WG-CEMP-94

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Admin Admin (Secrétariat de la CCAMLR)

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Admin Admin (Secrétariat de la CCAMLR)

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Résumé:

The suggestion that sex of Adélie penguins, Pygoscelis adeliae, might be assigned by observing which member of the pair (the male) takes the first long incubation shift (Anon. 1991) was examined for each of the 1990–91, 1991–92 and 1992–93 breeding seasons. There was an 8- or 9-day period when more than 90% of the incubating birds were male and a 6- or 7-day period when more than 90% of the Read More
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Admin Admin (Secrétariat de la CCAMLR)

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Admin Admin (Secrétariat de la CCAMLR)

Publication:
Kerry, K.R., J.R. Clarke and G.D. Else. 1993. Identification of sex of Adélie penguins from observatins of incubating birds. Wildlife Research, 20(6): 725-731. https://doi.org/10.1071/WR9930725

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Admin Admin (Secrétariat de la CCAMLR)

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Mariana Cordeiro (Secrétariat de la CCAMLR)

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Admin Admin (Secrétariat de la CCAMLR)

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Résumé:

Published in Journal of Animal Ecology (1994) 63, 000-000

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Admin Admin (Secrétariat de la CCAMLR)

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Publication:
Boyd, I.L., J.P.Y. Arnould, T. Barton and J.P. Croxall. 1994. Foraging behaviour of Antarctic fur seals during periods of contrasting prey abundance. Journal of Animal Ecology, 63(3): 703-713. https://doi.org/10.2307/5235

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Résumé:

Published in J. exp. Biol. 000: 000-000 (1994)

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Admin Admin (Secrétariat de la CCAMLR)

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Publication:
Bevan, R.M., A.J. Woakes, P.J. Butler and I.L. Boyd. 1994. The use of heart rate to estimate oxygen consumption of free-ranging black-browed albatrosses Diomedia melanophrys. J. Exp. Biol., 193(1): 119-137. https://doi.org/10.1242/jeb.193.1.119

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Résumé:

The diet of the white-chinned petrel at Bird Island, South Georgia was studied during the chick-rearing period in 1986 by quantitative analysis (by weight, frequency of occurrence and number of individuals) of regurgitated or lavaged adult stomach contents. Antarctic krill was the most important constituent of the diet, comprising over 90% of prey items and forming 47% of the diet by weight; Read More
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Résumé:

Interannual variation in aspects of the breeding biology of Antarctic prions was studied for three summers (1989–1992) at Bird island, South Georgia. Egg size, mass and incubation period remained constant. Laying, hatching and fledging were significantly delayed and less synchronous in 1991/92 (range of laying dates 51 days compared to 10–15 days in the two other seasons). This was due to an Read More
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Admin Admin (Secrétariat de la CCAMLR)

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Admin Admin (Secrétariat de la CCAMLR)

Publication:
Liddle, G.M. 1994. Interannual variation in the breeding biology of the Antarctic prion Pachyptila desolata at Bird Island, South Georgia. J. Zool. Lond., 234(1): 125-139. https://doi.org/10.1111/j.1469-7998.1994.tb06060.x

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Résumé:

Indices of predator reproductive status are calculated for CEMP parameters such as adult weight on arrival at breeding colony, duration of foraging trips, breeding population size and success, chick weight and diet, and fur seal pup growth rates (Methods A1-A9, Bl-B2 and C1-C2) using data held at the CCAMLR Data Centre. Preliminary statistical and graphical analyses of the trends shown by Read More
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Admin Admin (Secrétariat de la CCAMLR)

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Admin Admin (Secrétariat de la CCAMLR)

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Admin Admin (Secrétariat de la CCAMLR)

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Admin Admin (Secrétariat de la CCAMLR)

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Admin Admin (Secrétariat de la CCAMLR)

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Admin Admin (Secrétariat de la CCAMLR)

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Admin Admin (Secrétariat de la CCAMLR)

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Admin Admin (Secrétariat de la CCAMLR)

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Admin Admin (Secrétariat de la CCAMLR)

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Résumé:

Observations of nesting Adélie Penguins (Pygoscelis adeliae) were made at Ardley Island during spring 1990 when snow cover was unusually thick at some subcolony sites. Adélie Penguins at these sites had to delay egg laying until the snow melted. Maximum length of fasting periods comprising pre-breeding and incubation was 50 days. Long fasting seemed to have no detrimental effect on breeding. Read More
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Admin Admin (Secrétariat de la CCAMLR)

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Publication:
Ulbricht, J. and D. Zippel. 1994. Delayed laying and prolonged fasting in Adelie penguins Pygoscelis adeliae. Polar Biol., 14: 215-217. https://doi.org/10.1007/BF00240527

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Résumé:

Discriminant analysis can use morphometric differences between known male and female birds to predict the sex of unknown individuals in field studies. Geographic variation in size and shape often limits the predictive value of a discriminant function to the population from which it was derived. Specific discriminant functions for populations of five species of fulmarine petrels (Northern Read More
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Admin Admin (Secrétariat de la CCAMLR)

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Admin Admin (Secrétariat de la CCAMLR)

Publication:
van Franeker, J.A. and C.J.F. ter Braak. 1993. A generalized discriminant for sexing fulmarine petrels from external measurements. The Auk, 110(3): 492-502. https://doi.org/10.2307/4088413

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Résumé:

We applied discriminant analysis to morphometric data from Chinstrap Penguins (Pygoscelis antarctica) to obtain a function that can be used to predict sex. The function correctly classified 95% of 55 individuals. Bill depth was the most important discriminating variable, with males having deeper bills.

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Admin Admin (Secrétariat de la CCAMLR)

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Publication:
Amat, J.A., J. Viñuela and M. Ferrer. 1993. Sexing chinstrap penguins (Pygoscelis antarctica) by morphological measurements. Colonial Waterbirds, 16(2): 213-216. https://doi.org/10.2307/1521441

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Résumé:

Water temperature and krill abundance in Maxwell Bay, Antarctica, were examined using Pygoscelid penguins carrying appropriate sensors linked to position-determining devices. Fifty-three foraging trips from 49 penguins indicated that during December 1991 and January 1992 the temperature in the top 100 m of the water column was highest in the western section of the Bay which concurred with Read More
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Admin Admin (Secrétariat de la CCAMLR)

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Publication:
Wilson, R.P., B.M. Culik, R. Bannasch and J. Lage. 1994. Monitoring Antarctic environmental variables using penguins. Mar. Ecol. Prog. Ser., 106: 199-202.

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Résumé:

Local fish species were used to feed a captive blue-eyed shag Phalacrocorax atriceps bransfieldensis during 45 days of the austral summer at Jubany Station, King George Island, South Shetland Islands. The otoliths identified in pellets were affected by the digestive process and consequently the fish species were differentialy underrepresented in number and size (length/mass). Except Read More
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Admin Admin (Secrétariat de la CCAMLR)

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María Mercedes Santos (Argentina)

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Résumé:

Forty stomach contents of the blue eyed shag Phalacrocorax bransfieldensis were sampled at Nelson Island, South Shetland Islands, in January 1994. The analysis of the diet showed that fish were by far the main component, followed by octopods, polychaetes and gammarids. Notothenia coriiceps, predominated in frequency (58%) and in weight (65%), whereas Nototheniops nudifrons was the most Read More
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María Mercedes Santos (Argentina)

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Résumé:

Thirty eight regurgitated casts collected in a colony at Half-moon Island, South Shetland Islands, during January and February 1993, were analyzed to determine the importance of fish in the diet of the blue-eyed shag Phalacrocorax atriceps bransfieldensis. Fish species were identified by means of otoliths found in the casts. The size and weight of the fish were estimated from the otolith Read More
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Admin Admin (Secrétariat de la CCAMLR)

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María Mercedes Santos (Argentina)

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Résumé:

This paper draws attention to the possible implications for the CCAMLR Ecosystem Monitoring Program (CEMP) of infectious and parasitic disease among penguin being monitored and to this end present a summary of all such diseases of penguin species found in the Antarctic and sub-Antarctic. Haematological and biochemical values for healthy penguins which may be of use in diagnosis are presented Read More
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Admin Admin (Secrétariat de la CCAMLR)

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Résumé:

The study of diseases in wild penguins is important for the identification of endemic diseases and the detection of exotic diseases should these occur. It is also important in the understanding of the degree to which disease may be expected to influence the results of biological studies. Results may be confounded and interpretation made difficult by both the transient and long term presence of Read More
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Admin Admin (Secrétariat de la CCAMLR)

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Admin Admin (Secrétariat de la CCAMLR)

Publication:
Clarke, J. and K. Kerry. 1993. Diseases and parasites of penguins. Korean Journal of Polar Research, 4(2): 79-96.

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Admin Admin (Secrétariat de la CCAMLR)

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Résumé:

We present data on sexual dimorphism in some morphological measurements (wing length, head length, bill depth and bill length) in the Antarctic Petrel Thalassoica antarctica. Males were on average larger than females for all measurements. Sexual dimorphism was on average largest for bill depths whereas wing lengths discriminated least between the sexes. A discriminant function including bill Read More
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Admin Admin (Secrétariat de la CCAMLR)

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Admin Admin (Secrétariat de la CCAMLR)

Publication:
Lorentsen, S.-H. and N. Røv. 1994. Sex determination of Antarctic petrels Thalassoica antarctica by discriminant analysis of morphometric characters. Polar Biol., 14: 143-145. https://doi.org/10.1007/BF00234977

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