Movements and foraging strategies of juveniles procellariiformes during their first months of independence
The juvenile stage of animals is often much of a mystery to scientists. Moreover, juvenile survival is known to be a strong determinant for the future of a population. Indeed, juvenile animals are known to face high mortality during the first months after independence, with survival rates improving...
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fttriple:oai:gotriple.eu:10670/1.c7qfv4 2023-05-15T18:25:22+02:00 Movements and foraging strategies of juveniles procellariiformes during their first months of independence Où va la jeunesse ? Mouvements et quête alimentaire des juvéniles de procellariiformes durant leur première année en mer Jeudi de Grissac, Sophie La Rochelle Weimerskirch, Henri 2016-10-11 http://www.theses.fr/2016LAROS016/document fr fre 10670/1.c7qfv4 http://www.theses.fr/2016LAROS016/document other Theses.fr Oiseaux marins Albatros Pétrels Écologie Stratégie Comportement Océan Austral Début de vie Seabirds Ecology Strategy Behaviour Southern Ocean Early life envir geo Thesis https://vocabularies.coar-repositories.org/resource_types/c_46ec/ 2016 fttriple 2023-01-22T17:21:47Z The juvenile stage of animals is often much of a mystery to scientists. Moreover, juvenile survival is known to be a strong determinant for the future of a population. Indeed, juvenile animals are known to face high mortality during the first months after independence, with survival rates improving with age. One ultimate hypothesis implies that juveniles have a lower survival rate than adults because of their lack of experience. Thus they are initially poor foragers and require a learning period (immaturity) to improve their efficiency before being able to bear breeding and its associated energetic costs. Proximal factors also influence juvenile survival, such as environmental fluctuations and competition. Studies on terrestrial animals have provided useful information thanks to the possibility of direct observation and, recently, bio-logging technologies. However, collecting data in the marine environment is more difficult, particularly when juveniles are concerned. Long-lived marine species such as seabirds have an extensive immature period extending from a few years up to more than ten years. The offspring of these species will usually leave their natal site and disperse at sea for several years before returning to breed on land, most of the time at their place of birth. This makes it difficult to obtain direct observations, and so documenting their first journey at sea to learn more about their behavioural and foraging ecology is a challenge. In this context, this PhD aims to unravel at least part of the mystery of juvenile seabirds’ early life by investigating the first months at sea of newly fledged individuals from several long-lived species of procellariiformes. Using state of the art advancements in biotelemetry, I was able to follow, at sea, by satellite a large set of juveniles from nine closely related species of albatross and petrel breeding in the French Southern Territories of the Southern Ocean : Crozet, Kerguelen and Amsterdam Islands. Some of these species had never been tracked before. ... Thesis Southern Ocean Unknown Austral Kerguelen Pétrels ENVELOPE(140.017,140.017,-66.667,-66.667) Southern Ocean |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
French |
topic |
Oiseaux marins Albatros Pétrels Écologie Stratégie Comportement Océan Austral Début de vie Seabirds Ecology Strategy Behaviour Southern Ocean Early life envir geo |
spellingShingle |
Oiseaux marins Albatros Pétrels Écologie Stratégie Comportement Océan Austral Début de vie Seabirds Ecology Strategy Behaviour Southern Ocean Early life envir geo Jeudi de Grissac, Sophie Movements and foraging strategies of juveniles procellariiformes during their first months of independence |
topic_facet |
Oiseaux marins Albatros Pétrels Écologie Stratégie Comportement Océan Austral Début de vie Seabirds Ecology Strategy Behaviour Southern Ocean Early life envir geo |
description |
The juvenile stage of animals is often much of a mystery to scientists. Moreover, juvenile survival is known to be a strong determinant for the future of a population. Indeed, juvenile animals are known to face high mortality during the first months after independence, with survival rates improving with age. One ultimate hypothesis implies that juveniles have a lower survival rate than adults because of their lack of experience. Thus they are initially poor foragers and require a learning period (immaturity) to improve their efficiency before being able to bear breeding and its associated energetic costs. Proximal factors also influence juvenile survival, such as environmental fluctuations and competition. Studies on terrestrial animals have provided useful information thanks to the possibility of direct observation and, recently, bio-logging technologies. However, collecting data in the marine environment is more difficult, particularly when juveniles are concerned. Long-lived marine species such as seabirds have an extensive immature period extending from a few years up to more than ten years. The offspring of these species will usually leave their natal site and disperse at sea for several years before returning to breed on land, most of the time at their place of birth. This makes it difficult to obtain direct observations, and so documenting their first journey at sea to learn more about their behavioural and foraging ecology is a challenge. In this context, this PhD aims to unravel at least part of the mystery of juvenile seabirds’ early life by investigating the first months at sea of newly fledged individuals from several long-lived species of procellariiformes. Using state of the art advancements in biotelemetry, I was able to follow, at sea, by satellite a large set of juveniles from nine closely related species of albatross and petrel breeding in the French Southern Territories of the Southern Ocean : Crozet, Kerguelen and Amsterdam Islands. Some of these species had never been tracked before. ... |
author2 |
La Rochelle Weimerskirch, Henri |
format |
Thesis |
author |
Jeudi de Grissac, Sophie |
author_facet |
Jeudi de Grissac, Sophie |
author_sort |
Jeudi de Grissac, Sophie |
title |
Movements and foraging strategies of juveniles procellariiformes during their first months of independence |
title_short |
Movements and foraging strategies of juveniles procellariiformes during their first months of independence |
title_full |
Movements and foraging strategies of juveniles procellariiformes during their first months of independence |
title_fullStr |
Movements and foraging strategies of juveniles procellariiformes during their first months of independence |
title_full_unstemmed |
Movements and foraging strategies of juveniles procellariiformes during their first months of independence |
title_sort |
movements and foraging strategies of juveniles procellariiformes during their first months of independence |
publishDate |
2016 |
url |
http://www.theses.fr/2016LAROS016/document |
long_lat |
ENVELOPE(140.017,140.017,-66.667,-66.667) |
geographic |
Austral Kerguelen Pétrels Southern Ocean |
geographic_facet |
Austral Kerguelen Pétrels Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Theses.fr |
op_relation |
10670/1.c7qfv4 http://www.theses.fr/2016LAROS016/document |
op_rights |
other |
_version_ |
1766206784473661440 |