scholarly journals Whalesuckers and a spinner dolphin bonded for weeks: does host fidelity pay off?

2003 ◽  
Vol 3 (2) ◽  
pp. 1-5 ◽  
Author(s):  
José Martins Silva-Jr ◽  
Ivan Sazima
Keyword(s):  
First Record ◽  
Host Fidelity ◽  
Social Nature ◽  
Eastern Brazil ◽  
Individual Host ◽  
North Eastern ◽  
Fernando De Noronha ◽  
In The Wild ◽  
Spinner Dolphins ◽  
First Time

The whalesucker Remora australis (Echeneidae) is an oceanic diskfish found attached to cetaceans only and its habits are therefore poorly known. At the Fernando de Noronha Archipelago, off North-eastern Brazil, spinner dolphins Stenella longirostris (Delphinidae) regularly congregate in large groups in a shallow bay, which allows for underwater observations of their behaviour and their fish associates. In the course of a broader study of this elusive diskfish, we had the opportunity to made multiple records of two whalesucker couples (three of the fish naturally marked) attached to the same individual dolphin in two different years, over periods of 47 and 87 days respectively. In all the sightings the whalesucker individuals of a couple were recorded side-by-side and positioned on their host’s belly. We surmise that at least one of the couples was a reproductive pair, as the belly of the larger fish was noticeably swollen in the last sighting, and the bulge on its belly was bilateral and extended almost uniformly to the vent, a strong indication of fully mature gonads. Moreover, its size matched those of the mature females of this diskfish species. To our knowledge, this is the first time that attachment fidelity of the whalesucker to any cetacean host is documented in the wild. We hypothesize that attachment fidelity to the same individual host increases the whalesucker’s chance to mate, and suggest further that the highly social nature of the spinner dolphins facilitates encounters between potential mating partners. Our study indicates that host fidelity possibly is not an uncommon feature of the whalesucker behaviour, albeit difficult to recognise. In one of the above recorded whalesuckers the natural marking was a crescentic scar characteristic of the wounds inflicted by the cookiecutter Isistius brasiliensis (Dalatiidae), a first record of the attack of this shark to any diskfish species.

First record of Cassis tuberosa spawning in the wild (north-east Brazil)

2015 ◽  
Vol 8 ◽  
Author(s):  
Thelma Lúcia Pereira Dias ◽  
Ellori Laíse Silva Mota
Keyword(s):  
First Record ◽  
Carbonate Sand ◽  
Soft Substrate ◽  
North East ◽  
Eastern Brazil ◽  
North Eastern ◽  
In The Wild ◽  
First Time

Spawning ofCassis tuberosais recorded and described for the first time, based on observations carried out in the Tamandaré reefs, north-eastern Brazil. The specimen was laying over gravel substrate surrounded by macroalgae at a depth of 2 m.Cassis tuberosauses an algal frond of the genusPadinato lay its eggs. The oothecae consists of approximately 200 vasiform capsules, orange in colour. The spawn ofCassis tuberosais quite similar to that produced by its congener,Cassis madagascariensis; however,Cassis tuberosaspawns in the soft substrate provided by algal fronds whileCassis madagascariensisutilizes coarse, carbonate sand. Considering thatCassis tuberosais the target of multiple commercial purposes, to expand our knowledge about its biology could contribute towards protecting the essential habitat of reproductively active individuals.

A new species of Stoeba (Demospongiae: Astrophorida) from oceanic islands off north-eastern Brazil

2007 ◽  
Vol 87 (6) ◽  
pp. 1387-1393 ◽  
Author(s):  
Fernando Moraes ◽  
Guilherme Muricy
Keyword(s):  
New Species ◽  
First Record ◽  
Oceanic Islands ◽  
Sao Paulo ◽  
Valid Species ◽  
Western Atlantic ◽  
Eastern Brazil ◽  
North Eastern ◽  
Fernando De Noronha ◽  
A New Species

The genus Stoeba has 11 recognized species. Herein we describe a new species of Stoeba endemic from two oceanic archipelagoes off north-eastern Brazil (Fernando de Noronha and São Pedro e São Paulo), constituting the first record of this genus for the western Atlantic. Stoeba latex sp. nov. is characterized by its thickly encrusting to massive shape, stretched surface, brownish-red colour, and spiculation of calthrops and sanidasters with well developed spines; dichotriaenes and oxeas are absent. Stoeba and Dercitus are very closely related genera, and should probably be merged. The genus Stoeba now contains the following valid species: S. dissimilis, S. exostotica, S. extensa, S. lesinensis, S. natalensis, S. occulta, S. pauper, S. plicata, S. reptans, S. simplex, S. syrmatita and S. latex sp. nov. Several other species still await description. A key to the valid species of Stoeba is given.

Descriptive and illustrated diagnosis of Ophiuroidea fauna (Echinodermata) in the shallow waters of North-eastern Brazil

2015 ◽  
Vol 8 ◽  
Author(s):  
Fabilene Gomes Paim ◽  
Maria Cecília Guerrazzi ◽  
Michela Borges
Keyword(s):  
Brittle Star ◽  
Shallow Waters ◽  
Bottom Substrate ◽  
Eastern Brazil ◽  
North Eastern ◽  
Amphipholis Squamata ◽  
Biological Substrates ◽  
Almost All ◽  
First Time ◽  
Ophiocoma Echinata

In this study, we present descriptions, illustrations, comments, and bathymetric and geographic distributions of the brittle star species related to the estuary region of Camamu Bay, located in the State of Bahia, Brazil. The brittle star fauna lives on biological substrates, sand bottoms, mud and rubble in the Camamu Bay and comprises 12 species divided into five families. Almost all of them are common in the tropical and subtropical fauna of the regions of shallow water.Ophiophragmus filograneusis reported for the first time in Bahia, and nine other species are recorded for the first time in Camamu Bay:Amphipholis januarii, Amphipholis squamata, Ophiophragmus filograneus, Ophiostigma isocanthum,Ophioderma cinerea, Ophioderma januarii, Ophiactis lymani, Ophiactis savignyi andOphiocoma echinata.The results suggest that the ophiuroid assemblages are strongly affected by marine currents as well as by different kinds of bottom substrate.

scholarly journals First record of Octomacrum europaeum Roman et Bychowsky, 1956 on the gills of spirlin Alburnoides bipunctatus (Bloch, 1782) in north-eastern Europe

2012 ◽  
Vol 49 (3) ◽  
pp. 187-188
Author(s):  
E. Dzika
Keyword(s):  
Eastern Europe ◽  
Original Description ◽  
First Record ◽  
Morphometric Characters ◽  
North Eastern ◽  
First Time

AbstractOctomacrum europaeum (Monogenea: Octomacridae) was collected, for the first time in north-eastern Europe, from the gills of spirlin (Alburnoides bipunctatus). Morphometric characters were compared with those of other populations and conform to the original description of the species.

Levels of helminth infection in the flat lizard Tropidurus semitaeniatus from north-eastern Brazil

2015 ◽  
Vol 90 (6) ◽  
pp. 779-783 ◽  
Author(s):  
C.H. Bezerra ◽  
R.W. Ávila ◽  
D.C. Passos ◽  
D. Zanchi-Silva ◽  
C.A.B. Galdino
Keyword(s):  
Body Size ◽  
Helminth Infection ◽  
Helminth Species ◽  
Intestinal Helminth ◽  
Helminth Parasites ◽  
Intestinal Nematode ◽  
Eastern Brazil ◽  
Host Sex ◽  
North Eastern ◽  
First Time

AbstractParasites represent a great, unknown component of animal biodiversity. Recent efforts have begun to uncover patterns of infection by helminth parasites in several Neotropical lizards. The present study reports, for the first time, levels of helminth infection in a population of the flat lizard Tropidurus semitaeniatus. One hundred and thirty-nine lizards were examined and evidence of five intestinal helminth species was found, comprising four species of nematodes, one species of cestode and an unidentified encysted larval nematode. The most frequently occurring species was the intestinal nematode Parapharyngodon alvarengai, which did not exhibit differences in prevalence and intensity of infection relative to host sex or age/body size. Furthermore, helminth species richness was not related to host body size.

The first record of genus Gryllomorpha Fieber in Romania (Orthoptera: Gryllidae: Gryllomorphinae)

Zootaxa ◽  
2019 ◽  
Vol 4543 (4) ◽  
pp. 581
Author(s):  
IONUȚ ȘTEFAN IORGU ◽  
DRAGAN CHOBANOV ◽  
MARIUS SKOLKA ◽  
RĂZVAN ZAHARIA ◽  
ELENA IULIA IORGU
Keyword(s):  
First Record ◽  
South Eastern ◽  
North Eastern ◽  
First Time

Although the fauna of Dobrogea (south-eastern Romania and north-eastern Bulgaria) is relatively well studied, the discovery of a crevice cricket was quite unexpected. Described from Ukraine and known to occur in Bulgaria, Greece, Turkey, Kazakhstan and possibly Uzbekistan, Gryllomorpha miramae is now recorded for the first time in Romania. 

Three new species of Cancellariidae (Gastropoda: Neogastropoda) from northeast Brazil with first record of Gergovia for the Atlantic ocean

Zootaxa ◽  
2007 ◽  
Vol 1387 (1) ◽  
pp. 59-68
Author(s):  
JOSÉ C.N. DE BARROS ◽  
SILVIO F.B. DE LIMA
Keyword(s):  
Atlantic Ocean ◽  
First Record ◽  
The State ◽  
The Body ◽  
Northeast Brazil ◽  
Deep Waters ◽  
Fernando De Noronha ◽  
Three New Species ◽  
Body Whorl ◽  
First Time

Brocchinia verheckeni n. sp. and Brocchinia harasewychi n. sp. are described from several stations from 340 to 720m on the Continental Slope off Northeast Brazil. Brocchinia verheckeni occurred from the states of Ceará to Sergipe, and B. harasewychi was collected from the states of Pernambuco to Alagoas. Both species are considered endemic to these regions. This is the second record of the genus Brocchinia Jousseaume, 1887 in deep waters off Brazil. Brocchinia harasewychi has a protoconch with 1 ¼ whorls, which is more inflated in comparison to B. verheckeni, the body whorl has 3 spiral cords, the uppermost bordering the suture and the other 2 near mid-whorl. The body whorl of Brocchinia verheckeni has 3 strongly nodulose spiral cords and an outer lip with 5 to 6 internal denticles, while that of B. harasewychi has a smooth outer lip. The genus Gergovia Cossmann, 1899 is recorded for the first time in the Atlantic Ocean with the description of Gergovia petiti n. sp., known only from the oceanic region from Northeast Brazil, occurring from the state of Ceará to the state of Bahia, as well as in the Fernando de Noronha archipelago, probably living in the muddy substrate at depths of between 206 and 720 meters.

The effect of the Fernando de Noronha plume on the mantle lithosphere in north-eastern Brazil

Lithos ◽  
2007 ◽  
Vol 94 (1-4) ◽  
pp. 111-131 ◽  
Author(s):  
Giorgio Rivalenti ◽  
Alberto Zanetti ◽  
Vicente A.V. Girardi ◽  
Maurizio Mazzucchelli ◽  
Colombo C.G. Tassinari ◽  
...  
Keyword(s):  
Mantle Lithosphere ◽  
Eastern Brazil ◽  
North Eastern ◽  
Fernando De Noronha

scholarly journals The conservation of Spix's macaw

Oryx ◽  
1990 ◽  
Vol 24 (4) ◽  
pp. 224-228 ◽  
Author(s):  
Tony Juniper ◽  
Carlos Yamashita
Keyword(s):  
Habitat Degradation ◽  
Habitat Conservation ◽  
Captive Population ◽  
Fully Integrated ◽  
Eastern Brazil ◽  
North Eastern ◽  
In The Wild ◽  
Integrated Conservation ◽  
Major Consideration

An expedition recently mounted in north-eastern Brazil gathered evidence strongly indicating that Spix's macaw Cyanopsitta spixii is effectively extinct in the wild. The only hope of saving the species from total extinction now rests with the small captive population. Fieldwork suggested that habitat degradation played a part in the decline of the species and it was concluded that habitat conservation should be a major consideration in future efforts to save it. A fully integrated conservation package is proposed that reflects the multiplicity of conservation needs of Spix's macaw.

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