Le Phoque Moine, Monachus Monachus Hermann 1779, Sur Les Cotes Méridionales Du Sahara

Maigret, Jacques; Trotignon, J. P.; Duguy, R.

doi:10.1515/mamm.1976.40.3.413

Cited by 4 publications

(5 citation statements)

References 1 publication

(1 reference statement)

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“…La structure de cet habitat a e*te decrite par Postel (1950), , Ronald et Healey (1974), Bareham et Furreddu (1975), Maigret, Trotignon et Duguy (1976).…”

Section: -Habitatunclassified

“…Bareham et Furreddu (1975) signalent qu'elle est plus active la nuit que le jour. Quelques observations sur Factivite et le comportement en mer des phoques moines ont ate faites par Tun de nous (Duguy, 1976 ;Maigret, Trotignon et Duguy, 1976) en Mauritanie.…”

Section: -Cycle Journalier D'activiteunclassified

“…Toutefois, devant la diminution de plus en plus alarmante de cette espece dans toute son aire de repartition, de premieres mises au point de son Statut actuel ont ete entreprises par differents auteurs ( van Wijngaarden, a, b, c, 1964Ronald, 1973 ;Ronald et Healey, 1974Boulva, 1975 ;Maigret, Trotignon et Duguy, 1976).…”

Section: Introductionunclassified

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Le phoque moine, Monachus monachus (Hermann, 1779), en Grèce

Marchessaux¹,

Duguy²

1977

Mammalia

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“…La structure de cet habitat a e*te decrite par Postel (1950), , Ronald et Healey (1974), Bareham et Furreddu (1975), Maigret, Trotignon et Duguy (1976).…”

Section: -Habitatunclassified

Section: -Cycle Journalier D'activiteunclassified

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Le phoque moine, Monachus monachus (Hermann, 1779), en Grèce

Marchessaux¹,

Duguy²

1977

Mammalia

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“…There is little information on pup survival rates and causes of mortality for the Mediterranean monk seal, one of the most endangered mammals worldwide (Reijnders et al 1993). The data on pup mortality comes from seals killed by fishermen or accidentally entangled in fishing gear reported in Greece (Cebrian andVlachoutsikou 1991, Panou et al 1993) and dead pups found stranded on the beaches or found inside caves in the colony of Cab0 Blanco, Western Sahara-Mauritania (Maigret et al 1976, Trotignon 1979, Marchessaux and Muller 1987 and Sardinia (Bareham and Furredu 1975).…”

mentioning

confidence: 99%

PUP SURVIVAL IN THE MEDITERRANEAN MONK SEAL (MONACHUS MONACHUS) COLONY AT CABO BLANCO PENINSULA (WESTERN SAHARA‐MAURITANIA)

Gazo¹,

Aparicio

Cedenilla

et al. 2000

Marine Mammal Science

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We surveyed pup survival in Mediterranean monk seals (Monachus monachus), at Cabo Blanco Peninsula (Western Sahara‐Mauritania) colony from May 1993 to December 1997. This species breeds and hauls out on beaches inside two main caves. During the study period we detected a total of 93 pups that died or disappeared. The survival rate of 84 pups through the age of first moult (approximately two months) was 0.47. This value is similar to those reported for other pinnipeds breeding in caves but lower than for those breeding on open beaches. Mortality varied seasonally and appeared to increase as a result of storms, large ocean swells, and high tides. Mother‐pup pair separation (and resulting pup starvation) and physical injury caused by impact against the rock walls of the cave and cliffs were established as the causes of most deaths. Beach surface area inside the caves also appeared to be a mediating factor in the effects of sea conditions. High pup mortality may be a limiting growth factor in this population, although cave dwelling protects the population from predators and human disturbance.

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“…However, these estimates were derived from poor quaility ®eld data. Thus, in the eastern Mediterranean population estimates originated from information supplied by ®shermen and tourists (Sergeant et al, 1978;Cebrian & Vlachoutsikou, 1991;Panou, Jacobs & Panos, 1993), and in the colony of Cabo Blanco they were collected during sporadic and short ®eldwork surveys (Morales-Agacino, 1945;Maigret, Trotignon & Duguy, 1976;Trotignon, 1979;Marchessaux, 1989;Francour et al, 1990) and are therefore not considered reliable.…”

Section: Discussionmentioning

confidence: 99%

Pupping season, perinatal sex ratio and natality rates of the Mediterranean monk seal (Monachus monachus) from the Cabo Blanco colony

et al. 1999

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Pupping seasonality, annual pup production, reproductive rate and sex ratio at birth were determined for the Mediterranean monk seal Monachus monachus colony at Cabo Blanco, the only surviving population of the species which still shows a colony structure. Data were collected by means of a monitoring programme that operated continuously in the main reproductive areas of the population during the period March 1993±May 1997. Most (84%) of the pups observed were born in two caves separated by a short distance. Although both caves were used by females to bear the pups, preferences greatly¯uctuated from season to season with no apparent trend. Reproduction occurred throughout the year with a small peak of births in October. This unusual lack of seasonality is associated with the low latitudinal location of the colony and the effect of the upwelling that provides constant food throughout the year. The neonatal sex ratio did not differ signi®cantly from 1 : 1 and the estimated annual productivity ranged from 44±58 pups. Taking into account population numbers, the annual birth rates were estimated to range from 0.3 to 0.43 pups per reproductive female, an extremely low rate when compared to other pinniped populations, particularly those of a similar size. Such low rates may be either an evolutionary determined characteristic of the species or a demographic consequence of the low population density over the last few centuries. Coupled with high pup mortality rates, this may account for the observed non-recovery of the population.

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Le Phoque Moine, Monachus Monachus Hermann 1779, Sur Les Cotes Méridionales Du Sahara

Cited by 4 publications

References 1 publication

Le phoque moine, Monachus monachus (Hermann, 1779), en Grèce

Le phoque moine, Monachus monachus (Hermann, 1779), en Grèce

PUP SURVIVAL IN THE MEDITERRANEAN MONK SEAL (MONACHUS MONACHUS) COLONY AT CABO BLANCO PENINSULA (WESTERN SAHARA‐MAURITANIA)

Pupping season, perinatal sex ratio and natality rates of the Mediterranean monk seal (Monachus monachus) from the Cabo Blanco colony

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