scholarly journals Cetacean diversity on the Parnaiba Delta, Maranhão state, northeastern Brazil

2008 ◽  
Vol 68 (3) ◽  
pp. 545-551 ◽  
Author(s):  
FA. Magalhães ◽  
CH. Tosi ◽  
RG. Garri ◽  
S. Chellappa ◽  
FL. Silva
Keyword(s):  
Killer Whale ◽  
Current Knowledge ◽  
Sperm Whale ◽  
Distinct Species ◽  
Significant Degree ◽  
Northeastern Brazil ◽  
Brazilian Coast ◽  
Physeter Macrocephalus ◽  
Balaenoptera Acutorostrata ◽  
Estuarine Dolphin

The increase in the research of cetacean surveys on the Brazilian coast has brought new data on the distribution of species never reported before. The present work reviews the current knowledge on cetaceans species and extends this knowledge with an analysis of cetaceans stranded in the Parnaiba Delta, on the coast of Maranhão State, Brazil. The studies on cetacean diversity on the coast of the Parnaíba Delta were made from August 2004 to August 2006. Fourteen strandings were reported, representing six distinct species, such as the estuarine dolphin (Sotalia guianensis), humpback whale (Megaptera novaeangliae), Bryde's whales (Balaenoptera edeni), dwarf minke whale (Balaenoptera acutorostrata), pigmy killer whale (Feresa attenuata), sperm whale (Physeter macrocephalus) and two specimens which have not yet been identified. The significant degree of cetacean diversity in the region shows that the Parnaíba Delta is, possibly, of an important area for cetacean studies in Brasil.

Cetacean strandings on the coast of Ceará, north-eastern Brazil (1992–2005)

2009 ◽  
Vol 89 (5) ◽  
pp. 1083-1090 ◽  
Author(s):  
Ana Carolina O. Meirelles ◽  
Cassiano Monteiro-Neto ◽  
Aline M.A. Martins ◽  
Alexandra F. Costa ◽  
Helen M.D.R. Barros ◽  
...  
Keyword(s):  
Sperm Whale ◽  
Human Consumption ◽  
Physeter Macrocephalus ◽  
Balaenoptera Acutorostrata ◽  
Cetacean Species ◽  
Sotalia Guianensis ◽  
Steno Bredanensis ◽  
Estuarine Dolphin ◽  
Lagenodelphis Hosei ◽  
Pseudorca Crassidens

This study reviews and updates information on cetacean strandings in the state of Ceará, Brazil (02°30′S 41°15′W– 04°30′S 36°45′W), comprising 573 km of coastline. In the years 1992–2005, there were 252 cetacean stranding events, representing 19 species: three species of Balaenopteridae, three Physeteridae, two Kogiidae, two Ziphiidae and 11 Delphinidae. Three species comprised the majority (78.9%) of stranding events: estuarine dolphin, Sotalia guianensis (61.9%); sperm whale, Physeter macrocephalus (10.3%); and rough-toothed dolphin, Steno bredanensis (6.7%). There was an increasing trend in the number of cases reported in the first five years with a highest frequency achieved in 1996. Stranding events occurred throughout the year, with the lowest frequency occurring in the autumn (March–May). Approximately 4% of the events were attributed to natural causes while 24.6% were human-related, mainly incidental captures. Meat removal for human consumption or bait was recorded in 6.7% of events. In the study area, Sotalia guianensis, P. macrocephalus and Steno bredanensis were the most abundant cetacean species, whereas Lagenodelphis hosei, Pseudorca crassidens, Orcinus orca, Kogia sima, Mesoplodon europaeus, Balaenoptera acutorostrata and Balaenoptera bonaerensis are probably rare in the area.

Sablefish mortality associated with whale depredation in Alaska

2017 ◽  
Vol 74 (5) ◽  
pp. 1382-1394 ◽  
Author(s):  
Megan J. Peterson ◽  
Dana Hanselman
Keyword(s):  
Killer Whale ◽  
Stock Assessment ◽  
Sperm Whale ◽  
Statistical Modelling ◽  
Gulf Of Alaska ◽  
Fish Stock ◽  
Physeter Macrocephalus ◽  
Commercial Fishery ◽  
Catch Rates ◽  
The Impact

Killer whale (Orcinus orca) and sperm whale (Physeter macrocephalus) depredation (whales removing or damaging fish caught on fishing gear) can reduce catch rates and decrease the accuracy of fish stock assessments. This study advances our understanding of the impact of whale depredation on the commercial sablefish (Anoplopoma fimbria) fishery in Alaska and evaluates the impact depredation may have on the annual federal sablefish assessment. A statistical modelling approach was used to estimate the whale effect on commercial sablefish fishery catch rates; killer whale depredation was more severe (catch rates declined by 45%–70%) than sperm whale depredation (24%–29%). Total estimated sablefish catch removals 1995–2014 ranged from 1251 t to 2407 t by killer whales in western Alaska management areas and 482 t to 1040 t by sperm whales in the Gulf of Alaska 2001–2014. Including sablefish mortality due to whale depredation on the commercial fishery in the sablefish stock assessment resulted in a 1% reduction in the recommended quota. Accounting for sablefish mortality due to whale depredation in the commercial fishery in the sablefish assessment will occur tandem with correcting for depredation on the annual National Marine Fisheries Service longline survey, the primary survey index used in the assessment.

The cetaceans of Aruba, southern Caribbean

2013 ◽  
Vol 94 (6) ◽  
pp. 1161-1174 ◽  
Author(s):  
Jolanda A. Luksenburg
Keyword(s):  
Killer Whale ◽  
Sperm Whale ◽  
Common Dolphin ◽  
Physeter Macrocephalus ◽  
Cetacean Species ◽  
Additional Species ◽  
Pilot Whale ◽  
Stenella Frontalis ◽  
Spotted Dolphin ◽  
Delphinus Capensis

Aruba is one of the most densely populated islands in the Caribbean. However, very little is known about its cetaceans. In 2010 and 2011, a total of 19721 km (1686 h) boat-based surveys over nearshore transects resulted in 117 positively-identified sightings comprising eight species. New records are also added for one of three previously-documented species. Five additional species were documented from strandings or reports by others. This brings the total number of cetacean species identified in Aruban waters to 16, of which nine are authenticated here for the first time. Atlantic spotted dolphin (Stenella frontalis (N = 59) and bottlenose dolphin (Tursiops truncatus) (N = 33) were the most frequently observed species, with sightings of both year-round, followed by spinner dolphin (S. longirostris) and false killer whale (Pseudorca crassidens). Additional species recorded are pantropical spotted dolphin (S. attenuata), striped dolphin (S. coeruleoalba), common dolphin (Delphinus capensis), rough-toothed dolphin (Steno bredanensis), short-finned pilot whale (Globicephala macrorhynchus), killer whale (Orcinus orca), Risso's dolphin (Grampus griseus), humpback whale (Megaptera novaeangliae), Bryde's/Eden's whale (Balaenoptera brydei/edeni), sperm whale (Physeter macrocephalus) and an unidentified beaked whale (Mesoplodon sp.). All cetaceans were sighted within 22 km of the coast in relatively shallow waters. Sighting rate was low (0.69 cetacean sightings per 100 km). Sightings of calves and neonates indicate that Aruba may be a nursing or breeding area for some species. The presence of several species of cetaceans in Aruba's coastal waters year-round indicates that status and threat assessments are needed to protect them.

scholarly journals Marine Mammal and Sea Turtle Sightings During a Survey of the Endeavour Segment of the Juan de Fuca Ridge, British Columbia

2017 ◽  
Vol 131 (2) ◽  
pp. 120-124
Author(s):  
Meike Holst
Keyword(s):  
British Columbia ◽  
Marine Mammals ◽  
Current Knowledge ◽  
Sea Turtles ◽  
Sperm Whale ◽  
Sea Turtle ◽  
Elephant Seal ◽  
Physeter Macrocephalus ◽  
Northern Elephant Seal ◽  
Leatherback Turtle

Marine mammals and sea turtles were documented as part of a monitoring and mitigation program during a seismic study offshore (~250 km) from Vancouver island, British Columbia, during August–September 2009. Forty-one marine mammals in nine groups were sighted. Dall’s Porpoise (Phocoenoides dalli) was the most frequently sighted species. A Sperm Whale (Physeter macrocephalus), a pod of Pacific White-sided Dolphins (Lagenorhynchus obliquidens), an unidentified toothed whale, a Northern Elephant Seal (Mirounga angustirostris), and a leatherback Turtle (Dermochelys coriacea) were also observed. These data augment current knowledge on the occurrence of marine mammals and sea turtles in the offshore waters of British Columbia.

scholarly journals Maxillary teeth in sperm whales, Physeter macrocephalus (Cetacea: Physeteridae)

2015 ◽  
Vol 32 (03) ◽  
pp. 212-215 ◽  
Author(s):  
G. Toledo ◽  
A. Langguth
Keyword(s):  
Functional Morphology ◽  
Age Determination ◽  
Sperm Whale ◽  
Northeastern Brazil ◽  
Physeter Macrocephalus ◽  
Sperm Whales ◽  
Real Frequency ◽  
Pulp Cavity ◽  
Mandibular Teeth ◽  
The Right

AbstractSperm whales, Physeter macrocephalus Linnaeus, 1758, have 18 to 28 pairs of well developed conical mandibular teeth, but maxillary teeth are vestigial and supposedly rare. The aim of this study is to report a new case of erupted maxillary teeth in P. macrocephalus, the first description for Brazil. On 29 October 2008 a female sperm whale was found stranded in Campina's Beach (06° 46' S, 34° 55' W), Paraíba state, northeastern Brazil. Inspection on the gums revealed three upper teeth on the right maxilla, corresponded to mandibular teeth 9 to 11 in a rostrocaudal sequence. The maxillary teeth were nearly straight, strongly worn in the tip and had no pulp cavity remaining. Most literature states that maxillary teeth are absent or rarely present, somewhat questionable, since other authors never failed to expose them by an incision in the gum. Data show that upper teeth have been overlooked, and its real frequency can only be determined by thorough dissections. This is important, since the study of maxillary teeth can provide information about evolution, functional morphology and age determination in sperm whales.

Redescription of Orthopristis ruber and Orthopristis scapularis (Haemulidae: Perciformes), with a hybridization zone off the Atlantic coast of South America

Zootaxa ◽  
2019 ◽  
Vol 4576 (1) ◽  
pp. 109 ◽  
Author(s):  
ALEXANDRE PIRES MARCENIUK ◽  
RODRIGO ANTUNES CAIRES ◽  
LEONARDO MACHADO ◽  
NAJILA NOLIE CATARINE DANTAS CERQUEIRA ◽  
RAYLA ROBERTA M. DE S. SERRA ◽  
...  
Keyword(s):  
South America ◽  
Nuclear Dna ◽  
Atlantic Coast ◽  
Morphological Characteristics ◽  
Distinct Species ◽  
Valid Species ◽  
Brazilian Coast ◽  
Northern Coast ◽  
Western Atlantic ◽  
Coloration Patterns

The genus Orthopristis includes seven valid species, three from the western Atlantic and five from eastern Pacific, while the available identification guides and taxonomic keys incorrectly recognize Orthopristis ruber as the only valid species found on the Atlantic coast of South America. Efforts to expand the inventory of fish species from the northern coast of Brazil led to the identification of two distinct species of Orthopristis from Atlantic South America, based on the analysis of coloration patterns and meristic data, as well as DNA. In the present study, the limits of Orthopristis ruber are reviewed, while Orthopristis scapularis is recognized as a valid species for the northern and northeastern coasts of South America. Based on intermediate morphological characteristics and nuclear DNA markers, a hybrid zone was identified off the state of Espírito Santo, on the eastern Brazilian coast. Additionally, considerations are made on the diversity and biogeography of the coastal marine and estuarine fishes found on the Brazilian coast. 

Nouvelles données sur les cétacés des îles Kerguelen / New data on cetaceans of the Kerguelen Islands

Mammalia ◽  
2006 ◽  
Vol 70 (1-2) ◽  
Author(s):  
Daniel Robineau ◽  
Guy Duhamel
Keyword(s):  
Orcinus Orca ◽  
Eubalaena Glacialis ◽  
Physeter Macrocephalus ◽  
Balaenoptera Acutorostrata ◽  
Globicephala Melas ◽  
Ziphius Cavirostris ◽  
Dissostichus Eleginoides ◽  
Cephalorhynchus Commersonii ◽  
Nouvelles Espèces ◽  
Lagenorhynchus Cruciger

RésuméDes observations nouvelles et quelques échouages complètent le premier bilan faunistique établi en 1989 pour les îles Kerguelen. Aux neuf espèces identifiées précédemment ( Eubalaena glacialis , Balaenoptera acutorostrata , Megaptera novaeangliae , Physeter macrocephalus , Mesoplodon layardii , Cephalorhynchus commersonii , Lagenorhynchus cruciger , Orcinus orca , et Globicephala melas ) s'ajoutent, grâce à des échouages, deux nouvelles espèces: Ziphius cavirostris et Hyperoodon planifrons . En outre, la présence occasionnelle de Phocoena dioptrica est confirmée. L'événement le plus marquant est cependant le grand nombre d'observations (n=1649) de cachalots ( Physeter macrocephalus ) faites depuis 1989 au delà du plateau des îles, dans une zone peu fréquentée autrefois par les bateaux de pêche. Pour le dauphin de Commerson ( Cephalorhynchus commersonii ), espèce la plus commune, des données biologiques et écologiques s'ajoutent aux données faunistiques. Nous faisons également état, pour trois espèces ( Physeter macrocephalus , Orcinus orca , et Globicephala melas ), d'interactions avec la pêcherie à la palangre de la légine australe ( Dissostichus eleginoides ).

scholarly journals Preliminary results of drift-bottle releases and recoveries in the Western Tropical Atlantic

1967 ◽  
Vol 16 (1) ◽  
pp. 13-22 ◽  
Author(s):  
Ellen F. Luedemann
Keyword(s):  
Surface Current ◽  
Northeastern Brazil ◽  
Brazilian Coast ◽  
Northern Coast ◽  
The North ◽  
Strong Current ◽  
North Brazil ◽  
Equatorial Current ◽  
The Caribbean ◽  
Area North

In February-March 1963, during the Equalant Operation for the ICITA program, 476 drift-bottles were released at the equatorial waters off the northern Brazilian coast (01ºS to 09ºN and 043ºW to 053ºW). Thirty-five, bottles were recovered (7,4%). Those were classed in five groups according to their different velocity ranges and areas of recovery (Trinidad Island; Lesser Antilles; Caribbean and Florida area; north Brazil; northeastern Brazil). The recoveries of bottles released within 300 nm off the northern and northeastern coast of Brazil confirmed a strong current along the north and northeast coast in northwestern direction (South Equatorial Current and branches). In late February-early March the bottles showed maximum velocities of this current (3,6 knots). The region off the northern coast of Brazil, between 05ºN and 09ºN up to 050ºW seems to have been under the influence of an eastward component of the surface current in this same period, while at late March this influence appears to have been weaker. In the region from Trinidad Island to Yucatan Peninsula the current seems to be stronger on the northeastern side of the Caribbean Sea.

scholarly journals Cetaceans registered on the coast of Ilhéus (Bahia), northeastern Brazil

2012 ◽  
Vol 12 (1) ◽  
pp. 31-38 ◽  
Author(s):  
Renata Lúcia Guedes Batista ◽  
Alexandre Schiavetti ◽  
Urânia Amaral dos Santos ◽  
Maria do Socorro Santos dos Reis
Keyword(s):  
Municipal Government ◽  
Northeastern Brazil ◽  
Orcinus Orca ◽  
Physeter Macrocephalus ◽  
Downtown Area ◽  
Sotalia Guianensis ◽  
Fire Stations ◽  
Scientific Value ◽  
The City ◽  
Environmental Agency

Stranded cetaceans have scientific value and may confirm the occurrence of some species or indicate their geographical distribution in an area. The collection of biological material can also contribute to improve the knowledge of the species or populations inhabiting certain areas. This study aimed to record live or dead cetaceans found ashore along the coast of Ilhéus, Bahia State, northeastern Brazil. Data were collected through a campaign called "SOS strandings, whales, porpoises and dolphins." Between 1997 and 1999 three hundred posters and five hundred folders were distributed to beach huts, shops, fishing associations and settlements, the city's municipal government, the Brazilian Environmental Agency (IBAMA) and fire stations. During this campaign, which lasted until 2007 it was possible to record 38 cetaceans of ten species on the coast of Ilhéus: Physeter macrocephalus, Megaptera novaeangliae, Globicephala macrorhynchus, Orcinus orca, Peponocephala electra, Stenella clymene, Feresa attenuata, Ziphius cavirostris, Steno bredanensis and Sotalia guianensis. The greatest numbers of records were observed between 2000 and 2003, which was the period after the distribution of banners and posters. The majority of the carcasses were recovered near the city downtown area (<10 km) and there was not a relationship between the state of the carcasses and the distance from that area.

scholarly journals Butterflies (Lepidoptera: Papilionoidea) of the Restinga de Cabedelo National Forest, Paraíba State, Brazil

2021 ◽  
Vol 14 ◽  
pp. e970
Author(s):  
Adalberto Medeiros ◽  
Emanoel Pereira Gualberto ◽  
Rafael Pereira Rodrigues ◽  
Solange Maria Kerpel
Keyword(s):  
New Records ◽  
Northeastern Brazil ◽  
Brazilian Coast ◽  
National Forest ◽  
Butterfly Species ◽  
Preliminary Information ◽  
Butterfly Fauna ◽  
Forested Areas

Restinga forests are plant formations that occur on plains of quaternary sandy deposits along the Brazilian coast. Despite historical reduction of the Restinga forests, little effort has been made to know the butterfly fauna of these areas. This paper is an important contribution to the butterfly’s knowledge, being the second inventory in the Restinga forest of northeastern Brazil. The survey was conducted in the Restinga de Cabedelo National Forest (FLONA de Cabedelo, following the Portuguese abbreviation) and aimed to provide preliminary information on the butterflies richness in this region. A total of 89 butterfly species and 1,503 individuals were recorded at FLONA de Cabedelo. Hesperiidae was the richest family (34 species), followed by Nymphalidae (33) Pieridae (eight), Lycaenidae (seven), Riodinidae (five), and Papilionidae (two). In general, the butterfly fauna of the FLONA de Cabedelo is dominated by species widely distributed and commonly found in open or forested areas in Brazil. Five species are new records in Paraíba state: Calydna sturnula (Geyer), Theope foliorum (Bates), Cogia hassan (Butler), Vehilius inca (Scudder), and Chiothion asychis (Stoll). We suggest carrying out monthly samplings which will certainly increase the list of species herein presented.

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