Direct ageing of Thunnus thynnus from the eastern Atlantic Ocean and western Mediterranean Sea using dorsal fin spines

2014 ◽  
Vol 84 (6) ◽  
pp. 1876-1903 ◽  
Author(s):  
P. L. Luque ◽  
E. Rodriguez-Marin ◽  
J. Landa ◽  
M. Ruiz ◽  
P. Quelle ◽  
...  
Keyword(s):  
Atlantic Ocean ◽  
Mediterranean Sea ◽  
Western Mediterranean ◽  
Thunnus Thynnus ◽  
Dorsal Fin ◽  
Western Mediterranean Sea ◽  
Eastern Atlantic Ocean ◽  
Fin Spines

A review on the effects of alien rodents in the Balearic (Western Mediterranean Sea) and Canary Islands (Eastern Atlantic Ocean)

2008 ◽  
Vol 11 (7) ◽  
pp. 1653-1670 ◽  
Author(s):  
A. Traveset ◽  
M. Nogales ◽  
J. A. Alcover ◽  
J. D. Delgado ◽  
M. López-Darias ◽  
...  
Keyword(s):  
Atlantic Ocean ◽  
Mediterranean Sea ◽  
Canary Islands ◽  
Western Mediterranean ◽  
Western Mediterranean Sea ◽  
Eastern Atlantic Ocean

scholarly journals Ecology of the Atlantic black skipjack Euthynnus alletteratus (Osteichthyes: Scombridae) in the western Mediterranean Sea inferred by parasitological analysis

Parasitology ◽  
2016 ◽  
Vol 143 (10) ◽  
pp. 1330-1339 ◽  
Author(s):  
SALVATORE MELE ◽  
M. GRAZIA PENNINO ◽  
M. CRISTINA PIRAS ◽  
DAVID MACÍAS ◽  
M. JOSÉ GÓMEZ-VIVES ◽  
...  
Keyword(s):  
Atlantic Ocean ◽  
Mediterranean Sea ◽  
Western Mediterranean ◽  
Sea Surface ◽  
Small Scale ◽  
Interannual Variations ◽  
Western Atlantic ◽  
Parasite Abundance ◽  
Western Atlantic Ocean ◽  
Western Mediterranean Sea

SUMMARYBetween 2008 and 2011, the head of 150 Euthynnus alletteratus (Osteichthyes: Scombridae) caught inshore off the southeastern Iberian coast (western Mediterranean Sea) were examined for parasites. Two monogeneans, four didymozoid trematodes and four copepods were found. Parasite abundance showed a positive relationship with the annual sea surface temperature, except for Pseudocycnus appendiculatus, but negative with the sea depth (Capsala manteri, Neonematobothrium cf. kawakawa and Caligus bonito). Prevalences and mean abundances differed significantly among sampling areas, except for C. manteri, Oesophagocystis sp. 2 and Ceratocolax euthynni, and sampling years (Melanocystis cf. kawakawa, N.cf. kawakawa, P. appendiculatus and Unicolax collateralis). Results indicate that the parasite abundances of E. alletteratus in the western Mediterranean Sea depend mainly on regional environmental variables, which can show interannual variations. The presence of pelagic parasites, i.e. didymozoids and P. appendiculatus, could indicate that E. alletteratus migrates between inshore and offshore pelagic domains. The different parasite faunas reported in E. alletteratus populations from the western Atlantic Ocean and the Mediterranean Sea appear to point out the geographical host isolation. These results suggest that E. alletteratus inhabiting the western Mediterranean Sea performs inshore-offshore small-scale migrations, and not transoceanic migrations between the western Atlantic Ocean and Mediterranean Sea.

scholarly journals Growth patterns of the lanternfish Ceratoscopelus maderensis in the western Mediterranean Sea

2021 ◽  
Vol 85 (2) ◽  
pp. 71-80
Author(s):  
Enric Real ◽  
Ainhoa Bernal ◽  
Beatriz Morales-Nin ◽  
Balbina Molí ◽  
Itziar Alvarez ◽  
...  
Keyword(s):  
Atlantic Ocean ◽  
Mediterranean Sea ◽  
Western Mediterranean ◽  
Growth Patterns ◽  
Age And Growth ◽  
Mesopelagic Fish ◽  
Northeast Atlantic ◽  
Daily Increments ◽  
Western Mediterranean Sea ◽  
Northeast Atlantic Ocean

The age and growth patterns of the mesopelagic fish Ceratoscopelus maderensis (family Myctophidae) of the western Mediterranean Sea were described throughout its entire life cycle (from larvae to adult stages) using the sagittae otoliths of 59 individuals collected in December 2009. Three characteristic zones were identified along the cross-section of the sagittae (larval, metamorphic and juvenile-adult zones). Assuming growth rings as daily increments, the age of the analysed individuals (from 3.5 to 64 mm standard length [SL]) would range from 7 to 332 days. The relationship between the number of increments and the fish SL was fitted to a von Bertalanffy growth model (SL=70.5899Å~(1–exp(–0.0501(t+2.6705))). The growth pattern of C. maderensis in the western Mediterranean Sea was similar to that reported for this species in the northeast Atlantic Ocean. Though from a body size of 40-45 mm SL, growth rates declined more slowly in individuals from the western Mediterranean Sea, growth differences between these individuals and those from the northeast Atlantic Ocean were not statistically significant. This study provides new insights into the age and growth patterns of one of the most abundant mesopelagic fish species in the Mediterranean Sea that have clear implications for the study and management of marine ecosystems.

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