Cetacean records along a coastal-offshore gradient in the Vitória-Trindade Chain, western South Atlantic Ocean

Wedekin, Leonardo L.; Rossi‐Santos, Marcos R.; Baracho, Clarêncio G.; Cypriano-Souza, A. L.; Simões‐Lopes, Paulo C.

doi:10.1590/1519-6984.21812

Cited by 22 publications

(17 citation statements)

References 13 publications

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“…At this breeding ground, humpback whales have also been observed near oceanic islands, such as the Fernando de Noronha Archipelago and Trindade Island (Lodi , Wedekin et al . ). In the eastern Pacific Ocean, humpback whales from BSG occur from the northern coast of Peru (5°S) to Costa Rica (12°N), with a very low density of whales found around the Galápagos Archipelago, located 1,000 km west of the Ecuador coast (Acevedo‐Gutiérrez and Smultea ; Flórez‐González et al .…”

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“…In the southwestern Atlantic Ocean, whales from BSA are mainly found along the Brazilian coast from approximately 5°S to 23°S, with the Abrolhos Bank (16°40'-19°30'S and 37°25'-39°45'W) being the main mating and calving area for this population (Andriolo et al 2010). At this breeding ground, humpback whales have also been observed near oceanic islands, such as the Fernando de Noronha Archipelago and Trindade Island (Lodi 1994, Wedekin et al 2014. In the eastern Pacific Ocean, humpback whales from BSG occur from the northern coast of Peru (5°S) to Costa Rica (12°N), with a very low density of whales found around the Gal apagos Archipelago, located 1,000 km west of the Ecuador coast (Acevedo-Guti errez and Smultea 1995;Fl orez-Gonz alez et al 1998;F elix et al 2011.…”

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Genetic differentiation between humpback whales (Megaptera novaeangliae) from Atlantic and Pacific breeding grounds of South America

Cypriano-Souza

Engel

Caballero

et al. 2016

Marine Mammal Science

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Humpback whales wintering in tropical waters along the Atlantic and Pacific coasts of the South American continent are thought to represent distinct populations or “stocks.” Here we present the first analysis of genetic differentiation and estimates of gene flow between these breeding stocks, based on both mitochondrial DNA (mtDNA) control region sequences (465 bp) and 16 microsatellite loci from samples collected off Brazil (n = 277) and Colombia (n = 148), as well as feeding areas near the western Antarctic Peninsula (n = 86). We found significant differentiation between Brazilian and Colombian breeding grounds at both mtDNA (FST = 0.058) and microsatellite (FST = 0.011) markers and corroborated previous studies showing genetic similarity between humpbacks from Colombia and those from Antarctic Peninsula feeding areas. Estimates of long‐term gene flow between Brazil and Colombia were low to moderate, asymmetrical, and mostly mediated by males. Assignment procedures detected some cases of interchange and individuals of admixed ancestry between breeding grounds, indicating limited mixing of individuals between these stocks. Overall, results highlight the differentiation of humpback whale breeding populations with adjacent feeding grounds. This appears to be a remarkable example of fidelity to seasonal habitat in the absence of any contemporary barriers.

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confidence: 99%

Genetic differentiation between humpback whales (Megaptera novaeangliae) from Atlantic and Pacific breeding grounds of South America

Cypriano-Souza

Engel

Caballero

et al. 2016

Marine Mammal Science

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“…Such highly productive seamounts of the South Atlantic can provide feeding opportunities and therefore constitute important blue whale habitats. Previous surveys along the Vitória-Trindade Seamount chain have recorded fin (Balaenoptera physalus), Antarctic minke (B. bonaerensis), humpback whales (Megaptera novaeangliae) (Zerbini et al 2011;Wedekin et al 2014;Bittencourt et al 2016) and also mother-calf pairs of sei whales (Balaenoptera borealis) (Heissler et al 2016).…”

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confidence: 99%

Occurrence of blue whales (Balaenoptera musculus) in offshore waters of southeastern Brazil

Rocha¹,

Marchetto²,

Pacheco³

et al. 2019

Mar Biodivers Rec

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At-sea sightings of blue whales, Balaenoptera musculus, in Brazil are rare. A mother-calf pair was observed in deep (2645 m) waters off southeastern Brazil (22°11′S 038°58′W); during a seismic survey in July 2014. It is unknown to which of the subspecies the animals sighted belong. The presence of a calf suggests that blue whales use deep waters off Brazil as calving or nursing grounds. The identification and conservation of wintering grounds for blue whale populations is important to promote the recovery of blue whales as their numbers were critically reduced as a result of commercial whaling.

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“…The distribution of humpback whales is quite different; they occur mainly between Rio Grande do Norte state (RN; ~5°S) and RJ (21-23°S; Zerbini et al 2004, Andriolo et al 2010b, and higher densities are found along the coasts of BA and northern Espírito Santo state (ES; Andriolo et al 2010b). Unlike southern right whales, humpback whales have also been recorded around oceanic islands off the Brazilian coast (Lodi 1994, Siciliano et al 2012, Wedekin et al 2014).…”

Section: Humpback and Southern Right Whale Distribution Off The Brazimentioning

confidence: 99%

From the southern right whale hunting decline to the humpback whaling expansion: a review of whale catch records in the tropical western South Atlantic Ocean

et al. 2016

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Historical catch records from whaling activity are crucial for assessments of whale populations. However, several gaps in the exploitation history for many populations from before the twentieth century create limitations that may lead to overestimates of the recovery of these populations. The history of modern whaling along the Brazilian coast is relatively well known. However, several questions relating to the pre‐modern period, during and before the nineteenth century, remain unanswered. For example, the level of exploitation of humpback whales Megaptera novaeangliae and southern right whales Eubalaena australis in this period is unknown. Pre‐modern whaling in Brazil began in 1602 and lasted until the 1920s. Whales were captured using manual harpoons from either rowing boats or sailing boats, and processed at land stations called ‘armações’. A review of the history and oil production of these stations indicates that substantial catches occurred. Pre‐modern whaling records also indicate the collapse of the southern right whale population in the western South Atlantic Ocean. Increasingly rare reports of sightings for the nineteenth century and the closing of the last armação in the breeding grounds off southern Brazil indicate that this population collapsed by 1830. Armações operating in north‐eastern Brazil remained active through the 1800s, and targeted humpback whales until modern whaling techniques were introduced in the early 1900s. It is estimated that between approximately 11000 and 32000 individuals of this species were captured at these coastal whaling stations from 1830 to 1924.

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Cetacean records along a coastal-offshore gradient in the Vitória-Trindade Chain, western South Atlantic Ocean

Cited by 22 publications

References 13 publications

Genetic differentiation between humpback whales (Megaptera novaeangliae) from Atlantic and Pacific breeding grounds of South America

Genetic differentiation between humpback whales (Megaptera novaeangliae) from Atlantic and Pacific breeding grounds of South America

Occurrence of blue whales (Balaenoptera musculus) in offshore waters of southeastern Brazil

From the southern right whale hunting decline to the humpback whaling expansion: a review of whale catch records in the tropical western South Atlantic Ocean

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