Reproductive performance of the New Zealand flatworm Arthurdendyus triangulatus in earthworm species-poor and -rich habitats at Benmore, Scotland

Pedobiologia ◽  
2005 ◽  
Vol 49 (5) ◽  
pp. 455-465 ◽  
Author(s):  
Ole M. Christensen ◽  
Janice G. Mather
Keyword(s):  
New Zealand ◽  
Reproductive Performance ◽  
Earthworm Species ◽  
Arthurdendyus Triangulatus

scholarly journals Housing Rabbit Does in a Combi System with Removable Walls: Effect on Behaviour and Reproductive Performance

Animals ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 528 ◽  
Author(s):  
Alessandro Dal Bosco ◽  
Cecilia Mugnai ◽  
Melania Martino ◽  
Zsolt Szendrő ◽  
Simona Mattioli ◽  
...  
Keyword(s):  
New Zealand ◽  
Reproductive Performance ◽  
Reproductive Traits ◽  
Sexual Receptivity ◽  
Control Group ◽  
Productive Performance ◽  
Fertility Rates ◽  
Skin Injuries ◽  
Individual Cage ◽  
Different Parts

We evaluated the effects of two types of colony cages, in which rabbit does were always in a group (C1), and where they were in combi cages furnished with removable internal walls to allow both individual and grouphousing (C2), in addition to the control group (C: conventional individual cage), on welfare, reproductive performance, and global efficiency. Forty-eight New Zealand White nulliparous rabbit does underwent artificially insemination (AI) and were divided into three groups, and reared in the different systems for about 1 year. The reproductive rhythm provides AIs at weaning (30d). In the C1 system, does were continuously grouped, while in C2, walls were inserted four days before kindling and removed 1week after it (60% of the timesheet in group). Reproductive traits and behaviour were evaluated during the entire year. The behavioural observations were performed around days 7, 36, and 44, corresponding to the inclusion of the does in the maternal cages, the insertion of walls four days before kindling, and the removal of the walls 1week after parturition in the C2 group, respectively. The percentages of does with severe skin injuries and the distribution of the injuries on different parts of body were also registered. Does reared in conventional cages showed the greatest presence of stereotype behaviours, while the C1 group showed the highest (p < 0.05) incidence of aggressiveness after regrouping (attack, dominance features, and lower allo-grooming) in comparison to the C2 group (17% and 22%, in C2 and C1 does, respectively).Individually caged does achieved the best productive performance (sexual receptivity, fertility, kindling rate, and number of kits born alive and at weaning). The C1 group showed the lowest performance (p < 0.05), whereas C2 showed an intermediate one. Does housed in the combi cage (C2) had higher (p < 0.05) receptivity and fertility rates and higher numbers of kits born alive and at weaning (79.2% and 76.2%; 7.95 and 7.20, respectively) than the C1 group, but lower values (p < 0.05) than does that were individually housed.

The dynamics of energy supply and demand of foaling mares managed at pasture: a deterministic modelling approach

2020 ◽  
Vol 60 (18) ◽  
pp. 2122
Author(s):  
Y. Y. Chin ◽  
F. J. Roca Fraga ◽  
P. J. Back ◽  
E. K. Gee ◽  
C. W. Rogers
Keyword(s):  
New Zealand ◽  
Energy Balance ◽  
Nutritional Status ◽  
Reproductive Performance ◽  
Energy Supply ◽  
Energy Requirement ◽  
Supply And Demand ◽  
Energy Deficit ◽  
Positive Energy ◽  
Deterministic Modelling

Context. At pasture, the nutritional status of mares will change due to a dynamic association between their energy requirements and the energy supply. Change in the plane of nutrition can influence reproductive performance measures in the mares. To help optimise nutritional and operational management of mares on stud farms, the nutritional status of Thoroughbred broodmares and the factors influencing the energy supply and demand were investigated. Aims. To assess nutritional status of the Thoroughbred broodmare herds under ‘normal’ New Zealand commercial stud-farm conditions. Methods. The energy intake, energy requirement and energy balance during the last 3 months of pregnancy and the first 5 months of lactation were modelled for mares with an initial bodyweight of 450 kg, 500 kg, 550 kg and 600 kg, and foaled at 0, 15, 50, and 90 days after 1 September. Key results. For all foaling dates and bodyweights, mares were in positive energy balance during the last 3 months of pregnancy (6.1–8.5%). Energy balance decreased as pregnancy progressed, followed by a large and acute energy deficit that was initiated soon after foaling and continued during lactation. The energy deficit during lactation varied between –8.6% and –12.4%, depending on the foaling date modelled. Mares foaling later in the season (50–90 days after 1 September) had greater and longer (30–50 days) postpartum energy deficit than did mares that foaled earlier in the season, who recovered within 20 days postpartum. The modelled changes in the energy balance would be large enough to initiate mobilisation of the fat reserve (body condition), and could, therefore, explain the observation of delayed postpartum to conception interval observed with later-foaling mares on commercial farms. Conclusions. There is a large and prolonged energy deficit soon after foaling and throughout 150 days of lactation in Thoroughbred mares managed under New Zealand commercial grazing conditions. Foaling later in the season can cause a mismatch in energy supply and demand that would increase and prolong the energy deficit. Implications. These findings suggest a need for stud farms to actively manage the pasture supply and monitor the mare’s BWT and BCS changes in an attempt to optimise the mare’s nutritional status and reproductive performance.

A note on post maturity in purebred commercial rabbits in Egyptian conditions

1994 ◽  
Vol 58 (2) ◽  
pp. 294-297 ◽  
Author(s):  
A. A. El-Darawany
Keyword(s):  
New Zealand ◽  
High Mortality ◽  
Reproductive Performance ◽  
Anterior Fontanelle ◽  
High Incidence ◽  
Pup Mortality

The present study was carried out on the pure Bauscat (Bau), pure New Zealand (NZW) and pure Californian (Cal) strains of rabbit. Overall reproductive performance for overdue does of the three breeds was determined and compared with that of does delivering at the normal time. Overdue does of the Bau and NZW breeds had a significantly (P < 0·05) higher annual mean number of pups weaned than overdue Cal does. There was a high incidence of pup mortality in post-mature litters, and the causes of this high mortality were crushing of the skull followed by subsequent stillborn-birth difficulties and intra-uterine death in all three breeds. Obliteration of the anterior fontanelle of pups from post-mature litters occurred in 71%, 75% and 69 % of the deaths diagnosed at birth in the Bau, NZW and Cal breeds, respectively. Induction of parturition with either PGF2α or oxytocin reduced pup mortality in overdue does. The birth-to-remating interval was significantly (P < 0·01) lower in overdue does in which parturition was induced with PGF2∞ but significantly longer when parturition was induced with oxytocin.

Reproductive performance of farmed red deer (Cervus elaphus) in New Zealand: V

2000 ◽  
Vol 44 (3-4) ◽  
pp. 189-204 ◽  
Author(s):  
L.J.M. Audigé ◽  
P.R. Wilson ◽  
R.S. Morris
Keyword(s):  
New Zealand ◽  
Reproductive Performance ◽  
Cervus Elaphus ◽  
Red Deer
Sign in / Sign up

Export Citation Format

Share Document