Gametogenesis and larval development in Sabella spallanzanii (Polychaeta: Sabellidae) from the Mediterranean Sea

2000 ◽  
Vol 136 (5) ◽  
pp. 847-861 ◽  
Author(s):  
A. Giangrande ◽  
M. Licciano ◽  
P. Pagliara ◽  
M. C. Gambi
Keyword(s):  
Mediterranean Sea ◽  
Larval Development ◽  
The Mediterranean

Morphological response of the larvae of Arbacia lixula to near-future ocean warming and acidification

2017 ◽  
Vol 74 (4) ◽  
pp. 1180-1190 ◽  
Author(s):  
Giulia Visconti ◽  
Fabrizio Gianguzza ◽  
Emanuela Butera ◽  
Valentina Costa ◽  
Salvatrice Vizzini ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Larval Development ◽  
Thermal Tolerance ◽  
Population Connectivity ◽  
Mediterranean Population ◽  
Spawning Period ◽  
Increased Temperature ◽  
The Mediterranean ◽  
The Impact ◽  
Arbacia Lixula

The distribution of the sea urchin Arbacia lixula, a warm affinity species, has been expanding in the Mediterranean Sea. To address questions on potential for future success of this species in the region, the thermotolerance of larval development was investigated in context of regional warming. The larvae were reared in present day spawning period (20 °C) and warming conditions (+4 = 24 and +6 = 26 °C). As the calcifying larvae of sea urchins are vulnerable to stunted growth caused by ocean acidification, the impact of lower pH (−0.3 pH units) on larval development was also investigated in combination with warming. Morphological traits of the larvae, post-oral length arms, overall length of larvae and body length, were affected by increased temperature across pH treatments, indicating that for the larvae of southern Mediterranean population here, 24 °C appears to approximate the optimal temperature for development. A slightly negative effect of pH was evident. Increased temperature ameliorated the stunting effect of acidification on growth. The thermal tolerance of A. lixula development overlaps with projections for warming in the region by 2100 and also indicates that this species has acclimatized or adapted its reproductive biology to the broad environmental conditions of the Mediterranean Sea. Due to the broad thermal range (∼10 °C) of development of A. lixula across its distribution, this species is likely to be a winner in the climate change stakes. The broad thermal tolerance of the larvae is likely to assure population connectivity between Mediterranean sub-basins populations. The continued success of A. lixula can have a strong consequences for the ecological structure of Mediterranean rocky habitat.

Planktotrophic Columbellidae (Gastropoda) in the northeast Atlantic and the Mediterranean Sea, with description of a new species in the genus Mitrella

2020 ◽  
Vol 96 (1) ◽  
pp. 145-168
Author(s):  
Serge Gofas ◽  
Ángel Luque ◽  
Javier Urra
Keyword(s):  
New Species ◽  
Mediterranean Sea ◽  
Larval Development ◽  
Alboran Sea ◽  
Eastern Atlantic Ocean ◽  
Ca 50 ◽  
The Mediterranean ◽  
First Time ◽  
A New Species ◽  
Alborán Sea

Few of the ca 50 species of Columbellidae found in the eastern Atlantic Ocean have planktotrophic larval development denoted by a multispiral protoconch. One species of the genus Mitrella, ranging from the mid-Atlantic seamounts to the Alboran Sea, is here described as new to science and the geographic and bathymetric distributions of another three species, Amphissa acutecostata (Philippi, 1844), Mitrella canariensis (d'Orbigny, 1840) and M. nitidulina (Locard, 1897) are updated. The name Mitrella canariensis is shown to have precedence over M. pallaryi (Dautzenberg, 1927). Mitrella nitidulina is absent in the Mediterranean Sea, and A. acutecostata, the only amphiatlantic species, is recorded for the first time as living in the Alboran Sea. There is a definite differentiation in the bathymetrical range of these species, with M. canariensis being the shallowest and M. nitidulina being the deepest.

scholarly journals First description of early developmental stages of the native invasive fireworm Hermodice carunculata (Annelida, Amphinomidae): a cue to the warming of the Mediterranean Sea

2020 ◽  
Author(s):  
ANDREA TOSO ◽  
SARAH BOULAMAIL ◽  
NICOLA LAGO ◽  
CATALDO PIERRI ◽  
STEFANO PIRAINO ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Larval Development ◽  
Developmental Stages ◽  
Temperature Threshold ◽  
Hermodice Carunculata ◽  
Southern Mediterranean ◽  
Northward Expansion ◽  
The Mediterranean ◽  
Native Invasive ◽  
Early Developmental

Observations on the reproductive behavior and larval development of the bristled fireworm Hermodice carunculata, a common inhabitant of shallow marine rocky bottoms in the Southern Mediterranean Sea, are reported here. In recent years, an increase in abundance and a northward expansion of the populations along the Southern Italian coast were jointly detected, presumably linked to rising water temperature in the Mediterranean Sea. After making in situ observations on two consecutive spawning events, live worms and fresh spawn were brought into the lab, kept at either 27 ºC or 22 ºC and followed through development. Complete and normal development was observed only at 27°C. By contrast, embryonic and larval development appeared to be slowed down at 22°C, stopping at the protrochophora stage. Early development of H. carunculata suggests the existence of a long pre-metamorphic, planktotrophic period in the water column that can explain the genetic cohesion of this species and the low genetic divergence found among populations across the Atlantic Ocean. The observed increase in abundance, invasiveness potential, and geographical northern distribution of the bearded fireworms is probably determined by a progressive northward latitudinal shift of the sea surface temperature coincident with the temperature threshold required for the developmental and reproductive success of the worm.

Aeromonas dhakensis pneumonia and sepsis in a neonate Risso’s dolphin Grampus griseus from the Mediterranean Sea

2015 ◽  
Vol 116 (1) ◽  
pp. 69-74 ◽  
Author(s):  
L Pérez ◽  
ML Abarca ◽  
F Latif-Eugenín ◽  
R Beaz-Hidalgo ◽  
MJ Figueras ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Grampus Griseus ◽  
The Mediterranean ◽  
Risso's Dolphin

Dolphin Morbillivirus in the Mediterranean Sea

2008 ◽  
Vol 34 (4) ◽  
pp. 514-515 ◽  
Author(s):  
Giovanni Di Guardo
Keyword(s):  
Mediterranean Sea ◽  
Dolphin Morbillivirus ◽  
The Mediterranean
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