Zoeken
Zoeken kan via de modus 'eenvoudig zoeken' (één veld) of uitgebreid via 'geavanceerd zoeken' (meerdere velden). Zo kan je bv. zoeken op een combinatie van een auteursnaam (auteur), een jaartal (jaar) en een documenttype.
Boekenmand
Nuttige resultaten kan je aanvinken en toevoegen aan een mandje. De inhoud hiervan kan je exporteren of afdrukken (naar bv. PDF).
RSS
Op de hoogte blijven van nieuw toegevoegde publicaties binnen uw interessegebied? Dit kan door een RSS-feed (?) te maken van jouw zoekopdracht.
nieuwe zoekopdracht
Use of otolith shape and elemental signatures to infer the population structure of the thicklip grey mullet Chelon labrosus in the southern Bay of Biscay
Nzioka, A.; Cancio, I.; Diaz De Cerio, O.D.; Ortiz-Zarragoitia, M.; Pinto, E.; Almeida, A.; Correia, A.T. (2022). Use of otolith shape and elemental signatures to infer the population structure of the thicklip grey mullet Chelon labrosus in the southern Bay of Biscay. Biol. Life Sci. Forum 13(1): 71. https://dx.doi.org/10.3390/blsf2022013071
In: Biology and Life Sciences Forum. MDPI: Basel. e-ISSN 2673-9976
|   |
| Trefwoorden |
Otoliths
Population characteristics > Population structure
Scientific Publication
Chelon labrosus (Risso, 1827) [WoRMS]
Marien/Kust |
| Author keywords |
shape and elemental signatures |
| Auteurs | | Top |
- Nzioka, A.
- Cancio, I.
- Diaz De Cerio, O.D.
- Ortiz-Zarragoitia, M.
|
- Pinto, E.
- Almeida, A.
- Correia, A.T.
|
|
| Abstract |
Xenoestrogenic effects have been reported in thicklip grey mullet, Chelon labrosus, used as pollution sentinel organisms in estuaries in the Southeast Bay of Biscay with intersex gonads described in populations from some contaminated estuaries. Despite evidence of reproductive stress in this catadromous fish species, knowledge of mullet reproductive movements and connectivity between estuaries is lacking. This study investigates the population structure of C. labrosus using otolith shape and elemental signatures of 60 adult individuals collected from two estuaries found in the Southeast Bay of Biscay (Gernika and Plentzia). All samples were collected in June–July 2020. Otolith shape analysis was determined using elliptical Fourier descriptors, while elemental signatures (Sr:Ca, Li:Ca, Mg:Ca, Mn:Ca, Co:Ca, Ni:Ca, Cu:Ca and Ba:Ca) of whole sagittae were determined by inductively coupled plasma mass spectrophotometry. Both natural tags were analyzed with univariate and multivariate statistics to determine whether these signatures are geographically distinct and can be used to assess the degree of separation between individuals. The data showed significant differences in the otolith shape and elemental analyses, with canonical analysis of principal coordinates plots identifying two different groups, each one belonging to each estuary of origin. Differences in whole otolith elemental signatures between locations were driven by Sr:Ca, Li:Ca, and Ba:Ca. Sr:Ca and Li:Ca ratios were higher in Plentzia than in Gernika, while Ba:Ca was higher in Gernika. The high re-classification success rate using both tools obtained from stepwise linear discriminant function analysis supports these findings and suggests that Gernika and Plentzia individuals passed enough time in separated water compartments and should be regarded as two different population units. This could suggest that the intersex condition in mullets from Gernika is due to life-long exposure to xenoestrogens after homing during early larval development in that estuary, without migrations to other estuaries. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
