Seasonal effects on gestation length and birth weight in alpacas
Gestation lengths and birth weights were measured in 162 pregnancies in alpacas ( Lama pacos) farmed in the high country of the South Island of New Zealand. A comparison of pregnancies from spring (mid-October to mid-December) and autumn (mid-February to late April) matings showed that gestation len...
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Veröffentlicht in: | Animal reproduction science 1997-04, Vol.46 (3), p.297-303 |
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creator | Davis, G.H. Dodds, K.G. Moore, G.H. Bruce, G.D. |
description | Gestation lengths and birth weights were measured in 162 pregnancies in alpacas (
Lama pacos) farmed in the high country of the South Island of New Zealand. A comparison of pregnancies from spring (mid-October to mid-December) and autumn (mid-February to late April) matings showed that gestation lengths were 12.5 days longer in spring (348.9 ± 1.4 days vs. 336.4 ± 1.2 days;
P < 0.0001). For each day later in spring that a female was mated there was an increase in gestation length of 0.11 days (
P < 0.05), whereas for each day later in autumn the gestation was reduced by 0.24 days. There were no significant effects of sex of cria or age of dam on gestation length. After adjustment for gestation length, crias born in autumn weighed 1.0 kg more than those born in spring (8.8 ± 0.15 kg vs. 7.8 ± 0.18 kg;
P < 0.001). Female crias weighed 0.4 kg less than males at birth (
P < 0.05). The results suggest that in this environment it will be difficult to maintain spring-mated females in a 12 month breeding cycle. |
doi_str_mv | 10.1016/S0378-4320(96)01611-9 |
format | Article |
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Lama pacos) farmed in the high country of the South Island of New Zealand. A comparison of pregnancies from spring (mid-October to mid-December) and autumn (mid-February to late April) matings showed that gestation lengths were 12.5 days longer in spring (348.9 ± 1.4 days vs. 336.4 ± 1.2 days;
P < 0.0001). For each day later in spring that a female was mated there was an increase in gestation length of 0.11 days (
P < 0.05), whereas for each day later in autumn the gestation was reduced by 0.24 days. There were no significant effects of sex of cria or age of dam on gestation length. After adjustment for gestation length, crias born in autumn weighed 1.0 kg more than those born in spring (8.8 ± 0.15 kg vs. 7.8 ± 0.18 kg;
P < 0.001). Female crias weighed 0.4 kg less than males at birth (
P < 0.05). The results suggest that in this environment it will be difficult to maintain spring-mated females in a 12 month breeding cycle.</description><identifier>ISSN: 0378-4320</identifier><identifier>EISSN: 1873-2232</identifier><identifier>DOI: 10.1016/S0378-4320(96)01611-9</identifier><identifier>PMID: 9231268</identifier><language>eng</language><publisher>Netherlands: Elsevier B.V</publisher><subject>ALPACA ; ALPACAS ; ALPAGA ; Animals ; Animals, Newborn - physiology ; BIRTH WEIGHT ; Birth Weight - physiology ; Camelids, New World - physiology ; Female ; GESTACION ; GESTATION ; GESTATION PERIOD ; Gestational Age ; Male ; PERIODE DE GESTATION ; PERIODO DE GESTACION ; PESO AL NACIMIENTO ; POIDS A LA NAISSANCE ; PREGNANCY ; Pregnancy, Animal - physiology ; Seasonal dynamics ; SEASONAL VARIATION ; Seasons ; Sex Characteristics ; VARIACION ESTACIONAL ; VARIATION SAISONNIERE</subject><ispartof>Animal reproduction science, 1997-04, Vol.46 (3), p.297-303</ispartof><rights>1997</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c382t-81c31cac5eaeb5c060123cb879195b5b7b3fef5e13159ac46b074a06ebbe146a3</citedby><cites>FETCH-LOGICAL-c382t-81c31cac5eaeb5c060123cb879195b5b7b3fef5e13159ac46b074a06ebbe146a3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0378432096016119$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65534</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/9231268$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Davis, G.H.</creatorcontrib><creatorcontrib>Dodds, K.G.</creatorcontrib><creatorcontrib>Moore, G.H.</creatorcontrib><creatorcontrib>Bruce, G.D.</creatorcontrib><title>Seasonal effects on gestation length and birth weight in alpacas</title><title>Animal reproduction science</title><addtitle>Anim Reprod Sci</addtitle><description>Gestation lengths and birth weights were measured in 162 pregnancies in alpacas (
Lama pacos) farmed in the high country of the South Island of New Zealand. A comparison of pregnancies from spring (mid-October to mid-December) and autumn (mid-February to late April) matings showed that gestation lengths were 12.5 days longer in spring (348.9 ± 1.4 days vs. 336.4 ± 1.2 days;
P < 0.0001). For each day later in spring that a female was mated there was an increase in gestation length of 0.11 days (
P < 0.05), whereas for each day later in autumn the gestation was reduced by 0.24 days. There were no significant effects of sex of cria or age of dam on gestation length. After adjustment for gestation length, crias born in autumn weighed 1.0 kg more than those born in spring (8.8 ± 0.15 kg vs. 7.8 ± 0.18 kg;
P < 0.001). Female crias weighed 0.4 kg less than males at birth (
P < 0.05). The results suggest that in this environment it will be difficult to maintain spring-mated females in a 12 month breeding cycle.</description><subject>ALPACA</subject><subject>ALPACAS</subject><subject>ALPAGA</subject><subject>Animals</subject><subject>Animals, Newborn - physiology</subject><subject>BIRTH WEIGHT</subject><subject>Birth Weight - physiology</subject><subject>Camelids, New World - physiology</subject><subject>Female</subject><subject>GESTACION</subject><subject>GESTATION</subject><subject>GESTATION PERIOD</subject><subject>Gestational Age</subject><subject>Male</subject><subject>PERIODE DE GESTATION</subject><subject>PERIODO DE GESTACION</subject><subject>PESO AL NACIMIENTO</subject><subject>POIDS A LA NAISSANCE</subject><subject>PREGNANCY</subject><subject>Pregnancy, Animal - physiology</subject><subject>Seasonal dynamics</subject><subject>SEASONAL VARIATION</subject><subject>Seasons</subject><subject>Sex Characteristics</subject><subject>VARIACION ESTACIONAL</subject><subject>VARIATION SAISONNIERE</subject><issn>0378-4320</issn><issn>1873-2232</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1997</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqFkMtOwzAQRS0EKqXwCZWyQrAI2HHixCtAFS-pgkVhbY2dSWqUJsVOQfw97kNlyWxmNPfOQ4eQMaNXjDJxPaM8L-KUJ_RCisvQYSyWB2TIipzHScKTQzLcW47JifcflNJcCDkgA5lwlohiSG5nCL5roYmwqtD0PuraqEbfQ29D1WBb9_MI2jLS1oXqG2097yPbRtAswYA_JUcVNB7PdnlE3h_u3yZP8fT18XlyN40NL5I-LpjhzIDJEFBnhgrKEm50kUsmM53pXPMKqwwZZ5kEkwpN8xSoQK2RpQL4iJxv9y5d97kKD6qF9QabBlrsVl6FRWkIGozZ1mhc573DSi2dXYD7UYyqNTm1IafWWJQUakNOyTA33h1Y6QWW-6kdqj-9gk5B7axXL1MmZRGo8iIN-s1Wx0Dhy6JT3lhsDZbWBbCq7Ow_H_wCTtSF6w</recordid><startdate>19970401</startdate><enddate>19970401</enddate><creator>Davis, G.H.</creator><creator>Dodds, K.G.</creator><creator>Moore, G.H.</creator><creator>Bruce, G.D.</creator><general>Elsevier B.V</general><scope>FBQ</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>19970401</creationdate><title>Seasonal effects on gestation length and birth weight in alpacas</title><author>Davis, G.H. ; Dodds, K.G. ; Moore, G.H. ; Bruce, G.D.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c382t-81c31cac5eaeb5c060123cb879195b5b7b3fef5e13159ac46b074a06ebbe146a3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1997</creationdate><topic>ALPACA</topic><topic>ALPACAS</topic><topic>ALPAGA</topic><topic>Animals</topic><topic>Animals, Newborn - physiology</topic><topic>BIRTH WEIGHT</topic><topic>Birth Weight - physiology</topic><topic>Camelids, New World - physiology</topic><topic>Female</topic><topic>GESTACION</topic><topic>GESTATION</topic><topic>GESTATION PERIOD</topic><topic>Gestational Age</topic><topic>Male</topic><topic>PERIODE DE GESTATION</topic><topic>PERIODO DE GESTACION</topic><topic>PESO AL NACIMIENTO</topic><topic>POIDS A LA NAISSANCE</topic><topic>PREGNANCY</topic><topic>Pregnancy, Animal - physiology</topic><topic>Seasonal dynamics</topic><topic>SEASONAL VARIATION</topic><topic>Seasons</topic><topic>Sex Characteristics</topic><topic>VARIACION ESTACIONAL</topic><topic>VARIATION SAISONNIERE</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Davis, G.H.</creatorcontrib><creatorcontrib>Dodds, K.G.</creatorcontrib><creatorcontrib>Moore, G.H.</creatorcontrib><creatorcontrib>Bruce, G.D.</creatorcontrib><collection>AGRIS</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Animal reproduction science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Davis, G.H.</au><au>Dodds, K.G.</au><au>Moore, G.H.</au><au>Bruce, G.D.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Seasonal effects on gestation length and birth weight in alpacas</atitle><jtitle>Animal reproduction science</jtitle><addtitle>Anim Reprod Sci</addtitle><date>1997-04-01</date><risdate>1997</risdate><volume>46</volume><issue>3</issue><spage>297</spage><epage>303</epage><pages>297-303</pages><issn>0378-4320</issn><eissn>1873-2232</eissn><abstract>Gestation lengths and birth weights were measured in 162 pregnancies in alpacas (
Lama pacos) farmed in the high country of the South Island of New Zealand. A comparison of pregnancies from spring (mid-October to mid-December) and autumn (mid-February to late April) matings showed that gestation lengths were 12.5 days longer in spring (348.9 ± 1.4 days vs. 336.4 ± 1.2 days;
P < 0.0001). For each day later in spring that a female was mated there was an increase in gestation length of 0.11 days (
P < 0.05), whereas for each day later in autumn the gestation was reduced by 0.24 days. There were no significant effects of sex of cria or age of dam on gestation length. After adjustment for gestation length, crias born in autumn weighed 1.0 kg more than those born in spring (8.8 ± 0.15 kg vs. 7.8 ± 0.18 kg;
P < 0.001). Female crias weighed 0.4 kg less than males at birth (
P < 0.05). The results suggest that in this environment it will be difficult to maintain spring-mated females in a 12 month breeding cycle.</abstract><cop>Netherlands</cop><pub>Elsevier B.V</pub><pmid>9231268</pmid><doi>10.1016/S0378-4320(96)01611-9</doi><tpages>7</tpages></addata></record> |
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subjects | ALPACA ALPACAS ALPAGA Animals Animals, Newborn - physiology BIRTH WEIGHT Birth Weight - physiology Camelids, New World - physiology Female GESTACION GESTATION GESTATION PERIOD Gestational Age Male PERIODE DE GESTATION PERIODO DE GESTACION PESO AL NACIMIENTO POIDS A LA NAISSANCE PREGNANCY Pregnancy, Animal - physiology Seasonal dynamics SEASONAL VARIATION Seasons Sex Characteristics VARIACION ESTACIONAL VARIATION SAISONNIERE |
title | Seasonal effects on gestation length and birth weight in alpacas |
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