scholarly journals Determination of hematological values ​​in collared peccary (Peccary tajacu) in captivity from the Chacoan Center for Conservation and Research

2020 ◽  
Vol 10 (2) ◽  
pp. 31-41
Author(s):  
PD Palacios ◽  
JM Campos ◽  
R Fernández ◽  
R Vetter ◽  
A Quintana ◽  
...  
Keyword(s):  
In Captivity ◽  
Collared Peccary ◽  
Hematological Values

scholarly journals Determination of Hematological Values of Common Crocodile (Caiman Crocodilus fuscus) in Captivity in the Magdalena medio of Colombia

2020 ◽  
Vol 25 (1) ◽  
pp. 75-81
Author(s):  
Juana Valentina Grijalba Otálora ◽  
Ekin Josué Forero Rojas ◽  
Angie Fernanda Contreras ◽  
Julio Cesar Vargas ◽  
Roy Jose Andrade
Keyword(s):  
Blood Cells ◽  
Hemoglobin Concentration ◽  
Good Health ◽  
Corpuscular Volume ◽  
Corpuscular Hemoglobin ◽  
Blood Samples ◽  
Caiman Crocodilus ◽  
In Captivity ◽  
Hematological Values

Caiman zoo breeding (Caiman crocodilus fuscus) has been developing with greater force in Colombia since the 90s. It is essential to evaluate the physiological ranges of the species to be able to assess those situations in which their health is threatened. The objective of the present study was to determine the typical hematological values of the Caiman (Caiman crocodilus fuscus) with the aid of the microhematocrit, the cyanmethemoglobin technique, and a hematological analyzer. The blood samples were taken from 120 young animals of both sexes in good health apparently (males 44 and females 76). The samples were taken from the coccygeal vein between the second and third interscalar space with lilac lid vacutainer tube whit acid ethylene-diamine-tetra-acetic as an anticoagulant. The animals are located in the middle of the Magdalena area in Colombia. The results obtained on average were Hematocrit: 23.36 %, Hemoglobin: 7.78 g/dl, Red blood cells: 3.89 106/μL, Average corpuscular volume: 60 fl, Average corpuscular hemoglobin concentration: 33.33 g/dl and Average corpuscular hemoglobin: 73.9 pg. This is the first study of hematological values for this particular species in Colombia.

Reproduction in the red-legged pademelon, Thylogale stigmatica Gould (Marsupialia : Macropodidae), and age estimation and development of pouch young

1994 ◽  
Vol 21 (5) ◽  
pp. 553 ◽  
Author(s):  
PM Johnson ◽  
K Vernes
Keyword(s):  
Age Estimation ◽  
Post Partum ◽  
General Pattern ◽  
Age Determination ◽  
Gestation Period ◽  
Growth Equation ◽  
In Captivity ◽  
In The Wild ◽  
The Mean

The reproduction of Thylogale stigmatica in captivity was studied and a predictive growth equation for age determination of the pouch young was developed. The general pattern of reproduction involved an oestrous cycle of 29-32 days, a gestation period of 28-30 days and a mean pouch life of 184 days. A post-partum oestrus and mating generally followed birth. Births were observed in all months in captivity, and from October to June in the wild. Mean age of weaning of young was 66 days following permanent pouch emergence, and the mean ages at maturity for females and males was 341 and 466 days, respectively.

scholarly journals Effect of temperature on growth of the threatened annual fish Austrolebias nigrofasciatus Costa & Cheffe 2001

2012 ◽  
Vol 12 (4) ◽  
pp. 68-73 ◽  
Author(s):  
Matheus Vieira Volcan ◽  
Alinca Peres da Fonseca ◽  
Mário Roberto Chim Figueiredo ◽  
Luís André Sampaio ◽  
Ricardo Berteaux Robaldo
Keyword(s):  
Growth Rate ◽  
Sexual Dimorphism ◽  
Effect Of Temperature ◽  
Initial Growth ◽  
Southern Brazil ◽  
Annual Fish ◽  
Annual Killifish ◽  
In Captivity ◽  
Final Length

This study evaluated the effect of temperature on growth of Austrolebias nigrofasciatus, an endemic and threatened annual killifish species of the Patos-Mirim lagoon system in Southern Brazil. In order to verify the effect of temperature on initial growth of A. nigrofasciatus, eggs stored in the laboratory were hatched and juveniles reared for eight weeks at 16 and 22 ºC. The standard length of newly hatched fishes was 4.67 ± 0.25 mm and after eight weeks they reached 23.68 ± 3.73 and 22.68 ± 5.36 mm, respectively at 16 and 22 ºC. However, initial growth of fish reared at 22 ºC was faster and they reached sexual dimorphism at an earlier age compared to those reared at 16 ºC. Final length of females reared at 22 ºC was 23.00 ± 2.83 mm, they were significantly larger than those reared at 16 ºC (17.91 ± 2.47 mm). Males were significantly larger than the females at 16 ºC, but there was no difference for growth between sexes of fish reared at 22 ºC. The sex ratios were 1:0.6 and 1:1.1 (M:F) at 16 ºC and 22 ºC, respectively, suggesting temperature determination of phenotypic sex. Considering the results, it appears that juveniles to be developed in captivity should be kept at 22 ºC during the first six weeks of life, thus ensuring a higher growth rate until puberty.

Reproduction of the purple-necked rock-wallaby, Petrogale purpureicollis Le Souef (Marsupialia : Macropodidae) in captivity, with age estimation and development of the pouch young

2002 ◽  
Vol 29 (5) ◽  
pp. 463 ◽  
Author(s):  
Peter M. Johnson ◽  
Steven Delean
Keyword(s):  
Polynomial Growth ◽  
Age Determination ◽  
Mixed Effects Models ◽  
Embryonic Diapause ◽  
Linear Mixed Effects ◽  
In Captivity ◽  
Growth Equations ◽  
The Relationship ◽  
Age Prediction

Reproduction of the purple-necked rock-wallaby, Petrogale purpureicollis, was studied in captivity. The length of the oestrous cycle was 36–38 days followed by a gestation period of 33–35 days. Birth was usually followed by an oestrus and mating, and a subsequent lactation-controlled embryonic diapause. The interval between loss of pouch young and birth was 30–36 days. Pouch life was 178–197 days and weaning occurred 92–171 days after permanent emergence from the pouch. The youngest age at which sexual maturity was reached was 21.8 months for males and 18 months for females. Linear mixed-effects models were used to describe polynomial growth equations for age determination of pouch young using both head and pes length. The relationship between error in age prediction and each body measurement was also defined. Head measurements provided the most accurate estimates of the age of pouch young.

Reproduction of the spectacled hare-wallaby, Lagorchestes conspicillatus Gould (Marsupialia: Macropodidae), in captivity, with age estimation of the pouch young

1993 ◽  
Vol 20 (1) ◽  
pp. 97
Author(s):  
PM Johnson
Keyword(s):  
Age Estimation ◽  
Age Determination ◽  
Gestation Period ◽  
Northern Australia ◽  
Normal Pattern ◽  
Widespread Distribution ◽  
Young Females ◽  
In Captivity ◽  
One Year

Lagorchestes conspicillatus has a widespread distribution across northern Australia. Observations were made on reproduction in captive animals and a key produced for age determination of pouch young. Females commence breeding at about one year of age and males when slightly older. Reproduction in this species involved an oestrous cycle of 30 days, a gestation period of 29-31 days and a mean pouch life of 152 days. A postpartum oestrus and mating following a birth was the normal pattern of reproduction.

Reproduction of Lumholtz's tree-kangaroo, Dendrolagus lumholtzi (Marsupialia : Macropodidae) in captivity, with age estimation and development of the pouch young

2003 ◽  
Vol 30 (5) ◽  
pp. 505 ◽  
Author(s):  
Peter M. Johnson ◽  
Steven Delean
Keyword(s):  
Polynomial Growth ◽  
Post Partum ◽  
Age Determination ◽  
Linear Mixed Effects ◽  
In Captivity ◽  
Growth Equations ◽  
The Relationship ◽  
Dendrolagus Lumholtzi ◽  
Age Prediction

Reproduction in Lumholtz's tree kangaroo, Dendrolagus lumholtzi, was studied in captivity. The length of the oestrous cycle was 47–64 days and the gestation period was 42–48 days. Post partum oestrus and embryonic diapause were not observed in this study. The interval between loss of a pouch young and a return mating was 22 days. Pouch life was 246–275 days long and weaning occurred 87–240 days later. Sexual maturity was obtained in females as early as 2.04 years and in males at 4.6 years. Linear mixed-effects models are used to describe polynomial growth equations for age determination of pouch young using both head and pes length. The relationship between error in age prediction and each body measurement is also defined. Head and pes measurements provide equally accurate estimates of the age of pouch young.

Corrigendum to: Reproduction in the northern bettong, Bettongia tropica Wakefield (Marsupialia : Potoroidae), in captivity, with age estimation and development of the pouch young

2001 ◽  
Vol 28 (6) ◽  
pp. 647 ◽  
Author(s):  
Peter M. Johnson ◽  
Steven Delean
Keyword(s):  
Polynomial Growth ◽  
Mating Behaviour ◽  
Age Determination ◽  
Embryonic Diapause ◽  
Linear Mixed Effects ◽  
In Captivity ◽  
Growth Equations ◽  
The Relationship ◽  
Age Prediction

Reproduction in the northern bettong, Bettongia tropica, was studied in captivity. B. tropica is capable of breeding throughout the year, and mating behaviour is similar to that reported for other Bettongia species. The length of the oestrous cycle was 21–23 days, and the period of gestation was 20–23 days. Birth was usually followed by an oestrus and mating, and a subsequent lactation-controlled embryonic diapause. The interval between loss of pouch young and birth was 19–20 days. Permanent emergence from the pouch occurred at 102–112 days, and young at foot were weaned at 166–185 days of age. Linear mixed-effects models were used to describe polynomial growth equations for age determination of pouch young using both head and pes length. The relationship between error in age prediction and each body measurement was also defined. Pes measurements provided the most accurate estimates of the age of pouch young.

scholarly journals Puberty in male collared peccary (Pecari tajacu) determined by quantitative analysis of spermatogenic cells

2013 ◽  
Vol 43 (1) ◽  
pp. 99-103 ◽  
Author(s):  
Diva Anelie Guimarães ◽  
Deise de Lima Cardoso ◽  
Maria Auxiliadora Pantoja Ferreira ◽  
Natália Inagaki de Albuquerque
Keyword(s):  
Reproductive Development ◽  
Seminiferous Tubules ◽  
Testis Weight ◽  
Spermatogenic Cells ◽  
Positive Correlation ◽  
Biological Studies ◽  
In Captivity ◽  
Pecari Tajacu ◽  
Collared Peccary ◽  
Tubular Diameter

Biological studies are necessary for the management of wildlife in captivity, and knowledge of reproduction is one of the important features for increasing production. The objective of the research was to determine the age at which male collared peccaries reach puberty. Testicular samples of 15 animals, aged 7 to 16 months, distributed into five groups (G1, G2, G3, G4 and G5) were used. The testes showed considerably increased weight, length and width (p < 0.05) from G1 to G3, whereas, from this group onward, the development of this organ was slower. There was positive correlation (p < 0.001) between the following testicular parameters: weight and length (r = 0.97), weight and width (r = 0.88), length and width (r = 0.92). Regarding the diameter of seminiferous tubules, an increase was observed (p < 0.05) from G1 to G4. The total number of spermatogenic cells increased significantly (p < 0.05) until G3 and then it stabilized. There was also positive correlation between testis weight and tubular diameter (r = 0.99, p < 0.001), and testis weight and spermatogenic cells (r = 0.98, p < 0.001). The number of Sertoli cells decreased significantly (p < 0.05) from G1, when they were undifferentiated as support cells, to G5, when they occurred together with the complete line of spermatic cells. The results demonstrate that the reproductive development of peccaries can be classified into the following stages: impuberty (G1, 7-8 months); pre-pubertal (G2, 9-10 months); pubertal (G3, 11-12 months); post-pubertal 1 (G4, 13-14 months); and post-pubertal 2 (G5, 15-16 months). Based on the histological analyses, puberty in the male collared peccary was determined to occur between 11 and 12 months of age.

scholarly journals Brief Note : Chromosome comparison between populations of the collared peccary, Tayassu tajacu, raised in captivity

BIOCELL ◽  
2008 ◽  
Vol 32 (2) ◽  
pp. 207-210
Author(s):  
PATR虲IA CARVALHO DE SOUZA ◽  
R�SALIM KHAYAT ◽  
IGOR CHAMON SELIGMANN ◽  
ROMMEL MARIO RODR虶UEZ BURBANO
Keyword(s):  
In Captivity ◽  
Collared Peccary ◽  
Tayassu Tajacu
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