scholarly journals Reproductive patterns and population characteristics in five deep-water pandalid shrimps in the Western Mediterranean along a depth gradient (150-1100 m)

1997 ◽  
Vol 148 ◽  
pp. 49-58 ◽  
Author(s):  
JB Company ◽  
F Sard
Keyword(s):  
Deep Water ◽  
Western Mediterranean ◽  
Population Characteristics ◽  
Depth Gradient ◽  
Reproductive Patterns

scholarly journals Deep-water macroalgal-dominated coastal detritic assemblages on the continental shelf off Mallorca and Menorca (Balearic Islands, Western Mediterranean)

2012 ◽  
Vol 55 (5) ◽  
Author(s):  
Sergi Joher ◽  
Enric Ballesteros ◽  
Emma Cebrian ◽  
Noemí Sánchez ◽  
Conxi Rodríguez-Prieto
Keyword(s):  
Continental Shelf ◽  
Deep Water ◽  
Western Mediterranean ◽  
Balearic Islands

Assessment of the deep water trawl fishery off the Balearic Islands (western Mediterranean): from single to multi-species approach

Hydrobiologia ◽  
2011 ◽  
Vol 670 (1) ◽  
pp. 67-85 ◽  
Author(s):  
Beatriz Guijarro ◽  
George Tserpes ◽  
Joan Moranta ◽  
Enric Massutí
Keyword(s):  
Deep Water ◽  
Western Mediterranean ◽  
Balearic Islands ◽  
Trawl Fishery

scholarly journals Reproduction and population structure of the sea cucumber Holothuria tubulosa in the Dardanelles Strait, Turkey

2015 ◽  
Vol 17 (1) ◽  
pp. 47 ◽  
Author(s):  
H. DERELİ ◽  
S. TÜRK ÇULHA ◽  
M. ÇULHA ◽  
B. H. ÖZALP ◽  
A. A. TEKİNAY
Keyword(s):  
Population Density ◽  
Gonadosomatic Index ◽  
Morphological Characteristics ◽  
Environmental Parameters ◽  
Population Characteristics ◽  
High Positive Correlation ◽  
Mediterranean Populations ◽  
Reproductive Patterns ◽  
First Time ◽  
The Relationship

In this study, Holothuria tubulosa Gmelin 1791 was investigated from April 2013 to March 2014 in the Dardanelles Strait, to outline the morphological characteristics, reproductive patterns and the relationship between population characteristics and environmental parameters. Between 15 and 30 individuals of this species were sampled monthly from three stations. There was a negative allometry between length and weight, being gutted weight the most reliable measurement for this species. Reproductive patterns of the species were identified the first time for Turkish coasts. By macroscopic examination of the gonads, smallest sizes (gutted length) were measured as 8.4 and 8.1 cm for female and male, respectively. Sex ratio was calculated as 1: 1.1 with differences between seasons. The reproduction of sea cucumbers occurred between August and September after Gonadosomatic Index (GSI) values reached their maximum in July. The species was found down to 10 m depth with a population density of 0.21 / m2, which was rather low compared to previously reported values for Mediterranean populations of this species. There was a high positive correlation between population density and GSI of the species. The highest population density was observed where the largest sea grass meadows are found.

scholarly journals Tracers confirm downward mixing of Tyrrhenian Sea upper waters associated with the Eastern Mediterranean Transient

2010 ◽  
Vol 7 (4) ◽  
pp. 1533-1557
Author(s):  
W. Roether ◽  
J. E. Lupton
Keyword(s):  
Deep Water ◽  
Time Scale ◽  
Eastern Mediterranean ◽  
Western Mediterranean ◽  
The Other ◽  
Tyrrhenian Sea ◽  
Convective Mixing ◽  
Deep Waters ◽  
Major Process ◽  
Gibraltar Strait

Abstract. Observations of tritium and 3He in the Tyrrhenian Sea, 1987–2009, confirm the enhanced convective mixing of intermediate waters into the deep waters that has been noted and associated with the Eastern Mediterranean Transient in previous studies. Our evidence for the mixing rests on increasing tracer concentrations in the Tyrrhenian deep waters, accompanied by decreases in the upper waters, which are supplied from the Eastern Mediterranean. The downward transfer is particularly evident between 1987 and 1997. Later on, information partly rests on increasing tritium-3He ages; here we correct the observed 3He for contributions released from the ocean floor. The Tyrrhenian tracer distributions are fully compatible with data upstream of the Sicily Strait and in the Western Mediterranean. The tracer data show that mixing reached to the bottom and confirm a cyclonic nature of the deep water circulation in the Tyrrhenian. They furthermore indicate that horizontal homogenization of the deep waters occurs on a time scale of several years. Various features point to a reduced impact of Western Mediterranean Deep Water (WMDW) in the Tyrrhenian during the enhanced-convection period. This is an important finding because it implies less upward mixing of WMDW, which has been named a major process to enable the WMDW to leave the Mediterranean via the Gibraltar Strait. On the other hand, the TDW outflow for several years represented a major influx of enhanced salinity and density waters into the deep-water range of the Western Mediterranean.

Evidence of a large δ13Ccarb and δ13Corg depth gradient for deep-water anoxia during the late Cambrian SPICE event

Geology ◽  
2018 ◽  
Vol 46 (7) ◽  
pp. 631-634 ◽  
Author(s):  
Dandan Li ◽  
Xiaolin Zhang ◽  
Dongping Hu ◽  
Xiaoyan Chen ◽  
Wei Huang ◽  
...  
Keyword(s):  
Deep Water ◽  
Depth Gradient ◽  
Late Cambrian ◽  
Spice Event
Sign in / Sign up

Export Citation Format

Share Document