Parathion causes secondary poisoning in a laughing gull breeding colony

1979 ◽  
Vol 23 (1) ◽  
pp. 281-284 ◽  
Author(s):  
Donald H. White ◽  
Kirke A. King ◽  
Christine A. Mitchell ◽  
Ellwood F. Hill ◽  
Thair G. Lamont
Keyword(s):  
Secondary Poisoning ◽  
Breeding Colony

Blood catalase and haematocrit values in a breeding colony of Dutch-belted rabbits

2001 ◽  
Vol 35 (2) ◽  
pp. 140-146 ◽  
Author(s):  
R. H. Foote ◽  
E. Hare
Keyword(s):  
Genetic Correlation ◽  
Seminal Plasma ◽  
Catalase Activity ◽  
Preliminary Evidence ◽  
Age Effect ◽  
Breeding Colony ◽  
First Report ◽  
Rabbit Blood ◽  
Different Ages ◽  
Males And Females

Rabbit seminal plasma catalase is much higher than in the semen of other mammals, and differences appear to be inherited. Because of the scarcity of information on rabbit blood catalase and haematocrit in Dutch-belted rabbits, an investigation of possible effects of gender, age and genetics on these variables was undertaken. There were 191 rabbits sampled at 2-3 months, 130 at 12 months and 61 at 18-24 months of age. There was no age effect on the haematocrit values and on blood catalase activity. At 12 months of age males had an average haematocrit value of 44% compared with 40% for females ( P < 0.05). Corresponding average catalase values were 431 and 356 units/ml of blood ( P < 0.05). Also catalase was measured in the semen and blood of 34 males, and males differed in both their blood and semen catalase activity ( P < 0.05). The correlation between the two traits was r = 0.44. Heritability ( h2) estimates, based on 231 rabbits were 0.40 for blood catalase activity, and 0.26 for haematocrit. The genetic correlation between the two variables was 0.83 ( P < 0.05). These studies are consistent with the literature in that female rabbits have a slightly lower haematocrit value than males, and this is associated with a lower catalase activity. This appears to be the first report of a study that compares rabbit blood catalase in males and females of different ages. Preliminary evidence that differences may have a heritable basis is consistent with previous studies on rabbit semen catalase.

Home range and landscape use by a marabou stork and the breeding success of Africa's most southerly breeding colony

2021 ◽  
Author(s):  
David A. Ehlers Smith ◽  
Brent Coverdale ◽  
Ben Hoffman ◽  
Christopher Kelly ◽  
Yvette C. Ehlers Smith ◽  
...  
Keyword(s):  
Home Range ◽  
Breeding Success ◽  
Breeding Colony ◽  
Landscape Use ◽  
Marabou Stork

Vital Statistics from a Breeding Colony

1972 ◽  
Vol 1 (1) ◽  
pp. 3-28 ◽  
Author(s):  
G. Van Wagenen
Keyword(s):  
Vital Statistics ◽  
Breeding Colony

Long-term data indicates that supplementary food enhances the number of breeding pairs in a Cape Vulture Gyps coprotheres colony

2016 ◽  
Vol 27 (1) ◽  
pp. 140-152 ◽  
Author(s):  
DANA G. SCHABO ◽  
SONJA HEUNER ◽  
MICHAEL V. NEETHLING ◽  
SASCHA RÖSNER ◽  
ROGER UYS ◽  
...  
Keyword(s):  
Population Dynamics ◽  
Breeding Success ◽  
Food Sources ◽  
Breeding Colony ◽  
Supplementary Food ◽  
Adequate Food ◽  
Vulture Conservation ◽  
Positive Effect ◽  
Term Data

SummaryThe number of vultures is declining in many parts of the world due to numerous threats, such as poisoning and collisions with power-lines as well as the lack of adequate food sources. Vulture restaurants, i.e. supplementary feeding stations, have become a widespread conservation tool aimed at supporting vulture colonies. However, it is poorly understood how vulture restaurants influence population dynamics and whether they affect breeding success of vulture populations. We used a 12-year dataset from a breeding colony of the Cape Vulture Gyps coprotheres and a nearby vulture restaurant in South Africa to investigate the effect of supplementary food on population dynamics and breeding success. We found a significantly positive effect of supplementary food during the nest-building stage on the number of breeding pairs. However, breeding success, i.e. the proportion of successful nests, did not depend on supplementary food during the incubation and rearing stage. Especially during the critical rearing stage, the amount of food supplied might not have been sufficient to meet food demands of the colony. Still, our results indicate that carefully managed vulture restaurants might stabilise vulture colonies and can therefore aid vulture conservation.

Impact of the Potholes Reservoir Caspian Tern Breeding Colony on Out-Migrating Juvenile Salmonids in the Mid-Columbia River

2010 ◽  
Vol 139 (2) ◽  
pp. 362-381 ◽  
Author(s):  
Christina J. Maranto ◽  
Thomas P. Good ◽  
Francis K. Wiese ◽  
Julia K. Parrish
Keyword(s):  
Columbia River ◽  
Breeding Colony ◽  
Juvenile Salmonids ◽  
Caspian Tern

OBSERVATIONS ON A SUCCESSFUL BREEDING COLONY OF THE MARMOSET, OEDIPOMIDAS OEDIPUS

1966 ◽  
Vol 4 (4) ◽  
pp. 265-287 ◽  
Author(s):  
J.K. Hampton, Jr ◽  
Suzanne H. Hampton ◽  
Barbara T. Landwehr
Keyword(s):  
Breeding Colony

Spontaneous familial systemic lupus erythematosus in a canine breeding colony

1988 ◽  
Vol 98 (1) ◽  
pp. 81-89 ◽  
Author(s):  
B. Hubert ◽  
M. Teichner ◽  
C. Fournel ◽  
J.C. Monier
Keyword(s):  
Systemic Lupus Erythematosus ◽  
Lupus Erythematosus ◽  
Systemic Lupus ◽  
Breeding Colony

scholarly journals Foraging behavior and at-sea distribution of White-Tailed Tropicbirds in tropical ocean

2017 ◽  
Vol 78 (3) ◽  
pp. 556-563 ◽  
Author(s):  
L. F. A. S. Campos ◽  
A. B. Andrade ◽  
S. Bertrand ◽  
M. A. Efe
Keyword(s):  
Endangered Species ◽  
Foraging Behavior ◽  
Mortality Rates ◽  
Nest Attendance ◽  
Breeding Colony ◽  
Tropical Ocean ◽  
Foraging Patterns ◽  
Land Crab ◽  
Egg Consumption ◽  
Foraging Pattern

Abstract We used miniaturized GPS loggers and site observations to access foraging patterns and nest behaviour of the White-tailed Tropicbird Phaethon lepturus (WTTB), an endangered species at its South Atlantic breeding colony. Dual foraging pattern was observed with alternation between long and short foraging trips. Birds responsible for nest attendance engaged in short foraging trips with mean distance from colony of 25 ± 17 km, total distance covered of 79 ± 65 km and mean duration of 4.02 ± 5.28 hours. Birds flew by dawn and returned before dusk while partners were at sea for long foraging trips that ranged from four to 11 days, with mean maximum distance from colony of 105 ± 47.48 km. Chicks were usually left alone for hours and chick predation by Land Crab Johngartia lagostroma, egg consumption by Goniopsis cruentata and intra-specific competition are suspected to be responsible for high chick mortality rates.

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