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Article
Open AccessAn evolution towards scientific consensus for a sustainable ocean future
The ocean has recently taken centre stage in the global geopolitical landscape. Despite rising challenges to the effectiveness of multilateralism, attention to ocean issues appears as an opportunity to co-crea...
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Article
Open AccessTrophic ecology, habitat, and migratory behaviour of the viperfish Chauliodus sloani reveal a key mesopelagic player
Mesopelagic fishes are numerically the most important vertebrate group of all world’s oceans. While these species are increasingly threatened by anthropogenic activities, basic biological knowledge is still la...
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Article
Catch and bycatch captured by tropical tuna purse-seine fishery in whale and whale shark associated sets: comparison with free school and FAD sets
In an ecosystem approach to fisheries management (EAFM) framework of the tuna purse-seine fishery, the assessment of target species, but also that of bycatch species, is essential. In the Atlantic and Indian o...
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Article
A global perspective on the trophic geography of sharks
Sharks are a diverse group of mobile predators that forage across varied spatial scales and have the potential to influence food web dynamics. The ecological consequences of recent declines in shark biomass ma...
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Article
Trophic structure in the northern Humboldt Current system: new perspectives from stable isotope analysis
The northern Humboldt Current system (NHCS) is the most productive eastern boundary upwelling system (EBUS) in terms of fish productivity despite having a moderate primary production compared with other EBUS. ...
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Article
Variations in the diet and stable isotope ratios during the ovarian development of female yellowfin tuna (Thunnus albacares) in the Western Indian Ocean
The feeding strategy of female yellowfin tuna (Thunnus albacares) during their reproductive cycle was investigated using a combination of different trophic tracers, i.e., stomach contents and dual stable isotope ...
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Article
Length and weight estimates from diagnostic hard part structures of fish, crustacea and cephalopods forage species in the western Indian Ocean
To estimate the original prey size of well-digested prey (fish, cephalopod and crustacean) of large pelagic fish predators representing 17 species in eight families (Scombridae, **phiidae, Istiophoridae, Caran...
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Article
The swimming crab Charybdis smithii: distribution, biology and trophic role in the pelagic ecosystem of the western Indian Ocean
Surface “swarms” of the swimming crabs Charybdis smithii are still considered as an unusual phenomenon in the open Indian Ocean, although their dense pelagic aggregations were already reported in waters off the I...
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Article
Wavelet analysis of ecological time series
Wavelet analysis is a powerful tool that is already in use throughout science and engineering. The versatility and attractiveness of the wavelet approach lie in its decomposition properties, principally its ti...
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Article
Variability in conspecific predation among longnose lancetfish Alepisaurus ferox in the western Indian Ocean
Conspecific predation among longnose lancetfish Alepisaurus ferox was investigated in four spatio-temporal strate of the western Indian Ocean. The cannibalism level varied from 0 to 45.5% by frequency of occurren...
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Article
Isotopic evidence of distinct feeding ecologies and movement patterns in two migratory predators (yellowfin tuna and swordfish) of the western Indian Ocean
Ecologists primarily use δ15N values to estimate the trophic level of organisms, while δ13C, and even recently δ15N, are utilized to delineate feeding habitats. However, many factors can influence the stable isot...
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Detecting Periodicity in Quantitative versus Semi-Quantitative Time Series
Ordered categorical (or semi-quantitative) data are frequently encountered in ecology (e.g., Steen et al. 1990; Ménard et al. 1993). Researchers often resort to semi-quantitative measures (to describe abundance p...
