Trophic ecology of three sympatric batoid species (Dasyatis pastinaca, Raja clavata, and Raja maderensis) from the Azores, NE Atlantic

Fontaine, Paco; Barreiros, João P.; Jaquemet, Sébastien

doi:10.1007/s10641-023-01412-2

Environ Biol Fish

2023

DOI: 10.1007/s10641-023-01412-2

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Trophic ecology of three sympatric batoid species (Dasyatis pastinaca, Raja clavata, and Raja maderensis) from the Azores, NE Atlantic

Paco Fontaine

João P. Barreiros

Sébastien Jaquemet

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Trophic assessment of three sympatric batoid species in the Southern Gulf of California

Enríquez-García,

Cruz-Escalona,

Carriquiry

et al. 2023

PeerJ

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The competitive exclusion principle establishes that the coexistence of closely related species requires a certain degree of resource partitioning. However, populations have individuals with different morphological or behavioral traits (e.g., maturity stages, sexes, temporal or spatial segregation). This interaction often results in a multi-level differentiation in food preferences and habits. We explored such resource partitioning between and within three batoid species: Hypanus dipterurus, Narcine entemedor, and Rhinoptera steindachneri in the southern Gulf of California, Mexico, using a combination of stomach content (excluding R. steindachneri) and stable isotope analyses. We found a clear differentiation between H. dipterurus and N. entemedor, where the latter exhibited more benthic habitats, supported by a greater association to infaunal prey and higher δ13C values. Though the degree and patterns of intra-specific segregation varied among species, there was a notable differentiation in both sex and stage of maturity, corresponding to changes in specialization (i.e., isotopic niche breadth) or trophic spectrum (varying prey importance and isotopic values per group). This work is a promising step towards understanding the dietary niche dynamics of these species in a potentially important feeding area within the southern Gulf of California, as well as the biological and ecological mechanisms that facilitate their coexistence.

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Trophic assessment of three sympatric batoid species in the Southern Gulf of California

Enríquez-García,

Cruz-Escalona,

Carriquiry

et al. 2023

PeerJ

View full text Add to dashboard Cite

show abstract

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Trophic ecology of three sympatric batoid species (Dasyatis pastinaca, Raja clavata, and Raja maderensis) from the Azores, NE Atlantic

Cited by 1 publication

References 69 publications

Trophic assessment of three sympatric batoid species in the Southern Gulf of California

Trophic assessment of three sympatric batoid species in the Southern Gulf of California

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