A New Application for Transponders in Population Ecology of the Common Tern

Becker, Peter; Wendeln, Helmut

doi:10.2307/1369963

Cited by 109 publications

(100 citation statements)

References 8 publications

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“…All fledglings have been ringed since 1984 and marked with passive transponders since 1992 (TROVAN ID-100 [41]); about 50 per cent of breeders carried transponders during the present study. An electronic surveillance system at the colony site with antennae on resting platforms and temporarily around nests allows reliable remote and automatic identification of transponder-marked individuals [42].…”

Section: Materials and Methods (A) Study Species And Data Collectionmentioning

confidence: 77%

Telomere length reflects phenotypic quality and costs of reproduction in a long-lived seabird

2013

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Telomere length is associated with cellular senescence, lifestyle and ageing. Short telomeres indicate poor health in humans and reduced life expectancy in several bird species, but little is known about telomeres in relation to phenotypic quality in wild animals. We investigated telomere lengths in erythrocytes of known-age common terns (Sterna hirundo), a migratory seabird, in relation to arrival date and reproductive performance. Crosssectional data revealed that, independent of age, individuals with short telomeres performed better: they arrived and reproduced earlier in the season and had more chicks in the nest. The latter effect was stronger the older the brood and stronger in males, which do most of the chick provisioning. Longitudinal data confirmed this pattern: compared with birds that lost their brood, birds that raised chicks beyond the 10th nestling day experienced higher telomere attrition from one year to the next. However, more detailed analysis revealed that the least and most successful individuals lost the fewest base pairs compared with birds with intermediate success.Our results suggest that reproductive success is achieved at the expense of telomeres, but that individual heterogeneity in susceptibility to such detrimental effects is important, as indicated by low telomere loss in the most successful birds.

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Section: Materials and Methods (A) Study Species And Data Collectionmentioning

confidence: 77%

Telomere length reflects phenotypic quality and costs of reproduction in a long-lived seabird

2013

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“…In recent PIT studies, human contact has been all but eliminated by placing scanning antennae along runways and in resting boxes (Harper & Batzli 1996;Becker & Wendeln 1997). However, it is doubtful whether a similar system to scan ferrets along trails and in dens could be used, as ferrets rarely use the same trails and dens for more than a few nights (Norbury et al 1998).…”

Section: Discussionmentioning

confidence: 99%

“…The transponders are implanted under the skin of the animal and remain inactive until read with a mini portable reader (MPR). Each transponder has a unique alphanumeric ID code, which generally remains with the animal for life (Becker & Wendeln 1997). In one study of voles, PIT tags were liable to move out through the puncture site, and a five percent loss was recorded (Harper & Batzli 1996).…”

Section: Introductionmentioning

confidence: 99%

Evaluating the performance of PIT tags and ear tags in a capture‐recapture experiment

Morley

2002

New Zealand Journal of Zoology

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Capture-recapture techniques are the most common method for gathering data on abundance and survival of mammals. A crucial assumption of all capture-recapture models is that animals do not lose their identification tags. In this study, ferrets (Mustela furo) were trapped in 16, six-day sessions over a 22-month period and tagged with both passive integrated transponders (PITs) and ear tags. Comparative population and ferret survival estimates, using records provided by both ear tags and PIT tags, were evaluated using the Jolly-Seber model to quantify any bias associated with their use. While all ferrets implanted with PIT tags were positively identified, 6% of 98 ferrets lost their ear tags, 3.5% of ear tags on 262 recapture occasions were misread, and mean ear tag retention was 86 days compared with 108 days for PIT tags. None of these differences were significant. Although the PIT tagging system provided the most accurate population estimates, PIT tags are 14 times more expensive than ear tags and, thus, the benefits of increased accuracy must be weighed against the greater economic costs. For short-term abundance and survival studies, where ear tag loss is relatively small, ear tags remain the most effective method for marking ferrets.

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“…In a colony of Common Terns Sterna hirundo in northern Germany, individual behaviour and the physiological condition of birds carrying PIT tags have been followed over many years because their presence in the colony can be recognised by an automated recording system and even their body weight can be taken when they roost on one of the poles that are connected to electronic balances (Becker & Wendeln 1997).…”

Section: Passive Integrated Transponders (Pit) Tagsmentioning

confidence: 99%

New technologies for monitoring bird migration and behaviour

Fiedler¹

2009

Ringing & Migration

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A New Application for Transponders in Population Ecology of the Common Tern

Cited by 109 publications

References 8 publications

Telomere length reflects phenotypic quality and costs of reproduction in a long-lived seabird

Telomere length reflects phenotypic quality and costs of reproduction in a long-lived seabird

Evaluating the performance of PIT tags and ear tags in a capture‐recapture experiment

New technologies for monitoring bird migration and behaviour

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