Reproduction in Antechinus maculatus Gould (Dasyuridae)

1975 ◽  
Vol 2 (1) ◽  
pp. 77 ◽  
Author(s):  
HJ Aslin
Keyword(s):  
Breeding Season ◽  
Reproductive Potential ◽  
Gestation Period ◽  
In Captivity ◽  
Males And Females

The smallest member of the genus Antechinus, A. maculatus has a breeding pattern unlike that of its congeners. Captive females are polyoestrous, and can rear several litters of young each year. Both males and females show an extended breeding season in captivity, and males do not become senile after 12 months of age. Seven litters of A. maculatus, each containing up to 11 young, have been bred; the gestation period is 19-20 days. In comparison with most other marsupials, A. maculatus has a high reproductive potential in captivity.

Reproduction in Sminthopsis-Longicaudata (Marsupialia, Dasyuridae) - Laboratory Observations

1986 ◽  
Vol 13 (1) ◽  
pp. 7 ◽  
Author(s):  
PA Woolley ◽  
A Valente
Keyword(s):  
Endangered Species ◽  
Breeding Season ◽  
Early Summer ◽  
Oestrous Cycle ◽  
Gestation Period ◽  
Late Winter ◽  
Breeding Condition ◽  
Males And Females ◽  
The Mean

Observations on the pattern of reproduction in Sminthopsis longicaudata, at present considered to be an endangered species, are presented. S. longicaudata is polyoestrous and in the laboratory females are in breeding condition from late winter (August) to early summer (December). They enter oestrus up to four times during the breeding season. Two litters were born 17 and 19 days post-mating, but the gestation period may be less than 15 days. The mean length of the oestrous cycle is 34.4 days. Both males and females may be able to breed in more than one season.

Reproduction in the Plain Rock-Wallaby, Petrogale penicillata inornata Gould, in Captivity, with Age Estimation of the Pouch Young

1979 ◽  
Vol 6 (1) ◽  
pp. 1 ◽  
Author(s):  
PM Johnson
Keyword(s):  
Age Estimation ◽  
Post Partum ◽  
Oestrous Cycle ◽  
Gestation Period ◽  
In Captivity ◽  
Hind Foot ◽  
Males And Females ◽  
Premature Removal

'Reproduction in the plain rock-wallaby was studied in captivity. The oestrous cycle ranged from 30.2 to 32.0 days and the gestation period from 30.0 to 32.0 days. A post-partum mating usually followed birth; the resultant quiescent embryo developed and was born 28-30 days after premature removal of pouch young. The pouch life of the young ranged from 189 to 227 days, males and females maturing sexually at approximately 590 and 540 days respectively. Tail and hind foot lengths were found to be useful indicators of age of young up to the end of pouch life.

The mating behaviour of the dibbler, Parantechinus apicalis, in captivity

2000 ◽  
Vol 48 (5) ◽  
pp. 541 ◽  
Author(s):  
Kristen M. Wolfe ◽  
Helen Robertson ◽  
Roberta Bencini
Keyword(s):  
Breeding Season ◽  
Captive Breeding ◽  
Average Distance ◽  
Mating Behaviour ◽  
Breeding Colony ◽  
Direct Observations ◽  
Significant Difference ◽  
In Captivity ◽  
Males And Females

A study of the mating behaviour of the dibbler, Parantechinus apicalis, was conducted at a captive-breeding colony at Perth Zoo. In total, 21 pairs of P. apicalis were observed. The oestrous cycles of the females were monitored, and the males and females were paired when the females were approaching oestrus. Direct observations were made of the pairs over a 2-h period 3–4 times a week for the duration of the breeding season (mid February to April). It was found that the mating behaviour of P. apicalis was similar to that of other dasyurids; in particular, sniffing, vocalisations, chasing and attempted mounting tended to increase in the days leading up to mating. No significant difference was found between successful pairs (i.e. those that did mate) and unsuccessful pairs (i.e. those that did not) in the number of interactions and the average distance between the pair.

Reproduction in the Bridled Nailtail Wallaby, Onychogalea fraenata Gould (Marsupialia : Macropodidae), in Captivity

1997 ◽  
Vol 24 (4) ◽  
pp. 411 ◽  
Author(s):  
P. M. Johnson
Keyword(s):  
Post Partum ◽  
Oestrous Cycle ◽  
Gestation Period ◽  
Young Males ◽  
In Captivity ◽  
Males And Females ◽  
The Mean

The reproduction of the endangered macropod Onychogalea fraenata was studied in captivity. O. fraenata breeds throughout the year. A post-partum oestrus was not recorded, although mating during the pouch life was observed when the pouch young were 80–92 days old. The mean length of the oestrous cycle was determined to be 36·2 days, while the mean length of a gestation period was 23·6 days. Pouch life ranged between 119 and 126 days, and the young males and females matured as early as 270 days and 136 days, respectively.

Observation on the breeding biology of Polypedates teraiensis (Dubois, 1987) (Amphibia: Rhacophoridae)

2017 ◽  
Vol 17 (1) ◽  
pp. 25-32
Author(s):  
Jacinta Lalchhanhimi ◽  
Lalremsanga H.T.
Keyword(s):  
Sexual Dimorphism ◽  
Breeding Season ◽  
Sound Production ◽  
Reproductive Function ◽  
Breeding Biology ◽  
Tree Frog ◽  
University Campus ◽  
Morphometric Measurements ◽  
Advertisement Calls ◽  
Males And Females

The breeding biology of tree frog, Polypedates teraiensis was studied during the breeding season at Mizoram University Campus. It was found that sound production by male during the breeding season was primarily a reproductive function and advertisement calls attract females to the breeding areas and announce other males that a given territory is occupied. The aim of this study was to provide the detailed information on the breeding behaviour and the advertisement calls of Polypedates teraiensis. The morphometric measurements of the amplecting pairs (males and females) for sexual dimorphism along with clutch sizes were also studied.

scholarly journals Fishery-induced changes in Norwegian red king crab (Paralithodes camtschaticus) reproductive potential

2013 ◽  
Vol 71 (2) ◽  
pp. 365-373 ◽  
Author(s):  
Ann Merete Hjelset
Keyword(s):  
Egg Production ◽  
Barents Sea ◽  
Reproductive Potential ◽  
Size Composition ◽  
Red King Crab ◽  
Paralithodes Camtschaticus ◽  
King Crab ◽  
Males And Females ◽  
Induced Changes ◽  
Individual Fecundity

Abstract Hjelset, A. M. 2014. Fishery-induced changes in Norwegian red king crab (Paralithodes camtschaticus) reproductive potential. – ICES Journal of Marine Science, 71: 365–373. The introduced red king crab (Paralithodes camtschaticus) in the Barents Sea supports a valuable fishery in northern Norway. In this paper, I examine the effect of the increased harvest rate and the recently added female quota on the potential egg production of the stock. The size ranges of males and females in the period 1995–2011 were recorded, and estimated stock abundance of ovigerous females and established individual fecundity parameters from 2000–2007 were used to assess the reproductive potential of the stock from 1995–2011. The upper size ranges of males and females decreased throughout the period studied, presumably mainly due to fishing. The change in size composition among ovigerous females and functional mature males, and the reduced mean individual fecundity in the stock seem to have had a negative effect on the potential egg production of the stock.

Comparative analysis of productive qualities of Sables without gray hair and with different degrees of gray hair in JSC «Plemzverosovkhoz» Saltykovsky»

2020 ◽  
Vol 1 (4) ◽  
pp. 63-67
Author(s):  
N. N. Shumilina ◽  
◽  
E. E. Larina ◽  
Keyword(s):  
Comparative Analysis ◽  
Entire Range ◽  
Comparative Assessment ◽  
Positive Correlation ◽  
Gray Hair ◽  
In Captivity ◽  
Males And Females ◽  
Length And Area ◽  
Common Defect

The pride of Russia has always been sable. Sable is unique not only in the quality of its fur, but also in the fact that almost the entire range of its habitat is located on the territory of our country. It was in our country that this animal was first bred in captivity. In this regard, Russia has long had a monopoly on the production of sable skins. In 1969, the black sable breed was approved, and in 1998, the «Saltykov» type of sable was approved. JSC «Saltykovsky Breeding farm» has created a unique herd of dark Sables with evenly spaced gray hair, the skins of which are valued at auctions by 10–30% more expensive [2]. The article presents the results of a comparative assessment of the productive qualities of Sables without gray hair and with different degrees of gray created in JSC «Plemzverosovkhoz » Saltykovsky» livestock. As a result of the analysis, it was found that Sables with gray hair have higher bonitirovki scores (more than 50%). Analyzing the indicators of bonitirovki in males and females with different degrees of gray hair, it was found that the quality of pubescence and color of males with bright gray hair is significantly superior to individuals without gray hair, the same trend is observed in females. In addition, a positive correlation was found (0,79) between the weight of skins in grams, their length and area both in Sables without gray hair, and in individuals with different degrees of gray hair. The most common defect on skins without gray hair is soaking.

scholarly journals Preliminary notes on the behaviour and breeding of Gerbillurus Paeba Paeba (A. Smith, 1834) in captivity

Koedoe ◽  
1973 ◽  
Vol 16 (1) ◽  
Author(s):  
C.J. Stutterheim ◽  
J.D. Skinner
Keyword(s):  
General Behaviour ◽  
Outdoor Enclosure ◽  
In Captivity ◽  
Males And Females

A captive colony of Gerbillurus p. paeba was studied inan outdoor enclosure and observation cages. The general behaviour is discussed and notes on the reproduction andreproductive behaviour given. Increasing the number of lighthours and increasing the temperature seem to induce fertilityin both males and females. The external parasites found on Gerbillurus are listed.

scholarly journals On the gestation period of Indian pangolins (Manis crassicaudata) in captivity

2018 ◽  
Vol 2 (6) ◽  
Author(s):  
Rajesh K Mohapatra ◽  
Sudarsan Panda ◽  
Sarat K Sahu
Keyword(s):  
Gestation Period ◽  
In Captivity

Functional Maturity in Small Male Snow Crabs (Chionoecetes opilio)

1988 ◽  
Vol 45 (12) ◽  
pp. 2106-2109 ◽  
Author(s):  
G. P. Ennis ◽  
R. G. Hooper ◽  
D. M. Taylor
Keyword(s):  
Rapid Development ◽  
Carapace Width ◽  
Reproductive Potential ◽  
Snow Crab ◽  
Small Male ◽  
Chionoecetes Opilio ◽  
In Captivity ◽  
Breeding Migration ◽  
High Level ◽  
Snow Crabs

The mean size of male snow crabs (Chionoecetes opilio) in sexual pairs during the annual spring breeding migration to shallow water in Bonne Bay, Newfoundland, decreased from 118.6 mm carapace width (CW) in 1983 to 100.3 mm in 1987. This decrease is due to an increase in males <95 mm CW participating from 1.5% in 1983 to 32.3% in 1987. This change appears to have resulted from a reduced abundance of commercial size [Formula: see text] males due to a rapid development of an illegal fishery on this previously unfished population and, as a consequence, less competition between males for possession of females. The percentages of spermathecae containing new spermatophores for females paired with males <95 mm CW (67%) and those with males [Formula: see text] (79%) were not significantly different. We assumed that each female with new spermatophores had recently mated with the male with which it was paired. Observations on selected pairs in captivity showed that males <95 mm CW are capable of mating with both primiparous and muitiparous females. Our results indicate that small mature males can replace large males in breeding activity in a snow crab population. We conclude that in the male-only snow crab fishery in Atlantic Canada with a minimum legal size of 95 mm CW, population reproductive potential is maintained at a high level despite high exploitation rates on males [Formula: see text].

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