Acta Adriatica, Vol. 63 No. 2, 2022.
Izvorni znanstveni članak
https://doi.org/10.32582/aa.63.2.3
Ingression of the hydromedusa Neotima lucullana (delle chiaje, 1822) into the ecosystem of the Neretva river estuary (south-eastern Adriatic, Croatia
Davor Lučić
; Institut za more i priobalje, Sveučilište u Dubrovniku
Ivona Onofri
; Institut za more i priobalje, Sveučilište u Dubrovniku
Rade Garić
; Institut za more i priobalje, Sveučilište u Dubrovniku
Ivana Violić
; Sveučilište u Dubrovniku, Odjel primjenjene ekologije
Mijo Vranješ
; Sveučilište u Splitu, Fakultet građevinarstva, arhitekture i geodezije
Barbara Gangai Zovko
; Institut za more i priobalje, Sveučilište u Dubrovniku
Jure Jurinović
; Opuzen 20355, Podgradina 15, Croatia
Jakica Njire
; Institut za more i priobalje, Sveučilište u Dubrovniku
Marijana Hure
; Institut za more i priobalje, Sveučilište u Dubrovniku
Sažetak
Hydromedusa Neotima lucullana is an endemic species of the Mediterranean Sea. In this study
we document the first numerous and permanent occurrence of N. lucullana in the estuary of the
Neretva River, an unusual habitat for this typical marine species. We provide COI barcode sequence
of this species, which is also first genetic sequence ever published of N. lucullana. Weekly data on the
occurrence and abundance of N. lucullana were obtained from reports and records of autonomous
divers and local fishermen in the area from Opuzen to Metković from mid-June to the end of October
2021. The individuals were always located in the layer above the bottom with salinity between 35.2
and 38.2. The diameters of the jellyfish bells ranged from 15 mm to 72 mm, most of them between
40 mm and 58 mm. Differential development of the gonads was observed in all specimens larger
than 25 mm. In mid-June, the specimens were common but solitary. A week later, the jellyfish
were more frequent and in smaller aggregations. From late June to mid-September, the jellyfish
were constantly observed in larger aggregations. Toward the autumn, the number of individuals
gradually decreased, and by the last week of October, only single individuals were observed. Our
results indicate significant changes in the ecosystem of the Neretva estuary and confirm the observed
composition of zooplankton communities dominated by marine species in summer and autumn.
Ključne riječi
jellyfish; Eirenidae; zooplankton; karstic estuary ecosystem; Mediterranean Sea
Hrčak ID:
289601
URI
Datum izdavanja:
30.12.2022.
Posjeta: 479 *