Abstract A long-term study on the maturity cycle of Antarctic krill was conducted in a research a... more Abstract A long-term study on the maturity cycle of Antarctic krill was conducted in a research aquarium. Antarctic krill were either kept individually or in groups for 8 months under different temperature and food conditions, and the succession of female maturity stages and ...
Deep Sea Research Part II: Topical Studies in Oceanography, 2010
Krill growth and physiological condition were measured during the Baseline Research on Oceanograp... more Krill growth and physiological condition were measured during the Baseline Research on Oceanography, Krill and the Environment - West (BROKE-West) large-scale survey of the Western Indian Ocean sector (30-80 °E) of the Southern Ocean. Krill growth and condition were related to sea-surface temperature (SST) and Chlorophyll a levels. Estimates of Antarctic krill growth were obtained using the Instantaneous Growth Rate
Antarctic krill are subject to precautionary catch limits, based on biomass estimates, to ensure ... more Antarctic krill are subject to precautionary catch limits, based on biomass estimates, to ensure human activities do not adversely impact their important ecological role. Accurate target strength models of individual krill underpin biomass estimates. These models are scaled using measured and estimated distributions of length and orientation. However, while the length distribution of a krill swarm is accessible from net samples, there is currently limited consensus on the method for estimating krill orientation distribution. This leads to a limiting factor in biomass calculations. In this work, we consider geometric shape as a variable in target strength calculations and describe a practical method for generating a catalog of krill shapes. A catalog of shapes produces a more variable target strength response than an equivalent population of a scaled generic shape. Furthermore, using a shape catalog has the greatest impact on backscattering cross-section (linearized target strength) ...
Deep Sea Research Part II: Topical Studies in Oceanography, 2010
Krill growth and physiological condition were measured during the Baseline Research on Oceanograp... more Krill growth and physiological condition were measured during the Baseline Research on Oceanography, Krill and the Environment - West (BROKE-West) large-scale survey of the Western Indian Ocean sector (30-80 °E) of the Southern Ocean. Krill growth and condition were related to sea-surface temperature (SST) and Chlorophyll a levels. Estimates of Antarctic krill growth were obtained using the Instantaneous Growth Rate
Marine and Freshwater Behaviour and Physiology, 2003
Krill in captivity endure spatial restrictions, regardless of the size or shape of tank used. Vis... more Krill in captivity endure spatial restrictions, regardless of the size or shape of tank used. Visual inspection of freshly caught and captive animals suggests that their appendages, particularly the antennae and antennules, are often subject to injury. We have developed a novel ...
Marine and Freshwater Behaviour and Physiology, 2002
Crayfish tailflips have been intensively studied to reveal the decision-making processes and neur... more Crayfish tailflips have been intensively studied to reveal the decision-making processes and neural organisation underlying a stereotyped escape behaviour. Three behaviours mediated by different neural pathways have been well described: medial giant, lateral ...
Abstract A long-term study on the maturity cycle of Antarctic krill was conducted in a research a... more Abstract A long-term study on the maturity cycle of Antarctic krill was conducted in a research aquarium. Antarctic krill were either kept individually or in groups for 8 months under different temperature and food conditions, and the succession of female maturity stages and ...
Deep Sea Research Part II: Topical Studies in Oceanography, 2010
Krill growth and physiological condition were measured during the Baseline Research on Oceanograp... more Krill growth and physiological condition were measured during the Baseline Research on Oceanography, Krill and the Environment - West (BROKE-West) large-scale survey of the Western Indian Ocean sector (30-80 °E) of the Southern Ocean. Krill growth and condition were related to sea-surface temperature (SST) and Chlorophyll a levels. Estimates of Antarctic krill growth were obtained using the Instantaneous Growth Rate
Antarctic krill are subject to precautionary catch limits, based on biomass estimates, to ensure ... more Antarctic krill are subject to precautionary catch limits, based on biomass estimates, to ensure human activities do not adversely impact their important ecological role. Accurate target strength models of individual krill underpin biomass estimates. These models are scaled using measured and estimated distributions of length and orientation. However, while the length distribution of a krill swarm is accessible from net samples, there is currently limited consensus on the method for estimating krill orientation distribution. This leads to a limiting factor in biomass calculations. In this work, we consider geometric shape as a variable in target strength calculations and describe a practical method for generating a catalog of krill shapes. A catalog of shapes produces a more variable target strength response than an equivalent population of a scaled generic shape. Furthermore, using a shape catalog has the greatest impact on backscattering cross-section (linearized target strength) ...
Deep Sea Research Part II: Topical Studies in Oceanography, 2010
Krill growth and physiological condition were measured during the Baseline Research on Oceanograp... more Krill growth and physiological condition were measured during the Baseline Research on Oceanography, Krill and the Environment - West (BROKE-West) large-scale survey of the Western Indian Ocean sector (30-80 °E) of the Southern Ocean. Krill growth and condition were related to sea-surface temperature (SST) and Chlorophyll a levels. Estimates of Antarctic krill growth were obtained using the Instantaneous Growth Rate
Marine and Freshwater Behaviour and Physiology, 2003
Krill in captivity endure spatial restrictions, regardless of the size or shape of tank used. Vis... more Krill in captivity endure spatial restrictions, regardless of the size or shape of tank used. Visual inspection of freshly caught and captive animals suggests that their appendages, particularly the antennae and antennules, are often subject to injury. We have developed a novel ...
Marine and Freshwater Behaviour and Physiology, 2002
Crayfish tailflips have been intensively studied to reveal the decision-making processes and neur... more Crayfish tailflips have been intensively studied to reveal the decision-making processes and neural organisation underlying a stereotyped escape behaviour. Three behaviours mediated by different neural pathways have been well described: medial giant, lateral ...
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