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.

Origin and evolution of the frontoparietal complex in anurans

1988 ◽  
Vol 9 (4) ◽  
pp. 385-403 ◽  
Author(s):  
Zbynek Rocek
Keyword(s):  
Larval Development ◽  
Unique Feature ◽  
Developmental Stages ◽  
Origin And Evolution ◽  
Original State ◽  
Phylogenetic Relations ◽  
Early Developmental Stages ◽  
Larval Condition ◽  
Early Developmental ◽  
Important Character

AbstractThe frontoparietal is a unique feature of anurans, not only if this group is compared with other amphibians, but also with other vertebrates as well. It is often used as an important character in anuran systematics. However, little is still known about its evolutionary origin and significance. This is the reason why its state in Triadobatrachus and fossil anurans was examined, and compared with the condition in osteolepiforms and labyrinthodonts. Besides that also an information from the larval development was taken into consideration. It follows from all these data that the frontoparietal in adult anurans is a compound bone; the originally independent elements forming it (frontals, parietals, and some other ones) either coalesced with each other, or have disappeared during the course of evolution, often in convergent fashion. As the original state is better reflected in early developmental stages, one may suppose that larval condition also better reflects phylogenetic relations than the definitive bone complex of adults.

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

scholarly journals New record of Pterois cf. miles (Actinopterygii: Scorpaeniformes: Scorpaenidae) from the eastern middle Adriatic Sea (Croatian waters): Northward expansion

2021 ◽  
Vol 51 (4) ◽  
pp. 379-383
Author(s):  
Branko Dragičević ◽  
Pero Ugarković ◽  
Maja Krželj ◽  
Damir Zurub ◽  
Jakov Dulčić
Keyword(s):  
Mediterranean Sea ◽  
New Record ◽  
Adriatic Sea ◽  
Single Specimen ◽  
Video Footage ◽  
Northward Expansion ◽  
The Mediterranean

A single specimen of Pterois cf. miles has been recorded in the eastern middle Adriatic Sea. It was observed near the island of Vis at a depth of 15 m. The location of the record is further north than previous Adriatic records and it constitutes the northernmost record of this species in the Mediterranean Sea to date. The record is based solely on photographs and video footage provided by a professional underwater photographer.

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 Ecology, distribution and expansion of a Mediterranean native invader, the fireworm Hermodice carunculata (Annelida)

2020 ◽  
Author(s):  
SARA RIGHI ◽  
DANIELA PREVEDELLI ◽  
ROBERTO SIMONINI
Keyword(s):  
Mediterranean Sea ◽  
Benthic Communities ◽  
Seawater Temperature ◽  
Warming Trend ◽  
Western Mediterranean ◽  
Generalist Predator ◽  
Central Mediterranean ◽  
Hermodice Carunculata ◽  
Poleward Shift ◽  
The Mediterranean

Global change and the overall raise of seawater temperature are causing a poleward shift in species distribution, increasing the occurrence of warm-water biota in many ecosystems worldwide. In the Mediterranean, the ongoing sea warming is promoting native subtropical species to invader status. The bearded fireworm Hermodice carunculata (Amphinomida) is a thermophilic generalist predator spreading in the Central Mediterranean Sea. Although it is a typical inhabitant of Ionian coasts, several sightings have occurred at more northerly localities along the Tyrrhenian and Adriatic Seas, suggesting that density increases and range expansion are underway. These distributional records are in contrast with historical literature and museum collections, which provide poor sporadic information.The present study aimed at investigating the spatiotemporal changes that have occurred in H. carunculata abundances and distribution in the Mediterranean basins surrounding the Italian peninsula so far. We examined an exhaustive collection of existing information. A total of 857 reports of H. carunculata were collected from 368 localities. These data significantly expand knowledge on the life and feeding habit of H. carunculata. The integration of different data sources allowed the reconstruction of the shifts that have happened over the last 50 years, which are coherent with the consistent warming trend of Mediterranean Sea surface temperatures. Recent colonization events have occurred both along the Adriatic and Western Mediterranean coasts. The present findings provide unique insights into the expansion of H. carunculata, supporting future spreading throughout the Northern and Western Mediterranean. Tracking these changes is critical to assess potential impacts on coastal rocky-benthic communities, public health and commercial fisheries.

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