The Composition of Dolphin Milk

Eichelberger, Lillian; Fetcher, E. S.; Geiling, E. M. K.; Vos, B. J.

doi:10.1016/s0021-9258(18)73259-6

Cited by 19 publications

(5 citation statements)

References 7 publications

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“…The offset between calves and juveniles was of lesser magnitude (*1.8 %) than that found for bone collagen in California sea lions and northern fur seals (*3-5 %, Newsome et al 2006). As observed in captive Commerson's dolphins (Joseph et al 1987;Kastelein et al 1993b), until 2 months post-partum, high energy costs associated with lactation likely lead to an increase in food intake for adult females resulting in a greater energy transfer to the calf from milk (Eichelberger et al 1940;Kastelein et al 1993b;Oftedal 1997). After this full nursing period, adult female food intake decreases to a minimum at around the time the calves start to supplement nursing with solid food and then increases to stabilize at normal rates (Kastelein et al 1993b).…”

Section: Discussionmentioning

confidence: 81%

“…After this full nursing period, adult female food intake decreases to a minimum at around the time the calves start to supplement nursing with solid food and then increases to stabilize at normal rates (Kastelein et al 1993b). The decrease in food intake can lead to a decrease in lactation by variations in the fat and salt content of milk, which results in a lower energy transfer to the calf and eventually leads to little or no milk production that induces complete weaning (Eichelberger et al 1940;Kastelein et al 1993b)…”

Section: Discussionmentioning

confidence: 99%

“…In general, reproduction takes place from the austral spring (September) to summer (February) (Goodall 1994;Kastelein et al 1993a) during which females give birth to a single calf. The length of lactation in dolphins, with Commerson's dolphin being no exception, has been poorly studied in comparison with other marine mammals such as pinnipeds and baleen whales (Eichelberger et al 1940;Oftedal 1997). While it is known that the lactation period of Commerson's dolphin lasts at least 6 months, studies of captive individuals indicate that calves can begin to eat solid food at *2 months and by *8-12 months nursing ceases completely (Joseph et al 1987;Kastelein et al 1993b).…”

Section: Introductionmentioning

confidence: 99%

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Ontogenetic diet shift in Commerson’s dolphin (Cephalorhynchus commersonii commersonii) off Tierra del Fuego

2013

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Section: Discussionmentioning

confidence: 81%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ontogenetic diet shift in Commerson’s dolphin (Cephalorhynchus commersonii commersonii) off Tierra del Fuego

2013

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“…False killer whales have a long nursing periodup to two years -and a gradual weaning period where calves start to eat solid food, which occurs between 6 to 8 months of age (Clark and Odell, 1999). A gradual shift from maternal dependency to independent foraging is concomitant with a decrease in lactation to induce weaning (Eichelberger et al, 1940), which could contribute to (1) the small differences in ␦ 15 N values between the calves and older individuals and (2) the isotope differences observed between the calf measured by Botta et al (2012) and the calves measured in this study, since they seemed to have had different ages due to their total body length.…”

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confidence: 99%

Intra-specific trophic variation in false killer whales (Pseudorca crassidens) from the southwestern South Atlantic Ocean through stable isotopes analysis

Riccialdelli

Goodall

2015

Mammalian Biology

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The false killer whale (Pseudorca crassidens) is a highly social top predator difficult to study in the wild because of its wide-ranging oceanic habits. Mass strandings offer good opportunities to gather ecological information about cetacean species. In this study we analyze a possible isotopic (␦ 13 C and ␦ 15 N) variation in bone collagen among individual false killer whales that mass stranded on the south shore of the Strait of Magellan, Chile, in 1989, in relation to their ontogenetic classes, sex and total body length. We found an isotopic enrichment in ␦ 13 C and ␦ 15 N values from young and smaller to older and larger individuals, respectively. These isotopic shifts may reflect differences in foraging and diving capabilities, enabling older and larger individuals to feed more deeply in the water column and/or on larger prey. The lack of isotopic differences between females and males may suggests little evidence for sex-related resource partitioning in this group, as result of a possible coordination during feeding activities, e.g. food sharing as previous studies have found. We also found an important isotopic effect of lactation in both the carbon and nitrogen isotope composition of nursing calves, probably due to a prolonged nursing period (from 19 month to two years). This study integrate ecological information from several years to lifetime in relation to sex and total body length, obtaining information on possible changes linked to the development of foraging capabilities in false killer whale.

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“…These scientists published a wealth of entirely new information about the living dolphin. Among the early publications that were highly useful to me were those of DuBois et al (1940), Fetcher & Fetcher (1942, Eichelberger et al (1940a, 1940b, 1940c.…”

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confidence: 99%

Historical Perspectives: History of Veterinary Medicine and Marine Mammals: A Personal Perspective

Ridgway

2008

Aquat Mamm

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He completed a large share of the seminal work in marine mammal medicine, and he continues to promote both applied and basic research in the field of marine mammalogy. He has published over 260 papers, book chapters, and books, including one of the most definitive works on marine mammals, Mammals of the Sea (1972). Much of his work has examined mammalian bioacoustics with a focus on dolphin auditory physiology and echolocation. Dr. Ridgway and the late Dr. Kenneth Norris share the high distinction of being viewed as the founders of dolphin physiology and medicine.Dr. Ridgway earned his Bachelor of Science (1958) and Doctor of Veterinary Medicine degrees (1960) from Texas A&M University. Commissioned as a Veterinary Officer in the U.S. Air Force in 1960, he was sent from Texas to California. In California, he was soon involved in the initiation of the U.S. Navy Marine Mammal Program (NMMP) at Point Mugu. In the 1960s, Dr. Ridgway pioneered dolphin anesthesia, medical technology, and methods for studying trained dolphins swimming freely in the open sea. In 1965, his work on marine mammal diving transitioned for use in the Navy SEALAB II project. At the suggestion of Captain George Bond, Medical Director of SEALAB, in 1966, Sam began preliminary work at Point Mugu, California, on the dolphin's ability to detect human divers. This work transitioned to Hawaii for development by Navy trainers and engineers of animal/human underwater intruder defense teams, first used in Viet Nam starting in 1970. (Human diver/marine mammal teams continue to work for personnel safety today in harbor defense, mine hunting, and underwater object recovery; see www.spawar.navy.mil/ sandiego/technology/mammals/index.html.) In 1970, Dr. Ridgway received a Navy fellowship for study under Professor Richard Harrison, FRS at Cambridge University, England. He earned his Ph.D. and returned to NMMP, which had moved to San Diego while he was in Cambridge. Dr. Ridgway has served on over 20 Ph.D. committees and has personally trained over 30 veterinarians through two-to six-year tours of duty with NMMP. Professionals Dr. Ridgway has mentored are now in zoological institutions, on university faculty, in the military (one is a General Officer), in government employment, and one is an astronaut. Dr. Ridgway is an elected Fellow of the Acoustical Society of America for his studies on hearing of marine mammals and also is a Fellow of the American College of Zoological Medicine for his work on marine mammal medicine. In 2008, the Acoustical Society of America honored Dr. Ridgway at their 156th conference in Miami, Florida, with 24 special presentations on his work over the past 40 years. Other awards include the Distinguished Alumnus Award, Texas A&M University, College of Veterinary Medicine; the Lifetime and Clinical Medicine Awards from the International Association for Aquatic Animal Medicine; Lifetime Membership Award, Society for Marine Mammalogy; the ZooMarine Award of the European Association for Aquatic Mammals; and two Navy awards-the Gilbert H. C...

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The Composition of Dolphin Milk

Cited by 19 publications

References 7 publications

Ontogenetic diet shift in Commerson’s dolphin (Cephalorhynchus commersonii commersonii) off Tierra del Fuego

Ontogenetic diet shift in Commerson’s dolphin (Cephalorhynchus commersonii commersonii) off Tierra del Fuego

Intra-specific trophic variation in false killer whales (Pseudorca crassidens) from the southwestern South Atlantic Ocean through stable isotopes analysis

Historical Perspectives: History of Veterinary Medicine and Marine Mammals: A Personal Perspective

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