):  
C. A. WINGFIELD
Keyword(s):  
Oxygen Consumption ◽  
Oxygen Content ◽  
The Body ◽  
Gaseous Exchange ◽  
Low Oxygen ◽  
Respiratory Mechanism ◽  
Tracheal Gills ◽  
Cloeon Dipterum ◽  
Gill Function ◽  
Oxygen Concentrations

1. The oxygen consumption of normal and gill-less nymphs of the mayflies Baetis sp., Cloeon dipterum and Ephemera vulgata has been measured at various oxygen concentrations. 2. It has been found that over the complete range of oxygen concentrations studied, the tracheal gills do not aid oxygen consumption in Baetis sp. In Cloeon dipterum, at all oxygen concentrations tested, no gaseous exchange takes place through the gills; at low oxygen concentrations, however, the gills function as an accessory respiratory mechanism in ventilating the respiratory surface of the body and so aid oxygen consumption. In Ephemera Vulgata the gills aid oxygen consumption even at high oxygen concentrations. In this species the gills may function both as true respiratory organs and as a ventilating mechanism. 3. It is shown that the differences in gill function can be related to the oxygen content of the habitat of each species.

scholarly journals Isolation of Alcaligenes sp. strain L6 at low oxygen concentrations and degradation of 3-chlorobenzoate via a pathway not involving (chloro)catechols.

1996 ◽  
Vol 62 (7) ◽  
pp. 2427-2434 ◽  
Author(s):  
J Krooneman ◽  
E B Wieringa ◽  
E R Moore ◽  
J Gerritse ◽  
R A Prins ◽  
...  
Keyword(s):  
Low Oxygen ◽  
Oxygen Concentrations
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