Data

Environmental determinants of fecundity and pup growth in fur seals

Australian Antarctic Data Centre
GOLDSWORTHY, SIMON
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ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=info:doi10.26179/5d2e8725bb2d5&rft.title=Environmental determinants of fecundity and pup growth in fur seals&rft.identifier=10.26179/5d2e8725bb2d5&rft.publisher=Australian Antarctic Data Centre&rft.description=This indicator is no longer maintained, and is considered OBSOLETE. INDICATOR DEFINITION The fecundity (pupping rates) of female fur seals and the growth rates of their pups relative to changes in sea surface temperatures (local primary production) in the vicinity of Macquarie Island. TYPE OF INDICATOR There are three types of indicators used in this report: 1.Describes the CONDITION of important elements of a system; 2.Show the extent of the major PRESSURES exerted on a system; 3.Determine RESPONSES to either condition or changes in the condition of a system. This indicator is one of: CONDITION RATIONALE FOR INDICATOR SELECTION A highly negative correlation has been detected between sea surface temperatures in the vicinity of Macquarie Island and fur seal fecundity and pup growth. A dataset of over ten years has shown that autumn sea-surface temperatures are highly negatively correlated with female fecundity in the following breeding season. Rather than the reproductive success in terms of fecundity and pup growth being seen simply as a correlate of SST and presumably ocean productivity, the measure is much more than this. What the dataset from the Macquarie Island fur seal populations is rather more unique, in that they indicate how environmental variability effects the reproductive success of animals at annual and lifetime scales. This is especially important as we can now show what impacts environmental/climatic phenomena such as the Antarctic Circumpolar Wave, and global warming will have on fur seals, and how changes in the environment may impact on the viability of populations. In this situation, the data clearly suggest that warmer ocean temperatures significantly effect the reproductive success of fur seals. Sustained warmer temperatures would therefore impose demographic constraints on populations. DESIGN AND STRATEGY FOR INDICATOR MONITORING PROGRAM Spatial scale: SST data are obtained from a 1 degree square just north of the island that represents the region in which most females obtain food throughout their lactation period. Frequency: Data on the reproductive success of fur seals is to be collected annually. Measurement technique: Each breeding season (November-January), the reproductive success of tagged females is monitored, including their pupping success, and the growth rates of their pups. RESEARCH ISSUES LINKS TO OTHER INDICATORS&rft.creator=GOLDSWORTHY, SIMON &rft.date=2001&rft.coverage=northlimit=-54.47882; southlimit=-54.78327; westlimit=158.76343; eastLimit=158.9653; projection=WGS84&rft.coverage=northlimit=-54.47882; southlimit=-54.78327; westlimit=158.76343; eastLimit=158.9653; projection=WGS84&rft_rights=This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=SOE_fur_seals when using these data.&rft_subject=biota&rft_subject=oceans&rft_subject=SEA SURFACE TEMPERATURE&rft_subject=EARTH SCIENCE&rft_subject=OCEANS&rft_subject=OCEAN TEMPERATURE&rft_subject=ANIMALS/VERTEBRATES&rft_subject=BIOLOGICAL CLASSIFICATION&rft_subject=MAMMALS&rft_subject=CHLOROPHYLL&rft_subject=OCEAN CHEMISTRY&rft_subject=PIGMENTS&rft_subject=POPULATION DYNAMICS&rft_subject=BIOSPHERE&rft_subject=ECOLOGICAL DYNAMICS&rft_subject=SPECIES/POPULATION INTERACTIONS&rft_subject=PRIMARY PRODUCTION&rft_subject=ECOSYSTEM FUNCTIONS&rft_subject=CLIMATE CHANGE&rft_subject=FECUNDITY&rft_subject=FUR SEALS&rft_subject=GLOBAL WARMING&rft_subject=VISUAL OBSERVATIONS&rft_subject=FIELD SURVEYS&rft_subject=OCEAN > SOUTHERN OCEAN&rft_subject=OCEAN > SOUTHERN OCEAN > MACQUARIE ISLAND&rft_subject=GEOGRAPHIC REGION > POLAR&rft_place=Hobart&rft.type=dataset&rft.language=English Access the data
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This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=SOE_fur_seals when using these data.

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Brief description

This indicator is no longer maintained, and is considered OBSOLETE. INDICATOR DEFINITION The fecundity (pupping rates) of female fur seals and the growth rates of their pups relative to changes in sea surface temperatures (local primary production) in the vicinity of Macquarie Island. TYPE OF INDICATOR There are three types of indicators used in this report: 1.Describes the CONDITION of important elements of a system; 2.Show the extent of the major PRESSURES exerted on a system; 3.Determine RESPONSES to either condition or changes in the condition of a system. This indicator is one of: CONDITION RATIONALE FOR INDICATOR SELECTION A highly negative correlation has been detected between sea surface temperatures in the vicinity of Macquarie Island and fur seal fecundity and pup growth. A dataset of over ten years has shown that autumn sea-surface temperatures are highly negatively correlated with female fecundity in the following breeding season. Rather than the reproductive success in terms of fecundity and pup growth being seen simply as a correlate of SST and presumably ocean productivity, the measure is much more than this. What the dataset from the Macquarie Island fur seal populations is rather more unique, in that they indicate how environmental variability effects the reproductive success of animals at annual and lifetime scales. This is especially important as we can now show what impacts environmental/climatic phenomena such as the Antarctic Circumpolar Wave, and global warming will have on fur seals, and how changes in the environment may impact on the viability of populations. In this situation, the data clearly suggest that warmer ocean temperatures significantly effect the reproductive success of fur seals. Sustained warmer temperatures would therefore impose demographic constraints on populations. DESIGN AND STRATEGY FOR INDICATOR MONITORING PROGRAM Spatial scale: SST data are obtained from a 1 degree square just north of the island that represents the region in which most females obtain food throughout their lactation period. Frequency: Data on the reproductive success of fur seals is to be collected annually. Measurement technique: Each breeding season (November-January), the reproductive success of tagged females is monitored, including their pupping success, and the growth rates of their pups. RESEARCH ISSUES LINKS TO OTHER INDICATORS

Issued: 2001-06-26

Data time period: 1990-01-01 to 1999-12-31

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158.9653,-54.47882 158.9653,-54.78327 158.76343,-54.78327 158.76343,-54.47882 158.9653,-54.47882

158.864365,-54.631045

text: northlimit=-54.47882; southlimit=-54.78327; westlimit=158.76343; eastLimit=158.9653; projection=WGS84

Subjects
ANIMALS/VERTEBRATES | BIOLOGICAL CLASSIFICATION | BIOSPHERE | CHLOROPHYLL | CLIMATE CHANGE | EARTH SCIENCE | ECOLOGICAL DYNAMICS | ECOSYSTEM FUNCTIONS | FECUNDITY | FIELD SURVEYS | FUR SEALS | GEOGRAPHIC REGION > POLAR | GLOBAL WARMING | MAMMALS | OCEAN > SOUTHERN OCEAN | OCEAN > SOUTHERN OCEAN > MACQUARIE ISLAND | OCEAN CHEMISTRY | OCEAN TEMPERATURE | OCEANS | PIGMENTS | POPULATION DYNAMICS | PRIMARY PRODUCTION | SEA SURFACE TEMPERATURE | SPECIES/POPULATION INTERACTIONS | VISUAL OBSERVATIONS | biota | oceans |

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AU-ANL:PEAU : http://nla.gov.au/nla.party-617536

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