POPs in free-ranging pilot whales, sperm whales and fin whales from the Mediterranean Sea: Influence of biological and ecological factors

2015 ◽  
Vol 142 ◽  
pp. 185-196 ◽  
Author(s):  
Marianna Pinzone ◽  
Hélène Budzinski ◽  
Aurélie Tasciotti ◽  
Denis Ody ◽  
Gilles Lepoint ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Ecological Factors ◽  
Sperm Whales ◽  
The Mediterranean ◽  
Fin Whales ◽  
Pilot Whales ◽  
Free Ranging

Occurrence of anthropozoonotic parasitic infections and faecal microbes in free-ranging sperm whales (Physeter macrocephalus) from the Mediterranean Sea

2018 ◽  
Vol 117 (8) ◽  
pp. 2531-2541 ◽  
Author(s):  
Carlos Hermosilla ◽  
J. Hirzmann ◽  
L. M. R. Silva ◽  
J. M. Brotons ◽  
M. Cerdà ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Parasitic Infections ◽  
Physeter Macrocephalus ◽  
Sperm Whales ◽  
The Mediterranean ◽  
Free Ranging

scholarly journals Wild whale faecal samples as a proxy of anthropogenic impact

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Marianna Marangi ◽  
Sabina Airoldi ◽  
Luciano Beneduce ◽  
Claudio Zaccone
Keyword(s):  
Heavy Metals ◽  
Mediterranean Sea ◽  
Limit Of Detection ◽  
Sperm Whale ◽  
Anthropogenic Activity ◽  
Physeter Macrocephalus ◽  
Sperm Whales ◽  
Faecal Samples ◽  
Fin Whales ◽  
Free Ranging

AbstractThe occurrence of protozoan parasite, bacterial communities, organic pollutants and heavy metals was investigated in free-ranging species of fin (Balaenoptera physalus, n. 2) and sperm (Physeter macrocephalus, n. 2) whales from the Pelagos Sanctuary, Corsican-Ligurian Provencal Basin (Northern-Western Mediterranean Sea). Out of four faecal samples investigated, two from fin whales and one from sperm whale were found positive to Blastocystis sp. A higher number of sequences related to Synergistetes and Spirochaetae were found in sperm whales if compared with fin whales. Moreover, As, Co and Hg were found exclusively in sperm whale faecal samples, while Pb was found only in fin whale faecal samples. The concentration of both PAH and PCB was always below the limit of detection. This is the first report in which the presence of these opportunistic pathogens, bacteria and chemical pollutants have been investigated in faecal samples of free-ranging whale species and the first record of Blastocystis in fin and sperm whales. Thus, this study may provide baseline data on new anthropozoonotic parasite, bacterial records and heavy metals in free-ranging fin and sperm whales, probably as a result of an increasing anthropogenic activity. This survey calls for more integrated research to perform regular monitoring programs supported by national and/or international authorities responsible for preservation of these still vulnerable and threatened whale species in the Mediterranean Sea.

scholarly journals Severity Scoring of Behavioral Responses of Sperm Whales (Physeter macrocephalus) to Novel Continuous versus Conventional Pulsed Active Sonar

2021 ◽  
Vol 9 (4) ◽  
pp. 444
Author(s):  
Charlotte Curé ◽  
Saana Isojunno ◽  
Marije L. Siemensma ◽  
Paul J. Wensveen ◽  
Célia Buisson ◽  
...  
Keyword(s):  
Behavioral Responses ◽  
Physeter Macrocephalus ◽  
Vital Rates ◽  
Sperm Whales ◽  
Experimental Conditions ◽  
Active Sonar ◽  
Lower Amplitude ◽  
Pilot Whales ◽  
New Generation ◽  
Free Ranging

Controlled exposure experiments (CEEs) have demonstrated that naval pulsed active sonar (PAS) can induce costly behavioral responses in cetaceans similar to antipredator responses. New generation continuous active sonars (CAS) emit lower amplitude levels but more continuous signals. We conducted CEEs with PAS, CAS and no-sonar control on free-ranging sperm whales in Norway. Two panels blind to experimental conditions concurrently inspected acoustic-and-movement-tag data and visual observations of tagged whales and used an established severity scale (0–9) to assign scores to putative responses. Only half of the exposures elicited a response, indicating overall low responsiveness in sperm whales. Responding whales (10 of 12) showed more, and more severe responses to sonar compared to no-sonar. Moreover, the probability of response increased when whales were previously exposed to presence of predatory and/or competing killer or long-finned pilot whales. Various behavioral change types occurred over a broad range of severities (1–6) during CAS and PAS. When combining all behavioral types, the proportion of responses to CAS was significantly higher than no-sonar but not different from PAS. Responses potentially impacting vital rates i.e., with severity ≥4, were initiated at received cumulative sound exposure levels (dB re 1 μPa2 s) of 137–177 during CAS and 143–181 during PAS.

The first identified winter feeding ground of fin whales (Balaenoptera physalus) in the Mediterranean Sea

2006 ◽  
Vol 86 (4) ◽  
pp. 903-907 ◽  
Author(s):  
Simonepietro Canese ◽  
Andrea Cardinali ◽  
Caterina Maria Fortuna ◽  
Michela Giusti ◽  
Giancarlo Lauriano ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Feeding Activity ◽  
Central Mediterranean ◽  
Fin Whale ◽  
Feeding Ground ◽  
The North ◽  
South Central ◽  
The Mediterranean ◽  
Fin Whales ◽  
Winter Feeding

The presence of fin whales in the Mediterranean Sea has been documented since ancient times. In spite of this, reliable information on their ecology and distribution is limited to the north-western part of the basin. Recent genetic studies have demonstrated that Mediterranean fin whales comprise a separate population with very limited gene flow with their North Atlantic co-specifics. Although both published and anecdotal information reports their presence in the south central Mediterranean during winter, there is no information on habitat use. In February 2004, a 14-day boat survey was carried out in the waters surrounding the island of Lampedusa, where fin whales occur at this time of the year. A total of 20 fin whale groups (average group size two animals) were encountered. In each encounter the animals were engaged in surface feeding activity. From plankton samples and underwater video, the prey species was identified as the Euphausiid, Nyctiphanes couchi. The information obtained suggests that this area may be an important winter feeding ground for fin whales. The results represent significant new information on fin whale ecology in the Mediterranean, with associated conservation and management implications.

scholarly journals Ecological niches of three teuthophageous odontocetes in the northwestern Mediterranean Sea

Ocean Science ◽  
2008 ◽  
Vol 4 (1) ◽  
pp. 49-59 ◽  
Author(s):  
E. Praca ◽  
A. Gannier
Keyword(s):  
Mediterranean Sea ◽  
Sperm Whale ◽  
Ecological Niches ◽  
Sperm Whales ◽  
Ligurian Sea ◽  
Data Set ◽  
Pilot Whale ◽  
Northwestern Mediterranean Sea ◽  
Pilot Whales ◽  
Northwestern Mediterranean

Abstract. In the northwestern Mediterranean Sea, sperm whales, pilot whales and Risso's dolphins prey exclusively or preferentially on cephalopods. In order to evaluate their competition, we modelled their habitat suitability with the Ecological Niche Factor Analysis (ENFA) and compared their ecological niches using a discriminant analysis. We used a long term (1995–2005) small boat data set, with visual and acoustic (sperm whale) detections. Risso's dolphin had the shallowest and the more spatially restricted principal habitat, mainly located on the upper part of the continental slope (640 m mean depth). With a wider principal habitat, at 1750 m depth in average, the sperm whale used a deeper part of the slope as well as the closest offshore waters. Finally, the pilot whale has the most oceanic habitat (2500 m mean depth) mainly located in the central Ligurian Sea and Provençal basin. Therefore, potential competition for food between these species may be reduced by the differentiation of their habitats.

scholarly journals First case of erysipelas in a free-ranging bottlenose dolphin (Tursiops truncatus) stranded in the Mediterranean Sea

2011 ◽  
Vol 97 (2) ◽  
pp. 167-170 ◽  
Author(s):  
M Melero ◽  
C Rubio-Guerri ◽  
JL Crespo ◽  
M Arbelo ◽  
AI Vela ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Bottlenose Dolphin ◽  
Tursiops Truncatus ◽  
First Case ◽  
The Mediterranean ◽  
Free Ranging
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