Milk of the Galapagos fur seal and sea lion, with a comparison of the milk of Eared seals (Otariidae)

Trillmich, Fritz; Lechner, Evelyn

doi:10.1111/j.1469-7998.1986.tb03581.x

Cited by 52 publications

(29 citation statements)

References 9 publications

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“…Over the first 30 days of lactation the amount of casein in the milk increased by over 50% (Table 2). This fits with the reported increase in milk Ca-content with age of the pup (Trillmich and Lechner, 1986). By day 150 of lactation caseins had roughly doubled.…”

Section: Protein Composition and Characterizationsupporting

confidence: 79%

“…Even tentative homologization of fur seal milk whey components with those of bovine milk seems premature, except perhaps for blood serum albumin. Alpha-lactalbumin appeared to be absent, which is as expected since fur seal milk does not contain lactose (Schmidt et aL, 1971;Trillmich and Lechner, 1986). Fur seal caseins were surprisingly similar to those of artiodactyls (Fig.…”

Section: Fatty Acid Compositionsupporting

confidence: 53%

“…Total nitrogen (TN) and non-protein nitrogen (NPN) were determined as described in Trillmich and Lechner (1986). Total protein nitrogen (TPN=TN-NPN) was determined as ZnSO4-Precipitated nitrogen.…”

Section: Methodsmentioning

confidence: 99%

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Characterization of proteins and fatty acid composition in galapagos fur seal milk. Occurrence of whey and casein protein polymorphisms

Trillmich

Kirchmeier

et al. 1988

Comparative Biochemistry and Physiology Part B: Comparative Bio

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Abstract--1. Milk proteins of the Galapagos fur seal (Arctocephalus galapagoensis) were separated adequately into whey and casein fractions using bovine milk analysis methods.2. In samples from days 5-30 of lactation 40% of the total proteins were whey and 60% caseins; in mid-lactation, day 150, 25% were whey and 75% casein proteins.3. Electrophoretic and isoelectric focusing patterns of fur seal whey protein differed widely from bovine patterns, whereas those of caseins were similar.4. Polymorphisms of fur seal whey and casein proteins were noted and did not seem related to different stages of lactation.5. C-16 and C-18 fatty acids contributed about 70% of fatty acids; 63% of the total acids in milk fat were unsaturated.

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Section: Protein Composition and Characterizationsupporting

confidence: 79%

Section: Fatty Acid Compositionsupporting

confidence: 53%

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Characterization of proteins and fatty acid composition in galapagos fur seal milk. Occurrence of whey and casein protein polymorphisms

Trillmich

Kirchmeier

et al. 1988

Comparative Biochemistry and Physiology Part B: Comparative Bio

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“…Variations in milkfat content, particularly among otariids, appear to be related to maternal attendance patterns (Costa 1991a). Lipid and, therefore, energy content of the milk of otariids increases with trip duration (Trillmich and Lechner 1986). Correlations between milk fat content and trip duration are complicated by the fact that otariid females with short trip durations are low latitude species and those with long trip durations are high latitude species.…”

Section: Time At-sea (Days)mentioning

confidence: 99%

Dolphins as Models for Cost Efficient Autonomous Underwater Vehicles

Williams¹

2000

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“…Guadalupe fur seal pups double their mass within the first 70 days of life, Juan Fernández at 73 days and Galápagos and South African fur seals double their birth mass at 72 days (Trillmich and Lechner 1986;Gentry et al 1986). The similarity among these species is remarkable, given the wide difference in the attendance pattern of energy transfer from the mother to the pup.…”

Section: Acknowledgmentsmentioning

confidence: 99%

Pup growth of the guadalupe fur seal, Arctocephalus townsendi

Gallo‐Reynoso

Figueroa-Carranza²

2010

Therya

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Pups of the Guadalupe fur seal were captured, marked with hair bleach, measured and weighed between two and four times during their first year of life, during three consecutive years (1991, 1992 and 1993) conforming a sample of 132 pups of both sexes. The following param eters were measured: standard length, body mass, and axilar girth, these were measured in the first hours to days of birth when the pup still had attached a soft umbilical cord, and at 40, 145 and 220 days after birth. Mean birth body mass was 4.9 ± 0.5 kg, n = 17 (males: 4.9 ± 0.4 kg, n = 7; females: 4.9 ± 0.5 kg, n = 10), mean length was 64.4 ± 4.3 cm, n = 17 (males: 67.2 ± 3.5 cm, n = 7; females: 62.5 ± 3.7 cm, n = 10). Growth was exponential to 145 days and stabilized to 220 days at weaning age (wean ing takes place between February and March at 9-10 months of age), mean weaner's body mass was 14 ± 2.8 kg, n = 13 (males: 13.7 ± 3.6 kg, n = 5; females: 14.3 ± 2.0 kg, n = 8) with a mean length of 89.4 ± 8 cm, n = 13 (males: 91.3 ± 8.5 cm, n = 5; females: 86.4 ± 6 cm, n = 8). Body mass was not significantly different between the sexes for the fur seal pups, although lengths were significantly different at birth and at several other stages. The curves of body mass-length relationship showed high variability, but nevertheless showed a high correlation, the body mass and length regression was significant (r 2 = 0.7024, P < 0.001). Much of this variability is caused by the long foraging trips of the females. This leads to drastic changes in pup body mass due to rapid milk intake during a mean of 5.03 days of female attendance and major body mass loss during female absence of a mean of 11.5 days.Key words: Guadalupe fur seal, Arctocephalus townsendi, Isla Guadalupe, pup growth.Crías del lobo fino de Guadalupe fueron capturadas, marcadas con decolorante de pelo, medidas y pesadas de dos a cuatro veces durante su primer año de vida, en tres años consecutivos (1991, 1992 y 1993) conformando una muestra de 132 crías de ambos sexos. Se midieron los siguientes parámetros: longitud estándar, peso corporal y circunferencia axilar, estas fueron tomadas en los primeros días del nacimiento, cuando la cría aún tenía el cordón umbilical suave. Estas crías se midieron y pesaron a los 40,

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Milk of the Galapagos fur seal and sea lion, with a comparison of the milk of Eared seals (Otariidae)

Cited by 52 publications

References 9 publications

Characterization of proteins and fatty acid composition in galapagos fur seal milk. Occurrence of whey and casein protein polymorphisms

Characterization of proteins and fatty acid composition in galapagos fur seal milk. Occurrence of whey and casein protein polymorphisms

Dolphins as Models for Cost Efficient Autonomous Underwater Vehicles

Pup growth of the guadalupe fur seal, Arctocephalus townsendi

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