Relationships between otolith and fish size from Mediterranean and north‐eastern Atlantic species to be used in predator–prey studies

Giménez, Joan; Manjabacas, Amalia; Tuset, Víctor M.; Lombarte, Antoni

doi:10.1111/jfb.13115

Cited by 28 publications

(22 citation statements)

References 29 publications

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“…Otolith morphometric measurements with the genus regressions were used successfully by Giménez, Manjabacas, Tuset & Lombarte (2016) when species identification is not possible. The findings of the current study are consistent with Giménez, Manjabacas, Tuset & Lombarte (2016) and the estimation of the regression within a genus level provided variances above 70%.…”

Section: Discussionsupporting

confidence: 89%

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Emre¹

2020

Turk. J. Fish. Aquat. Sci.

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The relationships between asteriscus otolith morphology (OL, OW, OR and OM) and fish total length were described with a non-linear function (power model) for seven Cyprinid fish species: Capoeta angorae, C. antalyensis, C. caelestis, C. erhani, C. pestai, Pseudophoxinus antalyae and P. fahrettini. These species are endemic to Turkey and have limited distributions. The regression models are quite well fitted with all asteriscus otolith measurements. We were also conducted the regression models for genus level. There was no significant difference between the size of the left and right otoliths (paired t-test) in any of the seven species. This is the first study that examines the relationships between asteriscus otolith morphology and fish total length for four Cyprinid species. These results showed that the equations generated to obtain the fish size using otolith morphology data can be used in dietary studies.

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Section: Discussionsupporting

confidence: 89%

Untitled

Emre¹

2020

Turk. J. Fish. Aquat. Sci.

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“…For otoliths/beaks identified only to genus, regressions based on combined data from the species in the group were used when available (Giménez et al . ). When otoliths were too eroded to allow reliable measurements or when there was no measurable structure available, the mean individual weight for that species in our sample set was used (MIW; i.e ., mean of all the estimated weights of a given prey species calculated from the remains in all the stomachs examined; McKinnon , Silva ).…”

Section: Methodsmentioning

confidence: 97%

“…, Giménez et al . ) and the reference collection of the Portuguese Wildlife Society, University of Minho held in the laboratory of Ria Formosa Natural Park in Olhão, Portugal.…”

Section: Methodsmentioning

confidence: 99%

Feeding ecology of Mediterranean common dolphins: The importance of mesopelagic fish in the diet of an endangered subpopulation

Giménez

Marçalo

García-Polo

et al. 2017

Marine Mammal Science

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The Mediterranean subpopulation of common dolphin (Delphinus delphis) is classified as endangered by the IUCN. Still, information about their diet in the Mediterranean is scarce. Stomach contents of 37 common dolphins stranded in the Alboran Sea and Strait of Gibraltar were analyzed. A total of 13,634 individual prey of 28 different taxa were identified. For fish, Myctophidae was the most important family as indicated by the highest index of relative importance (IRI = 8,470), followed by the family Sparidae (IRI = 609). The most important Myctophidae species was Madeira lantern fish (Ceratoscopelus maderensis) and for Sparids, the bogue (Boops boops). Cephalopods, instead, were found in low quantities only with 31 prey from the Loliginidae, Ommastrephidae, and Sepiolidae families. Overall, our results indicate that common dolphins are mainly piscivorous (99.77%N, 94.59%O, 99.73%W), feeding mostly on mesopelagic prey. Although common dolphins inhabit mainly coastal waters in the study area, the narrow continental shelf seems to facilitate the availability of Myctophids and other members of the mesopelagic assemblage to dolphins when the assemblage migrates to the surface at night. Our results represent the first attempt at quantifying the diet of this predator in the Alboran Sea and Strait of Gibraltar.

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“…Scianidae), the b values tended to negative allometry in most relationships, as species within families are relatively more similar in shape. Most studies providing relationships between otolith and fish size have used only the width and length of the otolith (Giménez et al 2016;Assis et al 2018;Park et al 2018).…”

Section: Discussionmentioning

confidence: 99%

Biometric relationships between body size and otolith size in 15 demersal marine fish species from the northern Brazilian coast

et al. 2019

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The relationships between fish size and sagitta otolith measurements were calculated for the first time for 15 species belonging to six families from the northern Brazilian coast. A total of 220 fish were sampled from the bycatch landed by the bottom-trawl industrial shrimp-fishing fleet between August and September 2016. All species had strong relationships between otolith measurements and fish total length with the coefficient of determination (r 2) ranging between 0.71 and 0.99. The variable most strongly related to fish total length was found to be the sagittal otolith length (OL) with 98% of the variability. These relationships are a useful tool to estimate length and mass of preyed fish from otoliths found in stomach contents of marine predators.

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Relationships between otolith and fish size from Mediterranean and north‐eastern Atlantic species to be used in predator–prey studies

Cited by 28 publications

References 29 publications

Untitled

Untitled

Feeding ecology of Mediterranean common dolphins: The importance of mesopelagic fish in the diet of an endangered subpopulation

Biometric relationships between body size and otolith size in 15 demersal marine fish species from the northern Brazilian coast

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