Determining the form of key predator-prey relationships is critical for understanding marine ecosystem dynamics. Using a comprehensive global database, we quantified effect fluctuations in food abundance on seabird breeding success. We identified threshold prey (fish and krill, termed "forage fish") below which seabirds experience consistently reduced more variable productivity. This response was common to all seven ecosystems 14 bird species examined within Atlantic, Pacific, Southern...

Primary production must constrain the amount of fish and invertebrates available to expanding fisheries; however degree limitation has only been demonstrated at regional scales date. Here we show that phytoplanktonic primary production, estimated from an ocean-colour satellite (SeaWiFS), is related global fisheries catches scale Large Marine Ecosystems, while accounting for temperature ecological factors such as ecosystem size type, species richness, animal body size, nature exploitation....

Trophic levels are critical for synthesizing species' diets, depicting energy pathways, understanding food web dynamics and ecosystem functioning, monitoring health. Specifically, trophic describe the position of species in a web, from primary producers to apex predators (range, 1-5). Small differences level can reflect large diet. Although among most basic information collected animals ecosystems, human (HTL) has never been defined. Here, we find global HTL 2.21, i.e., anchoveta. This value...

Abstract European eel decline is now widely observed and involves a large number of factors such as overfishing, pollution, habitat loss, dam construction, river obstruction, parasitism environmental changes. In the present study, we analyzed influence conditions in Sargasso Sea Atlantic ocean circulation on glass recruitment success. Over recent 11‐yr period, showed strong positive correlation between an original index primary production (PP) spawning area. Moreover, PP was negatively...

Abstract Coastal zones are productive areas that serve as nursery grounds for a large number of marine species. However, the processes involved in survival success during juvenile phase not well‐known. Some authors suggest availability prey is important to support production pre‐recruit fish whose fitness enhanced through optimal feeding conditions. Accordingly, recruitment limited by carrying capacity habitat. In contrast, other state fully exploited, suggesting there no effect food...

Abstract Chassot, E., Bonhommeau, S., Reygondeau, G., Nieto, K., Polovina, J. J., Huret, M., Dulvy, N. and Demarcq, H. 2011. Satellite remote sensing for an ecosystem approach to fisheries management. – ICES Journal of Marine Science, 68: 651–666. (SRS) the marine environment has become instrumental in ecology environmental monitoring impact assessment, it is a promising tool conservation issues. In context management (EAFM), global, daily, systematic, high-resolution images obtained from...

MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 529:219-231 (2015) - DOI: https://doi.org/10.3354/meps11275 Influence of environmental variability and age on body condition small pelagic fish in Gulf Lions Pablo Brosset1,2,*, Frédéric Ménard3, Jean-Marc Fromentin2, Sylvain Bonhommeau2, Caroline Ulses4, Jean-Hervé Bourdeix2, Jean-Louis Bigot2, Elisabeth Van...

MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 373:71-80 (2008) - DOI: https://doi.org/10.3354/meps07696 Impact of climate on eel populations Northern Hemisphere Sylvain Bonhommeau1,*, Emmanuel Chassot2, Benjamin Planque3, Etienne Rivot1, Anthony H. Knap4, Olivier Le Pape1 1Agrocampus-Ouest, Fisheries and Aquatic Sciences Center, CS 84 215, 35 042 Rennes...

FIGURE 2. Percentage of times where low (A) or high (B) recruitment is associated with spawning stock biomass (left boxplot).This percentage compared to random distribution (right boxplot)."Low" (R) (SSB) are assumed be lower when R SSB than the 20% quantile."High" higher greater 80% quantile.TABLE 1. Akaike Information Criterion (AIC; , 1974) for two parametric models (Beverton and Holt, 1957;Ricker, 1954).The bold numbers lowest AIC values, indicating better fit. DataBeverton Holt model...

Abstract Oceanic larvae of the European ( Anguilla anguilla ) and American A. rostrata eels have to cross Atlantic Ocean from Sargasso Sea or North coasts before entering continental habitats. In some rivers, eel recruitment is now <1% levels in 1980s. A better understanding effects anthropogenic pressures environmental fluctuations on subsequent a prerequisite build efficient management plans. The present paper provides insight into critical oceanic phase life cycle with focus duration...

Abstract Atlantic bluefin tuna ( ABFT ) has always displayed spectacular changes in its spatial distribution, but the underlying mechanism of such variations still remains obscure. This study focuses on this challenging issue by scrutinizing intriguing ‘Brazilian episode’ during which a large quantity (a temperate species) was caught 1960s equatorial Atlantic. To investigate event, we applied niche model to an extensive data set catch and environmental variables from 1960 2009. exhibited...

Abstract Since 2007, the biomass of sardine and anchovy in NW Mediterranean has remained persistently low, whereas commercially low-valued sprat exploded. Also, simultaneous decreases condition, size, and/or age these populations were observed. Altogether, this resulted a drop landings small pelagics. To understand amplitude events to provide baseline scenario against which current changes can be compared, we compiled exceptionally long landing series (1865–2013) sardine, anchovy, mackerel...

Drift gillnets are commonly used in the Indian Ocean to catch tuna, where bycatch is estimated be hundreds of thousands each year. In this region, drift typically set by poorly documented vessels responsible for very high levels cetacean bycatch, despite United Nations banning gear on seas 1992. Effort fishery not and both largely underreported Tuna Commission (IOTC), fisheries management organization that manages tuna region. Here we tested several novel approaches better document, monitor,...

Using Lagrangian simulations, based on circulation models over three different hydroclimatic periods in the last 45 years North Atlantic Ocean, trans-Atlantic migration of European eel Anguilla anguilla leptocephali was simulated via passive drift particles released spawning area. Three behaviours were modelled: drifting at fixed depth, undergoing a vertical or choosing fastest currents. Simulations included mortality hypotheses to estimate realistic mean duration and relative survival A....

Abstract The migration duration of European eel ( Anguilla anguilla ) larvae (leptocephali) from the spawning areas in Sargasso Sea to continental shelf remains highly controversial, with estimates varying 6 months more than 2 yr. We estimated fastest period and shortest distance travelled by simulating Lagrangian particles released a range larval behaviours (fixed‐depth drift, vertical diurnal active‐depth selection maximize current velocity). This enabled us compute (i) passive drift...

Bioluminescence, the light emitted naturally by marine organisms, is main source in mesopelagic zone. Nearly 75% of from surface to deep sea, use this capability for communication with diverse ecological goals (predation, repulsion...). Bioluminescence detection thus offers an indirect way tracking presence, distribution and migrations organisms (ranging zooplankton, dinoflagellates fishes). Such can lead example a better understanding vertical consequently quantification active carbon...

Bioluminescence, the light emitted naturally by marine organisms, is main source in mesopelagic zone. Nearly 75% of from surface to deep sea, use this capability for communication with diverse ecological goals (predation, repulsion...). Bioluminescence detection thus offers an indirect way tracking presence, distribution and migrations organisms. Such can lead example a better understanding vertical organisms consequently quantification active carbon export ocean. However, current...

MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 447:151-164 (2012) - DOI: https://doi.org/10.3354/meps09492 Reconstructing individual food and growth histories from biogenic carbonates Laure Pecquerie1,2,*, Ronan Fablet3,4, Hélène de Pontual5, Sylvain Bonhommeau6, Marianne Alunno-Bruscia7, Pierre Petitgas8, Sebastiaan A. L. M. Kooijman9 1University of...