MESOPP

Mesopelagic Southern Ocean Prey and Predators

MESOPP project activities completed

The MESOPP project completed its activities in May 2019 after three years of fruitful coordinated research between partners in Europe and Australia. This website will remain active as a repository of documents and information on the project MESOPP but will not be regularly updated after September 2019. The roadmap document with a summary of recommendations […]

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Understanding the capacity for acoustics to detect and monitor lanternfish in the Southern Ocean

Within the twilight zone of the ocean, 200-1000 m below sea level, there are potentially vast resources of fish. Echosounders are commonly used to estimate fish abundance, by transmitting pulses of sound of known frequency into the water column and measuring the amount of signal (acoustic backscatter) reflected back. Fish with gas filled swimbladders return strong […]

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The use of acoustics to characterise mid-trophic levels of the Southern Ocean pelagic ecosystem

By using acoustics consistently, marine trophic levels and organism abundance can be monitored, to see how they change over time facing climate change and fisheries. However, the first step to detect changes in components of a marine ecosystem or even further of a whole ecosystem, is to characterise these components (in this case the Mid […]

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Investigation of deep-scattering layers with an unmanned science vehicle (e.g. Saildrone)

It is conventional to use research and fishing vessels as ships of opportunity to collect acoustic data at basin scales throughout the oceans (e.g. http://imos.org.au/facilities/shipsofopportunity/bioacoustic/). Unfortunately this data can only be collected as part of other ship missions and will have both spatial and temporal limitations. Recently the development of unmanned science vehicles (USV) is […]

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Cetacean abundance in North-West Atlantic

A new “use case” from latest MESOPP Workshop about cetacean abundance modelling and micronekton in the North-West Atlantic area, from J. Roberts. See Mesopelagic Prey and Predators: cetacean abundance in North-West Atlantic

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Tracking a white shark in a mesoscale dynamic ocean

A new “use case” from latest MESOPP Workshop about shark and micronekton & acoustic data both in the North-West Atlantic area, from A. Della Penna and P. Gaube. See Mesopelagic Prey and Predators: tracking a white shark in a mesoscale dynamic ocean

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Reports from the three MESOPP workshops now available

The primary objective of MESOPP is to demonstrate the interest of establishing a common methodology and a connected network of databases of acoustic data for the estimation of micronekton biomass and validation of ocean ecosystem models. As part of the MESOPP project, one workshop per year was held.  The first workshop of the project (2016) […]

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King Penguins’ Predators & prey use case

An example of Southern Ocean predators’ tracks compared with micronekton biomass see king penguins’ Predators & prey use case

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MESOPP report on Acoustic data from vessels of opportunity published

The mesopelagic communities (macro-zooplankton and micronekton communities ~2 to 20 cm in length including small fish, crustaceans, squids and gelatinous organisms) living in the twilight zone of the ocean have been identified as one of the least investigated components of open ocean ecosystems. Mesopelagic communities are mid-water prey at 200–1000 m depth and based on […]

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MESOPP work session in Toulouse

Rowan Trebilco and David Green (U. Tasmania) are at CLS, in Toulouse, France, this week to work on MESOPP with Patrick Lehodey. They are looking at the acoustic data vs the micronekton Seapodym model outputs.

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