Comportamento alimentar parasita de gaivotas (Larus dominicanus) em baleias Franca-Austrais (Eubalaena australis) na Península Valdés, Argentina
Southern Right Whales (Eubalaena australis) were close to extinction in the 20th century, however, after protective measures, their numbers began to rise, contributing to the stability of the population. Seagulls and whales have always had a commensalist association, where the former fed on cyamids...
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Universidade Federal de Juiz de Fora (UFJF)
2023
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Online Access: | https://repositorio.ufjf.br/jspui/handle/ufjf/15232 |
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ftunivfjf:oai:hermes.cpd.ufjf.br:ufjf/15232 2023-05-15T18:26:18+02:00 Comportamento alimentar parasita de gaivotas (Larus dominicanus) em baleias Franca-Austrais (Eubalaena australis) na Península Valdés, Argentina Silva, Rebecca Mcauchar e Rocha, Ana Paula Machado da http://lattes.cnpq.br/4232426481631611 Rossi, Mariana Fonseca http://lattes.cnpq.br/6721563740815535 Lopes, Juliane Floriano Santos http://lattes.cnpq.br/8623248746870513 2023-01-13 application/pdf https://repositorio.ufjf.br/jspui/handle/ufjf/15232 por por Universidade Federal de Juiz de Fora (UFJF) Brasil ICB – Instituto de Ciências Biológicas UFJF https://repositorio.ufjf.br/jspui/handle/ufjf/15232 Acesso Aberto http://creativecommons.org/licenses/by-sa/3.0/br/ Ataque de gaivotas Molestamento por gaivotas Interação entre aves e cetáceos Baleia Franca-Austral Seagulls attack Harassment by seagulls Interaction between birds and cetaceans Southern Right Whale CNPQ::CIENCIAS BIOLOGICAS::ZOOLOGIA::COMPORTAMENTO ANIMAL Trabalho de Conclusão de Curso 2023 ftunivfjf 2023-03-25T21:13:34Z Southern Right Whales (Eubalaena australis) were close to extinction in the 20th century, however, after protective measures, their numbers began to rise, contributing to the stability of the population. Seagulls and whales have always had a commensalist association, where the former fed on cyamids that colonize the natural calluses present in these. However, in 1972 a change in the interaction between both species was observed. Seagulls (Laurus dominicanus) started to have a predatory behavior in relation to whales, pecking and injuring the loins of females and their young, which changed their behavior. Trying to mitigate the damage caused by these attacks, the government of Puerto Madryn, Chubut, Argentina, carried out a sanitary extermination of attacking gulls in 2012 and the closure of the open-air dump in 2015(EL DIARIO DE MADRYN, 2014). It was seen that the attacks did not decrease, probably because the attacking gulls were replaced by others. This created a gap regarding the outcome of this measure and the persistent occurrence of attack interactions. Thus, the objective of this work was to evaluate whether the rates of attacks by seagulls on whales increased after the extermination during the 2021 season. Data were collected from July to November 2021, using a 20- 60X. The sweeping and animal focal methodology was applied (ALTMANN, 1974) 2262 attacks were recorded, on 4735 whales, in a total of 95 hours and 37 minutes of observation. Puppies had a higher frequency of attacks (n=1699) compared to adults (n=563; p< 0.001). The attack rate was higher in July and August (84 and 70 attacks/hour, respectively) compared to September and October (22 and 15 attacks/hour). The percentage of attacks was higher than in previous years (53.3% in 2021, compared to 21.66% in 2005, 17.19% in 2006, 18.78% in 2007 and 30.03% in 2008). Between 2005 and 2008, 51.8% of attacks were on mothers with puppies and in 2021, 75.1% of them were directed at puppies. In this way, the data show that the decrease in the larus ... Other/Unknown Material Southern Right Whale Repositório Institucional da UFJF (Ri-UFJF, Universidade Federal De Juiz De Fora) Argentina Austral Chubut ENVELOPE(-62.533,-62.533,-76.100,-76.100) |
institution |
Open Polar |
collection |
Repositório Institucional da UFJF (Ri-UFJF, Universidade Federal De Juiz De Fora) |
op_collection_id |
ftunivfjf |
language |
Portuguese |
topic |
Ataque de gaivotas Molestamento por gaivotas Interação entre aves e cetáceos Baleia Franca-Austral Seagulls attack Harassment by seagulls Interaction between birds and cetaceans Southern Right Whale CNPQ::CIENCIAS BIOLOGICAS::ZOOLOGIA::COMPORTAMENTO ANIMAL |
spellingShingle |
Ataque de gaivotas Molestamento por gaivotas Interação entre aves e cetáceos Baleia Franca-Austral Seagulls attack Harassment by seagulls Interaction between birds and cetaceans Southern Right Whale CNPQ::CIENCIAS BIOLOGICAS::ZOOLOGIA::COMPORTAMENTO ANIMAL Silva, Rebecca Mcauchar e Comportamento alimentar parasita de gaivotas (Larus dominicanus) em baleias Franca-Austrais (Eubalaena australis) na Península Valdés, Argentina |
topic_facet |
Ataque de gaivotas Molestamento por gaivotas Interação entre aves e cetáceos Baleia Franca-Austral Seagulls attack Harassment by seagulls Interaction between birds and cetaceans Southern Right Whale CNPQ::CIENCIAS BIOLOGICAS::ZOOLOGIA::COMPORTAMENTO ANIMAL |
description |
Southern Right Whales (Eubalaena australis) were close to extinction in the 20th century, however, after protective measures, their numbers began to rise, contributing to the stability of the population. Seagulls and whales have always had a commensalist association, where the former fed on cyamids that colonize the natural calluses present in these. However, in 1972 a change in the interaction between both species was observed. Seagulls (Laurus dominicanus) started to have a predatory behavior in relation to whales, pecking and injuring the loins of females and their young, which changed their behavior. Trying to mitigate the damage caused by these attacks, the government of Puerto Madryn, Chubut, Argentina, carried out a sanitary extermination of attacking gulls in 2012 and the closure of the open-air dump in 2015(EL DIARIO DE MADRYN, 2014). It was seen that the attacks did not decrease, probably because the attacking gulls were replaced by others. This created a gap regarding the outcome of this measure and the persistent occurrence of attack interactions. Thus, the objective of this work was to evaluate whether the rates of attacks by seagulls on whales increased after the extermination during the 2021 season. Data were collected from July to November 2021, using a 20- 60X. The sweeping and animal focal methodology was applied (ALTMANN, 1974) 2262 attacks were recorded, on 4735 whales, in a total of 95 hours and 37 minutes of observation. Puppies had a higher frequency of attacks (n=1699) compared to adults (n=563; p< 0.001). The attack rate was higher in July and August (84 and 70 attacks/hour, respectively) compared to September and October (22 and 15 attacks/hour). The percentage of attacks was higher than in previous years (53.3% in 2021, compared to 21.66% in 2005, 17.19% in 2006, 18.78% in 2007 and 30.03% in 2008). Between 2005 and 2008, 51.8% of attacks were on mothers with puppies and in 2021, 75.1% of them were directed at puppies. In this way, the data show that the decrease in the larus ... |
author2 |
Rocha, Ana Paula Machado da http://lattes.cnpq.br/4232426481631611 Rossi, Mariana Fonseca http://lattes.cnpq.br/6721563740815535 Lopes, Juliane Floriano Santos http://lattes.cnpq.br/8623248746870513 |
format |
Other/Unknown Material |
author |
Silva, Rebecca Mcauchar e |
author_facet |
Silva, Rebecca Mcauchar e |
author_sort |
Silva, Rebecca Mcauchar e |
title |
Comportamento alimentar parasita de gaivotas (Larus dominicanus) em baleias Franca-Austrais (Eubalaena australis) na Península Valdés, Argentina |
title_short |
Comportamento alimentar parasita de gaivotas (Larus dominicanus) em baleias Franca-Austrais (Eubalaena australis) na Península Valdés, Argentina |
title_full |
Comportamento alimentar parasita de gaivotas (Larus dominicanus) em baleias Franca-Austrais (Eubalaena australis) na Península Valdés, Argentina |
title_fullStr |
Comportamento alimentar parasita de gaivotas (Larus dominicanus) em baleias Franca-Austrais (Eubalaena australis) na Península Valdés, Argentina |
title_full_unstemmed |
Comportamento alimentar parasita de gaivotas (Larus dominicanus) em baleias Franca-Austrais (Eubalaena australis) na Península Valdés, Argentina |
title_sort |
comportamento alimentar parasita de gaivotas (larus dominicanus) em baleias franca-austrais (eubalaena australis) na península valdés, argentina |
publisher |
Universidade Federal de Juiz de Fora (UFJF) |
publishDate |
2023 |
url |
https://repositorio.ufjf.br/jspui/handle/ufjf/15232 |
long_lat |
ENVELOPE(-62.533,-62.533,-76.100,-76.100) |
geographic |
Argentina Austral Chubut |
geographic_facet |
Argentina Austral Chubut |
genre |
Southern Right Whale |
genre_facet |
Southern Right Whale |
op_relation |
https://repositorio.ufjf.br/jspui/handle/ufjf/15232 |
op_rights |
Acesso Aberto http://creativecommons.org/licenses/by-sa/3.0/br/ |
_version_ |
1766208252136128512 |